KR20010020353A - Adhesive-free female fastening portion for a mechanical fastening device - Google Patents

Abstract

The present invention provides a textile material 32 which can be engaged with the complementary male fixing portion 84 and is disposed adjacent the substrate 34 and can be bonded without adhesive to the substrate 34. And wherein the textile material 32 has a basis weight of 60 g / m ² or less. In another aspect of the present invention, the male fastener 30 is applied to the disposable absorbent article 50.

Description

Adhesive-free fixing part for mechanical fixing device {ADHESIVE-FREE FEMALE FASTENING PORTION FOR A MECHANICAL FASTENING DEVICE}

Disposable absorbent products, in particular disposable diapers, are well known manufactured products designed primarily for wear by infants and incontinents. Such diapers are worn around the wearer's lower torso and contain urine and other body secretions, such as dirt, wetting or similar contamination of objects that may come into contact with such diapers during use (eg, clothing, bedding, other bodies, etc.). To prevent.

When using disposable diapers, the diaper user fits the diaper to the wearer and secures it around the waist of the wearer with the aid of a fastening device that performs side closure. Matching the diaper around the wearer generally requires the front and rear waist portions of the diaper to overlap each other. Since proper and consistent fit around the wearer's waist and legs is important for optimal performance in terms of minimizing leakage of body secretions out of the diaper, diaper fasteners are effective to keep the front and rear waists overlapped. It must be possible to provide side seals. When the diaper is worn, the overlapped portion is forced to move some relative to each other. Unless such movement is otherwise limited, the mating and containment properties of the diaper deteriorate as the diaper is worn. Therefore, the fixing device must be designed to engage securely so that it is not separated by the peeling force and shear stress that the fixing device faces during use.

The use of fastening devices for fastening the front and rear portions on disposable absorbent articles is well known. Examples of adhesive tape tab fasteners are disclosed in US RE 26,151, US 3,848,594, US 4,985,025, EP 0 286 030 and in many other prior art documents. While tape tab fasteners provide a fastening means for fitting a disposable absorbent product around the waist of the wearer during use, they are not completely satisfactory. Such fasteners are often only useful for the initial fit of a disposable absorbent product, and reassessment is not a secondary advantage. In addition, the fixing device exhibits unsatisfactory resistance to contamination from oils and powders. Therefore, the prior art literature discloses many alternatives as possible solutions to this drawback. Mechanical fastening devices, for example, have been designed and disclosed in many documents, for example in US 3,110,3112, US 4,259,957 and EP 0 235 014. Such mechanical fixation devices exhibit reduced sensitivity to contamination and have the advantage of restockability. In conclusion, these mechanical locks have been popular for many years. These mechanical locking devices generally consist of two elements comprising a male fastener comprising a loop material and a male fastener comprising a hook fastening material.

After the main advantages of the mechanical fastening device for the adhesive tape tab fastening system were established, problems arising in connection with the adhesive-type fastening were found. Typically the shaped fastener comprises a textile material. It has been recognized that adhesive adhesion of textile materials to base materials affects the functional behavior of the loop. In general, the adhesive spreads through the textile material structure such that the loops cling to the textile material and the representative portion of the loop tends to be completely ineffective in engaging the hook fixing material of the male fasteners.

To solve this problem, US 5,554,239 has focused on using a lower basis weight in the first area of the adhesive to prevent bleeding from the first area to the loop material. Nevertheless, using a higher basis weight on the periphery of the loop material in the second region of the adhesive resulted in bleeding, resulting in the loop material becoming inoperative. Thus, the functional action of the loop material for engagement is greatly impaired and in some cases destroyed.

In contrast, European Patent Application No. 9606398, filed May 23, 1996, describes an assembly for use as a female fastener on a disposable absorbent article, wherein the first and second layers are secured to each other by means of thermal bonding, and A preferred embodiment is disclosed comprising a loop component coupled to a second layer. The first layer is dense and the second layer is formed by interweaving the yarns in a warp or weft manner. US 5,256,231 discloses a sheet of loop material which is to be cut into pieces to form a loop portion for a mechanical fastening device. The sheet of loop material forms a sheet of polymer fibers oriented in the longitudinal direction such that the sheet has an arcuate portion projecting in the same direction from the spaced apart anchor portion, and then extrudes the thermoplastic material into the anchor portion to at least the rear portion around the spaced apart anchor portion. By forming. The nonwoven fibrous sheet has a basis weight of 5 to 300 g / m ² , preferably 15 to 100 g / m ² for applications in which the anchoring device is opened less than 10 times and 75 to 75 for applications in which the anchoring device is opened more than 10 times Have a basis weight in the range of 150 g / m ² . In further embodiments, the yarns may be used in deniers in the range of 50 to 300.

As a result of these prior art attempts, it is recognized by those skilled in the art that it is desirable to provide a female fixation with a very high number of functionally operated loops. It may also be most desirable to reduce the basis weight of the textile material from a functional and aesthetic point of view. Reducing the base weight improves material availability, so that the plate on the substrate underneath the textile material can be more clearly emphasized and the feel can be improved. In addition, using the current technology, it is known that it is difficult to reduce the basis weight of the female fasteners without degrading the performance of the mechanical fasteners, that is, the shear stress and peel force values.

When engaged with the hook retaining material of the male fasteners, from the female fasteners exhibiting excellent functional performance, the low basis weight assembly, which is the most attractive in terms of the use of the material, and a very satisfactory peeling force when engaged with the hook fastening material of the male fasteners A wide range of advantages of the present invention have been found, including having a female anchor, a softer, gentler female anchor, an adhesive-free anchor, and a mechanical anchor resulting in high levels of user satisfaction and trust.

Summary of the Invention

The female fastener of the present invention is one component of the mechanical fastener, and the other component of the mechanical fastener is a male fastener designed to mechanically engage the female fastener. Specifically, the hook-type male fixing portion meshes with the loop-shaped female fixing portion.

In one aspect, the present invention relates to a female fastener for a retractable mechanical fastening device in which the female fastener can engage a complementary male fastener. The male anchor includes a textile material disposed adjacent the substrate. The textile material is adhered to the substrate without the use of an adhesive and has a basis weight of 60 g / m ² or less. More specifically, the textile material of the shaped fastener has a basis weight of 40 g / m ² or less, preferably 34 g / m ² or less, more preferably 28 g / m ² or less. The magnetic fixing part may be thermally bonded or extrusion bonded to the substrate. In a preferred embodiment of the invention, the textile material has a three bar warp pattern comprising loops, courses and wales. In another preferred embodiment of the invention, the textile material has a two-bar warp pattern comprising only short and Wales.

In another aspect of the present invention, the female fastener is applied to a disposable absorbent article, such as a diaper. The substrate to which the textile material is attached may be a film adjacent the body portion with an adhesive layer interposed therebetween, or simply the outer surface of the body portion.

It is believed that the present invention will be better understood from the following detailed description taken in conjunction with the following drawings.

FIELD OF THE INVENTION The present invention relates to an adhesive free female fixture for a repositionable mechanical fixture. Its use is for use on disposable absorbent products.

1 is an enlarged cross-sectional view of a female fixing part according to the present disclosure.

Fig. 2 shows a plan view of the three bar warp braided female fixing part.

FIG. 3 illustrates the structure of a three bar warp braided shaped fixture as shown in FIG. 2.

4 is a partially cutaway perspective view of a diaper embodying the retractable mechanical fastening device of the present invention.

The term "textile" as used herein includes braided material, woven material and scrim. As used herein, the term "disposable absorbent product" means a product that absorbs and contains body secretions, and more specifically, absorbs and contains various secretions secreted from the body located at or proximate to the wearer's body, By a single use is meant a product which is intended to be disposed of (ie they are not to be washed or otherwise restored or reused), preferably recycled, composted or otherwise treated in an environmentally friendly manner. As used herein, the term "diaper" refers to a garment that is generally worn by an infant or incontinent that is pulled between the legs of the wearer and secured around the waist of the wearer. However, the present invention can also be applied to diapers, training panties, incontinence briefs, feminine hygiene garments or other disposable absorbent articles such as panties, bibs, hospital gowns, caps, bandages and the like. As used herein, the term "shear stress" means a distributed force that acts tangently (or along the x / y plane) to the contact surface of the member of the fixing device. Shear stress during wearing of the disposable absorbent article tends to move the members of the fixing device relative to each other. Shear stresses are distinguished from the "peel force" acting on the fixing part of the fixing device to separate and separate each other in the z-direction. Disposable absorbent articles are typically exfoliated in at least three ways. The peel force is checked by the wearer's movement to pull the first and second fasteners away from each other during use, by the user trying to loosen the fasteners during wear, and for contamination of the disposable absorbent product, Generated by a protector to remove the disposable absorbent product from the wearer. The fastening device is preferably resistant (peel resistance) to peel force only for the movement and the method produced by the wearer. Thus, peeling resistance should be high enough to avoid breaking the retaining device during the first two methods, but the guardian should check the contamination of the disposable absorbent product or remove it from the wearer without undue difficulty or tearing other components of the disposable absorbent product. It must be low enough to remove the absorbent product. Although it can resist shear stresses and peeling forces generated by the wearer, it is desirable to devise a fastening device having a sufficiently low peeling force so that the guardian can easily remove the disposable absorbent product or check the disposable absorbent product for contamination.

The retractable mechanical fixing device of the present invention has been found to be particularly useful and beneficial when applied to disposable absorbent articles. The retractable fastening device of the present invention includes a male fastener that can engage a complementary male fastener.

In one aspect of the present invention, a female fastener for a retractable mechanical fastener is disclosed. 1 and 2 show a female fixation 30 that includes a textile material 32 positioned adjacent to the substrate 34 and allows the textile to be bonded without adhesive to the substrate 34. The basis weight of the textile material 32 is 60 g / m ² or less. More specifically, the basis weight of the textile 32 is 40 g / m ² or less, preferably 34 g / m ² or less, and more preferably 28 g / m ² or less.

The female fastener 30 includes a loop fastening material composed of a plurality of loops 38. The male anchorage 30 is a flexible textile material 32 that can include any suitable yarn material. Yarn materials include, but are not limited to, polypropylene, polyethylene terephthalate, polyamide or other similar synthetic or natural fibers. In the preferred embodiment of the present invention, as shown in Figs. 2 and 3, the female fastening portion 30 has a loop 38, a stage 40 (a yarn in the machine direction) and a wales 42 (a yarn in the machine direction). It is formed of a textile material 32 having a three-bar warp braid structure comprising a. Loop 38, stage 40 and wales 42 are preferably polyamides. Stage 40 ranges from 5 to 25 stages 40 per cm, Wales 42 ranges from 3 to 12 Wales 42 per cm, and loop 38 ranges from 10 to 200 per cm ² . This is the range of the loop 38. In a more preferred embodiment of the present invention, the textile material 32 comprises 15 stages 40 per cm, 5 wales 42 per cm and 40 loops per cm ² . Loop 38 of textile material 32 may be formed with a loop height in the range of about 0.2 to 20 mm, a loop denier in the range of 8 to 78 and a basis weight of 60 g / m ² or less. Typically, the basis weight is at most 40 g / m ² , preferably at most 34 g / m ² , more preferably at most 28 g / m ² . The loop 38 may be stabilized by napping, heat curing, or the like.

In another aspect of the present invention, the male fastening portion 30 is 5 to 25 per cm, preferably 15 steps 40 per cm and 3 to 12 per cm, preferably 5 wales 42 per cm. A two-bar warp braid structure comprising:

In particular, the yarns for loop 38, stage 40 and Wales 42 are comprised of yarns having about 1 to 30 individual filaments, and 30 yarns for stage 38, stage 40 One filament for the dragon and one filament for the wales 42 are preferred. Yarn typically has a denier in the range of 8 to 78 denier. In a preferred embodiment of the present invention, the denier value for the loop 38 is 44 denier, and the denier values for the stage 40 and Wales 42 are 22 denier, respectively.

Loop 38 preferably exhibits the same distribution of shear stress and peel force in both directions (C) and (D) (eg, in the direction of elongation of elastic member 66), as is apparent in FIG. Is configured in a manner. Preferred patterns include that the loops are all oriented in the same direction, or half of the loops 38 are oriented in one direction and the other half is oriented in the other direction in a crosswise manner.

Textile material 32 is thermally or extruded bonded to substrate 34 using conventional means known to those skilled in the art. Thermal bonding utilizes heat to bond or stabilize the textile material 32 to the substrate 34. Typically the substrate 34 comprises thermoplastic fibers. All or some of the fibers are used as thermal binders and thus rule out the need to use other types of binders such as latex or resins. The method is relatively simple and the thermal bonding method is changed to meet the requirements for the final product. Extrusion bonding includes extruding the substrate 34 into a textile material 32. Ash 34 is extruded through a die at elevated temperature to form the final product and then cooled.

In another aspect of the present invention, the male fastener 30 is applied to a disposable absorbent article. 4 shows a preferred embodiment of a disposable absorbent article embodying the present invention, namely a diaper 50. Examples of the kind of diaper 50 to which the present invention can be very easily applied are disclosed in US 3,860,003 and US 4,834,735. It will be apparent from the following description that the retractable mechanical fastening device 54 illustrated and disclosed herein can be applied to the body portion 52 of such a diaper 50. On the other hand, the present invention is not limited to any particular diaper structure or appearance.

4 is a partially cutaway perspective view of a diaper 50 embodying the present invention prior to being placed on a wearer. As shown in FIG. 4, the preferred diaper 50 includes a body 52 and a retractable mechanical fastening device 54. The preferred body portion 52 includes a liquid permeable topsheet 56, an absorbent core 58, a liquid impermeable backsheet 60, and an elastically retractable leg cuff 62, each leg cuff ( 62 preferably includes a side flap 64 and one or more elastic members 66. For simplicity, only one elastic member 66 is shown on the side flap 64. The topsheet 56, the absorbent core 58, the backsheet 60, the side flaps 64, and the elastic member 66 can be assembled into a variety of well known geometries, with preferred disposable diaper geometries generally being US 3,860,003. Is disclosed. In a preferred diaper geometry, the backsheet 60 is connected to the topsheet 56, the absorbent core 58 is positioned between the topsheet 56 and the backsheet 60, and the side flaps 64 are absorbent cores. Extending outward along each side edge of 58, the elastic member 66 is operatively connected to each side flap 64.

4 shows a body portion 52 in which the top sheet 56 and the back sheet 60 span the same space and whose length and width dimensions are larger than the length and width of the absorbent core 58. The top sheet 56 is superimposed on the back sheet 60, whereby an edge 68 of the body portion 52 is formed. Perimeter 68 defines an outer periphery or, in other words, an external extension of body portion 52. The perimeter includes a longitudinal lateral edge 70 and a lateral distal edge 72. In the longitudinal direction, the diaper 50 has a first end region 78 and a second end region 80.

Body portion 52 has an inner surface 74 and an outer surface 76. In general, the outer surface 76 of the diaper 50 extends from one edge 72 of the diaper 50 to the other distal edge 72 and the other longitudinal side at one longitudinal side edge 70 of the diaper 50. Extends to the edge 70. When the backsheet 60 is used, it typically forms the outer surface 76 of the body portion 52. The inner surface 74 is the surface of the diaper 50 opposite the outer surface 76 and is typically formed by the top sheet 56 in the illustrated embodiment. In general, the inner surface 74 of the diaper 50 is a surface that spans the same space as the outer surface 76, which is the portion where most of the diaper 50 is in contact with the wearer.

The diaper 50 has a first end region 78 and a second end region 80 extending from the lateral distal edge 72 of the diaper perimeter 68 toward the lateral centerline of the diaper 50. The first end region 78 and the second end region 80 extend at a distance of about half of the diaper 50 such that the end regions 78, 80 make up half of the diaper 50, respectively. Both the first end region 78 and the second end region 80 have a panel 82. The panel 82 is part of the first end region 78 and the second end region 80 that overlap when the diaper 50 is secured around the waist of the wearer. The extent to which the distal regions 78 overlap, and thus the extent to which the panel 82 is formed, will depend on the total dimensions and shape of the diaper 50 and the size of the wearer.

The absorbent core 58 of the body portion 52 is generally compressible, comfortable, nonirritating to the wearer's skin, and may be any absorbing means capable of absorbing and retaining liquids such as urine and other specific body secretions. . Absorbent core 58 may be of various sizes and shapes (eg, rectangular, hourglass, “T” shaped, asymmetrical, etc.) and is a wide variety of liquid absorbent materials commonly used in disposable diapers and other absorbent articles, such as For example, from pulverized wood pulp called airfelt. Examples of other suitable absorbent materials include creped cellulose wading, meltblown polymers including coforms, crosslinked cellulose fibers, tissues including tissue wraps, absorbent foams, absorbent sponges, superabsorbent polymers, absorbent gel materials or any Equivalent substance or mixture of substances. The shape and structure of the absorbent core 58 may also vary (eg, the absorbent core 58 may have various caliper regions, hydrophilic gradients, superabsorbent gradients, or lower average density and lower average base weight capture regions). Or may include one or more layers or structures). However, the total absorbent capacity of the absorbent core 58 must be compatible with the design load of the pull-on diaper and its intended use. In addition, the size and absorbent capacity of the absorbent core 58 may vary to accommodate a variety of wearers, from infants to adults.

The backsheet 60 is impermeable to liquids (eg urine), preferably made of thin plastic films, preferably thermoplastic films, and other flexible liquid impermeable materials may also be used. As used herein, the term "flexible" means a material that is curved and easily conforms to the general shape and appearance of the body. The backsheet 60 prevents the secretions absorbed and contained in the absorbent core 58 from contaminating objects that come into contact with the diaper 50, such as undergarments and bedding. The backsheet 60 may thus comprise a polymeric film, such as a thermoplastic film of polyethylene or polypropylene, or a composite material, such as a film coated nonwoven material. For economic, aesthetic and ecological reasons, the backsheet 60 has an average nominal caliper of about 0.051 mm, ie a calculated caliper, more preferably a calculated caliper of 0.020 to 0.036 mm. Preferably, the backsheet 60 is a flexible polyethylene film. As used herein, the term “polyethylene” film refers to a film made essentially of polyethylene, but polyethylene film can be obtained by adding a small amount of material other than opacity, strength requirement, color, or polyethylene to the film. Various additives may be included to provide other desirable features. The total amount of additives is less than 45% by weight, preferably less than 15% by weight of the film material. In particular, for the opacity of the film, titanium dioxide is used in the range of 2 to 6% by weight of the film, preferably 3.5 to 4.8%. Exemplary films were applied to Tredegar Industries, Inc., Terre Haute, Indiana, or BP-Chemical PlasTec, Rottbukenstrasse, Munich, Germany. Is manufactured by.

The backsheet 60 is preferably textured to provide a more cloth-like appearance. In addition, the backsheet 60 may also allow the secretion to pass through the backsheet 60, for example by microporation, but vapor may escape from the absorbent core 58. The size of the backsheet 60 is determined by the absorbent core 58 and the exact diaper design chosen.

The top sheet 56 of the body portion 52 of the present invention is well curved, soft to the touch and non-irritating to the wearer's skin. The topsheet 56 is also liquid permeable, allowing liquid (eg urine) to easily permeate through its thickness. Suitable topsheets 56 are made from woven or nonwoven webs from a wide variety of materials, such as porous foams, reticulated foams, perforated films, or natural fibers (eg, wood or cotton fibers) or combinations of natural and synthetic fibers. Can be. Preferably, it is made of a material that isolates the wearer's skin from the liquid contained in the absorbent core 58.

There are various fabrication techniques that can be used to fabricate the topsheet 56. For example, the topsheet 56 may be a nonwoven web of fibers. When the topsheet 56 comprises a nonwoven web, the web can be manufactured by spun bonding, carding, wet lamination, melt blowing, hydroentangling, water forming, combinations thereof, and the like. Exemplary topsheet 56 is carded and thermally bonded by means well known to those skilled in the art of textile materials, comprises staple length polypropylene fibers having a denier of about 2.2 and is about 15 to about 30 g has a basis weight of / m ² . As used herein, the term "staple length fiber" means these fibers having a length of at least 16 mm. Suitable topsheet 56 is manufactured, for example, by Veratec Inc., a division of International Paper Company, Walpole, Massachusetts. Topsheet 56 is particularly desirable for incontinence garments comprising molded thermoplastic films.

The female fastening portion 30 of the fastening device 54 provides a means for securing itself and the male fastening portion 84 together to provide a stable side seal and provide a first end region 78 and a second end region ( 80) is kept in the overlapping shape. The female fixation 30 may be located anywhere on the diaper 50 as long as it can engage the male fixation 84 to provide lateral closure. For example, the female fastening portion 30 is engaged on the outer surface 76 of the second distal region 80, on the inner surface 74 of the first distal region 78, or with the male fixing portion 84. It can be located at any other site of the diaper being positioned. In addition, the female fastening portion 30 may be an individual separate element of the diaper 50, such as the top sheet 56 or the back sheet 60. Although the female fastener 30 can take a variety of sizes and shapes and can be provided in a smaller, more economical and ecological size depending on the intended use of the disposable absorbent product, it can be larger than the hook fastening material 88, It is desirable to include one or more separate patches of material that are secured to the body portion 52 to adjust the maximum fit to the wearer's waist.

As shown in FIG. 4, the diaper 50 has a square-shaped female fixation 30 secured to the substrate 34, the substrate 34 being adjacent to the outer surface 56 of the body portion 52. The film 34 or alternatively the substrate 34 is simply the outer surface 76 of the body portion 52. For a first option comprising a film, an adhesive layer is inserted between the film and the outer surface 76 of the body portion 52. The adhesive can include any suitable adhesive, such as hot melt. For example, suitable adhesives are commercially available under the trade names TEF 195 and TEF 688 from Findley Adhesives, Inc., Wawawato, WI.

The retractable mechanical fixation device 54 includes a male fixation 84 that includes a hook fixation material 88. As used herein, the term "hook fixation material" is used to describe a material having engagement elements. The use of the term hook should be non-limiting in that it may include any form known in the art as long as the engagement element is adapted to engage the complementary shaped fixation 30. As shown in FIG. 4, each male anchor 84 provides a locking means for engaging the female anchor 30 to provide a stable side seal for the diaper 50. Thus, the male fastener 84 includes one or more hook fastening materials 88. Each male anchor 84 also preferably comprises means for positioning the hook anchor material 88 adjacent to the male anchor 30 to obtain a side seal. Accordingly, the male fastener 84 can be a fastening means for obtaining side seals on any well known contour and diaper 50, for example the inner surface 74 and / or the outer surface 76 of the body portion 52. Internal fastening members, tape tabs or belts. An exemplary aspect of the internal fastening member is disclosed in US Pat. No. 4,699,622. Aspects of incontinence undergarments using belt support systems are disclosed in US Pat. No. 4,315,508.

Each male anchor 84 most preferably comprises a tape tab 86. Any well known appearance and structure of the tape tab 86 can be used. Tape tab 86 is most preferably provided on both longitudinal side edges 70 of body portion 52 with first distal region 78. Particularly preferred tape tabs 86 have a tape tab fixing surface 90 and a tab back surface 92. The tape tab fixing surface 90 is the surface of the tape tab 86 which is designed to engage the female fixing portion 30 of the present invention. Thus, the tape tab fixing surface 90 of the tape tab 86 will generally correspond to the inner surface 74 of the body portion 52. The tape tab back surface 92 is a surface opposite the tape tab fixing surface 90 and generally corresponds to the outer surface 76 of the body portion 52. Thus, the tape tab back 92 is generally exposed during wear of the diaper 50.

The hook fastening material 88 is preferably connected to the body portion 52 or the tape tab 86. As used herein, the term "connection" means that the hook fastening material 88 can be peeled off the diaper 50 so that the hook fastening material 88 can be removed from the diaper 50 or its position during use, and the hook fastening material 88 is fixed to the diaper. It includes the appearance fixed to 50 stably. The connection also indicates that the hook fixation material 88 can be connected directly to the diaper 50 or indirectly to the diaper 50, for example to secure the hook fixation material 88 to the intermediate member. Or to indicate that it can be attached or fixed in order to be peeled off to the diaper 50 in turn. Preferably, as shown in FIG. 4, the hook fastening material 88 is fixed directly to the connection 102 of the tape tab 86 by the second tab attachment means 112.

In addition, the hook fixation material 88 may be located at any position on the diaper 50. If the male fastener 84 includes an internal fastening member, the hook fastening material 88 is preferably located in the panel 82 of the first distal region 78 adjacent the longitudinal side edge 70. The male fastener 84 includes a tape tab 86, and the hook fastening material 88 is preferably located on at least some or all of the tape tab fastening surface 90, or preferably of the connection 102. Located at least in part or all. Most preferably, the hook retention material 88 is located at the connection 102 on the tape tab retention surface 90.

In order to measure the shear stress and peel force of the male and female anchors 30 and the male anchors 84 of the repositionable mechanical anchoring device 54, reference may be made to suitable test methods disclosed in the section "Initiation of Test Methods". have. The value measured for the selection of the sample (i.e. for the female fixation part 30 when engaged with the male fixation part 84) is at least 500 g for the shear stress and at least 85 Newtons / m for the peel force. , Preferably 4θ <lavage measurement −85 Newtons / m.

In a further aspect of the invention, when the substrate 34 comprises a film adjacent the outer surface 76 of the body portion 52 as disclosed above, the film is printed. In another aspect of the invention where the substrate 34 includes the outer surface 76 of the body portion 52, the outer surface 76 of the body portion 52 may be printed. Printing is performed by means known to those skilled in the art.

In use, the diaper 50 places the first end region 78 below the wearer's back and the rest of the diaper 50 so that the second end region 80 is positioned across the front of the wearer. It is pulled through and applied to the wearer. Then, the hook fastening material 88 positioned on the tape tab fastening surface 90 respectively engages the textile material 32 of the male fastening part 30 to form a side seal. Adjacent to the female fixation portion 30 located on the outer surface 76 of the second distal region 80.

Start of test method

For the purposes of the present invention, the shear stress (using a 500 g weight) and peel force of the female fixation 30 and the male fixation 84 for the retractable mechanical fixation device 54 according to the present disclosure. Disclosed herein are methods for measuring. The test method is applied to the male fastener 30 in the form of a loop raw material and the male fastener 84 in the form of a hook raw material.

Required device

Conditioned room: temperature of 22 ± 2 ℃, adjusted to 50 ± 2% relative humidity

Scissors: One Single Scissor

Test stand: clamps designed to hold 500 g weight and mounted in such a way that samples can be suspended freely

A piece of paper: A piece of cut of a basis weight of 80 g / m ² or its equivalent copy paper 2.54 cm wide.

Loop material: as disclosed above

Hook material: Generally manufactured material of specification 85379

Inch Cutter: Supplied by Thwing Albert Instrument Company, Philadelphia, USA

500g weight: conventional type with clamp

Electrical tensile tester: 100 Newton load cells or equivalent of Zwick GmbH & Co., supplied from Zwick 1445

Sample manufacturing

The test material is adjusted at 22 ° C., 50% relative humidity for at least 2 hours before testing. Prepare a hook sample piece for each loop sample to be tested.

Loop engraving manufacturers

An inch cutter is used to cut pieces (2.54 cm (machine direction) x transverse width) from the loop material. Cut the slices in half. Material orientation should be conscious (loop upwards and loop downwards).

Hook material manufacturer

Remove the outer layer of the sample roll so that no damaged or contaminated hook material is measured. Make sure to unhook the hook from the right side. Tape the hook to a piece of paper 2.54 cm wide and over 10 mm long.

Shear test

-Take a piece of loop and insert it into the clip on the test stand.

-Take a piece of hook and clamp it to a 500g weight clip.

-Take an additional hook piece and press it with the thumb and index finger to the loop piece.

-Loosen it carefully and hang it for 5 seconds.

-Remove the weight from the hook piece.

Remove the sheared sample from the test stand and peel test on a tensile tester.

Device preparation

Before starting the peel test, the tensile tester needs to be calibrated. The criteria should be made according to the manufacturer's instruction manual. The variable should be set as follows:

Gauge Length = 50 mm (0.2 in)

Reserve Force = 0.2 Newtons

Crosshead speed = 305 mm per minute (12 inches per minute)

Measuring distance = 40mm

Peel test

Place the hook piece on the upper (or moving) jaw of the tensile tester.

Place the loop piece on the lower (or stationary) jaw.

Start the test by starting the crosshead.

-The test is repeated for both directions of enclosure.

Report of document

Report each sample that failed the shear test.

Report peak force (Newtons) and average force (Newtons) for the peel test. Samples that failed the shear test will be reported as zero.

Calculate the total mean, standard deviation (maximum and minimum) and mean, standard deviation (maximum and minimum) separately for each orientation.

Print a graph of the peel force curve.

Claims (11)

Retractable mechanical fixation device comprising a textile material 32 that can engage a complementary male fixation 84, disposed adjacent to the substrate 34, and bonded without adhesive to the substrate 34. (54) A female fixture (30), characterized in that the textile material (32) has a basis weight of 60 g / m ² or less. The method of claim 1, The textile material 32 has a gypsum fixation 30 having a basis weight of 40 g / m ² or less, preferably 34 g / m ² or less, more preferably 28 g / m ² or less. The method according to claim 1 or 2, A female fixture 30 in which a textile material 32 is heat bonded to the substrate 34. The method according to claim 1 or 2, A female fixture (30) in which textile material (32) is extrusion bonded to substrate (34). The method according to any one of claims 1 to 4, Shaped fixture 30 in which the textile material 32 comprises a three-bar warp pattern comprising a loop 38, a course 40, and a wales 42. The method according to any one of claims 1 to 4, A female fixation portion 30 having a two bar warp pattern in which the textile material 32 comprises a stage 40 and a wales 42. The method of claim 1, When the female fixing part 30 is engaged with the male fixing part 84, the female fixing part 30 having a peeling resistance value of 85 Newtons or more per m. The inner surface 74, the outer surface 76, wherein the substrate 34 comprises a film adjacent the outer surface 76 of the body portion 52, and an adhesive layer is inserted between the film and the outer surface 76 of the body portion 52. Disposable absorbent product (50) comprising a body part (52) having a magnetic fixing part (30) of any one of claims 1-7. The method of claim 8, Disposable absorbent article 50 with film printed thereon. Body portion having an inner surface 74, an outer surface 76 and the female fixing portion 30 according to any one of claims 1 to 7, wherein the substrate 34 constitutes an outer surface 76 of the body portion 52. Disposable absorbent article 50, including 52). The method of claim 10, Disposable absorbent article 50 having the outer surface 76 of the body 52 printed thereon.