ABSORBING TROUSERS

专利摘要:
The present invention relates to a disposable absorbent underwear article comprising: a liquid-permeable topsheet, a liquid-impervious backsheet, an absorbent core therebetween; a chassis comprising a laminate having a front section, a rear section and a crotch section; transversely opposite first and second leg opening defining edges, aforementioned first and second leg opening defining edges further define a crotch width in the crotch section, aforementioned front and back section include transversely opposite first and second front and back section edges, respectively, defining a front and a rear section width, respectively ; wherein said front and back section comprise a front and rear elastic waistband respectively, each of said elastic waistbands being stretchable in at least the transverse direction; wherein said front and rear sections can be substantially elastically stretched to a maximum front and rear section width, each of said maximum widths being greater than a minimum crotch width by a factor of at least 1.0.
公开号:BE1022527B1
申请号:E2014/5098
申请日:2014-11-28
公开日:2016-05-24
发明作者:Poorter Annick De
申请人:Ontex Bvba；
IPC主号:

专利说明:

ABSORBING TROUSERS
TECHNICAL FIELD
The invention belongs to the technical field of absorbent hygiene products. In particular, the present invention relates to an absorbent article for absorbing body fluids and secretions, such as urine and faecal material. More specifically, the present invention relates to absorbent garments, such as disposable incontinence diapers or pant diapers, which are formed to collect and retain faecal material and prevent leakage.
BACKGROUND
The present invention relates to disposable absorbent underwear articles, and in particular to adult incontinence diapers and similar articles, more particularly to adult incontinence diapers that can be worn as a pant diaper.
Older persons use underwear articles in the form of diapers to be fastened around the wearer's torso by means of releasable fasteners, such as tape systems or loop-and-hook systems, or trouser diapers with a lifting system, for incontinence and other ailments. These underwear articles generally have the same construction nature and use the same components, although different in size. However, the size of the underwear article is not the only parameter that ensures a good fit and therefore a good absorbency to the user. A good fit and absorption capacity is necessary to prevent leakage of physical secretions, especially during the night, when the wearer is sleeping and / or has difficulties going to the toilet. Furthermore, to improve the mental and physical comfort of the user, it could be important to ensure that an absorbent underwear article, when worn under the user's clothing, is not visible to others.
Since custom-made disposable underwear articles are commercially impracticable, an optimum number of types of underwear articles must be found, which is a compromise between ensuring that each person finds an appropriate size of article, and minimizing the number of production lines in order to make the disposable products produce as cheaply as possible. Hereby it seems necessary to identify which shapes and relative dimensions of the components of the underwear article are important parameters for ensuring a good fit for the majority of wearers, while limiting the number of production lines and production costs.
There remains a need in the prior art for an improved disposable absorbent underwear article that allows a good fit for a large number of people and that can be produced cheaply in large quantities.
To this end, it is an object of the invention to provide a disposable absorbent underwear article that offers a good fit to as many users as possible, in particular while sleeping or sitting for extended periods.
SUMMARY OF THE INVENTION
The present invention provides an absorbent hygiene product suitable to be worn around the lower torso of a wearer, such as a disposable adult incontinence diaper or pant diaper, according to claim 1.
The product of the present invention overcomes the difficulties of the prior art products, since it provides an underwear article with an optimal absorbency while guaranteeing an optimum fit for the wearer and reducing overall production costs. In one embodiment, the present invention provides such underwear articles that can be manufactured without loss of laminated material due to cutting. In an alternative embodiment, the present invention provides such underwear articles that can be manufactured with a minimum of adhesions, in particular without the need to adhere side panels to a laminate. In one embodiment, the present invention provides such underwear articles that, when worn by a user, are not visible to other people.
DESCRIPTION OF THE FIGURES
Figures 1 to 4 show a top view of a underwear article according to the present invention when stretched to a substantially flat-laid state.
Figure 5 shows a perspective view of a underwear article according to the present invention when worn.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a disposable absorbent underwear article for absorbing bodily secretions, which is specifically adapted to be worn around the lower torso of wearer. In a preferred embodiment, the present invention relates to a disposable absorbent underwear article for absorbing bodily secretions, which can be worn as a diaper under daily clothing.
The recitation of numerical ranges by end points includes all numbers and fractions that are included within that range, as well as recited end points.
Unless otherwise specified, all terms used to disclose the invention, including technical and scientific terms, have the meaning as generally understood by one of ordinary skill in the art to which this invention belongs. By way of further guidance, term definitions are included to better appreciate the teachings of the present invention.
As used herein, the following terms have the following meanings:
The term "% weight" (weight percent), throughout and throughout the specification, unless otherwise specified, refers to the relative weight of the respective component based on the overall weight of the formulation. "A," "an," and "an," as used herein, refers to both singular and plural referents unless the context clearly dictates otherwise. As an example, a "compartment" refers to one or more than one compartments. "Approximately" as used herein refers to a measurable value such as a parameter, an amount, a temporary duration, and the like, intended to include variations of +/- 20% or less, preferably +/- 10% or less , more preferably +/- 5% or less, even more preferably +/- 1% or less, and even more preferably +/- 0.1% or less of the specified value, in so far such variations have been designated to the disclosed invention to function. However, it must be understood that the value to which the "approximately" provision refers itself is also specifically disclosed. "Absorbent article" refers to devices which absorb and retain liquid, and more specifically refers to devices placed against or in proximity to the wearer's body to absorb and retain the various secretions discharged by the body. The absorbent articles include but are "not> limited". to diapers, adult incontinence briefs, training pants, diaper holders and liners, sanitary napkins and the like, as well as surgical dressings and sponges.
The "absorbent medium" or "absorbent core" or "absorbent body" is the absorbent structure positioned between the topsheet and the backsheet of the absorbent article in at least the crotch region of the absorbent article and is capable of absorbing liquid body secretions and hold. The size and the absorbent capacity of the absorbent medium should be compatible with the size of the intended support and the liquid charge provided by the intended use of the absorbent article. Furthermore, the size and the absorption capacity of the absorbent medium can be varied to accommodate carriers ranging from babies to adults. It can be manufactured in a wide variety of shapes (for example, rectangular, trapezoidal, T-shape, I-shape, hourglass shape, etc.) and from a wide variety of materials. Examples of commonly occurring absorbent materials are cellulose fluff! pulp, tissue layers, highly absorbent polymers (so-called super-absorbent polymer particles (SAP)), absorbent foam materials, absorbent non-woven materials or the like. It is common to combine cellulose fluff pulp with superabsorbent polymers in an absorbent material. I "Acquisition and distribution layer", "ADL" or "flow management part" refers to an underlayer that is preferably a non-woven wicking layer under the topsheet of an absorbent product, which speeds up transport and improves the distribution of liquids over the absorbent core . The flow management portion is typically less hydrophilic than the retention portion, and has the capacity to rapidly collect and temporarily retain fluid streams, and to transport fluid from its initial entry point to other parts of the absorbent structure, particularly the retention portion. This configuration can help to prevent the fluid from flowing and collecting on the portion of the absorbent garment positioned against the wearer's skin, thereby reducing the wearer's sense of moisture. Preferably, the flow management portion is placed between the topsheet and the retention portion.
The term "adhesive" as used herein refers to any suitable hot melt, water or solvent based adhesive that can be applied to the surface of a film layer in the required pattern or network of adhesive areas to form the film-nonwoven laminate of . present invention. Accordingly, suitable adhesives include conventional hot melt adhesives, pressure sensitive adhesives, and reactive adhesives (i.e., polyurethane).
As used herein, the term "adhesive bonding" means a bonding process that forms a compound by using an adhesive. Such adhesive can be used by various processes such as groove coating, sprayed coating and other surface applications. Furthermore, such adhesive can be applied to a product component and then exposed to a pressure such that the contact of a second product component with the product component comprising adhesive forms an adhesive bond between the two components.
As used herein, an "air-formed web" refers to a material comprising cellulose fibers such as those from fluff pulp that were separated, such as by a hammer mill process, and then deposited on a porous surface without the presence of a substantial amount of binding fibers. For example, air-shaped materials used as the absorbent core in various diapers are a typical example of an air-shaped material.
As used herein, an "air laid web" is a fibrous structure formed essentially by a process that involves depositing air entrained fibers on a mat, typically in the presence of bonding fibers, and typically followed by a densification and thermal bonding. In addition to traditional thermally bonded air-laid structures (those formed in the presence of non-sticky binder materials and substantially thermally bonded), the scope of the term "air-laid" according to the present invention may also include coforms made by the combination of air-entrained dry, dispersed cellulose fibers with meltblown synthetic polymer fibers while the polymer fibers are still sticky. Furthermore, an air-shaped web to which subsequently a binder material is added may also fall within the scope of the term "air laid" according to the present invention. The binder can be added to an air-formed web in liquid form (e.g., an aqueous solution or melt) by spray nozzles, directional injection or impregnation, vacuum draw, foam impregnation, and so on. Solid binder particles can also be added by mechanical or pneumatic means.
As used herein, the term "associated" includes configurations in which the topsheet is connected directly to the backsheet by attaching the topsheet directly to the backsheet, and configurations in which the topsheet is attached to the backsheet by attaching the topsheet to intermediate members who are in turn attached to the backsheet. The topsheet and the backsheet can be directly attached to each other by adhesives such as adhesives, sonic bonds, thermal bonds or any other adhesives known in the prior art. For example, a uniform continuous layer of adhesive, a patterned layer of adhesive, a sprayed pattern of adhesive or a series of separate lines, swirls or stains of structural adhesive can be used to adhere topsheet to backsheet. It should be clear here that the above-described adhesion means can also be used to interconnect and assemble the various other component parts of the article described herein.
The terms "rear section" and "back rear section" are used herein as synonyms and refer to the area of the absorbent article that is in contact with the wearer's back when the absorbent article is worn.
The term "backsheet" refers to a material that forms the outer cover of the absorbent article. The backsheet prevents partitions contained in the absorbent structure from wetting articles that are in contact with the disposable absorbent article, such as bed sheets and overclothes. The backsheet can be a single layer of material or can be a composite layer that is composed of multiple components that are assembled or laminated side-by-side. The backsheet can be the same or different in different parts of the absorbent article. At least in the region of the absorbent medium the backsheet consists of a liquid impermeable material in the form of a thin plastic film, e.g. a polyethylene or polypropylene film, a non-woven material with a liquid impermeable material, a hydrophobic non-woven material that resists liquid penetration, or a laminate of a plastic film and a non-woven material. The backsheet material can be air permeable such that water vapor can escape from the absorbent material, while liquids are still prevented from passing through. Examples of breathable backsheet materials are porous polymer films, non-woven laminates from! spunbond and meltblown layers and laminates of porous polymer films and non-woven materials. ·
The terms "abdominal section" and "anterior abdominal section" are used herein as synonyms, and refer to the field of. the absorbent article that is in contact with the wearer's abdomen when the absorbent article is being worn.
A strap can be attached to the diaper to provide a mechanism for holding the diaper on the wearer. The belt may either be one continuous belt attached to the diaper at the front and / or rear waistband region thereof or may comprise two separate belt portions, each attached to a respective side of the front and / or rear waistband region of the diaper. When a belt is present, the absorbent article is often referred to as a belt diaper. A "belt diaper" is intended to enclose the lower portion of the wearer's torso such as an absorbent waist diaper. For example, if the strap includes two strap portions extending on either side of the diaper's back waistband region, the strap diaper can be attached to the wearer in the following manner: the two strap portions are first fastened around the wearer's waist while front end of the diaper hangs down between the legs of the wearer. Once the belt portions are connected together, the wearer can reach between his or her legs to pull up the absorbent garment between the legs and attach the free end of the diaper to the belt portion. Attaching the two strap portions and attaching the strap to the diaper typically occurs with fasteners such as hook and loop fasteners, e.g. VELCRO®, or self-adhesive fasteners. However, it is to be understood that other types of fasteners are possible, including, but not limited to, self-adhesive, snap fasteners and buttonholes, knots and cords. The belt diaper can also be made so that the belt is attached to the front portion of the product and secured around the back of the wearer. In this case, the absorbent product will hang down on the front and be attached to the strap on the back.
The term "blend" means a blend of two or more polymers while the term "alloy" means a subclass of blends in which the components are immiscible but made compatible.
As used herein, the "body-turned" or "body-side" surface means that surface of the article or component that is intended to be arranged or placed toward or adjacent to the wearer's body during normal use, while the "outgoing "," outgoing turned "or" garment-side "surface is on the opposite side, and is intended to be suitably turned away from the wearer's body during normal use. Such outgoing surface can be adapted to be fitted to or adjacent to the wearer's undergarments or when the absorbent article is being worn. "Connected" refers to the joining, attachment, connection, attachment, or the like, of at least two elements. Two elements will be considered connected when they are directly connected to each other or indirectly to each other, such as when each is directly bound to intermediate elements.
The term "air permeable" refers to films that have a water vapor transmission rate (WVTR) of at least 300 grams / m2 - 24 hours. )
A "carded web" refers to webs made from staple fibers controlled by a combing or carding unit, which opens the staple fibers and directs them according to the machine direction to form a generally machine direction-oriented fibrous non-woven web. The web is then bound by one or more known binding methods. Connecting non-woven webs can be achieved by a number of methods; powder binding, wherein a powdered adhesive or binder is distributed through the web and then activated, usually by heating the web and the adhesive with hot air; pattern binding, in which heated calendar rolls or ultrasonic binding equipment is used to bind the fibers together, usually in a localized binding pattern, although the web can be bound over its entire surface if desired; air-binding, wherein air that is hot enough to soften at least one component of the web is passed through the web; chemical bonding, using, for example, latex adhesives deposited on the web by, for example, spraying; and consolidation by mechanical methods such as needle felting and water entanglement.
As used herein, the term "cellulose" is intended to include any material that has cellulose as its main constituent, and specifically comprises at least 50 weight percent cellulose or a cellulose derivative. Thus, the term includes cotton, typical wood pulp, non-woody cellulose fibers, cellulose acetate, cellulose triacetate, artificial silk, thermomechanical wood pulp, chemical wood pulp, dissolved chemical wood pulp, silk plant, or bacterial cellulose.
The "chassis" refers to a fundamental constituent of an absorbent article to which the remainder of .4e structure of., The article is built up or superimposed, e.g., in a diaper, the structural elements which, when configured to to wear, the diaper takes the form of a slip or pants, such as a backsheet, a topsheet, or a combination of a topsheet and a backsheet. "Covorm" as used herein is intended to describe a mixture of meltblown fibers and cellulose fibers formed by the air formation of a meltblown polymeric material while simultaneously blowing air-suspended cellulose fibers into the stream of meltblown fibers. The coform material can also include other materials, such as super-absorbent particles. The meltblown fibers containing wooden fibers are collected on a forming surface, as provided by a perforated belt. The forming surface may comprise a gas-permeable material, such as spunbonded fabric material, which is placed on the forming surface. "Compression" refers to the process or result of printing by applying force to an object, thereby increasing the density of the object. "Include", "include", and "include", and "include from" as used herein are synonymous with "consist of", "consist of", "consist of", or "contain", "contain", "contain ", and are inclusive or open terms indicating the presence of what follows, eg component and which do not exclude or prevent the presence of additional, non-recited components, features, element, members, steps, known from or described in the state under the technique.
The term "mainly consisting of" does not exclude the presence of additional materials that do not significantly affect the desired characteristics of a particular composition or product. Exemplary materials of this kind may include, without limitation, pigments, antioxidants, stabilizers, surfactants, waxes, current promoters, solvents, particles, and materials that are added to increase the processability of the composition.
Furthermore, the pant diaper may include "inclusion flaps" or "barrier cuffs." The containment flaps are generally considered to be particularly suitable for the containment of faecal matter and to prevent the lateral flow of liquid waste until the liquid waste can be absorbed by the absorbent article. Many constructions of containment flaps are known. Such containment flaps generally consist of a proximal edge intended to be attached to the absorbent article, and an opposite distal edge that is generally not attached to the absorbent article along at least a portion of its length. An elastic member is generally located adjacent the distal edge to help maintain the containment flap in an upright condition and to maintain a sealing contact between the distal edge of the containment flap and a wearer's body during use. The elastic member is generally positioned between two layers of material so that the elastic does not come into contact with the body of a wearer. The containment flaps can be made from a wide variety of materials such as polypropylene, polyester, artificial silk, nylon, foam, plastic films, molded films, and elastic foams. Various production techniques can be used to manufacture the containment flaps. For example, the containment flaps can be woven, non-woven, spunbond, carded, cast, blown, or the like.
The pant diaper may include leg containment gaskets. Leg "containment packs" help prevent leakage of bodily secretions when the wearer exerts compressive forces on the absorbent article. In particular, the stiffness of the leg containment gaskets prevents twisting and bundling of the leg openings of the absorbent article which can lead to leakage. In addition, the elasticity and formability of the leg containment gaskets ensure that the body facing surface of the leg containment gaskets form a suitable seal against the wearer's body. The physical properties of the leg containment gaskets, such as the thickness and stiffness, also function to keep the topsheet and absorbent core away from the wearer's body during use. Thus, an empty volume is created between the wearer's body and the topsheet and absorbent core of the absorbent article to help retain body secretions. "Continuous" means that the structure described is a closed-loop structure.
The continuous structure can be single, i.e., a one-piece structure, or can be made from individual elements, suitably assembled to form a closed loop.
An "uninterrupted waistband" can be an elastomeric, cotton-like, non-woven fibrous material, such as an elastomer stretch bonded laminated web or an elastomer meltblown web. By the correct selection of materials, the continuous belt can be temporarily Ælastically limited, such as by compression.
Once temporarily elastic limited, the elastic material from which the waistband is comprised can be activated, such as by heat treating, to regain a state of elasticity. "Conventional hot-melt adhesive" means a composition that generally consists of several components. These components typically include one or more polymers to provide cohesive force (e.g., aliphatic polyolefins such as poly (ethylene-co-propylene) copolymer; ethylene vinyl acetate copolymers; styrene-butadiene or styrene isoprene block copolymers, etc.); a resin or an analogous material (sometimes referred to as a tackifier) to provide adhesion power (e.g., hydrocarbons distilled from petroleum distillates; resins and / or resin esters; terpenes derived from , for example, wood or citrus, etc.); optional waxes, plasticizers or other materials to change viscosity (ie, fluidity) (examples of such materials include, but are not limited to, mineral oil, polybutene, paraffin oil, ester oils, and the like) and / or other additives including, but not limited to, antioxidants or other stabilizers ators. A typical hot melt adhesive composition may comprise from about 15 to about 35 weight percent cohesive force polymer or polymers; from about 50 to about 65 percent by weight of resin or other tackiness promoter or tackiness promoters; from more than zero to about 30 weight percent plasticizer or other viscosity change agent; and optionally less than about 1 weight percent stabilizer or other additive. It is to be understood that other adhesive compositions are possible that include different weight percentages of these components.
The term "density" or "concentration" when referring to the absorbent material, in particular SAP, of a layer refers to the amount of the absorbent material divided by the surface of the layer over which the absorbent material is spread.
As used herein, the term "diaper" refers to an absorbent article that is generally worn by incontinent persons around the lower torso. To use the diaper around the wearer's waist, the diaper is typically first placed between the wearer's legs and then attached around the wearer's waist using fasteners, preferably in a reclosable manner around the diaper. .. carrier, to be removed after or during use. "Interrupted bonding pattern" as used herein refers to a pattern of bonding regions, in particular bonding regions between layers, wherein at least in one region the layers are not bonded. further comprising a bonded bonding region, comprising a plurality of holes where the layers are not bonded, preferably according to a regular pattern, or it may comprise separate bonded bonding regions, e.g., a dot bonding pattern comprising a plurality of individual bonding points surrounded with unbound regions or a line-binding pattern comprising a plurality of individual binding lines interspersed with unbound regions, preferably according to a regular pattern. "Disposable absorbent garments" preferably include a front section, a rear section, a cross-section, elas side sections, seams, a continuous waist opening, and / or a pair of continuous leg openings. Each elastic side section preferably comprises a front elastic side member and a rear elastic side member which may be joined together to a respective seam.
The term "disposable" is used herein to describe absorbent articles that are generally not intended to be washed or otherwise repaired or reused as an absorbent article (ie, they are intended to be discarded after single use and, preferably to be recycled, composted or otherwise disposed of in an environmentally compatible manner).
As used herein, the term "elastic resistance" describes an elastic force that attempts to resist an applied tensile force, whereby a material provided therewith tends to contract to an unstressed configuration in response to an stretching force.
As used herein, the terms "elastic", "elastomeric", "elasticity" or derivatives thereof are used to describe the capacity of various materials and articles provided with them to undergo a reversible deformation under stress, e.g. stretched or elongated, in at least one direction when a force is applied to the material and, substantially, to their original dimensions, return when relaxed, ie, when the force is released, without tearing or breakage. Preferably, it refers to a material or composite that can be extended in at least one direction by at least 50% of its relaxed length, ie extended to at least 150% of its relaxed length, and which when released from the applied tension is at least 40% of its extension. Accordingly, upon release of the applied voltage at 50% elongation, the material or composite will contract to a relaxed length of no more than 130% of its original length. Examples of suitable elastomeric materials include polyether-polyamide block copolymers, polyurethanes, synthetic linear ABA and AB block copolymers, chlorinated rubber / EVA (ethylene-vinyl acetate) blends, EPDM (ethylene-propylene diene monomer) rubbers, EPDM, (ethylene-propylene monomer) rubbers, blends from EPDM / EPM / EVA, and the like.
The term "made elastic" refers to a material, layer, or substrate that is not naturally elastic, but that is made elastic by, for example, suitably joining an elastic material, a layer, or a substrate. "Extension" means the ratio of the extension of a material to the length of the material prior to the extension (expressed in percent), as represented by the following: "Extension" means the change in length of a material through stretching (expressed in units of length).
As used herein, the term "extensible" means extendable in at least one direction, but not necessarily recyclable.
The term "fabric" is used to refer to all woven, knitted and non-woven fibrous webs. "Fasteners," such as tape tape fasteners, are typically applied to the rear waistband region of the diaper to provide a mechanism for holding the diaper on the wearer. Fasteners, such as tape tape fasteners, snaps, pins, belts, hooks, buckles, "hook / mushroom" and loop fasteners (e.g., VELCRO®-type fasteners) and the like, can be used and are typically applied to the lateral, side ends from the rear waistband region of a diaper to provide a mechanism for holding the diaper over the wearer's waist in a conventional manner. Tape tape fasteners can be as known in the art, and are typically applied to the corners of the diaper. For example, self-adhesive fasteners, mechanical fasteners, hook and loop fasteners, snaps, pins or buckles can be used alone or in combination. For example, the fasteners may be self-adhesive fasteners made to be reversibly adhered to a landing zone piece adhered to the front waistband region of the diaper to provide a resealable self-adhesive fastening system.
The term "finished" or "final", when used in relation to a product, means that the product was suitably manufactured for its intended purpose.
The term "flexible" refers to materials that are compliant and that readily adapt to the general shape and contours of the wearer's body.
As used herein, the term "article of clothing" means any type of clothing that can be worn. This includes diapers, training pants, incontinence products, surgical gowns, industrial work clothes and covers, underwear articles, pants, shirts, jackets and the like. The term "underwear article" refers to a garment that is typically worn among other garments and that is intended to make direct contact with the wearer's body.
The term "drawing" includes, but is not limited to, any type of design, image, sign, number, codes, words, patterns, or the like. For a product such as training pants, a drawing will generally include items associated with little boys and girls, such as multicolored trucks, planes, balls, dolls, bows, or the like.
Many of the known superabsorbent polymer particles exhibit gel blockage. "Gel blocking" occurs when superabsorbent polymer particles get wet and the particles swell to block fluid transmission to other areas of the absorbent structure. The wetting of these other areas of the absorbent member therefore takes place via a very slow diffusion process. In practical terms, this means that the acquisition of liquids due to the absorbent structure is much slower than the speed at which the liquids are discharged, especially in miction situations. Leakage of the absorbent article can occur well before the particles of SAP in the absorbent member are only close to full saturation or before the liquid can disperse or wick past the "blocking" particles to the rest of the absorbent member. Gel blocking can be a particularly acute problem if the superabsorbent polymer particles do not have suitable gel strength and deform under stress as soon as the particles swell with absorbed liquid.
The term "high absorption material" refers to materials that are capable of absorbing at least 10 times their own weight in liquid. The high absorption material may comprise absorbent gel-forming materials, such as super-absorbent polymers. Superabsorbent polymers are water-swellable, water-insoluble organic or inorganic materials suitable to absorb at least about 20 times their own weight of an aqueous solution containing 0.9 weight percent of sodium chloride. The absorbent gel-forming materials can be natural, synthetic, and modified natural polymers and materials. In addition, the absorbent gel-forming materials may be inorganic materials, such as silica gels, or organic compositions such as cross-linked polymers. The term "cross-linked" refers to any means to effectively make water-soluble materials substantially water-insoluble but swellable. Such agents may include, for example, physical confusion, crystalline domains, covalent bonds, ionic complexes and associations, hydrophilic associations such as hydrogen bonds, and hydrophobic associations or Van der Waals forces. Examples of synthetic absorbent gel-forming material polymers include the alkali metal and ammonium salts of poly (acrylic acid) and poly (methacrylic acid), poly (acrylamides), poly (vinyl ethers), maleic anhydride copolymers with vinyl ethers and alpha-olefins, poly (vinyl pyrrolidone), poly (vinyl morpholinone) ), poly (vinyl alcohol), and mixtures and copolymers thereof. Further polymers suitable for use in the absorbent structure include natural and modified natural polymers, such as hydrolyzed acrylonitrile-grafted starch, acrylic acid grafted starch, methyl cellulose, carboxymethyl cellulose, hydroxypropyl cellulose, and natural gums such as alginates, xanthan gum, locust bean gum and of such. Mixtures of natural and wholly or partially synthetic absorbent polymers can also be used. Synthetic absorbent gel-forming materials are typically xerogels that form hydrogels when wetted. However, the term "hydrogel" is also commonly used to refer to both wetted and non-wetted forms of the material. The high-absorption material can have any of a wide variety of geometric shapes. It is generally preferred that the high absorption material be in the form of individual particles. However, the high-absorption material can also be in the form of fibers, flakes, rods, spheres, needles, spiral or semi-spiral, cube, rod-like, polyhedral, or the like. Conglomerates of particles of high absorption material can also be used. The high absorbent material may be present in the absorbent core in an amount of about 5 to about 100 weight percent and desirably from about 30 to about 100 weight percent based on the total weight of the absorbent core. The distribution of the high-absorption material within the various parts of the absorbent core may vary depending on the anticipated end use of the absorbent core. The high absorption material can be arranged in a generally separate layer within the matrix of hydrophilic fibers. Alternatively, the absorbent core may comprise a laminate of fibrous webs and high-absorption material or other suitable means to maintain a high-absorption material in a localized area.
A "hook-and-loop fastener" refers to complementary fasteners that have a "hook" portion and a "loop" portion and that are resealable. The term "hook" as used herein refers to any element suitable for entering into a connection with another element, the so-called "loop" portion. The term "hook" is not limited to "hooks" in their normal sense, but may include any form of attachment elements, either in one direction or in two directions. The term "loop" is also not limited to "loops" in their normal sense, but also encompasses any structure suitable for a "hook" fastener to attach to. Examples of "loop" materials are fibrous structures, such as non-woven materials. "Water entanglement process" refers to the production of non-woven webs. The process involves directing a series of water jets to a fibrous web that is worn on a moving porous belt. The jets of water go down through the mass of fibers and when making contact with the surface of the belt, the rays bounce back and break them up: the energy that is released causes entanglement of the mass of fibers.
The term "hydrophilic" describes fibers or the surfaces of fibers that are wetted by the aqueous liquids in contact with the fibers. The degree of wetting of the materials can in turn be expressed in terms of the contact angles and the surface tension of the liquids and materials in question. The term "wettable" is intended to refer to a fiber that makes an air contact angle with a liquid, such as water, synthetic urine, or an aqueous saline solution of 0.9% by weight, of less than 90 °, while "hydrophobic" or "non-wettable" fibers describe fibers that have contact angles equal to or greater than 90 °.
As used herein, the term "impervious" generally refers to articles and / or elements that cannot be substantially permeated by an aqueous liquid throughout their full thickness under a pressure of 1.0 kPa or less. Preferably, the impervious article or element is not permeable to an aqueous liquid under pressures of 3.4 kPa or less. More preferably, the impervious article or element is not permeable to an aqueous liquid under pressures of 6.8 kPa or less. An article or an element that is not impenetrable is permeable. "Incontinence pants diapers", "pants diapers" or "pants diapers", as used herein, refer to disposable garments that have a waist opening and leg openings designed for incontinent persons. A pant diaper can be applied to the wearer by inserting the wearer's legs into the leg openings and sliding the pant diaper into position around the wearer's lower torso. A pant diaper can be preformed by any suitable technique including, but not limited to, securing two portions of the article using resealable and / or non-resealable connections (e.g., seam, weld, adhesive, cohesion bond, fastener, etc.). A trouser diaper can be preformed anywhere along the perimeter of the item (eg, attached to the side, attached to the front waist). While the terms "pant diaper" or "pant diaper" are used herein, pant diapers are also commonly referred to as "closed diapers", "preformed diapers", "pull-on diaper" and "diaper pants". "Integral" is used to refer to various portions of a single unitary element rather than to the individual structures that are bonded or placed close together. "Connecting", "connecting", "connected" or variations thereof, when used to describe the relationship between two or more elements, means that the elements can be connected in any suitable way, such as by heat sealing, » ultrasonic bonding, -Thermal bonding,. by adhesives, stitching, or the like. Furthermore, the elements can be connected directly, or they can comprise one or more elements positioned between them, which are all connected together.
The term "flat-laid state" or "flat state" is intended to refer to the article when it is flattened in a plane or substantially flattened in a plane and is used as opposed to when the article is positioned differently such as when the article is folded or formed during or for use by a carrier. Preferably, and typically when the article comprises elastic means, the article can be elastically stretched to the aforementioned flat-laid state. Unless otherwise specifically indicated, the widths and lengths of the article or components of the article refer to measurements in the flat-laid state. Examples of articles in the flat-laid state are shown in Figs. 1 to 4. "Laminate" refers to elements that are secured together in a layered arrangement.
The use of the term "layer" can refer to, but is not limited to, any type of substrate, such as a woven web, non-woven web, films, laminates, composites, elastomeric materials, or the like. A layer can be liquid and air permeable, permeable to air but impermeable to liquids, impermeable to both air and liquids, or the like. When used in the singular, it can have the double meaning of a single element or of a majority of elements.
The crotch portion of the absorbent article preferably includes opposite longitudinal side portions that includes a pair of elastically made, longitudinally-extending, "leg cuffs." The leg cuffs are generally adapted to fit around the legs of a wearer during use and serve as a mechanical barrier to the lateral flow of body secretions. The leg cuffs are made elastic by leg elastics. The trouser diaper may further comprise a front waist elastic and a rear waist elastic. Materials suitable for use in forming leg elastics are known in the prior art. Examples of such materials are bundles or ribbons of a polymer, elastomeric material that is attached to the pant diaper at the leg cuff in an elongated state, or that is attached to the pant diaper while the pant diaper is pleated, so that elastic contracting forces are transferred to the " leg cuff. Examples of suitable elastomeric materials that can be used include polyether-polyamide block copolymers, polyurethanes, synthetic linear ABA and AB block copolymers, chlorinated rubber / EVA (ethylene-vinyl acetate) blends, EPDM (ethylene-propylene diene monomer) rubbers, EPM ( ethylene-propylene monomer) rubbers, blends of EPDM / EPM / EVA, and the like. "Liquid" means a non-gaseous substance and / or a material that flows and can take the inner form of a container into which it is poured or placed. "Longitudinal" is a direction parallel to the maximum linear dimension of the article .
The term "meltblown fibers" means fibers formed by extrusion of a molten thermoplastic material through a plurality of fine, usually circular, die capillaries into molten wires or filaments in a high-speed gas stream (e.g. air) which causes the filaments of the molten thermoplastic material will decrease in diameter, which can go to a microfiber diameter. Generally, meltblown fibers have an average fiber diameter of up to about 10 microns. After the formation of the fibers, the meltblown fibers are carried by the high speed gas stream and deposited on a collecting surface to form a web of randomly arranged meltblown fibers.
The term "non-elastic" refers to any material that does not fall within the definition of "elastic" above.
The term "non-woven fabric or web" means a sheet of material that has a structure of individual fibers or threads that are inlaid, but not in a regular manner such as occurs with stitching or weaving processes. Non-woven fabrics or webs can be made by many processes, such as meltblown processes, spunbond processes, and bound carded web processes. "Pants body" refers to a garment that has a waist opening and a pair of leg openings, similar to shorts, swimwear, or the like. The garment described may or may not have a manually tearable side seam.
The terms "particle", "particles", "particle," particles "and the like mean that the material is generally in the form of individual units. The units may be granules, powder, spheres, pulverized materials or The particles may be in any desired shape such as, for example, cubic, rod-like, polygonal, spherical or semi-spherical, rounded or semi-rounded, angular, irregular, etc. size / smallest size ratio, such as needles, flakes, and fibers, are also contemplated to be included herein The terms "particle" or "particle" may also include an agglomerate comprising more than one individual particle, particle, or the like. a particle, particle or any agglomerate desired therefrom, are composed of more than one type of material.
The term "polymer" generally includes, but is not limited to, homopolymers, copolymers, for example, block, graft, random and alternating Copolymers, terpolymers, etc., and mixtures and derivatives thereof. Furthermore, unless otherwise specifically limited, the term "polymer" will encompass all possible geometric configurations of the material. These configurations include, but are not limited to, isotactic, syndiotactic and random symmetries.
By the term "prepackaged" as used herein, it is meant that one or more absorbent articles are packaged in a single unit before being stacked. "Pulp fluff" or "fluff pulp" refer to a material made up of cellulose fibers. The fibers can be either natural or synthetic, or a combination thereof. The material is typically low in weight and has absorbent properties. "Reclosable" refers to the property of two elements that are capable of reversibly attaching, separating, and further being reversibly attached without substantial permanent deformation or cracking.
The "retention portion" or "liquid absorption layer" is part of the absorbent medium. This portion may comprise a matrix of hydrophilic fibers, such as a web of cellulose fluff mixed with particles of high absorption material. In particular arrangements, the retention portion may comprise a mixture of superabsorbent hydrogel forms, particles and synthetic polymer, meltblown fibers, or a mixture of superabsorbent particles with a fibrous coform material comprising a mixture of natural fibers and / or synthetic polymer fibers. includes. The superabsorbent particles can be mixed substantially homogeneously with the hydrophilic fibers, or can be mixed non-uniformly. For example, the concentrations of superabsorbent particles can be arranged in a non-stepwise gradient through a substantial portion of the thickness of the absorbent structure, with lower concentrations to the body side of the absorbent structure and relatively higher concentrations to the outside of the absorbent structure. The superabsorbent particles can also be arranged in a generally discrete layer within the matrix of hydrophilic fibers. In addition, two or more different kinds of superabsorbent materials can be selectively arranged at different locations within or according to the fiber matrix.
As used herein, the term "sheet" or "sheet material" refers to woven materials, non-woven webs, polymer films, polymeric gauze-like materials, and polymeric foam layers.
The absorbent article can also include side panels. The "side panels" may have any shape such as, but not limited to, a square, rectangular, triangular, circular, and stair-like shape. They can be attached to the respective opposite side portions of the rear region, by a known method, such as heat sealing or adhesive bonding. The side panels can also be integrally formed with the rear area by projecting outwardly and connecting the respective topsheet and / or backsheet and / or absorbent medium in lobes which are in the form of the side panels. Preferably, the side panels are formed by laminating a layer of a non-woven fabric, a layer of a thermoplastic film and a layer of an elastic material. The layer of the elastic material can be positioned between the non-woven fabric layer and the thermoplastic film using adhesive layers. The layer of the non-woven fabric can be made from natural fibers, synthetic fibers or a blend of natural fibers and synthetic fibers. The layer of the thermoplastic film can be made of polyethylene or polypropylene.
The term "spunbonded fibers" refers to fibers formed by extrusion of molten thermoplastic polymers in the form of filaments or fibers from a majority of relatively fine, usually circular, capillaries of a spinneret, after which the extruded filaments> quickly ... be drawn through an eductive or other known draw mechanism to provide the filaments with molecular orientation and physical strength. The average diameter of spunbond fibers is typically in the range of 15-60 µm or higher. The spinneret can either be a large spinneret that has several thousands of holes per meter width or can be banks of smaller spinnerets comprising, for example, only 40 holes.
The term "spunbond meltblown spunbond" (SMS) non-woven fabric as used herein refers to a multilayer composite sheet comprising a web of meltblown fibers sandwiched between and bonded to two spunbond layers. An SMS non-woven fabric can be formed in line by successively providing a first layer of spunbonded fibers, a layer of meltblown fibers, and a second layer of spunbonded fibers on a moving porous collected surface. The assembled layers can be bonded by allowing them to pass through a narrowing formed between two rollers that can be heated or unheated and smooth or patterned. Alternatively, the individual spunbond and meltblown layers may be formed in advance and optionally bonded and collected individually such as by winding the fabrics on rolls. The individual layers can then be assembled and bonded at a later time to form an SMS non-woven fabric. Additional spunbond and / or meltblown layers may be incorporated into the SMS fabric, for example spunbond meltblown meltblown spunbond (SMMS), etc. "Staple fibers" refer to commercially available fibers that include diameters ranging from less than about 0.001 mm to more than about 0.2 mm; they come in many different forms such as short fibers ranging from about 10 to 50 mm in length and long fibers with a length greater than 50 mm, preferably up to 100 mm.
By "elongation" is meant that the material has the capacity to extend beyond its original size in at least one dimension when subjected to a tensile force (ie, tension) applied in the direction of that dimension, without the material being break. An extension of for example 50% means that the material with a first length of 100 mm has reached a length of 150 mm. The rack can be in one direction, two directions, or multiple directions. The specific stretching properties of a material can vary along any stretch vectors. The term may include elastic materials, as well as nonwovens that are inherently extensible, but not necessarily in an elastic manner. Such nonwovens can be made to behave in an elastic manner by attaching them to elastic films.
The use of the term "substrate" includes, but is not limited to, woven or non-woven webs, porous films, ink permeable films, paper, composite structures, or the like.
Superabsorbent materials suitable for use in the present invention are known in the art, and may exist in any workable form, such as in particle form, fibers, and mixtures thereof. Generally speaking, the "superabsorbent material" may be a water-swellable, generally water-insoluble, hydrogel-forming polymeric absorbent material, capable of at least about 15, suitably about 30, and possibly about 60 times or more of its weight in physiological salt solution (e.g. a saline solution with 0.9% weight of NaCl). The superabsorbent material can be biodegradable or bipolar. The hydrogel-forming polymeric absorbent material may be formed from organic hydrogel-forming polymeric material, which may include natural material such as agar, pectin and guar gum; modified natural materials such as carboxymethyl cellulose, carboxyethyl cellulose and hydroxypropyl cellulose; and synthetic hydrogel-forming polymers. Synthetic hydrogel-forming polymers include, for example, alkali metal salts of polyacrylic acid, polyacrylamide, polyvinyl alcohol, ethylene maleic anhydride copolymers, polyvinyl ethers, polyvinyl morpholinone, polymers and copolymers of vinyl sulfonic acid, polyacrylates, polyacrylamide, polyvinyl pyridine, and the like. Other suitable hydrogel-forming polymers include hydrolyzed acrylonitrile grafted starch, acrylic acid grafted starch, and isobutylene maleic anhydride copolymers and mixtures thereof. The hydrogel-forming polymers may be slightly cross-linked to make the material substantially water-insoluble. Cross-linking can, for example, be done by radiation or covalent, ionic, Van der Waalse, or hydrogen bonds. The superabsorbent material may suitably be applied to a designated storage or retention portion of the absorbent system, and may optionally be employed in other components or portions of the absorbent article. The superabsorbent material may be included in the absorbent layer or other liquid storage layer of the absorbent article of the present invention in an amount of up to about 60% by weight. Typically, the superabsorbent material, when present, will be provided in an amount from about 5% to about 4% by weight based on the total weight of the absorbent layer. "Superabsorbent polymer particles" or "SAPs" refer to water-swellable, water-insoluble organic or inorganic materials that are capable of, in the most favorable conditions, at least about 10 times their weight, or at least about 15 times their weight, or at least about Be able to absorb 25 times their weight in an aqueous solution comprising 0.9 weight percent sodium chloride. In absorbent articles such as diapers, incontinence diapers, etc., the particle size typically ranges between 100 to 800 µm, preferably between 300 to 600 µm, more preferably between 400 to 500 µm.
The term "target area" refers to an area of an absorbent core where it is particularly desirable to have the majority of a fluid fiction, such as urine, menstrual secretions, or bowel movement, initially contacted. In particular, a target target area, for an absorbent core with one or more fluid target points during use, refers to the area of the absorbent core that extends over a distance equal to 15% of the total length of the composite from each target point in both directions. "Tension" includes a force along one axis that attempts to cause the elongation of a body or the balancing force within that body that attempts to withstand the elongation.
As used herein, the term "thermoplastic" is intended to describe a material that softens when exposed to heat and that substantially returns to its original state when cooled to room temperature.
The term "topsheet" refers to a liquid permeable material that forms the inner cover of the absorbent article and which is placed in direct contact with the wearer's skin during use. The topsheet is typically used to help isolate the wearer's skin from liquids trapped in the absorbent structure. The topsheet may include a non-woven material, e.g., spunbond, meltblown, carded, water-entangled, wet-laid, etc. Suitable non-woven materials may be composed of artificial fibers such as polyester, polyethylene, polypropylene, etc. viscose, artificial silk, etc. or natural fibers, such as wood pulp or cotton fibers, or of a mixture of natural and artificial fibers. <The topsheet material can further be composed of two fibers, which can be bonded together in a bonding pattern. Further examples of topsheet materials are porous foams, perforated plastic films, laminates of non-woven materials and perforated plastic films etc. The materials suitable as topsheet materials should be soft and non-irritating to the skin and should be easily penetrating to body fluid, e.g. urine or menstrual fluids. The topsheet may further be different in different parts of the absorbent article. The topsheet fabrics can be composed of a substantially hydrophobic material, and the hydrophobic material can optionally be treated with a surfactant or otherwise processed to achieve a desired level of wettability and hydrophilicity.
As used herein, the terms "transversal" or "lateral" refer to a line, axis, or direction that is within the plane of the absorbent article and is generally perpendicular to the longitudinal direction. "Ultrasonic welding" refers to a technology that joins two materials together by melting them with heat generated by ultrasonic oscillation and then laminating them together such that the molten materials flow and the space goes between the two untreated portions of the two respective materials filling up. When cooling and forming, the two materials are connected together.
As used herein, the term "water-swellable, water-insoluble" is intended to refer to a material that, when exposed to an excess of water, swells to its equilibrium volume but does not dissolve in the solution. For example, a water-swellable, water-insoluble material generally retains its original identity or physical structure during absorption of the water, but in a highly expanded state, so it must have sufficient physical integrity to withstand current and fusion with neighboring particles. resist.
By the term "packaging material" as used herein is meant a flexible material, preferably a sheet material whose thickness is smaller, preferably much smaller, than its width or length, such as a sheet, a film or a film.
In a particularly preferred embodiment, the above-mentioned packaging material can be rolled up.
Due to the high concentrations of superabsorbent particles or other high-absorption material in the retention portion, there may be an increased difficulty in retaining the high-absorption particles within the retention portion and limiting the movement or migration of superabsorbent materials to the body side of the pants diaper. To improve the retention of the high-absorption material, the absorbent structure may comprise an improved outer package, such as an "envelope sheet", immediately placed adjacent to and around the retention portion. The wrapping sheet is preferably a layer of absorbent material that covers most of the body side and outside surfaces of the retention portion, and preferably substantially encloses all peripheral edges of the retention portion such that a substantially full envelope is formed around it. Alternatively, the wrapping sheet may be provided with an absorbent cover that covers most of the body side and outside surfaces of the retention portion, and substantially encloses only the lateral side edges of the retention portion. Accordingly, both the linear and inwardly bent portions of the lateral side edges of the envelope sheet would be closed around the retention portion. In such an embodiment, however, the end edges of the wrapping sheet would not be completely closed around the end edges of the retention portion to the waistband regions of the article. The wrapping sheet may include a multi-element wrapping sheet comprising a separate body-side wrapping layer and a separate outer-wrapping layer, each extending beyond all or some of the peripheral edges of the retention portion. Such an envelope sheet configuration may, for example, facilitate the formation of a substantially complete cover and closure around the peripheral edges of the retention portion. The body side and outside layers of the wrapping sheet may be substantially composed of the same materials, or may be composed of different materials.
The outer layer of the wrapping sheet may, for example, be composed of a relatively lower weight-base material that has a relatively high porosity, such as a wet-strength cellulose fabric composed of softwood pulp. The body side layer of the wrapping sheet may comprise any of the previously described wrapping fabric materials which have a relatively low porosity (may include, for example, a meltblown web composed of meltblown polypropylene fibers or a low porosity cellulose web composed of a mixture of hardwood / softwood fibers). The low porosity body side layer can help in better preventing migration of superabsorbent particles to the wearer's skin and the high porosity, low weight outer layer layer can help reduce costs.
An absorbent article refers to devices that absorb and retain liquid, and more specifically refers to devices that are placed against or in proximity to the wearer's body to absorb and retain the various secretions discharged by the body. The absorbent articles include, but are not limited to, diapers, adult incontinence briefs, training pants, diaper holders and liners, sanitary napkins, and the like, as well as surgical dressings and sponges.
Preferably, an absorbent article comprises a longitudinal axis and a transverse axis perpendicular to the above-mentioned longitudinal axis. The longitudinal axis is hereby conventionally chosen in the front-to-back direction of the article when reference is made to the article being carried, and the transversal axis is conventionally selected in the left-to-right direction of the article when being referred to the article being worn. Disposable absorbent articles may include a liquid permeable topsheet, a backsheet connected to the topsheet, and an absorbent core positioned and held between the topsheet and the backsheet. The topsheet is effectively permeable to the liquids intended to be retained or stored by the absorbent article, and the backsheet may or may not be substantially impermeable or otherwise effectively impermeable to the intended liquids. The absorbent article may include other components such as liquid-absorbing layers, acquisition and distribution layers, liquid winding layers, liquid recording layers, transfer layers, barrier layers, packaging layers, wrapping sheets and the like, as well as combinations thereof.
A garment means any type of clothing that can be worn. This includes diapers, training pants, incontinence products, surgical gowns, industrial work clothes and covers, underwear articles, pants, shirts, jackets and the like. The term "underwear article" refers to a garment that is typically worn among other garments and that is intended to make direct contact with the wearer's body. "Incontinence pants diapers" or "pants diapers", as used herein, refer to disposable articles of clothing, more particularly absorbent underwear articles, which have a waist opening and leg openings designed for incontinent persons. A pants diaper can be applied to the wearer by inserting the wearer's legs into the leg openings and sliding the pant diaper into position around the wearer's lower torso. A pant diaper can be preformed by any suitable technique including, but not limited to, securing two portions of the article using resealable and / or non-resealable connections (e.g., seam, weld, adhesive, cohesion bond, fastener, etc.). A trouser diaper can be preformed anywhere along the perimeter of the item (eg, attached to the side, attached to the front waist). While the terms "pant diaper" or "pant diaper" are used herein, pant diapers are also commonly referred to as "closed diapers", "preformed diapers", "pull-on diaper" and "diaper pants".
An absorbent article, such as a pant diaper, preferably includes a front region (F), also called "front section", "front waistband region", "front section" or similar, a rear region (B), also "back region", "rear section", " termed "rear waistband region", "rear portion" or the like, and an intermediate crotch area (C) or "crotch portion" interconnecting the front and back regions. When used herein, the reference to a "front" portion refers to that portion of the pant diaper that is generally positioned at the front of an incontinent person during use. The reference to the "back" or "back" portion refers to the portion of the diaper that is generally positioned on the back of the incontinent person during use, and reference to the "crotch" portion refers to that portion that is generally is positioned between the legs of an incontinent person during use. The crotch region is an area where fluid mictures typically occur repeatedly.
Preferably, a pant diaper comprises an outer surface, an inner surface opposite to the outer surface, and a periphery defined by the outer edges of the pant diaper, said outer edges include side edges (6, 7) extending substantially along a longitudinal direction and transversely opposite edges of the trouser diaper, and define a front-end edge and a rear-end edge that substantially extend along the transverse direction and which define longitudinally opposite edges of the trouser diaper.
The inner surface of the trouser diaper preferably consists of that portion of the trouser diaper that is placed against the wearer's body during use, i.e. the inner surface is generally covered by at least a portion of the topsheet. , and other components attached to the topsheet, formed. The outer surface preferably consists of that portion of the pant diaper that is positioned away from the wearer's body, i.e. the outer surface is generally formed by at least a portion of the backsheet and other components attached to the backsheet. The front area extends from the front-end edge of the periphery to a lateral center line or transverse axis of the pant diaper. The rear area extends from the rear end edge of the periphery to a lateral center line or a transverse axis of the pant diaper. The crotch area connects the rear area and the front area across the transversal axis.
Preferably, an absorbent article such as a pant diaper comprises a liquid-permeable topsheet (2), a liquid-impermeable backsheet (3), and an absorbent medium (4) suitable between the topsheet and the backsheet. The topsheet, the backsheet and the absorbent medium can be made of any suitable material known to a person skilled in the art. The topsheet is generally positioned on or close to the body side surface of the article, while the backsheet is generally positioned on or close to the article side surface of the article. Optionally, the topsheet may be provided on or close to the body side surface of the article and at least partially on or close to the garment side surface of the article, e.g., by wrapping the topsheet around the absorbent medium and / or the backsheet. Optionally, the article may comprise one or more separate layers additionally to the backsheet and positioned between the backsheet and the absorbent medium. The topsheet and backsheet are connected or associated together in an effective way. Preferably, the topsheet and the backsheet are adhered to each other at or close to the side edges and / or front and / or rear end edges of the absorbent article. The absorbent medium preferably comprises absorbent material optionally attached to or packaged in one or more covering sheets or wrapping sheets. Examples of commonly occurring absorbent materials are cellulose fluff pulp, tissue layers, highly absorbent polymers (so-called super-absorbent polymer particles (SAP)), absorbent foam materials, absorbent non-woven materials or the like and any combination thereof. It is common to combine cellulose fluff pulp with superabsorbent polymers in an absorbent material.
Preferably, an absorbent article such as a pant diaper comprises a chassis that refers to a fundamental constituent of the absorbent article on which the remainder. of the structure of the article. is constructed or transferred, e.g., in a pant diaper, the structural elements that, when configured to wear, give the pant diaper its shape, such as a backsheet, a topsheet, or a combination of a topsheet and a backsheet, preferably the chassis comprises a laminate comprising a topsheet, a backsheet and an absorbent medium between the topsheet and the backsheet.
Preferably, a pant diaper includes inclusion flaps or barrier cuffs. The inclusion flaps are generally considered to be particularly suitable for the containment of faecal matter and to prevent the lateral flow of liquid waste until the liquid waste can be absorbed by the absorbent article. Many constructions of containment flaps are known. Such containment flaps generally consist of a proximal edge intended to be attached to the absorbent article, preferably to or near the side edges and / or the front and / or rear edge of the pant diaper, and an opposite distal edge that extends over the is generally not attached to the absorbent article along at least a portion of its length. An elastic member is generally located adjacent the distal edge to help maintain the containment flap in an upright condition and to maintain a sealing contact between the distal edge of the containment flap and a wearer's body during use. The elastic member is generally positioned between two layers of material so that the elastic does not come into contact with the body of a wearer. The containment flaps can be made from a wide variety of materials such as polypropylene, polyester, artificial silk, nylon, foam, plastic films, molded films, and elastic foams. Various production techniques can be used to manufacture the containment flaps. For example, the containment flaps can be woven, non-woven, spunbond, carded, cast, blown, or the like.
Preferably because a pant diaper leg containment gaskets. Leg "containment packs" help prevent leakage of bodily secretions when the wearer exerts compressive forces on the absorbent article. In particular, the stiffness of the leg containment gaskets prevents twisting and bundling of the leg openings of the absorbent article which can lead to leakage. In addition, the elasticity and malleability of the leg containment gaskets ensure that the body facing surface of the leg containment gaskets form a suitable seal against the wearer's body. The physical properties of the leg containment gaskets, such as thickness and rigidity, also function to keep the topsheet and absorbent core away from the wearer's body during use. Thus, an empty volume is created between the wearer's body and the topsheet and absorbent core of the absorbent article to help retain body secretions.
Preferably, a pant diaper comprises a pair of elastically made, longitudinally-extending leg cuffs that can be at least partially attached to the opposed longitudinal side portions of the crotch portion positioned close to the side edges of the pant diaper. The leg cuffs are generally adapted to fit around the legs of a wearer during use and serve as a mechanical barrier to the lateral flow of body secretions. The leg cuffs are preferably made elastic by leg elastics. Preferably, a pant diaper comprises a front waist elastic in the front area and / or a rear waist elastic in the rear area, said front and / or rear waist elastic allows elastic to stretch the front and / or rear area in at least the transverse direction, respectively. Materials suitable for use in shaping leg and / or waist elastics are known in the prior art. Examples of such materials are bundles or ribbons of a polymer, elastomeric material that is attached to the pant diaper, e.g., at the leg cuff in a stretched state, or that is attached to the pant diaper while the pant diaper is pleated, so that elastic contracting forces are transmitted on the leg cuff or front and / or back elastic. Examples of suitable elastomeric materials that can be used include polyether polyamide block copolymers, polyurethanes, synthetic linear ABA and AB block copolymers, chlorinated rubber / EVA (ethylene-vinyl acetate) blends, EPDM (ethylene-propylene diene monomer) rubbers, EPM (ethylene-propylene monomer) rubbers, blends of EPDM / EPM / EVA, and the like.
The pants diaper can also include side panels. The "side panels" may have any shape such as, but not limited to, a square, rectangular, triangular, circular, and stair-like shape. They can be attached to the respective opposite side portions of the rear region, by a known method, such as heat sealing or adhesive bonding. The side panels can also be integrally formed with the rear area and / or front area by projecting outwardly and connecting the respective topsheet and / or backsheet and / or absorbent medium in lobes which are in the form of the side panels.
The side panel is preferably formed by laminating a layer of a non-woven fabric, ... a layer of a thermoplastic film and a layer of an elastic material. The layer of the elastic material can be positioned between the non-woven fabric layer and the thermoplastic film using adhesive layers. The layer of the non-woven fabric can be made from natural fibers, synthetic fibers or a blend of natural fibers and synthetic fibers. The layer of the thermoplastic film can be made of polyethylene or polypropylene.
Preferably, a trouser diaper comprises fastening means which can be provided on the rear waistband area and / or the front waistband area of the trouser diaper to secure the front area to the rear area such that the trouser diaper acquires a shape suitable for being worn by a wearer such as e.g. underwear (see e.g. fig. 5). Preferably, the above-mentioned pant diaper comprises permanent and / or semi-permanent fasteners, such as adhesives, weld seams, ultrasonic weld seams, thermal weld seams, thermo-sealing weld seams. Alternatively or additionally, the above pants diaper includes reclosable fasteners, such as tape tape fasteners, snaps, pins, belts, hooks, buckles, "hook / mushroom" and loop fasteners (e.g., VELCRO® type fasteners) and the like or any other combination thereof, which can be provided on the lateral side edges of the rear and / or front waistband region of the pant diaper to provide a mechanism for keeping the pant diaper in a pant diaper shape.
In the following, the invention and further embodiments are described with references to the figures.
In a first aspect, the present invention provides a disposable absorbent underwear article (1) suitable to be worn around the lower torso of a wearer, comprising a liquid-permeable topsheet (2) on a body-facing side, a liquid-impervious side backsheet (3) on a garment-turned side, an absorbent core (4) between the topsheet and the backsheet; a chassis comprising a laminate (5) comprising the topsheet, the backsheet and the core; the underwear article (1) has a front section (F), a rear section (B) and a cross section (C) positioned between the front section and the rear section; a longitudinal axis (L) from the front section across the cross section to the rear section and a transverse axis (T) in the cross section that is perpendicular to the longitudinal axis; the underwear article further comprises transversely opposite first (6) and second (7) leg opening determining edges, said first and second Joeer opening determining edges. furthermore a crotch width in the crotch section, said front section includes transversely opposite first (8) and second (9) front section edges, which define a front section width, and said rear section includes transversely opposite first (18) and second (19) rear section edges, which define a rear section width, the aforementioned crotch width, front section width, and back section width are measured in a transverse direction when the underwear article is elastically stretched in an essentially flat-laid state, as shown in Figs. 1-4; wherein said front section comprises a front elastic waistband (10) and said rear section comprises a rear elastic waistband (11), each of said elastic waistbands (10, 11) being stretchable in at least the transversal direction; wherein said front section and said rear section can essentially be stretched elastically to a maximum front section width (12) and a maximum rear section width (13), each of. the above-mentioned maximum widths being greater than a minimum cross-width (14) by a factor of at least 1.0, such as 1.01, 1.02, 1.03, 1.04, 1.05, 1.06, 1.07, 1.08, 1.09, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19, 1.20, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, 1.30, 1.31, 1.32, 1.33, 1.34, 1.35, 1.36, 1.37, 1.38, 1.39, 1.40, 1.41, 1.42, 1.43, 1.44, 1.45, 1.46, 1.47, 1.48, 1.49 or any value between them, preferably at least 1.5, such as 1.51, 1.52, 1.53, 1.54, 1.55, 1.56, 1.57, 1.58, 1.59, 1.60, 1.61, 1.62 , 1.63, 1.64, 1.65, 1.66, 1.67, 1.68, 1.69, 1.70, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79 or any value in between, more preferably at least 1.8, such as 1.81, 1.82 , 1.83, 1.84, 1.85, 1.86, 1.87, 1.88, 1.89 or any value between them, even more preferably at least 1.9, such as 1.91, 1.92, 1.93, 1.94, 1.95, 1.96, 1.97, 1.98, 1.99 or any value between them. , even more preferably at least 2.0, such as 2.01, 2.02, 2.03, 2.04, 2.05, 2.06, 2.07, 2.08, 2.09 or any other value between them, even more preferably at least 2.1, such as 2.11, 2.12, 2.13, 2.14, 2.15, 2.16, 2.17, 2.18, 2.19 or any other value, even more preferably at least 2.2, such as 2.21, 2.22, 2.23, 2.24 or any value between them, even more preferably more than 2.25, such as 2.26, 2.27, 2.28, 2.29, 2.30, 2.31, 2.32, 2.33, 2.34, 2.35, 2.36, 2.37, 2.38, 2.39, 2.40, 2.41, 2.42, 2.43, 2.44, 2.45, 2.46, 2.47, 2.48, 2.49, 2.50, 2.51, 2.52, 2.53, 2.54, 2.55, 2.56, 2.57, 2.58, 2.59, 2.60, 2.61, 2.62, 2.63, 2.64, 2.65, 2.66, 2.67, 2.68, 2.69, 2.70, 2.71, 2.72, 2.73, 2.74, 2.75, 2.76, 2.77, 2.78, 2.79, 2.80, 2.81, 2.82, 2.83, 2.84, 2.85, 2.86, 2.87, 2.88, 2.89, 2.90, 2.91, 2.92, 2.93, 2.94, 2.95, 2.96, 2.97, 2.98, 2.99, 3.00 or any value in between or greater. The underwear article thus provided combines an optimal absorption capacity with an optimal and discreet fit for the wearer, simultaneously limiting the total production costs. "
In a preferred embodiment, the aforementioned front elastic waistband (10) and the aforementioned rear elastic waistband (11) become capable of forming a substantially continuous elastic waistband (15) when the underwear article is worn, the first front section edge (8) being connected to the first rear section edge (18) and the second front section edge (9) is connected to the second rear section edge (19). An essentially continuous elastic waistband allows the tension of the waistband around the wearer's torso to be evenly distributed, thereby improving the comfort of the wearer and the risk of breakage of the waistband due to a local high tension, reducing . Further, a underwear article comprising a continuous elastic waistband by connecting the first front section edge to the first rear section edge and connecting the second front section edge to the second rear section edge can be more easily put on or off without breaking or without releasing the bonds between front section and rear section.
In a preferred embodiment, the front section is connected to the rear area with a, preferably substantially permanent, suture (16), preferably wherein the first front section edge (8) is connected to the first rear section edge (18) and the second front section edge (9) is connected with the second rear section edge (19), preferably the aforementioned substantial permanent bond (17) comprises an ultrasonic bond, an adhesive bond, a thermal bond and / or a thermomechanical bond.
In one embodiment, the laminate (5) comprises transversely opposite first (20) and second (21) laminate edges that are substantially straight, and preferably substantially parallel, and wherein the underwear article comprises side panels (22, 23, 24, 25) provided on the laminate in the front and / or rear section and extending beyond the first and / or second laminate edges, preferably two side panels attached to the front section, a first front side panel (22) extending beyond the first laminate edge (20) and a second front side panel (23) extending beyond the second laminate edge (21), and two side panels attached to the rear section, a first rear side panel (24) extending beyond the first laminate edge (20) and a second rear side panel (25) extending beyond the second laminate edge (21), thereby ensuring that each of the aforementioned maximum front width (12) and the aforementioned rear width (13) is greater than the minimum cross width (14) with above said factor, yes, at least. 1, 0, more, preferably at least 1.5, even more preferably at least 1.8, even more preferably at least 1.9, even more preferably at least 2.0, even more preferably at least 2.1, even more preferably at least 2.2.
In such a configuration, no material is lost during cutting of the laminate which can be provided on a substantially endless support means, e.g. a conveyor belt, in the form of a substantially endless cover with a fixed width. A well-fitting underwear article comprising the stated ratios of maximum front width to minimum crotch width and maximum rear width to minimum crotch width is hereby obtained by attaching side panels to the first and second laminate edges. The stated preferred ratios can be achieved by providing side panels with different dimensions, rather than providing laminates with different dimensions. The absence of material loss and the possibility of using one type of laminate to manufacture underwear articles with different preferred ratios from maximum front width to minimum crotch width and maximum rear width to minimum crotch width, results in a substantial reduction in production costs, in particular in a large volume production facility.
In a preferred embodiment, one or more side panels comprise elastic means (26), such as elastic members or an elastic laminate, to make the side panels stretchable in at least the transverse direction. Such side panels allow to obtain a substantially continuous waistband (15) when the underwear article is worn and / or when the front section is connected to the rear section with their respective first and second edges.
In a preferred embodiment, at least one of the above-mentioned side panels comprises a side panel height, which is measured along a longitudinal direction, the above-mentioned side panel height varies depending on a transversal distance of the above-mentioned laminate, preferably the above-mentioned side panel height varies between a maximum side panel height (27) and a minimum side panel height (28). comprising a maximum-to-minimum side panel height ratio of at most 2.5, such as 2.49, 2.48, 2.47, 2.46, 2.45, 2.44, 2.43, 2.42, 2.41, 2.40, 2.39, 2.38, 2.37, 2.36, 2.35, 2.34, 2.33, 2.32, 2.31, 2.30, 2.29, 2.28, 2.27, 2.26, 2.25, 2.24, 2.23, 2.22, 2.21, 2.20, 2.19, 2.18, 2.17, 2.16, 2.15, 2.14, 2.13, 2.12, 2.11, 2.10, 2.09, 2.08, 2.07, 2.06, 2.05, 2.04, 2.03, 2.02, 2.01 or any value between them, preferably at most 2.0, such as 1.99.1.98, 1.97.1.96, 1.95, 1.94, 1.93.1.92, 1.91 or any value between them, more preferably at most 1.9, such as 1.89, 1.88, 1.87, 1.86, 1.85, 1.84, 1.83, 1.82, 1.81 or "any value in between, more preferably, at most 1.9, such as 1.89. 1.88, 1.87, 1.86, 1.85, 1.84, 1.83, 1.82, 1.81 or any value between them, even more preferably 1.8, such as 1.79, 1.78, 1.77, 1.76, 1.75, 1.74, 1.73, 1.72, 1.71 or any value between them. , more preferably at most 1.7, and / or preferably the aforementioned maximum-to-minimum side panel height ratio is at least 1.0, such as 1.01, 1.02, 1.03, 1.04, 1.05, 1.06, 1.07, 1.08, 1.09 or any value therebetween, at preferably at least 1.1, such as 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19 or any value therebetween, more preferably at least 1.2, such as 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28 , 1.29, 1.30, 1.31, 1.32, 1.33, 1.34, 1.35, 1.36, 1:37, 1.38, 1.39, 1.40, 1.41, 1.42, 1.43, 1.44, 1.45, 1.46, 1.47, 1.48, 1.49, - 1.50, 1.51, 1.52, 1.53, 1.54, 1.55, 1.56, 1.57, 1.58, 1.59, 1.60, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.67, 1.68, 1.69 or any other value between them.
In one embodiment, the laminate comprises transversely opposite first (29) and second (30) laminate edges cut along at least partially non-parallel paths and / or at least partially curved paths, said laminate edges at least partially defining the first (6) and second ( 7) leg opening defining edges, the first (8) and second (9) front section edges and the first (18) and second (19) rear section edges, the aforementioned laminate edges (29, 30) thereby ensure that each of the above maximum front width (12) and said maximum rear width (13) is greater than the minimum cross width (14) by the above-mentioned factor, ie at least 1.0, preferably at least 1.5, even more preferably at least 1.8, even more preferably at least 1.9, even more preferably at least 2.0, still more preferably at least 2.1, even more preferably at least 2.2.
In such a configuration, no adhesives or bonding techniques are needed to achieve the stated ratios between maximum front / rear width and minimum cross width of the article, resulting in a reduced production time and a lower cost. In order to minimize material loss and at the same time still ensure an optimal fit via optimum maximum front / rear width to minimum cross-width ratios, in a preferred embodiment the above-mentioned cutting of the aforementioned laminate edges is carried out by at most 50% of the backsheet and the laminate topsheet ( 5) to be cut away, such as 49%, 48%, 47%, 46% or any value in between, more preferably at most 45%, such as 44%, 43%, 42%, 41% or any value in between more preferably at most 40%, such as 39%, 38%, 37%, 36%, 35%, 34%, 33%, 32%, 31%, 30%, 29%, 28%, 27%, 26%, 25% 24%, 23%, 22%, 21%, 20%, 19%, 18%, 17%, 16%, or any other value between the backsheet and the top sheet of the laminate. To ensure the possibility of discreetly wearing the underwear article under everyday clothes, in a preferred embodiment, the above-mentioned cutting of the aforementioned laminate edges is performed by at least 1%, such as 2%, 3%, 4% or any value between them, at preferably at least 5%, such as 6%, 7%, 8%, 9% or any value in between, more preferably at least 10%, such as 11%, 12%, 13%, 14% or any value in between, even more preferably cut away at least 15% of the backsheet and the top sheet from the laminate.
In a particularly preferred embodiment, the above-mentioned cutting of the aforementioned laminate edges is carried out along the aforementioned first and second leg opening determining edges, more preferably only along the aforementioned first and second leg opening determining edges. The edges determining leg opening are hereby determined by the laminate edges in the cross section and at least partially in the front section and / or rear section.
In a preferred embodiment, the aforementioned underwear article comprises an hourglass shape, an hourglass shape with straight edges, an hourglass shape with curved edges, a dog bone shape, a polygonal shape, an octagonal shape, a decagonal shape with one or more curved edges.
In one embodiment, the absorbent core (4) comprises a core height (31) along the longitudinal axis (L) of the underwear article, the core comprising transversely opposite first (32) and second (33) core edges that are substantially straight, and preferably be substantially parallel, over a distance of at least 1%, such as 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14 %, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24% or any value in between, preferably at least 25%, such as 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44% , 45%, 46%, 47%, 48%, 49% any value in between, more preferably at least 50%, such as 51%, 52%, 53%, 54%, 55%, 56%, 57 %, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74% or any value therebetween, even more preferably at least 75%, such as 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% , 99%, 100% or any value in between, from the above core height. In a preferred embodiment, the above-mentioned core comprises an essentially rectangular shape. Such a core configuration can be easily produced with little material loss, resulting in lower, production costs,
In one embodiment, the absorbent core (4) comprises a core height along the longitudinal axis (L) of the underwear article between a core front end (34) and a core rear end (35), the core comprising transversely opposite first (36) and second (37) core edges that follow an at least partially non-parallel path and / or an at least partially curved path, the above-mentioned first (36) and second (37) core edges thereby define a transverse core width that has a minimum (38) that is at least 10% of the aforementioned core height is positioned away from the aforementioned core front end and from the aforementioned first core rear end, said first and second core edges preferably define a maximum transverse core width (40), said maximum transverse core width (40) having a maximum-to-minimum-core-width ratio with the above-mentioned minimum transversal core width (38) of at least 1.0, such as 1.01, 1.02, 1.03, 1.04, 1.05, 1.06, 1.07, 1.08, 1.09 or ee any value between them, preferably at least 1.1, such as 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19 or any value between them, preferably at least 1.2, such as 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, 1.30, 1.31, 1.32, 1.33, 1.34, 1.35, 1.36, 1.37, 1.38, 1.39, 1.40, 1.41, 1.42, 1.43, 1.44, 1.45, 1.46, 1.47, 1.48, 1.49 or any other value in between or higher. Such a configuration ensures optimal use of absorbent material, since more absorbent material is positioned in the front and / or rear section where discharges of physical secretions are most likely to occur. In a preferred embodiment, the above-mentioned maximum transversal core width has a maximum-to-minimum core-width ratio with the above-mentioned minimum transversal core width of at most 2.0, such as 1.99, 1.98, 1.97, 1.96, 1.95, 1.94, 1.93, 1.92, 1.91 or any value between them, preferably at most 1.9, such as 1.89, 1.88, 1.87, 1.86, 1.85, 1.84, 1.83, 1.82, 1.81 or any other value between them, more preferably at most 1.8, such as 1.79.1.78, 1.77.1.76, 1.75, 1.74.1.73, 1.72, 1.71 or any value between them, even more preferably at most 1.7, such as 1.69, 1.68, 1.67, 1.66, 1.65, 1.64, 1.63, 1.62, 1.61 or any other value between them, even more preferably at most 1.6, such as 1.59, 1.58, 1.57, 1.56, 1.55, 1.54, 1.53, 1.52, 1.51 or any value between them, even more preferably at most 1.5. Such a configuration makes it possible to carry the article discreetly, while optimum use of the absorbent material is still ensured.
In one embodiment, the absorbent core (4) has a greater width (40) in the rear section than in the front section (39) of the underwear article (1). The rear section. · May be exposed to more physical secretions, especially if the underwear article is worn during the night when the wearer is lying on his back.
In a preferred embodiment, the above core comprises a maximum front core width in or close to the front section and a maximum back core width in or close to the rear section. In one embodiment, the aforementioned maximum front core width is essentially the same as the aforementioned maximum rear core width. In an alternative embodiment, the above-mentioned maximum front-core width is greater than the above-mentioned maximum rear-core width by a factor of 1.01, 1.02, 1.03, - 1.04, 1.05, 1.06, 1.07, 1.08, 1.09, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16 , 1.17, 1.18, 1.19, 1.20, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, 1.30, 1.31, 1.32, 1.33, 1.34, 1.35, 1.36, 1.37, 1.38, 1.39, 1.40, 1.41 , 1.42, 1.43, 1.44, 1.45, 1.46, 1.47, 1.48, 1.49, 1.50, 1.51, 1.52, 1.53, 1.54, 1.55, 1.56, 1.57, 1.58, 1.59, 1.60, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66 1.67, 1.68, 1.69, 1.70, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79, 1.80 or any value between them or greater. In yet another alternative embodiment, the aforementioned maximum rear core width is greater than the aforementioned maximum front core width by a factor of 1.01, 1.02, 1.03, 1.04, 1.05, 1.06, 1.07, 1.08, 1.09, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19, 1.20, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, 1.30, 1.31, 1.32, 1.33, 1.34, 1.35, 1.36, 1.37, 1.38, 1.39, 1.40, 1.41, 1.42, 1.43, 1.44, 1.45, 1.46, 1.47, 1.48, 1.49, 1.50, 1.51, 1.52, 1.53, 1.54, 1.55, 1.56, 1.57, 1.58, 1.59, 1.60, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.67, 1.68, 1.69, 1.70, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79, 1.80 or any value between them or greater.
In one embodiment, the laminate (5) comprises a minimum transverse laminate width (14) and the above-mentioned core comprises a minimum transversal core width (38), the above-mentioned underwear article comprises a laminate-to-core-width ratio determined by the ratio between the above-mentioned minimum transverse laminate width and the above-mentioned minimum transverse core width, which is less than 2.2, such as 2.19, 2.18, 2.17, 2.16, 2.15, 2.14, 2.13, 2.12, 2.11 or any value between them, more preferably less than 2.1, such as 2.09, 2.08, 2.07 , 2.06, 2.05, 2.04, 2.03, 2.02, 2.01 or any value between them, even more preferably less than 2.0, such as 1.99, 1.98, 1.97, 1.96, 1.95, 1.94, 1.93, 1.92, 1.91 or any value between them, even more preferably less than 1.9, such as 1.89, 1.88, 1.87, 1.86, 1.85, 1.84, 1.83, 1.82, 1.81 or any value therebetween, even more preferably less than 1.8, such as 1.79, 1.78, 1.77, 1.76, 1.75 , 1.74, 1.73, 1.72, 1.71, or any other value between them, even more ... preferably less than 1.7, such as 1.69, 1.68, 1.67, 1.66, 1.65, 1.64, 1.63, 1.62, 1.61, 1.60, 1.59, 1.58, 1.57, 1.56, 1.55, 1.54, 1.53, 1.52, 1.51, 1.50, 1.49, 1.48, 1.47, 1.46, 1.45, 1.44, 1.43, 1.42, 1.41, 1.40, 1.39, 1.38, 1.37, 1.36, 1.35, 1.34, 1.33, 1.32, 1.31, 1.30, 1.29, 1.28, 1.27, 1.26, 1.25, 1.24, 1.23, 1.22, 1.21, 1.20, 1.19, 1.18, 1.17, 1.16, 1.15, 1.14, 1.13, 1.12, 1.11, 1.10, 1.09, 1.08, 1.07, 1.06, 1.05, 1.04, 1.03, 1.02, 1.01, 1.00 or any value in between. In a preferred embodiment, the above-mentioned minimum transversal laminate width (14) is positioned about the same position along the longitudinal axis as the above-mentioned minimum transversal core width (38), more preferably within 15% of the core height, even more preferably within 10%, even more preferably within 5% of the core height.
In one embodiment, said laminate (5) comprises a laminate height (44) along the longitudinal axis and said core comprises a core height (31) along the longitudinal axis, said underwear article comprising a laminate-to-core height ratio determined by the ratio between the laminate height and the core height, which is more than 1.0, such as 1.01, 1.01, 1.02, 1.03, 1.04, 1.05, 1.06, 1.07, 1.08, 1.09, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17 , 1.18, 1.19, 1.20, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29 or any value between them, preferably more than 1.3, such as 1.31.1.32.1.33.1.34 or any value between them , more preferably more than 1.35, such as 1.36, 1.37, 1.38, 1.39 or any value between them, even more preferably more than 1.4, such as 1.41, 1.42, 1.43, 1.44 or any value between them, even more preferably more than 1.45, such as 1.46, 1.47, 1.48, 1.49, 1.50, 1.51, 1.52, 1.53, 1.54, 1.55, 1.56, 1.57, 1.58, 1.59, 1.60, 1. 61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.67, 1.68, 1.69, 1.70, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79, 1.80, 1.81, 1.82, 1.83, 1.84, 1.85, 1.86, 1.87, 1.88, 1.89, 1.90, 1.91, 1.92, 1.93, 1.94, 1.95, 1.96, 1.97, 1.98, 1.99, 2.00, 2.01, 2.02, 2.03, 2.04, 2.05, 2.06, 2.07, 2.08, 2.09, 2.10, 2.11, 2.12, 2.13, 2.14, 2.15, 2.16, 2.17, 2.18, 2.19 or any value between them and / or the aforementioned laminate-to-core-height ratio is less than 2.5, such as 2.49, 2.48, 2.47, 2.46, 2.45, 2.44, 2.43, 2.42, 2.41 or any value between them, preferably less than 2.4, such as 2.39, 2.38, 2.37, 2.36, 2.35, 2.34, 2.33, 2.32, 2.31 or any value between them, more preferably less than 2.3, such as 2.29, 2.28, 2.27, 2.26, 2.25, 2.24, 2.23, 2.22, 2.21 or any value between them, even more preferably less than 2.2.
The above ratios allow for further elements, such as elastic means (42), core-forming elements (43) or leg cuffs, to be adhered to the topsheet and / or backsheet, between, the core and the laminate edges and simultaneously the width of limit the laminate in the crotch section so that the underwear article is suitable for discreet wear.
In one embodiment, the underwear article includes containment flaps for the containment of faecal matter and for preventing the lateral flow of liquid waste until the liquid waste can be absorbed by the absorbent article.
In one embodiment, the underwear article comprises elasticized, longitudinally-extending leg cuffs provided at least on the crotch portion of the underwear article close to the aforementioned first and second edges, which are adapted to fit around a wearer's legs during use and which are used as mechanical barrier against the lateral flow of body secretions.
In one embodiment, the aforementioned underwear article comprises a underwear article height (41) along the longitudinal axis that is more than 45 cm, preferably more than 50 cm, more preferably more than 55 cm, even more preferably more than 60 cm, and / or the above height is less than 120 cm, preferably less than 115 cm, more preferably less than 110 cm, even more preferably less than 105 cm, such as 56 cm, 57 cm, 58 cm, 59 cm, 60 cm , 61 cm, 62 cm, 63 cm, 64 cm, 65 cm, 66 cm, 67 cm, 68 cm, 69 cm, 70 cm, 71 cm, 72 cm, 73 cm, 74 cm, 75 cm, 76 cm, 77 cm, 78 cm, 79 cm, 80 cm, 81 cm, 82 cm, 83 cm, 84 cm, 85 cm, 86 cm, 87 cm, 88 cm, 89 cm, 90 cm, 91 cm, 92 cm, 93 cm, 94 cm, 95 cm, 96 cm, 97 cm, 98 cm, 99 cm, 100 cm, 101 cm, 102 cm, 103 cm, 104 cm or any other value between them; and / or the aforementioned underwear article comprises a minimum underwear article width that is more than 10 cm, preferably more than 11 cm, more preferably more than 12 cm, and / or the above-mentioned minimum underwear article width is less than 40 cm, preferably less than 36 cm, more preferably less than 33 cm, such as 13 cm, 14 cm, 15 cm, 16 cm, 17 cm, 18 cm, 19 cm, 20 cm, 21 cm, 22 cm, 23 cm, 24 cm, 25 cm, 26 cm, 27 cm, 28 cm, 29 cm, 30 cm, 31 cm, 32 cm or any other value between them; and / or the aforementioned underwear article comprises a maximum underwear article width that is more than 35 cm, preferably more than 40 cm, more preferably more than 45 cm, even more preferably more than 50 cm even more preferably more than 55 cm and / or the aforementioned maximum underwear article width is less than 130 cm, preferably less than 120 cm, preferably less than 110 cm, such as 56 cm, 57 cm, 58 cm, 59 cm, 60 cm, 61 cm, 62 cm 63 cm, 64 cm, 65 cm, 66 cm, 67 cm, 68 cm, 69 cm, 70 cm, 71 cm, 72 cm, 73 cm, 74 cm, 75 cm, 76 cm, 77 cm, 78 cm, 79 cm, 80 cm, 81 cm, 82 cm, 83 cm, 84 cm, 85 cm, .86 cm, 87 cm, 88 cm, 89 cm, 90 cm, 91 cm, 92 cm, 93 cm, 94 cm, 95 cm, 96 cm, 97 cm, 98 cm, 99 cm, 100 cm, 101 cm, 102 cm, 103 cm, 104 cm, 105 cm, 106 cm, 107 cm, 108 cm, 109 cm or any other value between them.

权利要求:
Claims (15)
[1]
CONCLUSIONS
A disposable absorbent underwear article comprising: a liquid-permeable topsheet on a body-turned side, a liquid-impermeable backsheet on a garment-turned side, an absorbent core between the topsheet and the backsheet; a chassis comprising a laminate comprising the topsheet, the backsheet and the core; the underwear article has a front section, a rear section and a cross section positioned between, the. front section and. the rear section; a longitudinal axis from the front section across the crotch section to the rear section and a transverse axis in the crotch section that is perpendicular to the longitudinal axis; the underwear article further comprises transversely opposite first and second leg opening determining edges, said first and second leg opening determining edges further define a crotch width in the crotch section, said front section comprising transversely opposite first and second front section edges, which define a front section width, and said rear section including transversely opposite first and second rear section edges, which define a rear section width, the aforementioned crotch width, front section width, and rear section width are measured in a transverse direction when the underwear article is elastically stretched in an essentially flat-laid state; wherein said front section comprises a front elastic waistband and said rear section comprises a rear elastic waistband, each of said elastic waistbands being stretchable in at least the transverse direction; wherein said front section and said rear section can essentially be stretched elastically to a maximum front section width and a maximum rear section width, each of said maximum widths being greater than a minimum crotch width by a factor of at least 1.0, characterized in that the absorbent core in the rear section of the underwear article has a greater width than the absorbent core in the front section of the underwear article.
[2]
Underwear article according to claim 1, wherein each of said maximum front width and said maximum rear width is greater than the minimum cross width by a factor of at least 1.0, more preferably at least 1.5, even more preferably at least 1.8, even more preferably at least 1.9, even more preferably at least 2.0, even more preferably at least 2.1, even more preferably at least 2.2.
[3]
3. Underwear article according to any of the preceding claims, wherein said front elastic waistband and said rear elastic waistband are suitable to form a substantially continuous elastic waistband when the underwear article is worn, the first front section edge being connected to the first rear section edge and the second front section edge is connected to the second rear section edge.
[4]
Underwear article according to any of the preceding claims, wherein the front section is connected to the rear region with a substantial permanent fixation, preferably wherein the first front section edge is connected to the first rear section edge and the second front section edge is connected to the second rear section edge, preferably the above-mentioned substantial permanent bond comprises an ultrasonic bond, an adhesive bond, a thermal bond and / or a thermomechanical bond.
[5]
Underwear article according to any of the preceding claims, wherein the laminate comprises transversely opposite first and second laminate edges that are substantially straight, and preferably substantially parallel, and wherein the underwear article comprises side panels provided on the laminate in the front and / or rear section and extending beyond the first and / or second laminate edges, preferably two side panels attached to the front section, a first front side panel extending beyond the first laminate edge and a second front side panel extending beyond the second laminate edge, and two side panels attached to the rear section, a first rear side panel extending beyond the first laminate edge and a second rear side panel extending beyond the second laminate edge, thereby ensuring that each of the aforementioned maximum front width and said maximum rear width is greater than the minimum cross width with the above factor, ie at least 1.0, more preferably at least 1.5, even more preferably at least 1.8, even more preferably at least 1.9, even more preferably at least 2.0, even more preferably at least 2.1, even more preferably at least 2.2.
[6]
The underwear article of claim 5, wherein at least one of said side panels comprises a side panel height, which is measured along a longitudinal direction, said side panel height varies depending on a transverse distance of said laminate, preferably said side panel height varies between a maximum side panel height and a minimum side panel height, comprising a maximum-to-minimum side-panel height ratio of at most 2.5, preferably at most 2.0, more preferably at most 1.9, more preferably at most 1.8, even more preferably at most 1.7, and / or preferably the above-mentioned maximum-minimum side panel height ratio at least 1.0, preferably at least 1.1, more preferably at least, 1.2.
[7]
The underwear article of any one of the preceding claims, wherein the laminate is transversely opposite first and second laminate edges. comprises cut out along at least partially non-parallel paths and / or at least partially curved paths, the aforementioned laminate edges define at least partially the edges defining the first and second leg opening, the first and second front section edges and the first and second rear section edges, said laminate edges thereby causing that each of said maximum front width and said maximum rear width is greater than the minimum cross-width with the above-mentioned factor, ie at least 1.0, more preferably at least 1.5, even more preferably at least 1.8, even more preferably at least 1.9, even more preferably at least 2.0, even more preferably at least 2.1, even more preferably at least 2.2.
[8]
Underwear article according to any of the preceding claims, wherein said underwear article is an hourglass shape, an hourglass shape with straight edges, an hourglass shape with curved edges, a dog bone shape, a polygonal shape, an octagonal shape, a octagonal shape with one or more includes curved edges.
[9]
The underwear article of any one of the preceding claims, wherein the absorbent core comprises a core height along the longitudinal axis of the underwear article, the core comprising transversely opposite first and second core edges that are substantially straight, and preferably substantially parallel, over a distance of at least 1%, preferably at least 25%, even more preferably at least 50%, even more preferably at least 75%, of the above-mentioned core height.
[10]
The underwear article of any preceding claim, wherein the absorbent core comprises a core height along the longitudinal axis of the underwear article between a core front end and a core rear end, the core comprising transversely-opposite first and second core edges that have an at least partial non-parallel path and / or follow an at least partially curved path, the above-mentioned first and second core edges thereby define a transversal core width that has a minimum that at least 10% of the above core height is positioned away from the above-mentioned core at the end and above-mentioned core, first and second core edges also preferably define a maximum transversal core width, the above-mentioned maximum transversal core width having a maximum-to-minimum core-width ratio with the above-mentioned minimum transversal core width of at least 1.0, preferably at least 1.1> more preferably at least 1.2, even more by voo have at least 1.3, more preferably at least 1.4, even more preferably at least 1.5.
[11]
11. Underwear article according to any of the preceding claims, - said laminate comprising a minimum transverse laminate width and said core comprising a minimum transverse core width, said underwear article comprising a laminate-to-core width ratio determined by the ratio between the above minimum transversal laminate width and above-mentioned minimum transversal core width, which is less than 2.2, more preferably less than 2.1, even more preferably less than 2.0, even more preferably less than 1.9, even more preferably less than 1.8, even more preferably less than 1.7, such as 1.60, 1.50, 1.40, 1.30, 1.20, 1.10, 1.00 or any value between them.
[12]
12. Underwear article according to any of the preceding claims, said laminate comprising a laminate height along the longitudinal axis and said core comprising a core height along the longitudinal axis, said underwear article comprising a laminate-to-core-height ratio determined due to the ratio between the laminate height and the core height, which is more than 1.0, preferably more than 1.3, more preferably more than 1.35, more preferably more than 1.4, even more preferably more than 1.45, and / or the aforementioned laminate to core-height ratio is less than 2.5, preferably less than 2.4, more preferably less than 2.3, even more preferably less than 2.2, such as 2.1, 2.0, 1.9.1.8, 1.7.1.6.1.5 or any other value in between.
[13]
An undergarment article according to any of the preceding claims, comprising containment flaps for the containment of faecal matter and for preventing the lateral flow of liquid waste until the liquid waste can be absorbed by the absorbent article.
[14]
The underwear article according to any of the preceding claims, comprising elastically made, longitudinally-extending leg cuffs provided on at least the crotch portion of the underwear article near said first and second edges, adapted to fit around the legs of a wearer during use and which serve as a mechanical barrier against the lateral flow of body secretions.
[15]
Underwear article according to any of the preceding claims, comprising a underwear article height along the longitudinal axis that is more than 45 cm, preferably more than 50 cm, more preferably more than 55 cm, even more preferably more than 60 cm, and / or the above height is less than 120 cm, preferably less than 115 cm, more preferably less than 110 cm, even more preferably less than 105 cm; and / or the aforementioned underwear article comprising a minimum underwear article width that is more than 10 cm, preferably more than 11 cm, more preferably more than 12 cm, and / or the above-mentioned minimum underwear article width is less than 40 cm, preferably less than 36 cm, more preferably less than 33 cm; and / or the aforementioned underwear article comprises a maximum underwear article width that is more than 35 cm, preferably more than 40 cm, more preferably more than 45 cm, even more preferably more than 50 cm, even more preferably more than 55 cm, and / or the aforementioned maximum underwear article width is less than 130 cm, preferably less than 120 cm, more preferably less than 110 cm.

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同族专利:

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公开号 | 公开日

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BE1022527A1|2016-05-24|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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WO1999025296A1|1997-11-17|1999-05-27|Kimberly-Clark Worldwide, Inc.|Disposable underpants|

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US20030120254A1|2001-12-20|2003-06-26|Franke Mark S.|Aesthetically improved side panels for disposable garments and methods of making the same|

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法律状态:
2018-08-31| FG| Patent granted|Effective date: 20160524 |

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2018-08-31| MM| Lapsed because of non-payment of the annual fee|Effective date: 20171130 |

优先权:

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申请号 | 申请日 | 专利标题

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EP14168513.1|2014-05-15|

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EP14168513|2014-05-15|

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