JP2016123419A - Gray fabric for loop surface fastener, method for manufacturing loop surface fastener, and loop surface fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gray fabric for a loop surface fastener which easily engages a hook-shaped engaging element to obtain high engaging force by dissolving and removing a water-soluble fiber so that a loop-shaped engaging element bulges and easily gets loose and imparts a soft loop surface fastener which is less likely to cause a substantial decrease in the engaging force after repeating engagement and separation.SOLUTION: In a gray fabric for a loop surface fastener, plural pieces of multifilament yarn for a loop-shaped engaging element protrude in the form of a loop on a surface of a cloth base fabric. The multifilament yarn for the loop-shaped engaging element includes a water-soluble fiber.SELECTED DRAWING: Figure 1

Description

  The present invention produces a loop surface fastener with a woven fabric before weaving and dyeing, which can be a loop surface fastener suitable for clothing, supporters, shoes, daily goods, etc. by adding treatment to the product of the present invention. The present invention relates to a loop hook-and-loop fastener production machine that is a woven fabric for the above-mentioned purpose, a method for producing a loop hook-and-loop fastener from the machine, and a loop hook-and-loop obtained from the loop hook-and-loop fastener production machine.

  Conventionally, a fabric having a hook-like engagement element on the surface and a fabric having a loop-like engagement element on the surface are overlapped with each other with the hook-like engagement element and the loop sandwiched between the surfaces having the engagement elements. It is widely used as a woven hook-and-loop fastener since both the fabrics can be locked and integrated by engaging the splay engaging elements.

  Of these woven surface fasteners, a hook-and-loop fastener having hook-like engagement elements is mainly formed from a hook-like engagement element monofilament yarn, ground warp and ground weft. On the other hand, a hook-and-loop fastener having a loop-shaped engagement element that is an engagement partner of a hook-and-loop engaging element is mainly formed of a loop-shaped engagement element multifilament yarn, a ground warp and a weft. Also known is a hook / loop mixed surface fastener in which a hook-like engagement element and a loop-like engagement element are mixed on the same surface, and this is mainly a monofilament yarn for a hook-like engagement element, a loop-like engagement element. It is formed from multi-filament yarn for combination element, ground warp yarn and ground weft yarn. And these hook-and-loop fasteners may be woven with other yarns if necessary depending on the application.

  With respect to a hook-and-loop fastener having a loop-like engagement element (hereinafter referred to as a loop hook-and-loop fastener, including a hook / loop mixed type hook-and-loop fastener), the multifilament yarn constituting the loop-like engagement element is usually simply woven. They are bundled as a single thread, and are difficult to engage with the hook-like engagement element, and therefore have a problem that a high engagement force cannot be obtained. As a means for solving such a problem of the engagement force, a method is known in which the multifilament yarn constituting the loop-like engagement element is broken by raising the surface of the loop surface fastener by rubbing the surface with a needle cloth. (Patent Document 1).

  Certainly, the method of raising the surface of the loop hook-and-loop fastener with a knitted cloth will give a high engagement force by breaking the multifilament yarns that are bundled together, but on the other hand, it will damage the multifilament yarns. As a result, the multifilament filaments constituting the loop-like engagement element are cut at a constant rate, and by repeatedly engaging and peeling, the damaged filament is cut, and the percentage of the cut filament is reduced. There is a problem that the engaging force increases and the engaging force decreases.

  In the case of a woven hook-and-loop fastener, the hook-like engaging element and the loop-like engaging element are made of a hook-like engaging element yarn and a multi-filament yarn for loop-like engaging element that are woven into the base fabric in parallel with the ground warp. A hook-like engagement element is formed by cutting a part constituting the loop in a loop shape on the surface of the base fabric at various portions of the base fabric. The combined element is strongly pulled from the base cloth surface, and the engaging element is pulled out from the base cloth.

  In order to prevent this, a polyurethane or acrylic adhesive is applied to the back surface of the base fabric (the surface opposite to the surface where the engagement elements are present), and the base fabric is impregnated with the adhesive. The method of firmly fixing the yarn for the composite element in the base fabric is generally used (the adhesive layer applied to the back side of the base fabric is generally referred to as the back coat resin layer). When an adhesive is applied to the back of the base fabric, the base fabric is hardened and hardened, and the softness and texture of the base fabric disappears, making it unsuitable for use in clothing or the like that requires drape and the like.

  Instead of such a method of applying an adhesive to the back surface of the hook-and-loop fastener, a thread containing a heat-fusible fiber is used as at least a part of the ground weft constituting the hook-and-loop fastener, and the fiber is fused. A technique for fixing the engagement element yarn to the base fabric is also known (Patent Document 2). However, since the base fabric is solidified by melting the heat-fusible fiber, a technique for applying an adhesive to the entire back surface. Compared to the above, although the degree to which the base fabric is hardened is improved, there has been a demand for a technique that becomes more flexible.

JP 2011-190604 A (paragraphs 0016 and 0024) International Publication 2007/074791 Pamphlet (Claims)

  The present invention solves the above-described problems. Specifically, it is necessary for the multifilament yarn for the loop-shaped engaging element of the loop surface fastener to engage with the engaging element on the hook at the loop portion. For producing a loop surface fastener having a large space and a base fabric that is more flexible than a conventional woven surface fastener, and a method for manufacturing a loop surface fastener from the same machine , And a loop hook-and-loop fastener obtained from the same machine.

  That is, the present invention is a living machine for a loop surface fastener in which a large number of loop-shaped engaging element multifilament yarns protrude in a loop shape on the surface of a fabric base fabric, and the loop-shaped engaging element multifilament yarn is water-soluble. A loop hook and loop fastener production machine characterized by containing fibers.

Preferably, the water-soluble fiber is a polyvinyl alcohol fiber. Preferably, in the above-described loop hook-and-loop fastener production machine, the woven base fabric is composed of ground warp yarn, ground weft yarn and multi-filament yarn for loop-like engagement element, and the multi-filament yarn for loop-like engagement element is parallel to the ground warp yarn. A heat-fusible fiber is used as at least a part of the weft yarn.
Preferably, in the loop hook-and-loop fastener manufacturing machine, the multi-filament yarn for the loop-shaped engagement element is a combined yarn of a polyester multifilament yarn and a polyvinyl alcohol water-soluble multifilament yarn.

Furthermore, the present invention fixes the base of the multi-filament yarn for the loop-like engagement element by fusing the heat-fusible fiber of the loop surface fastener production machine, and constitutes the multi-filament yarn for the loop-like engagement element. It is the manufacturing method of the loop surface fastener which melt | dissolves and removes the water-soluble fiber to do.
The present invention is also a loop surface fastener obtained by removing the water-soluble fibers constituting the loop surface fastener maker, and the multifilament yarn of the loop portion of the multifilament yarn constituting the loop-shaped engagement element is cut. It is a loop surface fastener in which the ratio of the filament fiber is 5% or less and the loop-shaped engagement element has a bulge.

  The loop hook-and-loop fastener machine according to the present invention contains water-soluble fibers in the multi-filament yarns for loop-shaped engagement elements. When the water-soluble fibers are dissolved and removed, other than the water-soluble fibers that constitute the loop-shaped engagement elements. A part of the space is formed between the fibers, and the loop-shaped engagement element has a bulge. As a result, it becomes easy to engage with the hook-shaped engagement element, and a high engagement force can be obtained. And even if the work of raising the hook-and-loop fastener surface with a knitted cloth to make the filaments (fibers) constituting the loop-like engagement element loose, it can be lightly performed under weaker conditions than the conventional raising process, Since the multifilament constituting the loop-like engagement element is less likely to be cut or damaged as in the prior art, the engagement force is hardly reduced even if the engagement-peeling is repeated.

  Furthermore, in the base fabric of the present invention, a space is formed by dissolving and removing the water-soluble fibers, and the base fabric becomes a flexible fabric. Therefore, it is suitable for applications that require texture, flexibility and drape.

It is the figure which showed typically the part of the loop for loop-shaped engagement elements of the production machine for loop surface fasteners of this invention. It is the figure which showed typically the state after melt | dissolving and removing the water-soluble fiber from the loop for loop-shaped engagement elements of FIG.

  The loop hook-and-loop fastener manufacturing machine according to the present invention has a loop-like engaging element loop and a hook-like engaging element on the surface of the base fabric even if the loop surface fastener has only the loop-like engaging element loop on the surface of the base fabric. It may have both of the loops. That is, the present invention includes all those having a loop-like engagement element loop on one surface of the base fabric.

  As described above, the loop surface fastener is mainly formed of a multifilament yarn for loop-like engagement elements, a ground warp yarn, and a ground weft yarn. All of these main yarns are substantially polyester-based because they do not generate undulations (the surface of the surface of the hook-and-loop fastener irregularly moves up and down and does not become a horizontal surface) due to heat, water absorption or moisture absorption. It is preferably composed of a polymer.

  Conventionally, yarns made of polyamide fibers such as nylon 6 and nylon 66 have been widely used for hook-and-loop fasteners made of woven fabric, and can be used in the present invention. In the case of using a fiber thread, the shape of the base fabric is likely to change due to water absorption / moisture absorption or heat, and adjustment is required.

  Since such adjustment is not required, it is preferable to use fibers mainly composed of a polyester-based polymer as the fibers constituting the ground warp yarn, the ground weft yarn, and the engagement element yarn. The polyester-based polymer is a polyester mainly composed of ethylene terephthalate units or a polyester mainly composed of butylene terephthalate units, and is mainly obtained by a condensation reaction from terephthalic acid and ethylene glycol or a condensation reaction from terephthalic acid and butanediol. It is.

  If some, polymer units other than terephthalic acid and ethylene glycol, or other than terephthalic acid and butanediol may be added. Typical examples of such polymerized units include aromatic dicarboxylic acids such as isophthalic acid, sodium sulfoisophthalate, phthalic acid and naphthalenedicarboxylic acid, and aliphatic or alicyclic dicarboxylic acids such as adipic acid, sebacic acid and cyclohexanedicarboxylic acid. Acids, propylene glycol, butanediol (in the case of polyesters mainly composed of ethylene terephthalate units), ethylene glycol (in the case of polyesters mainly composed of butylene terephthalate units), diols such as cyclohexanedimethanol, hydroxybenzoic acid, lactic acid, etc. Examples thereof include monocarboxylic acids represented by oxycarboxylic acid, acetic acid and benzoic acid. Furthermore, a small amount of other polymers may be added to the polyester.

  Preferably, the yarn other than the weft yarn, that is, the ground warp yarn and the engagement element yarn (excluding the water-soluble fiber) are formed from polyethylene terephthalate homopolymer or polybutylene terephthalate homopolymer. In any case, it has a sufficiently high melting point that does not melt at the heat treatment temperature for fusing the sheath component of the core-sheath type heat-fusible fiber suitable as the fiber constituting the ground weft described later, When the water-soluble fiber constituting the yarn is dissolved and removed, it is necessary to be composed of a polymer that does not dissolve, and in particular, it is preferable that polyethylene terephthalate polyester or polybutylene terephthalate polyester is the main component constituting these yarns. . In addition, the above-mentioned polyester fiber may be mixed with other fibers or blended as necessary.

  As the ground warp yarn, a multifilament yarn is preferable, and as the thickness of the multifilament yarn constituting the ground warp yarn, a multifilament yarn having a total detex of 20 to 40 filaments of 50 to 400 dtex is preferable, especially 25 A multifilament yarn having a total decitex of ~ 35 filaments of 120 to 200 dtex is preferred.

  A multifilament yarn is also preferred for the weft yarn. As described above, the multifilament yarn constituting the weft yarn is preferably a polyester yarn, and the thickness is preferably a multifilament yarn having a total decitex of 10 to 40 filaments of 50 to 150 dtex, particularly A multifilament yarn having a total decitex of 20 to 30 filaments of 80 to 120 dtex is preferred.

  The ground weft preferably contains heat-fusible fibers. A typical example of the heat-fusible fiber is a core-sheath type heat-fusible fiber having a sheath component as a heat-fusible component. Since the ground weft contains heat-fusible fibers, it is possible to firmly fix the engagement element yarn to the base fabric, and the engagement element yarn is pulled out of the base fabric like a conventional surface fastener. In order to prevent this, it is not necessary to apply a polyurethane-based or acrylic-based back coat resin to the back surface of the hook-and-loop fastener base fabric.

  It is possible to fix the engagement element yarn to the base fabric by using heat-fusible fibers instead of the ground weft yarn, but the engagement element yarn is driven into the base fabric in parallel to the ground warp yarn. Therefore, ground warp yarns have much fewer points of intersection with engagement element yarns than ground weft yarns, so it is more relevant to use heat-fusible fibers for weft yarns than for ground warp yarns only. The composite element yarn is preferable because it is easily fixed firmly to the base fabric.

  The core-sheath-type heat-fusible fiber described above is preferably made of a polyester-based resin that melts the sheath component and can firmly fix the base of the multifilament yarn for the loop-shaped engagement element to the base fabric. Examples of the polyester fiber include a core-sheath type cross section in which the core component does not melt under heat treatment conditions but the sheath component melts. Specifically, polyethylene terephthalate is used as a core component, and copolymerization components such as isophthalic acid and adipic acid are copolymerized in large amounts, for example, 15 to 30 mol%, thereby greatly reducing the melting point or softening point. A typical example is a core-sheath type polyester fiber having a copolymer polyethylene terephthalate as a sheath component. The melting point or softening point of the sheath component is preferably 100 to 200 ° C., and preferably 20 to 150 ° C. lower than the melting point of the water-insoluble fiber constituting the ground warp yarn, the core component or the multifilament yarn for loop-like engagement element. . The cross-sectional shape of the core-sheath type heat-fusible fiber may be a concentric core sheath, an eccentric core sheath, a single core core sheath, or a multicore core sheath.

  Furthermore, the ratio of the core-sheath type heat-fusible fiber occupying in the fibers constituting the ground weft is particularly when all of the ground wefts are substantially formed of the core-sheath type heat-fusible fiber, that is, In the case where the weft yarn is a multifilament yarn made of a core-sheath type heat-fusible filament, the multifilament yarn for loop-shaped engagement element is preferably firmly fixed to the base fabric. If the fiber constituting the weft is not a core-sheath cross-sectional shape and the entire cross-section of the fiber is formed of a heat-fusible polymer, the heat-fusible polymer that has melted and solidified again becomes brittle and easily cracked. When sewing, etc., the base fabric is easily torn from the thread portion. Therefore, the heat-fusible fiber preferably contains a resin that is not heat-sealed, and preferably has a cross-sectional shape of the core-sheath. And the weight ratio of the core component and the sheath component is preferably in the range of 20:80 to 80:20, particularly in the range of 40:60 to 60:40.

  Furthermore, in order to firmly fix the multi-filament yarns for loop-shaped engagement elements to the base fabric, the heat-fusible fibers used as the weft yarns are heat-sealed, and the fibers themselves contract to form hooks. It is preferable to tighten the bases of the engaging element and the loop-shaped engaging element from both sides. For this purpose, the heat-fusible fiber used as the ground weft is preferably a fiber that undergoes large heat shrinkage under heat treatment conditions. Specifically, a fiber having a dry heat shrinkage of 8 to 20% at 200 ° C. is preferably used, and a fiber having a shrinkage of 11 to 18% is particularly preferred.

  It is important that the multi-filament yarn for loop-shaped engagement elements constituting the loop surface fastener or the hook-and-loop mixed surface fastener contains water-soluble fibers. The filament yarn is composed of water-soluble fibers and water-insoluble fibers. The water-insoluble fiber is preferably composed of polyethylene terephthalate-based polyester or polybutylene terephthalate-based polyester, and further, a multifilament yarn made of polyester that does not melt at the temperature when the heat-fusible fiber is heat-sealed. Is more preferable. As the thickness of the water-insoluble multifilament yarn constituting the multifilament yarn for loop-shaped engagement element, a multifilament yarn having a total decitex of 4 to 20 filaments of 100 to 400 dtex is preferable, especially 7 A multifilament yarn having a total decitex of ˜12 filaments of 200 to 300 dtex is preferred.

  And the multifilament yarn for loop-like engagement elements must include water-soluble fibers as described above. Examples of water-soluble fibers include various known water-soluble fibers such as cellulose-based, acrylic acid-based, polyvinyl alcohol-based, and alkali-degradable polyester-based materials. Among these, polyvinyl chloride has high tensile strength and excellent processability. Alcohol-based water-soluble fibers are most preferred. Furthermore, since the polyvinyl alcohol-based water-soluble fiber shrinks in the length direction when dissolved, it will give crimps to the water-insoluble fiber constituting the loop, which makes the loop easy to break, This is preferable because it can be easily engaged with the hook-like engagement element.

  The water-soluble fiber is preferably one that dissolves under the condition that the hook-and-loop fastener is immersed in a dyeing bath in order to dye the hook-and-loop fastener, and specifically, one that dissolves in a warm bath at 50 to 130 ° C. The water-soluble fiber may be melted or softened at a temperature at which the weft yarn is melted and the loop-shaped engaging element multifilament yarn is fixed to the base fabric. By melting, the base fabric becomes more flexible.

The water-soluble fiber constituting the loop-shaped engagement element is preferably a multifilament yarn in terms of easy water solubility, and preferably a multifilament yarn having a total detex of 8 to 50 filaments of 50 to 200 dtex, In particular, a multifilament yarn having a total decitex composed of 10 to 45 filaments of 50 to 180 dtex is preferable. When the total decitex of commercially available water-soluble multifilament yarns or the number of filaments constituting the multifilament yarn is low, a plurality of such multifilament yarns can be combined and used.
And as mass ratio of the water-insoluble fiber and water-soluble fiber which comprise the multifilament yarn for loop-shaped engagement elements, the range of 80: 20-50: 50 is preferable.

  The multifilament yarn for the loop-shaped engaging element includes the above-mentioned water-insoluble multifilament yarn, preferably polyester-based multifilament yarn, water-soluble multifilament yarn, preferably polyvinyl alcohol-based water-soluble multifilament. Specifically, a water-insoluble multifilament yarn and a water-soluble multifilament yarn assorted yarn or a twisted yarn are used.

  FIG. 1 schematically shows a loop portion of a loop hook-and-loop fastener according to the present invention. In the figure, 1 is a base fabric, 2 is a loop of a loop-shaped engagement element, and 3 is a non-structuring loop. The water-soluble filament 4 represents a water-soluble filament (water-soluble fiber) constituting a loop, and the water-insoluble multifilament and the water-soluble multifilament are twisted.

  FIG. 2 schematically shows the state of the loop after the water-soluble multifilament is dissolved and removed from the loop surface fastener production machine shown in FIG. The portion occupied by the water-soluble multifilament has disappeared to form a gap (space), and the water-insoluble multifilament has spread, and the loop has become loose. It is easy to match. Furthermore, the portion of the base fabric is also flexible because a space (void) is generated by dissolving and removing the water-soluble fiber.

  The above-mentioned ground warp yarn, ground weft yarn, multi-filament yarn for loop-like engagement element, and monofilament yarn for hook-like engagement element are further added as necessary, and a hook-and-loop fastener production machine is first woven from these yarns. The woven structure of the raw machine is preferably a plain weave with a multifilament yarn for loop engagement elements as a part of the ground warp, and the multifilament yarn for loop engagement elements exists in parallel with the ground warp, It is preferable that the weave structure that rises from the base fabric surface in the middle and forms a loop without straddling the ground warp yarn because the hook-shaped engagement element and the loop-shaped engagement element are easily engaged.

  On the other hand, the monofilament yarn for hook-shaped engagement element exists in parallel with the ground warp yarn, rises from the base fabric surface in the middle of the structure, and the woven structure forming one or more ground warp yarns forms a hook. It is preferable because the cutting work when the one leg of the loop for the engaging element is cut into a hook shape is easy.

  The weaving density of the ground warp is preferably 95 to 125 yarns / cm after the heat treatment, and the weft density of the weft yarn is preferably 10 to 25 yarns / cm after the heat treatment. The mass ratio of the ground weft is preferably 15 to 40% with respect to the total mass of the loop-like engaging element multifilament yarn (excluding water-soluble fibers), the ground warp and the weft constituting the surface fastener.

  Further, the number of driven multifilament yarns for loop engaging elements is preferably about 3 to 6 for 20 ground warp yarns (including multifilament yarns for loop engaging elements). Also in the case of hook and loop mixed surface fasteners, a total of 20 ground warp yarns (monofilament yarns for hook-like engagement elements and loop-like engagement) in total of monofilament yarns for hook-like engagement elements and multifilament yarns for loop-like engagement elements 3 to 6 yarns are preferable with respect to (including multifilament yarns for elements). In the case of a hook and loop mixed surface fastener, the ratio of the number of hook monofilament yarns and the number of driven multifilament yarns for loops is preferably in the range of 1: 2 to 2: 1.

  The hook-and-loop fastener production machine thus obtained is engaged with the sheath component of the core-sheath type heat-fusible fiber, which is then heat-treated, if necessary, to melt the sheath component and simultaneously shrink the weft yarn. The monofilament yarn or multifilament yarn for the element is firmly fixed to the base fabric. This eliminates the need for the backcoat treatment that has been performed with conventional hook-and-loop fasteners, and prevents the problems caused by the adhesive for the backcoat and the problems that the flexibility of the hook-and-loop fastener is impaired. As the temperature at the time of heat treatment, 150 to 250 ° C., which is a temperature at which the heat-fusible fiber melts or softens but the other yarns do not melt, is generally used, and more preferably in the range of 185 to 220 ° C., More preferably, it is the range of 190-210 degreeC.

Further, the density of the loop-shaped engaging element in the loop surface fastener or the total density of the hook-shaped engaging element and the loop-shaped engaging element of the hook / loop mixed surface fastener is the base cloth portion where the engaging element exists. 30 to 140 pieces / cm ² is preferable on the basis of the reference and the size after heat shrinkage. Further, the ratio of the hook-like engaging element and the loop-like engaging element in the case of the hook / loop mixed surface fastener is preferably 1: 2 to 2: 1.

  Then, the loop hook-and-loop fastener raw machine thus obtained (including hook and loop mixed type hook-and-loop fasteners) is treated with hot water or hot water to form a part of the multifilament yarn for the loop engaging element. Dissolve and remove the water-soluble fibers. Preferably, as described above, the dissolution removal of the water-soluble fiber and the dyeing of the hook-and-loop fastener can be performed at the same time by dissolving and removing in the dyeing bath for dyeing the hook-and-loop fastener. Suitable for streamlining.

  The loop hook-and-loop fastener obtained in this way may be brushed on the surface with a needle cloth if necessary, but the loop-constituting multifilament yarn can be separated sufficiently by raising the surface lightly than the conventional brushing treatment. Can do.

With respect to the multifilament yarn constituting the loop portion of the loop surface fastener thus obtained, the proportion of the filament cut at the loop portion is preferably 5% or less, and the loop-shaped engagement element swells. have. Since it is 5% or less, it is possible to sufficiently secure the ratio of hooks that are in a state where the engagement force can be exerted and the filament constituting the loop, and the loop engagement element has a bulge. Since the hook easily enters the filament and the ratio of the hook to the filament is increased, a stronger engagement force is exhibited.
Specifically, the multifilament yarn is not gathered as a single yarn in the loop portion, but the yarns are spread and spread.

  The loop hook-and-loop fastener obtained from the loop hook-and-loop fastener according to the present invention can be used in fields where conventional general hook-and-loop fasteners are used. For example, in addition to shoes, bags, hats, gloves and the like, clothing , Sphygmomanometer, supporters, packing straps, binding tape, various toys, fixing civil engineering and construction sheets, fixing panels and wall materials, fixing solar cells to the roof, fixing electrical components, assembling and dismantling Can be used in a wide range of fields such as free storage boxes, packing cases, accessories, curtains, etc. It is particularly suitable for clothing, shoes, hats, gloves, toys and supporters that require flexibility and engagement.

  Hereinafter, the present invention will be described with reference to examples.

Example 1
The following yarns were prepared as the ground warp and ground weft constituting the surface fabric of the hook-and-loop fastener and the multifilament yarn for the loop-shaped engaging element.
[Ground warp]
・ Multifilament yarn made of polyethylene terephthalate with a melting point of 260 ° C. ・ Total decitex and number of filaments: 167 dtex 30 [weft yarn (multifilament heat fusion yarn made of core-sheath type composite fiber)]
-Core component: Polyethylene terephthalate (melting point: 260 ° C)
-Sheath component: 25 mol% isophthalic acid copolymerized polybutylene terephthalate (softening point: 190 ° C)
-Core-sheath ratio (weight ratio): 70:30
-Total decitex and number of filaments: 24 at 110 dtex-Dry heat shrinkage at 200 ° C: 13%

[Multifilament yarn for loop-like engagement element]
(1) Water-insoluble fiber Polybutylene terephthalate fiber (melting point: 220 ° C)
・ Total decitex and number of filaments: 7 at 265 dtex, twist: 50 T / m, S direction (2) Water-soluble fiber ・ Polyvinyl alcohol-based water-soluble fiber: Kuraray Mint Bar WT-RS56T2 (complete melting temperature 80 ° C.)
-Total decitex and number of filaments: 12 at 56 decitex-Three above water-soluble multifilament yarns (2) are aligned, twisted: 10 T / m in the S direction (3) The above water-insoluble fiber (1) and above Twist the water-soluble fiber (2) in the Z direction with a twist number of 500 T / m

[Loop surface fastener]
Using the above-mentioned ground warp yarn, ground weft yarn and multifilament yarn for loop-like engagement element, plain weave is used as the woven structure, and the weave density (after heat shrinkage treatment) is 55 warp yarns / cm and 22 weft yarns / cm. Woven to be. Then, the multi-filament for loop-shaped engagement element is driven in parallel to the ground warp yarn without straddling the ground warp yarn at a ratio of one to four ground warp yarns, and the loop is formed after the five weft yarns float and sink. A loop was formed on the fabric.

The loop hook-and-loop fastener tape woven under the above conditions is melted only by the sheath component of the ground weft, and further, the ground warp, the multi-filament for loop engaging element (including water-soluble fibers), and the weft The core component was heat treated at 200 ° C. at which the core component was not melted. The ground weft shrunk greatly and the sheath component melted to fuse the neighboring yarn. As a result, the base fabric contracted 11% in the direction of the weft. The resulting fabric was allowed to cool. The obtained loop hook-and-loop fastener had a loop-like engaging element density of 44 pieces / cm ² , and the height of the loop-like engaging element from the base fabric surface was 2.4 mm.

  Both of the loop surface fasteners thus obtained were treated at 135 ° C. for 45 minutes under high pressure conditions allowing PET fibers to be dyed and dyed in deep red with a disperse dye. I was able to. By this dyeing treatment, the water-soluble fibers contained in the multifilament yarn for loop-shaped engagement element were also dissolved and removed.

  The obtained loop hook-and-loop fastener has a space for the multi-filament yarn of the loop-shaped engagement element existing in the base fabric. As a result of observing the loop-shaped engagement element with an optical microscope, the loop-shaped engagement element is None of the constituting filaments were cut (cutting rate: 0%). Further, it was confirmed that the multifilament yarn constituting the loop-shaped engaging element portion was also widely spread. The base fabric of the loop surface fastener is also very flexible, and is extremely suitable for curtains and clothes that require drape.

  Next, the initial engagement force and engagement peeling durability of the obtained loop surface fastener were measured. These woven conditions are shown in Table 1, and the results obtained are shown in Table 2.

  The initial engagement strength (shear: shear strength, peel: peel strength) was measured according to the JIS-L-3416 method, and the peel durability was measured after 3000 peels were repeated. A hook surface fastener (A8693Y.71) manufactured by Kuraray Fastening Co., Ltd. was used as an engagement partner to measure the engagement force and the peeling durability.

As is apparent from the table, the product of the present invention (Example 1) has an initial engagement strength higher than that of the conventional example, and the engagement strength is lower than the initial engagement strength when the engagement / release is repeated 3000 times. However, it can be seen that the engagement strength higher than that of the conventional one is maintained and the peeling durability is excellent.
Further, when the surface of the loop surface fastener was stroked with the palm of the hand, it was extremely flexible and extremely excellent in touch. Furthermore, when the loop hook-and-loop fastener was held in the palm of the hand, it was extremely flexible and there was no feeling of foreign matter.

Comparative Example 1
In Example 1 above, a polybutylene terephthalate-based multifilament yarn consisting of seven filaments with a total decitex of 265 dtex without using water-soluble fibers as a loop-like engagement element. A loop surface fastener was produced by the same method as in Example 1 except that it was used, and was dyed under the same conditions as in Example 1.
The obtained loop hook-and-loop fastener was measured for initial engagement strength and peeling durability in the same manner as in Example 1. The results are shown in Table 2.

  The obtained loop hook-and-loop fastener was observed with an optical microscope. As a result, the filament constituting the loop at the loop-shaped engagement element portion was not cut at all, but compared with that of Example 1, the loop-shaped engagement In the element part, the multifilament yarn is bundled into a single yarn, there is little looseness, there is no swelling, and the base fabric is superior in terms of flexibility compared to the conventional backcoat resin coated. However, it was harder than that of Example 1 and gave a stiff feeling when grasped with the palm.

Comparative Example 2
A loop surface fastener was produced in the same manner as in Example 1 except that water-soluble fibers were not used and the loop-shaped engaging element density of the loop surface fastener was 120 pieces / cm ² . And the surface of the obtained loop hook-and-loop fastener was brushed with a needle cloth, and the loop-shaped engagement element which exists on the surface was comprised, and the multifilament yarn was scattered. The raising conditions were the same as the normal raising conditions.
The initial engagement strength and peel durability of the obtained loop surface fastener were measured by the same method as in Example 1. The results are shown in Table 2.

As a result, the surface fastener of Comparative Example 2 was excellent in the initial engagement strength, but was inferior in terms of peeling durability. Moreover, regarding the flexibility, it was hard as in Comparative Example 1, and was rugged when held in the hand.
As a result of observing the surface where the loop-shaped engagement element of the loop surface fastener is present with an optical microscope, the filaments constituting the loop-shaped engagement element are scattered, but about 10% of them are cut. Some filaments that were not cut also had scratches on the fiber side.

Comparative Example 3
In Example 1 above, a normal multifilament yarn made of 120 dtex polyethylene terephthalate made of 24 filaments instead of the heat fusible fiber is used as the ground weft yarn, and a multi-loop engaging element is used. By the same method as in Example 1 except that water-soluble fibers are not contained as filament yarns, and a polyurethane emulsion is applied to the back side of the base fabric of the loop-shaped engagement element by a solid content of 45 g / m ² spray. A fabric loop surface fastener with a back coat layer was produced.

  As is apparent from Table 2, the comparative example 3 has a hook fastener with considerably poor performance in terms of the performance of the hook-and-loop fastener, and a part of the polyurethane adhesive adhered to the back surface of the loop-like engaging element. It exfoliated and existed as white powder as if dust adhered to the surface, and the appearance was poor. Furthermore, the cloth loop surface fastener itself was much harder than that of Example 1 described above, and was inferior in terms of flexibility. Further, regarding the dyed material, since the back coat layer having a dark color difference exists on the back surface side of the loop-shaped engagement element and the base fabric, the impression of luxury was not given.

DESCRIPTION OF SYMBOLS 1 ... Base fabric 2 ... Loop 3 ... Water-insoluble filament 4 ... Water-soluble filament (water-soluble fiber)

Claims (6)

  A multi-filament yarn for a loop surface fastener in which a large number of loop-shaped engagement element multifilament yarns protrude in a loop shape on the surface of a fabric base fabric, wherein the loop-form engagement element multifilament yarn contains water-soluble fibers A loop hook fastener machine characterized by   The raw machine for loop surface fasteners according to claim 1, wherein the water-soluble fibers are polyvinyl alcohol fibers.   The woven fabric is composed of ground warp yarn, ground weft yarn, and multi-filament yarn for loop engaging element, and the multi-filament yarn for loop engaging element is driven in parallel to the ground warp yarn, and at least a part of the weft yarn The loop hook-and-loop fastener production machine according to claim 1, wherein a heat-fusible fiber is used for the loop surface fastener.   The loop hook-and-loop fastener manufacturing machine according to claim 3, wherein the multi-filament yarn for loop-shaped engagement element is a polyester multifilament yarn and a polyvinyl alcohol water-soluble multifilament yarn.   The manufacturing method of the loop surface fastener which melt | dissolves and removes the water-soluble fiber which comprises the multifilament yarn for loop-shaped engagement elements of the loop surface fastener production machine of Claims 1-4.
A loop surface fastener obtained by removing the water-soluble fibers constituting the loop surface fastener raw machine according to any one of claims 1 to 4, wherein a multi-filament loop portion of the multifilament yarn constituting the loop-shaped engagement element is provided. A loop hook-and-loop fastener in which the percentage of filament fibers that are cut with respect to the filament yarn is 5% or less, and the loop-shaped engagement element has a bulge.