• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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  • 优先权
    • 专利摘要:
    A diaper, wherein the absorbent structure comprises at least 40 weight percent of the superabsorbent material based on the total weight of the absorbent structure in the dry state in the areas or areas where the superabsorbent material is dispersed, wherein the superabsorbent material is only partially neutralized. Absorbent structures of absorbent articles, such as articles such as urinary incontinence guards, sanitary napkins, panty liners and the like. An absorbent article comprising an absorbent structure.
    公开号:KR20010101227A
    申请号:KR1020017007467
    申请日:1999-12-15
    公开日:2001-11-14
    发明作者:베리스 포르쇠；울리카 하그루트；아이드룹 마리에 루이제 라거스테트；얀 한손
    申请人:에스체아 히기에너 프로덕츠 악티에볼라그；
    IPC主号:
    专利说明:

    Absorption structure of an absorbent article comprising a partially neutralized superabsorbent material, and absorbent article including the absorbent structure TECHNICAL FIELD
    [2] The absorbent article typically includes a top liquid permeable sheet, an absorbent sheet and a bottom liquid impermeable barrier sheet, which are bounded by two transverse edges and two longitudinal edges. The article includes a front part and a back part, between which there is a crotch with a wet area through which most of the body fluid is delivered. The absorbent sheet, or layer, will sometimes include superabsorbent material.
    [3] Superabsorbent materials exist in the form of particles, for example, in the form of grains, granules, flakes or fibers, and are mixed or layered with other absorbent materials, usually cellulose fibers. Superabsorbent materials are polymers that can absorb water and body fluids such as urine and blood and swell and form water insoluble gels. Some superabsorbent materials can retain the absorbed liquid even when external pressure is applied. These materials have been widely used in absorbent hygiene products such as diapers, sanitary napkins, incontinence guards and the like.
    [4] The effectiveness of the superabsorbent material depends on many factors, such as how it is incorporated into the absorbent structure, particle shape and particle size, and also depends on physical and chemical properties such as absorption rate, gel strength and liquid retention properties. The absorbent capacity of the superabsorbent can be negatively affected by a phenomenon known as gel blocking. Gel blocking is the formation of a superabsorbent material, which, when wetted with an absorbent article, forms a gel that blocks pores in the fibrous structure or blocks gaps in the particles. The blocking prevents the transfer of the liquid from the wet area to the rest of the absorber and makes the total absorbent capacity of the absorber unusable and also creates a risk of leakage.
    [5] For the purpose of reducing the problems caused by gel blocking, for example, using superabsorbent particles surrounded by a slowly melting casing and / or penetrated by the absorbed liquid is to provide an extended active time to the superabsorbent material. Known. Previously disclosed WO 95/00183 discloses an absorbent article having an absorbent structure comprising a superabsorbent material having an extended active time in the wetted region of the structure, in which conventional superabsorbent materials are known as such wetted regions. Located outside of.
    [6] The problem of gel blocking can also be reduced by using superabsorbent materials with high gel strength. High gel strength superabsorbent materials can retain the absorbed liquid even when the swollen material is subjected to an external load, and can also absorb a significant amount of liquid when subjected to an external load. EP 0 339 461 describes high gel strength superabsorbents for use in absorbent articles. This superabsorbent can maintain its shape to a great extent and will not break when swollen.
    [7] EP 0 532 002 discloses a high gel strength superabsorbent material which also has the ability to disperse liquids.
    [8] Therefore, as mentioned above, one problem with absorbent articles comprising superabsorbent materials is gel blocking. This increases the risk of leakage and makes it impossible to use the full capacity of the absorbent structure. Another disadvantage of conventional superabsorbents is found in that they swell to a significant extent. High concentrations of superabsorbents can swell into large chunks at wet spots, thus causing discomfort to the wearer after the article is wet.
    [9] The problem of the present invention is to provide a solution to these problems.
    [1] FIELD OF THE INVENTION The present invention relates to absorbent structures of absorbent articles, such as articles such as diapers, panty diapers, incontinence guards, sanitary napkins, panty liners, and the like, including partially neutralizing superabsorbent materials, and also relates to absorbent articles including the absorbent structures. .
    [15] 1 shows the bag used in the test of Example 1. FIG.
    [16] FIG. 2 shows the results from Example 1 in the form of a curve plotting absorption over time.
    [10] Summary of the Invention
    [11] The present invention is directed to an absorbent structure comprising only partially neutralized superabsorbent materials that do not swell to the same extent as conventional superabsorbent materials, so that higher superabsorbent concentrations can be used. Compared with conventional superabsorbent materials, the partially neutralizing superabsorbent materials absorb the liquid more slowly and so may disperse the liquid more before it swells. Conventional superabsorbent materials have a degree of neutralization of about 70%.
    [12] FIELD OF THE INVENTION The present invention relates to absorbent structures of absorbent articles, such as articles such as diapers, panty diapers, incontinence guards, sanitary napkins, panty liners, and the like, the structures of which are in a dry state or regions where superabsorbent material is dispersed. At least 40 weight percent of superabsorbent material, based on the total weight, wherein the superabsorbent material has a degree of neutralization between 20 and 50%.
    [13] The invention also relates to an absorbent article comprising an absorbent structure.
    [14] One advantage obtained by the present invention is that it can provide the absorbent article with the comfort that the article of the invention is comfortably and separately worn. Another advantage provided by the partially neutralizing superabsorbent is that it prevents the occurrence of odor and dermatitis when the absorbent article is worn.
    [17] Description of the invention
    [18] The present invention relates to an absorbent structure comprising a partially neutralizing superabsorbent material. The above problems are due to the fact that the partially neutralized superabsorbent material does not swell to the same extent as conventional superabsorbent materials, i.e. superabsorbent materials having a neutralization degree of about 70%, and absorbs liquid more slowly than the conventional superabsorbents. Will be solved.
    [19] The crosslinked polyacrylates of the kind described in the European patent specification EP 0 391 108, Casella AG are one example of one suitable partially neutralizing superabsorbent material which can be used according to the invention.
    [20] Superabsorbents of this kind that do not swell to the same extent as superabsorbent materials with higher neutralization mean that the superabsorbent absorbs less in the swollen state. As a result, there is less risk that the superabsorbent material, when swollen, prevents the transport of liquid through the pore structure surrounding the superabsorbent material / superabsorbent particles. Moreover, the partially neutralizing superabsorbent material according to the invention absorbs liquid more slowly than the superabsorbent material with higher degree of neutralization. This slow absorption rate of the partially neutralizing superabsorbent can disperse a significant amount of liquid from the wet spot to other parts of the absorbent structure and make more use of the total absorbent capacity of the article. The examples given below show that the partially neutralizing superabsorbent materials according to the invention absorb slower and less amounts of liquid than conventional superabsorbent materials.
    [21] Superabsorbents include crosslinked polymeric acrylic acid. Ion complexes of COO - and Na + or K - are formed in the neutralization process. When the liquid is absorbed, ion exchange occurs between Na + and other ions. Partially neutralized superabsorbents contain less ions (COO − ) than conventional superabsorbents. The fact that ions (COO − ) are available for liquid absorption and that fewer ions (COO − ) are available means that the partially neutralizing superabsorbent has a rather low absorption capacity. Many carboxylic acid groups will be present and will provide the superabsorbent with a pH lower than that of conventional superabsorbents even if these groups do not contribute to absorption.
    [22] Since the superabsorbent used in accordance with the invention absorbs less amount of liquid, higher concentrations of superabsorbent can be given to the article without the inconvenience of wearing after wet. According to the invention, with respect to the partially neutralizing superabsorbent material in excess of 40% by weight of the superabsorbent material calculated for the total dry weight of the absorbent structure in the region or zones in which the superabsorbent material is dispersed, the same high degree. It can be used without the above-mentioned problem occurring.
    [23] Therefore, this problem is solved by the partially neutralized superabsorbent. The degree of neutralization is 20 to 50% compared to the degree of neutralization of about 70% in the case of conventional superabsorbent materials.
    [24] As mentioned above, the partially neutralized superabsorbent used in the absorbent structure according to the invention has lower absorption capacity and slower liquid absorption rate than the conventional superabsorbent. Since the liquid is absorbed more slowly by the superabsorbent of the invention, it takes more time for the liquid to disperse in the absorbent layer. The superabsorbent particles therefore do not prevent the liquid from being transferred to other parts of the absorbent structure to the same high degree. The low absorbency of the superabsorbent also means that this dispersion function will remain active for a long time. The superabsorbent particles will not swell to the same extent as conventional particles, reducing the risk of superabsorbent masses formed. Higher concentrations of superabsorbent are acceptable and smaller in size when absorbed may be provided in the same amount as some conventional superabsorbent particles that are larger when swollen. This also contributes to the reduction of lump formation. Therefore, a high concentration of partially neutralized superabsorbent material can be used in the absorbent structure, and an absorbent structure can be obtained with high total absorbent capacity and high liquid dispersion capacity while maintaining the comfort of the article even after wet.
    [25] Many embodiments will now be described which show that the partially neutralizing superabsorbent material according to the invention absorbs liquid at a slower rate and in a smaller amount than conventional superabsorbent materials.
    [26] Description of Example 1
    [27] The following examples are intended to illustrate that the partially neutralizing superabsorbents used in the structures according to the invention absorb less liquid and absorb liquid at a slower rate than conventional superabsorbers. The test was conducted by immersion absorption intended to determine the absorbency of the superabsorbent.
    [28] Device used
    [29] Polyester net, mesh size 59 μm
    [30] -Bonding equipment
    [31] -Test solution; Note below
    [32] -Scale, accuracy of 0.0001g
    [33] Test solution
    [34] Synthetic urine is prepared according to the following recipe:
    [35] Concentration Magnesium Sulfate (MgSO 4 )0.66 g / l Potassium Chloride (KCl)4.47 g / l Sodium Chloride (NaCl)7.60 g Urea (carbamide) (NH 2 CONH 2 )18.00 g / l Potassium Dihydrogen Phosphate (KH 2 PO 4 )3.54 g / l Sodium hydrogen phosphate (Na 2 HPO 4 )0.745 g / l Triton X-100 0.1%1.00 g / l Deionized water with 10% nicotine (colored)0.4 g / l
    [36] Way
    [37] Cut the polyester net into pieces of 7 x 12 cm and then melt the pieces together along its rim to form a bag.
    [38] -Marked on the bag.
    [39] Bag P was weighed with an accuracy of 0.0001 g.
    [40] 0.19-0.21 g of superabsorbent (S) was placed in the bag with an accuracy of 0.0001 g.
    [41] The superabsorbent was stirred.
    [42] -Melt the bags together and check their weight.
    [43] The superabsorbent material was evenly distributed in each bag and then the bag was carefully placed in the test solution to absorb the liquid.
    [44] The bag was placed once in the test solution and the absorption time for each bag was exactly 15 seconds. The same accuracy was applied for total absorption times of 5 minutes or less, but not for 30 and 60 minutes.
    [45] The bag was removed after 15 seconds and hung for 2 minutes to let the droplets run out. The bag was hung in one corner with the bag's unbonded bottom facing down.
    [46] See FIG. 1, which shows that the bag 1 is suspended from the ring 2 and includes three bonded edges 3 and a non-bonded edge 4 facing down.
    [47] Carefully wipe off any droplets formed on the bag.
    [48] The weight of the bag was A (15S) , i.e. the weight of the bag was measured after 15 seconds with an accuracy of 0.0001 g.
    [49] -Dip the bag and lift it up after 30 seconds, 45 seconds, 1,2,5,30 and 60 minutes of total absorption time, dropping A (30s) , A (45s) , A (1m) , A (2m) , A (5m) , A (30m) and A (60m) .
    [50] The test solution was changed after each test.
    [51] Calculations and obtained results
    [52] A (i) = sample weight after absorption, g
    [53] i = 15 seconds, 30 seconds, 45 seconds, 1 minute, 2 minutes, 5 minutes, 30 minutes, 60 minutes
    [54] P = weight of the empty bag, g
    [55] S = weight of superabsorbent, g
    [56] D (i) = sample absorption, g / g
    [57] K = bag absorption correction
    [58] i = K = 1.6 for 15 seconds, 30 seconds, 45 seconds, 1 minute, 2 minutes, 5 minutes, 30 minutes, and 60 minutes.
    [59]
    [60] The results are summarized in Table 1, where IM 7110 is a partially neutralized superabsorbent and IM 7100 is a conventional superabsorbent. It can be seen from the results that in the case of partially neutralizing superabsorbents, the IM 7110 absorption is always lower than that of conventional superabsorbents. Also shown in FIG. 2 is the result where absorption D is plotted against time. The curve representing the partially neutralizing superabsorbent always lies below the curve representing the conventional superabsorbent.
    [61] Absorption (g / g) timeIM 7110IM 7100 15 seconds2.48.0 30 seconds18.322.9 45 seconds25.932.9 1 minute28.436.9 2 minutes29.639.3 5 minutes30.940.3 30 minutes32.040.5 60 minutes32.840.1
    [62] Any product worn in direct contact with the skin can cause undesirable side effects. These side effects can be a result of occlusion, the presence of moisture and the nature of mechanical factors, microorganisms and enzymes, and can cause dermatitis, primary or secondary skin infections and undesirable odors. The increase in pH usually occurs when the absorbent product is worn on the skin. However, some undesirable side effects may occur as a result of, or in connection with, an increase in pH. One example of such undesirable side effects is irritant contact dermatitis associated with the surface pH of the skin.
    [63] Another example of undesirable side effects is that bacteria such as Proteus can metabolize substances in urine and other body fluids, generate odorous substances such as ammonia and amines, and also increase pH. The equilibrium of many malodorous substances is changed at high pH values, producing more volatile components and causing more malodors than at lower pH values.
    [64] The growth of microorganisms is also favored by the environment as found in the absorbent article, that is, the environment in which moisture, nutrients and heat are available, among others. Many bacteria carry the risk of infection. In addition, a large number of bacteria increase the risk of unpleasant odors caused by various substances formed by the biological or chemical decomposition of body fluid components such as urine and menstrual fluid components. The activity of microorganisms is very pH dependent and decreases with decreasing pH value.
    [65] The pH is lowered when the absorbent structure comprises a partially neutralizing superabsorbent material according to the invention. Therefore, the above undesirable side effects are reduced in the absorbent structure according to the invention.
    [66] Partially neutralized superabsorbent materials used in absorbent articles are described in Swedish patent application SE 9702298-2. Reduction of the pH value is achieved by the absorbent structure of the article comprising the pH regulator in the form of a partially neutralized superabsorbent material. Significant inhibitory effects on undesirable microbial strains are obtained and it has been observed that the occurrence of undesirable side effects that may result from wearing the article decreases when the pH of the absorbent article is in the range of 3.5-4.9 after wet.
    [67] An example of the relationship between neutralization and pH of superabsorbent material can be seen from the table below. Data included in the table was taken from SE 9702298-2.
    [68] Neutralization%pH 1825303545604.04.34.54.75.05.5
    [69] The degree of neutralization of the superabsorbent material of the present invention is between 20 and 50%.
    [70] Another advantage obtained by the present invention is that the occurrence of malodors and skin diseases that can result from wearing absorbent articles in direct contact with the skin can be avoided. The antiproliferative effect is based on the observation that the activity of many microorganisms is highly dependent on pH and decreases with decreasing pH, so a decrease in pH value will reduce the activity of most microorganisms. Enzymes such as lipases and proteases are significantly pH dependent and have decreasing activity with decreasing pH, so a decrease in pH value reduces enzymatic activity and a negative effect on the skin of the activity.
    [71] The following examples illustrate the effects achieved in an absorbent article having an absorbent comprising a partially neutralizing superabsorbent material, as compared to conventional materials of the corresponding kind.
    [72] Absorbents comprising the absorbent material and the absorbed liquid are inherently non-uniform in terms of pH. The system may comprise a liquid comprising superabsorbent material, fibers and some form of ions. In order to obtain a reproducible pH value, the measurement must be taken at various places in the sample body and the average value was calculated based on it.
    [73] Description of Examples 2, 3, 4 and 5
    [74] Test solution
    [75] Microbial growth medium was added to sterile synthetic urine. Synthetic urine includes monovalent and divalent cations and anions and urine and is described in Geigy, Scientific Tables, Vol. 2, 8th Ed., 1981, p. Prepared according to the information described in 53.
    [76] The microbial growth medium was based on information related to Hook and FSA medium for enteric bacteria. The mixture had a pH of 6.6.
    [77] Test method
    [78] Method 1, Preparation of Absorption Test Body
    [79] Absorbents were prepared through previous slightly modified samples in accordance with SCAN C 33:80. Weighing a preferred type of fluff pulp and superabsorbent material, a homogeneous mixture of fluff pulp and superabsorbent material, having a diameter of 5 cm in an air stream of about 85 mbar negative pressure, having a bottom with metal mesh and having a thin bottom The fabric was passed through a pipe placed on the mesh. The mixture of fluff pulp and superabsorbent material was collected on a fabric over a mesh and the absorbent was formed. The absorber was then weighed and compressed to a bulk density of 6-12 cm 3 / g. Thereafter, a number of absorbers represented by Sample 1 and Sample 2 of different compositions were prepared as follows. Sample 1 included a superabsorbent IM 7100, ie a conventional superabsorbent, and sample 2 included a partially neutralizing superabsorbent IM 7110.
    [80] The absorbent contained chemical cellulose pulp called Korsnas EA.
    [81] The absorbers had a total individual weight of 0.98 g.
    [82] The superabsorbent material weighed 0.39 grams.
    [83] The chemical cellulose pulp weighed 0.59 grams.
    [84] Method 2, pH measurement of absorber
    [85] Absorbers having a diameter of about 50 mm were prepared according to Method 1. 14 ml of test solution was added to the absorber, sample 1, 11 ml of test solution was added to another absorber, sample 2, and then the absorber was swelled for 30 minutes (the amount of liquid absorbed by the superabsorbent changes each other. Different volumes of liquid were added). Then surface electrode, Flatbottnad Metrohm pH meter, Beckman 12 or 72 was used to measure the pH of each absorber. Similar measurements were made on at least two different absorbers. Ten pHs were measured for each absorber and then averaged.
    [86] Method 3, measurement of bacterial inhibition in the absorber
    [87] Bacterial suspensions of Escherichia coli (Ec), Proteus mirabilis (Pm) and Enterococcus faecalis (Ef) were incubated overnight in nutrient solution (nutrient oxide CMI) at a temperature of 30 ° C. Graft culture was diluted and bacterial content was calculated. The cultures were mixed in different proportions, so the final culture mixture contained about 10 4 microorganisms per ml of synthetic urine. 10 ml of synthetic urine was poured into a 70.5 x 52 mm sterile putum jar with a volume of 100 ml, the jar containing the absorbent was turned upside down and the liquid was absorbed for 5 minutes. Incubations were made for hours, 6 hours and 12 hours, after which the number of bacteria in the absorber was determined. TGE agar was used as a nutrient to determine the total number of bacteria, Drigalski agar was used to measure E. coli in particular, and Slanetz Bartley agar was used to measure Enterococcus faecalis in particular. The results are shown in the table below:
    [88] Test results
    [89] Example 2
    [90] It can be seen from Table 2 that the absorber according to Sample 2 comprises a partially neutralizing superabsorbent IM 7110 which effectively inhibits the growth of Escherichia coli.
    [91] Escherichia coli0 hours6 hours12 hours Sample 13.57.38.9 Sample 23.53.73.3
    [92] Example 3
    [93] It can be seen from Table 3 that the proliferation of Proteus mirabilis is effectively inhibited in Sample 2, and Sample 2 consists of an absorbent comprising a partially neutralizing superabsorbent IM 7110.
    [94] Proteus mirabilis0 hours6 hours12 hours Sample 13.26.39 Sample 23.2<2<2
    [95] Example 4
    [96] It can be seen from Table 4 that the proliferation of Enterococcus faecalis is effectively inhibited in Sample 2, which consists of an absorber comprising partially neutralizing superabsorbent IM 7110.
    [97] Enterococcusfaecalis0 hours6 hours12 hours Sample 13.46.37.6 Sample 23.43.33.4
    [98] The measurement was carried out according to the method 3 in Examples 2-4.
    [99] It can be seen from Examples 2-4 that the inhibition of microbial proliferation was excellent when using partially neutralizing superabsorbents in the absorber.
    [100] Example 5
    [101] As can be seen from Table 5, the pH of the absorber composed of Sample 1 including the conventional superabsorbent has a high pH of 6 or more and 8.7 or less after 12 hours. A low pH of 4.6 is obtained in Sample 2 with the partially neutralizing superabsorbent, which is a suitable value to inhibit microbial growth.
    [102] pH0 hours6 hours12 hours Sample 16.16.28.7 Sample 24.64.64.6
    [103] The measurement was performed in accordance with Method 2.
    [104] Therefore, the present invention relates to absorbent structures of absorbent articles, such as articles such as diapers, panty diapers, urinary incontinence guards, sanitary napkins, panty liners and the like, wherein the structures are dried in areas or areas where superabsorbent material is dispersed. And at least 40 weight percent of superabsorbent material, based on the total weight of the superabsorbent material, having a degree of neutralization between 20 and 50%. Preferred neutralizations are between 25 and 35%. At a degree of neutralization between 20 and 50%, or between 25 and 35%, a pH is obtained which is advantageous, for example, to inhibit the growth of microorganisms and to eliminate undesirable side effects. This also allows the article to be worn for long periods of time as a result of lower pH and as a result of higher absorption of the inventive article. This long term use provided by the absorbent structure is advantageously associated with a slow rate of absorption and low total absorption of each superabsorbent particle, which reduces the risk of gel blocking and lump formation.
    [105] The amount of superabsorbent material present can be between 40 and 50 weight percent based on the total weight of the absorbent structure in the dry state. However, the ratio of superabsorbent may be higher, for example up to 90 weight percent. The absorbent structure may also include only superabsorbent material.
    [106] The ratio of superabsorbent material in the absorbent structure is mainly based on the total weight of the absorbent structure in the dry state in the region or regions in which the superabsorbent material is dispersed.
    [107] Partially neutralized superabsorbent materials are mainly used in absorbent structures according to the present invention.
    [108] However, the absorbent structure can also include conventional superabsorbent materials. In this case, the partially neutralized superabsorbent is positioned inside the wet region, while the conventional superabsorbent is positioned outside the wet region. One advantage of localization of the superabsorbent material is that it has the lowest degree of neutralization in the wet region of the article, ie the crotch region of the article, and localizing the conventional superabsorbent material at the distal end of the article may result in distal end of the article from the wet region. Liquid dispersion in the furnace is enhanced in this structure. This can improve the utilization of the total absorbent capacity of the absorbent structure and can also reduce the risk of gel blocking in wet areas.
    [109] Alternatively, the superabsorbent dispersion may be such that the partially neutralizing superabsorbent is located in a first zone close to the wearer, and the conventional superabsorbent is gathered in a second zone located below the first zone where it appears to be on the wearer's side of the absorbent article. have. This provides the same advantages as described above, because the liquid spreads from the zone where the liquid is first to be neutralized and contains the conventional superabsorbent material. The use of absorbent articles can be increased and the risk of gel blocking in the sheet or layer closest to the wearer can be reduced.
    [110] A further embodiment is that the partially neutralizing superabsorbent is located in a layer or sheet at the bottom or bottom of the structure, whereby it can act as a liquid dispersion sheet or layer.
    [111] In the above embodiment the concentration of the partially neutralized superabsorbent material may be at least 40 weight percent in the region where the partially neutralized superabsorbent material is located.
    [112] However, in preferred embodiments partially neutralizing superabsorbent materials are included only for the purpose of achieving a desirable pH reduction in order to reduce undesirable side effects.
    [113] Because partially neutralizing superabsorbents can be used at high concentrations, superabsorbents can be advantageously used in thin absorbent structures. Thin absorbent structures can be obtained from dry compressed compressed thermodynamic pulp, CTMP, chemical pulp, CP, and the like. Thin products are advantageous because they can be worn loosely and comfortably.
    [114] In a preferred embodiment of the invention, the absorbent structure comprises compressed CTMP pulp, CP pulp, and the like in dry form, and also includes a partially neutralizing superabsorbent. The absorbent structure is usually formed of a mat which is then very compressed. This gives a very thin absorbent structure. In this case, the partially neutralizing superabsorbents are mixed at the center. For example, the superabsorbent may be uniformly mixed with cellulose fibers in a so-called mixed layer, or may be located between two cellulosic layers. As with the structure described above, the amount of neutralizing superabsorbent provided will correspond to at least 40 weight percent based on the total weight of the absorbent structure in the dry state in the region or regions in which the superabsorbent material is dispersed. The degree of neutralization is between 20 and 50%, preferably between 25 and 35%.
    [115] The use of compressed CTMP pulp, CP pulp, and the like in dry form in absorbent structures results in thin products that can be worn loosely. Undesirable side effects such as malodor and dermatitis are simultaneously avoided as described above. The above disadvantages of gel blocking and lump forming forms are also avoided, and a high absorption capacity is achieved.
    [116] A feature of the compacted inventive structure is that it is thin before the central part is wet and swells when it is wet and at the same time disperses the liquid. The use of compressed paper pulp in dry form in the absorbent structure makes it possible to provide the structure with 1 to 3 mm of looseness. A thin center of 0.5 mm can also be obtained and then used for example in panty liners. Baby diapers need to have high absorption capacity, moderate thickness of 8 mm or less. Preferred thicknesses are 1 to 8 mm and 1 to 3 mm, respectively.
    [117] The comfort of the wearer is maintained despite the high concentration of superabsorbent, since the partially neutralizing superabsorbent has a slow absorption rate and low absorption capacity.
    [118] The invention also relates to absorbent articles, such as articles such as diapers, panty diapers, incontinence guards, sanitary napkins, panty liners, etc., comprising an upper liquid permeable sheet, a bottom liquid impermeable barrier sheet, and an absorbent structure enclosed therebetween. The absorbent structure is of the above kind.
    [119] The absorbent article also typically includes a getter / transfer layer between the upper liquid permeable topsheet and the absorbent structure. The obtaining / conveying layer has an open and breathable structure and serves to quickly receive a fixed amount of liquid and to quickly transfer this liquid to the absorbent structure. The gain / transfer layer may comprise a nonwoven material, which may be prepared by through air bonding and carding or by needling of synthetic fibers such as polyester, polypropylene or mixtures thereof. The above obtained layers / transport layers comprising essentially hydrophobic synthetic fibers are not included in the context of the absorbent structure of the present patent application. On the other hand, the absorbent article according to the present invention may include the obtained layer / transport layer. On the other hand, the absorbent article according to the present invention may include the obtained layer / transport layer.
    [120] According to one preferred embodiment, the article is an incontinence product or a feminine product.
    [121] As used herein, the term "comprising" means containing, not limiting.
    权利要求:
    Claims (7)
    [1" claim-type="Currently amended] In absorbent structures of absorbent articles, such as articles such as diapers, panty diapers, incontinence guards, sanitary napkins, panty liners, and the like, the structure is based on the total weight of the absorbent structure in the dry state in the region or areas where the superabsorbent material is dispersed. At least 40 weight percent of superabsorbent material, wherein the superabsorbent material has a degree of neutralization between 20 and 50%.
    [2" claim-type="Currently amended] The absorbent structure of claim 1 wherein the degree of neutralization is between 25 and 35%.
    [3" claim-type="Currently amended] The absorbent structure of claim 1, wherein the absorbent structure comprises pulp, such as dry forming, compressed CTMP pulp, CP pulp, etc. in addition to the superabsorbent material.
    [4" claim-type="Currently amended] The absorbent structure of claim 3, wherein the absorbent structure has a thickness of 1 mm to 8 mm when dried.
    [5" claim-type="Currently amended] The absorbent structure of claim 3, wherein the structure has a thickness of 1 mm to 3 mm when the structure is dried.
    [6" claim-type="Currently amended] The absorbent structure according to any one of claims 1 to 5, wherein the absorbent article is intended for an incontinence guard or a female product.
    [7" claim-type="Currently amended] An absorbent article, such as a diaper, a panty diaper, an incontinence guard, a sanitary napkin, a panty liner, or the like, comprising an upper liquid permeable sheet, a bottom liquid impermeable barrier sheet, and an absorbent structure enclosed therebetween, wherein the absorbent structure comprises: Absorbent article, characterized in that the kind defined in at least one of the preceding.
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    同族专利:
    公开号 | 公开日
    BR9916289B1|2011-05-31|
    MXPA01005875A|2002-03-27|
    AU3091300A|2000-07-03|
    SE9804361D0|1998-12-16|
    CA2352866A1|2000-06-22|
    SE9804361L|2000-06-17|
    AU763783B2|2003-07-31|
    JP2002532154A|2002-10-02|
    WO2000035505A1|2000-06-22|
    PL197154B1|2008-03-31|
    RU2234947C2|2004-08-27|
    PL348872A1|2002-06-17|
    US6974890B1|2005-12-13|
    EP1140230A1|2001-10-10|
    BR9916289A|2001-10-16|
    MX240950B|2006-10-10|
    TW414706B|2000-12-11|
    SE513374C2|2000-09-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1998-12-16|Priority to SE9804361A
    1998-12-16|Priority to SE9804361-5
    1999-12-15|Application filed by 에스체아 히기에너 프로덕츠 악티에볼라그
    2001-11-14|Publication of KR20010101227A
    优先权:
    申请号 | 申请日 | 专利标题
    SE9804361A|SE513374C2|1998-12-16|1998-12-16|Absorbent structure in an absorbent article, comprising a partially neutralized superabsorbent material and an absorbent article comprising the absorbent structure|
    SE9804361-5|1998-12-16|
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