MXPA99005689A - Improved female fastening portion for an absorbent article - Google Patents

Abstract

A female fastening portion (30) for a refastenable mechanical fastening device (54) is described, said female fastening portion (30) being capable of engaging a complementary male fastening portion (84), said female fastening portion (30) comprising a textile material (32), said textile material (32) being disposed adjacent a substrate (34), whereby a layer of adhesive (36) is interposed between said textile material (32) and said substrate (34), characterised in that said textile material (32) and said layer of adhesive (36) combined have a basis weight not greater than 45 grammes per square metre. The textile material (32) comprises a basis weight not greater than 40 grammes per square metre, preferably not greater than 34 grammes per square metre, more preferably not greater than 28 grammes for square metre. In a further aspect of the invention, the female fastening portion (30) is applied to a disposable absorbent article (50).

Description

IMPROVED FEMALE HOLDING PORTION FOR AN ABSORBENT ARTICLE FIELD OF THE INVENTION The present invention relates to an improved female fastener portion for a restrainable mechanical fastener device. This application is proposed for use in disposable absorbent articles.

BACKGROUND OF THE INVENTION Disposable absorbent articles, in particular, disposable diapers are well-known articles of manufacture that are designed to be used primarily by infants and incontinence victims. Such diapers are worn around the lower torso of the wearer and are intended to absorb and contain urine and other bodily discharges, thereby preventing fouling, wetting or similar contamination of items (e.g., clothing, bedding) , other people, etc.) that may come into contact with such diaper in use. When a disposable diaper is used, the wearer of the diaper adjusts the diaper in which he wears it and holds it around the waist of the wearer with the aid of a fastening device to effect a lateral approach. Adjusting the diaper around the wearer normally requires that the back and front waist portions of the diaper overlap one another. Due to the proper and sustained fit around the waist and legs of the wearer, it is vital for optimal performance in terms of minimizing the runoff of body exudates out of the diaper, a diaper fastener device must be able to provide a lateral approach effective in which the front and back waist portions are maintained in an overlap configuration. While wearing the diaper, the overlapping portions are subject to forces that tend to cause the portions to shift position relative to each other. Unless such a displacement is limited, the diaper containment and adjustment characteristics deteriorate while the diaper is being worn. Therefore the fastener device must be designed to fit securely so it does not separate due to the shearing forces and shear stresses by the fastener device during use. The use of fastener devices to secure the back and front portions in a disposable absorbent article is widely known. Examples of tape adhesive tape fastening devices are disclosed in US RE 26,151, US 3,848,594, US 4,985,025, EP 0 286 030 and many other publications. While the pull tab fastener devices provide a secure means for securing a disposable absorbent article around the wearer's waist during use, these are not completely satisfactory. Such fastening devices are always useful only in the initial fixation of the disposable absorbent article and the resuscitation is not a concomitant benefit. In addition, fasteners reveal unsatisfactory resistance to contamination of oils and powders. Therefore, the state of the art discloses many alternatives as potential solutions to such deficiencies. For example, mechanical fasteners have been contemplated and are disclosed in many publications such as US 3,110,3112, US 4,259,957 and EP 0 235 014. Such a mechanical fastener device exhibits reduced sensitivity to contamination and has the advantage of resuscitation.

As a consequence, these mechanical fastener devices have gained popularity advantage over the past few years. A mechanical fastening device generally constitutes two elements: a female fastening portion comprising a crimping material and a male fastening portion comprising a fastening material of hooks. After stabilizing the main benefits of the mechanical fastener devices over the adhesive tape reel fastening systems, it was discovered that a problem arises in relationship with the female holding portion. Typically the female fastener portion comprises a woven fabric. It was recognized that the adhesive fixation of the woven fabric to a base substrate affected the functional performance of the locks. Generally the adhesive tended to spill through the woven fabric structure resulting in the bonding of the loops to the woven fabric and in the production of a representative portion of the loops completely unsuitable for coupling with the fastener material of the portion hooks. male fastener. In order to address a problem like thisUS 5,554,239 discloses a fastener component for a disposable absorbent article that includes a substrate and a curl material formed of a flexible fabric. The curl material is arranged in a knitted pattern with two-bar warp and has a basis weight from 34 to 102 grams per square meter. An adhesive is used to bond the curl material to the substrate. The adhesive comprises a first zone with a base weight greater than zero (typically 40 grams per square meter) and a second zone with a second base weight (typically 190 grams per square meter) at least about one and a half times more large than the first base weight. The use of a lower base weight in the first zone prevents spillage from the first zone to the curl material. In contrast, the use of a larger weight base in the peripheral portions of the curl material in the second zone results in the spill and consequently, in the death of the curl material. Therefore, the functional performance of the curl material for the coupling is greatly deteriorated and in some cases destroyed. Furthermore, the invention depends on a high amount of adhesive, which is useful and does not guarantee a satisfactory result with respect to the performance of the curl. European Patent Application No. 9606398, filed May 23, 1996, discloses a method for producing a mounting for use as the female hold portion of a disposable absorbent article. The invention is devoted to the problem of eliminating the separation phenomenon. The assembly comprises a first layer and a second layer, fixed to each of the others by means of an adhesive or by thermal bonding, and curl elements, which are fixed to the second layer. The first layer is dense and the second is formed by interweaving the threads in a warp or weft pattern. As a result of prior attempts at prior art, it has been recognized by those skilled in the art that it would be desirable to provide a female fastener portion with an extremely high number of functionally functioning curls that are not affected by the spill phenomenon. Furthermore, the most advantageous thing would be to reduce the base weight of both the woven fabric and the adhesive from an aesthetic and functional point of view. The reduction of the base weight results in the best use of the material, allows the design on the underlying substrate to the woven fabric to be more clearly enhanced and leads to an improvement in the tactile qualities. It is also known that using current technologies, it is difficult to reduce the base weight of the female fastener portion without causing a degradation in the performance of the mechanical fastener device, for example, deteriorating the values of the shear stress and shear force. It has now been discovered that the benefits of the present invention vary from a female fastener portion exhibiting superior functional performance when coupled with the fastener material of a male fastener portion.; for a low base weight assembly comprising the textile material of the male fastener portion and the adhesive, used to fix the textile material to the substrate extending below, which is more attractive from one aspect of the use of the materials; to a female fastener portion with a very satisfactory release force resistance value when coupled with the hook fastening material of the male fastener portion; to a gentle and softer male fastening portion; and a mechanical fastening device that leads to a high level of user confidence and satisfaction.

BRIEF DESCRIPTION OF THE INVENTION The female fastener portion of the present invention represents a constituent member of a mechanical fastener device, the other constituent member being a male fastener portion, which is designed to mechanically couple with the female fastener portion. In particular the male fastener portions of the hook type engage with female fastener portions of the curl type. In one aspect, the present invention relates to a female fastener portion for a restrainable mechanical fastener device wherein the female fastener portion is capable of coupling a complementary male fastener portion. The female fastener portion comprises a textile material, which is disposed adjacent a substrate. A layer of adhesive is interposed between the textile material and the substrate. The combined textile and adhesive layer has a basis weight of no more than 45 grams per square meter. More particularly, the textile material of the female fastener portion comprises a basis weight of no more than 40 grams per square meter, preferably no greater than 34 grams per square meter, more preferably no greater than 28 grams per square meter. In a preferred embodiment of the present invention, the textile has a three-bar warp pattern comprising curls, ducts and ridges. In another preferred embodiment of the present invention, the textile material has a two-bar warp pattern comprising only ducts and ridges. In another aspect of the present invention, the female fastener portion is applied to a disposable absorbent article, such as a diaper. The substrate, to which the textile material is affixed, can comprise either a layer adjacent to the external surface of the body portion with a layer of adhesive interposed between or just simply the outer surface of the body portion.

BRIEF DESCRIPTION OF THE DRAWINGS It is believed that the invention will be better understood from the foregoing description in conjunction with the accompanying drawings in which: Figure 1 is an enlarged sectional view of the female fastener portion according to the teachings of the present invention; Figure 2 shows a flat-view photograph of a female fastener portion of knitted fabric with three-bar warp; Figure 3 illustrates the construction of the female knitting fastener portion with three-bar warp as shown in Figure 2; and Figure 4 details a partially cut away perspective view of a diaper that modalizes the resusable mechanical fastener device of the present invention.

DETAILED DESCRIPTION OF THE INVENTION As used herein, the term "textile material" includes material of knitted fabric, woven material and canvas. As used herein, the term "disposable absorbent article" refers to articles that absorb and contain body exudates; and more specifically refers to articles that are placed against or in proximity to the body of the wearer to absorb and contain the various exudates discharged from the body and which are intended to be discharged after a single use (for example, no intended to be washed or otherwise resold or reused) and, preferably, recycled, composted or otherwise disposed in an environmentally compatible manner. As used herein, the term "diaper" refers to a garment generally worn by infants or incontinence victims that is placed between the legs and fastened around the waist of the wearer. However, it should be understood that the present intention also applies to other disposable absorbent articles such as diapers, underpants, incontinence briefs, feminine sanitary garments or panties, aprons, hospital gowns, capes, bandages and the like. As used herein, the term "shear stress" refers to the distributed forces acting tangentially to the contact surface of the fastener member members (or along the x and y plane). During the dress of a disposable absorbent article, cutting efforts tend to cause the fastener member to move relative to each other. The shear stress will be distinguished from the "detachment force" acting on the fastening portion of the fastener device to separate and detach from each other in the Z direction. A disposable absorbent article is typically subject to peel force in at least three ways. The detachment forces are generally due to the movements of what you saw during use while tending to cause the first and second fastener portions of the fastener device to pull each other from the other, by the user trying to detach the fastener device during the use and by the user to check the disposable absorbent article for soiling or to remove the disposable absorbent article from the user. The clamping device is preferably designed to have a resistance to detachment garments (resistance to detachment force) with respect to only the movement and methods generated by the wearer. Therefore, the resistance to the detachment force should only be large enough to prevent the failure of the fastening device during the first two methods, but low enough to allow the user to check the disposable absorbent article for soiling or to remove the article. Disposable absorbent from the one who wears it without undue difficulty or tearing apart other members of the disposable absorbent article. It is desirable to design a fastener capable of resisting shear stresses and shear stresses generated by the wearer, but having a sufficiently low peel strength to allow the user to easily remove the disposable absorbent article or check for soiling. absorbent article discard. The resourable mechanical fastening devices of the present invention have been found to be particularly useful and beneficial when applied to disposable absorbent articles. The restrainable mechanical fastener device of the present invention comprises a female fastener portion, which is capable of coupling with a complementary male fastener portion. In one aspect of the present invention, a female fastener portion for a restrainable mechanical fastening device is described. Figures 1 and 2 show a female fastener portion 30 comprising a textile material 32, which is disposed adjacent a substrate 34. An adhesive layer 36 is interposed between the textile material 32 and the substrate 34. The combined base weight of the textile material 32 and adhesive layer 36 is not greater than 45 grams per square meter. More specifically, the basis weight of the textile material 32 is not greater than 40 grams per square meter, preferably no greater than 34 grams per square meter, and more preferably no greater than 28 grams per square meter. The adhesive may comprise any convenient adhesive such as a thermal melt, or the like. By way of illustration, suitable adhesives are available from Findley Adhesives, Inc. of Wauwatosa, Wis., USA under the trade designations of TEF 195 and TEF 688. Both adhesives have a basis weight in the range of 3 to 30 grams per meter square.

The female holding portion 30 comprises a curl-type fastening material consisting of a plurality of crimps 38. The female fastening portion 30 is a flexible textile material 32 that can comprise any yarn material. Yarn materials include, but are not limited to polypropylene, polyethylene terephthalate, polyamide or similar natural or synthetic fibers. In a preferred embodiment of the present invention, as seen from FIGS. 2 and 3, the female fastener portions 30 are formed of a textile material 32 having a three-bar warp knitted construction comprising crimps 38, ducts. 40 (threads in the machine direction) and flanges 42 (threads in the cross direction of the machine.) - The crimps 38, ducts 40 and flanges 42 are preferably made of polyamide Ducts 40 vary from 5 to 25. conduits 40 per centimeter, flanges 42 vary from 3 to 12 flanges 42 per centimeter and crimps 38 vary from 10 to 200 crimps per square centimeter In a most preferred embodiment of the present invention, textile material 32 comprises 15 conduits 40 centimeter, 5 rims 42 per centimeter and 40 ringlets 38 per square centimeter The curls 38 of the textile material 32 can be formed with a curl height ranging from about 0.2 to 20 millimeters, a curl din that varies from 8 to 78 and a basis weight, which is less than 40 grams per square meter, preferably less than 34 grams per square meter and more preferably less than 28 grams per square meter. The curls 38 may be stabilized through the fluff, thermal hardening or the like. In another embodiment of the present invention, the female fastener portion 30 comprises a knitted two-bar warp construction comprising conduits 40 ranging from 5 to 25 conduits 40 per square centimeter, preferably 15 per square centimeter, and flanges 42 which vary from 3 to 12 beads 42 per centimeter, preferably 5 per centimeter. In particular, the yarns of the curls 38, conduits 40 and ridges 42 are composed of yarn having about 1 to 30 individual filaments, preferably with 30 filaments of yarn for the curls 38, 1 filament for the conduits 40 and 1 filament for the yarns. ridges 42. Threads typically have a denier in the range of 8 to 78 denier. In a preferred embodiment of the present invention, the denier value for the loops 38 is 44 denier, and for the conduits 40 and flanges 42 it is 22 denier, respectively. The crimps 38 are preferably constructed in such a way that the shear stresses and the shearing force show an equivalent distribution in both directions C and D, as is evident from Figure 4 (e.g., extended direction of the elastic members 66). The preferred pattern involves the rizps 38 which are oriented either all in the same direction or half of the curls 38 that are oriented in one direction and the other half of the curls that are oriented in the other direction in alternate fashion. In another aspect of the present invention, the female fastener portion 30 is applied to a disposable absorbent article. Figure 4 shows the preferred embodiment of the present invention for a disposable absorbent article, called a diaper 50, which modalizes the present invention. Examples of the types of diapers 50 to which the present invention is readily adapted are shown in US 26,151; in US 3,860,003 and in US 4,834,735. It will be apparent from the following description that the resusceptible mechanical fastener device 54 illustrated and described herein can be applied to the body portion 52 of such diaper 50. On the other hand, it will be understood that the invention is not limited to any configuration diaper construction. Figure 4 is a partially cutaway perspective view of a diaper 50 that modalizes the present invention before it is placed in the one you saw it. As it is visible from figure 4, a preferred diaper 50 comprises a body portion 52 and a resusceptible mechanical fastening device 54. A preferred body portion 52 comprises a liquid-permeable top sheet 56, an absorbent core 58, a liquid-impermeable back sheet 60, and a fold contractable leg 62, each leg fold 62 preferably comprises a side flap 64 and one or more elastic members 66. For purposes of simplicity, only one elastic member is shown on the side flap 64. While the top sheet 56, the core absorbent 58, backsheet 60, side flaps 64 and elastic members 66 can be assembled in a variety of well-known configurations, a preferred disposable diaper configuration is shown and described generally in US 3,860,003. In this preferred diaper embodiment the backsheet 60 is attached to the top sheet 56; the absorbent core 58 is positioned between the upper sheet 56 and the back sheet 60; the flaps 64 extend outwardly from and along each side edge of the absorbent core 58, and the elastic member 66 is operatively associated with each side flap 64. Figure 4 shows the body portion 52 in which the top sheet 56 and the backsheet 60 are coextensive and have length and width dimensions generally greater than those of the absorbent core 58. The topsheet 56 is superimposed on the backsheet 60 whereby the periphery 68 of the body portion 52 is formed. periphery 68 defines the outer perimeter or in other words the outer extension of the body portion 52. The periphery comprises the longitudinal side edges 70 and the side end edges 72. In the longitudinal direction, the diaper 50 has a first end region 78 and a second end region 80. The body portion 52 has an inner surface 74 and an outer surface 76. In general, the surface 76 of the diaper 50 extends from one edge 72 to the other end edge 72 of the diaper 50 and from a side edge. longitudinal 70 to the other longitudinal side edge 70 of the diaper 50. When a backsheet 60 is used, it typically forms the outer surface 76 of the body portion 52. The inner surface 74 is that surface of the diaper 50 opposite the outer surface 76 and in the embodiment shown it is typically formed by the top sheet 56. In general, the inner surface 74 of the diaper 50 is that surface coextensive with the surface external 76 and which is for the larger part in contact with the one who saw it when the diaper 60 is dressed. The diaper 50 has a first end region 78 and a second end region 80 extending from the lateral end edges 72 of the periphery of the diaper 68 to the diaper midline 50. Both of the first end region 78 and the second end region 80 extend at a distance of about one-half the length of the diaper 50 such that the end regions 78, 80 comprise each half of the diaper 50. Both the first end region 78 and the second end region 82 have panels 82. The panels 82 are those portions of the first end region 78 and the second end region 80 that overlap when the diaper 50 fits around the waist of the wearer. The absorbent core 58 of the body portion 52 may be any absorbent means that is generally compressible, conformable, non-irritating to the wearer's skin, and capable of absorbing and retaining liquids such as urine and other certain bodily discharges. The absorbent core 58 can be manufactured in a variety of sizes and shapes, for example rectangular, hourglass, "T", asymmetric, etc.) and a wide variety of liquid absorbent materials commonly used in disposable diapers and other absorbent articles such as ground wood pulp which is generally referred to as air felt. Examples of other suitable absorbent materials include creped cellulose wadding, meltblown polymers including coform, crosslinked cellulose fibers, tissue including tissue blankets, absorbent foams, super absorbent polymers, absorbent gelling materials, or any equivalent materials or combination of materials . The configuration and construction of the absorbent core 58 may also be varied (eg, the absorbent core 58 may have calibrating zones which variants, hydrophobic gradients, super absorbent gradients, or lower average base weight acquisition areas and lower average density; or may comprise one or more layers or structures). However, the total absorbent capacity of the absorbent core 58 must be compatible with the design direction and the intended use of the adjustment diaper. Additionally, the size and absorbent capacity of the absorbent core 58 can be varied to accommodate the ranges of those who wear them from infants to adults. The backsheet 60 is impervious to liquids (eg, urine) and is preferably manufactured from a thin plastic film, preferably u > - thermoplastic film, although other flexible materials impermeable to liquid can be used. As used herein, the term "flexible" refers to materials that are docile and that will easily conform to the general shape and contours of the human body. The backsheet 60 prevents the exudates absorbed and contained in the absorbent core 58 from the soiled articles that are in contact with the diaper 50 such as undergarments and bedding. The backsheet 60 may then comprise polymeric films such as polyethylene or polypropylene thermoplastic films, or composite materials such as film-coated nonwoven materials. For ecological, aesthetic and economic reasons, the backsheet 60 has an average nominal caliper, for example calculated caliper, of less than about 0.051 millimeters, more preferably a caliper calculated from 0.020 millimeters to 0.036 millimeters.

Preferably, the backsheet 60 is a flexible polyethylene film. As used herein, the term "polyethylene" film is required of films that are essentially made of polyethylene, however, it is understood that the polyethylene film will contain a variety of additives to provide characteristics such as opacity, strength requirements, color, or any other desired characteristic that can be achieved by adding smaller quantities of substances other than polyethylene to the films. The total amount of additives should be less than 45 percent, preferably less than 15 percent, by weight of film materials. Particularly, for the opacity of the film, titanium dioxide is commonly used in a range of 2 to 6 percent, preferably 3.5 to 4.8 percent, by weight of the film. Exemplary films are manufactured by Tredegar Industries, Inc. of Terre Haute, Ind., USA or BP-Chemical PlasTec Rotbuchenstrasse 1, D-8000 München, Germany. The backsheet 60 is normally textured to provide a greater fabric-like appearance. In addition, the backsheet 60 can also allow the vapors to escape from the absorbent core 58 while still preventing the exudates from passing through the backsheet 60 by, for example, being supplied with micro-openings. The size of the backsheet 60 is dictated by the size of the absorbent core 58 and the exact design of the selected diaper. The upper sheet 56 of the body portion 52 of the present invention is docile, soft to the touch and non-irritating to the skin of the wearer. In addition, the topsheet 56 is permeable to liquid allowing liquids (eg, urine) to easily penetrate through its thickness. A convenient top sheet 56 can be manufactured from a wide range of materials, such as porous foams, cross-linked foams, apertured films; or woven or non-woven fabrics of natural fibers (for example, cotton or wool fibers) or from a combination of natural or synthetic fibers. Preferably, it is made of a material that isolates the wearer's skin from the liquids retained in the absorbent core 58. There are a number of fabrication techniques that can be used to manufacture the topsheet 56. For example, the topsheet 56 It can be a non-woven fiber cloth. When the topsheet 56 comprises a non-woven fabric, the fabric can be spun, carded, wet-laid, blow-molded, hydroentangled, hydroformed, combinations of the above or the like. An exemplary top layer 56 is carded and heat bonded by means well known to those skilled in the art of the fabric and comprises polypropylene raw material fibers of about 2.2 and has a basis weight of about 15 to about 30 grams per square meter. As used herein, the term "raw material length fibers" refers to those fibers that have a length of at least 16 millimeters. A convenient top sheet 56 is manufactured by, for example, Veratec Inc., a division of International Paper Company, of Walpole, Mass., USA. A top sheet 56 particularly preferred for incontinence garments comprises a formed thermoplastic film. The female fastener portion 30 of the fastener device 54 provides a means for securing the same and the male fastener portion 84 together to provide a secure lateral approach and to maintain the first end region 78 and the second end region 80 in an overlapping configuration. The female fastener portion can be disposed anywhere on the portion 50 as long as it engages the male fastener portion 84 in order to provide lateral approach. For example, the female fastener portion 30 may be disposed on the outer surface 76 in the second end region 80, on the inner surface 74 in the first end region 78, or on any other portion of the diaper 50 which is arranged to couple the male fastener portion 84. In addition, the female fastener portion 30 may be a separate discrete element fixed to an element of the diaper 50 such that the upper sheet 56 or the back sheet 60. While the female fastener region 30 can assume sizes and shapes that vary and can be provided in smaller, more economical and ecological sizes that depend on the use for which the absorbent article is designed, preferably it comprises one or more (at least one) pieces of material that may be larger in area than the hook fastening material 88 and which is secured to the body portion 52 to allow a maximum fit to the waist of the wearer. As illustrated in Figure 4, the diaper 50 has a female fastener portion 30 in rectangular shape secured to the substrate 34, the substrate 34 being either a film adjacent the outer surface 76 of the body portion 52 or alternatively, the substrate. 34 which is simply the outer surface 76 of the body portion 52. For the first option comprising the film, a layer of adhesive 36 is interposed between the film and the outer surface 76 of the body portion 52. The restractable mechanical fastening device 54 comprises a male fastener portion 84, which comprises a hook fastening material 88. As used herein, the term "hook fastening material" is used to designate a material having coupling elements. It should be understood that the use of the term hook should not be limiting in the sense that the coupling elements can comprise any shape that is known in the art as long as they are adapted to couple a complementary female holding portion 30. As is visible from the 4, each male fastening portion 84 provides a fastening means for coupling the female fastening portion 30 in order to provide a secure lateral approach to the diaper 50. Then, the male fastening portion 84 comprises at least the hook fastening material 88. Each male fastening portion 84 also preferably comprises a means for positioning the hook fastening material 88 adjacent the female fastening portion 30 to allow a lateral approach. Therefore, the male fastener portion 84 can comprise any of the well-known configurations and safety means to allow a lateral approach to the diaper 50 such that an internal fastening member secured to the inner surface 74 and / or to the surface 76 of the body portion 52, tape tabs or belts. An exemplary embodiment of an internal fastener member is described in US 4,699,622. One embodiment of an incontinence garment using a belt suspension system is disclosed in US 4,315,508. Each male fastener portion 84 more preferably comprises a tape tab 86. Any of the well-known configurations and constructions of a tape tab 86 may be used. The tape tab 86 is provided on both longitudinal side edges 70 of the body portion. 52, more preferably in the first end region 78. A particularly preferred tape tab 86 has a tape tab fastener surface 90 and a rear tab surface 92. The tape tab fastener surface 90 is the surface of the tape tab 86 designed to couple the female fastener portion 30 of the present invention. Therefore, the tape tab fastener surface 90 of the tape tab 86 will generally correspond to the inner surface 74 of the body portion 52. The tape tab rear surface 92 is that surface opposite the fastener surface 90 of the tape tab. tape tab and generally corresponds to the outer surface 76 of the body portion 52. Then, the back surface 92 of tape tab is generally exposed during the diaper dress 50. The hook fastening material 88 is preferably attached to either the body portion 52 or the tape tab 86. As used herein, the term "attached" encompasses configurations in which the hook fastening material 88 is releasably secured to the diaper 50 whereby the hook fastening material 88 can be removed from the diaper 50 or its location during use and by the wherein the hook fastening material 88 is securely fastened to the diaper 50. Attached is also used to denote that the hook fastening material 88 may be directly attached to the diaper 50 or may be indirectly attached to the diaper 50 to securely or securely fasten it to the diaper 50. releasable to the hook fastening material 88 to an intermediate member which, in turn, is fixed or releasably secured to the diaper 50. Preferably, as shown in Figure 4, the hook fastening material 88 is directly attached to a portion connective 102 of the tape tab 86 by a second tongue fastening means 112. Additionally, the hook fastening material 88 can be placed in which Any place on the diaper 50. Where the male fastening portion 84 comprises an internal fastening means, the hook fastening material 88 is preferably positioned on the panels 82 of the first region 78 adjacent the longitudinal side edges 70. When the fastening portion male 84 comprises a tape tab 86, the hook fastening material 88 is preferably positioned on all or at least one portion of the tape tab clamping surface 90, or preferably all or at least a portion of the connective portion 102. More preferably, the material The hook fastener 88 is disposed on the connective portion 102 on the tape tab fastener surface 90. In order to measure the cutting force and detachment forces of the female fastener portion 30 and the male fastener portion 84 of the resasterable mechanical fastener device 54, reference is made to a convenient test method, which is described below in the section entitled "Description of the test procedure". The measured values for a sample selection (for example the female fastener portion 30 when coupled with the male fastener portion 84) were reported to be greater than 500 grams for the cutting efforts and to be at least 85 newtons per square meter for the release force preferably with 4 sigma < average size - 85 newtons per meter. In one embodiment of the present invention, where the substrate 34 comprises a film adjacent to the outer surface 76 of the body portion 52 as described herein above, the film is printed. For the alternative embodiment of the present invention where the substrate 34 comprises the external surface 76 of the body portion 52, the external surface 76 of the body portion 52 may be printed. The printing is made by means known to the person skilled in the art. In use, the diaper 50 is applied to the wearer by placing the first end region 78 under the back of who wears it and dragging the rest of the diaper 50 between the legs of the wearer then the second end region 80 is placed across the in front of who you saw it. The connecting portion 102 of the tape tabs 86 are positioned adjacent the female holding portion 30 positioned on the outer surface 76 of the second end region 80 then the hook fastening material 88 which is disposed on the grip surface 90 of the tab. of tape respectively will couple the textile material 32 of the female fastener portion 30 to form a lateral approach.

DESCRIPTION OF THE PROOF PROCEDURE For the purposes of the present invention, a method is described herein which describes the method for measuring the cutting forces (using a weight of 500 grams) and detachment force of the female fastener portion 30 and male fastener portion 84 for a device resuilable mechanical fastener 54 of the present invention. The test method is applicable to a female fastener portion 30 in the form of a terry raw material and a male fastener portion 84 in the form of a hook raw material.

Required apparatus Fourth condition controlled at 22 degrees Celsius ± 2 degrees Celsius, 50 percent ± 2 percent relative humidity. Scissors Pair common. Test stand Staples designed to hold 500 grams weight and mounted in such a way that the sample can hang free. Strips of paper Cut to a width of 2.54 centimeters of copy paper of 80 grams per square meter SB or equivalent. Curl material As described above. Material of hooks Specification of normal production material 85379. Cutter of inch Supplied by Thiwing Albert Instrument Company, Philadelphia, USA. Weight of 500 grams Common type with attached staple. Electronic textile analyzer Supplied by Zwick 1445, Zwick GmbH & Co., 7900 Ulm with a cell load of 100 newtons or equivalent.

Sample preparation Condition the test material at 22 degrees Celsius and 50 percent relative humidity for a minimum of two hours before the test. Prepare a hook sample strip for each loop sample strip to be tested.

Preparation of curl strip: - With an inch cutter, cut a strip (2.54 centimeters machine direction by cross direction width) of curl material. Cut strips in half. Be aware of the orientation of the material - curls up and curls down.

Preparation of the hook material: - Remove the outer layer of the sample roller to ensure that damaged or contaminated hook material is not measured. Make sure that the hooks unroll from the right side. Tape the hooks onto a strip of paper 2.45 centimeters wide and at least 100 millimeters long.

Cutting test Take the curl strip and insert into the paper clip of the test stand. Take the hook strip and staple it on the 500 gram weight paper clip. Take the hook strip with the weight and press it on the curl strip using the thumb and forefinger. - Release it carefully and let it hang for 5 seconds. Remove the weight from the hook strip. Remove the cut sample from the sample holder and perform the detachment test on the tensile analyzer.

Instrument preparation Before starting the detachment test, the tensile analyzer needs to be calibrated. The reference must be made from the manufacturer's instruction manual. The parameters must be set as follows: Calibrator length = 50 millimeters (0.2 inches) Pre-strength = 0.2 newtons Crosshead speed = 305 millimeters per minute (12 inches per minute) Measuring distance = 40 millimeters Release test Place the hook strip inside the upper (or mobile) embouchure of the tensile analyzer. Place the curl strip in the lower (or static) embouchure. Light the crosshead to start the test. - Repeat the process for both closed direction settings.

Data reporting Report each sample that faya to the cut test. Report the peak force (newton) and the average force (newton) for the detachment test. Samples that fail the cut test will be reported as zero. Calculate the total average, standard deviation (maximum and minimum) and average, standard deviation (maximum and minimum) for each orientation separately. Print the graphics of the detachment force curves.

GLOSSARY 30 Female fastener portion 32 Textile material 34 Substrate 36 Adhesive layer 38 Curls 40 Conduits 42 Flanges 50 Diaper 52 Body portion 54 Mechanical fastening device 56 Top sheet 58 Absorbent core 60 Back sheet 62 Leg fold 64 Side flaps 66 Elastic members 68 Periphery of body portion 70 Lateral side edges 72 Lateral end edges 74 Internal surface of body portion 76 External surface of the body portion 78 First end region 80 Second end region 82 Panels 84 Male fastener portion 86 Ribbon tab 88 Hook fastener material 90 Tape tab fastener surface 92 Tape tab top surface 102 Connective portion 112 Second tongue fastening means C Direction for the equivalent distribution of forces D Direction for the equivalent distribution of forces

Claims (9)

1. Female fastener portion (30) for a restrainable mechanical fastener device (54), said female fastener portion (30) is capable of coupling a complementary male fastener portion (84), said fastener female portion (30) comprises a textile material (32) , said textile material (32) is arranged adjacent to a substrate (34), wherein a layer of adhesive (36) is interposed between said textile material (32) and said substrate (34), characterized in that: said textile material ( 32) and said combined adhesive layer (36) has a basis weight of not more than 45 grams per square meter. The female fastener portion (30) according to claim 1, wherein said textile material (32) comprises a basis weight of not more than 40 grams per square meter, preferably not greater than 34 grams per square meter, more preferably no greater than 28 grams per square meter. 3. The female holding portion (30) according to the claims 1 and 2, wherein said textile material (32) has a three-bar warp pattern comprising crimps (38), conduits (40) and ridges (42). The female fastener portion (30) according to claims 1 and 2, wherein said textile material (32) has a warp pattern of two bars comprising conduits (40) and flanges (42). The female fastener portion (30) according to claim 1, wherein said female fastener portion (30) when engaged with said male fastener portion (84) has a drag force resistance value of at least 85. newtons per meter. The disposable absorbent article (50) comprising a body portion (52) having an inner surface (74), an outer surface (76), and said female hold portion (30) according to claims 1 to 5 wherein said substrate (34) comprises a film adjacent said outer surface (76) of said body portion (52) with a layer of adhesive interposed between said film and said external surface (76) of said body portion ( 52). 7. Disposable absorbent article (50) according to claim 6, wherein said film is printed. Disposable absorbent article (50) comprising a body portion (52) having an internal surface (74), an external surface (76), and said female fastener portion (30) according to claims 1 to 5 in where said substrate 34 comprises said outer surface (76) of said portion (52). 9. Disposable absorbent article (50) according to I to claim 8, wherein said external surface (76) of said body portion (52) is printed.