JPH05245002A - Male face fastener and its manufacture - Google Patents

Abstract

PURPOSE:To increase productivity and lower a cost by forming mushroom shapes as the engaging sections of a face fastener, at the tips of semi-loops allowed to project by needle-punching. CONSTITUTION:By piling up thermoplastic resin fibers and thermally bonding fibers, or the thermoplastic resin fibers only, a web 2 is formed. On both the faces of the web 2, needle punching is applied in order, and partial fibers arranged in the face direction of the web 2 are arranged in the perpendicular direction to the web surfaces. By deepening the needle depths further under needling conditions at the time of sheet-forming on a final finish punching step, the partial fibers are allowed to project from the web surfaces, and semi- loops 3 are formed. The thermally bonding fibers are heated to be fused and the web 2 is formed into a sheet so as to have necessary strength as a base material. After that, the fibers are separated by the tip shearing of semi-loops projecting from the one-side punching surface. The tips of the separated projected fibers 3 are melted by heating, and mushroom-shaped engaging sections 4 are formed, and a male face fastener 1 is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a male surface fastener and a method for manufacturing the same, and more particularly to a male surface fastener which is cost-effective and excellent in productivity and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, male surface fasteners have been manufactured by resin molding or a method applying a woven technique (for example, a binding double weave method).

However, such a manufacturing method is not sufficient in productivity and cost performance. From this point of view, the applicant has already applied for a surface fastener having a high productivity using a double russel knitting machine and a manufacturing method thereof (see Japanese Patent Application No. 3-111508). Further improvement in productivity and cost is desired for use in applications such as building materials, civil engineering, and vehicles that need to be done.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a male surface fastener excellent in productivity and cost and a method for producing the same.

[0005]

SUMMARY OF THE INVENTION In view of the above circumstances, the inventors of the present invention have tried various techniques, and as a result, a web made of specific fibers is needle-punched to partially project the fibers from the web. The present invention has been completed by finding that the above problems can be solved by giving a mushroom shape as an engaging portion of a surface fastener to the tip of a half loop formed by protrusion.

That is, the present invention comprises a web consisting of a thermoplastic resin fiber and a thermoadhesive fiber, or a thermoplastic resin fiber only, and a fiber protruding on one side or both sides of the web, and the web has both sides. By needle punching, and when the web is composed of thermoplastic resin fibers and heat-adhesive fibers, by heat-bonding and / or backing with heat-adhesive fibers, and when the web consists of thermoplastic resin fibers only, by backing The present invention provides a male surface fastener which is formed into a sheet, and one or both surfaces of the web serves as an engaging surface, and the tips of the protruding fibers on the engaging surface have a mushroom shape.

The male surface fastener of the present invention will be described below with reference to the drawings. Referring to FIG. 1, a male surface fastener (1) of the present invention comprises a web (2) as a base material and a fiber (3) protruding from the web surface as an engaging portion.

The web consists of thermoplastic resin fibers and heat-adhesive fibers, or of thermoplastic resin fibers only.

The reason why the thermoplastic resin fiber is used is that it is indispensable to melt when the tip of the protruding fiber is melted by heat to give a mushroom shape suitable for engagement. Examples of the thermoplastic resin fiber used in the present invention include fibers such as polypropylene, nylon, polyester, and polybutylene terephthalate. Of these, polypropylene fibers that are easy to give mushroom shapes in production are preferable, and the thickness thereof is 20 to
A range of 150 denier is suitable. If it is less than 20 denier, the strength is not sufficient, and if it exceeds 150 denier, the needle punching treatment cannot be sufficiently performed, which is not suitable.

On the other hand, the heat-bondable fibers serve to bond the constituent fibers of the web to each other to give them morphology. This bonding is based on heat bonding, and fibers having a melting point lower than that of the thermoplastic resin fiber are used. For example, when the thermoplastic resin is polypropylene, a composite fiber PP / PE side-by-side type (ES fiber manufactured by Chisso Corporation), PP
/ PE sheath / core type (NBF fiber manufactured by Daiwabo Co., Ltd.) can be used. It is preferable to use this heat-adhesive fiber together with the thermoplastic resin fiber from the viewpoints of fiber fixability, softening of the feel, and cost, but when a lining is adopted as a sheet forming means, the heat-adhesive fiber is used. Need not be used. When the heat-bondable fiber is used, it can be used up to about 50% with respect to the thermoplastic resin fiber. In addition to these fibers, rayon fiber or the like may be mixed for the purpose of softening the texture, lowering the engaging force and improving the surface touch.

The web in the male surface fastener of the present invention is needle punched. In addition, since the web is inconvenient to handle with a mere fiber deposit, it is formed into a sheet to give it morphology and to retain the strength necessary for use. This sheeting may be performed by heat bonding with the above-mentioned heat-adhesive fiber or as a lining as another method, and can be appropriately used depending on the presence or absence of the heat-adhesive fiber.

Fibers project from both sides of such a web. The protruding fibers on at least one surface exhibit an engaging function as a male surface fastener, and specifically, the tip portion (4) has a mushroom shape for direct engagement. Engage the female surface. On the other hand, the fibers protruding on the remaining other surface are semi-looped.

Further, according to the present invention, (a) a thermoplastic resin fiber and a thermoadhesive fiber, or a thermoplastic resin fiber alone is deposited to form a web, and (b) both sides of the web are sequentially subjected to needle punching to obtain a fiber. Partly protruding,
Forming a semi-looped protrusion, (c) then the web is made of thermoplastic resin fibers by thermal bonding and / or backing with a thermoadhesive fiber if the web consists of thermoplastic resin fibers and thermoadhesive fibers. If it consists of only, the web is made into a sheet by backing, and (d) after shirring the tip of the semi-looped protrusion on one surface of the obtained sheet, or without shirring, (e) the protrusion. The present invention provides a method for producing a male surface fastener, characterized in that the tip is melted by heating to form a mushroom shape.

First, in the present invention, the above-mentioned specific fiber is deposited to form a web. To make the web, for example, equipment generally used for needle punched non-woven fabrics such as cards and cloth wrappers is used. At the time of deposition, the amount is usually in the range of 200 to 1000 g / m ² . In this case, a PP split yarn fabric or the like may be used as the scrim.

Next, the obtained web is subjected to needle punching. This punching is performed in order to arrange a part of the fibers arranged in one direction, that is, in the surface direction of the web, in a direction perpendicular to the web surface. The punching conditions are punch density of 20 to 200 P / cm ² and penetration of 5 to 30 mm.

In punching, special needle processing is performed using a fork type needle or a general type needle in the final finishing punching step. By making the needle depth deeper than the needling condition at the time of forming into a sheet, a part of the fiber protrudes from the web surface to form a half loop. This state is schematically shown in FIG.

After punching, the web is formed into a sheet having the required strength as a substrate. Sheet formation is performed by melting the heat-adhesive fibers by heating. Due to such melting, adhesion occurs between the constituent fibers, morphology is imparted, and sufficient strength is obtained. The heating temperature depends on the type of the heat-adhesive fiber selected, but for example, when ES fiber is used, the heating temperature is 120 to 140 ° C.

Alternatively, the sheeting can be achieved by carrying out so-called backing without heating, for example, by impregnating synthetic latex. In addition,
Both thermal bonding and backing may be performed.

After sheeting, the tips of the half loops protruding on one punching surface are cut off by shirring to form independent protruding fibers (see FIG. 3).

Then, the tips of the protruding fibers separated by heating are melted to form a mushroom shape. It is also possible to perform heating and melting, separation by melting and mushroom formation without performing shearing. For example, when the thermoplastic resin fiber is polypropylene fiber, it is instantaneously heated and melted with a flame of 600 to make the tip into a mushroom.

A male surface fastener is obtained by such mushroom formation (see FIG. 1). The obtained male hook-and-loop fastener has a characteristic that it has a sochito-touch feeling and has a self-engaging property because the mushroom-applying surface and the opposite surface thereof can be structurally engaged with each other. Further, by processing both sides into mushrooms, a special double-sided fastener having double-sided engagement can be easily made. Further, since it is possible to replace the conventional process such as fabric production with a simple web forming process, it is very advantageous in terms of productivity and cost.

The male surface fastener of the present invention thus obtained is combined with an ordinary female surface fastener, or is combined with both surfaces of the fastener of the present invention, or is combined with a general needle punched nonwoven fabric or needle punched carpet, Combined with a loop carpet, it can be suitably used for applications requiring inexpensive fasteners.

The present invention will be described in more detail below with reference to examples.

EXAMPLES Example 1 70% 80 denier polypropylene fiber and 15 denier ES fiber (manufactured by Chisso Corporation) as a heat-bonding fiber 3
0% and 350g / by the needle punching method
A cm ² web sheet was created. In this case, the punch density was 100 P / cm ² and the penetration was 15 mm. Further, a punch density of 50 is added to the obtained web sheet.
Special needle punching was performed from one side using a fork needle under the conditions of P / cm ² and needle penetration of 20 mm.
Next, heating was performed at 140 ° C. to melt the heat-adhesive fiber to perform heat-bonding. The protrusion on the engagement surface of the obtained sheet was cut off by shearing. Then, the tip of the protruding portion was melted with a gas burner heated to 600 ° C. to obtain a male surface fastener of the present invention in a mushroom shape. When this male surface fastener was combined with the female surface of a magic fastener having a loop pile, the feeling was soft and comfortable, and the engaging force was about 800 g / 5 cm width.

[0024]

Industrial Applicability According to the present invention, a male surface fastener having excellent productivity and cost performance, having a sochito touch feeling, a self-engaging property, and a manufacturing method thereof are provided.

[Brief description of drawings]

FIG. 1 is a sectional view schematically showing a male surface fastener of the present invention.

FIG. 2 is a cross-sectional view that schematically shows a part of a fiber protruding from a web by needle punching.

FIG. 3 is a cross-sectional view showing a portion where a tip of a protruding portion is shirred.

[Explanation of symbols]

1: Male surface fastener, 2: Base material web, 3: Protruding fiber, 4: Mushroom-shaped engaging part

Claims (2)

[Claims] 1. A thermoplastic resin fiber and a thermal adhesive fiber,
Or a web consisting only of thermoplastic resin fibers, and a fiber protruding on one side or both sides of the web,
The web is needle punched on both sides, and when the web is composed of a thermoplastic resin fiber and a heat-adhesive fiber, the web is made of only the thermoplastic resin fiber by heat-adhesion and / or backing with the heat-adhesive fiber. In such a case, the web fastener is formed into a sheet by lining, and one side or both sides of the web serves as an engaging surface, and the tips of the protruding fibers on the engaging surface are mushroom-shaped male fasteners. 2. A web is prepared by depositing only (a) a thermoplastic resin fiber and a heat-adhesive fiber, or a thermoplastic resin fiber, and (b) sequentially performing needle punching on both surfaces of the web to partially form the fiber. The protrusion is formed to form a semi-loop-shaped protrusion, and (c) when the web is composed of a thermoplastic resin fiber and a heat-adhesive fiber, the web is bonded by heat-bonding and / or backing with a heat-bonding fiber. When the web is made of a thermoplastic resin fiber only, the web is made into a sheet by lining, and (d) after shirring the tip of the semi-loop-shaped protrusion on one side or both sides of the obtained sheet, or without shirring, ) A method for manufacturing a male surface fastener, characterized in that the tip of the protrusion is melted by heating to form a mushroom shape.