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    • 专利摘要:
    The present invention relates to an absorbent article (1), preferably a trouser-like incontinence diaper, comprising a chassis (2), a front waist region (3), a rear waist region (4) and a crotch region (5) that extends between the front and rear waist regions (3,4); the front and rear waist regions (3, 4) being connectable, and, when joined together, forming a waist opening and a pair of leg openings being formed by one or more cross-leg circumferential edges (17, 17 ') and front and rear waist-leg circumference edges (18, 18 ', 19, 19'), and wherein first and second front waist-leg circumference edges (18, 18 ') extend from a first position (20, 20') lying proximally from the crotch region (5) to a second position (21, 21 ') located distal therefrom and proximal to a side edge (15, 15') of the front waist region (3), with the second front waist leg circumferential edges (18, 18 ') are placed opposite each other from the longitudinal axis. It is characterized in that the distance D extends parallel to the longitudinal axis (YY) between the front waist end (13) and a fifth position (22, 22 ') along the first and second front waist leg circumference edges (18, 18 ') closest to the front waist end (13) is less than the length L of a front waist side edge (15, 15') that extends parallel to the longitudinal axis (YY).
    公开号:BE1026588B1
    申请号:E20195587
    申请日:2019-09-04
    公开日:2020-03-30
    发明作者:Dries Cobbaert；Sande Nathalie Van
    申请人:Ontex Bvba；Ontex Group Nv；
    IPC主号:
    专利说明:

    BE2019 / 5587 ELASTICALLY MADE ABSORBENT ARTICLE
    TECHNICAL AREA
    The invention relates 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 particularly, the present invention relates to absorbent clothing, such as disposable incontinence pants, which are configured to trap and retain faecal material and prevent leakage.
    BACKGROUND
    Absorbent articles with a limited core and chassis areas must have a comfortable fit around the wearer. Especially for absorbent hygiene articles in the form of pants, such as diaper pants, bandage pants and incontinence pants, it is also desirable that the articles can be pulled up and down over the wearer's hips, so that the wearer or caregiver can easily put on or take off the article if it is dirty. It is known that such absorbent pants are made with elasticized, stretchable side parts and a waist part, which usually comprise elastic members, such as elastic bands, which are fastened contractably between the backsheet and the top layer.
    It is further known that parts of the chassis are made of absorbent articles of an elastic material, such as elastically bonded laminates. Such laminates may contain a layer of meltblown elastomeric fibers that are stretched and interposed between the outer layers of spunbond webs.
    U.S. Patent No. 6,552,245 discloses an extensible outer layer for an absorbent article, which provides some permanent deformation when subjected to a tensile force. The stretchable outer layer comprises a narrowed laminate in the form of one layer of a narrowed non-elastic film and one layer of an elastic film. The films can be breathable.
    WO 03/047488 discloses an elastic laminate comprising an elastic film bonded on opposite sides to a first and second inelastic fiber layer. The laminate is manufactured by bonding the inelastic fiber layers to the elastic film layer and then stretching the composite material, causing the inelastic materials to break. The elastic film material can be a breathable material. The laminate can be included in an absorbent article.
    BE2019 / 5587 US 2004/0243086 discloses a disposable pant-like piece of underwear with a stretchable front and back, which are, for example, made of an elastic laminate. An absorbent assembly is secured to the front and rear parts.
    Further examples of absorbent articles partially made from elastic laminates can be found in U.S. Patent No. 6,476,289 and JP 10043235.
    U.S. Patent No. 7,785,307 recognized that for proper fit, improved comfort, and leakage protection, it is important that the dimensions of absorbent articles match the relative dimensions of the wearer. The relative dimensions of the article are also important so that the parts or areas of the article are not excessively large or small in relation to each other. The overall dimensions of the article and the relative dimensions of the parts thereof can also be adjusted to obtain an article with a more trouser-like appearance. The disclosed articles therefore comprise elasticized waist portion portions and the geometric shape of the front and rear areas of the article is such that the surface area of the front half of the article is less than (i.e. 80-90% of the surface area) the surface area from the back half of the article.
    European patent application EP17159249.6, which was filed on March 3, 2017, describes that in order to limit wrinkles and thus ensure a good fit and protection against leakage, it is important that a first elasticized surface between the crotch area and the front part is sufficiently small compared to a second elasticized surface area between the crotch area and the rear portion.
    Nevertheless, the improvement made by this document is primarily directed to the back of the absorbent article, and there is still a need to improve the properties of absorbent articles comprising an elastic web material such as an elastic laminate in especially its fit in the front part of the article, especially in the area of the article that will be worn near the wearer's crotch region, in order to limit wrinkle formation at this specific region, in order to maintain the appearance and feel of to approach standard underwear better while providing excellent leakage protection.
    SUMMARY OF THE INVENTION
    The present invention provides an absorbent hygiene product suitable for being worn around a wearer's lower body, such as disposable adult incontinence pants, according to claim 1.
    BE2019 / 5587 In one respect, the present invention further includes one or more side barriers extending along the crotch region and preferably comprising one or more leg hems and one or more elastics connected thereto, said barriers being further arranged while wearing the absorbent article to attach to any part of a person's legs. The absorbent article preferably includes at least two such barriers disposed in opposite directions proximal to the side edges of the crotch region with the longitudinal axis extending therebetween. The barriers are preferably arranged to provide a tension along the length of the crotch region in a direction substantially parallel to the longitudinal axis.
    The product of the present invention solves the problems of prior art products because it not only offers a better fit that fits closely to the body, especially in the area of the article that will be worn near the crotch area of the wearer, but surprisingly also reduces the risk of leakage, while at the same time providing the wearer with the necessary freedom of movement and underwear-like feel.
    DESCRIPTION OF THE FIGURES
    Fig. 1 is a schematic plan view of an unassembled and fully stretched article according to an embodiment of the present invention.
    Fig. 2 is a schematic top view of an unassembled and fully stretched article according to an embodiment of the present invention.
    Fig. 3 is a front view of an article according to the invention placed on a mannequin.
    Fig. 4 is a front view of an article not in accordance with the invention placed on a mannequin.
    DETAILED DESCRIPTION OF THE INVENTION
    Unless otherwise indicated, all terms used in the description of the invention, including technical and scientific terms, have the meanings assigned to them by one of ordinary skill in the art to which this invention belongs. For further support, definitions are included herein to better understand the explanation of the present invention.
    As used in this description, the following terms have the following meanings:
    "A," "the," and "it," as used herein, refer to both the singular and the plural unless the context clearly indicates otherwise. For example, “a compartment” refers to one or more compartments.
    BE2019 / 5587 "Approximately", as used herein and referring to a measurable value such as a parameter, amount, duration and the like, includes variations of +/- 20% or less, preferably +/- 10% or less, according to a larger preferably +/- 5% or less, even more preferably +/- 1% or less, and even more preferably +/- 0.1% or less of the indicated values, insofar as such variations are applicable to effect in the described invention. It is to be understood, however, that the value to which "approximately" refers is in itself also specifically indicated.
    “Include”, “comprising” and “includes” as used herein are synonymous with “containing”, “containing” or “contains” and are inclusive or undefined terms that describe the presence of what follows, eg a component, and which do not preclude the presence of additional, unlisted parts, properties, elements, organs or steps known in the art or described therein.
    The term “% by weight” (weight percent), here and throughout the description, unless otherwise noted, refers to the relative weight of the part in question based on the total weight of the formulation.
    The designation of a numeric range by means of end points contains all numbers and fractions within that range as well as the mentioned end points.
    "Absorbent article" refers to devices that absorb and retain fluid and more specifically it refers to devices placed against or in the vicinity of the wearer's body to receive and retain the various secretions flowing from the body. Absorbent articles include, but are not limited to, diapers, adult incontinence pants, toilet pants, panties and panty liners, sanitary napkins, etc., as well as surgical dressings and tampons. Absorbent articles preferably include a longitudinal axis and a transverse axis perpendicular to the longitudinal axis. The longitudinal axis is conventionally selected in the front to back direction of the article when worn and the transverse axis is conventionally selected in the left to right direction of the article when worn. Disposable absorbent articles may include a liquid pervious topsheet, a backsheet bonded to the topsheet, and an absorbent core sandwiched and retained between the topsheet and the backsheet. The top sheet in operation permits liquids to be retained and stored by the absorbent article and the back sheet may or may not be substantially impermeable or otherwise impermeable in function to the intended liquids. The absorbent article may also contain other parts, such as liquid-draining layers, liquid-receiving layers, liquid-spreading layers, transfer layers, barrier layers, wrapping layers and the like, as well as combinations thereof. Disposable absorbent articles and their components can provide a body-facing surface and a garment-facing surface.
    BE2019 / 5587 An absorbent incontinence product, such as a diaper, includes a front waistband area, a rear waistband area, an intermediate crotch area connecting the front and back waistband areas. A reference in this description to a "front" portion refers to that portion of the diaper typically in use at the front of an incontinent person. A reference to the "back" part refers to the part of the diaper that is usually in use at the back of the incontinent person in use and a reference to the "crotch" part refers to that part that is usually between the legs in use of an incontinent person. The crotch region is an area where repeated fluid flows tend to occur.
    A diaper preferably comprises a liquid pervious "top layer", a non-liquid pervious "back layer" and an "absorbent medium" placed between the top layer and the back layer. The top sheet, back sheet and absorbent medium may be made of any suitable material known to those skilled in the art. The top layer is usually on or near the surface of the article facing the body, while the back layer is usually on or near the surface of the article facing the clothing. Optionally, the article may comprise one or more separate layers in addition to the backsheet placed between the backsheet and the absorbent medium. The topsheet and backsheet are bonded or otherwise operably bonded.
    The "absorbent medium" or "absorbent core" or "absorbent body" is the absorbent construction interposed between the top and back layers of the absorbent article in at least the crotch region of the absorbent article and capable of liquid body secretion record and hold. The size and absorbency of the absorbent medium must be compatible with the size of the intended carrier and the fluid load exerted by the intended use of the absorbent article. Furthermore, the size and absorbency of the absorbent medium may vary to suit carriers from infants to adults. It can be manufactured in a wide variety of shapes (for example, rectangular, trapezoidal, T-shape, I-shape, hourglass shape, etc.) and a wide variety of materials. Examples of commonly used absorbent materials are cellulose fluff pulp, gauze layers, highly absorbent polymers (so-called superabsorbent polymer particles (SAP)), absorbent foam materials, absorbent nonwoven materials and the like. It often happens that cellulose fluff pulp with superabsorbent polymers is combined in an absorbent material.
    "Absorption and dispersion layer" or "flow control part" refers to a sublayer which preferably consists of a nonwoven drain layer below the top layer of an absorbent product, which accelerates transportation and improves the dispersion of fluids through the absorbent core. The flow control part is generally less hydrophilic than the holding part and can quickly and temporarily hold liquid flows and retain the liquid from the original
    BE2019 / 5587 transport the point of entry to other parts of the absorbent structure, in particular the holding part. This configuration can help prevent the liquid from puddling and collecting on the part of the absorbent garment placed against the wearer's skin, making it less moist to the wearer. The flow control part is preferably located between the top layer and the holding part.
    The term "adhesive" as used herein refers to a suitable hot melt, water or solvent based adhesive which can be applied to a film layer surface in the required pattern or network of adhesive areas to form the nonwoven film laminate of the present invention . Accordingly, conventional hot melt adhesives, pressure sensitive adhesives and reactive adhesives (i.e., polyurethane) are suitable adhesives.
    As used herein, the term "adhesive bonding" means a bonding process in which a bond is formed using an adhesive. The adhesive can be applied in various ways, such as in a slit coating, a spray coating and other topical application methods. Furthermore, such an adhesive can be applied within a product part and then exposed to pressure, so that an adhesive bond is formed between the two parts by contact of a second product part with the product part containing the adhesive.
    As used herein, an "air-formed web" refers to a material comprising cellulose fibers, such as down pulp, which are separated from one another, for example, by grinding in a hammer mill, and then deposited on a porous surface without a large amount binding fibers are present. Air-felted materials used in many diapers for the absorbent core, for example, are a typical example of an air-formed material.
    As used herein, an "airlaid web" is a fiber structure that is primarily formed as a process of depositing air trapped fibers on a mat, typically containing bond fibers, and usually followed by compaction and thermal bonding. In addition to traditionally thermally bonded airlaid constructions (formed in the presence of a non-tacky bonding material and primarily thermally bonded), the scope of the term "airlaid" of the present invention may also include a coform produced by dry dispersed cellulose fibers having trapped air with meltblown synthetic polymeric fibers, while the polymeric fibers are still tacky. Furthermore, an air-formed web to which binder has subsequently been added falls within the scope of the term "airlaid" according to the present invention. Binder can be added in liquid form (e.g. an aqueous solution or a melt) to an air-formed web by nozzles, direct injection or impregnation, vacuum drawing,
    BE2019 / 5587 foam impregnation, etc. Solid binding particles can also be added mechanically or pneumatically.
    As used herein, the term "bonded" includes configurations in which the topsheet is bonded directly to the backsheet by adhering the topsheet directly to the backsheet, as well as configurations in which the topsheet is bonded to the backsheet by bonding the topsheet to intermediate members that are on are attached to the backsheet in turn. The topsheet and backsheet can be directly bonded together with a fastener, such as an adhesive, sonic bonds, thermal bonds or other fasteners known in the art. For example, a uniform continuous layer of adhesive, a patterned layer of adhesive, a sprayed pattern of adhesive, or a series of discrete lines, curls or dots of construction adhesive can be used to affix the top layer to the backsheet. It is to be understood that the fasteners described above may also be used to join and assemble the various other components of the article described herein.
    The terms "back part" and "rear back part" are used herein as synonyms and refer to the area of the absorbent article that contacts the wearer's back when the absorbent article is worn.
    The term "backsheet" refers to a material that forms the outer protective layer of the absorbent article. The back layer prevents secretions retained in the absorbent construction from moisturizing objects such as bedding and outerwear that contact the disposable absorbent article. The backsheet may be a one-piece layer of material or a composite layer consisting of multiple parts assembled side by side or in layers. The backsheet may be the same or different in different parts of the absorbent article. At least in the area of the absorbent medium, the backsheet comprises a non-liquid-permeable material in the form of a thin plastic film, e.g., a polyethylene or polypropylene film, a nonwoven material coated with a non-liquid-permeable material, a hydrophobic nonwoven material, that resists liquid penetration, or a laminate of a plastic film and a non-woven material. The backsheet material can be breathable, allowing odors to escape from the absorbent material, while at the same time preventing liquids from passing through. Examples of breathable backsheet materials include porous polymeric films, nonwoven spun and meltblown laminates, and laminates of porous polymeric films and nonwovens.
    The terms "belly portion" and "anterior belly portion" are used herein as synonyms and refer to the region of the absorbent article that contacts the wearer's abdomen when the absorbent article is worn.
    BE2019 / 5587 A strap can be attached to the diaper to provide a mechanism for holding the diaper in place with the wearer. The belt may be a continuous belt attached to the diaper front and / or back waistband area or two separate belt members each attached to a respective side of the diaper front and / or back waistband area. When a belt is present, the absorbent article is often referred to as a belt diaper. A “belt diaper” aims to surround the lower part of the wearer's body like absorbent pants. For example, if the belt consists of two belt parts that extend on each side of the rear waistband area of the diaper, the belt diaper can be attached to a wearer in the following manner: first, the two belt parts are fastened around the wearer's waist, while the front end of the diaper hangs down between the wearer's legs. When the belt members are joined together, the wearer can reach down between his or her legs to pull up the absorbent pants between the legs to secure the free end of the diaper to the belt member. Fastening the two belt parts and fastening the belt to the diaper is usually done with a fastener, such as Velcro, eg VELCRO®, or adhesive fasteners. However, it is to be understood that other types of fasteners are possible, including, but not limited to, adhesive, snaps, buttons and buttonholes, bows and tapes. The belt diaper can also be manufactured so that the belt is attached to the proposed part of the product and attached to the wearer's back. In this case, the absorption product will hang down at the front and be attached to the belt at 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 with one another.
    As used herein, the "body-facing" surface or "body-side" surface means that surface of the article or part that is intended to be applied toward or adjacent to the wearer's body during normal use, while the “outward facing” or “clothing side” surface is on the opposite side and is intended to be applied away from the wearer's body during normal use. This outwardly facing surface can be placed in the direction of or adjacent to the wearer's undergarments when the absorbent article is worn.
    "Connected" or "bound" refers to the joining, bonding or attaching, etc. of at least two elements. Two elements are considered to be bonded together when they are directly or indirectly bonded together, such as when each of the elements is bonded directly to intermediate elements.
    The term "breathable" refers to layers, preferably films or elastic laminates, with a water vapor transmission rate (WVTR) of at least 300 grams / m 2 - 24 hours.
    BE2019 / 5587 "Carded web" refers to webs made of staple fibers passed through a comb or carding unit, thereby opening the staple fibers and aligning them in the machine direction to form a substantially machine oriented fibrous nonwoven web. The web is then joined by one or more of the known bonding methods. Joining nonwoven webs can be accomplished by a number of methods; powder bonding, wherein a powdered adhesive or binder is spread throughout the web and then activated, usually by heating the web and the adhesive with warm air; pattern bonding, using heated calender rolls or ultrasonic bonding equipment to bond the fibers together, usually in a localized bonding pattern, although the web can be bonded over its entire surface if desired; air bonding, wherein air that is warm enough to soften at least one component of the web is passed through the web; chemical bonding using, for example, latex adhesives applied to the web by, for example, spraying; and assembly in a mechanical manner such as piercing and water felting.
    As used herein, the term "cellulose" includes any material of which cellulose is a major constituent and in particular comprises at least 50 percent by weight of cellulose or a derivative of cellulose. That is, the term includes cotton, wood pulp, non-woody cellulose fibers, cellulose acetate, cellulose triacetate, rayon, thermomechanical wood pulp, chemical wood pulp, decomposed chemical wood pulp, silk plant and bacterial cellulose.
    "Chassis" refers to a basic component of an absorbent item on which the rest of the structure is built or laid. In a diaper, for example, the construction elements that give the diaper the shape of a slip or pants when configured to wear, such as a backsheet, topsheet or a combination of a topsheet and backsheet.
    "Coform" as used herein describes a mixture of meltblown fibers and cellulose fibers, which is formed by air-forming a meltblown polymeric material while simultaneously blowing airborne cellulose fibers into the meltblown fibers stream. The coform material may also contain other materials, such as super absorbent particles. The wood fibers containing melt blown fibers are collected on a molding surface, such as a porous belt. The mold surface may contain a gas permeable material, such as a material of a spunbond fabric, which is applied to the mold surface.
    "Compression" refers to a process or result of pushing by applying force to an object, thereby increasing the density of the object.
    The concept of "mainly consisting of" does not exclude the presence of additional materials that do not significantly affect the desired properties of a particular composition or product. Examples of these types of materials include pigments,
    BE2019 / 5587 antioxidants, stabilizers, surfactants, waxes, flow improvers, solvents, particles and materials added to improve the workability of the composition.
    Furthermore, the diaper may contain "containment valves" or "barrier edges". The containment valves are generally considered to be particularly suitable for holding faeces and preventing the lateral flow of liquid until the liquid can be absorbed by the absorbent article. Many constructions for containment valves are known. Such containment valves typically include a proximal edge to be attached to the absorbent article and an opposing distal edge, which is generally not attached to the absorbent article, along at least a portion of its length. Typically adjacent to the distal rim is an elastic member to hold the containment valve in an upright position and provide a sealing connection between the distal rim of the containment valve and a wearer's body during use. The elastic member is usually located between two layers of material so that the elastic does not come into contact with a wearer's body. The containment valves can be made from a wide variety of materials, such as polypropylene, polyester, rayon, nylon, foam, plastic films, molded films and elastic foam. A number of manufacturing techniques can be used to manufacture the containment valves. The containment flaps can be woven, nonwoven, spunbond, carded, cast, blown and the like, for example.
    The diaper may include leg cuffs. Leg cuffs help prevent leakage of body secretion when the wearer applies compressive forces to the absorbent article. In particular, the stiffness of the leg enclosures helps prevent the leg openings of the absorbent article from twisting or accumulating, which can lead to leaks. In addition, the elasticity and deformability of the leg wrapping edges ensure that the body-facing surface of the leg wrapping edges provides adequate sealing against the wearer's body. The physical properties of the leg enclosures, such as thickness and stiffness, also function to place the body-side insert, outer layer and absorbent core some distance away from the wearer's body in use. As such, a void space is created between the wearer's body and the body-side insert and absorbent core of the absorbent article to help retain body secretion.
    Continuous ”means that the construction described is a closed loop construction. The continuous construction may be integral, that is to say, in one piece, or consist of separate parts that are suitably joined together to form a closed loop.
    A "continuous waistband" can be an elastomeric, fabric-like, nonwoven fiber material, such as an elastomeric, elastically bonded laminate web or an elastomeric meltblown
    BE2019 / 5587 job. Due to the correct choice of material, the continuous waistband can be temporarily elastically blocked, for example by compression. When it is temporarily elastically blocked, the elastic material making up the waistband can be activated, for example by treating it with heat, to return it to an elastic state.
    "Conventional Hot Melt Adhesive" means a formulation that typically includes several components. These components typically contain one or more polymers to provide consistency and strength (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 similar material (sometimes referred to as a tackifier) to provide tack (for example, hydrocarbon distilled from petroleum distillates; resins and / or resin esters; terpenes derived, for example, from wood or citrus, etc.); perhaps waxes, plasticizers or other materials for altering the viscosity (i.e., flowability) (examples of such materials include mineral oil, polybutene, paraffin oils, ester oils and the like); and / or other additives, including, but not limited to, antioxidants or other stabilizers. A typical hot melt adhesive formulation may contain between about 15 and about 35 weight percent cohesive force providing polymer or polymers; between about 50 to about 65 weight percent resin or one or more other tackifiers. between greater than zero and about 30 percent by weight plasticizer or other viscosity modifying agent; and optionally less than about 1 weight percent stabilizer or other addition. It is to be understood that other formulations for adhesives with different weight percentages of these components are possible.
    The term "density" or "concentration" when referring to the absorbent material, especially the superabsorbent polymer particles, of a layer refers to the amount of absorbent material that is divided by the surface area of the layer over which the absorbent material is spread.
    As used herein, the term "diaper" refers to an absorbent article that is usually worn around the abdomen by incontinent persons.
    "Continuous bonding pattern" as used herein refers to a pattern of bonding regions, especially bonding regions between layers, wherein at least in at least one region the layers are not bonded together. A non-continuous connection pattern can be a contiguous connection area or multiple non-contiguous connection areas. A non-continuous bonding pattern may further include a connected bonding region comprising a plurality of holes where the layers are not bonded together, preferably in a regular pattern. Or it may include several non-connected connection areas, e.g. a dot pattern comprising a plurality of discrete connection points surrounded by non-bonded areas or a
    BE2019 / 5587 line pattern comprising a plurality of discrete connecting lines interspersed by non-bonded areas, preferably in a regular pattern.
    "Disposable absorbent garments" preferably include a front segment, a rear segment, a crotch segment, elastic side segments, seams, a continuous waist opening and / or a set of continuous leg openings. Each elastic side segment preferably includes a front elastic side member and a rear elastic side member, which can be joined together on a respective seam.
    The term "disposable" is used herein to describe absorbent articles which are typically not intended to be washed or otherwise recovered or reused as an absorbent article (i.e., are intended to be discarded after a single use and preferably recycled , composted or otherwise disposed of in an environmentally friendly manner).
    As used herein, the term "elastic resistance" describes an elastic force that tends to resist an applied tensile force, whereby a material provided therewith tends to contract to a relaxed configuration in response to a tensile force .
    As used herein, the terms "elastic", "elastomeric", "elasticity" or derivatives thereof are used to describe the ability of various materials and articles having this property to undergo reversible deformation under stress, for example, to be stretched in at least at least one direction when a force is applied to the material and to assume substantially its original dimensions after relaxation, i.e. when the force is released, without tearing or breaking. It preferably refers to a material or composite that can be elongated in at least one direction by at least 50% of its relaxed length, i.e., extended to at least 150% of its relaxed length, and at least 40% of the extension becomes shorter after the applied voltage has been removed. Accordingly, upon release of the applied force, the material or composite contracts at 50% elongation to a relaxed length of no more than 130% of its original length. Examples of applicable elastomeric materials are 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 term "made elastic" refers to a material, layer or sub-layer which is not elastic in itself, but which is made elastic by, for example, suitably connecting an elastic material or an elastic layer or sub-layer thereto.
    BE2019 / 5587
    The term "contractable to connect" or "contractable" refers to an elastic material that is suitable to be or is connected to another material, with the elastic material in its stretched condition, forcing contraction from the other material, when the elastic material is relaxed. As an example, an elastic material (elastic film or elastic bands) is stretched and then bonded to and between two nonwoven web materials. When the combination is relaxed, both the elastic material and the non-woven material contract and cause wrinkles / wrinkles.
    "Elongation" means the ratio of the stretch of a material to the length of the stretch material (expressed in percent). "Stretch" means the change in the length of a material due to stretching (expressed in a unit of length).
    As used herein, the term "stretchable" means extendable in at least one direction, but not necessarily repairable.
    The term "fabrics" is used to refer to all woven, knitted and non-woven fiber webs.
    The term "finished" or "final" means, when it refers to a product, that the product has been appropriately manufactured for its intended purpose.
    The term "flexible" refers to materials that yield and that adapt easily to the shape and contours of the wearer's body.
    As used herein, the term "garment" means any type of garment that can be worn. This includes diapers, toilet pants, incontinence products, surgical gowns, factory and overalls, undergarments, pants, shirts, jackets and the like.
    The term "illustration" means, but is not limited to, any type of design, image, brand, figure, codes, words, patterns, and the like. For a product such as potty pants, the illustrations will usually include articles related to little boys and girls, such as multicolored trucks, airplanes, balls, dolls, bows and the like.
    Many of the known superabsorbent polymer particles have gel blocking. "Gel blocking" occurs when superabsorbent polymer particles become wet and the particles swell, thereby blocking the transmission of fluid to other areas of the absorbent structure. The moistening of these other areas of the absorbent member therefore occurs through a very slow spreading process. In practical terms, this means that the absorption of fluids by the absorbent construction is much slower than the rate at which the fluids are excreted, especially when flows are involved. Leaks from the absorbent article can occur long before the superabsorbent polymer particles enter
    BE2019 / 5587 the absorbent member is fully saturated or before the fluid can flow or drain past the "blocking" particles to the rest of the absorbent member. Gel blocking can be a particularly acute problem if the superabsorbent polymer particles have insufficient gel strength and deform or dissipate under stress when the particles swell due to the absorbed fluid.
    The term “highly absorbent material” refers to materials that are capable of absorbing at least 10 times their own weight in liquid. The highly absorbent material may comprise absorbent gel materials, such as super absorbent polymers. Superabsorbent polymers are water-swellable, water-insoluble organic or inorganic materials that are capable of absorbing at least about 20 times their own weight of an aqueous solution containing 0.9 weight percent sodium chloride. Absorbent gel materials can be natural, synthetic and modified natural polymers and materials. In addition, the absorbent gel materials can be inorganic materials, such as silica gels, or organic compositions, such as cross-linked polymers. The term "cross-linked" refers to any means by which normally water-soluble materials are rendered essentially water-insoluble but swellable. Such an agent can be, for example, physical cross-linking, crystalline domains, covalent bonds, ionic complexes and compounds, hydrophilic compounds, such as hydrogen compounds, and hydrophobic compounds or Van der Waals forces. Examples of synthetic absorbent polymers with gel material are the alkali metals 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 construction are natural and modified natural polymers such as starch with hydrolysed acrylonitrile, starch with acrylic acid, methyl cellulose, carboxymethyl cellulose, hydroxypropyl cellulose and a natural gum such as xanthan gum, locust bean gum and the like. Mixtures of natural and partially or fully synthetic absorbent polymers can also be used. Synthetic absorbent gel materials are xerogels that form hydrogels when wetted. However, the term "hydrogel" is often used to refer to both the moist and non-moist forms of the material. The highly absorbent material can have any of a wide variety of geometric shapes. Typically, it is preferred that the highly absorbent material be in the form of discrete particles. However, the highly absorbent material may also be in the form of fibers, flakes, rods, spheres, needles, coils or semi-coils, cubes, a rod-like shape, a polyhedron and the like. Also conglomerates of particles of a highly absorbent material can be used. The highly absorbent material may be present in the absorbent core in an amount of from 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 highly absorbent material within the different parts of the absorbent core is possible
    BE2019 / 5587 will vary depending on the intended end use of the absorbent core. The highly absorbent material can be applied in a generally separate layer within the matrix of hydrophilic fibers. Alternatively, the absorbent core may comprise a laminate of fiber webs and a high-absorbency material or other appropriate means for keeping a high-absorbency material in a localized area.
    "Water felting process" refers to the production of non-woven webs. The process consists of guiding a series of water jets in the direction of a fiber web that lies on a moving porous belt. The jets of water go down through the mass of fibers and spring back and burst when they make contact with the surface of the tire: the released energy causes the fibers to be cross-linked.
    The term "hydrophilic" describes fibers or the surfaces of fibers that are wetted by the aqueous liquids that contact the fibers. The degree of moisture of the materials can again be described in terms of the contact angles and the surface stresses of the respective liquids and materials. The term "wettable" refers to a fiber with a contact angle between a liquid, such as water, synthetic urine or an aqueous solution containing 0.9% salt by weight, and air of less than 90 °, while "hydrophobic" or "non-wettable" describes fibers with contact angles equal to or greater than 90 °.
    As used herein, the term "impermeable" usually refers to articles and / or parts in which substantially no aqueous fluid penetrates its entire thickness at a pressure of 1.0 kPa or less. Preferably, the impermeable article or part does not penetrate an aqueous fluid under a pressure of 3.4 kPa or less. More preferably, no fluid penetrates through the impermeable article or part under a pressure of 6.8 kPa or less. An item or part that is not impenetrable is permeable.
    "Integral" is used to refer to several parts of a single, one-piece element, rather than separate structures connected or placed adjacent or adjacent to each other.
    "Connecting", "connected" or variations thereof, when used to describe the relationship between two or more elements, means that the elements can be joined together in any appropriate manner, for example, by heat sealing, ultrasonic bonding, thermal bonding , with adhesives, sewing and the like. Furthermore, the elements can be directly connected to each other or one or more elements can be placed between them, all of which are connected to each other.
    The term "flat state" or "fully stretched state" refers to the article when it is (mainly) flattened in a plane and this term is used as a counterpart to when
    BE2019 / 5587 the article is positioned otherwise, such as when the article is folded or formed in use or to be used by a carrier (i.e. in a manner as illustrated in Fig. 1 to Fig. 5).
    Laminate refers to elements bonded 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, nonwoven web, films, laminates, composites, elastomeric materials, and the like. A layer can be liquid and air permeable, permeable to air, but impermeable to liquids, impermeable to both air and liquid and the like. When used in the singular, it can have the dual meaning of a single element or a multitude of elements.
    "Liquid" means a non-gaseous substance and / or non-gaseous material that flows and can take the internal form of a container into which it is poured or placed.
    "Length direction" is a direction that is parallel to the maximum linear size of the item.
    The term "melt blown fiber" means fibers formed by extruding a molten thermoplastic material through a plurality of fine, usually circular die tubes, as molten threads or filaments in a high velocity gas stream (eg air), which allows the filaments of molten thermoplastic material thins and its diameter becomes smaller, possibly to that of a microfibre. Typically, meltblown fibers have an average fiber diameter of up to about 10 microns. After the fibers are formed, the meltblown fibers are carried at high velocity by the gas stream and deposited on a collection surface to form a web of randomly placed meltblown fibers.
    The term "non-elastic" or "inelastic" refers to any material that does not fall within the above definition of "elastic" and typically does not include elastic materials, such as the elastic web materials described herein.
    The term "nonwoven fabric or web" means a sheet material with a structure of discrete fibers or threads laid together but not in a regular manner as occurs in knitting or weaving. Non-woven fabrics or webs are formed by all kinds of processes, such as melt blowing and binding by spinning or carding.
    “Pants Body” refers to a garment that has a waist opening and a set of leg openings, such as shorts, swimwear, and the like. The described garment may or may not have a manually tearable side seam.
    BE2019 / 5587 The terms “particle”, “particles” and the like mean that the material is usually in the form of separate units. The units can include granules, powders, spheres, pulverized materials and the like, as well as combinations thereof. The particles can have any desired shape, such as, for example, cubic, rod-shaped, polyhedral, round or semicircular, rounded or semi-rounded, angular, irregular, etc. Shapes with a large ratio between the largest and the smallest size, such as needles, flakes and fibers, may also fall within this definition. The term "particle" may also be an agglomeration that includes more than one separate particle and the like. In addition, a particle or a desired agglomeration thereof may be composed of more than one type of material.
    The term "polymer" generally includes, but is not limited to, homopolymers, copolymers, such as, for example, block, graft, random and alternating copolymers, terpolymers, etc., and mixtures and modifications thereof. Furthermore, unless otherwise specifically limited, the term "polymer" may include all possible geometric configurations of the material. These configurations include, but are not limited to, isotactic, syndiotactic, and arbitrary symmetries.
    The term "prepackaged", as used herein, means that one or more articles are packaged in a single unit before stacking.
    "Pulp down" or "down pulp" refers to a material consisting of cellulose fibers. The fibers can be natural or synthetic fibers or a combination thereof. The material is usually lightweight and has absorbent properties.
    The "holding part" or the "liquid absorption layer" is part of the absorbent medium (or absorbent core). This portion may comprise a matrix of hydrophilic fibers, such as a web of cellulose fluff mixed with particles of a highly absorbent material. In specific devices, the holding member may comprise a mixture of superabsorbent hydrogel-forming particles and synthetic polymeric meltblown fibers or a mixture of superabsorbent particles with a fibrous coform material comprising a mixture of natural fibers and / or synthetic polymeric fibers. The superabsorbent particles can be essentially homogeneously mixed with the hydrophilic fibers or they can be non-uniformly mixed. For example, the concentrations of superabsorbent particles may be in a non-stepwise gradient through a significant portion of the thickness of the absorbent structure, with lower concentrations toward the body side of the absorbent structure and relatively higher concentrations toward the outside of the absorbent structure. the absorbent construction. The superabsorbent particles can also be arranged in a generally separate layer within the matrix of hydrophilic fibers. In addition, two or more different types of superabsorbent particles may be selectively positioned at different locations within or along the fiber matrix.
    BE2019 / 5587 As used herein, the term "sheet" or "sheet material" refers to woven materials, nonwoven webs, polymer films, polymeric loosely woven cotton-like materials and polymeric foam layers.
    The term "spunbond fibers" refers to fibers formed by extruding molten thermoplastic polymers such as filaments or fibers from a plurality of relatively fine, usually circular, tubes from a spinneret and then rapidly drawing the extruded filaments through an eductive or another known pulling mechanism to impart molecular orientation and physical strength to the filaments. The average diameter of spunbond fibers is usually in the range of 15-60 μm or higher. The spinneret can be a large spinneret with several thousands of holes per meter in width or a series of small spinnerets containing, for example, 40 holes.
    The term "spunbond meltblown spunbond" (SMS) nonwoven 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 nonwoven fabric can be continuously formed by successively depositing a first layer of spunbond fibers, a layer of meltblown fibers and a second spunbond fibers on a moving porous collection surface. The superposed layers can be bonded by passing through a slit formed between two rollers, which can be heated or unheated and smooth or patterned. Alternatively, the individual spunbond and meltblown layers can be preformed and optionally bonded and collected separately, for example, by wrapping the fabrics on take-up rolls. The individual layers can be assembled by superimposing them later and bonding together to form an SMS nonwoven fabric. Additional spunbond and / or meltblown layers can be included in the SMS fabric, for example, spunbond meltblown, meltblown spunbond (SMMS), etc.
    "Staple fibers" refer to commercially available fibers with a diameter of less than about 0.001 mm to more than about 0.2 mm; they are available in various shapes, such as short fibers with a length of about 10 to 50 mm and long fibers with a length of more than 50 mm, preferably up to 100 mm.
    By "stretch" is meant that the material is able to stretch beyond its original size in at least one dimension when subjected to a tensile force (i.e. tension) applied in the direction of that dimension, without break the material. For example, an elongation of 50% means that the material with an initial length of 100 mm has reached a length of 150 mm. "Stretch" can be in one direction, two directions or multiple directions. The specific stretch properties of a material can vary along each of the stretch vectors. The term may refer to elastic materials, as well as nonwoven materials which may be stretchable by themselves, but not necessarily
    BE2019 / 5587 in an elastic manner. Such nonwoven materials can behave elastically by binding them to elastic films.
    The use of the term "substrate" includes, but is not limited to, woven or nonwoven webs, porous films, ink-permeable films, paper, composite structures, and the like.
    Superabsorbent materials suitable for use in the present invention are known to those skilled in the art and may be of any workable form, such as particles, fibers and mixtures thereof. In general, the "superabsorbent material" may be a water-swellable, generally non-water-soluble, hydrogel-forming polymeric absorbent material, capable of at least about 15, suitably about 30 and possibly about 60 times or more, its own weight in physiological salt (e.g. salt with 0.9% by weight NaCl). The superabsorbent material can be biodegradable or bipolar. The hydrogel-forming polymeric absorbent material may be made from organic hydrogel-forming polymeric material, which may contain a natural material such as agar 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, polyacrylamides, polyvinyl alcohol, ethylene maleic anhydride copolymers, polyvinyl ethers, polyvinyl morpholinone, polymers and copolymers of vinyl sulfonic acid, polyacrylates, polyacrylamides, polyvinylpyridine. Other suitable hydrogel-forming polymers are starch with hydrolysed acrylonitrile, starch with acrylic acid and isobutylene maleic anhydride copolymers and mixtures thereof. The hydrogel-forming polymers may be slightly cross-linked to render the material substantially non-water soluble. Cross-linking can take place, for example, by radiation or atom, ion, Van der Waals or hydrogen bonding. The superabsorbent material may suitably be incorporated into a designated storage or holding portion of the absorbent system and may optionally be used in other parts or portions of the absorbent article. The superabsorbent material can be incorporated into the absorbent layer or other fluid storage layer of the absorbent article of the present invention in an amount up to about 60% by weight. The superabsorbent material, if present, will usually be included in an amount from about 5% to about 40% by weight, based on the total weight of the absorbent layer.
    "Superabsorbent polymer particles" or "SAP" refer to water-swellable, water-soluble organic or inorganic materials which, under the most favorable conditions, are capable of at least about 10 times their weight, or at least about 15 times their weight or at least about Take up 25 times their weight in an aqueous solution containing 0.9 weight percent sodium chloride. In absorbent articles, such as diapers, incontinence diapers, etc., the particle size is usually between 100 to 800 μm, preferably between 300 to 600 μm, more preferably between 400 to 500 μm.
    BE2019 / 5587 “Tension” includes a uniaxial force that tends to cause a body to stretch or the compensating force in that body to resist stretching.
    As used herein, the term "thermoplastic" describes a material that softens when exposed to heat and which returns substantially to its original condition when it cools to room temperature.
    The term "topsheet" refers to a sheet of liquid-permeable material that forms the inner cover of the absorbent article and is placed in direct contact with the wearer's skin in use. The topsheet is typically used to help insulate the wearer's skin from liquids retained in the absorbent construction. The top layer may comprise a nonwoven material, e.g. spunbond, meltblown, carded, water crosslinked, wetlaid, etc. Applicable nonwoven materials may be composed of man-made fibers, such as polyester, polyethylene, polypropylene, viscose, rayon, etc., or natural fibers, such as wood pulp or cotton fibers, or a mixture of natural fibers. and artificial fibers. The top layer material may further be composed of two fibers, which may be joined together in a bonding pattern. Further examples of material for the top layer are porous foams, apertured plastic films, laminates of nonwoven materials and apertured plastic films, etc. The materials suitable as the material for the top layer must be soft and non-irritating to the skin. and body fluids, e.g. urine and menstrual blood, must be able to penetrate quickly. The inner coating may further be different in different parts of the absorbent article. The topcoat fabrics may be composed of a substantially hydrophobic material, and the hydrophobic material may optionally have been treated with a surfactant or otherwise processed to provide a desired level of wettability or hydrophilicity.
    As used herein, the term "transverse" or "lateral" refers to a line, axis, or direction that is in the plane of the absorbent article and is generally perpendicular to the longitudinal direction.
    “Ultrasonic Welding” refers to a technology that binds two materials together by melting them with heat generated from ultrasonication and then laminating them together to allow the molten materials to flow and the space between the two unaffected parts of the two stuffing materials. After cooling and molding, the two materials are joined together.
    As used herein, the term "water-swellable, non-water-soluble" refers to a material that, when exposed to excessive water, swells up to balance volume but does not dissolve in the solution. As such, a water-swellable, non-water-soluble retains its original identity or physical structure during water uptake, but in a very expanded state, and therefore must have sufficient physical strength to resist flow and fusion with adjacent particles.
    BE2019 / 5587 The term "proximal", as used herein, has its usual meaning, that is, it is located near, near, next to, closest to, adjacent, adjacent to, contiguous. The term "distal," as used herein, has its usual meaning, that is, it is away from, farthest from.
    Embodiments of the articles of the invention are now described. It is to be understood that technical features described in one or more embodiments can be combined with one or more other embodiments, without departing from the scope of the invention and without generalizing it.
    In a first aspect and with reference to Figures 1 and 2, the invention described herein relates to an absorbent article 1, preferably an incontinence diaper, more preferably a trouser-like incontinence diaper, having a longitudinal axis YY and a transverse axis XX, comprising a chassis 2 having a skin-facing side, a garment-facing side opposite the skin-facing side, a front waist region 3, a rear waist region 4 and a crotch region 5 extending between the front and rear waist regions 3, 4; a liquid-absorbing member 6 having a front and a rear end 7, 8 extending across the crotch region 5 to the front and rear waist regions 3, 4, the liquid-absorbing member comprising a liquid-absorbing core 9, the liquid-absorbing core 9 having a front and rear has ends 10, 11; and an elastic web material 12 that is contractably connectable to at least the rear waist regions 4 under tension on the transverse axis XX, the front and rear waist regions 3,4 comprising front and rear waist ends 13, 14 and front and rear waist side edges 15, 15 ', 16, 16' which extend along a direction parallel to the longitudinal axis YY and where, when the front and rear waist regions 3, 4 are joined, preferably along front and rear waist side edges, a waist opening becomes formed by the front and rear waist ends 13, 14 and a pair of leg openings are formed by one or more cross leg circumference edges 17, 17 'and front and rear waist leg circumference edges 18, 18', 19, 19 ', and wherein first and second front waist-leg circumference edges 18, 18 'extending from a first position 20, 20' located proximal of crotch region 5 to a second position 21,21 'located distal therefrom and proximal to a front waist-side edge 15, 15 ', wherein the and second front waist-leg circumference edges 18, 18' are positioned opposite each other from the longitudinal axis YY and wherein first and second rear waist-leg circumference edges 19, 19 'extend from a third position 23, 23 'which is proximal of the crotch region 5 to a fourth position 24, 24' which is distal thereof and proximal to a rear waist-side edge 16, 16 ', the first and second rear waist leg circumference edges 19, 19' juxtaposed from the longitudinal axis YY This is characterized in that the distance D, which extends parallel to the longitudinal axis YY, between the front waist end 13 and a fifth position 22, 22 'along the first and second front waist leg circumference edges 18, 18 'closest to the front waist end 13 is less than the length L of a front waist side edge 15, 15' extending parallel to the longitudinal axis YY.
    BE2019 / 5587 It has been established that the creation of such a negative geometric shape, i.e. void shapes, in the front waist area provides for an improved snug fit especially in the crotch area of the wearer: fewer folds are brought about, increasing comfort and minimizing the visibility of the product through the wearer's clothes. In addition, the reduction of folds, allowing the liquid to flow out, reduces the risk of leakage.
    The present invention is suitable for open diapers, where the front and rear waist regions 3, 4 may be joined together, for example, by means of strips or hook-loop fasteners. The present invention is particularly suitable for pants-like diapers, wherein the front and rear waist regions 3, 4 may be joined along front and rear waist side edges, for example, by seams.
    In other words, the first position 20, 20 'and the third position 23, 23' are in the places where the leg circumferential edges 17, 17 ', 18, 18', 19, 19 'defining the leg openings are the liquid-absorbing member 6 'crosses'. In general, these positions correspond to the points where the angle of the leg opening edge changes most abruptly (i.e. the point where the speed of change of the angle of the leg opening edge relative to the transverse direction is highest is). The crotch area 5 is then determined as the area provided within the first position 20, 20 'and the third position 23, 23'.
    The absorbent article according to the invention also comprises an elastic web material 12 'which can be contractually connected to the front waist region 3 under tension on the transverse axis X-X. This allows the item to closely follow the shape of the anatomy of the wearer's abdomen.
    According to a preferred embodiment, each of the first and second front waist region leg circumferential edges 18, 18 'extend in an inwardly curved, i.e. concave, manner opposite directions from the longitudinal axis Y-Y. This can further promote the good fit in the crotch area of the wearer.
    Preferably, the ratio of the distance D to the length L is at least 30% or at least 35%, more preferably at least 40% or at least 45%, even more preferably at least 50% or at least 55 %. This is preferably at most 95% or at most 90%, more preferably at most at most 85% or at most 80%, even more preferably at most 75% or at most 70%. D / L is preferably in the range from 45% to 80%, more preferably in the range from 50% to 75%, even more preferably in the range from 55% to 70%. Indeed, it has been determined that if the negative geometric shape is too deep, i.e. D is too short compared to L, the article may be uncomfortable to wear and / or the elastic web material may lose 12 'tension, whereby unacceptable creases can thus be achieved
    BE2019 / 5587. In addition, it can negatively affect the fit at the back of the absorbent article.
    A sixth position 25, 25 'is defined along the first and second front waist leg circumference edges 18, 18' which is proximal to the crotch region 5 and is spaced from the front waist end 13 parallel to the longitudinal axis YY equal to L. The negative geometric shape can then be further determined by the ratio E versus C, where C is determined as the opening of the negative geometric shape, at a distance L from the front waist end 13, i.e. say the distance extending parallel to the transverse axis XX between the sixth position 25, 25 'and the second position 21, 21' and E is determined as the depth of the negative geometric shape, which extends parallel to the longitudinal axis YY, where E equals L minus D. Such an E / C ratio is preferably at least 10% or at least 12%, more preferably at least 15% or at least 20%. It is preferably at most 40% or at most 35%, more preferably at most 30%. Preferably E / C is in the range of 10% to 35%, more preferably in the range of 12% to 32%, even more preferably in the range of 15% to 32%. Indeed, it has been determined that at an equivalent ratio D / L, if the first position 20, 20 'is closer to the front waist end 13, i.e. C is longer, some people may experience less comfort and fit. For this reason and to minimize leakage, the distance parallel to the longitudinal axis Y-Y between the first position 20, 20 'and the front waist end 13 is greater than L.
    Preferably, the article is free from an elastic band proximally and substantially parallel to the first and second front waist-leg circumference edges 18, 18 'to prevent smocking. Rather, the negative geometric shape is seen as an interruption in the continuation of the elastic web material 12 '.
    It may be helpful to ensure that a portion of the first and second front waist region leg circumference edges 18, 18 'are proximal to the front waist side edges 15, 15' substantially parallel to the front waist end 13. Under "Substantially parallel" is understood herein to be either strictly parallel or with a deviation from strict parallelism which is at most 5 °, preferably at most 3 °. This portion may have a length substantially parallel to the front waist end which is at least 5mm, preferably is at least 7mm, and / or is at most 15mm, preferably at most 13mm, measured along the transverse axis (XX). This length may preferably depend on the size of the absorbent article, and in particular the ratio between the length of the portion which is substantially parallel to the front waist end and the length of the front waist end, both measured along the transverse axis (XX) is preferably in the range from 1.20 to 1.80, or in the range from 1.30 to 1.70, more preferably in the range from 1.35 to 1, 65. This can contribute to the manufacturing process, if the articles are still in the form of a continuous belt
    BE2019 / 5587 of products, to ensure the firmness between two successively connected absorbent articles, prior to the step of cutting into separate pieces.
    A first region A1 (gridded in Fig. 2) is defined between the first and second front waist region leg circumference edges 18, 18 ', between the first and sixth positions 20, 20', 25, 25 '; and a second region A2 (gridded in Fig. 2) is defined between the first and second rear waist leg circumferential edges 19, 19 ', between the third and fourth positions 23, 23', 24, 24 '.
    In the present invention, at least 50% of the total surface area of the chassis 2 comprises the elastic band material 12, 12 ', each of the first and second areas A1, A2 being made substantially elastic, and the surface area of the elasticized first area A1 is from 3% to 35%, preferably from 3% to 30%, more preferably from 3% to 25%, even more preferably from 3% to 20%, of the surface area of the elastic created second region A2, measured in an extended state. Elasticizing substantially the entire region between the opposing waist-leg circumference edges provides a better, snug fit in the transition region of the sides between crotch and leg opening, which minimizes its visibility through a wearer's clothing. However, this can increase the risk of leakage from the lateral sides, especially in the case of folds through which the liquid can flow. By ensuring that the surface area A1 is sufficiently small compared to A2, but if A1 is too small, the loose areas formed by a front-to-back disproportionate stress create a greater risk of leakage, making it therefore desirable to cover the areas A1 and A2 to give the dimensions described herein. For the avoidance of doubt, the term "surface area", as used herein, means the surface area taken around a flat plane that coincides with (or is formed by) the longitudinal axis YY and the transverse axis XX when the article is flat (or stretched) as shown in the figures.
    In one embodiment, the surface area of the elasticized first region A1 covers from 5% to 18%, preferably from 7% to 15%, more preferably from 8% to 15% of the surface area of the elasticized second region A2. measured in a stretched state.
    In a highly preferred embodiment, at least 70%, preferably at least 80%, more preferably between 83% and 99% of the total surface area of the chassis 2 consists of the elastic web material 12 , 12 '. An advantage of this device is that a more underwear-like fit is obtained, as well as better adhesion to the body.
    In one embodiment, the first and second regions A1, A2 comprise the elastic web material 12, 12 ', which material 12, 12' is provided to provide elasticity to the first and second regions A1, A2.
    BE2019 / 5587 In a preferred embodiment, each of the first and second rear waist leg circumference edges 19, 19 'extends obliquely and along opposite directions of the longitudinal axis YY and preferably in a substantially linear and / or curved manner such that the third positions 23, 23 'and the fourth position 24, 24' are separated along a first distance A extending parallel to the longitudinal axis YY, and further separated along a second distance B extending perpendicular to the longitudinal axis YY and parallel at the transverse axis XX, and wherein the distance ratio A / B is greater than 0.5, preferably between 0.5 and 0.8, more preferably between 0.5 and 0.7, and according to an even greater preference is between 0.5 and 0.65. Such a specific leg cut may not only affect comfort, but also the risk of leaking. In particular, by ensuring that the leg cut on the rear portion is within the specified margins, the risk of creases forming at the rear can be reduced and leakage prevention improved.
    According to one embodiment, the article has a front half defined by the edges of the article and a transverse centerline XX of the article, and a rear half defined by the edges of the article and a transverse centerline XX of the article. the article, and a surface area of the front half is preferably within the range of 60 to 90%, more preferably within the range of 70 to 90%, and even more preferably within the range of 70 to 80% of an area of the rear half, measured in an extended state of the article. This can provide a trouser-like shape of the absorbent article.
    In a further embodiment, the article has a maximum width in the transverse direction and a maximum length in the longitudinal direction, and the ratio between the maximum width and the maximum length of the article is between 80% and 120%, preferably between 90% and 115 %, measured in an extended state of the article. According to a preferred embodiment, the ratio between the distance extending parallel to the longitudinal axis YY between the first position 20, 20 'and the front waist end 13 and the maximum width of the article is between 25% and 50%, preferably between 35 % and 45%, measured in a stretched state of the article. The articles that meet these measurements can provide a trouser-like shape of the absorbent article and a more secure fit.
    In one embodiment, the liquid-absorbing core 9 extends along the longitudinal axis YY over one or more elasticized materials 12, 12 'and both the front and rear ends 10, 11 of the core 9 are in the first and second regions, respectively. A1, A2 so that at least 40%, preferably between 40% and 75% of the total surface area of the liquid-absorbing core 9 is in the elasticized first and second areas A1, A2. An advantage of this device is that it provides a well-fitting core that does not protrude, providing a discrete profile that comfortably adheres to the wearer's body.
    BE2019 / 5587 In one embodiment, the first and second regions A1, A2 comprise the elastic web material 12, 12 'provided to provide an elongation of 200 to 300% measured according to the method described herein. It has been found that if the elastic web material 12, 12 'has an elongation of less than 200%, the resulting substrate is too loose, leading to an increased risk of leakage. On the other hand, if the elongation exceeds 300%, the substrate becomes too tight, limiting freedom of movement and increasing the risk of skin irritation.
    In one embodiment, the first and second regions A1, A2 each have a total elasticized surface corresponding to more than 80%, preferably more than 85%, more preferably from 90% to 99%, of the total surface area of the first and second areas A1, A2. An advantage of this embodiment is that it is ensured that the product effectively follows / adapts to the curves of the wearer. Since each person can have a different shape, it is very advantageous if the article can adjust accordingly.
    In one embodiment, the elastic web material 12, 12 'is selected from the group consisting of an elastic film, elastic fibers, elastic bands, elastic networks, elastic nonwoven materials and combinations thereof. Examples of suitable elastic networks are elastic extruded square mesh, which is, for example, manufactured by Conwed® global netting solutions.
    The elastic web material 12, 12 'preferably comprises a breathable elastic laminate which preferably comprises an elastic film interposed between two elastic or inelastic nonwoven substrates. In this embodiment, the elastic web material 12, 12 'can be made breathable during the joining process, for example by ultrasonically bonding to the respective segments of the chassis 2. An advantage of this device is that during the joining process, micro-openings are formed by the elastic web material 12, 12 'without the need for a specific pre- or post-treatment.
    The elastic laminate may contain a first and second layer of fiber material and an elastic film layer interposed between the first and second fiber layers, the fiber layers being in the form of nonwoven layers. Alternatively, similar elastic laminates can be made by laminating at least two nonwoven layers together, wherein at least one or two nonwoven layers comprise an elastic nonwoven material. This device allows for a more exquisite feel and the wearer experiences it more as traditional underwear, not only in appearance, but also in the way it feels and behaves.
    0120-00WO
    BE2019 / 5587 The elastic laminate can have a water vapor transmission rate in accordance with the ASTM E96-00
    2
    Procedure D having at least 1800 or 1900 g / m, preferably at least 2000 or 2500 g / m 2 more preferably at least 3000 g / m, according to a yet more preferably from 3200 to 5000 g / m 2, per 24 hours.
    In one embodiment, the portion of the crotch region between the first and second regions A1, A2 comprises one or more non-elastic materials (such as one or more nonwoven materials as described above), which are usually arranged such that the region is substantially inelastic ( i.e. usually free from elastic web material such as elastic films and the like). An advantage of this device is a cost saving, since elastic material can be omitted in this particular area, as it is believed to have no adverse effect on comfort and leak prevention as long as elastic web material is present in the leg areas, as described in the previous embodiments. Without wishing to be bound by theory, it is further believed that there would be a greater risk of wrinkling if this area had been made elastic (i.e. had a continuous elasticized surface from the front to the back waist area), which would lead to undesirable skin irritation, discomfort as well as an unpleasant aesthetic appearance. It is therefore desirable that a portion of the crotch region 5 between the first and second regions A1, A2 remain inelastic to provide non-continuous elasticity between the front waist region 3 and the rear waist region 4.
    In one embodiment, at least one of the elastic web materials continuously extends between the opposed lateral edges 15, 15 ', 16, 16' of each of the front and rear waist regions 3, 4. By ensuring that at least one of the elastics on each front / rear area is not deactivated, a better overall elasticity and fit is achieved.
    In a preferred embodiment (not shown), at least the front waist region 3 comprises a series and / or pattern of continuous or non-continuous joints arranged to provide at least one further region with an extension different from the extension of adjacent parts of the front waist region 3. More preferably, the continuous or non-continuous connections are arranged to substantially encircle at least one of the further regions, which are preferably located at a position proximal to the crotch region 5 so as to decrease elasticity within the substantially surrounded further region, preferably forming a pocket with a smaller extension than the extension of adjacent surfaces outside the substantially surrounded further region. This embodiment is particularly advantageous for providing a better underwear-like fit, especially for male wearers.
    In one embodiment, the absorbent core can comprise superabsorbent polymer (usually in the form of particles) and / or cellulose fibers (or down). Because of high concentrations
    BE2019 / 5587 super absorbent particles, or other high absorbing material, in the holding part (i.e. the part in the crotch area exposed to the greatest secretion flow), it may be more difficult to hold the high absorbing particles in the holding part and the movement or limit migration of the superabsorbent particles to the body side of the pants. To improve retention of the highly absorbent material, the absorbent construction may include an improved wrap, such as a wrap sheet, placed immediately adjacent to and around the retention member. The wrap sheet is preferably a layer of absorbent material that largely covers the body side and exterior surfaces of the retention member, and preferably encloses substantially all of the peripheral edges of the retention member to form a substantially complete enclosure around it. Alternatively, the wrapper sheet may provide an absorbent wrap that largely covers the body side and outside surfaces of the retention member and envelops substantially only the lateral side edges of the retention member. Accordingly, both the linear and the inwardly curved parts of the lateral side edges of the wrapping sheet would close around the holding part. In such an arrangement, the end edges of the wrapping sheet cannot fully close around the end edges of the holding portion at the waist regions of the article. The wrapping sheet may comprise a multi-element wrapping sheet comprising a separate wrapping layer on the body side and a separate wrapping layer on the outside, each of which extends beyond all or some of the peripheral edges of the holding member. Such a configuration of the wrapping sheet may, for example, allow the formation of a substantially complete seal and closure around the peripheral edges of the holding member. The layers of the wrapper sheet on the body side and outside can consist of mainly the same material or of different materials. For example, the layer on the outside of the wrapping sheet may consist of a material having a relatively lower basis weight and a relatively high porosity, such as a wet cellulose mesh of soft wood pulp. The body side layer of the wrap sheet may comprise any of the wrap sheet materials described above (e.g., a meltblown web consisting of meltblown polypropylene fibers or a web of low porosity cellulose gauze consisting of a mixture of hardwood / softwood fibers) that is relatively low in porosity has. The low porosity body side layer is better able to prevent the migration of superabsorbent particles to the wearer's skin, and the low base weight, high porosity outer layer can help reduce costs.
    In one embodiment (not shown), the crotch portion of the absorbent article preferably includes opposed longitudinal side members that comprise a set of elasticated, longitudinally extending "leg hems". The leg hems are typically adapted to fit around a wearer's legs in use and serve as a mechanical barrier against the lateral flow of body secretion. Leg cuffs are made elastic by leg elastics. The diaper can also have a front waist elastic and a rear waist elastic
    BE2019 / 5587. Materials suitable for use in shaping leg elastics are known to those skilled in the art. Examples of such materials are strands or strips of a polymeric, elastomeric material that attach to the legband of the diaper when it is in a stretched position or that are attached to the diaper while the diaper is folded such that elastic, contractive forces be given to the leg hems. Examples of suitable elastomeric materials that can be used are polyether polyamide block copolymers, polyurethanes, synthetic linear ABA and AB block copolymers, blends of chlorinated rubber / EVA (ethylene vinyl acetate), EPDM (ethylene propylene diene monomer) rubbers, EPM (ethylene propylene monomer) rubbers, mixtures of EPDM / EPM / EVA and the like.
    Method for measuring the extension
    The purpose of this test method is to determine the elasticity of elastic web materials in incontinence pants to ensure the usability of the pants. The trousers are placed in a mounting frame and the elongation percentage is determined at pre-specified forces.
    Material: Tensile tester [such as Zwick / Roell Z1.0] with constant stretching rate, calibrated according to manufacturer's instructions; clamps and claws: each claw surface must be smooth, flat, have a metal surface and measure 30 x 60 mm. The planes must be parallel to each other and the centers of the planes of one clamp and those of the corresponding claw plane of the other clamp must be aligned; mounting frame: contains an upper and lower device that is placed between the clamps.
    Procedure: The pants are placed over a mounting frame on the tensile testing machine and stretched at a constant stretching rate. The values of the extension of the test products are obtained via a computer interface.
    Definitions: Elongation: The deformation in the direction of the load applied by a tensile force. Elongation is usually expressed as a percentage of the length of the stretched material in relation to the length of the unstretched material (= distance between frame ends at the start of the test - LE); Stretch: the change in the length of a material as a result of stretching.
    Verification of equipment: Verify the measuring cell: a calibrated verification weight of 500 g should yield a force of 4.90 (5) N ± 0.10 N.
    Parameters of equipment: The following parameters are programmed: Preload: 0.1N; Crosshead speed: 300 mm / min; End of test: 22N
    BE2019 / 5587
    Calibration length LE (mm) must be adapted to the waist size of the trousers: small 220; medium
    250; large 250; extra large 270
    Procedure: Assemble the mounting frame and set the measuring cell to zero; adjust the calibration length according to the waist size; carefully slide the pants over the mounting frame; set the measuring cell to zero; start the tensile force (N) and the measurements on the test track (mm) will be stored until a force of 22N is reached; repeat for at least 5 products.
    Calculation: For each product, record the extension value at standard forces 2N and 20N. Measure the length increase from the beginning of the force-elongation curve to the point corresponding to the pre-specified force. Calculate the elongation as the percentage of the length increase based on the calibration length for both 2N and 20N.
    EXAMPLES
    Example 1:
    Four identical pants samples are manufactured with different values for (i) D / L ratio and further (ii) E / C ratio. The samples are randomly handed out to a group of panel members (at least 3). Panelists are instructed to wear the samples and each rate from poor to excellent for fit and comfort. The results are noted. Table 1 summarizes the results, that is, the percentage of panelists who gave each of the indicated scores.
    Table 1 - Effect of D / L and E / C ratios on fit and comfort
    Analysis material D / L (%) E / C (%) Bad(% of panel members) Sufficient (% of panel members) Good(% of panel members) Excellent (% of panel members) 1 66 28.6 - - 17% 83% 2 66 26.6 - 8% 75% 17% 3 100 - - 92% 8% - 4 34 54.4 100% - - -
    Sample 3 is a pants according to European patent application EP17159249.6 filed March 3, 2017. It does not have a negative geometric shape according to the present invention.
    Figures 3 and 4 are front views of Sample 1 and Sample 3, respectively, placed on a mannequin. Figure 3 clearly shows the perfect fit of the article in the front part of the mannequin, especially in the crotch area, where folds and pleats are not visible. This shows
    BE2019 / 5587 also the good fit of the entire article on the body. Figure 4, on the other hand, shows folds (26) in the crotch region, pleats (27) on the front part of the leg, and folds that create an elongated protrusion (28) a few centimeters above the leg opening. Sample 3 follows the buttock folds, while Sample 1 follows the crotch area further. The latter form can also release pressure on the thigh, preventing signs on the skin.
    Example 2:
    Seven identical pants samples are manufactured with different values for (i) D / L ratio and further (ii) E / C ratio. The A1 / A2 ratio was kept around 6% for all samples B to G, and was around 8% for sample A. The samples are randomly distributed to a group of panelists (at least 3). Panel members are instructed to wear the samples and to rate each from very poor (= 1) to very good (= 7), both in terms of fit and comfort. The results are noted. Table 2 summarizes the results, that is, the percentage of panelists who gave each of the indicated scores.
    Table 2 - Effect of D / L and E / C ratios on fit and comfort
    % of the panel members Analyzes material D / L (%) E / C (%) Very bad= 1 2 3 4 5 6 Very good =7 a 100 - 50% 33% 17% B 94 5 17% 50% 33% C 82 15 17% 83%D 71 25 16.5%16.5% 67% E 65 30 17%50%33% F 59 3583% 17% G 47 45 100%
    Sample A is a pants according to European patent application EP17159249.6 filed March 3, 2017. It does not have a negative geometric shape according to the present invention.
    This second panel test clearly demonstrates the preference of the panel members for the samples with an E / C ratio of 15, 25 or 30%.
    It is believed that the present invention is not limited to any of the embodiments described above and that changes to the described manufacturing example can be made without reconsidering the appended claims.
    权利要求:
    Claims (14)
    [1]
    BE2019 / 5587 CONCLUSIONS
    Absorbent article (1), preferably a pants-like incontinence diaper, having a longitudinal axis (Y-Y) and a transverse axis (X-X), comprising:
    a chassis (2) with a skin-facing side, a garment-facing side opposite the skin-facing side, a front waist region (3), a rear waist region (4) and a crotch region (5) located extends between the front and rear waist region (3, 4);
    a liquid absorbing member (6) with a front and rear end (7, 8) extending across the crotch region (5) to the front and rear waist region (3, 4), the liquid absorbing member including a liquid absorbing core (9), the liquid absorbent core (9) having a front and rear end (10,11); and an elastic web material (12, 12 ') that can be contractually tensioned on the transverse axis (XX) with at least each of the front and rear waist regions (3, 4), the front and rear waist regions (3, 4) front and rear waist ends (13,14) include and front and rear waist side edges (15, 15 ', 16, 16') extending along a direction parallel to the longitudinal axis (YY) and where, when the front and rear waist regions (3, 4) are joined, preferably along front and rear waist side edges, a waist opening is formed by the front and rear waist ends (13, 14) and a pair of leg openings are formed by one or more crotch leg circumference edges (17, 17 ') and front and rear waist-leg circumference edges (18, 18', 19, 19 '), with first and second front waist-leg circumference edges (18, 18') extending from a first position (20, 20 ') that is proximal from the crotch region (5) to a second position ie (21, 21) thereof and proximal to a front waist-side edge (15, 15 '), wherein the and second front waist leg circumferential edges (18, 18') are positioned opposite each other from the longitudinal axis (YY) and wherein first and second rear waist-leg circumference edges (19, 19 ') extending from a third position (23, 23') proximal of the crotch region (5) to a fourth position (24, 24 ') thereof and proximal of a posterior waist-side edge (16, 16 '), with the first and second rear waist leg circumference edges (19, 19') positioned opposite each other from the longitudinal axis (YY), with a fifth position (22, 22 ') determined along the first and second front waist leg circumference edges (18, 18 ') closest to the front waist end (13) with a sixth position (25, 25') defined along the first and second front waist leg circumference edges (18 , 18 ') which is proximal to the crotch region (5) and is spaced from the front waist end ( 13) parallel to the longitudinal axis (Y-Y) equal to L,
    0120-00WO
    BE2019 / 5587 wherein a first region (A1) is defined between the first and second front waist region leg circumference edges (18, 18 ') between the first and sixth positions (20, 20', 25, 25 '), wherein a second region ( A2) is defined between the first and second rear waist-leg circumference edges (19, 19 ') between the third and fourth positions (23, 23', 24, 24 '), characterized in that distance D extending parallel to the longitudinal axis (YY) between the front waist end (13) and the fifth position (22, 22 '), is less than the length L of a front waist-side edge (15, 15') extending parallel to the longitudinal axis (YY), which comprises at least 50% of the total surface area of the chassis (2) the elastic band material (12, 12 '), and each of the first and second areas (A1, A2) are made substantially elastic, and that the surface area of the elasticized first region (A1) consists of 3% to 35% of the surface area of the elasticized second region (A2) measured in a stretched state.
    [2]
    The absorbent article (1) of claim 1, wherein each of the first and second front waist leg circumference margins (18, 18 ') extend in an inwardly curved manner along opposite directions from the longitudinal axis (Y-Y).
    [3]
    The absorbent article (1) according to any of the preceding claims, wherein the ratio of the distance D to the length L is in the range from 45% to 80%, preferably in the range from 50% to 75%, according to a more preferred range is from 55% and 70%.
    [4]
    The absorbent article (1) according to any of the preceding claims, wherein a sixth position (25, 25 ') is defined along the first and second front waist-leg circumference edges (18, 18') located proximal of the crotch region ( 5) and at a distance from the front waist end (13) parallel to the longitudinal axis (YY) equal to L, and with a distance C between the sixth position 25, 25 'and the second position 21, 21' and a distance E, where E = L - D, are related such that E / C is in the range of 10% to 35%, preferably in the range of 15% to 32%.
    [5]
    The absorbent article (1) according to any one of the preceding claims, wherein a distance extending parallel to the longitudinal axis Y-Y between the first position (20, 20 ') and the front waist end (13) is greater than L.
    [6]
    The absorbent article (1) according to any of the preceding claims, wherein the article is free of an elastic band proximal to and substantially parallel to the first and second front waist leg circumferential edges (18, 18 ').
    0120-00WO
    BE2019 / 5587
    [7]
    The absorbent article (1) according to any of the preceding claims, wherein a portion of the first and second front waist region leg circumference edges 18, 18 'proximal to the front waist end 15, 15' is substantially parallel to the front waist end 13.
    [8]
    The absorbent article (1) according to any of the preceding claims, wherein the surface area of the elasticized first region (A1) consists of 5% to 18%, preferably 7% to 15%, more preferably between 8% and 15% of the surface area of the elasticized second region (A2), measured in an elongated state.
    [9]
    Absorbent article (1) according to any of the preceding claims, wherein at least 70%, preferably at least 80%, more preferably between 83% and 99% of the total surface area of the chassis (2) consists of an elastic web consisting of material (12, 12 ').
    [10]
    The absorbent article (1) according to any of the preceding claims, wherein the first and second regions (A1, A2) comprise the elastic web material (12, 12 '), which material (12, 12') is arranged to provide elasticity to the first and second regions (A1, A2).
    [11]
    The absorbent article (1) according to any of the preceding claims, wherein each of the first and second rear waist-leg circumference (19, 19 ') extends substantially obliquely and along opposite directions from the longitudinal axis (YY) and preferably on a substantially linear and / or curved manner such that the third position (23, 23 ') and the fourth position (24, 24') are separated from each other along a first distance (A) extending parallel to the longitudinal axis (YY ), and further separated by a second distance (B) extending perpendicular to the longitudinal axis (YY) and parallel to the transverse axis (XX), the distance ratio (A / B) being greater than 0.5 , preferably is between 0.5 and 0.8, more preferably is between 0.5 and 0.7, and even more preferably is between 0.5 and 0.6.
    [12]
    The absorbent article (1) according to any preceding claim wherein the liquid absorbent core (9) extends along the longitudinal axis (YY) over the elastic web material (12, 12 '), and wherein both the front and rear end (10, 11) of the core (9) are placed in the first and second regions (A1, A2), respectively, so that at least 35%, preferably at least 40%, more preferably between 40% and 100% , even more preferably, between 40% and 75% of the total surface area of the liquid-absorbing core (9) is within the elasticized first and second areas (A1, A2).
    [13]
    The absorbent article (1) according to any of the preceding claims, wherein the elastic web material (12, 12 ') is selected from the group consisting of a
    0120-00WO
    BE2019 / 5587 elastic film, elastic fibers, elastic bands, elastic networks, elastic non-woven materials and combinations thereof.
    [14]
    The absorbent article (1) according to any of the preceding claims, wherein the portion of the crotch region between the first and second regions (A1, A2) comprises one or more inelastic materials 5, which are usually arranged such that the region is substantially inelastic .
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    同族专利:
    公开号 | 公开日
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    法律状态:
    2020-05-04| FG| Patent granted|Effective date: 20200330 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP18192449.9A|EP3620143A1|2018-09-04|2018-09-04|Elasticised absorbent article|
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