JP5043293B2 - Female materials for mechanical fasteners and disposable diapers - Google Patents

Description

  The present invention relates to a female member for a fastener, in particular, a mechanical fastener (hereinafter, also referred to as a hook-and-loop fastener) of a system that establishes a mechanical fastening state by joining surfaces to each other. The female material of the present invention is particularly useful in a hook-and-loop type fastener that performs mechanical fastening by entanglement, engagement, etc. of a female material and a male material. The present invention also resides in a disposable paper diaper including a female material that can be seen through a picture and has a sufficient engaging force.

  As is well known, various hook-and-loop fasteners have been proposed and widely used for fixing industrial parts, electronic parts, building materials, etc. from joining, fixing, and binding of fiber products, plastic products, paper products, and the like. A typical example of a hook-and-loop fastener is a hook-and-loop fastener, which is widely used as a fastener for clothing. A hook-and-loop fastener usually consists of a combination of a hook tape (male material) having a hook on its surface and a loop tape (female material) having a ring-shaped pile on its surface.

  In recent years, hook-and-loop type fasteners and other hook-and-loop fasteners are mainly used to attach and fix an open-type disposable paper diaper to a wearer. In these surface fasteners, any of woven fabric, knitted fabric, and non-woven fabric is usually used as the female material. For example, a female material using a woven fabric has a higher shear stress in the engaged state when compared to a female material using other materials, and is superior in durability when repeated engaging and disengaging operations are performed. know. However, this type of female material has a problem that it tends to shrink on the other hand, and requires careful handling. In addition, when attaching and fixing such hook-and-loop fasteners to absorbent articles such as disposable paper diapers, it is necessary to fix them using a pressure-sensitive adhesive or the like. When an adhesive is used, it is necessary that the female material is non-porous, in other words, has a high density.

If the female material is made non-porous, the manufacturing cost of the hook-and-loop fastener and therefore the disposable paper diaper increases. Therefore, Patent Document 1 bonds a loop-shaped fiber material having a basis weight of 40 g or less per 1 m ^2. The female fastener part supported by the board | substrate through the agent layer is proposed. According to the present invention, by using a synthetic resin for the substrate that supports the fiber material, even with a relatively low-density loop-shaped fiber material, the female fastener portion having excellent operability without increasing the manufacturing cost can be obtained. Can be provided. However, in the case of this female fastener part, since the adhesive is partially exposed to the outer surface, the loop-like fiber material is also easily adhered to the adhesive layer, and this tendency is based on the basis weight as described above. It becomes more conspicuous when the sword is dropped, and a decrease in engagement force cannot be avoided.

  In order to suppress the sticking of the loop-shaped fiber material to the adhesive layer and to secure the engaging force, Patent Document 2 includes a loop panel composed of a plurality of loop members, and the loop panel is formed by an adhesive having a stripe pattern. Proposes absorbent products that are intermittently attached to the back sheet of absorbent products. However, in the case of this absorbent product, it is not possible to use a loop member in which the basis weight is reduced as described above. Moreover, since the bonding between the loop member and the back sheet is in a partially bonded state, a decrease in the lamination strength cannot be avoided.

  Furthermore, the loop panel, which is a female material, is generally provided to the user in the state of being wound in the form of a roll. However, if the loop panels overlap each other, the loop panel is particularly suitable for infants. As is often seen in disposable paper diapers, etc., if the pattern part that is colored or printed is equipped with a support layer, another loop in which the ink or colorant of the pattern part is located above the gap of the loop member The phenomenon of migration (migration) to the support layer of the panel, the so-called “picking phenomenon”, occurs, causing a problem that the exuded ink is transferred to the support layer. Therefore, when such a picking phenomenon occurs, the quality of the obtained loop panel is lowered and the yield is also deteriorated.

JP 2000-506427 A (Claims, FIG. 1) Japanese Patent No. 3260405 (Claims, FIG. 6)

  It is an object of the present invention to improve a female material used in a hook-and-loop fastener that performs mechanical coupling by entanglement, meshing, etc. of a female material and a male material, so that the porosity or low density is not accompanied by a decrease in engagement force or durability. It is an object of the present invention to provide a female material for a hook-and-loop fastener that can use the engagement element and can be manufactured at a low cost.

  Another object of the present invention is to provide a female material for a hook-and-loop fastener that does not cause a so-called picking phenomenon even when wound in the form of a roll, and can prevent deterioration in quality and yield.

  Furthermore, the objective of this invention is providing the female material for hook_and_loop | surface fasteners which can raise a commercial value by providing the pattern which can be seen through, when it uses for a disposable paper diaper and its similar product.

  Furthermore, the objective of this invention is providing the disposable paper diaper which is high quality and has the outstanding commercial value.

  These and other objects of the present invention will be readily understood from the following detailed description.

In one aspect of the present invention, a female material for a mechanical fastener that performs mechanical coupling by entanglement, engagement, etc. of a female material and a male material,
The female material is a laminate of a base material, a porous fastening layer supported by the base material, and an adhesive layer disposed between the base material and the fastening layer and fixing both, The adhesive layer is applied in a discontinuous pattern on the base material, and the adhesive contains an anti-blocking agent, and a pattern layer is further provided on the front surface and / or the back surface of the base material. Is formed in the female material for mechanical fasteners.

  Moreover, this invention exists in the disposable paper diaper provided with the female material for mechanical fasteners of this invention in the other surface. The disposable diaper of the present invention is preferably an open type disposable diaper.

  As will be understood from the following detailed description, according to the present invention, a porous or low-density engagement element is used in the production of a female material for a mechanical fastener without a decrease in engagement force or durability. Therefore, the manufacturing cost can be kept low.

  In addition, according to the present invention, even when a pattern portion formed by printing or the like is included in a female material, it is possible to prevent a phenomenon in which ink migrates when wound into a roll form, that is, a so-called picking phenomenon. Therefore, it is possible to prevent deterioration in quality and yield.

  Furthermore, according to the present invention, since the female material is provided with a see-through pattern portion, the designability and commercial value of the product can be enhanced when it is used for disposable paper diapers and similar products.

  The female material for mechanical fasteners and the disposable paper diaper according to the present invention can be advantageously implemented in various forms. Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  The present invention resides in a female material for a mechanical fastener that performs mechanical coupling by entanglement, meshing, and the like of a female material and a male material. FIG. 1 is a cross-sectional view showing a preferred embodiment of a female material according to the present invention, and FIG. 2 is an exploded view schematically showing the layer structure of the female material shown in FIG.

  As shown in the figure, a female member 10 includes a base material 1, a porous or low-density fastening layer 4 including a female engagement element (loop member in the figure) 5 supported by the base material 1, and a base material 10. It consists of a laminated body with the adhesive layer 3 arrange | positioned in order to fix both between the material 1 and the fastening layer 4. FIG. Although the checkered pattern is shown in the figure, the adhesive layer 3 needs to be applied on the base material 1 in a discontinuous pattern. Moreover, although the adhesive layer 3 consists essentially of an adhesive, in the case of the present invention, it is necessary that the adhesive layer contains an antiblocking agent as will be described in detail below. is there.

  Furthermore, the base material 1 needs to have the pattern layer 2 further on the front surface and / or the back surface. Further, in the case of the female material 10 of the present invention, the pattern layer 2 applied to the base material 1 is substantially visible from the upper side through the fastening layer 4 thereon. That is, the picture layer 2 can be seen through to the extent that the outline and color tone of the picture can be sufficiently understood, although it may not be clear because the fastening layer 4 is formed of a porous material. Further, since the pattern is not directly observed but is seen through the fastening layer 4, there is an effect that it can be visually recognized as a soft image.

  Furthermore, the laminate of the present invention can be preferably produced according to a dry laminating method, and thus can be referred to as “dry laminate tape” or “dry laminate sheet”. Of course, if desired, a wet laminating method or other conventionally known laminating methods may be used, but a good adhesion between the substrate and the fastening layer can be obtained, so the dry laminating method is optimal. is there.

  Next, details of the configuration and the like of the female material for mechanical fasteners of the present invention will be described.

  In the female material of the present invention, one of the main components is a fastening layer composed of a female engagement element. According to the invention, this fastening layer is supported by the substrate. The supporting substrate is usually in the form of a sheet and can be formed from various materials. Examples of suitable substrates are not limited to those listed below, but are, for example, synthetic resin films such as polyethylene, polypropylene, polyethylene terephthalate, and polyamide, or laminates thereof. If necessary, non-woven fabric, paper (including synthetic paper) and the like may be used as the base material. In addition, since an adhesive bond layer and a pattern layer are provided to a base material, it is preferable to perform the pretreatment for raising the adhesiveness of those layers. Appropriate pretreatments include, for example, performing a corona discharge treatment on the adhesive layer side, and applying a urethane resin coating.

  In the present invention, by providing the base material as described above, the handleability of the female material is improved, and the fastening layer can be formed using a loop material or a woven fabric having a relatively low basis weight. it can. In addition to being able to form an adhesive layer by applying an adhesive to one side (fastening layer side) of the substrate, before or during or after preparing the substrate, the surface or back surface of the substrate It is possible to provide a pattern layer by printing or to embed the pattern layer inside the substrate. In particular, by adding a pattern layer, it is possible to display a guide (line pattern) for the locking position of the male engagement element, and to decorate the character design that is popular with young children, thereby increasing the value of the product. Can do.

  The fastening layer is also supported by the substrate as described above and is stably fixed by the adhesive layer. However, the adhesive layer is not applied entirely on the substrate as in the prior art, but is applied partially in a discontinuous pattern. Formation of the adhesive layer patterned in a discontinuous manner can have various effects, as will be described below.

  In providing a low-cost female material, a low basis weight of the fastening layer, typically a loop material (or woven fabric), is one of very effective means. One of the methods for lowering the basis weight is to reduce the density of the knitting, so-called course down and wale down. This increases the exposed area of the agent layer. As a result, the loop material and the adhesive layer are likely to stick to each other. As a result, the number of loops engaged with the opposing hook material is reduced, and the engagement force is reduced. However, according to the knowledge of the present inventors, this kind of problem can be solved by applying the adhesive layer partially on the surface of the substrate in a discontinuous pattern. That is, by creating a part that does not have an adhesive on the surface of the base material, the loop material will not stick to the non-adhered part, and even when a low basis weight loop material is used, sufficient engagement force is secured and maintained. can do.

  Further, in the female material of the present invention, the part having no adhesive, that is, the non-adhesive part is discontinuous in both the traveling direction (that is, the longitudinal direction) and the width direction of the base material when the female material is manufactured. It needs to be formed to exist. This is because the female material is usually supplied in the form of a roll, but in the production thereof, a wide base material and a fastening layer are laminated through an adhesive, and then a predetermined width is determined in advance. It is because it cuts with the slit line made and is made into the state of a roll. In such a manufacturing process, a pattern in which the non-coating part (non-adhesive part) of the adhesive is continuous in the longitudinal direction, as in the case of vertical stripes, is used when the non-coating part overlaps the slit line. Since the fastening layer and the fastening layer are separated from each other, it becomes difficult to cut the fastening layer in particular, and fraying and fluffing of the end face occurs. In addition, the female material is unrolled from the rolled state on a production line of disposable paper diapers and cut at a constant interval, but a pattern in which non-coating portions (non-adhesive portions) are continuous in the width direction as in horizontal stripes. In the case where the non-coating portion overlaps with the cutting line, the fastening layer is particularly difficult to cut as in the case of the above-described vertical stripe, and fraying and fluffing of the end surface occurs.

In addition, when the adhesive layer is applied on the base material in a discontinuous pattern, the distance between adjacent adhesive layers (adhesive portions) can be widely changed depending on the type of pattern to be applied. Usually, it is preferably less than 5 mm. If the distance between the bonded parts is 5mm or more,
The cutting property of the fastening layer is reduced, and fraying and fluffing of the end face become remarkable;
The presence or absence of the adhesive layer can be easily discriminated by visual inspection, and especially when decoration such as character design by printing is performed;
When peeling off the engaged hook material, the fastening layer is greatly lifted and easily peeled off from the base material, so that durability during repeated use is lowered;
Such a problem occurs. More preferably, the spacing between the bonded portions is in the range of about 1.5 to 4.5 mm.

  The discontinuous pattern of the adhesive layer is not particularly limited as long as it satisfies the above-described requirement that the non-adhesive portion having no adhesive does not have continuity. For example, the adhesive may be applied in a combination of regular patterns such as a circle, ellipse, triangle, or quadrangle to form a discontinuous pattern, or a combination of irregular patterns such as a waveform pattern. A discontinuous pattern may be formed. Further, the size of the non-bonded portion per location can be appropriately selected according to the type and required engagement performance of the fastening layer to be used.

  In the formation of the adhesive layer as described above, various types of adhesives used for the production of laminated films can be used as the adhesive. Suitable adhesives are, for example, urethane adhesives, EVA (vinyl acetate) adhesives, acrylic adhesives, vinyl acetate adhesives, and the like.

  In the case of the present invention, it is necessary to use an antiblocking agent in combination with this type of adhesive. The present inventors have discovered that when an anti-blocking agent is dispersed in an adhesive layer of a female material, the above-described picking phenomenon can be prevented and problems such as color transfer can be prevented.

  In the practice of the present invention, fine particles of various materials can be used as an anti-blocking agent. Suitable antiblocking agents are fine particles of inorganic material, fine particles of organic material or a mixture thereof.

  Examples of the fine particles of the inorganic material include the following: silica, calcium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, Aluminum silicate, diatomaceous earth, activated clay, shirasu balloon, calcium silicate, magnesium silicate, amorphous silica, pseudoboehmite, aluminum hydroxide, alumina, lithopone, zeolite, hydrous halloysite, magnesium carbonate, magnesium hydroxide. In particular, silica fine particles and calcium carbonate fine particles are suitable as an anti-blocking agent.

  Examples of the fine particles of the organic material include the following: styrene-based plastic pigment, acrylic-based plastic pigment, polyethylene, microcapsule, urea resin, melanin resin, and the like.

  Antiblocking agents as described above can be used in various sizes. Antiblocking agents usually have an average particle size of about 1-100 μm, but more preferred average particle size is in the range of about 5-80 μm, and the most preferred average particle size is about 10-30 μm. Range. If the average particle diameter of the anti-blocking agent used is less than 1 μm, the desired addition effect cannot be expressed because it is too fine, whereas if it exceeds 100 μm, the effect of the adhesive is adversely affected.

  Moreover, an antiblocking agent can be used in various amounts according to the kind and average particle diameter, the kind of adhesive agent, etc. The antiblocking agent is usually preferably used in an amount of about 5-20% by weight, more preferably about 6-15% by weight, most preferably about 5% by weight, based on the total amount of adhesive. 7 to 13% by weight. If the amount of the anti-blocking agent is less than 5%, it is too small to exhibit the desired effect of addition, and if it exceeds 20% by weight, the effect of the adhesive is adversely affected.

  Further, the adhesive used in the present invention may be used in combination with an additive other than the antiblocking agent, if necessary. Suitable additives are, for example, pigments and dyes to be included in the adhesive, and anti-aging agents.

  The adhesive as described above can be applied to the substrate by a variety of techniques to form a patterned adhesive layer. For example, it is common to apply an adhesive according to a predetermined pattern, coat it, print it, and then dry it. For example, when a printing method is used, a conventional method such as screen printing or gravure printing can be used.

  In the female material of the present invention, the fastening layer can be formed from various female engagement elements based on the structure of the mechanical fastener. In general, hook and loop type fasteners can be advantageously used as the mechanical fastener, so that the fastening layer is preferably made of a loop material. As the loop material, a loop material generally used for hook and loop type fasteners can be used. However, in the case of the female material of the present invention, it is considered to prevent bleeding of the adhesive layer and the picking phenomenon. It is recommended that a suitable loop material be selected and used.

  The loop material is preferably a warp knitted fabric made of a loop yarn constituting a ground structure and a loop pile. This is because the strength and shape retention as a fiber structure can be maintained in the ground structure, and at the same time, a good meshing engagement force with the hook material can be secured with the loop pile.

  In forming such a loop material, various materials can be used as starting materials. Generally, a woven fabric, a non-woven fabric, a knitted fabric or the like can be used alone or in combination, and a loop can be formed by the processing. Examples of the material for the woven fabric include synthetic fibers such as polyester, polyamide, and polypropylene, or natural fibers. Although the fineness of these fibers is not particularly limited, it is usually in the range of about 20 to 220 dtex.

  The loop material preferably has a basis weight of 30 gsm or less. If the basis weight exceeds 30 gsm, it becomes difficult to cut the non-adhesive portion in the sheet cutting step included in the female material manufacturing process or the tape cutting step during diaper manufacturing, and fuzz becomes prominent. In addition, there is a problem that it is difficult to see through the pattern applied to the base material.

  The loop material in the shape of the warp knitted fabric as described above can be formed by using a known technique such as three-sheet warp or weft insertion. Suitable loop materials include, for example, nylon or polyester 3-sheet tricot, nylon or polyester 4-sheet tricot, nylon or polyester weft insertion tricot, and the like.

  Furthermore, the female material of the present invention can be improved or changed as appropriate. For example, as described above, not only a pattern is imparted to the substrate, but also processing such as raising treatment, embossing, printing, dyeing, and coloring can be applied to any part. In particular, the female material that has been subjected to these treatments and processing can be used as a member of disposable paper diapers or other sanitary materials, and can eliminate luster such as luster and shine, and an aesthetically pleasing appearance can be obtained. it can.

  Furthermore, although the female material of the present invention can be manufactured by various methods, it is preferably manufactured simply and at low cost by using a dry laminating method widely used in manufacturing laminated films and the like. be able to. FIG. 3 is a schematic view showing one method for producing the fastening structure of the present invention by a dry laminating method.

  For example, a film used for the substrate, for example, the biaxially stretched polypropylene film 1 is fed from the substrate roller 21 and guided by a pair of rollers 25. Although not shown, a pattern layer printed with color ink is provided on one side of the base film 1. Next, the adhesive 3 is applied in an arbitrary application pattern by the applicator 22 on one surface of the traveling base film 1 and the solvent is removed by drying. As the adhesive, for example, a polyurethane-based adhesive, that is, an adhesive solution in which polyurethane is dissolved in an organic solvent can be used. Furthermore, while making the base film 1 run ahead, the fastening material 4 is paid out from the roller 24 prepared separately, both are crimped | bonded by a pair of heating roller 26, and are laminated | stacked. Finally, the obtained sheet-shaped female material 10 is wound around the winding roller 20. Since the female material 10 is usually wide, when the female material 10 is unwound from the winding roller 20 and used, it can be cut into a necessary width.

  FIG. 4 is a perspective view of a disposable paper diaper to which the female material for mechanical fasteners of the present invention is attached. The illustrated disposable paper diaper 30 is a so-called open type, and is superposed on the outside with a liquid-permeable top sheet 31 superimposed on the inside so as to wrap a liquid-absorbing interior material (for example, a polymer absorber). And a liquid-impermeable back sheet 32. As shown in the drawing, the female material 10 for mechanical fastener of the present invention, which can also be referred to as a frontal film, is attached to the front surface portion of the back sheet 32. The female material 10 is usually attached via an adhesive layer applied to the lower surface of the base material. Further, in the disposable paper diaper 30, a male material 7 that is paired with the female material 10 is attached to the front and back portions of the back sheet 32. The male material 7 consists of the base material 8 and the hook 9 planted in it as shown in FIG. That is, in the case of the disposable disposable diaper 30 shown in the figure, the male material 7 is guided on the female material 10 after being attached to the wearer, and the male material 7 is hooked on the loop material 5 of the female material 10 as shown in FIG. Tangle 9 and fix both. Accordingly, the disposable paper diaper 30 is in the same state as when the wearer wears a pants-type disposable paper diaper.

  Here, the male material used in combination with the female material will be described. In the practice of the present invention, the shape, material, dimensions, etc. of the male material are not particularly limited, and any material can be used according to the shape, size, etc. of the female material.

  In the case of a hook-and-loop type hook-and-loop fastener as shown in FIG. 5, the male member has a hook-like projection protruding from the base material in the Z direction (direction along its thickness), a so-called stem body. The hook-shaped engagement element may be arbitrarily improved or changed as necessary. Usually, a sheet-like base material and a plurality of stem bodies arranged as protrusions on the base material are used. It consists of. For example, the stem body preferably has a top portion such as a disk shape, a mushroom shape, a hook shape, a wedge shape, a tail shape, or the like. This is because such a top portion can be mechanically engaged with the opposing female material better and can be easily attached and detached.

  Although the stem body can be formed from various materials, it is usually preferable to form the stem body from a moldable resin material by any molding method. At the time of molding, the base material and the stem body may be formed separately, but it is preferable to form both of them integrally. A suitable molding material is a flexible elastic resin material, a highly rigid hard resin material, or a combination thereof. Examples of flexible elastic resin materials include styrene elastomers such as styrene-butadiene-styrene and styrene-isoprene-styrene, olefin elastomers such as ethylene-α-olefin copolymers, ester elastomers, amide elastomers, and urethane elastomers. , Vinyl chloride elastomers, silicone elastomers, fluorine elastomers and the like or alloys thereof. In addition, as a rigid resin material having high rigidity, it is called engineering plastic, polyethylene terephthalate, polybutylene terephthalate, nylon, polycarbonate, polymethyl methacrylate, polyacetal, polymethylpentene, acrylonitrile-styrene-butadiene, polyphenylene ether, polyphenylene sulfide. Examples thereof include polyethylene (for example, high density polyethylene), polypropylene, polystyrene, polyvinyl chloride and the like, or alloys thereof, which are referred to as general-purpose resins.

  The male material as described above can be easily and accurately manufactured using techniques such as injection molding and extrusion molding. For reference, the male material can be advantageously produced by applying the web production method described in International Publication Nos. WO99 / 17630 and WO99 / 17631, for example. The male material is commercially available, for example, as “CS-600 (trade name)” from Sumitomo 3M.

  Subsequently, the present invention will be described with reference to examples thereof. Needless to say, the present invention is not limited to these examples.

Example 1
In this example, the female material (looped engagement element) of the present invention as described above with reference to FIGS. 1 and 2 was produced.

  In order to form the fastening layer, a three-ply tricot (woven fabric) with a loop pile having the following composition was prepared.

Material: Nylon fiber Basis weight: 20gsm
Knitting density: 5.75 wales / cm x 10 courtes / cm
Stitch yarn: 22 / 1dtex
Swing yarn: 22 / 1dtex
Loop yarn: 44/11 dtex

  Moreover, in order to use as a base material, the biaxially-stretched polypropylene film of 12 micrometers thickness was prepared. The character design was printed with color ink on the surface of this film.

Polypropylene film with a polyurethane adhesive through a polyurethane adhesive using a dry laminate method as described above with reference to FIG. 3 by placing a three-piece nylon tricot with its loop pile surface on top. And laminated. Here, as the polyurethane-based adhesive, a commercially available adhesive obtained by adding 7.9% by weight of silica fine particles having an average particle diameter of 10 μm was used. Further, as shown in part of FIG. 2, the adhesive was applied by screen printing so as to obtain an adhesive layer having a checkered pattern and dried. That is, the adhesive layer was a square grid with a side of 2 mm on one side, the adhesive part was 50% of the whole, and the average application amount of the adhesive was about 3.7 g / m ² . . A roll of a laminate sheet having a three-layer structure having a width of about 1 m was obtained. Next, when this laminate sheet was pulled out from the roll and cut with a shear slitter, a loop-shaped engaging element tape having a width of about 210 cm was obtained.

〔Evaluation test〕
The obtained loop-shaped engaging element tape (hereinafter referred to as “test loop material”) was tested according to the procedure described in the following evaluation items.

(1) Evaluation of cutting property The end surface of the obtained test loop material was visually observed, and the cutting property was evaluated in the following two stages.
○: There is little fuzz of the woven fabric and fraying of the yarn.
×: Lots of woven fabric and many frayed yarns.
In the case of this example, as described in Table 1 below, the cutting property was evaluated as good (◯).

(2) Measurement of engagement force In order to measure the engagement force of the test loop material, a hook material suitable for the loop material on the test loop material (manufactured by Sumitomo 3M, trade name: CS-600, pin density 1600 ppi) ) Was pressed and sheared, and then the peel force (N / 25 mm) when peeled at 90 degrees was measured as the engaging force.
In the case of this example, as described in Table 1 below, the engaging force was 3.8 N / 25 mm, which was satisfactory.

(3) Evaluation of Repeated Durability The test process carried out for measuring the engagement force described above was repeated five times, the state of the loop material thereafter was observed visually, and the repeated durability was evaluated in the following two stages.
○: The adhesive layer is maintained as it is, and the fastening layer is not peeled off.
X: The fastening layer is peeled off at the portion where the hook material is engaged.
In the case of this example, as described in Table 1 below, the repeated durability was evaluated as good (◯).

(4) Sensory test A commercially available disposable diaper is prepared, a test loop material is pasted on the side of the diaper, and the hook state (two places on the left and right) already attached to the paper diaper is engaged and peeled off. Ease was evaluated by a sensory test in the following two stages.
○: Engagement is sufficient and does not peel off.
X: Peeling occurs during use.
In the case of this example, as described in Table 1 below, the sensory test was evaluated as good (◯).

Comparative Example 1
Although the method described in Example 1 was repeated, in this example, for comparison, the silica fine particles were not added to the polyurethane-based adhesive, and the adhesive coating pattern was a square grid with a side of 2 mm. To a square grid with a side of 5 mm. As described in Table 1 below, unsatisfactory results were obtained.

Comparative Example 2
Although the method described in Example 1 was repeated, in this example, for comparison, the silica fine particles were not added to the polyurethane-based adhesive, and the adhesive coating pattern was a square grid with a side of 2 mm. Was changed to full coating. The average application amount of the adhesive was 4.0 g / m ² . As described in Table 1 below, unsatisfactory results were obtained in the engagement force and sensory evaluation.

As can be understood from the results shown in Table 1, in Example 1 (example of the present invention), sufficient engagement force and durability were obtained, and peeling of the hook material was not recognized in the sensory test. . Moreover, there was no problem in cutting property, and there was little fuzz on the end face.
On the other hand, in Comparative Example 1, the engagement force is sufficient, but there are problems in durability and cutability. In Comparative Example 2, the engagement force is insufficient, and detachment occurs during wearing of the disposable diaper. It was.

Example 2
The method described in Example 1 was repeated. In this example, a three-ply tricot (woven fabric) with a loop pile having the following composition was prepared for forming a fastening layer.

Material: Nylon fiber Basis weight: 20gsm
Knitting density: 5.75 wales / cm x 10 courtes / cm
Stitch yarn: 22 / 1dtex
Swing yarn: 22 / 1dtex
Loop yarn: 44/11 dtex

  When the laminate sheet was pulled out from the roll of the obtained laminate sheet (loop-like engaging element) having a three-layer structure and visually observed for the presence or absence of picking, it was confirmed that there was no picking.

Comparative Example 3
Although the method described in Example 2 was repeated, in this example, silica fine particles were not added to the polyurethane-based adhesive for comparison.
When the laminate sheet was pulled out from the roll of the obtained laminate sheet (loop-like engagement element) having a three-layer structure and observed for the presence or absence of picking, it was confirmed that a large number of picking occurred.

Comparative Example 4
Although the method described in Example 2 was repeated, in this example, the amount of silica fine particles added to the polyurethane-based adhesive was changed from 7.9 wt% to 2.8 wt% for comparison.
When the laminate sheet was pulled out from the roll of the obtained laminate sheet (loop-like engagement element) having a three-layer structure and observed for the presence or absence of picking, it was confirmed that a large number of picking occurred.

Example 3
Although the method described in Example 2 was repeated, in this example, the amount of silica fine particles added to the polyurethane adhesive was changed from 7.9 wt% to 5.4 wt%.
Pull the laminate sheet from a roll of the laminate sheet obtained three-layer structure (loop-like engaging elements), to observe whether picking visually, but picking occurs at about 10 points per 1 m ^2, which Was confirmed to be within an acceptable range.

Example 4
Although the method described in Example 2 was repeated, in this example, the amount of silica fine particles added to the polyurethane adhesive was changed from 7.9 wt% to 10.3 wt%.
When the laminate sheet was pulled out from the roll of the obtained laminate sheet (loop-like engaging element) having a three-layer structure and visually observed for the presence or absence of picking, it was confirmed that there was no picking.

It is sectional drawing which showed one preferable form of the female material for mechanical fasteners by this invention. It is the exploded view which showed typically the layer structure of the female material shown in FIG. It is the schematic diagram which showed 1 method which manufactures the female material of this invention by the dry lamination method. It is a perspective view of the disposable paper diaper which attached the female material for mechanical fasteners of this invention. It is sectional drawing which showed the use condition of the female material of this invention in the disposable paper diaper of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base material 2 Picture layer 3 Adhesive layer 4 Fastening layer 5 Loop 7 Male material 8 Base material 9 Hook 10 Female material 30 Disposable paper diaper

Claims (11)

A female material of a mechanical fastener that performs mechanical coupling by entanglement, engagement, etc. of a female material and a male material,
The female material is a laminate of a base material, a porous fastening layer supported by the base material, and an adhesive layer disposed between the base material and the fastening layer and fixing both, The adhesive layer is applied on the base material in a discontinuous pattern, and the adhesive contains an antiblocking agent, and a pattern layer is further provided on the front surface , back surface , or both surfaces of the base material. The female material for mechanical fasteners characterized by being formed.   The female material according to claim 1, wherein the female material is a dry laminate tape.   The female material according to claim 1 or 2, wherein the anti-blocking agent is fine particles of an inorganic material, fine particles of an organic material, or a mixture thereof. The fine particles of the antiblocking agent, a female member according to 請 Motomeko 3 you characterized by having an average particle diameter of 1 to 100 [mu] m.   The female material according to any one of claims 1 to 4, wherein the mechanical fastener is a hook-and-loop type fastener, and the fastening layer is made of a loop material.   The female material according to claim 5, wherein the loop material is a warp knitted fabric made of a loop yarn constituting a ground structure and a loop pile.   The female material according to claim 5, wherein the loop material has a loop formed by processing a woven fabric, a non-woven fabric, a knitted fabric, or a combination thereof on a surface thereof.   The female material according to any one of claims 1 to 7, wherein the pattern layer is substantially visible from a side of the fastening layer.   The female material according to any one of claims 1 to 8, wherein the female material is wound into a roll form.   The female material according to any one of claims 1 to 9, wherein the female material is attached to a disposable paper diaper.   The disposable paper diaper provided with the female material of any one of Claims 1-8.

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