Polyethylene terephthalate-based fabric hook-and-loop fastener and method for manufacturing same

Abstract

Provided is a hook-and-loop fastener woven from polyethylene terephthalate-based threads. A resin layer (6) composed of a polyethylene terephthalate-based resin having a melting point of 160-210 °C copolymerized with isophthalic acid is directly overlaid on a second face of a base fabric (5) which is a woven fabric obtained by using threads composed of a polyethylene terephthalate-based resin as a warp (2), a weft (3), and an engaging element thread (3).

Description

Polyethylene terephthalate fabric hook-and-loop fastener and its manufacturing method Related Applications

[0001] This application claims priority from Japanese Patent Application No. 2022-200317, filed on December 15, 2022, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a hook-and-loop fastener woven from polyethylene terephthalate (hereinafter sometimes abbreviated as PET) based yarns.

[0003] Conventionally, as a hook-and-loop fastener having a woven base fabric, a combination of a so-called woven hook fastener, which has a large number of hook-shaped engaging elements made of monofilament yarn on the surface of the woven base fabric, and a so-called woven loop fastener, which has a large number of loop-shaped engaging elements made of multifilament yarn on the surface of the woven base fabric that can engage with the hook-shaped engaging elements, has been widely used in fields such as clothing and daily necessities, because there is little damage to the engaging elements and little decrease in engaging force even when engaging and peeling are repeated.

[0004] In addition, so-called hook-and-loop coexisting woven surface fasteners, in which both the above-mentioned hook-shaped engaging elements and loop-shaped engaging elements are present in large numbers on the same surface of a woven base fabric, are also widely used because they can combine the functions of both hook and loop surface fasteners in a single type of surface fastener, eliminating the need to use both hook and loop surface fasteners in combination as with conventional surface fasteners.

[0005] Such woven surface fasteners are woven from warp threads, weft threads, and engaging element threads. Nylon-based threads are typically used for these warp threads, weft threads, and engaging element threads due to their excellent flexibility, resulting in a soft, supple feel to the touch. In the case of woven surface fasteners, the engaging elements are pulled from the base fabric surface each time the fastener is repeatedly engaged and disengaged. To prevent the engaging elements from being pulled out of the base fabric due to this pulling, a method known as a back coat is used in which a solution or dispersion of polyurethane or polyacrylic resin is applied and dried on the back surface of the base fabric (i.e., the surface opposite to the front surface on which the engaging elements are present), thereby adhering and fixing the engaging element threads to the base fabric. For example, Patent Document 1 describes using nylon-based threads as the warp threads, weft threads, and engaging element threads, and then applying and drying a polyurethane-based back coat resin liquid to the back surface of the resulting woven surface fastener fabric.

[0006] In recent years, PET fibers have been widely and generally used in the field of textile products such as clothing, footwear, gloves, and daily necessities, and a so-called recycling system has become widespread in which textile products made of these PET fibers are collected, remelted, spun into fibers, and reused as textile products. Also, a system is becoming widespread in which used PET bottles are collected, melted, spun into fibers, and reused as textile products.

[0007] Furthermore, in order to recycle hook-and-loop fasteners used as fasteners for these PET-based textile products, they must be submitted to the recycling system together with the textile product without being removed from the textile product. However, in the case of conventional woven hook-and-loop fasteners, the thread used is nylon-based thread and the back coat layer applied to the back surface is made of polyurethane-based or polyacrylic resin, so they cannot be used in the recycling system for PET-based textile products.

[0008] As a PET-based woven hook-and-loop fastener that can replace such nylon-based woven hook-and-loop fasteners that cannot be recycled into the recycling system, Patent Document 2 describes a PET-based woven hook-and-loop fastener that uses PET-based yarns for both the warp and engaging element yarns, and further uses heat-fusible PET-based yarns as the weft yarns, and fuses the heat-fusible PET-based yarns used as the weft yarns to fix the engaging element yarns to the base fabric, thereby imparting pull-out resistance to the engaging elements.

[0009] Indeed, the PET-based woven hook-and-loop fastener described in Patent Document 2 is made up of PET-based threads, and furthermore, instead of a polyurethane or polyacrylic back coat resin applied to the back surface of the base fabric, a PET-based heat-fusible thread is used as the weft thread. Therefore, no back coat resin is required, and no substances that would prevent the fastener from being sent to the recycling system are present. Therefore, the woven hook-and-loop fastener attached to the PET-based textile product can be sent to the recycling system in its attached state without being peeled off.

[0010] However, in the case of the technology described in Patent Document 2, in which a heat-fusible yarn is used for the weft yarn and this heat-fusible yarn is melted to obtain pull-out resistance for the engaging elements, the heat-fusible yarn present in the middle part of the base fabric melts, so the entire base fabric from the front side to the back side is fixed by the heat-fusible yarn, which makes the entire base fabric hard and the feel of the hook-and-loop fastener surface hard, so it is not necessarily suitable for applications requiring a soft feel, such as clothing, gloves, footwear, etc. Furthermore, PET-based yarns are stiffer than nylon-based yarns, which further makes the feel of the hook-and-loop fastener surface harder.

[0011] Patent Document 3 describes a hook-and-loop fastener in which a synthetic resin sheet material is welded and integrated onto the backside of a woven or knitted hook-and-loop fastener, and that the synthetic resin that forms this hook-and-loop fastener can be nylon resin, as well as polyester resin or polypropylene resin. It also describes that the synthetic fibers that form the hook-and-loop fastener and the sheet material welded and integrated onto the backside are preferably formed from the same synthetic resin because this allows for a strong integration. It also describes that the melting point of the synthetic fibers that form the hook-and-loop fastener can be higher, equal to, or lower than the melting point of the sheet material welded onto the backside. It also describes that the hook-and-loop fastener obtained in this way has a strength and rigidity such that the resin of the sheet material flows into the gaps between the weave of the base fabric and also flows out to the surface, so that the base fabric and the sheet material do not easily peel apart during use. It also describes that the resulting hook-and-loop fastener is suitable as an industrial material used in tunnel construction and the like, taking advantage of its strength and rigidity.

[0012] However, as described in the examples of the hook-and-loop fastener described in Patent Document 3, when a sheet material is welded to the back surface of the hook-and-loop fastener, the molten resin of the sheet material flows into the weave of the hook-and-loop fastener, penetrates the weave, and flows out to the surface, so the resulting hook-and-loop fastener has rigidity as described above, in other words, the entire base fabric of the hook-and-loop fastener is fixed by the resin, giving it a strong resin sheet feel, and the flexibility of the woven hook-and-loop fastener and the soft feel of the hook-and-loop fastener surface are lost.

[0013] Incidentally, Patent Document 4 describes a hook-and-loop fastener in which a low-melting polyester-based hot-melt resin layer is integrated onto the back surface of the PET-based hook-and-loop fastener described in Patent Document 2, thereby enabling heat-sealing with an iron or the like as a means of attaching the hook-and-loop fastener to an object. However, the hook-and-loop fastener described in Patent Document 4 uses heat-sealable threads as the weft threads, just like the technology in Patent Document 2, and therefore the entire base fabric from the front side to the back side is still fixed by the heat-sealable weft threads. Furthermore, since the warp threads and threads for the engaging elements used are PET-based threads, it cannot solve the problem of the surface of the hook-and-loop fastener feeling hard to the touch, just like the technology in Patent Document 1.

[0014] JP 2003-299508 A, WO 2005 / 122817 A, JP 2000-17311 A, WO 2020 / 149361 A

[0015] The first object of the present invention is to provide a woven hook-and-loop fastener that is woven from PET-based yarns and, despite being made from a rigid PET-based resin, can prevent the entire base fabric from becoming hard by combining it with a specific PET-based binder resin, has excellent engaging force, and can be recycled after use, especially while attached to a PET-based textile product.The second object of the present invention is to provide a woven hook-and-loop fastener that, in addition to the first object, has a soft and gentle feel on the surface of the engaging elements of the woven hook-and-loop fastener, allows recycled yarns to be used as the threads constituting the hook-and-loop fastener, and when the hook-and-loop fastener is dyed with a disperse dye, there is almost no difference in dyeing between the base fabric portion of the hook-and-loop fastener and the resin layer integrated on the back side, so that the impression of a different color being integrated on the back side is not given, and can be simultaneously dyed to approximately the same color as the textile product when the hook-and-loop fastener is attached to the textile product.

[0016] That is, the present invention can be configured in the following modes. [Mode 1] A woven fabric surface fastener having a base fabric woven with warp yarns, weft yarns, and engaging element yarns, a first surface of the base fabric being the front side and a second surface being the back side, the engaging element yarns being woven into the base fabric parallel to the warp yarns, a large number of hook-shaped and / or loop-shaped engaging elements formed from the engaging element yarns and rising from the first surface of the base fabric, and the warp yarns, weft yarns, and engaging element yarns all being threads made of polyethylene terephthalate-based resin, has the following modes 1) and 2): 1) a binder layer made of polyethylene terephthalate-based resin copolymerized with isophthalic acid and having a melting point of 160 to 210°C (preferably 170 to 205°C) is provided on the second surface of the base fabric, and the engaging element yarns are directly bonded and fixed by the resin of the binder layer, and 2) no resin of the binder layer is present on the first surface of the base fabric. A polyethylene terephthalate-based woven fabric surface fastener that satisfies all of the above. [Aspect 2] A woven fabric woven with warp yarns, weft yarns, and threads for engaging elements is used as a base fabric, a first surface of the base fabric is the front side and a second surface is the back side, the threads for engaging elements are woven into the base fabric parallel to the warp yarns, and a large number of hook-shaped and / or loop-shaped engaging elements formed from the threads for engaging elements and rising from the first surface of the base fabric are present on the first surface of the base fabric, and the warp yarns, weft yarns, and threads for engaging elements are all constituted by threads made of polyethylene terephthalate-based resin, and the woven fabric surface fastener satisfies the following configurations 1) and 2): 1) a binder layer made of a polyethylene terephthalate resin copolymerized with isophthalic acid and having a melting point of 160 to 210°C (preferably 170 to 205°C) is provided on the second surface of the base fabric, a part of the resin of the binder layer penetrates into the interior of the base fabric, and the engaging element threads are bonded over almost the entire area of ​​the second surface of the base fabric where they slip under the weft yarns by the resin constituting the binder layer; and 2) the warp yarns and the engaging element threads are not bonded to the weft yarns at areas where they cross over the weft yarns on the first surface of the base fabric.[Aspect 3] The polyethylene terephthalate-based woven surface fastener according to Aspect 1 or 2, wherein at least one of the warp and weft threads is a thread made of a polyethylene terephthalate-based resin copolymerized with isophthalic acid and having a melting point of 250 to 257° C. [Aspect 4] The polyethylene terephthalate-based woven surface fastener according to any one of Aspects 1 to 3, wherein the engaging element threads are a thread made of a polyethylene terephthalate-based resin copolymerized with isophthalic acid and having a melting point of 250 to 265° C. (preferably 250 to 257° C.). [Aspect 5] The polyethylene terephthalate-based woven surface fastener according to any one of Aspects 1 to 4, wherein the warp, weft, and engaging element threads are all made of a copolymerized polyethylene terephthalate resin containing, as copolymerization components, 1.0 to 2.0 mol % of isophthalic acid based on the total amount of dicarboxylic acids and 2.0 to 3.5 mol % of diethylene glycol based on the total amount of diols. [Aspect 6] The polyethylene terephthalate-based woven fabric surface fastener according to any one of Aspects 1 to 5, wherein the binder layer bonded to the second surface of the base fabric has a large number of holes penetrating the layer in the thickness direction. [Aspect 7] A textile product with a polyethylene terephthalate-based woven fabric surface fastener, wherein the polyethylene terephthalate-based woven fabric surface fastener according to any one of Aspects 3 to 5 is attached to a textile product made of a polyethylene terephthalate-based resin and dyed the same color as the textile product with the same disperse dye.[Aspect 8] A method for producing a woven fabric surface fastener using a base fabric made of a woven fabric composed of warp yarns made of a polyethylene terephthalate resin copolymerized with isophthalic acid and weft yarns and yarns for engaging elements made of a polyethylene terephthalate resin, a first surface of the base fabric being the front side and a second surface being the back side, the yarns for engaging elements being woven into the base fabric parallel to the warp yarns, a large number of hook-shaped and / or loop-shaped engaging elements formed from the yarns for engaging elements and rising from the surface of the base fabric are present on the first surface of the base fabric, and a binder layer made of a polyethylene terephthalate resin copolymerized with isophthalic acid and having a melting point of 160 to 210°C (preferably 170 to 205°C) is provided on the second surface of the base fabric, characterized in that the following steps A, B, and C are carried out in this order: [Step A] When weaving a fabric from warp and weft threads, the threads for engaging elements are woven parallel to the warp threads, and at the same time, the threads for engaging elements are made to rise in regular loops from the first surface of the base fabric where they cross the weft threads, thereby weaving a loop fabric; [Step B] A step of attaching the resin for the binder layer to the second surface of the base fabric, and adhesively fixing the threads for engaging elements with the resin of the binder layer; [Step C] When the loops are made of monofilament threads, a step of heating the first surface side of the loop fabric to fix the loop shape, followed by cooling, and cutting one leg of the loop to make the loop into a hook-shaped engaging element. [Aspect 9] The method for producing a polyethylene terephthalate-based woven fabric surface fastener according to Aspect 8, wherein [Step B] is a step of attaching the resin for the binder layer in a molten state as a film-like substance to the second surface of the loop fabric, directly pressing the loop fabric together and densifying it to allow a portion of the film-like substance to penetrate into the second surface of the base fabric, and then cooling and solidifying the molten resin to bond it to the engaging element yarns. [Aspect 10] The method for producing a polyethylene terephthalate-based woven fabric surface fastener according to Aspect 8 or 9, wherein the film-like substance made of the resin for the binder layer is obtained by heating and melting a fiber sheet.[Aspect 11] A method for producing a polyethylene terephthalate-based woven fabric surface fastener according to any one of Aspects 8 to 10, wherein at least one thread selected from the group consisting of the warp threads, weft threads, and engaging element threads is a thread made of a polyethylene terephthalate-based resin copolymerized with isophthalic acid and having a melting point of 250 to 265° C. (preferably 250 to 257° C.) [Aspect 12] A method for producing a polyethylene terephthalate-based woven fabric surface fastener according to any one of Aspects 8 to 11, wherein the warp threads, weft threads, and engaging element threads are all threads made of a copolymerized polyethylene terephthalate resin containing, as copolymerization components, 1.0 to 2.0 mol % of isophthalic acid based on the total amount of dicarboxylic acids and 2.0 to 3.5 mol % of diethylene glycol based on the total amount of diols. [Aspect 13] A method for producing a polyethylene terephthalate-based woven surface fastener according to any one of Aspects 8 to 12, wherein the yarns made of polyethylene terephthalate-based resin used as the warp yarns, weft yarns, and engaging element yarns have a dry heat shrinkage rate at 200°C in the range of 10 to 35%. [Aspect 14] A method for producing a polyethylene terephthalate-based woven surface fastener according to any one of Aspects 8 to 13, wherein through holes are drilled in the binder resin layer. [Aspect 15] A method for producing a textile product with a polyethylene terephthalate-based woven surface fastener, comprising attaching the polyethylene terephthalate-based woven surface fastener according to any one of Aspects 3 to 5 to a textile product made of polyethylene terephthalate-based resin, and simultaneously dyeing the textile product in the attached state to the same color using a disperse dye. Furthermore, one aspect of the present invention may be a polyethylene terephthalate-based woven fabric surface fastener having a base fabric woven with warp threads, weft threads, and threads for engaging elements, a first surface of the base fabric being the front side and a second surface being the back side, threads for engaging elements being woven into the base fabric parallel to the warp threads, and a large number of hook-shaped and / or loop-shaped engaging elements formed from the threads for engaging elements and rising from the first surface of the base fabric on the surface (or first surface) of the base fabric, and wherein the warp threads, weft threads, and threads for engaging elements are all constituted by threads made of polyethylene terephthalate-based resin, and wherein the woven fabric surface fastener satisfies all of the following configurations 1) to 4).

[0017] 1) A binder layer made of a polyethylene terephthalate resin copolymerized with isophthalic acid and having a melting point of 160 to 210°C is directly bonded to the back surface (or second surface) of the base fabric opposite to the surface on which the engaging elements are present, and part of the resin of the binder layer penetrates into the interior of the base fabric; 2) The warp threads are threads made of a polyethylene terephthalate resin copolymerized with isophthalic acid and having a melting point of 250 to 257°C; 3) At the locations on the second surface of the base fabric where the engaging element threads slip under the weft threads, the engaging element threads are bonded to the binder layer by the resin constituting the binder layer present on the second surface of the base fabric; 4) At the locations on the first surface of the base fabric where the warp threads and engaging element threads straddle the weft threads, the warp threads and engaging element threads are not bonded to the weft threads.

[0018] Furthermore, one aspect of the present invention is a method for producing a woven fabric surface fastener, which uses a base fabric woven with warp yarns made of polyethylene terephthalate resin copolymerized with isophthalic acid and having a melting point of 250 to 257°C, and weft yarns and yarns for engaging elements made of polyethylene terephthalate resin, a first surface of the base fabric being the front side and a second surface being the back side, the yarns for engaging elements being woven into the base fabric parallel to the warp yarns, the first surface of the base fabric having a number of hook-shaped and / or loop-shaped engaging elements formed from the yarns for engaging elements and rising from the first surface of the base fabric, and the back surface (second surface) opposite the surface on which the engaging elements are present has a binder layer integrated thereon made of polyethylene terephthalate resin copolymerized with isophthalic acid and having a melting point of 160 to 210°C, characterized in that the method comprises the following steps A, B, and C in this order:

[0019] [Step A] When weaving a fabric from warp and weft threads, a step of weaving a loop fabric by weaving threads for engaging elements parallel to the warp threads and at the same time causing the threads for engaging elements to rise up in a regular loop shape from the first surface of the base fabric where they cross over the weft threads; [Step B] A step of attaching the resin for the binder layer to the second surface of the base fabric of the loop fabric and densifying the loop fabric to allow part of the resin for the binder layer to penetrate into the inside of the back surface of the base fabric, and then cooling and solidifying the binder resin; [Step C] When the loop is made of monofilament thread, a step of heating the first surface side of the base fabric to 180 to 230°C, cooling, and cutting one leg of the loop to form the loop into a hook-shaped engaging element.

[0020] As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms "at least one," unless the content clearly dictates otherwise. As used herein, the terms "and / or," "at least one," and "one or more" include any and all combinations of the associated listed items.

[0021] It should be noted that any combination of at least two elements disclosed in the claims and / or the specification and / or the drawings is included in the present invention, and in particular any combination of two or more of the claims set forth in the claims is included in the present invention.

[0022] In one embodiment of the PET-based woven surface fastener of the present invention, a layer (hereinafter this layer may be abbreviated as a PET resin layer) made of a PET-based resin (hereinafter this PET-based resin may be abbreviated as PET resin (A) or simply resin (A)) copolymerized with IPA and having a melting point of 160 to 210°C is disposed on the second surface of the base fabric as a binder layer, and the engaging element threads are directly bonded and fixed by this binder layer (or PET resin layer), thereby increasing the engaging force of the engaging elements.

[0023] The PET resin layer integrated with the second surface of the base fabric is made of a resin copolymerized with IPA to have a melting point of 160 to 210°C. Unlike typical PET resins which are rigid, this resin is highly flexible. Furthermore, since resin (A) of the PET resin layer is not present on the surface of the first surface of the base fabric, even though this flexible resin is integrated with the second surface of the base fabric, the woven surface fastener can be prevented from becoming rigid overall.

[0024] In one embodiment of the woven hook-and-loop fastener of the present invention, at the point where the engaging element thread is slipped under the weft thread on the second surface side of the base fabric, the engaging element thread is adhered to the PET resin (A) that constitutes the PET resin layer (or binder layer) present on the second surface side of the base fabric, but at the point where the warp thread and engaging element thread cross the weft thread on the first surface side of the base fabric, the warp thread and engaging element thread are not adhered to the weft thread.Therefore, the engaging element thread is adhered and fixed to the binder layer only at the point where it is exposed on the second surface side of the base fabric and in the vicinity thereof, and the engaging element is not substantially fixed to the base fabric by the same resin from the adhesively fixed point to the first surface of the base fabric.

[0025] In this case, since the engaging elements are not adhesively fixed to the base fabric by the PET resin (A) at the points where they rise from the surface of the base fabric, when used as a hook-and-loop fastener, even if pressure is applied to the engaging elements from above, the engaging elements can spread laterally on the surface of the base fabric and within the base fabric, tilt, or sink into the base fabric, etc., and the pressure from above can be dispersed. Therefore, the high flexibility of the PET resin (A) in the PET resin layer, combined with the fact that the resin does not fix the threads on the first surface side of the base fabric, improves the flexibility of the entire base fabric.

[0026] In one embodiment of the woven surface fastener of the present invention, when the warp and weft threads constituting the base fabric from the first surface side of the base fabric to near the second surface side are not adhesively fixed except by the PET resin layer on the second surface side of the base fabric, the area near the first surface side is not substantially adhesively fixed, which further improves the flexibility of the entire base fabric.

[0027] In one embodiment of the woven hook-and-loop fastener of the present invention, at least one of the warp and weft threads constituting the base fabric is made of IPA-copolymerized PET resin, and the PET resin layer bonded to the second surface of the base fabric is also made of IPA-copolymerized PET resin. Therefore, due to the affinity between the two, the warp and / or weft threads are more firmly fused and bonded to the PET resin layer, and repeated engagement and release during use as a hook-and-loop fastener or repeated washings rarely cause the base fabric and the PET resin layer to peel. Furthermore, if the thread for the engaging elements is also made of IPA-copolymerized PET, the effect of preventing peeling between the base fabric and the PET resin layer is further improved.

[0028] In the woven surface fastener of one embodiment of the present invention, when IPA-copolymerized PET is used for both the warp and / or weft yarns constituting the woven surface fastener and the PET resin layer, the IPA-copolymerized PET resin can lower the melting point without significantly impairing the film properties of the yarn or binder layer, and can also provide yarns and binder layers that have excellent bonding strength by heat fusion, as well as excellent flexibility and dyeability. In a particularly preferred embodiment, when IPA is copolymerized into the yarn, the yarn can be made to shrink significantly when heated, so that when a molten PET resin layer or the like is integrated with the second surface of the base fabric, the base fabric is thermally shrunk by heating during integration, and as a result, the PET resin (A) integrated with the second surface of the base fabric can be prevented from penetrating the base fabric and flowing or seeping out to the surface side.

[0029] Furthermore, IPA copolymerized PET is used as a raw material for PET bottles to provide anti-fogging properties to the PET bottles. Therefore, recycled yarns produced using resin recovered from PET bottles as a raw material so as to appropriately match the modification amount and melting point of the present invention can also be recycled and used as yarns constituting the hook-and-loop fastener of the present invention.

[0030] Furthermore, in the woven surface fastener of one embodiment of the present invention, the warp yarns, weft yarns, engaging element yarns, and the PET resin layer (or binder layer) integrated on the second surface are all made of PET-based yarns or resins, preferably IPA-copolymerized PET-based resins, and therefore, a woven surface fastener made of such yarns or layers can be improved in recyclability. For example, PET-based fibers are currently used in many clothing items and daily necessities such as gloves and shoes, and if the polyethylene terephthalate-based woven surface fastener of the present invention is attached to these PET-based textile products, it is not necessary to peel the woven surface fastener of the present invention from the textile product, and the textile product can be provided to a recycling system with the surface fastener attached.

[0031] Furthermore, in one embodiment of the woven surface fastener of the present invention, the warp threads, weft threads, threads for the engaging elements, and the binder layer on the second surface are all made of PET-based resin, so they can be dyed with ordinary disperse dyes.Furthermore, if these threads and layers are PET-based resin copolymerized with IPA, when they are dyed with disperse dyes, there is almost no difference in the dyeing between the base fabric portion of the surface fastener and the resin layer integrated on the second surface side, and there is no impression that something of a different color is integrated on the second surface side of the base fabric.

[0032] In particular, when a PET-based textile product to which a woven fabric hook-and-loop fastener of one embodiment of the present invention is attached is dyed with a disperse dye, the textile product and the woven fabric hook-and-loop fastener of the present invention can be dyed the same color at the same time, eliminating the need to dye them separately or to prepare a separate hook-and-loop fastener that has been pre-dyed the same color as the polyester-based textile product.

[0033] Fig. 1 is a cross-sectional view schematically showing an example of a woven surface fastener of the present invention. Fig. 2 is a cross-sectional view schematically showing another example of a woven surface fastener of the present invention. Fig. 3 is a view schematically showing an example of manufacturing the woven surface fastener of the present invention, in particular an example of pressing a binder layer in a molten state onto the second surface side of a base fabric.

[0034] The present invention will be described in detail below. First, the PET-based woven fabric surface fastener of the present invention can be broadly divided into three types: a hook surface fastener in which only hook-shaped engaging elements exist on the first surface of the base fabric, a loop surface fastener in which only loop-shaped engaging elements exist on the first surface of the base fabric, and a hook-loop coexistence type surface fastener in which both hook-shaped engaging elements and loop-shaped engaging elements exist side by side on the first surface of the base fabric.

[0035] Of these, the hook surface fastener is mainly formed from monofilament yarns for hook-shaped engaging elements, multifilament yarns for warp and weft, and a PET resin layer fusion-bonded to the second surface side of the base fabric. The loop surface fastener is mainly formed from multifilament yarns for loop-shaped engaging elements, multifilament yarns for warp and weft, and a PET resin layer fusion-bonded to the second surface side of the base fabric. Furthermore, a hook-loop coexisting surface fastener, in which hook-shaped engaging elements and loop-shaped engaging elements coexist on the same surface, is mainly formed from monofilament yarns for hook-shaped engaging elements, multifilament yarns for loop-shaped engaging elements, multifilament yarns for warp and weft, and a PET resin layer fusion-bonded to the second surface side of the base fabric.

[0036] The warp yarns (e.g., warp multifilament yarns), weft yarns (e.g., weft multifilament yarns), and engaging element yarns (e.g., monofilament yarns for hook-shaped engaging elements, multifilament yarns for loop-shaped engaging elements) must be fibers substantially composed of PET-based resins because they can prevent waving due to water and moisture absorption, can be firmly bonded by heat fusion to the PET resin layer bonded to the second surface of the base fabric, do not yellow due to the heat generated when fusion-bonding the PET resin layer to the second surface of the base fabric, are polyester-based fibers used in clothing and daily necessities, and when dyeing these products, the attached hook-and-loop fasteners can be dyed the same color at the same time, and the hook-and-loop fasteners can be recycled while attached to polyester-based fiber products. Here, "fibers substantially composed of PET-based resins" refers to fibers in which the proportion of PET-based resin in the fiber is, for example, 90% or more, preferably 98% or more, and more preferably 100% or more. Preferably, the fibers may be non-composite PET-based fibers.

[0037] The warp and / or weft yarns can be recyclable as long as they are multifilament yarns made of a PET-based resin, and for example, they may be multifilament yarns made of a PET-based resin having a melting point of 250 to 265°C. However, preferably, since the above requirements can be highly achieved, the warp and / or weft yarns may be multifilament yarns made of a PET-based resin copolymerized with IPA and having a melting point of 250 to 257°C and which may be copolymerized with IPA. Furthermore, it is preferable that the yarns for the loop-shaped engaging elements are multifilament yarns made of a PET-based resin having a melting point of 250 to 257°C and which may be copolymerized with IPA, and the yarns for the hook-shaped engaging elements are monofilament yarns made of a PET-based resin having a melting point of 250 to 257°C and which may be copolymerized with IPA.

[0038] When copolymerized PET is used as the resin for the threads and layers that make up the hook-and-loop fastener, if IPA is used as the copolymerization unit on the dicarboxylic acid side, the melting point can be lowered without significantly impairing the excellent thread properties, layer performance, ease of molding, etc. that PET has, and it is possible to obtain threads and films that have excellent joining strength by heat fusion, as well as excellent flexibility and dyeability, and it is also possible to obtain threads with high heat shrinkability, and it is also possible to make the threads and layers have excellent flexibility and dyeability, which is preferable.

[0039] The warp yarns are preferably IPA-copolymerized PET multifilament yarns, which are made of a PET polymer copolymerized with IPA and have ethylene terephthalate units as the main repeating units, and have a melting point of 250 to 257°C. Having a melting point within this range allows for a smooth weaving process, prevents the warp yarns from becoming excessively stiff, and improves the feel of the surface of the woven hook-and-loop fastener. Furthermore, when the hook-and-loop fastener is dyed with a disperse dye after being made into a hook-and-loop fastener, it is possible to suppress the occurrence of differences in dyeing with the layer made of PET resin (A) integrated on the second surface side of the base fabric, promoting uniform coloring as a hook-and-loop fastener and giving the impression of an integrated overall structure.

[0040] Preferably, the warp yarns are made of a multifilament PET resin copolymerized with 1.0 to 2.0 mol % of IPA based on the total amount of dicarboxylic acids, and in such a case, the above-mentioned advantages can be achieved to a greater extent. More preferably, the yarns are made of copolymerized PET containing 1.0 to 2.0 mol % of IPA based on the total amount of dicarboxylic acids and 2.0 to 3.5 mol % of DEG (diethylene glycol) based on the total amount of diols as copolymerization components.

[0041] Although DEG is normally naturally generated during the polymerization of PET and is contained in PET, the amount of 2.0 to 3.5 mol% specified in the present invention is greater than the amount naturally generated during the polymerization of PET for fiber. Therefore, it is preferable to use a PET-based resin obtained by adding DEG as part of the raw materials during the polymerization of PET for fiber for the yarn used in the present invention. However, PET-based resins for PET bottles may contain the above amount of DEG as a copolymerization component, and yarns obtained from such raw materials may also be used as appropriate.

[0042] Furthermore, it is preferable that the PET resin constituting the warp yarns is substantially free of copolymerization components other than IPA. Note that the copolymerization components other than IPA referred to here do not include DEG and triethylene glycol, which are naturally generated in small amounts when terephthalic acid, IPA, and ethylene glycol are condensed, or benzoic acid, which is used in small amounts as a terminal terminator during condensation polymerization of PET polymers.

[0043] A small amount (for example, 5% by weight or less, preferably 1% by weight or less) of PET-based yarns other than these may be woven into the base fabric of these hook-and-loop fasteners, if necessary.

[0044] As for the thickness (fineness) of the multifilament yarns constituting the warp, multifilament yarns consisting of 20 to 60 filaments and having a total decitex of 100 to 300 decitex are preferred, as this provides flexibility for the resulting hook-and-loop fastener and a dense base fabric that can prevent the resin of the resin layer integrated with the second surface from reaching the first surface side, and multifilament yarns consisting of 24 to 48 filaments and having a total decitex of 150 to 280 decitex are particularly preferred. Note that the thickness here refers to the thickness of the yarns used for weaving before heat shrinkage.

[0045] The weft yarn must be made of a PET-based resin, and may be a multifilament yarn made of an IPA-copolymerized PET-based resin having a melting point of, for example, 250 to 265°C, preferably 250 to 257°C, in which IPA is copolymerized. In particular, when the melting point of the PET-based resin constituting the weft yarn is 250 to 257°C, this is preferable because it prevents the base fabric from being excessively compressed and the weft yarn from becoming excessively stiff, gives the first surface of the woven surface fastener a soft feel, and, when dyed with a disperse dye, is less likely to produce a difference in color between the base fabric portion of the surface fastener and the resin layer integrated with the second surface.

[0046] Preferably, as with the warp yarns, multifilament yarns made of copolymerized PET containing 1.0 to 2.0 mol % of IPA based on the total amount of dicarboxylic acids and 2.0 to 3.5 mol % of DEG based on the total amount of diols as copolymerization components are used as the weft yarns, and in such cases the above-mentioned advantages of the present invention can be achieved to a greater extent.

[0047] As for the thickness of the multifilament yarn constituting the weft, a multifilament yarn consisting of 10 to 72 filaments and having a total decitex of 80 to 300 decitex is preferred for the same reasons as for the warp, and a multifilament yarn consisting of 18 to 56 filaments and having a total decitex of 90 to 260 decitex is particularly preferred. Note that the thickness here refers to the thickness of the yarn used for weaving before heat shrinkage.

[0048] The multifilament yarns used for these warp and weft yarns must not melt due to the heat applied when the PET resin layer is fusion-bonded to the second surface of the base fabric, and further due to the heat applied to the yarns for the engaging elements to fix the hook shape when the engaging elements are hook-shaped engaging elements, in order to soften the feel of the surface of the woven base fabric.To this end, it is preferable that the warp and weft yarns do not contain any low-melting point components that melt at temperatures below 250°C.

[0049] In the surface fastener of the present invention, when the engaging elements are hook-shaped engaging elements, the hook-shaped engaging elements are required to have so-called hook shape retention and rigidity, i.e., the hook shape is not extended by a light force, and for this reason, a thick monofilament thread is used. In the present invention, the monofilament thread is preferably formed from a PET-based resin, which has excellent hook shape retention properties.

[0050] This monofilament thread must be made of a PET-based resin, and may be made of an IPA-copolymerized PET-based resin having a melting point of, for example, 250 to 265° C., preferably 250 to 257° C., in which IPA is copolymerized. In particular, if the melting point is 250 to 257° C., the hook-shaped engaging elements are easily tilted and fixed in this state when the PET resin layer is melt-bonded to the second surface side of the base fabric, which not only prevents the engaging elements from losing their uprightness but also prevents the engaging elements from becoming excessively rigid, and furthermore, by reducing the thickness of the monofilament thread, the feel of the first surface of the woven fabric surface fastener can be softened.

[0051] Preferably, the monofilament yarn for the hook-shaped engaging elements is made of copolymerized PET containing 1.0 to 2.0 mol % IPA based on the total amount of dicarboxylic acids and 2.0 to 3.5 mol % DEG based on the total amount of diols as copolymerization components. In such a case, the feel of the first surface of the woven surface fastener is improved, and further, the thick monofilament yarn can be dyed deep with a disperse dye, with little difference in dyeing with the resin layer integrated on the second surface side of the base fabric. Furthermore, with hook-shaped engaging elements dyed in this manner, even if the surface of the hook-shaped engaging element is worn away by repeated engagement and peeling, exposing the inner layer of the hook-shaped engaging element, the inner layer of the monofilament is not noticeable. Note that the PET-based polymer constituting the weft yarn and the yarn for the engaging elements preferably does not contain any copolymerization component other than IPA as a copolymerization component on the dicarboxylic acid side.

[0052] The thickness of such monofilament thread for hook-shaped engaging elements made of PET resin is preferably 0.15 to 0.22 mm in diameter, from the viewpoint of the engaging force and the ability to densify the base fabric and prevent the resin of the resin layer that is integrated with the second surface from reaching the first surface, and more preferably 0.16 to 0.20 mm in diameter. Furthermore, to increase the engaging force, the cross-sectional shape of the monofilament may be an irregular cross-sectional shape, typically a polygonal shape such as a triangle or a square. Note that this thickness is the value before the monofilament thread is thermally shrunk, as described above.

[0053] Furthermore, in the hook-and-loop fastener of the present invention, when the engaging elements are loop-shaped engaging elements, the loop-shaped engaging elements are required to be able to maintain a loop shape that extends laterally, and for this purpose, as in the case of hook-shaped engaging elements, it is preferable to use a multifilament yarn made of a PET-based resin having a melting point of, for example, 250 to 265°C, preferably 250 to 257°C, and in which IPA is copolymerized.

[0054] In particular, when the melting point is 250 to 257°C, the uprightness of the loop-shaped engaging elements is well maintained when the PET resin layer is melt-bonded to the second surface side of the base fabric, and even if the loop-shaped engaging elements are repeatedly engaged and released, the loop shape pulled in the vertical direction can be well restored to the original loop shape expanded in the horizontal direction, and the repeated engaging force can be well maintained.

[0055] More preferably, the multifilament yarn is made of copolymerized PET containing 1.0 to 2.0 mol % of IPA based on the total amount of dicarboxylic acids and 2.0 to 3.5 mol % of DEG based on the total amount of diols as copolymerization components.In such a case, the feel of the surface of the woven surface fastener is improved, and further, by dyeing with disperse dyes under mild conditions, the engaging elements are also dyed in the same way.

[0056] The thickness of the multifilament yarn constituting the thread for the loop-shaped engaging element is preferably a multifilament yarn consisting of 5 to 15 filaments with a total decitex of 150 to 500 decitex, as this prevents the resin of the resin layer integrated with the second surface from reaching the first surface as the base fabric becomes denser. Multifilament yarn consisting of 6 to 12 filaments with a total decitex of 200 to 400 decitex is particularly preferred. As with the hook-shaped engaging element, the cross-sectional shape of the monofilament may be modified to have a polygonal cross-section, such as a triangle or a square, to increase the engaging force. Note that the thickness here refers to the thickness of the yarn used for weaving before heat shrinkage.

[0057] The melting point of the PET resin specified in the present invention means the melting peak temperature obtained by DSC measurement, and specifically, when approximately 6.5 mg of a thread removed from a hook-and-loop fastener and dried, or a resin scraped from the resin layer on the second surface side and dried, is placed in an aluminum cell, nitrogen is flowed at 50 ml / min in a nitrogen atmosphere using a differential calorimeter, and the temperature is raised from approximately 30°C to 300°C at a heating rate of 50°C / min in this state, the melting point means the apex temperature of the endothermic peak near the melting point of the first heating. Measurements are performed on five randomly removed threads or five scraped film points, and the average of the five values ​​obtained is taken from three points excluding the minimum and maximum values.

[0058] In addition, as will be described later, a binder layer, i.e., a layer made of PET resin (A) copolymerized with IPA and having a melting point of 160 to 210°C, is provided on the second surface side of the base fabric of the hook-and-loop fastener.

[0059] As described above, a woven surface fastener is manufactured from the above-mentioned multifilament yarns for warp, multifilament yarns for weft, monofilament yarns for hook-shaped engaging elements, or multifilament yarns for loop-shaped engaging elements by carrying out the following steps A, B, and C in this order.

[0060] [Step A] When weaving a fabric from warp and weft yarns, the threads for engaging elements are woven parallel to the warp yarns, and at the same time, the threads for engaging elements are caused to rise up in a regular loop shape from the first surface of the base fabric at the points where they cross the weft yarns, thereby weaving a loop fabric; [Step B] A PET resin (A) for a binder layer is attached to the back surface side of the loop fabric (i.e., the second surface side of the base fabric); [Step C] When the loops are made of monofilament yarns, the first surface side of the loop fabric (or the first surface side of the base fabric) is heated to 180 to 230°C, followed by cooling, and then one leg of the loop is cut to form the loop into a hook-shaped engaging element.

[0061] First, regarding the above-mentioned step A, the weave structure of the woven fabric is preferably a plain weave in which the threads for the engaging elements are part of the warp threads, and these threads for the engaging elements are woven parallel to the warp threads while rising from the surface of the base fabric midway through the weave, and when the threads for the engaging elements are monofilament threads, the weave structure is such that they form loops and jump over one to three warp threads and slip between the warp threads, while when the threads for the engaging elements are multifilament threads, the weave structure in which they form loops without crossing the warp threads or by crossing over one warp thread, and which exist parallel to the warp threads, makes it easier for the loop surfaces to face in the same direction and is preferable in terms of appearance, and furthermore, in the case of loops for hook-shaped engaging elements, it is preferable because one leg side of the loop can be cut efficiently and reliably and further the hook-shaped engaging elements and the loop-shaped engaging elements can easily engage with each other.

[0062] The weave density of the warp yarns is preferably 35 to 80 threads / cm after heat shrinkage, and the weft yarns is preferably 12 to 30 threads / cm after heat shrinkage, because this densifies the base fabric and prevents the resin of the resin layer that integrates with the second surface from reaching the first surface. The weight ratio of the weft yarns is preferably 15 to 40% of the total weight of the yarns for the hook-shaped engaging elements, the yarns for the loop-shaped engaging elements, the warp yarns, and the weft yarns that make up the woven fabric surface fastener. In addition, in the woven fabric surface fastener of the present invention, the height of the hook-shaped engaging elements is preferably 1.2 to 1.8 mm from the surface of the woven fabric base fabric, and the height of the loop-shaped engaging elements is preferably 1.9 to 3.0 mm from the surface of the woven fabric base fabric, in terms of engaging force and resistance to collapse of the engaging elements.

[0063] The density of the hook-shaped engaging elements in the hook surface fastener is 30 to 70 pieces / cm based on the base fabric portion where the engaging elements are present and after heat shrinkage. ２ The density of the loop-shaped engaging elements in the loop surface fastener is 30 to 70 pieces / cm after heat shrinkage under the same standard. ２ The total density of the hook-shaped engaging elements and the loop-shaped engaging elements in the hook-loop coexisting surface fastener is 30 to 70 pieces / cm after heat shrinkage under the same standard. ２ In the hook-loop coexisting surface fastener, the ratio of the number of hook-shaped engaging elements to the number of loop-shaped engaging elements is preferably in the range of 40:60 to 60:40.

[0064] In addition, in a hook surface fastener, the number of monofilament threads for the hook-shaped engaging elements is preferably about 2 to 8 threads per 20 warp threads (including monofilament threads for the hook-shaped engaging elements), and in a loop surface fastener, the number of multifilament threads for the loop-shaped engaging elements is preferably about 2 to 8 threads per 20 warp threads (including monofilament threads for the hook-shaped engaging elements).

[0065] Furthermore, in the case of a hook-and-loop parallel surface fastener, the total number of monofilament yarns for hook-shaped engaging elements and multifilament yarns for loop-shaped engaging elements is preferably 2 to 8 per 20 warp threads (including monofilament yarns for hook-shaped engaging elements and multifilament yarns for loop-shaped engaging elements), and the ratio of the number of monofilament yarns for hook-shaped engaging elements to the number of multifilament yarns for loop-shaped engaging elements is preferably in the range of 40:60 to 60:40.

[0066] In addition, when forming loops for hook-shaped engaging elements, in order to facilitate the formation of loops for hook-shaped engaging elements of uniform height, a method may be used in which a plurality of metal rods are placed on the base fabric parallel to the warp at a position where the thread for hook-shaped engaging elements straddles the warp thread, the thread for engaging elements is passed through the top of these metal rods to form a loop, and after the loop is formed, the metal rods are pulled out of the loop.

[0067] The thus obtained fabric for a hook-and-loop fastener (hereinafter, may be referred to as a loop fabric) is then sent to the step B. The step B is not particularly limited as long as the threads for the engaging elements can be bonded and fixed by the resin of the binder layer.

[0068] For example, Figure 3 attached herewith is a schematic diagram showing an example of an apparatus that can efficiently perform this step B. The back surface of the loop fabric, i.e., the second surface of the base fabric, may be simply referred to as the second surface of the loop fabric hereinafter. Figure 3 is a schematic diagram showing how a PET resin layer having a melting point of 160 to 210°C is pressed in a molten state onto the second surface side of the loop fabric woven in the above step A. In this step B, a molten film of PET resin (A) having a melting point of 160 to 210°C is directly pressed onto the second surface side of the loop fabric, and a portion of the molten PET resin (A) is pressed into (penetrates into) the base fabric on the second surface side of the loop fabric.

[0069] In the present invention, "part of the resin of the binder layer has penetrated into the base fabric" means that part of the resin constituting the binder layer has penetrated into the recessed portion on the second surface side of the base fabric, and represents a state in which the resin (A) has penetrated into the recessed portion (8) shown in Figures 1 and 2. The recessed portion is formed because the warp yarns or the engaging element yarns rise above the weft yarns on the first surface side. For example, when part of the resin constituting the PET resin layer has penetrated into the base fabric, a method is preferably used in which the two are pressed together when a molten film of the resin (A) is integrated with the second surface side of the loop fabric.

[0070] Preferably, the warp, weft, and engaging element yarns have a dry heat shrinkage rate of 10 to 35% at 200°C. The heat generated when integrating the molten film of resin (A) with the second surface of the loop fabric causes the yarns constituting the loop fabric to shrink, further densifying the fabric. This closes the weave of the fabric, preventing the molten resin (A) from penetrating the first surface of the base fabric or seeping out onto the surface of the first surface, and instead remaining in the recesses. As a result, the layer of resin (A) is firmly bonded to the second surface of the base fabric, and the first surface of the base fabric is not fixed between the yarns by the resin (A), thereby maintaining flexibility. More preferably, the warp has a dry heat shrinkage rate of 20 to 30% at 200°C, the weft has a dry heat shrinkage rate of 15 to 30%, and the engaging element yarns have a dry heat shrinkage rate of 20 to 30%.

[0071] Furthermore, if the dry heat shrinkage rate is high, when the resin layer is integrated onto the second surface of the base fabric, the heat causes the multifilament yarns constituting the loop fabric to shrink in the longitudinal direction, making the cross-sectional shape thicker and furthermore forming a flat shape that spreads laterally as shown by the weft yarns in Figures 1 and 2. This also causes the weave of the fabric to be blocked, making it difficult for the molten resin (A) to penetrate or seep out to the first surface side of the base fabric, and at the points where the warp yarns and engaging element yarns cross the weft yarns on the first surface side of the base fabric, the warp yarns and engaging element yarns are not bonded to the weft yarns; in other words, the warp yarns and engaging element yarns are not bonded to the weft yarns via the PET resin in the binder layer.

[0072] That is, in step A, the thickness and weaving density of the threads (warp and / or weft) that make up the loop fabric are increased to weave a dense loop fabric, and then in step B, the dense loop fabric is made even denser by heat-shrinking the constituent threads, so that the warp threads and the threads for engaging elements are not bonded to the weft threads at the locations where they cross the weft threads on the first surface side of the base fabric.

[0073] The 200°C dry heat shrinkage rate specified in the present invention is the average value of the shrinkage rates obtained by leaving 10 50 cm yarns in a free state for 1 minute in an atmosphere at 200°C and measuring the shrinkage rate of the yarns that have shrunk after 1 minute. Polyester yarns with such dry heat shrinkage rates are sold by synthetic fiber manufacturers with various shrinkage rates, and it is possible to select from these, or to have a synthetic fiber manufacturer order a yarn with the desired dry heat shrinkage rate, or to easily obtain such yarn by subjecting commercially available polyester yarns to a heat elongation treatment or the like.

[0074] An example of an apparatus capable of carrying out the above-mentioned step B will be explained with reference to FIG. 3. A molten film (6) made of PET resin (A) copolymerized with IPA and having a melting point of 160 to 210°C is extruded from a T-die (T), and while this film (6) is kept in a molten state, it is cooled by a cooling roll (R １ ) and press roll (R ２ ) between the press rolls (R ２ The molten film (6) is pressed onto the back surface (or the second surface of the base fabric) of the loop fabric (10) for the hook-and-loop fastener woven in step A, which is fed along the surface of the cooling roll (R) to integrate the two. １ ), and the molten film (6) is cooled and solidified to form a PET resin layer (6) made of PET resin (A), and then the PET resin layer (6) is cooled and solidified by a cooling roll (R １ The laminate in which the PET resin layer (6) is integrated onto the second surface side of the base fabric is passed through a sweeper roll (R ４ ) Peel it off by lining it with the surface.

[0075] At this time, the press roll (R ２When a roll having countless fine needle-like projections attached to its surface is used as the fastener, the PET resin layer (6) made of resin (A) is perforated with numerous holes penetrating the layer in the thickness direction. The presence of these holes makes the hook-and-loop fastener breathable, reducing stuffiness even when used in skin-contact applications. Furthermore, when the hook-and-loop fastener is subsequently dyed with a disperse dye, the dye solution flows in and out through these holes, allowing the binder layer to be easily dyed up to a position close to the second surface of the base fabric. When the hook-and-loop fastener is cut, the cross section shows that the base fabric and binder layer are uniformly dyed, which is visually appealing and is particularly advantageous when the dye is a dark color, as it reduces the discoloration between the base fabric and the binder layer. Here, "dark color" refers to a color with low brightness, and may be, for example, a color with a brightness of 7 or less on the Munsell color system.

[0076] Furthermore, as a method for forming a large number of holes penetrating through the layer (6) made of resin (A) in its thickness direction, in addition to the above-mentioned method using a press roll (R2) having countless fine needle-like projections on its surface, other methods may be used, such as a method of forming holes in advance in the layer of molten resin (A) before integration, or a method of forming holes in the layer of resin (A) present on the second surface side at the stage of the manufactured hook-and-loop fastener. Furthermore, as the layer made of resin (A), a fiber sheet of nonwoven fabric or woven or knitted fabric may be used as described below. In the case of a fiber sheet, if a method is used in which part of it is melted, the other part will remain in a fibrous state and will function as ventilation holes.

[0077] The binder layer integrated with the second surface of the loop fabric is a PET resin (A) having a melting point of 160 to 210°C. If the melting point exceeds 210°C, when the fused film is pressure-bonded to the second surface of the loop fabric, the entire hook-and-loop fastener fabric is compressed, and even after release, the compressed state is not fully restored, resulting in a soft feel on the hook-and-loop fastener surface. Furthermore, some of the engaging element loops cannot rise from their collapsed state, and a hook-and-loop fastener having engaging elements standing upright from the first surface of the base fabric cannot be obtained. Furthermore, if the melting point is less than 160°C, the PET resin (A) of the obtained hook-and-loop fastener is likely to melt and migrate from the second surface of the hook-and-loop fastener when ironed during the finishing process of the textile product, impairing the pull-out resistance of the engaging elements and damaging the attached textile product. Preferably, the melting point of the PET resin (A) is in the range of 170 to 205°C.

[0078] In order to adjust the melting point of the PET resin (A) to 160 to 210°C, the PET resin is preferably copolymerized with 15 to 25 mol% IPA, and more preferably 16 to 22 mol% IPA.

[0079] The PET resin (A) constituting the PET resin layer (binder layer) integrated onto the second surface of the loop fabric is copolymerized with IPA and is required to have a melting point of 160 to 210°C. Such a PET resin (A) is an isophthalic acid copolymerized PET obtained by condensation polymerization of terephthalic acid, IPA, and ethylene glycol, and preferably does not contain any copolymerization component other than IPA as a dicarboxylic acid from the viewpoint of recycling and reuse.

[0080] In addition, when the crystalline state of the resin to be measured becomes amorphous due to copolymerization or the like and a clear melting point cannot be measured, the softening point is treated as the melting point. The softening point is measured by placing resin chips in a hot air dryer at a specified temperature and blowing air at 0.1 kg / cm 2 This means the lowest temperature at which the chips are fused together to the extent that the boundaries between them cannot be determined when a pressure of 1000 kJ / cm is applied for 10 minutes.

[0081] The temperature at which the molten PET resin (A) is integrated with the second surface side of the loop fabric is preferably 5 to 25°C higher than the melting point of the PET resin (A). From the viewpoint of improving the pull-out resistance of the engaging elements, it is preferable that the temperature of the PET resin (A) during integration be within the above range, because the molten PET resin (A) sufficiently penetrates into the structure of the base fabric from the second surface of the loop fabric, thereby obtaining sufficient pull-out resistance of the engaging elements. Furthermore, it is preferable that the temperature of the PET resin (A) during integration be within the above range, because it prevents the molten PET resin (A) from penetrating too deeply toward the first surface side of the base fabric of the loop fabric, for example, it prevents the molten PET resin (A) from being exposed on the first surface side of the base fabric and hardening the entire hook-and-loop fastener fabric, and in particular it prevents the feel of the hook-and-loop fastener surface from becoming hard.

[0082] In addition, when the binder layer is integrated with the second surface of the loop fabric, if the pressure for pressing is too high, the binder layer integrated with the second surface of the base fabric may penetrate from the second surface side to the first surface side of the base fabric. １ ) and press roll (R ２ The weight of the binder layer integrated with the second surface of the loop fabric is, for example, 30 to 100 g / m ２ , preferably 40 to 90 g / m ２ , more preferably 50 to 80 g / m ２ The range is preferable in terms of the pull-out resistance of the engaging elements and also in terms of the flexibility of the surface fastener.

[0083] Although the case where the melted PET resin (A) is formed into a film and integrated in a molten state onto the second surface of the loop woven fabric has been described as step B, the present invention is not limited to this case. Other examples of step B include a method in which a fiber sheet or film made of PET resin (A) having a melting point of 160 to 210°C, such as a spunbond nonwoven fabric or meltblown nonwoven fabric, is superimposed on the second surface of the loop woven fabric, and heat is applied in this state to melt the fiber sheet or film, and then the fiber sheet or film is pressed against the second surface of the loop woven fabric in this state.

[0084] In this case, in addition to the method of melt-pressing the entire surface of the hook-and-loop fastener fabric, a method of melt-pressing in spots may also be used. In this case, it is preferable to melt-press the insulator in small spots so that most of the engaging element threads exposed on the second surface of the hook-and-loop fastener are fixed by the melt.

[0085] In addition to the method of coating the second surface of the woven fabric with a thermoplastic resin as described above, a method is also possible in which a PET resin (A) soluble or dispersible in water or an organic solvent such as ethyl acetate is diluted with water or an organic solvent such as ethyl acetate to form a liquid raw material composition with a solids concentration of about 5 to 60% by mass, and the polyester resin is applied to the second surface of the woven fabric by coating with a roller coater or by spraying, followed by drying to form a resin layer on the second surface of the woven fabric. If it is desired to achieve film strength that can withstand forces attempting to pull out the elements, which is required for use as a hook-and-loop fastener, using this method, the entire woven hook-and-loop fastener containing the polyester resin applied to the second surface of the woven fabric may be heated to or above the melting point of the applied PET resin (A) to melt it, and the molten PET resins (A) may be coagulated to form a resin film, and the resin film may bond the fibers in the base fabric portion of the woven fabric. Alternatively, the PET resin (A) may be crosslinked with a melamine resin or the like to obtain the film strength necessary to withstand the force of pulling out the element. When dissolving the coated PET resin (A) and aggregating the resins to form a resin film, if a sufficient resin film cannot be formed with the amount of resin that can be normally coated with a general coating machine, multiple coatings, such as two coats, may be performed. The shape of the resulting resin layer is not limited, and may be a continuous phase or a discontinuous layer deposited in spots, as long as it is effective in adhering the engaging element thread.

[0086] By this step B, the threads for the engaging elements are fixed by the PET resin (A) in the weave of the second surface side of the loop fabric, thereby obtaining excellent pull-out resistance of the engaging elements. The direct contact of the PET resin (A) with the second surface of the hook-and-loop fastener fabric is necessary for improving the pull-out resistance of the engaging elements and for enabling the hook-and-loop fastener of the present invention to be used in a recycling system. If the second surface of the hook-and-loop fastener fabric is integrated with an adhesive other than the PET resin (A), such as a polyurethane-based, polyacrylic-based, or polyolefin-based adhesive, the presence of this adhesive will impair the recyclability of the hook-and-loop fastener. Furthermore, this adhesive will seep not only onto the second surface side of the hook-and-loop fastener base fabric but also onto the first surface side of the hook-and-loop fastener base fabric, hardening the entire hook-and-loop fastener fabric, resulting in a loss of flexibility of the entire hook-and-loop fastener, especially the flexibility of the surface.

[0087] The thus obtained woven fabric for a hook and loop fastener, in which a layer made of PET resin (A) is integrated onto the second surface side of a base fabric, may then be subjected to the above-mentioned step C, if necessary. In step C, when the loops of the loop fabric contain monofilament yarns, i.e., in the case of a hook or hook-and-loop coexisting type hook and loop fastener, the surface of the loop fabric on which the loops are formed (hereinafter sometimes simply referred to as the first surface of the loop fabric) is heated to, for example, 150 to 250°C, preferably 180 to 230°C, and then cooled, and the fabric is sent to a step in which one leg of the loop is cut to convert the loop into a hook-like engaging element. Note that when the loops are made of only multifilament yarns, i.e., in the case of a loop hook and loop fastener, this step C is not necessary.

[0088] The heating of the first surface side of the loop fabric in step C is carried out to fix the loop shape of the hook-like engagement elements. Even if the heating temperature exceeds the melting point of resin (A), the melting state of resin (A) can be controlled by adjusting the heating time as described below. However, it is preferable to heat the loops for hook engagement elements on the first surface side of the loop fabric to 150 to 250°C. If the heating temperature is less than 150°C, the shape of the loops for hook engagement elements will not be fixed sufficiently, and the hook shape of the hook-like engagement elements cut in the subsequent step of cutting one leg of the loops for hook engagement elements will stretch, making them less able to engage. Furthermore, if the heating temperature exceeds 250°C, the layer made of resin (A) integrated on the second surface side of the base fabric will melt or soften, exposing resin (A) on the first surface of the base fabric or causing the base fabric to become film-like overall, impairing the overall flexibility and surface feel. The preferred range is 180 to 230°C.

[0089] The time for such heating is preferably in the range of 20 to 120 seconds. Usually, a method is used in which a woven fabric for a hook-and-loop fastener, which has loops for hook-shaped engaging elements on the first surface of a base fabric and a layer made of resin (A) integrated on the second surface side of the base fabric, is passed at a constant speed through a heating zone maintained at the above temperature.

[0090] In this way, after the loop for the hook engaging element present on the first surface of the base fabric is fixed in shape by heat, one leg of this loop is cut to form the loop into a hook-like engaging element. The cutting device used for this purpose is preferably one that has a structure in which one leg of the loop for the hook-like engaging element of a woven fabric for a hook surface fastener or a woven fabric for a hook-and-loop co-existing type surface fastener running in the warp direction is cut by the reciprocating motion of a movable cutting blade between two fixed blades. The woven fabric with one leg of the loop for the hook-like engaging element cut off is used as a hook surface fastener or a hook-and-loop co-existing type surface fastener.

[0091] Although it is not necessary to carry out the above-mentioned step C for the loops for the loop-shaped engaging elements, it is preferable to form the loops and loosen the multifilament yarns so that they can be easily engaged with the hook-shaped engaging elements. Specifically, it is preferable to use a method in which the surface of the hook-and-loop fastener having the loop-shaped engaging elements is rubbed with card clothing or the like to loosen the bundle of multifilament yarns that form the loops.

[0092] In the PET-based woven surface fastener obtained in this manner, the threads for the engaging elements are directly bonded and fixed by the resin in the binder layer, or at the locations where the threads for the engaging elements are tucked under the weft threads on the second surface side of the base fabric, the threads for the engaging elements are bonded to the layer on the second surface side of the base fabric by the PET resin (A) that constitutes the layer, thereby preventing the engaging elements from being pulled out from the surface of the base fabric.

[0093] The thickness of the binder layer may be, for example, 20 to 80 μm, preferably 30 to 70 μm, and more preferably 40 to 60 μm, as measured by the method described in the examples below.

[0094] Furthermore, the PET-based woven surface fastener thus obtained is preferably dyed. The dyeing is preferably carried out by a high-temperature, high-pressure dyeing method using a disperse dye, which is widely used for dyeing polyester-based textile products. That is, the PET-based woven surface fastener of the present invention is wound into a roll in a long state, specifically, a surface fastener having a length of 50 to 300 m, and the roll is placed on a partition plate with holes. A plurality of such partition plates with the rolled surface placed thereon are stacked vertically and inserted into a dyeing tank, and a dye solution is circulated in the tank to bring the surface fastener into contact with the dye solution.

[0095] Specific dyeing conditions include, for example, dyeing for about 20 to 120 minutes at about 120 to 140° C. The type of disperse dye used for dyeing is not particularly limited, and any disperse dye that has conventionally been used for dyeing polyester fibers can be used, such as monoazo-based, diazo-based, anthraquinone-based, nitro-based, styryl-based, and methine-based disperse dyes.

[0096] In this case, if a large number of holes are made through the layer of resin (A) integrated with the second surface side of the base fabric of the woven fabric hook-and-loop fastener in the thickness direction, the presence of these holes allows the dye solution to penetrate the layer of resin (A) and dye up to a location close to the second surface side of the woven fabric base fabric, and when the hook-and-loop fastener is cut, the cross section is dyed uniformly, which is preferable in terms of appearance. Such dyeing is preferable in that it improves the appearance, especially in dark colors.

[0097] Furthermore, in the case of the woven surface fastener of the present invention, the resin (A) integrated on the second surface side of the base fabric has the PET crystal structure greatly disrupted by the IPA units, resulting in the presence of many amorphous regions. Therefore, when dyed with a disperse dye, the dye molecules can easily penetrate into these amorphous regions, making it easy to dye. Therefore, even if the surface fastener is fixed to the object to be attached by an attachment method in which the layer made of resin (A) on the second surface side of the base fabric is exposed, there is no need to worry about the color tone.

[0098] FIG. 1 is a diagram schematically showing the cross section of a hook hook-and-loop fastener, which is an example of a PET-based woven fabric hook-and-loop fastener of the present invention. FIG. 2 is a diagram schematically showing the cross section of a loop hook-and-loop fastener, which is another example of a PET-based woven fabric hook-and-loop fastener of the present invention. In both diagrams, the cross section is taken parallel to the warp threads so that the warp threads appear in the cross section, and the engaging element threads are present at the back of the cross section. As can be seen from these diagrams, in the hook-and-loop fastener of the present invention, the weft threads (1) are at the center, and the warp threads (2) rise and fall above and below the weft threads (1) to form the base fabric (5). The engaging element threads are woven into the base fabric (5) parallel to the warp threads and rise regularly from the first surface of the base fabric in various places. Here, the upper side refers to the first surface side, and the lower side refers to the second surface side.

[0099] Figure 1 shows the case where the engaging element is a hook-shaped engaging element (3), and Figure 2 shows the case where the engaging element is a loop-shaped engaging element (4). In the case of the hook-shaped engaging element (3), one leg of the loop is cut to form a hook shape. The warp yarn (2) and weft yarn (1) are made of multifilament yarn (although in Figures 1 and 2 the warp yarn is shown as one, it is actually an aggregate of many thin filament yarns), and the yarn for the loop-shaped engaging element is also made of multifilament yarn. In order to increase the possibility of the loop-shaped engaging element engaging with the hook-shaped engaging element, the bundle of multifilament yarn is loosened at the loop portion.

[0100] In the PET-based woven fabric surface fastener of the present invention, a layer (6) made of resin (A) is directly integrated with the second surface side of the base fabric, and a portion of the resin (A) fills the depressions (8) formed by the intersections of the textile yarns, as shown as depressions (8) in these figures, thereby firmly integrating the layer (6) made of resin (A) with the base fabric.

[0101] The layer (6) made of resin (A) has a large number of holes (7) penetrating the layer. For example, the diameter of the through holes may be 10 to 1000 μm, preferably 50 to 500 μm. At the locations where the threads for the engaging elements are hidden under the warp threads on the second surface side of the base fabric (the locations marked with 9 in Figures 1 and 2), the threads for the engaging elements are adhered and fixed to the layer made of resin (A) present on the second surface side of the base fabric, thereby preventing the engaging elements from being pulled out from the surface of the base fabric. At the first surface side of the base fabric, i.e., the locations where the warp threads are above the weft threads, the warp threads and the threads for the engaging elements cross the weft threads but are not adhered to the weft threads, resulting in a soft and gentle feel to the surface of the hook-and-loop fastener.

[0102] In addition, the pull-out force of the engaging element referred to in this invention is the value measured of the maximum strength when the engaging element is pulled out from the base fabric of the hook fastener, and in the case of a hook surface fastener, it means the value of the pull-out force of the hook-shaped engaging element, and in the case of a loop surface fastener, it means the value measured by cutting the thread at the point where the thread formed the loop-shaped engaging element floated up to the first surface of the woven base fabric as a loop and then measuring the pull-out force of the loop-shaped engaging element. In this invention, 10 of these were randomly selected, their pull-out forces were measured, and the average value was used.

[0103] The PET-based woven fabric hook-and-loop fastener of the present invention can be used in a wide range of applications in which conventional, general woven fabric hook-and-loop fasteners are used, such as clothing, shoes, bags, hats, gloves, etc., as well as blood pressure monitors, supports, various toys, small items, curtains, etc. It is particularly suitable for applications where a good feel and flexibility are required and where the hook-and-loop fastener is attached to fabric or sheet by sewing, such as clothing, shoes, bags, hats, gloves, supports, etc.

[0104] In particular, the PET-based woven surface fastener of the present invention is suitable as a fastening material for polyester textile products to be dyed with disperse dyes, and is suitable for applications in which the PET-based woven surface fastener of the present invention is attached to the polyester textile product by sewing or the like, and then the textile product and the surface fastener are dyed simultaneously with the disperse dye, i.e., so-called piece dyeing applications.Furthermore, the PET-based woven surface fastener of the present invention is suitable for applications in which the textile product is recycled in a recycling system after use without being removed from the textile product.

[0105] The present invention will be explained in more detail below with reference to examples. In the examples, the engaging force of the hook-and-loop fasteners was measured in accordance with JIS L 3416:2000. When the hook-and-loop fasteners of the examples and comparative examples were hook-and-loop fasteners, B2790Y (manufactured by Kuraray Fastening Co., Ltd.) was used as a loop hook-and-loop fastener to be engaged with in measuring the engaging force. When the hook-and-loop fasteners of the examples and comparative examples were loop-and-loop fasteners, A8693Y (manufactured by Kuraray Fastening Co., Ltd.) was used as a hook-and-loop fastener. When the hook-and-loop fasteners of the examples and comparative examples were hook-and-loop coexisting type fasteners, the same hook-and-loop coexisting type fasteners were used.

[0106] In the following examples and comparative examples, the copolymerization ratio of IPA and DEG refers to the ratio relative to the total moles of the dicarboxylic acid component of the polymerization raw material for IPA, and the ratio relative to the total moles of the diol component for DEG. In the following tables, "Tm" means melting point, and "Dsr200°C" means 200°C dry heat shrinkage.

[0107] Example 1 The following yarns were prepared as the warp and weft yarns constituting the base fabric of the hook surface fastener and the monofilament yarns for the hook-shaped engaging elements, and the following resin was prepared as the PET resin integrated into the second surface of the surface fastener: [Warp] - Multifilament yarn made of copolymerized PET (copolymerization ratio: IPA 1.3 mol % and DEG 2.5 mol %) - Total decitex and number of filaments: 167 dtex, 30 filaments - Melting point: 256.0°C - Dry heat shrinkage at 200°C: 22.1%

[0108] [Weft yarn] Multifilament yarn made of copolymerized PET (copolymerization ratio: 1.3 mol% IPA and 2.5 mol% DEG) Total decitex and number of filaments: 198 dtex and 48 filaments Melting point: 255.4°C Dry heat shrinkage at 200°C: 22.3% [Monofilament yarn for hook-shaped engaging element] Monofilament yarn made of copolymerized PET (copolymerization ratio: 1.3 mol% IPA and 2.6 mol% DEG) Diameter: 0.19 mm Melting point: 255.0°C Dry heat shrinkage at 200°C: 24.2% [PET-based resin integrated into the second surface of the hook-and-loop fastener] Resin made of copolymerized PET (copolymerization ratio: 18 mol% IPA copolymerized) Melting point: 192.0°C

[0109] [Manufacturing of Hook Surface Fasteners] Using the above warp yarns, weft yarns, and monofilament yarns for hook-shaped engaging elements, a plain weave was used as the weave structure, and the weave density after heat shrinkage was 55 warp yarns / cm and 19 weft yarns / cm, and the monofilament yarns for hook-shaped engaging elements were woven parallel to the warp yarns at a ratio of 1 for every 4 warp yarns, and after 5 weft yarns were floated and sunk, the monofilament yarns were made to straddle three warp yarns, and loops were formed on the base fabric at the straddled points. Note that when forming the loops for the hook-shaped engaging elements, a method was used in which multiple metal rods were placed on the woven base fabric parallel to the warp yarns at the positions where the yarns for hook-shaped engaging elements straddle the warp yarns, and the yarns for engaging elements were passed over the metal rods to form loops, and after the loops were formed, the metal rods were pulled out of the loops.

[0110] The fabric tape for hook surface fasteners woven under the above conditions was passed through a cooling roll (R １ ) and press roll (R ２ On the other hand, the PET resin as the resin constituting the binder layer was heated to 205°C and melted, and extruded from a T-die (T) in the form of a layer (molten resin layer (6)). While the resin was kept in a molten state at 205°C, it was passed through a cooling roll (R １ ) and press roll (R ２The molten resin layer (6) was pressed onto the second surface of the loop fabric tape (10) for the hook-and-loop fastener running between the cooling roll (10) and the cooling roll (10), and the two were integrated. At this time, the surface of the cooling roll was provided with needle-like projections at a density of 18.5 / cm so that holes (7) with a diameter of 50 to 500 μm were formed penetrating from the back surface to the front surface of the resin layer (6). ２ The resin layer (6) has a thickness of 50 μm and a basis weight of 63 g / m ２ The thickness of the resin layer (6) is an average value obtained by averaging the dimensional measurement results of 30 points on the cross section of the resin layer using a measuring microscope such as a digital microscope, and was measured in the same manner as described below.

[0111] Then, the cooling roll (R １ The integrated product of the two was run along the roll surface of a sweeper roll (R4) while the resin layer (6) was cooled and solidified, and the fabric tape for a hook surface fastener, with the binder layer (6) integrated on the second surface of the base fabric, was then peeled off from the surface of the cooling roll (R1) by running it along the surface of a sweeper roll (R4). The resulting fabric tape for a hook surface fastener with the integrated binder layer was then allowed to stay in a heating zone at 210°C for 60 seconds to fix the loop shape of the loop for the hook-like engaging element present on the first surface of the base fabric. The fabric was then cooled, and subsequently one leg of the loop for the hook-like engaging element was cut using a cutting device configured to cut by the reciprocating motion of a movable cutting blade between two fixed blades, to form a hook-like engaging element. Note that the process from weaving the fabric to the process of integrating the binder layer on the second surface of the base fabric and the process of cutting one leg were carried out continuously without winding.

[0112] The density of the hook-shaped engaging elements of the resulting woven surface fastener having the hook-shaped engaging elements was 45 pieces / cm ２The hook-shaped engaging elements were 1.5 mm high from the surface of the woven fabric base. Detailed observation of this hook-and-loop fastener under a microscope revealed that some of the resin in the layer integrated with the second surface of the base had penetrated into the base, but that the weave was blocked by thermal shrinkage of the yarns constituting the woven fabric, preventing the resin from seeping through to the first surface of the base. Furthermore, cutting the hook-and-loop fastener parallel to the warp and weft yarns confirmed that, where the warp yarns and engaging element yarns straddled the weft yarns on the first surface of the base, the warp yarns and engaging element yarns were not bonded to the weft yarns by the PET resin integrated with the second surface of the base. At the same time, where the engaging element yarns slipped under the weft yarns on the second surface of the base, the engaging element yarns were bonded to the layer by the resin constituting the layer present on the second surface of the base. The pull-out force of the hook-shaped engaging elements of this hook surface fastener was measured and found to be 10.01 N / piece, indicating excellent pull-out resistance.

[0113] The surface feel of this hook-and-loop fastener was also observed. Specifically, 13 people involved in the manufacture and research of hook-and-loop fasteners were asked to touch the surfaces of a commercially available PET-based woven hook-and-loop fastener (A8693R.00 manufactured by Kuraray Fastening Co., Ltd.) in which the engaging elements are fixed by thermal fusion of the weft yarns, and the hook-and-loop fastener obtained in this example. They were then asked which hook-and-loop fastener felt softer to the touch. All 13 people answered that the hook-and-loop fastener of this example felt better to the touch. Most of the 13 people evaluated the hook-and-loop fastener of this example as having a softer, gentler feel than conventional hook-and-loop fasteners, despite the fact that it is a PET-based hook-and-loop fastener, which is said to be inherently inferior in terms of flexibility. Here, the surface feel was evaluated relative to a comparative hook-and-loop fastener, based on whether the engaging elements felt gentle on the skin and did not prick the skin.

[0114] Regarding the overall hardness of the hook-and-loop fastener, if the base fabric part of the hook-and-loop fastener was stiff and difficult to grip when the fastener was gripped as a whole, it was judged to be hard overall, i.e., inflexible; if the base fabric part was soft and easy to grip, it was judged to be flexible, and the evaluation was made relative to the comparative hook-and-loop fastener.

[0115] Furthermore, when the engagement strength of this hook surface fastener was measured, the initial engagement strength was 14.9 N / cm ２ , peel strength is 1.32 N / cm, engagement force after 1000 engagement / peel cycles is shear strength of 14.3 N / cm ２ The peel strength was 1.28 N / cm, and even after 1000 repeated engagement and peeling cycles, almost no hook-shaped engaging elements were found to have been pulled out from the surface of the hook surface fastener, demonstrating that this is an excellent hook surface fastener.

[0116] Furthermore, when this hook surface fastener was dyed with a disperse dye at 130°C for 1 hour, a hook surface fastener dyed a deep crimson color was obtained.Furthermore, when the surface fastener was cut across the warp and weft threads, all of the cross sections were uniformly dyed a deep color from the back to the front of the surface fastener, i.e., the binder layer, base fabric, and engaging elements of the surface fastener.

[0117] Examples 2 to 5, Comparative Example 1 Hook surface fasteners were manufactured in the same manner as in Example 1 above, except that the multifilament yarns used for the warp and weft in Example 1 were changed to the following multifilament yarns. A dyeing process was then carried out. [Warp yarns used in Example 2] Multifilament yarn made of copolymerized PET (copolymerization ratio: 1.1 mol % IPA and 2.2 mol % DEG) Melting point: 255.8°C Total decitex and number of filaments: 167 dtex, 30 filaments Dry heat shrinkage at 200°C: 21.6% [Weft yarns used in Example 2] Multifilament yarn made of copolymerized PET (copolymerization ratio: 1.1 mol % IPA and 2.2 mol % DEG) Melting point: 255.2°C Total decitex and number of filaments: 198 dtex, 48 filaments Dry heat shrinkage at 200°C: 21.8%

[0118] [Warp yarn used in Example 3] Multifilament yarn made of copolymerized PET (copolymerization ratio: 2.2 mol% IPA and 2.1 mol% DEG) Total decitex and number of filaments: 167 dtex and 30 filaments Melting point: 252.9°C Dry heat shrinkage at 200°C: 24.0% [Weft yarn used in Example 3] Multifilament yarn made of copolymerized PET (copolymerization ratio: 2.2 mol% IPA and 2.1 mol% DEG) Melting point: 252.3°C Total decitex and number of filaments: 198 dtex and 48 filaments Dry heat shrinkage at 200°C: 24.2%

[0119] [Warp yarn used in Example 4] Multifilament yarn made of copolymerized PET (copolymerization ratio: 0.7 mol% IPA and 1.5 mol% DEG) Total decitex and number of filaments: 167 dtex and 30 filaments Melting point: 258.4°C Dry heat shrinkage at 200°C: 20.6% [Weft yarn used in Example 4] Multifilament yarn made of copolymerized PET (copolymerization ratio: 0.7 mol% IPA and 1.5 mol% DEG) Melting point: 257.8°C Total decitex and number of filaments: 198 dtex and 48 filaments Dry heat shrinkage at 200°C: 20.8%

[0120] [Warp yarn used in Comparative Example 1] Multifilament yarn made of copolymerized PET (copolymerization ratio: 4.5 mol% IPA and 4.1 mol% DEG) Total decitex and number of filaments: 167 dtex and 30 filaments Melting point: 247.8°C Dry heat shrinkage at 200°C: 30.2% [Weft yarn used in Comparative Example 1] Multifilament yarn made of copolymerized PET (copolymerization ratio: 4.5 mol% IPA and 4.1 mol% DEG) Melting point: 247.2°C Total decitex and number of filaments: 198 dtex and 48 filaments Dry heat shrinkage at 200°C: 30.4%

[0121] [Warp yarn used in Example 5] Multifilament yarn made of pure PET (copolymerization ratio: IPA 0 mol%, DEG 1.4 mol%) Total decitex and number of filaments: 167 dtex and 30 filaments Melting point: 261.3°C Dry heat shrinkage at 200°C: 18.9% [Weft yarn used in Example 5] Multifilament yarn made of copolymerized PET (copolymerization ratio: IPA 0.0 mol% and DEG 1.4 mol%) Melting point: 260.7°C Total decitex and number of filaments: 198 dtex and 48 filaments Dry heat shrinkage at 200°C: 19.1%

[0122] The hook surface fastener of Comparative Example 1 frequently suffered from single thread breakage and fuzzing during the weaving process, and it was therefore found that a commercially valuable hook surface fastener could not be obtained, so the subsequent processes were not carried out. All of the hook surface fasteners obtained in the above Examples, except for Comparative Example 1, had a hook-shaped engaging element density of 45 pieces / cm ２ Furthermore, the height of the hook-shaped engaging elements from the surface of the woven fabric base was 1.5 mm.

[0123] Then, when these hook-and-loop fasteners were examined under a microscope for cross sections cut parallel to the warp and weft yarns, it was confirmed that in all hook-and-loop fasteners, the weave was closed due to thermal shrinkage of the yarns constituting the woven fabric, causing some of the resin in the layer integrated on the second surface side of the base fabric to penetrate into the base fabric, but that the resin did not seep out to the first surface side of the base fabric. Furthermore, it was confirmed that where the warp yarns and the engaging element yarns crossed the weft yarns on the first surface side of the base fabric, the warp yarns and the engaging element yarns were not bonded to the weft yarns by the PET resin integrated on the second surface of the base fabric. Furthermore, where the engaging element yarns slipped under the weft yarns on the second surface side of the base fabric, it was confirmed that the engaging element yarns were bonded to the layer by the resin constituting the layer present on the second surface side of the base fabric.

[0124] The performance of these hook-and-loop fasteners was measured. As a result, the pull-out strength of the hook-shaped engaging elements was 9.98 N / piece for Example 2, 10.22 N / piece for Example 3, 7.00 N / piece for Example 4, and 6.70 N / piece for Example 5, and although Examples 4 and 5 were inferior to Examples 2 and 3, all had practically usable pull-out strength. Furthermore, with regard to the feel of the surface of the hook-and-loop fasteners for Examples 2 and 3, the feel was soft similar to that of Example 1, but for Examples 4 and 5, all of the evaluators answered that although the overall hardness was flexible, the feel of the surface where the engaging elements were present was hard and considerably inferior to that of Example 1.

[0125] Furthermore, with regard to the engaging force, the hook-and-loop fasteners of Examples 4 and 5 both had inferior engaging force after 1,000 repeated engagement and peeling cycles, and had almost the same engaging force as Example 1, except that the hook-shaped engaging elements were observed to be pulled out from the surface of the hook-and-loop fastener after 1,000 repeated engagement and peeling cycles. Furthermore, when the dyed hook-and-loop fasteners were cut across the warp and weft threads, the cross sections of Examples 2 and 3 were uniformly dyed from the second surface to the first surface. However, with the hook-and-loop fasteners of Examples 4 and 5, a difference in density was observed between the base fabric and the resin layer on the second surface, giving the impression that a different color was integrated into the second surface side of the base fabric.

[0126] From the above results, it can be seen that hook surface fasteners using multifilament yarns made of copolymerized PET, in which IPA is copolymerized and whose melting point is within the range of 250-257°C, as warp and weft yarns, as in Examples 1 to 3, have excellent surface feel, pull-out resistance of the engaging elements, excellent dyeability, and excellent engaging force. Furthermore, Examples 4 and 5 have no problems with initial engaging force, and all of the components are formed from polyester-based resin, resulting in a hook-and-loop fastener with excellent recyclability. However, it can be seen that the surface feel is poor, and the pull-out resistance of the engaging elements, uniform dark dyeability, and engaging force are also poor. As mentioned above, Comparative Example 1 experienced single-yarn breakage and fuzz generation during the weaving process, making it impossible to form a hook-and-loop fastener. These results are shown in the table below. Note that the arrows in the tables indicate the same description as the arrows indicate, and this is common to all tables.

[0127]

[0128]

[0129] Examples 6-7, Comparative Examples 2-3 In Example 1, the following four types of IPA copolymerized PET were prepared as the PET resin to be integrated on the second surface side of the fabric tape for hook surface fasteners. Four types of binder layer-integrated hook surface fasteners were produced using each of these four PET resins in the same manner as in Example 1. The resin temperature used when integrating the resins on the second surface of the fabric for hook surface fasteners was a temperature 15°C higher than the melting point of each resin. [Example 6] IPA 16 mol% copolymerized PET (melting point: 198.4°C) [Example 7] IPA 23 mol% copolymerized PET (melting point: 171.7°C) [Comparative Example 2] IPA 28 mol% copolymerized PET (melting point: 155.0°C) [Comparative Example 3] IPA 10 mol% copolymerized PET (melting point: 220.6°C)

[0130] In the case of the hook surface fastener of Comparative Example 3, when the binder layer was integrated with the second surface of the base fabric, many of the loops for the engaging elements on the first surface side of the base fabric collapsed, peeled off from the cooling roll, and did not stand up even after heat treatment for fixing the hook shape, and it was found that a commercially valuable hook surface fastener could not be obtained, so subsequent steps were not carried out. All of the three types of hook surface fasteners obtained by the above Examples and Comparative Examples, excluding Comparative Example 3, had a hook-shaped engaging element density of 45 pieces / cm ２ The height of the hook-shaped engaging elements from the surface of the woven fabric base was 1.5 mm. Microscopic observation of these three types of hook-and-loop fasteners, including cross sections cut parallel to the warp and weft, revealed that in all cases, some of the resin in the layer integrated with the second surface of the base fabric had penetrated into the base fabric, but the weave was blocked by thermal shrinkage of the yarns constituting the woven fabric, preventing the resin from seeping out to the first surface of the base fabric. As a result, it was confirmed that where the warp and engaging element yarns crossed the weft on the first surface of the base fabric, the warp and engaging element yarns were not bonded to the weft by the PET resin integrated with the second surface of the base fabric. It was also confirmed that where the engaging element yarns slipped under the weft on the second surface of the base fabric, the engaging element yarns were bonded to the layer by the resin constituting the layer present on the second surface of the base fabric.

[0131] The performance of these three types of hook surface fasteners was measured. As a result, the pullability of the hook-shaped engaging elements was 9.98 N / piece for Example 6, 9.85 N / piece for Example 7, and 9.70 N / piece for Comparative Example 2, all of which were excellent values. However, with the hook surface fastener of Comparative Example 2, ironing during the finishing process of the textile product caused a portion of the binder layer on the second surface side of the base fabric to melt, resulting in a drop in the pullability of the hook engaging elements to 3.20 N / piece, making it unsuitable for use in textile products involving finishing processes. Furthermore, with regard to the surface feel of the hook surface fasteners, Examples 6 and 7, as well as Comparative Example 2, all had a soft feel similar to that of Example 1. Furthermore, with regard to the engaging force, all of the hook surface fasteners had excellent engaging force almost equivalent to that of Example 1. Furthermore, these three types of hook surface fasteners were subjected to high-pressure dyeing using the same disperse dye as in Example 1. As with Example 1, dyed surface fasteners were obtained that were dyed deep to the second surface of the base fabric and had uniform cross-sections, similar to that of Example 1.

[0132]

[0133] Example 8 The following yarn was prepared as a multifilament yarn for loop-shaped engaging elements, and a loop hook-and-loop fastener was produced by the following method using this multifilament yarn for loop-shaped engaging elements, the multifilament yarn for warp described in Example 1, the multifilament yarn for weft described in Example 1, and the PET resin to be integrated with the second surface of the base fabric described in Example 1. [Multifilament yarn for loop-shaped engaging elements] Multifilament yarn made of copolymerized PET (copolymerization ratio: IPA 2.2 mol % and DEG 2.1 mol %) Total decitex and number of filaments: 289 dtex and 8 filaments Melting point: 253.6°C Dry heat shrinkage at 200°C: 23.2%

[0134] [Manufacturing of Loop Hook-and-Loop Fasteners] Using the above warp yarns, weft yarns, and multifilament yarns for loop-shaped engaging elements, a plain weave was used. The weave density (after heat shrinkage) was 55 warp yarns / cm and 21 weft yarns / cm. The multifilament yarns for loop-shaped engaging elements were woven parallel to the warp yarns without crossing the warp yarns, at a ratio of 1 for every 4 warp yarns. Five weft yarns were then floated and sunk, and loops were formed on the woven fabric base. The loop hook-and-loop fastener tape woven under the above conditions was used in the same manner as in Example 1 to manufacture a woven fabric tape for loop hook-and-loop fasteners, with a binder layer integrated on the second surface of the base fabric. The surface of the hook-and-loop fastener having the loop-shaped engaging elements was then rubbed with a card cloth or the like to loosen the multifilament yarns that made up the loops. Note that the process from weaving the fabric to the process of integrating the binder layer on the second surface was carried out continuously without rewinding. Furthermore, high-pressure dyeing with a disperse dye was carried out in the same manner as in Example 1.

[0135] The density of the loop engaging elements in the obtained fabric for loop surface fasteners was 44 pieces / cm ２ The height of the loop-shaped engaging elements from the surface of the woven fabric base was 2.1 mm. Microscopic observation of cross sections of this loop hook-and-loop fastener cut parallel to the warp and weft yarns revealed that some of the resin in the layer integrated with the second surface of the base fabric had penetrated into the base fabric, but the weave was blocked by thermal shrinkage of the yarns constituting the woven fabric, preventing the resin from seeping out to the first surface of the base fabric. As a result, it was confirmed that where the warp yarns and engaging element yarns crossed the weft yarns on the first surface of the base fabric, the warp yarns and engaging element yarns were not bonded to the weft yarns by the PET resin integrated with the second surface of the base fabric. Furthermore, where the engaging element yarns slipped under the weft yarns on the second surface of the base fabric, it was confirmed that the engaging element yarns were bonded to the layer by the resin constituting the layer present on the second surface of the base fabric.

[0136] The surface feel of the obtained loop surface fastener was observed in the same manner as in Example 1. Loop surface fasteners are inherently flexible overall, and have a much softer and superior surface feel than hook surface fasteners, but all of the evaluators answered that the loop surface fastener of this example was even better in feel than a commercially available PET-based woven surface fastener (B2790R.00 manufactured by Kuraray Fastening Co., Ltd.) in which loop engaging elements are fixed by thermal fusion of weft yarns.

[0137] The pull-out force of the loop engaging element of this loop surface fastener was measured to be 16.21 N, which showed that the loop engaging element also had excellent pull-out properties. As described above, the pull-out properties of the loop engaging element were measured in a state where the multifilament yarn forming the loop engaging element formed a loop, sunk under the weft yarn, and then rose to the first surface of the base fabric, and the multifilament yarn for the loop engaging element was cut.

[0138] Furthermore, when the engagement strength of this loop hook-and-loop fastener was measured, the initial engagement strength was 14.8 N / cm ２ , peel strength is 1.50 N / cm, engagement force after 1000 engagement / peel cycles is shear strength of 14.4 N / cm ２ The peel strength was 1.44 N / cm, and the engaging force was also a satisfactory value. Even after 1000 repeated engagement and peeling cycles, no loop engaging elements were observed to have been pulled out from the surface of the loop surface fastener.

[0139] Furthermore, when this loop surface fastener was subjected to a high-pressure dyeing process using a disperse dye, it was dyed a vivid, deep crimson color, exhibiting excellent dyeability. Furthermore, when this dyed loop surface fastener was cut, the cross section was uniformly dyed a deep color from the front to the back of the loop surface fastener, i.e., all of the binder layer, base fabric, and engaging elements of the surface fastener.

[0140] Example 9 Using the warp yarns, weft yarns, and monofilament yarns for hook-shaped engaging elements described in Example 1 above, and the multifilament yarns for loop-shaped engaging elements described in Example 8, and further using a PET-based resin integrated with the second surface of the base fabric in the same manner as in Example 1, a hook-and-loop coexisting surface fastener was produced by the following method.

[0141] [Preparation of Hook-and-Loop Parallel Type Hook Fastener] A plain weave was used as the weave structure, with a weave density (after heat shrinkage treatment) of 55 warp threads / cm and 18.5 weft threads / cm. A multifilament thread for loop-shaped engaging elements or a monofilament thread for hook-shaped engaging elements was used in a ratio of one for every four warp threads. In the case of a multifilament thread for loop-shaped engaging elements, three weft threads were floated and sunk, and then the thread was crossed over one warp thread, and the thread was driven in parallel to the warp thread to form a loop at the point where the thread crossed one warp thread. In the case of a monofilament thread for hook-shaped engaging elements, three weft threads were floated and sunk, and then the thread was crossed over three warp threads, and then a loop was formed on the base fabric at the point where the threads were crossed.

[0142] In this case, the multifilament yarns for the loop-shaped engaging elements and the monofilament yarns for the hook-shaped engaging elements were woven alternately so that each yarn existed continuously in units of two. When forming the loops for the hook-shaped engaging elements, similar to Example 1, a method was used in which a plurality of metal rods were placed on the woven base fabric parallel to the warp yarns at positions where the yarns for the hook-shaped engaging elements straddled the warp yarns, and the engaging element yarns were passed over the metal rods to form loops, and after the loops were formed, the metal rods were pulled out of the loops.

[0143] A woven hook-and-loop coexisting type hook-and-loop fastener tape was manufactured by integrating a binder layer onto the second surface of the base fabric in the same manner as in Example 1, and the same heat treatment as in Example 1 was carried out to fix the shape of the hook-like engaging elements. Then, the process of cutting one leg of the loop for the hook-like engaging elements was carried out in the same manner as in Example 1, and the surface of the loop-like engaging elements was rubbed with card clothing to loosen the multifilament yarn forming the loop of the loop-like engaging elements. The process from weaving the fabric to the process of cutting one leg of the loop for the engaging elements and then loosening the loop-like engaging elements with card clothing were carried out continuously without winding up in between. Furthermore, high-pressure dyeing with a disperse dye was carried out in the same manner as in Example 1.

[0144] The density of the hook-shaped engaging elements of the obtained hook-and-loop coexisting surface fastener was 32 pieces / cm ２ , the density of the loop-shaped engaging elements is 32 pieces / cm ２ The height of the hook-shaped engaging elements from the surface of the base fabric was 1.7 mm, and the height of the loop-shaped engaging elements from the surface of the base fabric was 2.1 mm. Microscopic observation of cross sections cut parallel to the warp and weft of this hook-and-loop coexisting surface fastener revealed that some of the resin in the layer integrated with the second surface of the base fabric had penetrated into the base fabric, but the weave was blocked by thermal shrinkage of the yarns constituting the woven fabric, preventing the resin from seeping out to the first surface of the base fabric. As a result, it was confirmed that where the warp and engaging element yarns crossed the weft on the first surface of the base fabric, the warp and engaging element yarns were not bonded to the weft by the PET resin integrated with the second surface of the base fabric. Furthermore, where the engaging element yarns slipped under the weft on the second surface of the base fabric, it was observed that the engaging element yarns were bonded to the layer by the resin constituting the layer present on the second surface of the base fabric.

[0145] The feel of the surface of the hook-and-loop coexisting surface fastener thus obtained was observed in the same manner as in Example 1, and all of the evaluators answered that the hook-and-loop coexisting surface fastener of this Example was much softer and superior in feel to the touch than a commercially available PET-based woven surface fastener in which both loop-shaped engaging elements and hook-shaped engaging elements coexist on the first surface and these engaging elements are fixed by thermal fusion of the weft yarns (F9820Y.00 manufactured by Kuraray Fastening Co., Ltd.).The overall hardness was also evaluated to be flexible.

[0146] The pull-out force of the hook-shaped engaging elements of this surface fastener was measured and found to be 7.61 N / piece, which proved to be excellent in pull-out resistance for a hook-and-loop compatible surface fastener. Furthermore, when the engagement force of this hook-and-loop compatible surface fastener was measured, the initial engagement force was 10.3 N / cm in shear strength. ２ , peel strength is 1.42 N / cm, engagement force after 1000 engagement / peel cycles is shear strength of 9.0 N / cm ２ The peel strength was 1.29 N / cm, which means that the fastener has excellent engagement strength as a hook-and-loop combined surface fastener. Even after repeated engagement and peeling 1,000 times, no hook-shaped engaging elements or loop-shaped engaging elements were found to have been pulled out of the woven base fabric.

[0147] When this hook-and-loop coexisting surface fastener was dyed with a crimson disperse dye in the same manner as in the examples, a vivid surface fastener dyed uniformly in a deep crimson color was obtained, and it was found to have extremely excellent dyeability. Furthermore, when the surface fastener after dyeing was cut and the cross section was observed, it was found that the surface was uniformly dyed in a deep color from top to bottom, that is, the binder layer, base fabric, and engaging elements of the surface fastener. Furthermore, even when the surface of the hook-shaped engaging elements was lightly rubbed with sandpaper, the undyed inner layer was not exposed.

[0148] Comparative Example 4 In the above-mentioned Example 1, the PET-based multifilament yarn used as the weft yarn was replaced with a multifilament yarn made of the following core-sheath type composite filament, and a method was used in which a layer made of a PET-based resin was integrated onto the second surface of the loop fabric.Then, a heat treatment was carried out for 60 seconds at 210°C, which is the temperature at which the sheath component of the multifilament yarn made of the core-sheath type composite filament used for the weft yarn melts, thereby melting the sheath component of the weft yarn and bonding and fixing the warp yarn and the engaging element yarn, thereby producing a hook surface fastener.

[0149] [Weft: multifilament yarn consisting of core-sheath composite filaments] Core component: non-copolymerized PET Sheath component: 25 mol% isophthalic acid copolymerized PET (softening point: 190.0°C) Core-sheath ratio (weight ratio): 70:30 Total decitex and number of filaments: 198 dtex and 48 filaments Dry heat shrinkage at 200°C: 16.2%

[0150] The obtained hook surface fastener was cut parallel to the weft to observe the adhesion state of the warp yarns and the engaging element yarns to the weft. As a result, it was confirmed that at the points where the warp yarns and the engaging element yarns crossed the weft yarns on the first surface side of the base fabric, the warp yarns and the engaging element yarns were completely adhered to the weft yarns by the sheath component of the weft yarn. As a result, there were no problems with the pull-out resistance of the hook-shaped engaging elements, but as for the feel of the surface of this hook surface fastener, the results of an evaluation by 13 evaluators in the same way as in Example 1, all 13 evaluators rated the hook surface fastener of this comparative example as being harder than that of Example 1 and as being inferior in feel and flexibility.

[0151] Comparative Example 5 In Example 1, the PET multifilament yarn used as the warp yarn, the multifilament yarn used as the weft yarn, and the monofilament yarn used as the engaging element yarn were changed to the yarns shown below, and the warp and weft yarns were woven at a weave density of 55 warp threads / cm and 19 weft threads / cm. Furthermore, the weight of the binder layer integrated on the second surface of the loop woven fabric was set to 120 g / m, which is approximately twice that of Example 1. ２ A hook surface fastener was produced in the same manner as in Example 1 except that:

[0152] [Warp] Multifilament yarn made of PET (non-copolymer) Total decitex and number of filaments: 167 dtex, 30 filaments Melting point: 261.0°C Dry heat shrinkage at 200°C: 18.8% [Weft] Multifilament yarn made of PET (non-copolymer) Total decitex and number of filaments: 198 dtex, 48 filaments Melting point: 261.0°C Dry heat shrinkage at 200°C: 19.0% [Monofilament yarn for hook-shaped engaging element] Monofilament yarn made of PET (non-copolymer) Diameter: 0.23 mm Melting point: 261.4°C Dry heat shrinkage at 200°C: 18.0%

[0153] The obtained hook surface fastener was rigid, and by cutting this hook surface fastener parallel to the weft, the adhesion state of the warp yarns and the engaging element yarns to the weft yarn and the penetration state of the binder layer integrated on the second surface side into the base fabric were observed. As a result, it was confirmed that the PET-based resin integrated on the second surface of the base fabric had penetrated the weave of the base fabric and flowed out to the first surface of the base fabric, thereby completely adhering to the weft yarn at the points where the warp yarns and the engaging element yarns crossed the weft yarn on the first surface side of the base fabric. The feel of the surface of this hook surface fastener was evaluated in the same manner as in Example 1, and all 13 evaluators evaluated that the hook surface fastener of this comparative example was much harder than that of Example 1 and was significantly inferior in terms of feel and flexibility.

[0154]

[0155] While the preferred embodiments of the present invention have been described above with reference to the drawings, those skilled in the art will readily recognize various changes and modifications within the scope of the present invention upon reading the specification. Accordingly, such changes and modifications are to be interpreted as falling within the scope of the invention as defined by the claims.

[0156] 1: Weft yarn 2: Warp yarn 3: Hook-shaped engaging element 4: Loop-shaped engaging element 5: Woven base fabric 6: Layer made of resin (A) 7: Hole provided in layer made of resin (A) 8: Depression 9: Portion where engaging element thread is tucked under weft yarn 10: Loop fabric for hook-and-loop fastener T: T-die R1: Cooling roll R2: Press roll R3: Backup roll R4: Sweeper roll

Claims

1. A woven hook-and-loop fastener is provided, with a base fabric made of warp threads, weft threads, and threads for engaging elements, the first surface of the base fabric being the front side and the second surface being the back side, the threads for engaging elements being woven into the base fabric parallel to the warp threads, and the first surface of the base fabric having numerous hook-shaped and / or loop-shaped engaging elements formed from the threads for engaging elements and rising from the first surface of the base fabric, wherein the warp threads, weft threads, and threads for engaging elements are all made of polyethylene terephthalate resin, and the following configurations 1) and 2): 1) A binder layer is provided on the second surface of the base fabric, which is copolymerized with isophthalic acid and is made of a polyethylene terephthalate resin with a melting point of 160 to 210°C, and the thread for the engaging element is directly bonded and fixed by the resin of the binder layer. and 2) The first surface of the base fabric does not contain the resin of the binder layer. A polyethylene terephthalate woven fabric hook-and-loop fastener that satisfies both requirements.

2. A woven hook-and-loop fastener is provided, with a base fabric made of warp threads, weft threads, and threads for engaging elements, the first surface of the base fabric being the front side and the second surface being the back side, the threads for engaging elements being woven into the base fabric parallel to the warp threads, and the first surface of the base fabric having numerous hook-shaped and / or loop-shaped engaging elements formed from the threads for engaging elements and rising from the first surface of the base fabric, wherein the warp threads, weft threads, and threads for engaging elements are all made of polyethylene terephthalate resin, and the following configurations 1) and 2): 1) A binder layer made of polyethylene terephthalate resin copolymerized with isophthalic acid and having a melting point of 160 to 210°C is provided on the second surface of the base fabric, a portion of the resin of the binder layer penetrates into the interior of the base fabric, and the portion of the engagement element threads that are embedded beneath the weft threads on the second surface of the base fabric is bonded substantially entirely by the resin constituting the binder layer, and 2) In the first surface of the base fabric, where the warp threads and threads for the engaging elements cross over the weft threads, the warp threads and threads for the engaging elements are not adhered to the weft threads. A polyethylene terephthalate woven fabric hook-and-loop fastener that satisfies both requirements.

3. The polyethylene terephthalate woven hook-and-loop fastener according to claim 1 or 2, wherein at least one of the warp and weft threads is a yarn made of a polyethylene terephthalate resin copolymerized with isophthalic acid and having a melting point of 250 to 257°C.

4. The polyethylene terephthalate woven hook-and-loop fastener according to claim 1 or 2, wherein the thread for the engaging element is a thread made of a polyethylene terephthalate resin copolymerized with isophthalic acid and having a melting point of 250 to 265°C.

5. The polyethylene terephthalate-based woven hook-and-loop fastener according to claim 1 or 2, wherein the warp threads, weft threads, and threads for the engaging element are all made of a copolymerized polyethylene terephthalate resin containing 1.0 to 2.0 mol% isophthalic acid and 2.0 to 3.5 mol% diethylene glycol as copolymer components based on the total amount of dicarboxylic acid.

6. The polyethylene terephthalate woven fabric hook-and-loop fastener according to claim 1 or 2, wherein a binder layer adhered to the second surface of the base fabric has a number of holes that penetrate the layer in the thickness direction.

7. A textile product with a polyethylene terephthalate-based woven hook-and-loop fastener, wherein the polyethylene terephthalate-based woven hook-and-loop fastener described in claim 3 is attached to a textile product made of polyethylene terephthalate-based resin and dyed in the same color as the textile product using the same disperse dye.

8. A method for manufacturing a woven hook-and-loop fastener, characterized in that the following steps A, B, and C are performed in this order, the woven fabric being a base fabric composed of warp threads made of polyethylene terephthalate resin copolymerized with isophthalic acid, and weft threads and threads for engaging elements made of polyethylene terephthalate resin, the first surface of the base fabric being the front side and the second surface being the back side, the threads for engaging elements being woven into the base fabric parallel to the warp threads, the first surface of the base fabric having numerous hook-shaped and / or loop-shaped engaging elements formed from the threads for engaging elements and rising from the first surface of the base fabric, and the second surface of the base fabric having a binder layer made of polyethylene terephthalate resin copolymerized with isophthalic acid and having a melting point of 160 to 210°C. [Process A] A process in which, when weaving a fabric from warp and weft threads, the threads for the engaging element are woven parallel to the warp threads, and at the points where they cross the weft threads, the threads for the engaging element are made to rise up in a regular loop shape from the first surface of the base fabric, thereby weaving a loop fabric. [Step B] A step of applying the binder layer resin to the second surface of the base fabric and bonding and fixing the engagement element yarn with the binder layer resin. [Step C] If the loop is made of monofilament yarn, the first side of the loop fabric is heated to fix the loop shape, then cooled, and one leg of the loop is cut to make the loop a hook-shaped engaging element.

9. The method for manufacturing a polyethylene terephthalate woven hook-and-loop fastener according to claim 8, wherein step B is a step in which the binder layer resin is attached to the second surface of the loop fabric in a molten state as a film, directly pressed against it, and the loop fabric is densified, causing a portion of the film to penetrate into the interior of the second surface of the base fabric, and then the molten resin is cooled and solidified to bond it with the threads for the engaging element.

10. The method for manufacturing a polyethylene terephthalate woven hook-and-loop fastener according to claim 9, wherein the film-like material made of the binder layer resin is obtained by heating and melting a fiber sheet.

11. A method for manufacturing a polyethylene terephthalate woven hook-and-loop fastener according to any one of claims 8 to 10, wherein at least one yarn selected from the group consisting of warp yarns, weft yarns, and yarns for engaging elements is a yarn made of a polyethylene terephthalate resin copolymerized with isophthalic acid and having a melting point of 250 to 265°C.

12. A method for producing a polyethylene terephthalate-based woven hook-and-loop fastener according to any one of claims 8 to 10, wherein the warp threads, weft threads, and threads for the engaging element are all made of a copolymerized polyethylene terephthalate resin containing 1.0 to 2.0 mol% isophthalic acid and 2.0 to 3.5 mol% diethylene glycol as copolymer components relative to the total amount of dicarboxylic acid.

13. A method for manufacturing a polyethylene terephthalate woven hook-and-loop fastener according to any one of claims 8 to 10, wherein the dry heat shrinkage rate at 200°C of the yarn made of polyethylene terephthalate resin used as the warp, weft, and thread for the engaging element is in the range of 10 to 35%.

14. A method for manufacturing a polyethylene terephthalate woven hook-and-loop fastener according to any one of claims 8 to 10, wherein through holes are made in the binder layer.

15. A method for manufacturing a textile product with a polyethylene terephthalate-based woven hook-and-loop fastener, comprising attaching the polyethylene terephthalate-based woven hook-and-loop fastener described in claim 3 to a textile product made of polyethylene terephthalate-based resin, and simultaneously dyeing it the same color using a disperse dye while the fastener is attached.

Images