WO2020153160A1

WO2020153160A1 - Fabric-based hook-and-loop fastener

Info

Publication number: WO2020153160A1
Application number: PCT/JP2020/000713
Authority: WO
Inventors: 卓相良
Original assignee: クラレファスニング株式会社
Priority date: 2019-01-23
Filing date: 2020-01-10
Publication date: 2020-07-30
Also published as: JP7299249B2; JPWO2020153160A1

Abstract

Provided is a fabric-based hook-and-loop fastener comprising: a woven base fabric composed of a warp, a weft, and a hook-like engaging element yarn; and a multiplicity of hook-like engaging elements present on the surface of the woven base fabric, wherein the warp is a false-twist yarn, the weft is a heat-fusible core-sheath-type multifilament yarn, the engaging element yarn is a monofilament having 200-400 dtex, the engaging element yarn is woven to three wefts in a floating and sinking manner and then floated over the woven base fabric, hook-like engaging elements are formed at floated positions, and the woven base fabric does not have a backcoat adhesive layer on the back side thereof. Even if a large tensile load is applied to the fabric-based hook-and-loop fastener in the shear direction when peeling off or being engaged, it is not likely to bring about an engageability decrease caused by fallen hook-like engaging elements and a fully extended hook shape that cannot be return to the original shape.

Description

Fabric hook hook fastener

The present invention relates to a woven hook hook fastener. The fabric hook hook-and-loop fastener is a plain woven fabric base fabric composed of warp yarns, weft yarns and engagement element yarns, and a large number of hook-shaped hooks formed of the engagement element yarns present on the surface of the fabric base fabric. Even if a large tensile load is applied in the shearing direction when the hook-shaped engaging element is applied during peeling or engagement, the hook-shaped engaging element does not fall down and the hook shape is fully extended. It can be avoided that the engaging ability is greatly reduced.

Conventionally, as a surface fastener having a woven fabric, a so-called woven hook hook fastener having a large number of hook-shaped engaging elements made of monofilament yarn on the surface of the woven fabric can be engaged with the hook-shaped engaging element. A combination with a so-called woven loop fastener having a large number of loop-shaped engaging elements made of multifilament yarn on the surface of a woven fabric is widely used. Also known is a so-called hook/loop mixed type woven surface fastener in which both the hook-shaped engaging elements and the loop-shaped engaging elements are present on the surface of the woven fabric.

In such a woven surface fastener, in order to prevent the engaging element thread woven into the woven base cloth from being pulled out from the woven base cloth due to pulling when releasing the engagement, the woven base cloth is usually A urethane-based or acrylic-based resin called a back coat adhesive is applied to the back surface.

In order to prevent the engaging element thread from being pulled out from the woven base cloth, a back coat adhesive is applied to the back surface of the woven base cloth, and the engaging element thread is applied to the entire woven base cloth by the adhesive. It is important to be fixed. However, since the entire backing adhesive hardens the backing adhesive, the force exerted on the engaging element cannot be distributed to the backing adhesive. In particular, in the field of application in which a large pulling force is applied to the engaging element in the shearing direction during peeling or during engagement, for example, in the field of shoes and medical supporters, the hook-shaped engaging element falls and the hook shape is It may not be fully extended to return to the original hook shape, and as a result, the engaging ability may be reduced.
In the present specification, the deformation of the hook-shaped engaging element in which the hook-shaped engaging element collapses or the hook shape opens due to such a large pulling force in the shearing direction, and as a result, the engaging ability is lost, is referred to in the present specification. This is called deterioration and deformation of the element.

A polyester yarn represented by polyethylene terephthalate is used as a warp yarn, a weft yarn, and a hook-shaped engaging element yarn, and a yarn made of a polyester heat-fusible fiber is used as a weft yarn to weave a hook surface fastener fabric, and then There is known a method of melting the heat-fusible fiber and fixing the root of the engaging element to the woven fabric (Patent Document 1).

In this method, since it is not necessary to apply the back coat adhesive, even when a large pulling force is applied to the engaging element in the shearing direction at the time of peeling or during engagement, deterioration of the engaging element is prevented. It can be reduced to some extent. However, since the hook-shaped engaging element is made of rigid polyethylene terephthalate, the degree to which deterioration of the engaging element can be reduced is low.

By using this method, the process of applying the back coat adhesive and drying is omitted, so the process can be simplified. In addition, since the entire woven base fabric is not solidified by the back coat adhesive, the surface fastener has excellent flexibility and does not impair the engaging ability even when used for a long period of time. Further, it can be dyed in the same color at the same time as the product made of polyester fiber which is most widely used in the fields of clothing and daily necessities. Therefore, after attaching the surface fastener to the product, the product and the surface fastener can be dyed at the same time. As a result, it is not necessary to prepare many surface fasteners dyed in various colors in advance, which is also advantageous in terms of inventory management.

When the heat-fusible fiber is used in this way, the deterioration and deformation of the engaging element can be somewhat reduced compared to the conventional technique of applying a back coat adhesive, but the engaging element yarn itself is a rigid polyethylene terephthalate. However, the degree of reduction is insufficient. In particular, when the engaging element is a hook-shaped engaging element, the hook-shaped engaging element falls down due to a strong pulling force, and the hook shape does not fully extend back to the original hook shape. It has a problem of deterioration and deformation that is impaired.

As an improvement of the above technique using such a polyethylene terephthalate-based hook-shaped engaging element and using a heat-fusible fiber, it is possible to use a monofilament yarn made of polybutylene terephthalate-based polyester as the hook-shaped engaging element yarn. It is known (Patent Document 2).

Compared with the hook-shaped engaging element thread made of polyethylene terephthalate-based monofilament thread described in Patent Literature 1, the engaging element thread of Patent Literature 2 is more flexible, and therefore the deterioration of the hook-shaped engaging element. The deformation could be reduced, but the degree of improvement was still insufficient.

International Publication No. 2005/122817 JP, 2005-43807, A

The present invention relates to further improving the techniques described in Patent Documents 1 and 2. That is, the present invention is such that, at the time of peeling or during engagement, even if a large tensile load in the shearing direction is applied to the hook-shaped engaging element, the hook-shaped engaging element falls down or the hook shape is fully extended. To provide a fabric hook hook-and-loop fastener that further reduces the problem that the engaging ability is lowered without returning to the state of the art, that is, a fabric hook hook fastener having hook-like engaging elements excellent in deterioration resistance deformation. The purpose is to provide. In particular, it is an object of the present invention to provide a woven hook hook fastener that is particularly suitable for fields of application such as shoes and medical supporters where a large tensile force is applied in the shearing direction.

The present invention provides the following fabric hook hook-and-loop fastener, and a medical supporter and shoes using the cloth hook hook fastener.
1. A plain weave fabric base fabric composed of warp yarns, weft yarns, and hook-shaped engaging element yarns, and a fabric hook including hook-shaped engaging elements consisting of a large number of the hook-shaped engaging element yarns present on the surface of the fabric base fabric. A hook-and-loop fastener,
The warp yarn, the weft yarn, and the hook-shaped engaging element yarn are each made of a polyester resin,
The hook-shaped engaging element yarn is woven into the woven base fabric in parallel with the warp yarn,
The fabric hook hook fastener satisfies the following conditions (1) to (5).
(1) The warp yarn is a false twisted yarn,
(2) The weft yarn is a multifilament yarn composed of a core-sheath type filament having a low melting point resin as a sheath component and a high melting point resin as a core component, and the root of the hook-shaped engaging element is fused to the low melting point resin, This means that it is fixed to the woven fabric,
(3) The hook-shaped engaging element thread is a monofilament thread of 200 to 400 dtex,
(4) The hook-shaped engaging element yarn floats up and down on the woven fabric base after the three wefts have floated up and down, and the hook-shaped engaging element is formed at the raised portion.
(5) The back coat adhesive layer does not exist on the back surface of the woven base fabric.

2. The woven hook hook fastener according to 1, wherein the breaking elongation of the woven hook hook fastener in the warp direction is 35 to 50%.

3. The woven hook hook fastener according to 1 or 2 above, wherein the hook-like engaging element thread is a monofilament thread made of polybutylene terephthalate polyester containing 0.2 to 8% by mass of polyester elastomer.

4. The woven hook hook-and-loop fastener according to any one of 1 to 3 above, wherein a false twist textured yarn used as a warp yarn is provided with a true twist of 50 to 200 t/m.

5. In the woven base fabric, the weft yarns are present in a straight line, and the warp yarns float up and down repeatedly with the weft yarns sandwiched therebetween, so that the warp yarns exist in a state of wrapping the weft yarns. Fabric hook hook fastener.

A medical supporter or shoe including the woven surface fastener of any one of 1 to 5 above.

In order to improve the deterioration resistance of the hook-shaped engaging element of the woven hook hook fastener, the pulling force applied to the hook-shaped engaging element is not limited to the hook-shaped engaging element alone, but is dispersed in the entire woven fabric base cloth. It is important to do so, and the present invention was made from that viewpoint.
In the present invention, a false twisted textured yarn is used as a warp that constitutes the woven fabric in order to disperse the tensile force over the entire woven fabric. By using an elastic false-twist textured yarn as the warp, the hook-and-loop fastener is made elastic, whereby the pulling force applied to the hook-shaped engaging element is dispersed in the woven base fabric. As a result, the deterioration deformation of the hook-shaped engaging element can be reduced as compared with the above-mentioned known technique, and the life of the surface fastener can be extended.

It is known to use false twisted textured yarn as part of the warp yarns of woven surface fasteners. For example, in Japanese Unexamined Patent Application Publication No. 2004-201821, a false twisting yarn is used as a part of the warp yarn of a surface fastener and a normal yarn is used as the remaining warp yarn, and the false twisting yarn floats on the back surface of the woven fabric base fabric. It is described that by woven in this way, a surface fastener having an excellent soft feeling on the back surface can be obtained. However, in the surface fastener described in this publication, the stretchability in the warp direction is controlled and suppressed by the normal yarn that does not have the stretchability, which is used in combination, so that the stretchability of the present invention is reduced. The purpose cannot be achieved.

In the present invention, the false twist textured yarn is used as the warp, but the effect of the present invention cannot be obtained even if the false twist textured yarn is used as the weft. In the present invention, the engaging element yarn is woven into the woven fabric in parallel with the warp yarn, so that the tensile force in the shearing direction applied to the engaging device is dispersed in the woven fabric fabric by the elastic false twisted yarn (warp yarn). To be done.

Since the hook-shaped engaging element yarn needs to retain the hook shape even in a pulled state, it is naturally necessary to use a flexible yarn having elasticity similar to that of false twisted yarn as the hook-shaped engaging element yarn. There is a limit. Therefore, even if an attempt is made to disperse the pulling force to the woven fabric by using the false twist textured yarn as the warp yarn, the stretchability of the woven fabric is low due to the difficult-to-extend engagement element yarns woven in the woven fabric. Therefore, the effect of using the false twist textured yarn is suppressed, and it is difficult to disperse the tensile force to the woven base fabric.
The present invention succeeds in dispersing the pulling force applied to the hook-shaped engaging element to the woven fabric by the method of weaving the thread for the hook-shaped engaging element. That is, in the present invention, after the three wefts are floated and set, the hook-shaped engaging element yarn is floated on the woven fabric and the hook-shaped engaging element is formed at that position.

In the conventional woven surface fastener, in order to adjust the density of the engaging elements, 1 to 7 wefts are floated and then the threads for the engaging elements are floated on the woven base fabric, and the engaging elements are formed at those locations. There is. In order to obtain a high density of engaging elements, a method of diving under one weft and forming an engaging element each time it floats is generally used. If you want to obtain a high engaging force with a low engaging element density, use thick engaging element threads, and lift up and down the engaging element threads on the woven fabric base after 5 to 7 weft threads are set aside. The method of forming the engagement element is commonly used.
In the present invention, the hook-shaped engaging element is floated on the woven fabric base after the three wefts are floated and set, and the engaging element is formed at that position. As a result, the pulling force in the shearing direction of the hook-shaped engaging element is dispersed in the woven base fabric by the elastic false-twisted yarn without being significantly disturbed by the hook-shaped engaging element yarn.

After floating more than three wefts, for example, after floating five wefts, the hook-shaped engaging element threads are floated on the woven fabric base, and hook-shaped engaging elements are formed at those locations. The effect of making the woven base fabric elastic is greatly suppressed by the hook-shaped engaging element thread. As a result, the pulling force applied to the hook-shaped engaging element cannot be dispersed in the woven fabric, and the object of the present invention cannot be achieved.
When the hook-shaped engaging element yarn is dipped under one weft thread, and then the engaging element is formed every time it floats on the woven fabric base cloth, the woven fabric base cloth of the hook-shaped engaging element is formed only by heat-sealing the weft yarns. Is insufficiently fixed, and the hook-shaped engaging element is pulled out by the pulling force applied to the hook-shaped engaging element.

In the present invention, the hook-shaped engaging element thread is a polyester monofilament thread of 200 to 400 dtex. When the thickness is 200 to 400 dtex, deterioration deformation of the engagement element is reduced, a high engagement force is obtained, and the engagement element of the engagement partner is not damaged.

In the present invention, the warp yarn, the weft yarn, and the hook engaging element yarn are all polyester yarns. This makes it possible to simultaneously satisfy the advantages of high engagement force, firm fixation of the engagement element by heat fusion, and dyeing.
In the present invention, the back coat adhesive layer is not present on the back surface of the woven base fabric. When the backcoat adhesive layer is present on the back surface, the backcoat adhesive layer hardens the woven fabric, so that it is meaningless to use the false twist textured yarn as the warp.

It is sectional drawing which shows typically the cross section parallel to the warp of an example of the textile hook hook fastener of this invention. 1 is a photomicrograph of a cross section of the woven fabric hook surface fastener of Example 1 parallel to the warp. It can be seen that the hook-shaped engaging element is not deteriorated and deformed. 5 is a micrograph of a cross section of the woven fabric hook surface fastener of Comparative Example 2 parallel to the warp yarns. It can be seen that the hook-shaped engaging element is deteriorated and deformed. It is a simplified diagram of an apparatus for measuring whether the hook-shaped engaging element is deteriorated or deformed.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram schematically showing a cross section of a fabric hook hook-and-loop fastener parallel to the warp yarn 2. The weft yarns 3 are linearly present in the woven fabric 1. The warp 2 wraps the weft 3 by repeatedly floating and sinking above and below the weft 3 so that the warp 2 sandwiches the weft 3. In the present invention, a false twist textured yarn is used as the warp yarn 2.

The hook-shaped engaging element yarn is woven into the woven base fabric in parallel with the warp yarn. As shown in FIG. 1, three wefts float up and down, then float up on the woven base fabric, form loops, and then dive under the wefts. By repeating this, many loops are formed on the woven fabric. The hook-shaped engaging element 4 is formed by cutting one leg of this loop.
The warp yarn 2 and the hook-shaped engaging element yarn are fixed to the weft yarn 3 by heat fusion. Since the fixing is fixed at a position in contact with the weft, it is largely different from the conventional surface fastener fixed by the adhesive layer back-coated on the entire back surface of the woven fabric 1.

In the present invention, the woven hook hook fastener is mainly formed of a monofilament thread for hook-shaped engaging elements, a warp thread and a weft thread.
The woven fabric hook surface fastener of the present invention also includes a hook/loop mixed type surface fastener in which the hook-shaped engaging element and the loop-shaped engaging element are mixed on the same surface of the woven fabric, and in this case, mainly the hook. It is formed from a monofilament thread for a linear engagement element, a multifilament thread for a loop-shaped engagement element, a warp thread and a weft thread.

As a warp, it is difficult to cause waviness (a state in which the woven base fabric surface of the surface fastener rises and falls irregularly and does not become a horizontal surface) due to heat, water absorption, and moisture absorption, and further improves heat fusion with the weft. From the point of view, a multifilament yarn substantially composed of polyethylene terephthalate polyester is preferable. More preferably, it is a multifilament yarn formed of polyethylene terephthalate homopolymer.

As the warp, a multifilament yarn having a total decitex of 20 to 54 filaments of 100 to 300 decitex is preferable, and a multifilament yarn of a total decitex of 24 to 48 filaments of 150 to 250 decitex is particularly preferable. ..

In the present invention, false-twisted multifilament yarns are used as warp yarns in order to impart stretchability in the warp direction of the woven base fabric. As the false-twisted multifilament yarn, a polyester false-twisted yarn having the above-mentioned thickness is used and is generally sold.
The false-twisted multifilament yarn imparts a twist to the yarn by rotating the spindle between rollers and rotates the spindle to fix the twist deformation by heating in a twisted state, and then untwist (untwist). The yarn obtained by doing so is bulky and has elasticity. Therefore, whether or not it is a false twist textured yarn can be easily determined by looking at the state of the yarn.

The degree of false twisting of the false twisted yarn used in the present invention is preferably such that an initial Young's modulus in the range of 20 to 35 g/dtex can be obtained. Considering that the initial Young's modulus of a normal polyethylene terephthalate-based multifilament yarn not subjected to false twisting is about 50 g/dtex, it can be seen that the false twisted yarn has extremely large stretchability.

It is preferable to use the polyester false twisted yarn after applying a real twist with a twist number of 50 to 200 t/m from the viewpoint of process passability when weaving a surface fastener. Within the above range, the stretchability of the polyester false twisted yarn is sufficient, and the effect of the present invention is easily obtained. Considering that the warp and weft of the conventional surface fastener are provided with a real twist of 500 t/m or more, the actual twist number of the polyester false twisted yarn used in the present invention is extremely small. I understand. In the present invention, it is preferable that all of the warp yarns other than the engaging element yarns are false twist textured yarns.

The weft used in the present invention is required to be a multi-filament yarn in which core-sheath type heat-fusible filaments having a heat-sealing sheath component are bundled. If the weft yarn is a heat-fusible multifilament yarn, it becomes possible to firmly fix the engaging element yarn to the woven fabric, and the engaging element yarn is woven from the woven fabric as in the conventional surface fastener. It is not necessary to apply a backcoat adhesive to the back of the woven fabric to prevent it from being pulled out. Therefore, the woven base fabric is not firmly fixed by the back coat adhesive, and the stretchability of the woven base fabric is not impaired. Further, there is no problem that the dyeability of the surface fastener is deteriorated due to the presence of the back coat adhesive layer, and the step of applying the back coat adhesive and drying it is unnecessary.

The core-sheath type heat-fusible multifilament yarn is composed of a polyester-based resin capable of firmly fixing the root of the engaging element yarn to the woven fabric by melting the sheath component at the heat treatment temperature. However, a multifilament yarn in which a plurality of core-sheath type polyester filaments made of a polyester resin that does not melt at the heat treatment temperature are bundled is preferable.

The core component is preferably polyethylene terephthalate. As the sheath component, a copolymerized polyethylene terephthalate having a significantly reduced melting point or softening point by copolymerizing a large amount of a copolymerization component such as isophthalic acid or adipic acid, for example, 20 to 30 mol% is used. preferable.
The melting point or softening point of the sheath component is 100 to 200° C., and the warp, the core component, the monofilament for hook-like engaging elements, and the multifilament yarn for loop-like engaging elements in the case of hook/loop mixed surface fasteners 20 to 150° C. lower than the melting point of
The cross-sectional shape of the core-sheath heat-fusible filament may be a concentric core sheath, an eccentric core sheath, a single core sheath, or a multi-core sheath.

It is preferable that all of the multifilament yarns used as the weft yarns are the above-mentioned heat-fusible multifilament yarns because the hook-like engaging element yarns are firmly fixed to the woven fabric. If the multifilament yarn used as the weft is not a core-sheath type and is formed of only the heat-fusible polymer, the heat-fusible polymer that has melted and solidified again is brittle and easily cracked, so sew a surface fastener In such a case, the woven base fabric is likely to be torn from the sewing thread portion. Therefore, the heat-fusible multifilament yarn preferably contains a resin that does not heat-melt as a core component. The mass ratio of the core component and the sheath component is preferably 50:50 to 80:20, particularly preferably 55:45 to 75:25.

The weft is preferably a multifilament yarn having a total decitex of 10 to 72 filaments of 80 to 300 decitex, and a multifilament yarn of 18 to 36 filaments having a total decitex of 90 to 200 decitex. It is particularly preferable that

Examples of the hook-shaped engaging element monofilament include a monofilament thread made of polyester having a high melting point, which does not melt or soften at a temperature at which the heat-fusible resin constituting the sheath component of the weft melts, and preferably deterioration resistance In terms of deformability, polybutylene terephthalate, and more preferably, a monofilament yarn made of polybutylene terephthalate blended with 0.2 to 8% by mass of a polyester elastomer in terms of obtaining more excellent deterioration deformation resistance.

Monofilaments made of polybutylene terephthalate blended with polyester elastomer are easily obtained by so-called mixed spinning, in which polyester elastomer chips are blended with polybutylene terephthalate chips during spinning.

Polybutylene terephthalate alone (that is, polyester elastomer is not blended) is obtained by blending 0.2 to 8% by mass of polyester elastomer, and in addition to improving deterioration deformation resistance, even when engagement/release is frequently repeated. Compared with a monofilament made of (polybutylene terephthalate), there is an advantage that fibrillation is less likely to occur. The term "blended with 0.2 to 8 mass% of polyester elastomer" means the value when the mass of the polybutylene terephthalate-based polyester is 100%. Of course, resins other than polybutylene terephthalate and polyester elastomer may be blended as long as they are small. Further, various stabilizers, colorants and the like may be added.

The polyester elastomer is a resin in which polyoxytetramethylene glycol is copolymerized with a resin having a butylene terephthalate unit as a main repeating unit. The proportion of [poly(oxytetramethylene)] terephthalate groups in the polyester elastomer is preferably 40 to 70% by mass, more preferably 50 to 60% by mass.

When the blending amount of the polyester elastomer is 0.2% by mass or more based on the polybutylene terephthalate polyester, the effect of blending the polyester elastomer can be obtained. When the blending amount is 8% by mass or less, the monofilament yarn does not become excessively soft, and high engagement strength can be obtained. The blending amount of the polyester elastomer is preferably 0.5 to 5% by mass, more preferably 1 to 3% by mass.

Polybutylene terephthalate, which is preferably used for monofilament yarns for hook-shaped engaging elements, is a resin obtained from terephthalic acid and butanediol, and other copolymerization components are copolymerized in small amounts within a range that does not impair the performance of polybutylene terephthalate. May be.

The thickness of the monofilament thread for hook-shaped engaging element is 200 to 400 dtex, which is excellent in deterioration resistance of the engaging element, and the loop-shaped engaging element of the mating partner is not cut. It is preferable because a sufficiently high engagement strength can be obtained.

As a multifilament yarn for loop-shaped engaging elements used in the production of hook/loop mixed type surface fasteners, polyester having a high melting point that does not melt or soften at the temperature at which the heat-fusible resin forming the sheath component of the weft melts A multifilament yarn made of polybutylene terephthalate is preferably used. A small amount of a resin other than polybutylene terephthalate may be blended. The loop-shaped engaging element yarn is preferably a multi-filament yarn in which 6 to 12, and preferably 6 to 9, monofilaments of 30 to 45 dtex are bundled.

In the case of manufacturing hook hook-and-loop fasteners, when manufacturing hook and loop mixed type hook-and-loop fasteners from the above-mentioned warp threads, weft threads and monofilament threads for hook-like engaging elements, the above-mentioned warp threads, weft threads, hook-like engagement A woven fabric for a surface fastener is woven from a monofilament yarn for elements and a multifilament yarn for loop-shaped engaging elements. As the woven structure of the woven fabric, there is used a monofilament thread for hook-shaped engaging elements, or a plain weave in which monofilament threads for hook-shaped engaging elements and multifilament threads for loop-shaped engaging elements are part of the warp.
The hook-shaped engaging element monofilament yarn is struck in parallel with the warp threads, rises from the woven fabric base surface on the way, and forms a hook-shaped engaging element loop while straddling a plurality of warp threads.

In the case of the hook/loop mixed type surface fastener, the hook-like engaging element monofilament yarn forms a hook-like engaging element loop in the same manner as described above, and the loop-like engaging element multifilament yarn and warp The loop-shaped engaging element loop is formed by being driven in parallel, rising from the woven fabric base surface on the way, and straddling one weft without straddling the warp.

The weaving density of the warp (including the thread for the engaging element) is preferably 50 to 90 yarns/cm after the heat treatment, and the weaving density of the weft is preferably 15 to 25 yarns/cm after the heat treatment. .. The amount of the weft used is preferably 10 to 45% by mass with respect to the total mass of the engaging element yarn, the warp yarn and the weft constituting the surface fastener.

The number of engaging element threads to be driven is preferably 3 to 6 for 20 warp threads (including engaging element threads), and 1 for 5 warp threads (including engaging element threads). Particularly preferred. It is preferable that the engaging element yarns are uniformly driven into the warp yarns without being biased. Therefore, it is preferable that the engaging element yarns be present on both sides of the four warp yarns that are continuous on average.

In particular, the hook-shaped engaging element yarn is preferably woven every four warp yarns into the woven fabric in parallel to the warp yarns. As shown in FIG. It is preferable to form the hook-shaped engaging element loop at the raised portion from the viewpoint of deterioration and deformation resistance as described above.

Specifically, the hook-shaped engaging element yarn floats on the weft yarn after floating and sinking three weft yarns, and then forms a loop while straddling 1 to 3 warp yarns and 1 weft yarn. After forming the loop, the hook-shaped engaging element yarn sinks between the weft yarns, floats and sinks three weft yarns again, and then floats on the weft yarn, forming a loop while straddling 1 to 3 warps and one weft yarn, Sink in between.

In the case of a hook/loop mixed type surface fastener, the hook-shaped engaging element thread forms a loop in the same manner as above. It is preferable that the loop-shaped engaging element yarn floats on the weft yarn after floating and sinking three weft yarns, and then forms a loop while straddling one weft yarn. After forming the loop, the loop-shaped engaging element yarn sinks between the weft yarns, floats and sinks three weft yarns again, and then floats on the weft yarn, and forms a loop while straddling one weft yarn and sinks between the weft yarns.

　The fabric for hook-and-loop fastener thus obtained is heat-treated to melt the sheath component of the core-sheath type heat-fusible multifilament yarn used as a weft. This eliminates the need for the back coat process that has been performed in the conventional surface fastener manufacturing.

The heat treatment temperature is a temperature at which the sheath component of the heat-fusible multifilament yarn melts or softens, but the yarns other than the weft yarn and the core component of the weft yarn do not melt, preferably 150 to 210°C, more preferably 185 to It is 205°C. The loop shape of the thread for hook-shaped engaging element is fixed by the heat during this heat treatment, and the hook shape of the hook-shaped engaging element obtained by cutting one leg of the loop is also retained. The loop shape of the loop-shaped engaging element is also fixed.

In this manner, a hook surface fastener woven fabric or a hook/loop mixed type surface fastener woven fabric having a large number of hook-shaped engaging element loops whose shapes are fixed can be obtained. Next, one leg of the loop for hook-shaped engaging element is cut to complete the hook-shaped engaging element.
Cutting of one leg is usually performed with a hair clipper or the like. When cutting one leg, it is preferable to cut a portion slightly lower from the top of the loop to the one leg side.

The density of the hook-like engaging elements of the hook surface fastener thus obtained (the number of hook-like engaging elements/the area of the surface of the woven fabric base where the hook-like engaging elements exist) is 25 to 125 pieces/cm ^2. Is preferred. The height of the hook-shaped engaging element is preferably 1.0 to 2.5 mm from the woven fabric base surface.

In the case of the hook/loop mixed surface fastener, the total number of monofilaments for hook-shaped engaging elements and multifilament threads for loop-shaped engaging elements is 20 warps (monofilaments for hook-shaped engaging elements and loop-shaped engaging elements). (Including multifilament yarn for use) is preferably 3 to 6. The ratio of the number of monofilaments for hook-shaped engaging elements to the number of multifilament threads for loop-shaped engaging elements is preferably 30:70 to 70:30. It is particularly preferable that the hook-shaped engaging elements arranged in two rows in the warp direction and the loop-shaped engaging elements arranged in two rows in the warp direction are alternately arranged in the weft direction on the surface of the woven fabric.

In the case of hook/loop mixed type surface fasteners, one leg side part of the loop for hook-shaped engaging elements protruding from the surface of the heat treated fastener fabric is cut to form hook-shaped engaging elements. The cutting position is the same as in the case of the hook surface fastener described above. The height of the hook-shaped engaging element is preferably 1.5 to 2.5 mm from the base cloth surface and is 0.3 to 0.8 mm lower than the height of the loop-shaped engaging element.

The density of each of the hook-shaped engaging elements and the loop-shaped engaging elements in the hook/loop mixed type surface fastener is 20 to 40 pieces/cm, based on the area of the surface of the woven fabric base where the engaging elements are present. ² , preferably 20 to 40 particles/cm ² . The ratio of the number of hook-shaped engaging elements to the number of loop-shaped engaging elements is preferably 40:60 to 60:40.

In the fabric hook hook fastener (including hook/loop mixed hook fastener) of the present invention, it is preferable that the breaking elongation in the warp direction is 35 to 50% in order to improve the deterioration resistance of the engaging element. .. When the breaking elongation in the warp direction is within the above range, the tensile force applied to the engaging element can be sufficiently dispersed in the woven fabric, and excellent deterioration deformation resistance can be obtained. In addition, the elasticity is moderate, and the engaging element exhibits a sufficient engaging force.

In order to achieve such a breaking elongation, as described above, a false twist textured yarn is used as a warp, and when three wefts are floated up and down, they are lifted up on the wefts and are re-sunk between the wefts, while being used for engaging elements. It is preferable that the hook-shaped engaging element yarn is woven so as to form a loop, and the heat-sealing core-sheath fiber is used as the weft yarn.
Further, the engagement element has the fact that the weft yarns are present in a straight line in the woven fabric base, and the warp yarns are present above and below the weft yarns by sandwiching the weft yarns so as to wrap around the weft yarns. It is more preferable because the tensile force can be dispersed in the warp direction of the woven fabric.
The breaking strength of the woven hook surface fastener in the warp direction is preferably 300 to 500 N/cm.

The woven hook hook fastener of the present invention can be used in fields of application where conventional general hook hook fasteners are used. In particular, it is suitable for applications where engagement/release is frequently repeated and high tensile force is applied. For example, in addition to shoes, gloves, etc., medical supporters, artificial limb fixing materials, binding bands for packing, binding tape, etc. It can be used in a wide range of fields such as fixing materials for civil engineering construction sheets. In particular, applications where the skin of the human body is directly contacted, engagement/release is frequently performed, and a hook-shaped engaging element is subjected to high tensile force, for example, shoes, medical supporters, fixing materials for artificial limbs. Suitable for etc.

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to the following examples.
In the following examples and comparative examples, the initial engagement strength was measured according to the method of JIS L3416, and the peeling durability (engagement strength after 5000 times of engagement/peeling was repeated) was also measured according to JIS L3416.
The breaking strength and the breaking elongation were measured according to the method of JIS L1096 A method.

In order to determine suitability as a medical supporter application, a load bearing test was performed, and the shape of the hook-shaped engaging element at that time was observed with a microscope.
The load bearing test was performed as follows.
As shown in FIG. 4, one end of a hook surface fastener 6 having a width of 25 mm and one end of a loop surface fastener 5 having a width of 25 mm described below were engaged with each other. The engaging portion 8 had a width of 25 mm and a length of 30 mm. The other end of the hook surface fastener 6 and the other end of the loop surface fastener 5 were fixed to the upper part of the test device, respectively. The cylinder 7 having a diameter of 60 mm was inserted so that the engaging portion 8 was in contact with the lower portion of the cylinder 7.
The cylinder 7 was raised and lowered in the direction of the arrow shown in FIG. 4, and the state in which the specific load was applied in the shearing direction of the engaging portion 8 and the state in which it was not applied were repeated. This operation was repeated up to 10,000 times with increasing load (loading speed and relaxation speed were 300 mm/min).
The load (maximum load) when the above-described operation could not be repeated up to 10,000 times was determined because the hook-shaped engaging element deteriorated and deformed and the engaging force was impaired.
Load started from 3.0N / cm ^2, if it can be repeated up to 10,000 times, instead of the new hook surface fastener and loop fastener, 4.0N ^/ cm 2 a load, 5.0N / cm ² · ... and sequentially increasing in 1.0N / cm ² units, it continued the operation until it can not be repeated up to 10,000 times.
The state of the hook-shaped engaging element of the hook surface fastener when the above operation could not be repeated up to 10,000 times was observed with a microscope.
A woven loop fastener (brand name: B2790Y) manufactured by Kuraray Fastening Co., Ltd. having a loop engaging element density of 40/cm ² was used as the loop fastener.

Example 1
The following yarns were used as the warp yarns, the weft yarns, and the monofilament yarns for hook-shaped engaging elements, which constitute the woven fabric base fabric of the woven fabric hook surface fastener.

[Warp]
False twisted yarn of multifilament yarn made of polyethylene terephthalate having a melting point of 260° C. Initial Young's modulus: 27.5 g/dtex
Real twist number: 100t/m
Total decitex: 167dtex
Number of filaments: 48

[Weft]
Multifilament yarn consisting of core-sheath type filament Core component: polyethylene terephthalate (melting point: 260°C)
Sheath component: isophthalic acid 25 mol% copolymerized polyethylene terephthalate (softening point: 190°C)
Core-sheath ratio (mass ratio): 70:30
Total decitex: 99dtex
Number of filaments: 24

[Monofilament thread for hook-shaped engaging elements]
Polybutylene terephthalate monofilament (melting point: 223°C)
At the time of spinning, 2% by mass of a polyester elastomer (polyester elastomer “Hytrel 7247” manufactured by Toray Industries, Inc.) was blended.
Fineness: 330 dtex (diameter: 0.18 mm)

[Manufacture of woven hook hook fasteners]
The warp, the weft, and the monofilament yarn for hook-shaped engaging elements are woven so that the woven density after heat treatment is 60 warps/cm (including the monofilament yarn for hook-shaped engaging elements) and 20 wefts/cm. A plain weave fabric was obtained.
The hook-like engaging element monofilament yarn is driven parallel to the warp yarn at a ratio of one to four warp yarns (not including the hook-like engaging element monofilament yarn), and the three weft yarns are floated up and down and then lifted onto the weft yarns. , 1 weft and 3 warps are straddled to form a loop, and after forming the loop, 3 wefts are floated again and then lifted onto the weft, and 3 warps and 1 weft are straddled to form a loop. It was formed and woven so that it would sink again under the weft.

The plain woven fabric woven by the above method was heat-treated at a temperature (200° C.) in which only the sheath component of the weft was heat-melted and the warp, the monofilament yarn for hook-shaped engaging element, and the core component of the weft were not heat-melted. As a result, the yarn crossing the weft was fused and fixed by the melted sheath component. Next, one leg of the loop for hook-shaped engaging element was cut at a portion having a height of 4/5 from the bottom, and the loop was used as a hook-shaped engaging element to obtain a woven hook hook fastener. The density of hook-shaped engaging elements of the obtained fabric hook hook fastener was 60/cm ² , and the height of the hook-shaped engaging elements from the woven fabric base surface was 1.8 mm.

The breaking elongation of the obtained woven hook hook fastener in the warp direction was 36.5%, and the breaking strength in the warp direction was 314 N/cm. When the cross-sectional shape of this hook surface fastener is observed with a microscope, as shown in FIG. 1, the weft yarns are present linearly in the woven fabric, the warp yarns sandwich the weft yarns, and the warp yarns repeatedly float up and down. As a result, it was observed that the warp yarns existed in a state of enclosing the weft yarns.

The initial engagement strength of the obtained woven hook hook fastener and the engagement strength after 5000 times of engagement/release were repeated were measured. Furthermore, the state of the multifilament yarn constituting the loop-shaped engaging element of the engaging partner after repeating the engaging/disengaging 5000 times was observed.
Further performing the above load resistance test, the state of the hook-shaped engaging element when the maximum load and the maximum load are shown, that is, whether the initial shape is maintained, the hook shape is open, or the hook-shaped engaging element is The state of falling or the like was observed.
The results are shown in Table 1 below.

As is clear from the results in Table 1, the woven fabric hook surface fastener of Example 1 is excellent in initial engagement strength, engagement strength after repeating 5000 times of engagement/release, and 5000 times of engagement/release. It can be seen that the state of the multifilament yarn constituting the loop-shaped engagement element of the engagement partner at the time of repeating is also extremely excellent.
The load-bearing test results are also excellent, and as is clear from the micrograph after the load-bearing test shown in FIG. 2, most of the hook-like engaging elements that are tilted or tilted, and the hook-like engaging elements with the hook shape opened are almost the same. There wasn't.
Therefore, it is understood that the woven loop fastener according to the present embodiment is suitable for applications such as medical supporters and shoes, in which attachment and detachment are repeated many times and a large load is applied in the engaged state.

Comparative Example 1
In Example 1, the polyethylene terephthalate false twisted yarn used for the warp was replaced with the polyethylene terephthalate multifilament yarn not subjected to false twisting (initial Young's modulus: 57.7 g/dtex, actual twist: A woven fabric hook surface fastener was manufactured under the same conditions as in Example 1 except for changing to 602 t/m), and the same test as in Example 1 was carried out. The breaking elongation of the obtained fabric hook hook fastener was 29.0%.

As is clear from the results in Table 1, the woven fabric hook surface fastener of Comparative Example 1 was excellent in initial engagement strength, engagement strength after repeating 5000 times of engagement/release, and 5000 times of engagement/release. It can be seen that the state of the multifilament yarn forming the loop-shaped engaging element at the time point when the above is repeated is excellent.
However, the maximum load in the load bearing test was lower than that in Example 1. As a result of observing the hook-shaped engaging element after the load bearing test, the hook-shaped engaging element fell and the hook shape was opened. It is possible to repeat the attachment and detachment many times, but it is understood that it is not suitable for applications in which a large load is applied in the engaged state.

The difference between Example 1 and Comparative Example 1 is whether or not the warp is a false twist textured yarn.
Since the warp yarn of Example 1 is a false twisted yarn, even if a load is applied in the shearing direction in the engaged state, a large load is not applied to the hook-shaped engaging element itself, and the woven fabric has elasticity and It is expected that the load is distributed on the base fabric, which is the reason for obtaining the excellent results.
On the other hand, in the hook surface fastener of Comparative Example 1, since the woven base fabric does not have elasticity, it is difficult to disperse the load on the woven base fabric, and it is expected that the load will concentrate on the hook-shaped engaging element itself. The maximum load was an acceptable value, but the hook-shaped engaging element fell and the hook shape was open.

Comparative example 2
In Example 1, the monofilament yarn for hook-shaped engaging elements floats and sinks 5 wefts, then forms a loop while straddling 1 weft and 3 warps, and after forming a loop, the monofilament yarn is 5 wefts again. Was lifted up and down, and then floated up onto the weft, forming a loop while straddling three warps and one weft, and sinking again under the weft to manufacture a woven hook hook fastener in the same manner as in Example 1, The same test as in Example 1 was carried out.
The density of hook-shaped engaging elements of the obtained fabric hook surface fastener was 40/cm ² .
A photomicrograph of a cross section of the woven hook hook fastener parallel to the warp obtained after the load bearing test is shown in FIG.

As is clear from the results in Table 1, the hook surface fastener of Comparative Example 2 has excellent initial engaging strength, and after engaging and disengaging 5000 times, the engaging strength is further increased, and further engaging and disengaging 5000 times. It can be seen that the state of the multifilament yarn forming the loop-shaped engaging element at that time is excellent.
However, the maximum load in the load bearing test was lower than that in Example 1. As is apparent from FIG. 3, the hook-shaped engaging element fell and the hook shape was open.
From these results, it is understood that the fabric hook hook-and-loop fastener of Comparative Example 2 can be used for applications in which attachment and detachment are repeated many times, but is not suitable for applications in which a large load is applied in the engaged state.

The difference between Example 1 and Comparative Example 2 is the number of weft yarns in which the engaging element yarn floats and sinks before forming the engaging element loop.
In Comparative Example 2, the hook-shaped engaging element yarn floats and sinks five weft yarns. As a result, the elasticity of the woven fabric is impaired by the threads for the woven fabric woven into the woven fabric, so that the load applied to the woven fabric is not sufficiently dispersed in the woven fabric and the hook-shaped engagement element is not formed. The load is concentrated on and the maximum load is low. As shown in FIG. 3, a hook-shaped engaging element that fell down and a hook-shaped engaging element that opened the hook shape were observed.

Comparative Example 3
In Example 1, the monofilament yarn for hook-shaped engaging elements sinks one weft, and then forms a loop while straddling one weft and three warps, and after loop formation, the monofilament yarn again forms one weft. Was sunk, then a loop was formed while straddling three warps and one weft, and a loop was formed so as to sink again under the weft, and a fabric hook hook fastener was manufactured in the same manner as in Example 1.
The density of hook-shaped engaging elements of the obtained fabric hook surface fastener was 120/cm ² .

In the fabric-based hook surface fastener of Comparative Example 3, the number of weft threads in which the hook-shaped engaging element yarn floats and sinks was small, and the fixing force of the hook-shaped engaging element to the woven fabric was low. The tests of Example 1 were not performed because they could not be used repeatedly.

Examples 2-3
In Example 1, except that the thickness of the polyester elastomer-containing polybutylene terephthalate monofilament thread used as the thread for the hook-shaped engaging element was changed to 250 decitex (Example 2) or 370 decitex (Example 3). A woven hook hook fastener was manufactured in the same manner as in Example 1, and the same test as in Example 1 was performed.
The breaking elongations in the warp direction of the fabric hook hook-and-loop fasteners of Examples 2 and 3 were 36.1% and 37.2%, respectively, and the breaking strengths in the warp direction were 308 N/cm and 320 N/cm, respectively. Met.
When the cross section of the hook surface fasteners of Examples 2 and 3 in the warp direction was observed with a microscope, the weft existed linearly in the woven fabric, and the warp was repeatedly floated up and down by sandwiching the weft. It was observed that the warp existed in the state of enclosing the weft.

As is clear from the results in Table 1, the hook surface fastener of Example 2 was excellent in initial engagement strength, and after engaging and releasing 5000 times repeatedly, engaging strength, and further repeating 5000 engaging/peeling. It can be seen that it is excellent in the state of the multifilament forming the loop-shaped engaging element at that time. Further, the maximum load in the load bearing test is lower than that in Example 1, but the hook surface fastener after the load bearing test has few hook-shaped engaging elements that fall down and hook-shaped engaging elements that open the hook shape. It was
Therefore, it can be seen that it is suitable for applications such as a medical supporter and shoes that are repeatedly attached and detached many times and in which a large load is applied in the engaged state.

The hook surface fastener of Example 3 was excellent in initial engaging strength, and was excellent in engaging strength after repeating 5000 times of engaging/disengaging, but it was in a loop shape at the time of repeating 5000 engaging/disengaging. The multifilament forming the engaging element had little effect on the engaging strength, but was slightly cut. The maximum load in the load bearing test was high, and the hook surface fastener after the load bearing test had few hook-shaped engaging elements that fell down and hook-shaped engaging elements that opened the hook shape.
Therefore, it can be seen that it is suitable for applications such as a medical supporter and shoes that are repeatedly attached and detached many times and in which a large load is applied in the engaged state.

Comparative Examples 4-5
In Example 1, except that the thickness of the polyester-based elastomer-containing polybutylene terephthalate monofilament thread used as the thread for the hook-shaped engaging element was changed to 100 decitex (Comparative Example 4) or 450 decitex (Comparative Example 5). A woven hook hook fastener was manufactured in the same manner as in Example 1, and the same test as in Example 1 was performed.

As is clear from the results of Table 1, the hook surface fastener of Comparative Example 4 has a very weak initial engagement strength, and disengages in applications where a large load is applied in an engaged state such as a medical supporter. There is a possibility that it is not suitable for such an application. Although the engaging area can be increased to reduce the load per unit area, a large engaging area is required, the application is limited, and the designability is impaired, so that it is not suitable for practical use.

The hook surface fastener of Comparative Example 5 was very strong in initial engagement strength, and when the engagement/release was repeated 5000 times, the monofilament in the multifilament forming the loop-shaped engagement element was cut, and It is not suitable for the use of the period. A delicate surface fastener such as a thinner monofilament surface fastener or a tricot knitted fabric may be used as an engagement partner. In the case of such a mating partner, if the initial engaging strength is too strong, the loop-shaped engaging element on the loop surface fastener side becomes fluffy and the monofilament is cut in the application where the desorption is repeated many times like a medical supporter. Therefore, it is not suitable for practical use.

Comparative Example 6
In order to prevent the hook-like engaging element from being pulled out from the woven fabric, a polyurethane resin solution for a back coat adhesive was applied to the back surface of the hook surface fastener obtained in Comparative Example 3 at a solid content of 30 g/m ^2. Was applied and dried to manufacture a woven hook hook fastener with a back coat layer, and the same test as in Example 1 was carried out.

The resulting fabric hook hook-and-loop fastener with a back coat layer has the entire fabric base fabric fixed by the back coat adhesive, so that the fabric base fabric is It lacked flexibility and lost the advantages of woven fabric. Further, since the back coat resin layer is present, it is expected that the surface fastener has poor dyeability.

As is clear from the results in Table 1, the hook surface fastener of Comparative Example 6 had an initial engaging strength, an engaging strength after repeating 5000 times of engagement/release, and a point of time after repeating 5000 times of engagement/release. It can be seen that it is excellent in any of the states of the multifilament yarn that constitutes the loop-shaped engaging element. However, the maximum load in the load bearing test was lower than that in Example 1, and the hook surface fasteners after the load bearing test had many hook-shaped engaging elements that fell and hook-shaped engaging elements that opened the hook shape.
From the above results, it can be seen that the hook surface fastener of Comparative Example 6 can be used for applications in which attachment/detachment is repeated many times, but is not suitable for applications in which a large load is applied in the engaged state.

State of loop-shaped engaging element after 5000 times of engagement/disengagement A: Little damage B: Slightly damaged C: State of hook-shaped engaging element in load test with severe damage A: Fallen hook and opened There are few hooks B: A few hooks that have fallen and some that have opened C: There are many hooks that have fallen and the hook shape opens significantly

1: Fabric base 2: Warp 3: Weft 4: Hook-shaped engaging element 5: Loop surface fastener 6: Hook surface fastener 7: Cylinder 8: Engagement part

Claims

A plain weave fabric base fabric composed of warp yarns, weft yarns, and hook-shaped engaging element yarns, and a fabric hook including hook-shaped engaging elements consisting of a large number of the hook-shaped engaging element yarns present on the surface of the fabric base fabric. A hook-and-loop fastener,
The warp yarn, the weft yarn, and the hook-shaped engaging element yarn are each made of a polyester resin,
The hook-shaped engaging element yarn is woven into the woven base fabric in parallel with the warp yarn,
The fabric hook hook fastener satisfies the following conditions (1) to (5).
(1) The warp yarn is a false twisted yarn,
(2) The weft yarn is a multifilament yarn composed of a core-sheath type filament having a low melting point resin as a sheath component and a high melting point resin as a core component, and the root of the hook-shaped engaging element is fused to the low melting point resin, It is fixed to the woven base fabric by this,
(3) The hook-shaped engaging element thread is a monofilament thread of 200 to 400 dtex,
(4) The hook-shaped engaging element yarn floats up and down on the woven fabric base after the three wefts have floated up and down, and the hook-shaped engaging element is formed at the raised portion.
(5) The back coat adhesive layer does not exist on the back surface of the woven base fabric.
The woven hook hook-and-loop fastener according to claim 1, wherein the breaking elongation of the woven hook hook fastener in the warp direction is 35 to 50%.
The woven hook hook fastener according to claim 1 or 2, wherein the thread for the engagement element is a monofilament thread made of polybutylene terephthalate polyester containing 0.2 to 8% by mass of polyester elastomer.
The woven hook hook fastener according to any one of claims 1 to 3, wherein a false twist textured yarn constituting the warp yarn is provided with a real twist of 50 to 200 t/m.
5. The weft yarn is linearly present in the woven base fabric, and the warp yarn is present in a state of wrapping the weft yarn by repeatedly floating up and down with the weft yarn interposed therebetween. The fabric hook hook fastener described in.
A medical supporter including the fabric hook hook fastener according to any one of claims 1 to 5.
A shoe including the woven hook hook fastener according to any one of claims 1 to 5.