JP2002223817A - Hook-and-loop fastener prevented from fraying - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hook-and-loop fastener which is little inflexible and excellent in texture, as well as develops little fray of base cloth fibers along widthwise edge sections of the hook-and-loop cloth fastener. SOLUTION: The hook-and-loop fastener made of cloth prevented from fraying is characterized in that partial hot-melt adhesive portions are provided along the both edge sections, in the hook-and-loop cloth fastener which is composed of a middle section provided with engaging elements and the both edge sections that are not practically provided with the engaging elements.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hook-and-loop fastener made of cloth, and more particularly, to a hook-and-loop fastener made of cloth which prevents warp fraying from an end in a width direction.

[0002]

2. Description of the Related Art A hook-and-loop fastener is widely used as a material for locking various members, and one of its major uses is attached to clothing. Surface fasteners attached to clothing are often fixed by sewing. As the hook-and-loop fastener to be attached to clothing, a hook-and-loop fastener made of cloth is preferably used in terms of flexibility, texture and the like.
The method of fixing the hook-and-loop fastener by sewing is excellent in terms of fixing force, but the base cloth adhesive layer (back coat agent layer) provided on the hook-and-loop fastener is destroyed by various forces accompanying washing and use of clothes. Or when the adhesive layer is peeled off,
Separation of the warp and the weft constituting the base fabric of the cloth hook-and-loop fastener starts, and the hook-and-loop fastener is frayed at the sewing portion and falls off the clothing.

Conventionally, as a countermeasure against this fraying, a sewing portion of the hook-and-loop fastener, that is, a width direction end portion of the hook-and-loop fastener is melt-cut to prevent separation of the fiber from the terminal, or a region of the width direction end region of the hook-and-loop fastener. It has been proposed to fuse the base fabric to prevent fiber separation across the ends. Since the frays at the ends in the width direction of the surface fastener made of cloth mainly start from the frays of the warp and then the wefts also move and fray, the above-mentioned frays may be simply frayed in the present invention.

[0004]

The prevention of warp fraying of a surface fastener made of cloth can be improved by strengthening the bonding between the base fabric adhesive layer and the fiber. However, in order to strengthen the bonding, the adhesive layer must be strengthened. Since it becomes hard or thick, it is not preferable as a hook-and-loop fastener used by attaching to clothing. Further, even if the base fabric adhesive layer is strengthened, the adhesive layer is deteriorated by various forces applied to the washing and the hook-and-loop fastener when the use period is prolonged, so that there is a limit in preventing warp fraying. In addition, the conventional fiber fusion method at the end in the width direction of the hook-and-loop fastener is excellent in preventing fraying, but sewing is difficult because the fused portion is hard, or the hook-and-loop fastener becomes rigid and the texture is reduced. There are problems such as being damaged. The present invention solves these problems, and is a surface fastener that effectively prevents warp fraying in the width direction of a cloth surface fastener by an improved fusing method.

[0005]

That is, the present invention relates to a cloth surface fastener comprising a central portion having an engaging element and both ends having substantially no engaging element. This is a cloth fastener which prevents fraying, which is provided with a partially fused portion.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A hook-and-loop fastener used in the present invention has one or both of a hook-shaped engaging element and a loop-shaped engaging element erected on a surface of a base fabric obtained by a knitting method. And an adhesive layer for bonding the fibers constituting the base fabric and the fibers constituting the engagement element is provided on the back surface of the base fabric.

[0007] It is essential that at least a part of the fibers constituting the base fabric be made of a thermoplastic resin, since a partially fused portion is provided at both ends. Preferably, most of the fibers constituting the base fabric are thermoplastic resins. Due to the presence of the thermoplastic fibers at both ends, if the ends are partially heated and pressed, the warps at both ends are fused and fixed, and no fraying occurs. Examples of such a thermoplastic resin include polyamides, especially nylon-6 and nylon-66, polyesters such as polyethylene terephthalate and polybutylene terephthalate, and polyolefins such as polypropylene. When the base fabric is a woven fabric, a spun yarn or a multifilament yarn of 100 to 300 dtex is preferably used as the warp and the weft. As the weaving density of such warps and wefts, 40 to 60 yarns / inch is preferable in that the strength and fraying of the base fabric are not easily generated.

The hook-shaped engaging element is a hook-shaped element in which a loop of a monofilament fiber made of nylon or polyester is erected on a base fabric, and a part of a side thread of the loop is cut off.
Alternatively, it includes a mushroom-shaped element in which the top of the monofilament fiber loop is cut, and the free end of the obtained monofilament fiber is thermally melted to form a mushroom-shaped bulge. A multi-filament loop made of nylon or polyester standing on a base fabric is a loop-shaped engaging element, which is used in combination with the above-described hook-shaped engaging element. Further, a hook and loop mixed surface fastener in which a hook-shaped engagement element and a loop-shaped engagement element are erected on the same base cloth is also included in the cloth fastener of the present invention. The density of the hook-shaped engaging elements is preferably 20 to 40 threads / cm ^{2 in} terms of engaging force, and the loop-shaped engaging elements can be engaged with the hook-shaped engaging elements to exhibit a sufficient engaging force. It just needs to exist. The thickness of the fiber constituting the hook-shaped engaging element is preferably 100 to 500 dtex, and the thickness of the fiber constituting the loop-shaped engaging element is preferably 100 to 400 dtex in terms of engaging force. Note that, instead of the loop-shaped engaging element, a nap-cloth having a nap having a long fiber length on the surface can be used as the loop material, and the long nap fiber is engaged with the hook-shaped engaging element. An engaging force is obtained.

The hook-and-loop fastener is usually made in the form of a long tape, and is composed of a central portion where the engaging elements are erected and both ends in the width direction where the engaging elements are substantially absent. Both ends where the engagement element is not substantially present are provided to facilitate sewing when the hook-and-loop fastener is integrated with the fabric by sewing. The width of both ends where the engagement element is not substantially present is preferably 1 to 5 mm.

[0010] In many cases, the base fabrics at both ends are cut without constituting fibers being continuous. This is an industrial method for producing a tape-shaped surface fastener, in which a wide base cloth is formed by weaving an engaging element region corresponding to a plurality of narrow-width surface fastener tapes and a gap having no engaging element, thereby forming a hook-shaped engaging member. This is because a plurality of narrow tape-shaped surface fasteners are obtained by cutting the gap of the wide base cloth after performing processing such as element formation and heat treatment of the engagement element.

The fibers at the end portions in the width direction of the hook-and-loop fastener obtained by this method are merely bonded by the back surface adhesive layer of the base fabric, and when the adhesive layer is broken, the base fabric is removed. It easily separates into the constituent warps and wefts, and the hook-and-loop fastener frays. The hook-and-loop fastener of the present invention has a partially fused portion at an end in the width direction, and prevents warp fraying at the partially fused portion.

A preferred example of the fused portion will be described with reference to the drawings. FIG. 1 is a plan view showing a form of a hook-and-loop fastener according to the present invention, in which a number of engaging elements (for example, hook-like engaging elements) 2 are provided on a base cloth 1 and widthwise ends where no engaging elements exist. 3, 3 '. In FIG. 1, the ends 3, 3 'have a linear, partially fused portion 4 which extends substantially horizontally across the ends. The horizontal partial welds are provided at appropriate intervals. If the gap between the partially fused portions is too wide, if the adhesive layer of the fibers of the base fabric is broken, the fibers will fray considerably and the object of the present invention cannot be achieved. If the interval is too small, the end of the hook-and-loop fastener becomes rigid, which is not preferable. The size of the wire fusion zone is the width (thickness) of the wire.
0.1-1 mm, more preferably 0.1-0.5 mm,
Wire length (depth) 1 to 2.5 mm, more preferably 1
The distance is 2 to 7 mm, more preferably 3 to 5 mm, and more preferably 3 to 5 mm, but is not particularly limited to this, and is set according to the specifications of the surface fastener.

FIG. 2 shows another example of the hook-and-loop fastener according to the present invention. In the drawings after FIG. 2, the illustration of the engaging element at the center is omitted. FIG. 3 is still another example,
It has a partially fused portion 6 of zigzag filaments. 2 and 3, since the end fibers of the hook-and-loop fastener are fused at any part, the warp can be prevented from fraying and the rigidity can be reduced. In addition, FIG. 4 has point-like partial fusion parts 7 arranged in a zigzag pattern, which is excellent in texture because warp fraying is prevented and the area of the fusion parts is small.

The effect of preventing the fibers from being frayed from the cut surfaces at both ends is preferably a structure in which the fused portion is fused to the fibers at the cut surfaces at both ends. Since it does not proceed inside the fused portion, it has a practically sufficient anti-fraying effect. In the present invention, it is preferable to perform fraying prevention processing so that 1 to 30% of the area of both end portions becomes a fusion bonded portion.

The above-mentioned partially fused portion is obtained by fabricating a wide surface fastener in which a plurality of narrow engaging elements are erected in a strip shape, and a base cloth portion (middle ear) of the wide surface fastener having no engaging elements. ) May be continuously fused by using a heating embossing roller, an ultrasonic welder, or the like. The specific example is installed on the ultrasonic horn so that the back surface of the wide surface fastener is in contact with it, and a roller provided with a streak according to the shape of the partially fused portion is arranged at the middle ear part of the surface of the surface fastener, If the roller is passed through the surface fastener while rotating, the fibers of the base fabric are heated and softened by internal heating by ultrasonic vibration, and the fibers of the base fabric in a portion in contact with the streaks are fused by pressing the roller. . By changing the shape of the streaks on the roller surface, the desired shape of the partially fused portion can be given. Note that spots may be used instead of streaks. A conventional polyurethane resin or the like can be used for the adhesive layer for backing.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. Example 4 Four rows of hook-shaped engaging elements composed of 366 dtex nylon monofilaments were erected on a base cloth having a total width of 100 mm woven of 55 dtex nylon yarn at a weave density of 48 threads / inch, and the width of the middle ear was 5 mm. A wide hook-and-loop fastener was woven, and a polyurethane-based back coat agent was applied. This wide area fastener is 25KHz, 1.2KW
Of the ultrasonic horn and a line parallel to the surface (the height of the line from the roller surface is 0.2 mm, the length of the line is 5 mm, and the width is 0.1
mm) at intervals of 5 mm, the rollers were passed while pressing the middle ears and the ears at both ends of the wide surface fastener. After the fused portion was cooled, the center of the middle ear was cut with a rotary blade to obtain a narrow width surface fastener in which the widthwise ends were partially fused.

The narrow surface fastener was cut into a length of 25 cm, put into a test washing machine together with 1 kg of a polyester / cotton blended fabric, and washed continuously for 8 hours with detergent-containing room temperature water. Take out and observe the state of fraying of the warp at the end of the hook-and-loop fastener. The narrow width surface fastener having the width direction ends partially fused has 1 to 2 frays, whereas the width direction end of the surface fastener having no partial fusion portion has 7 to 8 lines. Warp fraying was observed.

[0018]

According to the present invention, it is possible to provide a surface fastener made of cloth which is excellent in durability with little fraying of the end base fabric fibers in the width direction of the surface fastener made of cloth and which has less rigidity and excellent texture. it can.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a surface fastener according to the present invention.

FIG. 2 is a plan view showing another example of the surface fastener according to the present invention.

FIG. 3 is a plan view showing another example of the surface fastener according to the present invention.

FIG. 4 is a plan view showing another example of the surface fastener according to the present invention.

[Explanation of symbols]

1: Base cloth, 2: Engagement element, 3, 3 ': End in width direction
4, 5, 6, 7: Partially fused part

Claims (1)

[Claims] 1. A cloth surface fastener comprising a central portion in which an engaging element is present and both ends in a width direction in which the engaging element is substantially absent. A hook-and-loop fastener made of cloth that prevents fraying.