JPH07171011A - Surface zipper female material and its production - Google Patents

Abstract

PURPOSE:To provide a surface zipper female material which is not unraveled at a cut face, has good dimensional stability and is usable for throw-away products, such as operation clothing and diaper covers, by forming the surface zipper female material by forming many loops of fibers on a web. CONSTITUTION:Any of synthetic fibers, semi-synthetic fibers, regenerated fibers and natural fibers are usable as the fibers of the web forming the loops and are preferably thermally shrinkable acrylic fibers, polyamide fibers and acrylic fibers. The web to be needled may be a web of a single or multiple layers. The fineness of the fibers of the web may be preferably >=1 denier and more particularly preferably >=3 denier. The loops of the female material formed by needle punches which are higher in density and are larger in quantity are more preferable in terms of joining force to a male material. The height of the loops is preferably >=0.3mm and more preferably >=0.5mm. The number of the loops is preferably >=10 pieces, more particularly preferably >=30 pieces per 1cm<2>. The loops are produced by subjecting the web to needle punching.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple female fastener for use mainly in disposable applications such as surgical clothes, clothes such as underwear, and diaper covers.

[0002]

2. Description of the Related Art Conventionally, a surface fastener has a female material in which a loop-shaped or arch-shaped female element is formed on one side of a woven fabric or the like.
A male material having a napped male element such as a hook-shaped or mushroom-shaped bulge shape that engages with the female element formed on one surface of a woven fabric or the like is attached to a fabric, and both fabrics are pressure-bonded to each other. It is used as a fitting. For example, a female surface fastener is formed from a knitted fabric having a multifilament or monofilament loop of synthetic resin such as nylon or polyester or an arch-shaped female element on one surface, while a male material of the surface fastener is nylon or polyethylene. A napped male element having a hook-shaped or mushroom-shaped expanded shape of a monofilament such as polypropylene is formed on one side of a woven fabric or the like. When such a female surface fastener member and a male surface fastener member are joined together, a very strong joining force can be obtained. However, depending on the application, there is a case where the joining force is not so strong. In such a case, the joining force was reduced by reducing the joining area of the male and female surface fasteners. Since the small piece of the female hook-and-loop fastener is too small, the work of attaching it to the diaper cover, clothes, underwear, shoes, bags, etc. was troublesome and troublesome. Further, since the surface fastener female material has a pile knit structure, it has poor dimensional stability and is difficult to use.

[0003]

SUMMARY OF THE INVENTION The present invention solves such a problem, and particularly aims to provide a female surface fastener member suitable for a disposable product at a low cost by a simple manufacturing method. It is what

[0004]

The present invention achieves the above object, and is a female surface-fastener having a loop of a large number of fibers formed in a web, preferably a shrinkable web, and a nonwoven fabric in which the web is spunbonded. Layered on a base cloth such as
TECHNICAL FIELD The present invention relates to a female surface fastener member having a large number of fiber loops formed by needle punching and a method for manufacturing the same.

The fibers of the web forming the loop include
Usually, it may be any of synthetic fiber, semi-synthetic fiber, regenerated fiber, and natural fiber, but heat-shrinkable acrylic fiber, polyamide fiber, and polyester fiber are more preferable. Also,
The web may be a short fiber web such as staple, a long fiber web such as spunbond or the like, or a mixture thereof. The needling web may be a single web or a multilayer web, or may be a web laminated on a base fabric such as a spunbond nonwoven fabric or a split fabric. In particular, when the web or the base fabric is heat-shrinkable, the density of loops formed is high, which is more preferable. Basis weight of the web is preferably ^{10~100g / m 2, 15~70g / m} 2 is more preferable.

It is preferable that the web or the base fabric is stretchable, since it does not impair the stretchability of the fabric when it is used for a fabric such as clothes and diaper covers. Examples of stretchable webs or base fabrics include polyurethane spunbonded nonwoven fabrics and nonwoven fabrics having a three-dimensional crimp, which can be suitably used.

The fibers of the web preferably have a fineness of 1 denier or more, more preferably 3 denier or more. When the fineness is less than 1 denier, the loop may be easily worn and it may be difficult to bond with the male material. As the strength of the fiber, the single fiber strength is preferably 2 g / denier or more,
When the amount is less than 2 g / denier, when the male fastener material is joined and peeled off from the surface on which a large number of loops are formed, the formed loop may be cut or the joint strength may be reduced by repeated use. It is not preferable.

Further, the female material loop formed by needle punching has a higher density in view of the joining force with the male material,
Moreover, it is preferable that the number is large. The loop height is 0.3
mm or more is preferable, and 0.5 mm or more is particularly preferable. If the height of the loop is less than 0.3 mm, it may be difficult to join with a napped male element such as a hook-shaped or mushroom-shaped bulge shape of a fastener male material, and it may be difficult to obtain a satisfactory joining force. Not preferable. The number of loops is 1c
It is preferably 10 or more, and particularly preferably 30 or more per m ² . When the number of loops is less than 10 per 1 cm ² , the number of loops is so small that the bonding strength may be poor, which is not preferable. The loop is produced by needle punching on the web or from the web side when laminated with the base cloth, and the needle density is 20 to 300 /
cm ² is preferable, and 40 to 150 lines / cm ² is particularly preferable.

The needle used for the needle punch is not particularly limited, but the blade cross section of the needle is triangular or substantially square, and a plurality of barbs such as three or four barbs are arranged at positions equidistant from the tip of the blade. In the case of a so-called crown barb needle, the height of the loop to be formed is substantially constant, so that the joining force is likely to be substantially constant, which is preferable. Further, in the case of a so-called fork needle, the loop is formed in a bundle shape, so that the joining force is likely to be high, which is preferable.

When the web is sufficiently fixed, a loop is formed on one side and then the web on the other side is treated with an adhesive substance. As the adhesive substance, a general synthetic resin, an adhesive such as synthetic rubber, for example, an acrylic resin,
Adhesives such as polyurethane resin, polyethylene resin, polyvinyl alcohol resin, polyvinyl chloride resin, NBR, and SBR can be used in emulsion, solvent, etc., and the optimum adhesive may be selected depending on the type of web. As a fixing method, an emulsion type or solvent type adhesive is applied to the other surface of the web not forming a loop, a molten resin is extruded from the T die onto the web, or a heat-fusible film is applied. The other surface of the web can be sufficiently fixed by laminating it on the web in a heated state. The sticking makes it difficult for the web loop to come off, so that the joining force can be further increased when the web is used as a fastener.

When a web having a large number of loops on the surface of the invention of this application is used as a female member for a surface fastener, the cut end is not broken and the dimensional stability is good as compared with the conventional pile knitted fabric, so that it is suitable for sewing. It is easy to handle. When a fiber having a single fiber fineness of 2 g / denier or more is used as the constituent fiber of the loop, the fiber is less likely to be cut at the time of peeling after being joined to the male element, so that repeated peel strength can be significantly improved.

The invention of this application will be described more specifically below with reference to examples. The joining force was tested as follows. [Adhesive strength test method] The peel strength and tensile shear strength, which indicate the bonding strength between the male and female members of the surface fastener, are JIS L3.
It carried out according to the test method of the surface fastener of 416. An effective width of the fastener of 1 cm as a joining roller for joining the female material of the test piece to the mushroom tape as a male material.
A cylindrical roller with a smooth surface which can be loaded with a load of 2 kgf was used. Peel strength is 25m effective width
A male material of m and a test piece of female material having an effective width of 25 mm were overlapped with each other by 3 cm with the end portions in the same direction, and the joining roller was reciprocated two times to join. Next, the other ends are attached to the grips of the tensile tester for 5 cm, and the pulling speed is 20 c.
It was peeled off at m / min. The peel strength per unit width of 1 cm (gf / cm) was obtained by taking the average value of the maximum value and the minimum value of 5 points of each test piece shown when peeling. Next, regarding the tensile shear strength, a male material having an effective width of 25 mm and a test piece having an effective width of 25 mm were overlapped with each other by 3 cm with the end portions facing in opposite directions, and the joining roller was reciprocated two times for joining. Next, the other end portions were attached to the grips of the tensile tester and pulled at a pulling speed of 20 cm / min. The maximum value of each test piece shown at the time of separation was measured and used as the tensile shear strength (kgf / cm ² ) per unit area. All the results are represented by the average value of 5 test pieces.

[0013]

【Example】

Example 1 A 3 denier, 76 mm heat-shrinkable acrylic fiber web having a basis weight of 30 g / m ² was needle-punched with a crown barb needle at a needle density of 50 needles / cm ² and a needle depth of 10 mm, and a large number was formed on one side. Forming a loop of 16
After heat-treating at 5 ° C for 3 minutes to shrink the area by 25%, a binder made of an emulsion containing butyl polyacrylate as a main component is applied to the other surface with high viscosity and heat-treated at 130 ° C for 3 minutes to form a loop. Fixed more firmly. The produced surface fastener female material has a basis weight of 73 g / m ² and a thickness of 0.8.
It had a peel strength of 9 mm, a peel strength of 33.7 gf / cm, and a tensile shear strength of 0.28 kgf / cm ² .

Example 2 A web of 6 denier, 76 mm polyester fiber having a basis weight of 15 g / m ² was laminated on a base fabric of polypropylene spunbonded nonwoven fabric having a basis weight of 20 g / m ² , and was applied from the web side by a crown barb needle. Needle density 50 / cm
^{2. After} needle punching with a needle depth of 10 mm to integrate and form a large number of loops on the surface of the spunbonded nonwoven fabric, heat-treat at 165 ° C. for 3 minutes to shrink the spunbonded nonwoven fabric by 25% in area, A binder made of an emulsion containing polybutyl acrylate as a main component was bubble-impregnated from the web side and heat-treated at 130 ° C. for 3 minutes to more firmly fix the loop. The produced surface fastener female material has a basis weight of 76 g / m ² , a thickness of 1.55 mm, a peel strength of 46.0 gf / cm, and a tensile shear strength of 0.35 kg.
It had f / cm ² .

Example 3 A web having a basis weight of 15 g / m ² made of 6 denier, 76 mm polyester fiber was laminated on a web having a basis weight of 15 g / m ^{2 made} of 3 denier, 76 mm heat-shrinkable acrylic fiber, and a polyester was prepared. From the web side of the fiber, needle punching is performed with a crown barb needle at a needle density of 100 needles / cm ² and a needle depth of 8 mm to integrate them, and to form a large number of loops on the web side surface of the acrylic fiber,
In the same manner as in Example 1, after heat-treating at 165 ° C. for 3 minutes to shrink the area by 25%, the melted polyethylene resin was extruded from the T-die to a thickness of 30 μm on the web side of the polyester fiber, and crimped with a roll to form a loop. Fixed more firmly. The produced surface fastener female material has a basis weight of 70 g / m.
² , thickness 1.18 mm, peel strength 27.4 gf / c
m, and the tensile shear strength was 0.27 kgf / cm ² .

Example 4 6-denier, areal weight made of 76 mm polyamide fiber 5
A 0 g / m ² web was needle punched with a crown barb needle at a needle density of 100 needles / cm ² and a needle depth of 8 mm to form a large number of loops on one side and 120 on the other side.
A heat-fusible film having a thickness of 30 μm and made of an ethylene-vinyl acetate copolymer resin heated to 0 ° C. was laminated and pressure-bonded with a roll to more strongly fix the web. The produced surface fastener female material has a basis weight of 72 g / m ² , a thickness of 0.82 mm,
Peel strength 48.4 gf / cm, tensile shear strength 0.2
It had a pressure of 7 kgf / cm ² .

Example 5 A polypropylene resin melt-spun and a spunbond web having a basis weight of 60 g / m ² accumulated on a conveyor net was prepared.
After slightly thermocompression-bonding, needle bar punching was performed with a crown barb needle at a needle density of 80 needles / cm ² and a needle depth of 8 mm to form multiple loops on one side and 150 ° C. on the other side.
It was pressed against the heating drum of and fixed firmly. The produced surface fastener female material has a fabric weight of 65 g / m ² and a thickness of 0.85 m.
m, peel strength 49.3 gf / cm, tensile shear strength
It had 0.34 kgf / cm ² .

[0018]

EFFECTS OF THE INVENTION The surface fastener female material of the invention of the present application is, as compared with the conventional surface fastener female material having the structure of the pile knit, not easily cut, has good dimensional stability, is easy to handle during processing, and has a low Since it can be produced at low cost, it is suitable for use in disposable products such as surgical gowns, diaper covers, and packaging materials.

Claims (6)

[Claims] 1. A surface fastener female member characterized by comprising a web having a large number of loops formed on one surface. 2. The surface fastener female member according to claim 1, wherein the web is a single layer or a multilayer. 3. The surface fastener female material according to claim 1, wherein a base cloth is laminated on the web. 4. The surface fastener female material according to claim 1, wherein the web or the base cloth is heat-shrinkable. 5. A surface fastener female material, characterized in that a web or a web and a base cloth are needle-punched from the web side to form a large number of loops on one side of the web, and the other side is fixed with an adhesive substance. Production method. 6. A method for manufacturing a female member for a surface fastener, which comprises subjecting the web or the web according to claim 4 and a base fabric to needle punching and then heat-shrinking the web.