Polyester-based woven hook-and-loop fastener and method for producing same

Abstract

The invention relates to a polyester woven hook-and-loop fastener, which takes a fabric as a fabric base cloth, the fabric takes polyethylene glycol terephthalate multifilament yarns as warp yarns and takes polyester hot-melt adhesive multifilament yarns as weft yarns, and the polyester woven hook-and-loop fastener is formed by weaving the polyester woven hook-and-loop fastener. A yarn for hooking elements, which is composed of at least one type of yarn selected from the group consisting of monofilament yarns of polyethylene terephthalate and multifilament yarns of polyester, is woven into the fabric base cloth in parallel with the warp yarns, and a plurality of hooking elements, which are composed of the yarn for hooking elements and stand up from the surface of the fabric base cloth, are present on the surface of the fabric base cloth. The hooking element is composed of at least one element selected from the group consisting of a hook shape and a loop shape, the root of the hooking element is fixed to the woven fabric base cloth by a melt-cured product of a hot-melt adhesive component of the polyester-based hot-melt adhesive multifilament yarn, and the polyethylene terephthalate-based multifilament yarn is composed of copolymerized polyethylene terephthalate. The copolymerized polyethylene terephthalate contains isophthalic acid in an amount of 1.0-2.0 mol% relative to the total amount of dicarboxylic acid and diethylene glycol in an amount of 2.0-3.5 mol% relative to the total amount of dihydric alcohol as copolymerization components.

Description

Technical Field

[0001] The present invention relates to a fabric-type woven hook and loop fastener (hereinafter, sometimes also referred to as hook and loop fastener), the warp yarn of which is formed by polyethylene terephthalate (hereinafter, sometimes also referred to as PET)-type yarn, and polyester-type hot-melt adhesive multifilament yarn is used as the weft yarn. The root of the hook element is fixed to the fabric base fabric of the hook and loop fastener by melting the hot-melt adhesive multifilament yarn. Even if the hooking / peeling is repeated, the hook-shaped hook element is not easily pulled out from the fabric base fabric. The hook element is fixed to the fabric base fabric in a manner that it is not pulled out, and can be easily dyed into a dark color with disperse dyes. Moreover, the present invention relates to a polyester fabric hook and loop fastener and a method for manufacturing the same, which preferably, on the basis of satisfying the above-mentioned excellent pull-out resistance and dyeability, further has the condition that in the heat treatment process for melting the above-mentioned hot-melt adhesive multifilament yarn, the yarn constituting the hook and loop fastener undergoes less uneven heat shrinkage, resulting in less undulation in the upper and lower directions of the hook and loop fastener. By reducing the undulation, when the hook element is a hook-shaped hook element, the single-leg cutting position is constant, and when the hook element is a loop-shaped hook element, the hook force is uniform due to the less undulation. Background Art

[0002] In the past, as a Velcro having a fabric base fabric, a combination of a so-called fabric hook Velcro and a so-called fabric loop Velcro has been widely used in clothing, daily necessities and other applications because the hooking elements are less damaged and the hooking force is less reduced even after repeated hooking / peeling. The fabric hook Velcro has a plurality of hook-shaped hooking elements formed by monofilament yarn on the surface of the fabric base fabric, and the fabric loop Velcro can be hooked with the hook-shaped hooking elements, and has a plurality of loop-shaped hooking elements formed by multifilament yarn on the surface of the fabric base fabric.

[0003] In addition, for the so-called hook / loop coexisting type fabric fastener in which a plurality of the above-mentioned hook-shaped hooking elements and loop-shaped hooking elements are present on the same surface of the fabric base cloth, it is possible to combine the functions of both hook fastener and loop fastener in one fastener. Therefore, there is no need to use a combination of hook fastener and loop fastener like the existing fastener, and it is therefore widely used.

[0004] For such a fabric-based hook and loop fastener, when the fabric base is woven, the hook element yarn is woven into the fabric base in parallel with the warp yarn, and the hook element yarn is woven in a loop shape from the surface of the fabric base at various places, and then heat is applied to fix the loop shape. In the case where the hook element is a hook-shaped hook element, one leg of the loop is cut off to make the loop into a hook-shaped hook element. In addition, in the case where the hook element is a loop-shaped hook element, one leg is not cut off to manufacture. In order to prevent the hook element yarn woven into the fabric base formed by the warp yarn and the weft yarn in parallel from being pulled out of the fabric base due to the tensile force when the hook is peeled off, a urethane resin agent or an acrylic resin agent called a back-coated adhesive is usually applied to the back of the fabric base.

[0005] However, if a back-coated adhesive liquid is applied to the back of a fabric base cloth and then dried, the organic solvent used in the adhesive liquid deteriorates the operating environment, and when the organic solvent is recovered, a device for the recovery is required, and a process, device, and time are required for drying the adhesive liquid. As a result, productivity is reduced, and the adhesive attached to the device during the application / drying process needs to be removed regularly, which also reduces productivity.

[0006] In addition, the Velcro coated with a back-coated adhesive liquid will lose the softness of the fabric base fabric due to the adhesive layer on the back of the fabric base fabric and easily become rigid. Therefore, there are also disadvantages that the soft feel of the fabric to which the Velcro is installed is reduced, and the air permeability of the Velcro is reduced due to the adhesive layer.

[0007] In addition, when the back-coated adhesive liquid is applied to the back of the fabric base cloth, if such a fabric hook and loop fastener is dyed, the dye liquid cannot penetrate the fabric base cloth due to the adhesive layer present on the back of the fabric base cloth, and therefore, it is impossible to dye it evenly into a dark color. Therefore, dyeing must be performed before the back-coated adhesive liquid is applied. If dyeing is performed before the back-coated adhesive liquid is applied, dyeing is performed in a state where the hooking element yarn, etc., is not fixed to the fabric base cloth, and therefore, during the dyeing process, the yarn constituting the fabric base cloth will shift and move, and the arrangement of the hooking element will be disordered. In addition, when the hooking element is a hook-shaped hooking element, if the arrangement of the hooking element loop is disordered, then when one leg of the hooking element loop is cut off to make a hook-shaped hooking element, it is difficult to reliably cut off only one leg, and there are situations where both legs are cut off, both legs are not cut off, or only one leg is cut off in the middle.

[0008] In addition, in the case of Velcro with a back-coated adhesive layer on the back, it must be dyed during the manufacturing process. Therefore, in order to quickly respond to the user's color requirements, Velcro of multiple shades must be prepared in advance, which naturally increases the inventory, and its storage and management require personnel and expenses.

[0009] As a hook and loop fastener that eliminates the problems of such hook and loop fasteners with a back-coated adhesive layer, Patent Document 1 describes a hook and loop fastener that is composed of warp yarns, weft yarns including hot-melt adhesive multifilament yarns, and yarns for hooking elements, wherein polyester yarns are used as the warp yarns, weft yarns, and yarns for hooking elements, and the yarns for hooking elements are fixed to a fabric base fabric by melting the hot-melt adhesive multifilament yarns used as the weft yarns and heat shrinkage of these yarns.

[0010] In addition, Patent Document 2 also describes a combination of a hook fastener and a loop fastener, in which, in the hook fastener, a plurality of hook-shaped hook elements formed by yarns for hook-shaped hook elements made of PET woven parallel to the warp yarns stand up on one side of a fabric base fabric formed by polyester warp yarns and polyester weft yarns, and the roots of the hook-shaped hook elements are fixed to the fabric base fabric by melting the hot-melt adhesive multifilament yarn used as the weft yarn, and in the loop fastener, a plurality of loop-shaped hook elements formed by yarns for loop-shaped hook elements of polybutylene terephthalate (hereinafter referred to as PBT) woven parallel to the warp yarns stand up on one side of a fabric base fabric formed by polyester warp yarns and polyester weft yarns, and the roots of the loop-shaped hook elements are fixed to the fabric base fabric (hereinafter sometimes also referred to as the base fabric) by melting the hot-melt adhesive multifilament yarn used as the weft yarn.

[0011] Indeed, the above-mentioned problems caused by the use of a back-coated adhesive liquid can be eliminated by using the method of fixing the root of the hook element using a hot-melt adhesive multifilament yarn as described in these patent documents. However, the fixing of the root of the hook element using a hot-melt adhesive multifilament yarn is insufficient, and in order to compensate for the fixing of the root of the hook element, these patent documents describe a method of using yarns that shrink at high temperatures as warp yarns, weft yarns, and hook element yarns constituting the hook and loop fastener, and fastening the root of the hook element to the base fabric by heat shrinkage of the warp yarns, weft yarns, and hook element yarns.

[0012] However, it is found that the fixing of the hook element by melting the hot-melt adhesive multifilament yarn and by heat shrinking the warp yarn, weft yarn and hook element yarn described in these documents is still insufficient, and after repeated hooking / peeling, the fixing of the hook element is released and the hook element is pulled out from the surface of the hook fastener. It is also found that if the heat shrinkage of the yarn constituting the fabric is increased in order to prevent the hook element from being pulled out from the fabric surface, the softness of the fabric hook fastener will be impaired, and the softness of the hook fastener obtained with great difficulty by not providing a back-coating resin layer on the back surface will also be reduced.

[0013] In addition, it was found that although such polyester fasteners can be dyed with disperse dyes, the dye cannot fully reach the inside of the yarn constituting the fastener base fabric due to the shrinkage of the yarn constituting the fastener after such dyeing. If the fastener is cut, the insufficiently dyed cross-section will be exposed. In particular, with regard to the hook-shaped hooking elements, after repeated hooking and peeling, the surface of the monofilament yarn will wear and peel off, exposing the basically undyed inner layer, resulting in the phenomenon that the whitish hooking elements on the surface of the fastener are conspicuous.

[0014] Prior art literature

[0015] Patent Literature

[0016] Patent Document 1: International Publication No. 2005 / 122817

[0017] Patent Document 2: Japanese Patent Application Publication No. 2013-244139 Summary of the invention

[0018] Problems to be solved by the invention

[0019] The present inventors aim to provide a polyester fabric hook and loop fastener which can improve the above-mentioned problems of a fabric-based hook and loop fastener obtained by melting the hot-melt adhesive multifilament yarn used as the weft yarn described in the above-mentioned patent document and fixing the hooking element yarn to the fabric base fabric of the hook and loop fastener, and which can improve the above-mentioned problems of a fabric-based hook and loop fastener which is ...

[0020] In addition, the purpose is to provide a polyester woven hook and loop fastener without a back-coated adhesive, preferably in which the hook and loop fastener has less undulation in the vertical direction due to uneven shrinkage of the yarn constituting the hook and loop fastener during the heat treatment process for melting the above-mentioned hot-melt adhesive multifilament yarn and the dyeing process of the hook and loop fastener.

[0021] Solutions to the problem

[0022] That is, the present invention relates to a polyester woven hook and loop fastener, which uses a fabric as a fabric base fabric, wherein the fabric uses a PET-based multifilament yarn as a warp yarn and a polyester-based hot-melt adhesive multifilament yarn as a weft yarn, and a hook element yarn consisting of at least one selected from a PET-based monofilament yarn and a polyester-based multifilament yarn is woven into the fabric base fabric in parallel with the warp yarn, and a plurality of hook elements formed by the hook element yarn and standing up from the surface of the fabric base fabric are present on the surface of the fabric base fabric, and the hook elements are selected from hook-shaped and The invention relates to a method for preparing a polyester-based heat-sensitive adhesive multifilament yarn having at least one loop-shaped structure, wherein the root of the hooking element is fixed to the fabric base fabric by a molten solidified product of the heat-sensitive adhesive component of the polyester-based heat-sensitive adhesive multifilament yarn, and the PET-based multifilament yarn is composed of copolymerized PET, and the copolymerized PET contains 1.0 to 2.0 mol % of isophthalic acid (hereinafter, sometimes abbreviated as IPA) relative to the total amount of dicarboxylic acids and 2.0 to 3.5 mol % of diethylene glycol (hereinafter, sometimes abbreviated as DEG) relative to the total amount of diols as copolymer components.

[0023] Furthermore, it is preferable that, in such a polyester woven hook and loop fastener, when the hook element yarn is a monofilament yarn, the hook element formed by the monofilament yarn is a hook-shaped hook element, and when the hook element yarn is a multifilament yarn, the hook element formed by the multifilament yarn is a loop-shaped hook element. Furthermore, it is preferable that, when the hook element yarn is a monofilament yarn, the monofilament yarn is composed of copolymerized PET containing 1.0 to 2.0 mol% of IPA relative to the total amount of dicarboxylic acid and 2.0 to 3.5 mol% of DEG relative to the total amount of diol as copolymer components. Furthermore, it is preferable that, when the hook element is a multifilament yarn, a multifilament yarn composed of PET-based or PBT-based polyester is used as the multifilament yarn.

[0024] Moreover, the following situation is preferred: in such a polyester woven hook and loop fastener, the fabric base fabric satisfies: the warp yarn thickness in the fabric base fabric thickness direction at the part where the warp yarns that sandwich the weft yarns and bulge / sink up and down are most deeply sunken on the back side is less than 0.94 times the warp yarn thickness in the fabric base fabric thickness direction at the part that bulges most on the surface side.

[0025] Furthermore, it is preferable that the polyester-based woven surface fastener is dyed with a disperse dye.

[0026] The present invention also relates to a method for producing a woven hook and loop fastener, wherein the woven hook and loop fastener uses a fabric as a fabric base fabric, wherein the fabric uses a polyethylene terephthalate-based multifilament yarn as a warp yarn and a polyester-based hot-melt adhesive multifilament yarn as a weft yarn, wherein a hook element yarn consisting of at least one selected from a polyethylene terephthalate-based monofilament yarn and a polyester-based multifilament yarn is woven into the fabric base fabric in parallel with the warp yarn, wherein a plurality of hook elements formed by the hook element yarn and rising from the fabric base fabric surface are present on the fabric base fabric surface, wherein the hook elements consist of at least one selected from a hook shape and a loop shape, wherein the method sequentially performs the following steps A, B, and D, and uses the multifilament yarn consisting of copolymerized PET as a warp yarn, wherein the copolymerized PET contains, as copolymer components, 1.0 to 2.0 mol % of IPA relative to the total amount of dicarboxylic acid and 2.0 to 3.5 mol % of DEG relative to the total amount of diol,

[0027] [Step A] When weaving a base fabric from warp yarns and weft yarns, a hooking element yarn is woven in parallel with the warp yarns and at the same time, the hooking element yarn is made to stand up regularly in a loop shape from the surface of the base fabric to weave a loop fabric;

[0028] [Step B] a step of introducing the loop fabric into a heating zone, heating it to a temperature above the melting point of the hot-melt component of the polyester hot-melt multifilament yarn, and fixing the rising portion of the loop to the fabric base fabric by the molten material from the polyester hot-melt multifilament yarn;

[0029] [Step D] When the loop is composed of a monofilament yarn, one leg of the loop is cut off to form the loop into a hook-shaped hooking element;

[0030] Furthermore, it is preferred that in such a method for manufacturing a polyester woven hook and loop fastener, when the hook element yarn is a monofilament yarn, a monofilament yarn composed of copolymerized PET is used, wherein the copolymerized PET contains 1.0 to 2.0 mol % of IPA relative to the total amount of dicarboxylic acid and 2.0 to 3.5 mol % of DEG relative to the total amount of diol as copolymer components. Furthermore, it is preferred that when the hook element yarn is a multifilament yarn, the multifilament yarn is composed of PET or PBT polyester.

[0031] Furthermore, in such a method for producing a polyester-based woven surface fastener, it is preferable that the following step C is performed between the above-mentioned step B and the above-mentioned step D.

[0032] [Step C] A step of taking out the base fabric from the heating zone of step B and pressing the back side of the base fabric against a fixed surface or a roller surface while the hot-melt component of the polyester hot-melt multifilament yarn is melted.

[0033] It is further preferred that in such a method for manufacturing a polyester woven hook and loop fastener, the above-mentioned [Step C] is performed by the following method: while pressing the back side of the fabric base fabric to a fixed surface, sliding the fabric base fabric on the fixed surface, and advancing the fabric base fabric, and changing the advancing direction of the fabric base fabric on the fixed surface. In addition, the fabric base fabric taken out from [Step B] is not temporarily cooled, and the above-mentioned [Step C] is performed at a temperature lower than the temperature of [Step B] by utilizing the residual heat of [Step B] after [Step B].

[0034] Furthermore, it is preferable that the polyester woven surface fastener obtained by the method for producing a polyester woven surface fastener in this manner is dyed with a disperse dye to produce a dyed polyester woven surface fastener.

[0035] Effects of the Invention

[0036] Compared with the PET-type multifilament yarn constituting the warp yarn in the existing hook and loop fastener, in the woven hook and loop fastener of the present invention, the PET-type multifilament yarn constituting the warp yarn (sometimes also simply referred to as PET-type multifilament yarn) is formed by the following PET, in which a specific amount of IPA is copolymerized as a part of the dicarboxylic acid constituting PET, and further, a larger amount of DEG than the amount produced in the usual PET polymerization is copolymerized as a part of the diol component constituting PET.

[0037] That is, the PET-based yarns (multifilament yarns and monofilament yarns) that constitute existing hook and loop fasteners are usually obtained by using terephthalic acid as a dicarboxylic acid and ethylene glycol as a diol, and melting a PET homopolymer obtained by polycondensing these dicarboxylic acids and diols, extruding from a nozzle, stretching, and heat-treating (heat-setting). Unless there is a special reason, IPA will not be copolymerized in such yarns. Moreover, DEG will naturally be produced during the polymerization, but its amount is about 1 to 1.5 mol% relative to the total amount of diols.

[0038] In contrast, the PET-based multifilament yarns forming the warp yarns constituting the Velcro tape of the present invention contain a specific amount of IPA as a copolymer component and, in addition, contain a greater amount of DEG than the naturally occurring amount. By constituting the warp yarns with such special yarns, the hot melt adhesion and the bonding force brought by the hot melt adhesion can be improved, the root of the hook-shaped hooking element is firmly fixed to the fabric base fabric, and even if the hooking / peeling is repeated, the hook-shaped hooking element is not easily pulled out from the Velcro tape base fabric.

[0039] Furthermore, by constituting the warp yarn with such a special yarn, the yarn can be greatly shrunk in the thermal fusion treatment step, and from this point of view, the hook element yarn can be firmly fixed to the base fabric by the fusible component.

[0040] In addition, by using such a special PET-based multifilament yarn in the warp yarn, the inner part of the multifilament yarn can be uniformly dyed in a dark color by a general dyeing process using disperse dyes, and when the dyed hook and loop fastener is cut and used, the cross section of the hook and loop fastener is uniformly dyed in a dark color, so that a woven hook and loop fastener with excellent appearance can be obtained. In particular, in the case of a thick monofilament yarn for hook-shaped hook elements, the effect of being able to be dyed in a dark color is greater.

[0041] If IPA and PET are copolymerized, as the copolymerization amount of IPA increases, the dyeability of the hook and loop fastener obtained by using such IPA copolymerized PET in the warp yarn and the pull-out resistance of the hook and loop fastener are improved. On the contrary, if the copolymerization amount increases, the warp yarn is prone to single yarn breakage and fuzzing when weaving the hook and loop fastener, resulting in difficulty in obtaining a hook and loop fastener with commercial value. In addition, if PET yarn containing DEG in an amount greater than the amount naturally generated in a normal polycondensation reaction is used as the warp yarn, the single yarn breakage and fuzzing of the warp yarn can be suppressed.

[0042] Moreover, in the case where the woven Velcro of the present invention is a Velcro with hook-like hooking elements, not only the warp yarn but also the PET-type monofilament yarn obtained by copolymerizing the IPA amount and DEG amount specified in the present invention is used as the yarn for the hook-like hooking elements, thereby obtaining a Velcro with hook-like hooking elements in which the effect of the present invention is further improved.

[0043] Moreover, generally speaking, if a yarn with a high heat shrinkage rate is used, the obtained hook and loop fastener is easily subjected to uneven shrinkage in the hot melt bonding process, and as a result, the hook and loop fastener is easily raised / sunk (so-called ups and downs) in the vertical direction. The ups and downs of the hook and loop fastener caused by the uneven shrinkage may lead to uneven hooking force in the case of the loop fastener. In particular, in the case of the hook fastener, it is difficult to reliably cut off a certain part of one leg of the hook-shaped hook-engaging element with a loop to make a hook-shaped hook-engaging element.

[0044] In addition, for the Velcro tape with ups and downs in the vertical direction, in the conventional high temperature and high pressure dyeing process using disperse dyes, it is easy to produce the problem of the deviation of the dyeing liquid and it is difficult to obtain the dyeing product uniformly dyed into a dark color. In particular, the woven Velcro tape of the present invention uses a high shrinkage yarn in the warp yarn, etc. in order to highly prevent the hook element from being pulled out, so it is easy to have ups and downs in the vertical direction. However, in the present invention, by performing the above-mentioned process C immediately after the hot melt bonding process B, the ups and downs problem caused by uneven shrinkage is eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1This is a diagram schematically showing an example of a heat treatment apparatus used in a heat treatment preferably utilized when producing the woven surface fastener of the present invention.

[0046] Figure 2 This is a diagram schematically showing a cross section of a surface parallel to the warp yarns of the woven surface fastener of the present invention when the [Step C] is performed.

[0047] Figure 3 This is a diagram schematically showing a cross section of a surface parallel to the warp yarn of a woven surface fastener fabric base fabric when [Step C] is not performed.

[0048] Explanation of symbols

[0049] 1: Fabric base

[0050] 2: Loop for hook-shaped hooking elements

[0051] 3: Heat treatment furnace

[0052] 4: Fixed surface or roller surface

[0053] 5: Warp

[0054] 6: Weft

[0055] 7: Hook-shaped hook element

[0056] Tb: The thickness of the warp yarn in the base fabric thickness direction at the part that sinks most to the back side

[0057] Ts: The thickness of the warp yarn in the base fabric thickness direction at the most raised part on the surface side DETAILED DESCRIPTION

[0058] The present invention is described in detail below. First, the polyester woven hook fastener with hook-shaped hook elements of the present invention can be roughly divided into the following three types: a hook fastener with only hook-shaped hook elements on the surface of a fabric base fabric, a loop fastener with only loop-shaped hook elements on the surface of a fabric base fabric, and a hook / loop coexistent type fastener with both hook-shaped hook elements and loop-shaped hook elements on the surface of a fabric base fabric.

[0059] Among them, the hook fastener is mainly formed by monofilament yarn for hook-shaped hook elements, multifilament yarn for warp and multifilament yarn for weft. In addition, the loop fastener is mainly formed by multifilament yarn for loop hook elements, multifilament yarn for warp and multifilament yarn for weft. In addition, the hook / loop coexistence type fastener in which the hook-shaped hook elements and the loop-shaped hook elements coexist on the same surface is mainly formed by monofilament yarn for hook-shaped hook elements, multifilament yarn for loop-shaped hook elements, multifilament yarn for warp and multifilament yarn for weft. Moreover, in these fasteners, if it is a small amount, yarns other than these can be woven into as needed, or they can not be woven into.

[0060] In the present invention, the warp yarn and the weft yarn need to be substantially composed of polyester polymers for the following reasons: it can prevent the woven hook and loop fastener using polyamide fibers from undulating due to water absorption / moisture absorption; and the yarns can be firmly joined to each other by hot melt bonding; and the yarns can be prevented from yellowing during the hot melt bonding process; in addition, polyester fibers are used in clothes, daily groceries, etc., and when these products are dyed, the hook and loop fastener after installation can also be dyed to the same color at the same time; etc. From this point of view, the warp yarn, the weft yarn, and the hook element yarn are preferably substantially composed of polyester resins.

[0061] Specifically, in order to achieve the above requirements to a high degree, multifilament yarns made of PET are used for the warp yarns, and monofilament yarns made of PET are preferably used for the hook-shaped hook element yarns, and multifilament yarns made of PET or PBT-type polyesters are preferably used for the loop-shaped hook element yarns, and multifilament yarns made of PBT-type polyesters are more preferably used, and polyester-type multifilament yarns are also used for the weft yarns.

[0062] The warp yarn is a PET yarn formed of a polymer having ethylene terephthalate units as main repeating units. In the present invention, the warp yarn is a yarn composed of copolymerized PET, which is a polymer obtained by condensing terephthalic acid and ethylene glycol and adding specific amounts of IPA and DEG as copolymerization components. The content of IPA is 1.0 to 2.0 mol% relative to the total amount of dicarboxylic acids, and the content of DEG is 2.0 to 3.5 mol% of the total amount of diols constituting the obtained copolymerized PET.

[0063] When the copolymerization amount of IPA is within the above range, the adhesive force caused by hot melt bonding and heat shrinkage will not be reduced, the root of the hook-shaped hooking element will be firmly fixed to the fabric base fabric, and it is not easy for the hook-shaped hooking element to be pulled out from the Velcro base fabric due to repeated hooking / peeling. In addition, by using the usual dyeing treatment with disperse dyes, the inside of the multifilament yarn can be uniformly dyed into a dark color.

[0064] When the copolymerization amount of IPA is lower than the above range, the adhesive force caused by hot melt adhesion and heat shrinkage is reduced, the root of the hook-shaped hooking element is difficult to be firmly fixed to the fabric base fabric, and the hook-shaped hooking element is easily pulled out from the Velcro base fabric due to repeated hooking / peeling. In addition, it is difficult to uniformly dye the inside of the multifilament yarn into a dark color by the usual dyeing treatment using disperse dyes.

[0065] On the contrary, when the copolymerization amount of IPA exceeds the above-mentioned range, in order to improve flexibility and the fusion fixation with weft yarn, a multifilament yarn formed by thin filaments is used as warp yarn, but the warp yarn formed by such thin filaments can easily produce single yarn breakage and fluffing of warp yarn due to the up-and-down movement of healds and the insertion of weft yarn in the weaving process of Velcro, and the commodity value of Velcro with single yarn breakage and fluffing is greatly reduced, and the result is that it is difficult to obtain Velcro with commodity value. The generation of this single yarn breakage and fluffing can be improved by increasing the copolymerization amount of DEG in the warp yarn, but if the IPA copolymerization amount increases, the effect of this DEG cannot be compensated.

[0066] That is, when the copolymerization amount of IPA is within the above-mentioned range, there is no need to use multifilament yarn formed by fine filaments as warp yarn in order to improve softness and fusible fixation with weft yarn. In the weaving process of the Velcro, there will be no single yarn breakage or pilling of the warp yarn due to the up and down movement of the heald and the friction of the surface caused by the insertion of the weft yarn, and it is easy to obtain a Velcro with commercial value.

[0067] In addition, when the amount of DEG is less than the above-mentioned range, it is difficult to prevent the single yarn breakage and fuzzing of the warp yarn caused by IPA copolymerization; on the contrary, when the amount of DEG is too much, it is impossible to further improve the effect of preventing the single yarn breakage and fuzzing of the warp yarn caused by IPA copolymerization, but it will damage the excellent mechanical properties and other properties of the PET yarn, thereby resulting in a decrease in the hooking force.

[0068] That is, when the amount of DEG is within the above range, the single yarn breakage and fuzzing of the warp yarn caused by IPA copolymerization can be prevented, and the effect of preventing the single yarn breakage and fuzzing of the warp yarn caused by IPA copolymerization can be obtained without damaging the excellent mechanical properties and other properties of the PET yarn and without causing a decrease in the hooking force.

[0069] Based on the above, in the polyester-based woven surface fastener of the present invention, both the above-mentioned IPA and DEG need to be copolymerized in the above-mentioned specific amounts in the warp yarn.

[0070] In the present invention, it is preferred that the copolymerization amount of IPA is in the range of 1.1 to 1.6 mol% of the total carboxylic acid amount, and the copolymerization amount of DEG is in the range of 2.2 to 3.0 mol% of the total glycol amount. It is further preferred that the copolymerization amount of IPA is in the range of 1.15 to 1.45 mol% of the total carboxylic acid amount, and the copolymerization amount of DEG is in the range of 2.3 to 2.8 mol% of the total glycol amount.

[0071] In addition, it is preferred that the hook-shaped hook element yarn also has IPA and DEG within the above-mentioned copolymerization amount range as copolymer components. In this case, the hook-shaped hook element yarn can achieve the above-mentioned effects of the present invention to a higher degree, and in particular, the pull-out resistance of the hook-shaped hook element is further improved, and the inside of the thick hook-shaped hook element can be dyed to a dark color, and even if the hooking / peeling is repeated, the inside of the monofilament yarn that is not fully dyed will not be exposed due to wear. Similarly, with respect to PET constituting the hook-shaped hook element yarn, it is preferred that the copolymerization amount of IPA is in the range of 1.1 to 1.6 mol% of the total carboxylic acid amount, and the copolymerization amount of DEG is in the range of 2.2 to 3.0 mol% of the total glycol amount, and it is more preferred that the copolymerization amount of IPA is in the range of 1.15 to 1.45 mol% of the total carboxylic acid amount, and the copolymerization amount of DEG is in the range of 2.3 to 2.8 mol% of the total glycol amount.

[0072] In the polyester woven hook and loop fastener of the present invention, the weft yarn needs to be a polyester yarn, that is, a polyester hot-melt adhesive multifilament yarn, specifically a multifilament yarn containing a polyester resin whose melting point is much lower than that of PET constituting the warp yarn and the hook-shaped hooking elements. For the hot-melt adhesive component constituting the yarn, in order to lower the melting point, copolymer components other than terephthalic acid, ethylene glycol, and butanediol, such as PET or PBT polyesters formed by copolymerizing a large amount of IPA, DEG, etc., can be appropriately used.

[0073] The loop-shaped engaging element yarn is also preferably a polyester yarn, and from the viewpoint of particularly excellent dyeability, softness, round loop formation and loop shape retention, a yarn composed of PBT-based polyester can be preferably used, but a yarn composed of PET-based polyester may also be used. Furthermore, when the loop-shaped engaging element yarn is composed of PET-based polyester, the loop-shaped engaging element yarn may or may not contain IPA and DEG as copolymer components, similarly to the warp yarn and the hook-shaped engaging element yarn.

[0074] When the yarn for the loop-shaped hook element is composed of PBT-type polyester, the yarn is preferably a yarn containing polytrimethylene terephthalate in the range of 1 to 8 weight %. In this case, the hot-melt component of the weft yarn needs to be much lower than the melting point of the PBT-type polyester used for the loop-shaped hook element.

[0075] In the present invention, as described above, the PET-based multifilament yarn used as the warp yarn needs to be PET containing specific amounts of IPA and DEG as copolymer components. Furthermore, it is preferred that the dry heat shrinkage rate of the PET-based multifilament yarn used as the warp yarn is in the range of 20 to 25% at 200°C when hook-shaped hook elements are present. In addition, the dry heat shrinkage rate of the PET monofilament yarn used as the hook-shaped hook element yarn is in the range of 22.5 to 27.5% at 200°C, and it is preferred that the dry heat shrinkage rate of the monofilament yarn for the hook-shaped hook element at 200°C is 1 to 5% higher than the dry heat shrinkage rate of the multifilament yarn for the warp yarn at 200°C, because the effect of the present invention can be more highly obtained.

[0076] In addition, when loop-shaped hook elements are present, the dry heat shrinkage rate of the PET-based multifilament yarn used as the warp yarn at 200°C is preferably in the range of 20 to 25%. In addition, when the dry heat shrinkage rate of the polyester-based multifilament yarn used as the yarn for the loop-shaped hook elements at 200°C is in the range of 12 to 20%, and the dry heat shrinkage rate of the multifilament yarn for the loop-shaped hook elements at 200°C is 5 to 10% lower than the dry heat shrinkage rate of the multifilament yarn for the warp yarn at 200°C, the effect of the present invention can be more highly obtained, which is preferred. In addition, in the case of a hook fastener in which hook-shaped hook elements and loop-shaped hook elements coexist, the case in which all the above conditions are satisfied is also preferred for the same reason.

[0077] It should be noted that the 200°C dry heat shrinkage rate specified in the present invention is a value obtained by placing 10 50 cm yarns in a 200°C gas atmosphere in a free state without applying a load for 1 minute, calculating the difference between the length of the yarn after shrinkage after 1 minute and the length of the yarn before shrinkage and dividing the difference by the length before shrinkage. The value is the average value of the values ​​of the 10 yarns.

[0078] Regarding the dry heat shrinkage rate, yarn that meets the above conditions can be easily obtained by selecting stretching conditions represented by the stretching ratio during spinning and subsequent heat treatment conditions. In addition, regarding the copolymerization amount, it can be easily obtained by polymerizing such copolymerized PET, spinning it, and making it into yarn. In addition, it can also be easily obtained by requesting products that meet the above values ​​from synthetic fiber manufacturers.

[0079] In the present invention, the above-mentioned copolymerized PET multifilament yarn can be used as the warp yarn, and from the aspect of the softness of the obtained hook and loop fastener, the thickness of the multifilament yarn constituting the warp yarn is preferably a multifilament yarn with a total decitex of 80 to 240 dtex formed by 18 to 40 filaments, and particularly preferably a multifilament yarn with a total decitex of 90 to 200 dtex formed by 24 to 36 filaments.

[0080] The weft yarn is a multifilament yarn, and the thickness of the multifilament yarn constituting the weft yarn is preferably a multifilament yarn with a total decitex of 150 to 300 dtex formed by 32 to 64 filaments, and particularly preferably a multifilament yarn with a total decitex of 180 to 250 dtex formed by 40 to 56 filaments.

[0081] The weft yarn must contain a low melting point polyester, i.e., a hot melt component. As a representative example of such a multifilament yarn containing a hot melt component, a multifilament yarn formed of a core-sheath type hot melt adhesive filament whose sheath component is a low melting point polyester (i.e., a hot melt component) can be cited. By making the weft yarn contain a hot melt component, the yarn for the hook element can be fixed to the fabric base cloth, and there is no need to apply a polyurethane or acrylic back-coating adhesive to the back of the hook and loop fastener base cloth in order to prevent the yarn for the hook element from being pulled out of the fabric base cloth as in the existing hook and loop fastener.

[0082] By using yarn containing a hot-melt adhesive component in the warp yarn instead of the weft yarn, the hook element yarn can also be fixed to the base fabric. However, since the hook element yarn is woven into the base fabric parallel to the warp yarn, the warp yarn and the hook element yarn intersect at far fewer locations than the weft yarn. Therefore, when only the hot-melt adhesive yarn is used in the warp yarn, the hook element yarn is difficult to be firmly fixed to the base fabric.

[0083] As a multifilament yarn composed of the above-mentioned core-sheath type hot-melt adhesive filaments, there can be mentioned a multifilament yarn composed of polyester-based filaments having a core-sheath type cross section in which the core component does not melt under heat treatment conditions but the sheath component melts. Specifically, as a representative example, there can be mentioned a multifilament yarn composed of core-sheath type polyester filaments, wherein the core-sheath type polyester filaments have a PET polymer as a core component, and have a copolymerized PET or copolymerized PBT as a sheath component, which is obtained by copolymerizing a large amount of copolymerization components represented by IPA, adipic acid, etc., for example, by copolymerizing 20 to 30 mol% to significantly reduce the melting point or softening point (in the present invention, when a softening point exists instead of crystallization due to copolymerization, such softening point is also referred to as a melting point).

[0084] As the core component of the hot-melt adhesive multifilament yarn composed of the polyester core-sheath type filament, since the dye does not reach the core component of the core-sheath state during dyeing, it is not necessary to dye the warp yarn or the hook-shaped hooking element yarn in a dark color. Moreover, the weft yarn is covered by the warp yarn and the hooking element yarn constituting the surface of the Velcro base fabric, and is basically not exposed on the surface of the Velcro base fabric, so the necessity of having dyeability is low. Therefore, as the weft yarn, it is preferably a multifilament yarn composed of the core-sheath type composite filaments in which the PET homopolymer after polymerization of the fiber is directly used as the core component.

[0085] Preferably, the melting point of the sheath component of the multifilament yarn composed of the core-sheath type polyester-based hot-melt adhesive filaments is in the range of 130 to 210°C, and is 20 to 150°C lower than the melting point of the warp yarn, the core component, the monofilament yarn for the hook-shaped hooking element, or the multifilament yarn for the loop-shaped hooking element. The cross-sectional shape of the core-sheath type hot-melt adhesive filaments may be a concentric core-sheath, an eccentric core-sheath, a single core-sheath, or a multi-core core-sheath. The case of a multifilament yarn composed of composite filaments of a single core-sheath is preferred.

[0086] In addition, with regard to the proportion of polyester core-sheath type hot-melt adhesive filaments in the weft yarn, it is preferred that the yarn for the hook-shaped hooking element and the yarn for the loop-shaped hooking element are both firmly fixed to the base fabric, especially when the weft yarn is essentially composed of core-sheath type polyester hot-melt adhesive filaments, that is, when the weft yarn is a multifilament yarn composed only of core-sheath type polyester hot-melt adhesive filaments.

[0087] When the filaments constituting the weft yarn are not in a core-sheath cross-sectional shape and the entire fiber cross-section is formed of a hot-melt-adhesive polymer, the hot-melt-adhesive polymer after melting and resolidification is brittle and easily broken, and the base fabric is easily torn from the seam portion during sewing. Therefore, the hot-melt-adhesive filaments preferably contain a non-hot-melt-adhesive resin, and from the perspective of improving the effect of fusing adjacent yarns, it is particularly preferred to have the above-mentioned core-sheath cross-sectional shape. In addition, the weight ratio of the core component to the sheath component is preferably in the range of 85:15 to 40:60, and particularly preferably in the range of 80:20 to 60:40.

[0088] In order to firmly fix the hook-shaped hook element yarn and the loop-shaped hook element yarn to the base fabric together, it is preferred that the hot-melt adhesive component used as the weft yarn is hot-melted and the hot-melt adhesive multifilament yarn itself shrinks to tighten the roots of the hook-shaped hook element and the loop-shaped hook element from both sides. Therefore, it is preferred that the polyester hot-melt adhesive multifilament yarn used as the weft yarn also undergoes a certain degree of heat shrinkage under the heat treatment condition. Specifically, a yarn having a dry heat shrinkage rate of 14 to 20% at 200°C can be suitably used. In particular, when the shrinkage rate is 15 to 19% and is 5 to 12% lower than the dry heat shrinkage rate of the warp yarn and the hook-shaped hook element yarn at 200°C, it is preferred in terms of improving the pull-out resistance of the hook element and more highly preventing uneven shrinkage in the width direction of the hook fastener.

[0089] The hook-shaped engaging element is required to have a so-called hook shape retention and rigidity that the hook shape does not stretch under a light force, and therefore a thick monofilament yarn is used. In the present invention, the monofilament yarn is preferably a monofilament yarn formed of a PET polymer containing the above-mentioned copolymer component having excellent hook shape retention in the above-mentioned ratio and further maintaining the excellent rigidity of PET.

[0090] The thickness of the monofilament yarn for hook-shaped hooking elements made of PET is preferably 0.15 to 0.22 mm in diameter, more preferably 0.16 to 0.20 mm in diameter, from the viewpoint of hooking force. In order to increase the hooking force, the cross-sectional shape of the monofilament may be a special cross-sectional shape represented by a polygon such as a triangle or a quadrilateral.

[0091] As described above, the polyester woven hook and loop fastener of the present invention can be a loop hook and loop fastener with loop hook elements, and can also be a hook / loop coexistence type hook and loop fastener with hook hook elements and loop hook elements coexisting on the surface. In the case of such a hook and loop fastener with loop hook elements, the loop hook element yarn used is preferably composed of PET or PBT polyester as described above, and is preferably composed of polyester that does not melt at a temperature when the hot-melt adhesive component of the hot-melt adhesive multifilament yarn is hot-melted, especially a multifilament yarn composed of PBT polyester, from the perspective of the feel of the hook and loop fastener, and the aspect of the unfolding and the resistance to lying down of the loop hook element, and further from the aspect of being able to be dyed into a dark color under mild dyeing conditions.

[0092] When a multifilament yarn made of PET is used as the loop engaging element yarn, it is preferable to use a multifilament yarn made of PET obtained by copolymerizing the same copolymer component as the warp yarn at the same copolymerization ratio as the warp yarn.

[0093] When a multifilament yarn made of PBT is used as the yarn for the loop-shaped hook element, it is sometimes preferable to use a multifilament yarn made of PBT containing 1 to 8% by weight of polytrimethylene terephthalate. In such a multifilament yarn, the filaments constituting the loop-shaped hook element are easily loosened, and when the filaments are loosened using a card cloth or the like, the filaments constituting the multifilament yarn are not easily cut by such a treatment, and further, even if the hook peeling is repeated, the filaments are not easily cut, resulting in an improved hook strength. In addition, a darker dyeing can be achieved under mild dyeing conditions using disperse dyes.

[0094] The thickness of the multifilament yarn constituting the loop-shaped engaging element yarn is preferably a multifilament yarn consisting of 6 to 12 filaments with a total decitex of 250 to 380 dtex, and particularly preferably a multifilament yarn consisting of 7 to 10 filaments with a total decitex of 280 to 350 dtex. In addition, the multifilament yarn for the loop-shaped engaging element preferably undergoes heat shrinkage under the conditions that the heat-fusible component of the heat-fusible multifilament yarn of the weft yarn is fused, similarly to the warp yarn, from the perspective of the fixing effect of the engaging element. Specifically, the dry heat shrinkage rate at 200° C. is preferably 12 to 20%, as described above.

[0095] As described above, the following steps A, B, and D are sequentially performed to produce a woven surface fastener from the warp yarns, weft yarns, and monofilament yarns for hook-shaped engaging elements or multifilament yarns for loop-shaped engaging elements described above.

[0096] [Step A] When weaving a base fabric from warp yarns and weft yarns, a hooking element yarn is woven in parallel with the warp yarns and at the same time, the hooking element yarn is made to stand up regularly in a loop shape from the surface of the base fabric to weave a loop fabric;

[0097] [Step B] a step of introducing the loop fabric into a heating zone, heating it to a temperature above the melting point of the hot-melt component of the polyester hot-melt multifilament yarn, and fixing the rising portion of the loop to the fabric base fabric by the molten material from the polyester hot-melt multifilament yarn;

[0098] [Step D] When the loop is composed of a monofilament yarn, one leg of the loop is cut off to form the loop into a hook-shaped engaging element.

[0099] First, the step A is described. As the fabric structure of the fabric, a plain weave in which the hook element yarn is a part of the warp yarn is preferred. These hook element yarns are woven in parallel with the warp yarns and stand up from the fabric base fabric surface in the middle of the structure. When the hook element yarn is a monofilament yarn, the fabric structure is such that the loop is formed and jumps 1 to 3 warp yarns and drills between the warp yarns. On the other hand, when the hook element yarn is a multifilament yarn, the fabric structure is such that the loop does not jump over the warp yarn or jumps over one warp yarn to form a loop and exists in parallel with the warp yarn. In such a case, the loop surface is easy to face the same direction, which is preferred in terms of appearance. In addition, when the hook-shaped hook element is a loop, the side of the single leg can be cut efficiently and reliably. In addition, it is also preferred from the perspective of easy hooking of the hook-shaped hook element and the loop-shaped hook element.

[0100] The weaving density of the warp yarn is preferably 35 to 80 yarns / cm after heat treatment, and the weft yarn is preferably 12 to 30 yarns / cm after heat treatment. Moreover, the weight ratio of the weft yarn is preferably 15 to 40% relative to the total weight of the hook-shaped hook element yarn, the loop-shaped hook element yarn, the warp yarn, and the weft yarn constituting the hook and loop fastener.

[0101] In addition, in the woven Velcro of the present invention, the height of the hook-shaped hooking element, considering the hooking force and further considering the non-falling property of the hooking element, is preferably 1.2 to 1.8 mm from the fabric base surface as measured by the height after heat shrinkage, and further, the height of the loop-shaped hooking element is preferably 1.9 to 3.0 mm from the fabric base surface.

[0102] The density of the hook-shaped hook elements in the hook fastener is preferably 30 to 70 pieces / cm based on the base fabric portion where the hook elements are present (based on the portion where the hook elements are present other than the ear portion (the portion without the hook elements)) and based on the width after heat shrinkage. 2 The density of the loop-shaped hook elements in the loop fastener is preferably 30 to 70 pieces / cm on the same basis. 2 The total density of the hook-shaped hook elements and the loop-shaped hook elements in the hook / loop fastener is preferably 30 to 70 pieces / cm on the same basis. 2 Furthermore, in the hook / loop type 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.

[0103] In the hook fastener, the number of monofilament yarns for hook-shaped hook elements woven into the hook fastener is preferably about 2 to 8 yarns relative to 20 warp yarns (including monofilament yarns for hook-shaped hook elements), and the number of multifilament yarns for loop-shaped hook elements woven into the loop fastener is preferably about 2 to 8 yarns relative to 20 warp yarns (including monofilament yarns for hook-shaped hook elements). In the case of a hook / loop combined type fastener, the total number of monofilament yarns for hook-shaped hook elements and multifilament yarns for loop-shaped hook elements is preferably 2 to 8 yarns relative to 20 warp yarns (including monofilament yarns for hook-shaped hook elements and multifilament yarns for loop-shaped hook elements), and the ratio of the number of monofilament yarns for hook-shaped hook elements to the number of multifilament yarns for loop-shaped hook elements is preferably in the range of 40:60 to 60:40.

[0104] It should be noted that when forming a hook-shaped hooking element loop, in order to easily form a highly uniform hook-shaped hooking element loop, the following method can be used: a plurality of metal rods are placed side by side on the fabric base cloth parallel to the warp yarn at the position where the hook-shaped hooking element yarn crosses the warp yarn, the hooking element yarn is passed through the upper part of the metal rod to form a loop, and the metal rod is pulled out of the loop after the loop is formed.

[0105] Next, the hook and loop fastener fabric thus obtained is sent to the above-mentioned step B, and is subjected to a heat treatment to melt the sheath component, i.e., the hot melt adhesive component, of the core-sheath type polyester multifilament yarn. Figure 1 As shown, the fabric is not wound up midway, but is continuously moved in a heat treatment furnace (3) in a long strip state for heat treatment. Through this heat treatment, the sheath component of the core-sheath type hot-melt adhesive multifilament yarn constituting the weft yarn is melted, and at the same time, the warp yarn, the hook element yarn and the weft yarn are shrunk, and the monofilament yarn and multifilament yarn for the hook element are fixed to the fabric base cloth. Then, it is preferred that the long strip of hook and loop fastener fabric moving in the heat treatment furnace is moved without applying too much tension so that it can be fully shrunk.

[0106] Thus, the existing back-coating adhesive coating and drying treatment of the Velcro tape are not required, and the above-mentioned process problems caused by the back-coating adhesive and the performance problems such as the softness of the Velcro tape being impaired can be prevented. In addition, the loop shape of the hook-shaped hooking element is fixed by the heat during the heat treatment, and even after the hook-shaped hooking element is made into a hook-shaped hooking element by cutting off one leg of the loop in the subsequent process D, the hook shape can be maintained to obtain sufficient hooking strength. In addition, in the case of the loop-shaped hooking element, the loop shape becomes a natural and uniform shape.

[0107] As the temperature during the heat treatment, 150 to 220°C is generally used, which is a temperature at which the hot-melt adhesive component constituting the weft yarn melts or softens, but the other components and yarns do not melt, and the shape of the hook-shaped hook element monofilament yarn and the loop hook element yarn is fixed in a loop shape, more preferably in the range of 185 to 215°C, and further preferably in the range of 190 to 210°C. Such a heat treatment is generally performed by running the hook and loop fastener fabric in a heated furnace. Specifically, the heat treatment is completed by running the hook and loop fastener fabric in a heating furnace at a speed of 0.30 to 1.30 m / min for 20 to 120 seconds.

[0108] Next, in the case where the woven Velcro has a hook-shaped hooking element loop on the surface, one leg side portion of the leg portion of the hook-shaped hooking element loop protruding from the surface is cut off to form a hook-shaped hooking element. However, from the perspective of being able to reduce the undulation of the Velcro in the up and down directions, and further preventing the hooking element from being pulled out of the fabric base cloth due to repeated hooking and peeling, it is preferably performed the following step C before this.

[0109] [Step C] A step of taking out the base fabric from the heating zone of step B and pressing the back side of the base fabric against a fixed surface or a roller surface while the hot-melt component of the polyester hot-melt multifilament yarn is melted.

[0110] That is, the yarns constituting the base fabric are pressed together through step C, and the hot-melt adhesive component extruded by the pressing penetrates into the adjacent yarns, thereby further improving the bonding force and firmly fixing the hooking element to the base fabric. Therefore, the hooking element can be highly prevented from being pulled out of the base fabric, and the undulation in the vertical direction caused by the shrinkage in the heat treatment step can be eliminated.

[0111] Particularly preferred is Figure 1 As shown, the above step C is performed when the Velcro fabric that has been heat treated in the above step B comes out of the heat treatment furnace (3), so that when it is taken out of the heat treatment furnace (3), the back side of the fabric base cloth (1) is pressed against a fixed surface or roller surface (4) while the hot melt adhesive component constituting the weft yarn remains molten. Figure 1It describes the operation of pressing the back side of the hook and loop fastener fabric (1) against the fixed surface (4) just after being taken out from the heat treatment furnace (3).

[0112] In particular, in the present invention, if the above-mentioned step C is performed by pressing the base fabric against a fixed surface or a roller surface while sliding the base fabric on the surface, the above-mentioned effects of eliminating undulation and improving the pull-out resistance of the hook element can be further obtained. That is, it is particularly preferred to satisfy any of the following conditions: pressing the back side of the base fabric against a fixed surface or a roller surface; and preventing the hook element loop on the surface opposite to the pressing surface from being crushed by the operation; and sliding the running base fabric on a fixed surface or on a roller surface rotating at a surface speed different from the running speed of the base fabric.

[0113] In this way, by sliding on a fixed surface or roller surface while being pressed against it and moving on it, the filaments constituting the warp yarn can be promoted to move to a stable position. At the same time, the weft yarn is also stabilized in a natural state and the contraction state is uniform. As a result, the strain of the base fabric is eliminated and the extrusion of the hot melt adhesive component from the weft yarn can be promoted.

[0114] By pressing against a fixed surface or roller surface in this way, it is possible to satisfy the requirement that the thickness of the warp yarn in the base fabric thickness direction at the part most sunk into the back side, which is sandwiched between the weft yarns and bulges / sinks up and down, is less than 0.94 times the thickness of the warp yarn at the part most bulging on the surface side.

[0115] In addition, when performing step C, as described later, the running direction of the loop fabric is changed after contacting with a fixed surface or roller surface, and the tension applied to the base fabric is set to about 50 to 600 g / cm. More preferably, the tension is about 100 to 400 g / cm.

[0116] It is particularly preferred to perform the above step C by pressing the loop fabric against a fixed surface while sliding it on the surface and changing the traveling direction. By changing the traveling direction, it is easier to press against a fixed surface or roller surface, and the effect of pressing and sliding is improved. Figure 1 In the process, the Velcro fabric (1) is changed in direction by 90° along the fixed surface (4).

[0117] In addition, it is preferred that the base fabric taken out from the above step B is not temporarily cooled, and after the step B, at the time when the base fabric is still in a high temperature state due to the heat applied in the step B (for example, the hot-melt adhesive component of the polyester hot-melt adhesive multifilament yarn is not fixed), the above step C is performed at a temperature lower than the temperature of the step B, that is, using the residual heat of the step B. Even if the base fabric taken out from the step B is temporarily cooled and then reheated, the strain of the base fabric is difficult to eliminate, and it is difficult to fully obtain the effect of the present invention. Therefore, it is preferred that the step C is immediately performed near the site where the step B is performed, while the hook and loop fastener fabric taken out from the step B is in a heated state, that is, at a temperature lower than the temperature of the step B and higher than the temperature of the hot-melt adhesive component of the polyester hot-melt adhesive multifilament yarn is not fixed.

[0118] For the Velcro fabric, it is preferred that its surface and back side do not contact solid objects such as rollers and guides at all from the time it enters the heat treatment furnace (3) until the back side is pressed against the fixed surface or roller surface (4), so that the fixed surface or roller surface is the initial contact object.

[0119] In the present invention, the fixed surface or roller surface (4) used in step C is preferably a surface having a contact length of 20 to 100 mm and a contact time of 2 to 10 seconds with the back side of the textile base fabric. Specific preferred materials include metal, ceramic, and heat-resistant resin fixed surfaces and roller surfaces. The surface of the fixed surface or roller surface may be a mirror surface or a rough surface. In addition, if the back side of the base fabric can be pressed, it may have a small amount of unevenness. In addition, the travel speed difference when sliding on the fixed surface or roller surface (in the case of the fixed surface, it is the speed on it, and in the case of the roller surface, it is the difference between the travel speed of the loop fabric traveling on its surface and the surface speed of the roller surface) is preferably 4 to 30 mm / second.

[0120] It should be noted that, in order to improve the contact effect, it is preferred to heat such a fixed surface and roller surface to a temperature 80 to 100°C lower than the above-mentioned heat treatment temperature. Usually, the fixed surface and roller surface can be heated by utilizing the residual heat of the heat-treated textile base fabric taken out of the heat treatment furnace. In this way, the temperature of step C will naturally be lower than the heat treatment temperature of step B. When the temperature of step C is higher than the temperature of step B, although the up-and-down undulations generated in step B are eliminated, there is a possibility that such undulations will be newly generated due to step C.

[0121] The surface pressing the back side of the base cloth may be a surface whose surface is fixed, or may be any of the following surfaces: a roller surface that rotates at a surface speed different from the speed of the base cloth as the base cloth moves in contact with the surface, or a roller surface that is driven by a belt that actively stretches the base cloth and rotates at a surface speed different from the speed of the base cloth. However, in the case of a roller surface, as described above, it is preferred that there is a difference between the surface speed of the roller and the travel speed of the loop fabric that presses its surface and moves, so that the back side of the loop fabric slides on the roller surface, and thus the device becomes complicated. Therefore, in the present invention, it is preferred to use a roller surface that has a simple structure and can easily and reliably obtain the effect, such as Figure 1 In addition, the fixed surface can be a narrow surface in the shape of a guide rod, preferably a fixed surface having a contact length as described above.

[0122] In the present invention, Figure 1 As shown, it is preferred that the fabric base fabric (1) is advanced, passed through a heat treatment furnace (3), the warp and weft yarns are shrunk as described above by the heat treatment furnace (3), and then taken out of the heat treatment furnace (9), and then it is continuously advanced on a fixed surface or roller surface (4), so that when it is pressed against the fixed surface or roller surface (4), the fabric base fabric (1) is in a state where tension is applied in the warp direction. For the fabric base fabric, it is preferred that a tension of about 50 to 600 g / cm is applied to the fabric base fabric just after passing through the fixed surface or roller surface (4). It is more preferred that a tension of about 100 to 400 g / cm is applied.

[0123] In the case of the polyester woven hook and loop fastener of the present invention, the warp yarns sandwich the weft yarns and rise / sink above and below them, so the back side of the fabric base cloth is covered by the warp yarns, and the weft yarns with the hot melt adhesive component are basically not in direct contact with the fixed surface or the roller surface. Therefore, the problem that the molten material of the hot melt adhesive component directly adheres to the fixed surface or the roller surface and thus causes an undesirable situation will not occur.

[0124] From the perspective of productivity and from the perspective of being able to highly demonstrate the effect of performing [Step C], it is preferred that the hook and loop fastener fabric after the heat treatment is not temporarily cooled, but Figure 1 As described, the back side of the hook and loop fastener fabric (1) is pressed against a fixed surface or roller surface (4) by utilizing the residual heat of the heat treatment in succession to the heat treatment in the heat treatment furnace (3) while the hot-melt adhesive component constituting the weft yarn is molten.

[0125] In the method of the present invention, it is preferred that the back side of the fabric base fabric (1) is pressed against a fixed surface or roller surface (4) while the hot melt adhesive component is molten [step C], such as Figure 2As shown, the warp yarn thickness (Tb) in the direction of the base fabric thickness at the part most sunk into the back side of the warp yarn sandwiching the weft yarn and bulging / sinking above and below is less than 0.94 times the warp yarn thickness (Ts) in this direction at the part most bulging on the surface side, that is, the (Tb) / (Ts) ratio is less than 0.94 times.

[0126] In particular, in the present invention, not only is the surface pressed against a fixed surface and slid, but as described above, the surface is pressed against a fixed surface while sliding on the surface, and the traveling direction is changed, thereby satisfying that the thickness of the warp yarns in the base fabric thickness direction at the part most sunk to the back side of the warp yarns that sandwich the weft yarns and bulge / sink up and down is 0.94 times or less, preferably 0.90 times or less of the thickness of the warp yarns at the part most bulging on the surface side, which is particularly preferred. It should be noted that Figure 2 and Figure 3 In the figure, K represents the thickness direction of the base fabric.

[0127] Among them, when (Tb) is excessively reduced, the back side of the Velcro base fabric is densely flattened due to hot melt bonding, and the softness, feel, and air permeability / liquid permeability that are the advantages of the fabric are damaged, which is not preferred. Therefore, (Tb) is preferably more than 0.7 times (Ts), that is, the (Tb) / (Ts) ratio is preferably more than 0.7 times, and particularly preferably more than 0.75 times.

[0128] Figure 2 The schematic diagram shows that the cross-sectional state of the fabric hook and loop fastener can be further obtained by pressing the back side of the fabric base cloth (1) to a fixed surface or roller surface (4) while the hot melt adhesive component is molten, i.e., the case where (Tb) is less than 0.94 times (Ts). On the other hand, Figure 3 The diagram schematically shows the cross-sectional state of a fabric hook and loop fastener in a case where the back side of the fabric base cloth (1) is not pressed against a fixed surface or roller surface (4) while the hot-melt adhesive component is molten. In this case, (Tb) and (Ts) are substantially the same value, and the (Tb) / (Ts) ratio of less than 0.94 as described above is not satisfied.

[0129] It should be noted that even if the operation of pressing the back side of the fabric base cloth to a fixed surface or roller surface while the hot-melt adhesive component is molten, i.e., [Process C], is not performed, the value of (Tb) will be slightly smaller than the value of (Ts) due to the natural gravity of the Velcro in the manufacturing process of the Velcro fabric, but the reduction is very small, and (Tb) will not be lower than 0.96 times (Ts), and therefore will not be lower than 0.94 times.

[0130] Next, a method for measuring (Tb) and (Ts) of a warp yarn that sandwiches a weft yarn and rises and sinks above and below the weft yarn will be described.

[0131] First, select an area on the surface where hooking elements exist and which is least affected by the hooking elements, and use a safety razor as a cutting device to cut the hook and loop fastener parallel to the warp yarns in such a way as to cut the raised center of the warp yarns.

[0132] Next, the obtained cross section was magnified 200 times and photographed. The resulting photograph of the cut section is schematically shown in FIG. Figure 2 . From the photograph, randomly select 3 places where the warp yarns are most sunken on the back side, and randomly select 3 places where the warp yarns are most raised on the surface side, and measure the thickness of the base fabric thickness direction at each place. Perform the same measurement at any 10 places of the hook and loop fastener, and measure the thickness of the base fabric thickness direction at each place.

[0133] Among the total 30 measured values ​​of the warp yarn thickness in the base fabric thickness direction at the part most sunken on the back side and the total 30 measured values ​​of the warp yarn thickness in the base fabric thickness direction at the part most raised on the surface side, 5 values ​​are removed in order from the highest value and 5 values ​​are removed in order from the lowest value, and the average value of the remaining 20 values ​​is obtained. The obtained average values ​​are the warp yarn thickness in the base fabric thickness direction at the part most sunken on the back side (Tb) and the warp yarn thickness in the base fabric thickness direction at the part most raised on the surface side (Ts).

[0134] It should be noted that, at the moment when the hot melt adhesive resin of the weft yarn remains in a molten state, even if the Velcro fabric is pressed to a fixed surface or roller surface, the warp yarns present in the back side of the Velcro fabric are not all pressed to a fixed surface or roller surface at the position that is most sunk into the back side, wherein, sometimes there are also positions where the thickness (Tb) of the back side of the warp yarn and the thickness (Ts) of the surface side that are not pressed to a fixed surface or roller surface are basically unchanged, and in the present invention, such positions are also included in the arbitrarily selected positions. Therefore, it can be considered that the (Tb) / (Ts) ratio defined by the present invention is an average value obtained by also including these positions.

[0135] on the other hand, Figure 3 This is a diagram showing a situation where the hook and loop fastener fabric is not pressed against a fixed surface or roller surface as described above. Figure 3 In such a case, that is, when (Tb) and (Ts) are substantially the same value, the effect obtained by using process C cannot be obtained, that is, the effect of reducing the undulation of the Velcro in the up and down directions and further preventing the hooking element from being pulled out of the fabric base cloth due to repeated hooking and peeling cannot be obtained.

[0136] In the present invention, the ratio of (Tb) to (Ts) is mainly affected by the pressing strength when the hook and loop fastener base fabric is pressed to a fixed surface or roller surface. Therefore, the hook and loop fastener base fabric is allowed to travel on a fixed surface or roller surface in a state where tension is applied, preferably while the base fabric is pressed to the surface and while it is allowed to slide on the surface, and then, as Figure 1 When the running direction is changed along a fixed surface or roller surface as shown, this value can be freely changed by adjusting the tensile force of the base fabric, the degree of change in the running direction, the temperature of the base fabric, etc.

[0137] It should be noted that, in the present invention, preferably at the moment of keeping molten state at the hot melt adhesive composition constituting weft yarn, when the back side of Velcro fabric base cloth is pressed to fixed face or roller surface, the surface side of Velcro fabric base cloth with the hooking element circle of Velcro fabric base cloth is not pressed to fixed face or roller surface.That is, when Velcro fabric base cloth is sandwiched between rollers and Velcro fabric base cloth is pressed from top to bottom, the hooking element circle erected on the surface of fabric base cloth is overwhelmed due to the pressing from top, and is fixed to the surface of fabric base cloth under this state, therefore, as the hooking ability of Velcro, the outward appearance of Velcro is also deteriorated.In addition, when the surface side of Velcro fabric base cloth and the back side of these two sides are pressed to fixed face or roller surface, (Tb) is substantially equal to (Ts), and (Tb) / (Ts) ratio that cannot satisfy the limited by the present invention is below 0.94.

[0138] Next, in the case where the hook element loop is a hook-shaped hook element loop, the fabric having the hook element loop on the surface is sent to the above-mentioned step D, and one side of the hook-shaped hook element loop is cut in the step D. As a cutting device used for this purpose, a cutting device having a structure in which one leg of the hook-shaped hook element loop of the hook fastener fabric base fabric or the hook / loop combined type hook fastener fabric base fabric running in the warp direction is preferably cut between two fixed knives by the reciprocating motion of a movable cutting knife. The fabric after one leg of the hook-shaped hook element loop is cut can be used as a hook fastener or a hook / loop combined type hook fastener.

[0139] In particular, in the present invention, the undulation of the Velcro base fabric in the up and down directions is eliminated by performing step C. Therefore, in step D, a certain height portion of one leg of the hook-shaped hooking element loop can be easily cut off. As a result, a hook fastener with a constant cutting position, i.e., a constant hooking force, can be obtained.

[0140] The polyester woven hook and loop fastener thus obtained is preferably dyeable. The preferred dyeing utilizes high temperature and high pressure dyeing using disperse dyes used for dyeing polyester fiber products. That is, in a state where the polyester woven hook and loop fastener of the present invention is wound into a roll-shaped strip, specifically, it is preferably carried out in the following manner: a hook and loop fastener of 50 to 300 m in length is wound into a roll-shaped strip, the roll-shaped strip is placed on a partition plate, multiple partition plates on which such roll-shaped strips are placed are stacked in the up-down direction and inserted into a dyeing kettle, and then the dye solution is circulated in the kettle to contact the hook and loop fastener with the dye solution.

[0141] As specific dyeing conditions, for example, dyeing at about 120 to 140° C. for about 20 to 120 minutes is preferred. The type of disperse dye used for dyeing is not particularly limited, and any disperse dye conventionally used for dyeing polyester fibers can be used, such as monoazo, diazo, anthraquinone, etc., as well as nitro, styryl, methine, etc. disperse dyes.

[0142] For polyester woven hook and loop fastener of the present invention, by carrying out [operation C], the ups and downs in the up and down direction can be eliminated, and when such hook and loop fastener is wound into a roll, the interval of the hook and loop fastener around, i.e. the uniformly spaced windings (rolls) of the hook and loop fastener that overlap can be obtained. When such hook and loop fastener wound with uniform intervals is dyed in the state of winding, because the intervals are uniform, the contact with dyeing liquid is carried out equally (i.e. the bias flow of dyeing liquid is few), and the dyeing hook and loop fastener that is uniformly dyed, i.e. the dyeing is less uneven can be obtained. And if the PET yarn used as the warp yarn is dyed by disperse dyes, then compared with general PET yarn, it can be dyed into a dark color. In addition, as mentioned above, the dyeing of disperse dyes is carried out for a long time under high temperature and high pressure, and at this moment, the hook and loop fastener of the present invention also has the advantage of being difficult to produce new ups and downs.

[0143] As described above, the polyester woven hook and loop fastener of the present invention has very excellent dyeability. Specifically, even if the polyester woven hook and loop fastener of the present invention is cut, the warp yarns and weft yarns appearing in the cut section are all dyed into dark colors, so the whitish interior of the yarn that is insufficiently dyed will not be exposed in the cross section.

[0144] As described above, by sequentially carrying out the above-mentioned process A, process B and process D, preferably carrying out the above-mentioned process C between process B and process D, and using yarn made of PET copolymerized with a specific amount of IPA and DEG as warp yarn, the root of the hook element of the woven hook and loop fastener with hook elements thus obtained is firmly fixed to the fabric base cloth, and even if the hook and loop stripping is repeated, the hook element is rarely pulled out of the fabric base cloth, and although the hook element is not easy to be pulled out from the base cloth, the softness of the base cloth is also excellent, and the dye is dyed into a dark color by using disperse dyes through high temperature and high pressure dyeing to allow the dye to enter the fiber interior, until the cross section that is revealed by cutting the hook and loop fastener is also dyed into a dark color. In addition, the ups and downs that are usually generated in the heat treatment process of process B and the subsequent dyeing process are eliminated by process C, and the deviation of the hook force is small. In addition, it is possible to reliably cut only one leg of the hook-shaped hook element, and the fixing of the hook element to the fabric becomes more secure.

[0145] Therefore, for the polyester woven hook and loop fastener of the present invention, the pulling force of the hook-shaped hook-engaging element extracted from the base fabric has a very high value. In the present invention, for the pulling force of the hook-shaped hook-engaging element extracted from the base fabric, since the warp yarn has a specific copolymer component and the hot-melt adhesive yarn also has a specific copolymer component, the affinity of the two is high, and as a result, the warp yarn and the hot-melt adhesive yarn are firmly combined. In addition, the yarns constituting the hook and loop fastener are all heat-shrinkable yarns, and thus, the root of the hook-engaging element is firmly fastened, and it is further preferred that the hook-shaped hook-engaging element is also a yarn with the same specific copolymer component, and therefore, the root of the hook-shaped hook-engaging element is fixed by the melting of the molten resin of the hot-melt adhesive component with high affinity, and further by the operation of pressing the back of the fabric base fabric to the fixed surface or roller surface in the state where the hot-melt adhesive component has been melted after the heat treatment, the bonding force of the melt-adhesive component and the hook-engaging element yarn is further improved, and therefore, the pulling force of the hook-shaped hook-engaging element reaches a very high value.

[0146] It should be noted that the pull-out force of the hook-shaped hook element mentioned here refers to the value obtained by measuring the maximum strength when the hook-shaped hook element is pulled out from the base fabric of the hook and loop fastener. In addition, in the case of a hook / loop coexistent type hook and loop fastener, it refers to the value of the pull-out force of the hook-shaped hook element. In the present invention, they are the values ​​obtained by widely selecting 10 arbitrary hook-shaped hook elements, measuring their pull-out forces and adopting their average value.

[0147] The polyester woven hook and loop fastener of the present invention can be used in the fields of application where existing ordinary woven hook and loop fasteners are used, for example, in addition to clothes, shoes, bags, hats, gloves, etc., it can also be used in a wide range of fields such as sphygmomanometers, protective gear, packaging straps, strapping tapes, various toys, fixing of civil engineering and construction sheets, fixing of various panels, wall materials, fixing of electrical components, assembleable / detachable storage boxes, packing boxes, small parts, curtains, etc., and particularly requires flexibility and is suitable for installing the hook and loop fastener on cloth and sheets by sewing, such as clothes, shoes, bags, hats, gloves, protective gear and other fields.

[0148] Among them, it is suitable for polyester fiber products that are dyed with disperse dyes after the hook and loop fastener is installed, and it is suitable for the use of dyeing the fiber product and the hook and loop fastener simultaneously with disperse dyes after the woven hook and loop fastener of the present invention is installed on the polyester fiber product by sewing, etc., i.e., the so-called post-dyeing use. Moreover, the polyester woven hook and loop fastener of the present invention, especially the hook hook and loop fastener, can be recycled after use.

[0149] Example

[0150] Below, the present invention is described more specifically by embodiment.It should be noted that, in the embodiment, the hooking force of Velcro is measured according to JISL 3416-2000.In addition, for the dry heat shrinkage of the yarn used, select 10 arbitrarily, measure their dry heat shrinkage, adopt the mean value of these values.As the Velcro of hooking object when measuring the hooking force, when the Velcro of embodiment and comparative example is hook Velcro, B2790Y (Kuraray Velcro Co., Ltd. system) is used as loop Velcro, when the Velcro of embodiment and comparative example is loop Velcro, A8693Y (Kuraray Velcro Co., Ltd. system) is used as hook Velcro, when the Velcro of embodiment and comparative example is hook / loop coexistence type Velcro, identical hook / loop coexistence type Velcro is used respectively. In the following Examples and Comparative Examples, the copolymerization ratio of IPA and DEG refers to the ratio of IPA to the total molar ratio of the dicarboxylic acid component of the polymerization raw material, and similarly, refers to the ratio of DEG to the total molar ratio of the diol component.

[0151] Example 1

[0152] The following yarns were prepared as warp yarns and weft yarns constituting the fabric base fabric of the hook fastener and monofilament yarns for hook-shaped engaging elements.

[0153] [Warp]

[0154] ·Multifilament yarn composed of copolymer PET

[0155] (Copolymerization ratio: IPA 1.3 mol% and DEG 2.6 mol%)

[0156] Total decimal point and number of filaments: 167dtex, 30 filaments

[0157] Dry heat shrinkage at 200°C: 22.7%

[0158] [Weft yarn (multifilament hot-melt bonded yarn composed of core-sheath composite fibers)]

[0159] Core composition: fiber grade PET

[0160] · Sheath component: PET copolymerized with 25 mol% isophthalic acid (softening point: 190°C)

[0161] Core sheath ratio (weight ratio): 70:30

[0162] Total dtex and number of filaments: 198dtex, 48 filaments

[0163] · Dry heat shrinkage at 200°C: 17.1%

[0164] [Monofilament yarn for hook-shaped hooking elements]

[0165] Monofilament yarn composed of non-copolymer PET

[0166] (IPA: 0 mol%, DEG: 1.3 mol%)

[0167] Diameter (before heat shrinkage): 0.19mm

[0168] Dry heat shrinkage at 200°C: 23.1%

[0169] [Manufacture of hook and loop fasteners]

[0170] The above-mentioned warp yarn, weft yarn and hook-shaped hook element monofilament yarn were used, and plain weave was used as the fabric structure, so that the weaving density (after heat shrinkage treatment) was 55 yarns / cm for warp yarn and 18.9 yarns / cm for weft yarn, and the hook-shaped hook element monofilament yarn was woven in parallel with the warp yarn at a ratio of 1 yarn to 4 warp yarns, and after 5 weft yarns were raised / sunk, 3 warp yarns were crossed, and loops were formed on the base fabric in a manner that loops were formed at the crossed positions. It should be noted that the following method was used to form the loops for the hook-shaped hook element: a plurality of metal rods were placed side by side on the fabric base fabric in parallel with the warp yarns at the positions where the hook-shaped hook element yarns crossed the warp yarns, and the hook element yarns were passed from the upper part of the metal rods to form loops, and the metal rods were pulled out of the loops after the loops were formed.

[0171] The hook fastener tape woven under the above conditions was run in a heat treatment furnace for 60 seconds at a temperature of 200°C, at which only the sheath component of the weft yarn was heat-fused, and the warp yarn, the multifilament yarn for the loop engaging element, and the core component of the weft yarn were not heat-fused, and heat-treated to shrink the weft yarn, the weft yarn, and the monofilament yarn for the hook-shaped engaging element. As a result, the tape shrank by 11% in the weft yarn direction, and the sheath component melted, causing the yarns present nearby to fuse.

[0172] When the hot melt adhesive component remains in a molten state, Figure 1 As described, a fabric tape for hook and loop fastener is slid on a fixed surface of stainless steel having a mirror-finished surface provided next to the exit of a heat treatment furnace, and after passing through the fixed surface, the tape is advanced under a tension of 300 g / cm, and the back of the tape is pressed against the fixed surface for 5 seconds at a temperature lower than the temperature of the heat treatment process using the residual heat of the heat treatment process, and the advancing direction is bent 90 degrees along the surface. The obtained fabric is cooled, and one leg of the loop of the hook-shaped hooking element is cut off to form a hook-shaped hooking element. It should be noted that, from the process of weaving the fabric, the process of applying the heat treatment is continuously performed without winding up until the process of cutting off one leg.

[0173] As a result, no undulation of the hook and loop fastener in the vertical direction was observed during the heat treatment process, and as a result, the single-leg cutting of the hook-shaped hooking element could be performed without any problem, and only one leg of all the hook-shaped hooking elements was completely cut off to maintain the hook shape.

[0174] The density of hook-shaped hook elements of the obtained hook fastener fabric was 45 pieces / cm 2 In addition, the height of the hook-shaped hooking elements from the fabric base surface is 1.5 mm.

[0175] The warp thickness (Tb) of the hook fastener in the base fabric thickness direction at the most sunken portion on the back side and the warp thickness (Ts) of the hook fastener in the base fabric thickness direction at the most raised portion on the front side were measured. The result showed that (Tb) / (Ts) was 0.89.

[0176] Next, the pull-out force of the hook-shaped hooking element of the Velcro was measured, and the result was 9.34N, and it can be known that the pull-out resistance is very excellent. In addition, the flexibility of the Velcro is excellent, and in addition, the single yarn breakage and fluffing of the warp yarn are not occurred at all, and when the Velcro is installed on the blank by sewing, the rigidity of the blank will not be greatly damaged, and it is suitable as the buckle of clothes. In addition, in order to observe the presence or absence of the ups and downs in the up-down direction, the Velcro is placed side by side in parallel on a flat glass plate and observed, and the result does not observe ups and downs.

[0177] In addition, the hooking force of the hook fastener was measured, and the initial hooking force was 13.2 N / cm in terms of shear strength. 2 , the peel strength is 1.18N / cm, and the hooking force after 1000 hooking / peeling is 12.8N / cm in shear strength 2 The peel strength was 1.12 N / cm, and even after 1000 repetitions of hooking / peeling, no hook-shaped hooking elements were observed to be pulled out from the surface of the hook fastener, and although there was no back coating, it was excellent as a hook fastener.

[0178] In addition, the hook fastener was dyed with disperse dyes, resulting in a hook fastener dyed in a dark crimson color, excellent in dyeability, and no up-and-down fluctuations during dyeing. In addition, the hook fastener was cut in a manner that the warp yarns were cross-cut, resulting in a cross section uniformly dyed in a dark color. The presence or absence of fluctuations in the dyed hook fastener was also observed, and no fluctuations were observed.

[0179] Examples 2 to 3, Comparative Examples 1 to 2

[0180] In the above-mentioned Example 1, a hook fastener was produced in the same manner as in Example 1 except that the multifilament yarn used as the warp yarn was changed to the following multifilament yarn.

[0181] [Warp Yarn Used in Example 2]

[0182] ·Multifilament yarn composed of copolymer PET

[0183] (Copolymerization ratio: IPA 1.1 mol% and DEG 2.2 mol%)

[0184] Total decimal point and number of filaments: 167dtex, 30 filaments

[0185] Dry heat shrinkage at 200°C: 21.4%

[0186] [Warp Yarn Used in Example 3]

[0187] ·Multifilament yarn composed of copolymer PET

[0188] (Copolymerization ratio: IPA 1.8 mol% and DEG 3.2 mol%)

[0189] Total decimal point and number of filaments: 167dtex, 30 filaments

[0190] Dry heat shrinkage at 200°C: 22.6%

[0191] [Warp Yarn Used in Comparative Example 1]

[0192] ·Multifilament yarn composed of copolymer PET

[0193] (Copolymerization ratio: IPA 0.8 mol% and DEG 1.8 mol%)

[0194] Total decimal point and number of filaments: 167dtex, 30 filaments

[0195] Dry heat shrinkage at 200°C: 22.7%

[0196] [Warp Yarn Used in Comparative Example 2]

[0197] ·Multifilament yarn composed of copolymer PET

[0198] (Copolymerization ratio: IPA 2.5 mol% and DEG 3.9 mol%)

[0199] Total decimal point and number of filaments: 167dtex, 30 filaments

[0200] Dry heat shrinkage at 200°C: 23.1%

[0201] The performance of the hook fasteners obtained in the above examples and comparative examples is shown in the following Table 1. It should be noted that the hook fastener of Comparative Example 2 had single yarn breakage and fuzzing during the weaving process, and thus a commercially valuable hook fastener could not be obtained, so the subsequent steps were not carried out.

[0202] Regarding the hooking force of the three hook fasteners obtained except Comparative Example 2, the hook fastener of Comparative Example 1 was inferior in hooking force after repeated hooking / peeling 1000 times, and a small amount of hook-shaped hooking elements were observed to be pulled out from the surface of the hook fastener after repeated hooking / peeling 1000 times, but otherwise had a hooking force substantially equivalent to that of Example 1. The softness of the hook fastener of Comparative Example 1 was slightly inferior, and Examples 2 and 3 both had excellent softness.

[0203] It should be noted that in the above table, regarding the cutting of one leg of the hook-shaped hooking element, the case where only one leg of basically all hooking elements was completely cut was evaluated as ○, and the case where a small amount of hooking elements with one leg not cut or hooking elements in an incomplete cutting state were observed was evaluated as △. In addition, regarding the generation of single yarn breakage and fuzzing of the hook and loop fastener, the case where no breakage occurred was evaluated as ○, the case where a small amount of breakage occurred but did not significantly damage the product value was evaluated as △, and the case where there was no product value due to the generation of single yarn breakage and fuzzing was evaluated as ×. In addition, regarding dyeability, the case where it could be uniformly dyed to a dark color even to the cross section as in Example 1 was evaluated as ○, and the case where no dyeing was observed in the cross section was evaluated as ×.

[0204] [Table 1]

[0205]

[0206] The above results show that the hook fastener using a multifilament yarn composed of copolymerized PET in which the copolymerization amount of IPA is within the range of 1.0 to 2.0 mol% and the copolymerization amount of DEG is within the range of 2.0 to 3.5 mol% in the warp yarn has excellent pull-out resistance of the hook element, excellent dyeability, and excellent softness and hooking force. In contrast, it is known that in the case of copolymerized PET outside the above range, there are disadvantages such as single yarn breakage and fuzzing during the weaving process, and poor pull-out resistance, dyeability, and hooking force of the hook element.

[0207] Comparative Example 3

[0208] In the above-mentioned Comparative Example 1, a hook fastener was produced in the same manner as in the above-mentioned Comparative Example 1, except that the back side of the fastener was not pressed against a fixed surface made of stainless steel arranged next to the outlet of the heat treatment furnace while the hot-melt adhesive multifilament yarn after heat treatment remained in a molten state, but was pulled with a roller after cooling.

[0209] The obtained hook fasteners were placed side by side on a horizontal glass plate. As a result, large fluctuations in the vertical direction were observed in various places. In addition, in the hook-shaped hooking element, it was observed that the base of one leg was not accurately cut off and remained in a loop shape, both legs were cut off and did not form a hook shape, and only one leg was cut halfway. In addition, the pull-out force of the hook-shaped hooking element was measured and the result was 6.9N, which was significantly worse than Example 1 and Comparative Example 1.

[0210] The warp thickness (Tb) of the hook fastener in the base fabric thickness direction at the most sunken portion on the back side and the warp thickness (Ts) of the hook fastener in the base fabric thickness direction at the most raised portion on the front side were measured. The result showed that (Tb) / (Ts) was 0.97.

[0211] Furthermore, the hook fastener and the loop fastener were repeatedly engaged and peeled off 1000 times. As a result, the fabric in the hook-shaped engaging elements was pulled out from the base fabric and protruded from the surface of the fastener more frequently than in Comparative Example 1.

[0212] The hook fastener was dyed, but the cross section was not sufficiently dyed and color spots were generated. During the dyeing process, the hook fastener contracted more unevenly and frequently had slight undulations in the vertical direction.

[0213] Example 4

[0214] In Example 1, a hook fastener was produced in the same manner as in Example 1 except that the monofilament yarn for hook-shaped engaging elements was changed to the monofilament yarn composed of copolymer PET described below. In the case of this fastener, single yarn breakage and fuzzing did not occur during the weaving process.

[0215] [Monofilament yarn for hook-shaped hooking elements]

[0216] ·Monofilament yarn composed of copolymer PET

[0217] (IPA: 1.3 mol%, DEG: 2.6 mol%)

[0218] Diameter (before heat shrinkage): 0.19mm

[0219] Dry heat shrinkage at 200°C: 23.6%

[0220] The (Tb) / (Ts) of the obtained hook fastener is 0.88. In addition, in the hook fastener, only one leg of all the hook-shaped hooking elements is completely cut off to maintain a uniform hook shape. Next, the pull-out force of the hook-shaped hooking element of the fastener was measured, and the result was 10.27N, which shows that the pull-out resistance is better than that of Example 1. In addition, compared with Example 1, the fastener is more flexible. When the fastener is installed on the blank by sewing, the rigidity of the blank is damaged less than that of Example 1, which is very suitable as a fastener for clothes. And it is known that the rigid hook-shaped hooking element is softer than Example 1, from this point of view, it can be felt that the fastener is soft.

[0221] In order to observe the presence or absence of undulation in the vertical direction, the hook and loop fasteners were placed parallel to each other on a flat glass plate and observed. As a result, similar to Example 1, no undulation was observed.

[0222] Furthermore, the hooking force of the hook fastener was measured, and the initial hooking force was 14.1 N / cm in terms of shear strength. 2 The peel strength is 1.21N / cm, and the hooking force after 1000 hooking / peeling is 13.6N / cm in shear strength. 2 , the peel strength was 1.18N / cm, and even after 1000 times of hooking / peeling, no hook-shaped hooking element was observed to be pulled out from the surface of the hook fastener. It can be seen that the root of the hook element is more firmly fixed. From the above, it can be seen that the hook fastener of this embodiment is excellent as a hook fastener even though there is no back coating.

[0223] In addition, the hook fastener was dyed with disperse dyes in the same manner as in Example 1, and a hook fastener was obtained that was brightly dyed into a dark crimson color, had excellent dyeability, and did not produce up-and-down fluctuations during dyeing. In addition, the warp yarn was cut in a cross-cutting manner, and the cross section was uniformly dyed into a dark color. The presence or absence of fluctuations of the dyed hook fastener was also observed, and no fluctuations were observed.

[0224] Examples 5 to 6, Comparative Examples 4 to 6

[0225] In the above-mentioned Example 1, a hook fastener was produced in the same manner as in Example 1 except that the multifilament yarn used as the warp yarn was changed to the following multifilament yarn.

[0226] [Warp Yarn Used in Example 5]

[0227] ·Multifilament yarn composed of copolymer PET

[0228] (Copolymerization ratio: IPA 1.1 mol% and DEG 3.2 mol%)

[0229] Total decimal point and number of filaments: 167dtex, 30 filaments

[0230] Dry heat shrinkage at 200°C: 22.6%

[0231] [Warp Yarn Used in Example 6]

[0232] ·Multifilament yarn composed of copolymer PET

[0233] (Copolymerization ratio: IPA 1.8 mol% and DEG 2.2 mol%)

[0234] Total decimal point and number of filaments: 167dtex, 30 filaments

[0235] · Dry heat shrinkage at 200°C: 22.0%

[0236] [Warp Yarn Used in Comparative Example 4]

[0237] ·Multifilament yarn composed of copolymer PET

[0238] (Copolymerization ratio: IPA 1.3 mol% and DEG 1.7 mol%)

[0239] Total decimal point and number of filaments: 167dtex, 30 filaments

[0240] · Dry heat shrinkage at 200°C: 21.5%

[0241] [Warp Yarn Used in Comparative Example 5]

[0242] ·Multifilament yarn composed of copolymer PET

[0243] (Copolymerization ratio: IPA 0.8 mol% and DEG 2.6 mol%)

[0244] Total decimal point and number of filaments: 167dtex, 30 filaments

[0245] Dry heat shrinkage at 200°C: 21.9%

[0246] [Warp Yarn Used in Comparative Example 6]

[0247] ·Multifilament yarn composed of non-copolymer PET

[0248] (Copolymerization ratio: IPA is 0 mol% and DEG is 1.3 mol%)

[0249] Total decimal point and number of filaments: 167dtex, 30 filaments

[0250] Dry heat shrinkage at 200°C: 22.1%

[0251] The performance of the five kinds of hook fasteners obtained by the above embodiments and comparative examples is shown in the following table 2. It should be noted that, for the hook fastener of comparative example 4, it was found that the hook fastener with commercial value could not be obtained due to the occurrence of single yarn breakage and fuzzing in the weaving process, so no subsequent process was performed. Regarding the hooking force of the four kinds of hook fasteners except the hook fastener of comparative example 4, comparative examples 5 and 6 were poor in the initial hooking force and the hooking force after repeated hooking / peeling 1000 times, and a small amount of hook-shaped hooking elements were observed to be extracted from the surface of the hook fastener after repeated hooking / peeling 1000 times. In addition, it was a hooking force roughly equivalent to that of embodiment 1. It should be noted that in the table, the evaluation (○, △, ×) of single yarn breakage, fuzzing and dyeability is the same as the benchmark recorded in Table 1.

[0252] [Table 2]

[0253]

[0254] According to the above results, even if one of the copolymerization amount of IPA and the copolymerization amount of DEG is out of the range defined by the present invention (Comparative Examples 4 and 5), single yarn breakage and fuzzing occur in the weaving process, or the pull-out resistance of the hooking element is poor, and the dyeability is also poor. In contrast, it can be seen that in the case where the copolymerization amount is within the range defined by the present invention (Examples 5 and 6), these problems do not exist. It can be seen that in the case of non-copolymerized PET in which the copolymerization component is the naturally occurring DEG amount and IPA is not copolymerized (Comparative Example 6), the pull-out resistance and dyeability of the hooking element are poor.

[0255] Example 7

[0256] The following yarns were prepared as multifilament yarns for loop-shaped hook elements, and loop fasteners were manufactured by the following method using the multifilament yarns for loop-shaped hook elements, the multifilament yarns for warp described in Example 1, and the multifilament yarns for weft described in Example 1.

[0257] [Multifilament yarn for loop hook elements]

[0258] High shrinkage multifilament yarn composed of PBT mixed with 5 wt% of polytrimethylene terephthalate (melting point: 220°C)

[0259] Total dtex and number of filaments: 305dtex, 8 filaments

[0260] Dry heat shrinkage at 200°C: 17.3%

[0261] [Manufacturing of Velcro]

[0262] The warp yarn, weft yarn and multifilament yarn for loop-shaped hook elements were used, and plain weave was used as the fabric structure, so that the weaving density (after heat shrinkage treatment) was 55 warp yarns / cm and 21 weft yarns / cm, and the multifilament yarn for loop-shaped hook elements was woven in parallel with the warp yarns at a ratio of 1 yarn to 4 warp yarns without crossing the warp yarns, and after 5 weft yarns were raised / sunk, loops were formed on the fabric base fabric. In this weaving process, single yarn breakage and fuzzing did not occur.

[0263] The loop hook and loop fastener tape woven under the above conditions was run in a heat treatment furnace for 50 seconds at a temperature of 190° C., at which only the sheath component of the weft yarn was heat-fused, and the core component of the warp yarn, the multifilament yarn for the loop hook element, and the weft yarn was not heat-fused, and heat treatment was performed to shrink the weft yarn, the weft yarn, and the multifilament yarn for the loop hook element. As a result, the tape shrank by 10% in the weft yarn direction, and the sheath component melted, causing the yarns present nearby to fuse.

[0264] While the hot melt adhesive component is kept in a molten state, the loop hook and loop fastener fabric tape is slid and moved on a fixed surface of stainless steel with a mirror-finished surface arranged next to the outlet of the heat treatment furnace in the same manner as in Example 1. The back of the tape is pressed against the fixed surface for 5 seconds using the residual heat of the above-mentioned heat treatment process, and the moving direction is bent 90 degrees along the surface to cool the obtained fabric. It should be noted that from the process of weaving the fabric, the process of implementing the heat treatment is continuously carried out without winding, until the back is pressed against the fixed surface and cooled.

[0265] The above results show that no fluctuation in the vertical direction of the loop fastener was observed during the heat treatment process, and the density of hook-shaped hooking elements of the obtained loop fastener fabric was 46 pieces / cm 2 In addition, the height of the loop-shaped hooking elements from the fabric base surface is 2.1 mm.

[0266] The warp yarn thickness (Tb) in the base fabric thickness direction at the part most sunken on the back side of the loop of hook and loop fastener and the warp yarn thickness (Ts) in the base fabric thickness direction at the part most raised on the surface side were measured, and the result was (Tb) / (Ts) was 0.87.

[0267] Next, the pull-out force of the loop-shaped hook element of the hook and loop fastener was measured, and the result was 22.1 N, indicating that the pull-out resistance was very excellent. It should be noted that the pull-out force of the loop-shaped hook element was measured as follows: the multifilament yarn for the loop-shaped hook element was cut at a position where the multifilament yarn forming the loop-shaped hook element formed a loop, sunk under the weft yarn, and then protruded on the surface of the base fabric, and the measurement was performed in this state.

[0268] In addition, the Velcro tape has excellent flexibility, and when the Velcro tape is attached to the blank by sewing, the rigidity of the blank is not greatly damaged, and it is very suitable as a buckle for clothing. In addition, in order to observe the presence or absence of ups and downs in the vertical direction, the Velcro tapes were placed parallel to each other on a flat glass plate and observed, and the result was that no ups and downs were observed.

[0269] In addition, the hooking force of the loop of hook and loop fastener was measured, and the result was that the initial hooking force was 13.1 N / cm in shear strength. 2 , the peel strength is 1.16N / cm, and the hooking force after 1000 hooking / peeling is 12.6N / cm in shear strength 2 The peel strength was 1.11 N / cm, and even after 1000 repetitions of hooking / peeling, no loop-shaped hooking elements were observed to be pulled out from the surface of the loop fastener.

[0270] In addition, the loop fastener was dyed with disperse dyes, resulting in a loop fastener dyed into a deep red bright color, excellent in dyeability, and no ups and downs were produced during dyeing. The warp yarns of the dyed loop fastener were cut in a cross-cut manner, resulting in the cross section being uniformly dyed into a dark color. The presence or absence of ups and downs of the fastener after dyeing was also observed, and the result was that no ups and downs were observed.

[0271] Comparative Example 7

[0272] In the above-mentioned Example 7, the multifilament yarn used as the warp yarn was replaced with the multifilament yarn for warp yarn used in the above-mentioned Comparative Example 6 (IPA copolymerization amount: 0 mol %, DEG copolymerization amount: 1.3 mol %), and the loop fastener was manufactured in the same manner as in the above-mentioned Example 7. In this case, no single yarn breakage or fuzzing was observed in the weaving process. The pull-out force of the loop-shaped hooking element of the obtained loop fastener was measured, and the result was 18.1N, which shows that the pull-out resistance of the hooking element is inferior to that of the above-mentioned Example 7. In fact, after repeatedly hooking / peeling 1000 times, it was observed that a small amount of a part of the loop-shaped hooking element was loosely pulled out from the surface of the loop fastener. In addition, it is also inferior to the above-mentioned Example 7 in terms of softness, and it cannot be considered to be suitable for use in fields requiring high softness.

[0273] In addition, in order to observe whether the loop hook and loop fastener has undulation in the vertical direction, the loop hook and loop fastener was placed parallel to each other on a flat glass plate for observation, and no undulation was observed. The hooking force of the loop hook and loop fastener was measured, and the result was that the hooking force was not inferior to that of the above-mentioned Example 7. When the hooking / peeling was repeated 1000 times as described above, a small amount of filaments in the multifilament yarn constituting the loop hooking element were observed to be pulled out from the loop hook and loop fastener base fabric surface.

[0274] In addition, the loop fastener was dyed using disperse dyes in the same manner as in Example 7, resulting in a loop fastener having a surface dyed a bright dark red color, but the loop fastener was cut in a manner that cross-cuts the warp yarns, resulting in an insufficiently dyed portion being observed in the cross section.

[0275] Example 8

[0276] Using the warp yarn and weft yarn described in the above-mentioned Example 1, the monofilament yarn for the hook-shaped hooking element described in Example 4 (IPA copolymerization amount: 1.3 mol%, DEG copolymerization amount: 2.6 mol%) and the multifilament yarn for the loop-shaped hooking element described in Example 7 (PBT mixed with 5 wt% of polytrimethylene terephthalate), a hook / loop coexisting type fastener was produced by the following method.

[0277] Production of Hook / Loop Velcro

[0278] A plain weave was used as the fabric structure, and the weaving density (after heat shrinkage treatment) was 55 warp yarns / cm and 18.5 weft yarns / cm. In the case of a multifilament yarn for loop-shaped hook ...

[0279] At this time, the multifilament yarn for the loop-shaped engaging element and the monofilament yarn for the hook-shaped engaging element are woven alternately so as to exist continuously in units of two yarns. It should be noted that when forming the loops for the hook-shaped engaging element, the following method is used in the same manner as in the first embodiment: a plurality of metal rods are placed side by side on the fabric base fabric in parallel with the warp yarns at positions where the hook-shaped engaging element yarns cross the warp yarns, the engaging element yarns are passed from the upper parts of the metal rods to form loops, and the metal rods are pulled out of the loops after the loops are formed.

[0280] The woven hook / loop coexisting type Velcro tape was heat-treated by running it in a heat treatment furnace for 60 seconds at a temperature of 205° C. at which only the sheath component of the weft yarn was heat-melted and the core component of the warp yarn, the hook element yarn, and the weft yarn was not heat-melted. Then, while the hot-melt adhesive component was kept in a molten state, Figure 1 According to the description, the hook and loop fastener fabric tape is slid on a fixed surface of stainless steel having a mirror-finished surface provided close to the exit of a heat treatment furnace, and after passing the fixed surface, the tape is advanced under a tension of 300 g / cm, so that the back of the tape is pressed against the fixed surface for 5 seconds by utilizing the residual heat of the heat treatment process, and the advancing direction is bent 90 degrees along the surface. As a result, the weft yarn, the weft yarn, and the hook element yarn are contracted, the tape is contracted by 11% in the weft direction, and the sheath component is melted, causing the yarn present nearby to fuse. The obtained fabric is cooled, and then one leg of the hook-shaped hook element loop is cut off to form a hook-shaped hook element.

[0281] The density of hook-shaped hook elements of the obtained hook / loop type hook fastener is 32 pieces / cm 2 , the density of the loop hook elements is 32 pieces / cm 2 In addition, the height of the hook-shaped hooking element from the base fabric surface is 2.1 mm, and the height of the loop-shaped hooking element from the base fabric is 1.6 mm. It should be noted that the process of heat treatment is continuously performed from the process of weaving the fabric without winding up in the middle until one leg of the hook-shaped hooking element loop is cut off.

[0282] The above results show that the obtained hook / loop coexisting type fastener is similar to Example 1 and Example 2, and no ups and downs of the fastener are observed in the heat treatment process, and as a result, one leg of the hook-shaped hooking element can be cut without any problem. The warp yarn thickness (Tb) of the hook / loop coexisting type fastener in the base fabric thickness direction at the position most sunk into the back side and the warp yarn thickness (Ts) of the base fabric thickness direction at the most raised position on the surface side were measured, and the result was that (Tb) / (Ts) was 0.88.

[0283] The pull-out force of the hook-shaped hooking element of the hook and loop fastener was measured and the result was 7.62 N. It can be seen that as a hook / loop coexisting hook and loop fastener, it has excellent pull-out resistance. The obtained hook and loop fastener is very soft. As in Example 1, the hook and loop fastener is attached to the blank by sewing, but the rigidity of the blank is not greatly damaged, and it is suitable as a fastener for clothing.

[0284] In addition, the hooking force of the hook / loop fastener was measured, and the initial hooking force was 10.4 N / cm in shear strength. 2 , the peel strength is 1.43N / cm, and the hooking force after 1000 hooking / peeling is 9.1N / cm in shear strength 2 , the peel strength is 1.30N / cm. As a hook / loop coexisting type fastener, it has excellent hooking force. Even after repeated hooking / peeling 1000 times, no hook-shaped hooking elements or loop-shaped hooking elements were found to be pulled out from the fabric base cloth.

[0285] Use crimson disperse dye to dye this hook / loop coexistence type Velcro, as a result, obtain the Velcro that is dyed into crimson dark bright color uniformly, dyeability is very excellent.In addition, the Velcro after dyeing is cut off and the cross section is observed, and the result is until the inside of the cross section is dyed into dark color, even if the surface of the hook-shaped hook-up element is rubbed gently with sandpaper, the inner layer that is not dyed is not exposed.And, in the dyeing process, Velcro does not shrink unevenly and produces ups and downs in the vertical direction, in addition, the pull-out resistance of the hook-shaped hook-up element of the Velcro after dyeing is also the excellent value identical with the value before dyeing.

[0286] Comparative Example 8

[0287] In Example 8, a hook / loop type surface fastener was produced in the same manner as in Example 8, except that the multifilament yarn for warp described in Comparative Example 6 (IPA copolymerization amount: 0 mol%, DEG copolymerization amount: 1.3 mol%) was used as the warp yarn, and the monofilament yarn for hook engaging elements described in Example 1 (IPA: 0 mol%, DEG: 1.3 mol%) was used as the hook engaging element yarn. No single yarn breakage or fuzzing occurred in the weaving process.

[0288] The warp thickness (Tb) of the obtained hook / loop coexisting type fastener in the base fabric thickness direction at the position most sunken in the back side and the warp thickness (Ts) of the base fabric thickness direction at the position most raised on the surface side were measured, and the result was (Tb) / (Ts) was 0.90. The pull-out force of the hook-shaped hooking element of the fastener was measured, and the result was 6.72N, which was worse than the above-mentioned Example 8. The obtained fastener was slightly rigid, and compared with Example 1, it may not be suitable for the field of clothing for infants and patients that highly requires softness.

[0289] It should be noted that the hooking force of the hook / loop coexisting type fastener did not change compared with the above-mentioned Example 8, but after repeated hooking / peeling 1000 times, it was observed that the hook-shaped hooking element and the loop-shaped hooking element were pulled out from the fabric base cloth in small amounts. The hook / loop coexisting type fastener was dyed with a crimson disperse dye, and the result was that although the hook / loop coexisting type fastener was dyed crimson, when the dyed fastener was cut and the cross section was observed, insufficiently dyed warp yarns were observed. The surface of the hook-shaped hooking element was gently rubbed with sandpaper, and the undyed inner layer was exposed.

Claims

1. A polyester woven hook and loop fastener, which uses a fabric as a fabric base fabric, wherein the fabric uses a polyethylene terephthalate multifilament yarn as a warp yarn and a polyester hot-melt adhesive multifilament yarn as a weft yarn, A hooking element yarn consisting of at least one selected from a polyethylene terephthalate-based monofilament yarn and a polyester-based multifilament yarn is woven into the fabric base fabric in parallel with the warp yarns. On the surface of the fabric base fabric, there are a plurality of hooking elements formed by the hooking element yarn and standing up from the surface of the fabric base fabric, wherein the hooking elements are composed of at least one selected from a hook shape and a loop shape. The root of the hook element is fixed to the fabric base fabric by the melt-solidified product of the hot-melt adhesive component of the polyester hot-melt adhesive multifilament yarn. The polyethylene terephthalate-based multifilament yarn is composed of copolymerized polyethylene terephthalate containing, as copolymerization components, 1.0 to 2.0 mol % of isophthalic acid relative to the total amount of dicarboxylic acids and 2.0 to 3.5 mol % of diethylene glycol relative to the total amount of glycols.

2. The polyester woven hook and loop fastener according to claim 1, wherein: When the engaging element yarn is a monofilament yarn, the engaging elements formed by the monofilament yarn are hook-shaped engaging elements. When the engaging element yarn is a multifilament yarn, the engaging elements formed by the multifilament yarn are loop-shaped engaging elements.

3. The polyester woven hook and loop fastener according to claim 1 or 2, wherein: When the hook element yarn is a monofilament yarn, the monofilament yarn is composed of copolymerized polyethylene terephthalate containing 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 glycols as copolymerization components.

4. The polyester woven hook and loop fastener according to claim 1 or 2, wherein: When the hook element yarn is a multifilament yarn, the multifilament yarn is composed of a polyester of the polyethylene terephthalate type or the polybutylene terephthalate type.

5. The polyester woven hook and loop fastener according to claim 1 or 2, wherein: The fabric base fabric satisfies that: the warp yarn thickness in the fabric base fabric thickness direction at the part most sunken on the back side of the warp yarns which bulge / sink above and below the weft yarns is less than 0.94 times the warp yarn thickness in the fabric base fabric thickness direction at the part most bulging on the surface side.

6. A polyester woven hook and loop fastener, which is obtained by dyeing the polyester woven hook and loop fastener according to claim 1 or 2 with disperse dyes.

7. A method for manufacturing a woven hook and loop fastener, wherein the woven hook and loop fastener uses a fabric as a fabric base fabric, wherein the fabric uses a polyethylene terephthalate-based multifilament yarn as a warp yarn and a polyester-based hot-melt adhesive multifilament yarn as a weft yarn, A hooking element yarn consisting of at least one selected from a polyethylene terephthalate-based monofilament yarn and a polyester-based multifilament yarn is woven into the fabric base fabric in parallel with the warp yarns. On the surface of the fabric base fabric, there are a plurality of hooking elements formed by the hooking element yarn and standing up from the surface of the fabric base fabric, wherein the hooking elements are composed of at least one selected from a hook shape and a loop shape. The method sequentially performs the following steps A, B and D, and uses the multifilament yarn composed of copolymerized polyethylene terephthalate as a warp yarn, wherein the copolymerized polyethylene terephthalate contains 1.0 to 2.0 mol % of isophthalic acid relative to the total amount of dicarboxylic acids and 2.0 to 3.5 mol % of diethylene glycol relative to the total amount of diols as copolymerization components, [Step A] When weaving a base fabric from warp yarns and weft yarns, a hooking element yarn is woven in parallel with the warp yarns and the hooking element yarn is made to stand up regularly in a loop shape from the surface of the base fabric to weave a loop fabric; [Step B] a step of introducing the loop fabric into a heating zone, heating it to a temperature above the melting point of the hot-melt component of the polyester hot-melt multifilament yarn, and fixing the rising portion of the loop to the fabric base fabric by the molten material from the polyester hot-melt multifilament yarn; [Step D] When the loop is composed of a monofilament yarn, a single leg of the loop is cut to form the loop into a hook-shaped engaging element.

8. The method for producing a polyester woven hook and loop fastener according to claim 7, wherein: When the hook element yarn is a monofilament yarn, a monofilament yarn composed of copolymerized polyethylene terephthalate containing 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 glycols as copolymerization components is used.

9. The method for producing a polyester woven hook and loop fastener according to claim 7, wherein: When the fastening element yarn is a multifilament yarn, a multifilament yarn made of a polyethylene terephthalate-based or polybutylene terephthalate-based polyester is used.

10. The method for manufacturing a polyester woven hook and loop fastener according to claim 7, wherein: The following step C is performed between steps B and D. [Step C] A step of taking out the base fabric from the heating zone of step B and pressing the back side of the base fabric against a fixed surface or a roller surface while the hot-melt component of the polyester hot-melt multifilament yarn is melted.

11. The method for producing a polyester woven hook and loop fastener according to claim 10, wherein: [Step C] is performed by sliding the back surface of the fabric base fabric on the fixed surface while pressing the back surface of the fabric base fabric against the fixed surface, and moving the fabric base fabric to change the moving direction of the fabric base fabric on the fixed surface.

12. The method for manufacturing a polyester woven hook and loop fastener according to claim 10, wherein: The fabric base fabric taken out from [Step B] is not temporarily cooled, and [Step C] is performed at a temperature lower than the temperature of [Step B] by utilizing residual heat of [Step B] after [Step B].

13. A method for manufacturing a dyed polyester woven hook and loop fastener, the method comprising: The polyester woven surface fastener obtained by the method for producing a polyester woven surface fastener according to any one of claims 7 to 12 is dyed with a disperse dye.

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