JP6717448B2 - Method for manufacturing surface fastener - Google Patents

Description

The present invention relates to a surface fastener having excellent flexibility. In particular, the use of a special polyester fiber as the weft of the base fabric of the hook-and-loop fastener makes it extremely flexible and has excellent tear resistance, making it an excellent fastener for clothing. Regarding fasteners.

Conventionally, a combination of a surface fastener having a hook-shaped engagement element and a surface fastener having a loop-shaped engagement element, a hook-shaped engagement element and a loop-shaped engagement element together with a button as a means for fixing the front portion or cuffs of clothing. Widely used is a combination of surface fasteners that are mixed with each other.

When the surface fasteners used for these applications are rigid, the texture of the clothing is impaired and the hand feel deteriorates, so that the surface fasteners used for clothing are required to be particularly flexible. The Rukoto. Furthermore, since clothing is used for a long period of time, it is required that the surface fastener used for clothing should not tear during use.

The surface fastener is roughly classified into a large number of hook-shaped engaging elements and/or loop-shaped engaging elements made of the same thread for engaging elements on the surface of a woven fabric base cloth made of warp threads, weft threads and thread for engaging elements. There are two types of woven surface fasteners and molded surface fasteners in which hook-shaped engaging elements made of the same resin are present on the surface of the substrate made of resin. The hook-and-loop fastener made of woven fabric is generally widely used because of the fact that the engaging force does not decrease even if the sewing is performed, it is hard to tear from the sewing machine hole even if it is attached to clothing by sewing, and it has excellent flexibility. There is.

Conventionally, such a woven surface fastener has a urethane-based fastener on the back surface of the base cloth in order to prevent the engaging element thread woven in the base cloth from being pulled out from the base cloth during engagement release. It is common that an acrylic adhesive resin (back coat resin) is applied and the thread for the engaging element is fixed to the base fabric. A woven fabric in which such a back coat resin is applied to the back face of the base fabric. The surface fastener has a drawback that it is rigid because the base cloth is fixed by the applied back coat resin.

As such a woven surface fastener using no back coat resin, the warp yarn, the weft yarn, and the engaging element yarn are all polyester yarns, and the weft yarn includes a core-sheath type heat-fusible fiber, and further engages. A surface fastener has been proposed in which the root of the element is fusion-bonded and fixed by a weft (for example, refer to Patent Document 1 or Patent Document 2 (Claims)).
The surface fasteners described in these references are superior in flexibility because the backcoat resin is not applied, as compared with the conventional surface fastener in which the back surface is coated with the backcoat resin.

International Publication No. 2005/122817 (Claims) International Publication No. 2007/074791 (Claims)

An object of the present invention is to provide a woven surface fastener which is more highly flexible and suitable for a field of use that requires a high degree of flexibility for clothing. Further, the present invention, even though using the heat-fusible core-sheath type fiber as the weft, is more difficult to tear than the surface fastener obtained by the method described in the above-mentioned reference, and therefore, by sewing or the like. Another object of the present invention is to provide a woven surface fastener that is even more durable when attached to clothing or the like.

That is, according to the present invention, a hook-shaped engaging element and/or a loop-shaped engaging element made of the thread for the engaging element is present on the surface of the base fabric made of the warp, the weft and the thread for the engaging element. A method for manufacturing a surface fastener in which the weft yarn and the engaging element yarn are both polyester-based yarns, the weft yarn includes a core-sheath type heat-fusible fiber, and the root of the engaging element is fused and fixed by the weft yarn. In the above, as the weft, a fiber-forming polyester is melt-spun from a spinneret, and the spun filament is cooled to a temperature not higher than the glass transition point of the sheath component and is not wound up, and subsequently run in a heating zone. A multi-filament yarn produced by a method of drawing and heat-treating and then winding at a take-up speed of 3000 m/min or more is used.

And preferably, the engaging element is a loop-shaped engaging element composed of a multifilament and a hook-shaped engaging element composed of a monofilament, and both the loop-shaped engaging element and the hook-shaped engaging element are mixed on the surface of the base cloth. And a method for manufacturing the above-mentioned surface fastener.
In the present invention, the engagement element is a loop-shaped engagement element composed of a multifilament and a hook-shaped engagement element composed of a monofilament, wherein the loop-shaped engagement element is on the surface of the base cloth and the hook-shaped engagement element is a base material. It is a method for manufacturing the above-mentioned surface fastener that is present on the back surface of the cloth.

A feature of the present invention is that as a weft, a fiber-forming polyester is melt-spun from a spinneret, and the spun yarn is once cooled to a temperature not higher than the glass transition point of the sheath component and continuously heated without being wound. It is intended to use a multifilament yarn composed of a heat-fusible filament having a polyester-sheath type cross section, which is produced by a method of running in a zone, drawn and heat treated, and then wound up at a take-up speed of 3000 m/min or more.

Generally, when a multifilament yarn composed of a core-sheath type heat-fusible filament is used as the weft yarn, when the heat fusion is performed, the sheath components of the multifilament yarn are fused and the filaments constituting the multifilament are agglomerated. As a result, the multifilament yarn becomes a rigid single yarn, and such a yarn cannot be easily separated. However, when the multifilament yarn used in the method of the present invention is heat-sealed, it is tentatively a sheath component. The threads are fused and glued to form a single thread, but when force is applied, they are easily peeled off to form a plurality of threads, and flexibility is obtained. Furthermore, since it is easily peeled off and separated into a plurality of threads, even if a force is applied to the surface fastener, the force is dispersed, the surface fastener is less likely to tear, and the durability is excellent.
Therefore, in sewing applications, supporters, etc., it is excellent in softness and fragility of the sewn portion. Further, when the surface fastener of the present invention is sewn on clothes, the surface fastener and the surface fastener of the clothes are peeled off due to the peeling of the sheaths of the multifilaments constituting the weft due to the stress associated with the water flow of washing and daily clothing. Has excellent familiarity, adhesion, and followability, and reduces the discomfort of the surface fastener.

The reason why the multifilament yarn used in the method of the present invention is easily peeled off and separated into a plurality of yarns even if it is fused is not necessarily clear, but by the special method as described above. It is expected that the crystal size, molecular orientation, etc. of the produced multifilament yarn influences.

It is a schematic diagram of a cross section of an example of a hook surface fastener of the surface fasteners obtained by the method of the present invention. It is a schematic diagram of a cross section of an example of a loop surface fastener of the surface fasteners obtained by the method of the present invention. FIG. 4 is a schematic cross-sectional view of an example of a hook/loop mixed type surface fastener of the surface fasteners obtained by the method of the present invention. FIG. 3 is a schematic cross-sectional view of an example of a surface fastener having a loop on one side and a loop on the opposite side of the surface fastener obtained by the method of the present invention. It is the figure which showed typically the manufacturing apparatus of the multifilament thread|yarn used for the manufacturing method of this invention. It is the figure which showed typically an example of the manufacturing apparatus of the conventional general multifilament thread. It is the figure which showed typically another example of the manufacturing apparatus of the conventional general multifilament thread. It is the figure which showed typically another example of the manufacturing apparatus of the conventional general multifilament thread.

In the method of the present invention, the polyester-based multifilament yarn used as the weft is, as described above, melt-spun the fiber-forming polyester from the spinneret, and the spun yarn is once cooled to a temperature below the glass transition point of the sheath component. Then, the multifilament yarn is manufactured by a method in which the multifilament yarn is continuously run in the heating zone without being wound up, drawn and heat treated, and then taken up at a take-up speed of 3000 m/min or more and wound up.

Conventionally, as a method for producing a polyester-based multifilament yarn, as shown in FIG. 6, a fiber-forming polyester is melt-spun through a spinneret, and once undrawn (a pair of rollers (6 and 7) is used). UDY) is wound on a winder (8), and the undrawn yarn (UDY) wound is drawn between a pair of rollers (11 and 12) having different speeds to draw a drawn multifilament yarn (FOY). The method of obtaining is common.

Further, as shown in FIG. 7, the undrawn yarn spun from the spinneret (5) is continuously drawn between the heating rollers (14 and 15) without being wound up, that is, the spinning process and the drawing process are directly connected. A method of producing a multifilament yarn by drawing in a step (SDY), and as shown in FIG. 8, until the spun yarn is cooled instead of being drawn between a pair of rollers (6 and 7). There is a method (DSY) in which a multifilament is directly drawn at a high speed of 5000 m/min or more to produce a multifilament.

However, in the case of the polyester-based multifilament yarns obtained by these conventional methods, the obtained core-sheath type heat-fusible multifilament yarn is obtained by fusing the sheath components together to form a single yarn. Is difficult to peel off even if force is applied, and it is difficult to separate into multiple threads. On the other hand, the core-sheath type heat-fusible polyester-based multifilament yarn used in the method of the present invention, even if the sheath components are once fused, peeling easily occurs by applying a force, Break up into threads.

Thus, as shown in FIG. 5, the core-sheath type heat-meltable polyester-based multifilament yarn used in the method of the present invention is first formed into a core-sheath type polyester-based yarn melted and discharged from the spinneret (5). After being cooled to a temperature below the glass transition point of the sheath component by applying cooling air or the like, it is continuously introduced into the non-contact type heating device (13) without being wound and stretched, and a winding speed of 3000 m/min or more. Is wound up in.

The distance from the spinneret outlet (5) to the inlet of the heating device (13) is preferably in the range of 0.5 to 3 m, and the length of the heating device (13) is 1.0 to in consideration of the stretchability of the yarn. A range of 2.0 m is preferred. The temperature of the heating device (13) is 120° C. or higher in consideration of the fiber physical properties, and particularly 140° C. to a temperature at which the sheath components do not stick to each other, for example, 10° C. or lower than the softening temperature of the sheath component, and preferably 15° C. or lower. .. As a specific example of the heating device (13), a non-contact type heater, for example, a pipe heater is preferable.

After the oil agent is applied to the yarn thus drawn in the heating device by an oil agent applying device (10) such as a guide oiling system, it is continuously taken up by two pairs of rollers (6 and 7), and It is wound by the winding device (8). The take-up speed is 3000 m/min or more in view of physical properties and the like, and preferably 3500 m/min or more and 6000 m/min or less. The polyester core-sheath type heat-fusible multifilament yarn manufactured by such a manufacturing method is sold, for example, by Kuraray Co., Ltd. under the trade name Clavera CR910.

The thickness of the core-sheath type heat-fusible polyester-based multifilament yarn produced by such a method as a weft yarn is a multifilament yarn having a total decitex of 12 to 72 filaments of 75 to 300 decitex. A multifilament yarn having a total decitex of 18 to 60 filaments of 100 to 250 decitex is particularly preferred. Of course, in the case where one multifilament yarn is within the above range, a plurality of multifilament yarns may be arranged and used so as to fall within the above range.

The weft yarn is a heat-sealable multifilament yarn having a core-sheath cross section in which the sheath component is a heat-sealing component. Since the weft thread is heat-fusible, it is possible to firmly fix the engaging element thread to the base cloth and prevent the engaging element thread from being pulled out from the base cloth as in the conventional surface fastener. 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 for the purpose of cleaning.

It is possible to fix the engaging element thread to the base cloth by using a heat-fusible multifilament thread instead of the weft thread, but the engaging element thread is driven into the base cloth in parallel with the warp thread. Therefore, the warp yarn has far fewer crossing points with the engagement element yarn than the weft yarn. Therefore, when the heat-fusible multifilament yarn is used only as the warp yarn, the engagement element yarn is firmly attached to the base fabric. Hard to be fixed.
When the warp is a heat-fusible multifilament yarn, it is difficult to keep the tension applied to the running base fabric constant during continuous production of a surface fastener, and a continuous production of a surface fastener with constant quality is stable. It is easy to do.

As the core-sheath type heat-fusible multifilament yarn, the root of the hook-shaped engaging element monofilament thread or the loop-shaped engaging element multifilament thread can be firmly fixed to the base fabric by melting the sheath component. A polyester-based multifilament yarn having a cross-section of a core-sheath type in which a core component does not melt under the condition of heat-treating the surface fastener but a sheath component melts is used.

Specifically, polyethylene terephthalate is used as a core component, and a large amount of a copolymerization component typified by isophthalic acid, adipic acid, etc. is copolymerized, for example, 20 to 30 mol% to significantly lower the melting point or softening point. A typical example is a core-sheath type polyester multifilament yarn containing a copolymer polyethylene terephthalate as a sheath component.

The melting point or softening point of the sheath component is 150 to 200° C., and is 20 to 120° C. lower than the melting point of the warp yarn, the core component, the monofilament yarn for hook-like engaging elements or the multifilament yarn for loop-like engaging elements. preferable. The cross-sectional shape of the core-sheath heat-fusible fiber may be a concentric core sheath, an eccentric core sheath, a single core sheath, or a multi-core sheath. Preferably, it is a concentric core-sheath of 1 core-core sheath.

Furthermore, the proportion of the core-sheath type heat-fusible fibers in the fibers constituting the weft is particularly the case where all of the weft yarns are formed of substantially core-sheath heat-fusible multifilament yarns, that is, When the weft yarn is a multi-filament yarn composed of a core-sheath type heat-fusible filament, the hook-shaped engaging element yarn and the loop-shaped engaging element yarn are firmly fixed to the base cloth. Therefore, it is preferable.

When the fibers that make up the weft are not in the core-sheath cross-sectional shape, and the entire fiber cross-section is formed of a heat-fusible polymer, the heat-fusible polymer that has melted and re-hardened becomes brittle and prone to cracking. In such a case, the base cloth is likely to be torn from the sewing thread portion. Therefore, the heat-fusible fiber needs to contain a resin that is not heat-bonded as a core component. And, the weight ratio of the core component and the sheath component is preferably in the range of 20:80 to 80:20, and particularly preferably in the range of 30:70 to 70:30.

Furthermore, in order to firmly fix both the hook-shaped engaging element thread and the loop-shaped engaging element thread to the base cloth, the heat-fusible multifilament thread used as the weft thread is heat-fused and the fiber is It is preferable that the roots of the hook-shaped engaging element and the loop-shaped engaging element are tightened from both sides by themselves contracting, and for that purpose, the heat-fusible multifilament yarn used as the weft yarn undergoes large heat contraction under heat treatment conditions. The resulting fibers are preferred. Specifically, fibers having a dry heat shrinkage of 8 to 20% at 200° C. are preferably used, and fibers having the same shrinkage of 10 to 18% are particularly preferable.

In the method of manufacturing a surface fastener of the present invention, the engaging element yarn is woven into the base fabric in parallel with the warp yarn. And the thread for the engaging element protrudes in a loop shape from the surface of the base cloth in places on the surface side of the base cloth, the loop shape is fixed by heat treatment, and in the case of the hook-like engaging element, one leg side of the loop is cut, It becomes a hook shape. In the case of the loop-shaped engaging element, it is used as a hook-and-loop fastener while maintaining the loop shape without being cut.

The hook-shaped engaging element is formed of a monofilament thread for the hook-shaped engaging element, and the loop-shaped engagement element that is an engaging partner of the hook-shaped engaging element is formed of a multi-filament thread.
These threads do not cause waviness (the base fabric surface of the surface fastener rises and falls irregularly and does not become a horizontal surface) due to heat, water absorption and moisture absorption, and also from the viewpoint of excellent heat fusion property. Further, from the viewpoint of excellent shape fixing property by heat, it is necessary that they are substantially composed of polyester resin.

BACKGROUND ART Conventionally, yarns made of polyamide fibers such as nylon 6 and nylon 66 have been widely and generally used for surface fasteners using woven fabric as a base fabric, but when polyamide fiber yarns are used, The shape of the base cloth changes due to water absorption/moisture absorption or heat, and in some cases, the shape of the base cloth is damaged due to moisture absorption, water absorption, or heat treatment, resulting in a deterioration of the shape. There is a big problem that the quality and quality of the product are impaired, and there is also a problem that the most important engaging force as a surface fastener is not necessarily high, and it is difficult to fuse by heat. There are also problems.

For this reason, in the method of the present invention, the fibers constituting the warp yarn, the weft yarn, and the yarn for the engagement element are mainly made of polyester resin. The polyester-based resin is a polyester mainly composed of ethylene terephthalate units or a polyester mainly composed of butylene terephthalate units, and is a polyester obtained mainly by a condensation reaction of terephthalic acid and ethylene glycol or a condensation reaction of terephthalic acid and butanediol. Is. More preferably, the warp yarns other than the weft yarns and the engaging element yarns are formed of polyethylene terephthalate homopolymer or polybutylene terephthalate homopolymer.

In any case, the components constituting the warp yarn, the weft core portion and the engaging element yarn are melted at the heat treatment temperature for fusing the sheath component of the core-sheath type heat fusible fiber constituting the weft described later. It is preferable that polyethylene terephthalate-based polyester or polybutylene terephthalate-based polyester having a melting point which does not exist is the main component constituting the yarn. If necessary, other fibers may be mixed with cotton, mixed fibers, or drawn in the polyester fiber.

The warp is preferably a multifilament thread, and the thickness of the multifilament thread constituting the warp is preferably a multifilament thread having a total decitex of 16 to 96 filaments of 75 to 250 decitex, and particularly 24 to 48. A multifilament yarn having a total decitex of 100 filaments of 100 to 200 decitex is preferable.

The hook-shaped engaging element is required to have so-called hook shape retention and rigidity, in which the hook shape is not extended by a light force, and for that purpose, a thick monofilament yarn made of synthetic fiber is used. In the present invention, as the monofilament yarn, a polyester formed from polyethylene terephthalate-based polyester or polybutylene terephthalate-based polyester, which is particularly excellent in hook shape retention, and which is not melted at the temperature when the heat-fusible fiber is heat-sealed. A monofilament yarn made of is used.

The thickness of the monofilament thread for hook-shaped engaging elements made of such polyethylene terephthalate polyester or polybutylene terephthalate polyester is preferably 0.13 to 0.40 mm, more preferably 0.18 to 0.40 mm. It is 0.35 mm.

The loop-shaped engaging element yarn is also composed of polyethylene terephthalate polyester or polybutylene terephthalate polyester, like the hook-like engaging element, and is a polyester that does not melt at the temperature at which the heat-fusible fiber is heat-sealed. A multifilament yarn consisting of is preferred. As for the thickness of the multifilament yarn constituting the loop-shaped engaging element yarn, a multifilament yarn having a total decitex of 5 to 15 filaments of 150 to 300 decitex is preferable, and particularly from 8 to 12 filaments. A multifilament yarn having a total decitex of 160 to 280 decitex is preferred.

First, a woven fabric for a hook-and-loop fastener is woven from the above-mentioned warp yarn, weft yarn, monofilament yarn for hook-shaped engaging elements or multifilament yarn for loop-shaped engaging elements.
As the woven structure of the woven fabric, a plain weave in which a monofilament thread for hook-shaped engaging elements or a multifilament thread for loop-shaped engaging elements is part of the warp is preferable, and these engaging element threads are present in parallel with the warp threads. Meanwhile, in the case of a hook surface fastener, a woven structure that rises from the base fabric surface in the middle of the structure, jumps 1 to 3 warps and slips between warps while forming a loop in the case of a hook surface fastener. Is a weave design that forms a loop at a location that does not straddle warp threads but straddles weft threads, and in the case of hook and loop mixed surface fasteners, a weave design that satisfies both of these is for hook-shaped engaging elements. This is preferable because one side portion of the loop can be efficiently cut and the hook-shaped engaging element and the loop-shaped engaging element are easily engaged.

The weaving density of the warp is preferably 45 to 90 threads/cm after the heat treatment, and the weaving density of the weft is preferably 15 to 30 threads/cm after the heat treatment. The weight ratio of the weft is preferably 15 to 40% with respect to the total weight of the hook-shaped engaging element thread or the loop-shaped engaging element thread, the warp thread and the weft thread constituting the surface fastener.

The number of the hook-shaped engaging element monofilament threads and the loop-shaped engaging element multifilament threads is 20 warps (including the hook-shaped engaging element monofilament thread or the loop-shaped engaging element multifilament thread, respectively). 3) to about 8 are preferable. In the case of a hook/loop mixed surface fastener, a total of 20 warp threads (monofilament thread for hook-shaped engaging element and multifilament thread for loop-shaped engaging element and monofilament thread for loop-shaped engaging element and loop-shaped engaging element) (Including the multifilament yarn for use in the invention), 3 to 8 are preferable, and the number ratio of the monofilament yarn for hook-like engaging elements and the multifilament yarn for loop-like engaging elements is in the range of 33:67 to 67:33. preferable.

The surface fastener fabric thus obtained is then heat-treated to melt the sheath component of the core-sheath type heat-fusible multifilament yarn that constitutes the weft yarn, and at the same time shrink the weft yarn to produce an engaging element. Firmly fix monofilament thread or multifilament thread to the base cloth. This eliminates the need for the backcoat treatment that has been performed with conventional surface fasteners, and the problems that the flexibility of the surface fastener is lost due to the backcoat resin and the breathability of the surface fastener is impaired. Can be prevented. Furthermore, the loop shape of the hook-shaped engaging element is fixed by the heat during this heat treatment, and the hook shape is maintained even after the one leg of the hook-shaped engaging element is cut to form the hook-shaped engaging element. Engagement strength can be obtained.

The temperature during the heat treatment is such that the sheath component resin of the heat-fusible multifilament yarn is melted or softened, but the other yarns are not melted, and the monofilament yarn for hook-shaped engaging elements is heat-set. A temperature of 150 to 230° C. is generally used, more preferably 180 to 220° C., further preferably 185 to 210° C.

Next, one leg side portion of the loop leg portion for the hook-shaped engaging element protruding from the surface of the woven fabric for surface fastener thus heat-treated is cut into a hook-shaped engaging element. As a cutting device used to cut one side of the hook-shaped engaging element loop, one leg of the hook-shaped engaging element loop of the cloth for hook hook-and-loop fastener running in the ground warp direction has two fixed blades. A cutting device having a structure in which the movable cutting blade reciprocates between them is preferable, and therefore, the loop for the hook-shaped engaging element is formed at a place straddling the ground warp as described above. It is preferable that only one leg of the loop can be cut easily.

The height of the hook-shaped engaging element is 1.3 to 3.0 mm from the base cloth surface, and the height of the loop-shaped engaging element is 1.8 to 3.5 mm from the base cloth surface. It is preferable in terms of the resultant force and in that the engaging element is hard to fall down.

The density of the hook-shaped engaging elements in the hook surface fastener, the density of the loop-shaped engaging elements in the loop surface fastener, and the total element density of the hook-shaped engaging elements and the loop-shaped engaging elements in the hook/loop mixed surface fastener are 30 to 80 pieces/cm ² are preferable for both the base fabric portion where the composite element is present and the width after heat shrinkage. In the hook/loop mixed 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.

The surface fastener obtained by the method of the present invention is a hook surface fastener having a hook-shaped engaging element (2) on the surface of a base cloth (1) as shown in FIG. As described above, even if the loop surface fastener has the loop-shaped engaging element (3), as shown in FIG. 3, both the hook-shaped engaging element (2) and the loop-shaped engaging element (3) are provided. Even with a hook/loop mixed surface fastener that is provided on the front surface of the base cloth (1), as shown in FIG. 4, a loop shape is formed on either the front surface or the back surface of the base cloth (1). It may be a double-sided fastener having the engaging element (3) and the hook-like engaging element (2) on the other surface.

The surface fastener obtained by the method of the present invention can be used in the fields of application where conventional general surface fasteners are used, but is particularly excellent in flexibility and tear resistance, and is excellent in sewability. Suitable for clothing that requires high resistance and tear resistance.

Hereinafter, the present invention will be described based on examples. In the examples, the flexibility of the surface fastener was measured by the heart loop method (JIS-L-1096 D method), and the tear resistance was measured by the strength of tearing the ears in the longitudinal direction.
Example 1
The following yarns were prepared as warp yarns and weft yarns, multifilament yarns for loop-shaped engaging elements and monofilament yarns for hook-shaped engaging elements, which constitute the base fabric of the surface fastener.
[Warp]
-Multifilament yarn made of polyethylene terephthalate with a melting point of 260°C-Total decitex and number of filaments: 30 at 167 dtex

[Weft (multifilament heat-bonded yarn consisting of core-sheath type composite fiber)]
・Core component: polyethylene terephthalate (melting point: 260° C.)
・Sheath component: isophthalic acid 25 mol% copolymerized polyethylene terephthalate
(Softening point: 190°C)
・Core-sheath ratio (weight ratio): 70:30
・Total decitex and filament number: 24 at 110 dtex ・Dry heat shrinkage at 200°C: 12%
In this weft, the core component polymer and the sheath component polymer are melt-spun from a core-sheath type composite spinneret, and subsequently, as shown in FIG. 5, cooling air at a temperature of 25° C. is applied at a speed of 0.5 m/min. After being blown from the side to the spun yarn and cooling the yarn to 55° C. (temperature below the glass transition point of the sheath component), the length was set 1.2 m below the spinner without winding. It is drawn through a tube heater (internal temperature 170° C.) having a diameter of 0 m, an inlet diameter of 5 mm, and an outlet diameter of 10 mm, and is stretched in the same heater to feed oil to the yarn coming out of the heater, and 4500 m through two rollers. The product was manufactured by a method of winding at a take-up speed of 1 minute/minute (Kuraray CR910 manufactured by Kuraray Co., Ltd.).

[Multi-filament for loop-shaped engaging elements]
・Polybutylene terephthalate fiber (melting point: 220°C)
・Total decitex and number of filaments: 7 at 265 dtex [monofilament for hook-shaped engaging element]
・Polyethylene terephthalate fiber (melting point: 260°C)
・Fineness: 390 dtex (diameter: 0.19 mm)

[Manufacture of loop fasteners]
The above-mentioned warp and weft are arranged in two, and a plain weave is used as the woven structure by using the multifilament yarn for the loop-shaped engaging element, and the weaving density (after heat shrinking treatment) is 55 warps/cm and 22 wefts. /Cm was woven. Then, the multi-filament for a loop-shaped engaging element is struck at a ratio of 1 out of 4 warps in parallel with the warp without straddling the warp, and then the 5 wefts are floated and set and then looped on the base fabric. Formed.

In the loop surface fastener tape woven under the above conditions, only the sheath component of the weft is heat-melted, and the warp, the loop-engaging element multifilament, and the core component of the weft are temperatures at which the heat-melting does not occur. Heat treatment was performed at 200°C. As a result, the weft was shrunk, the base fabric was shrunk by 11% in the weft direction, and the sheath component was melted to fuse the yarns existing in the neighborhood. Then, the obtained fabric was cooled. The obtained loop hook-and-loop fastener had a density of loop-shaped engaging elements of 44/cm ² , and the height of the loop-shaped engaging elements from the base fabric surface was 2.4 mm.

[Manufacture of hook surface fasteners]
In the method for manufacturing a loop surface fastener, the engaging element yarn is changed to the above monofilament yarn, a plain weave is used as a woven structure, and a weaving density (after heat shrinking treatment) is 55 warps/cm, 20 wefts/cm. Weaved to be A hook-like engaging element monofilament is driven in parallel with the warp yarn at a ratio of one to four warp yarns, and five weft yarns are floated/sunk and then straddled over three warp yarns to form a loop at the straddled position A loop was formed on the base fabric.

The tape for hook hook-and-loop fastener thus woven was heat-treated in the same manner as in the method for manufacturing the loop hook-and-loop fastener. As the weft contracted, the sheath component melted and the yarns existing in the vicinity were fused. As a result, the base cloth contracted 9% in the weft direction. Then, after cooling the obtained fabric, one leg portion of the loop for hook-shaped engaging element was cut to form a hook-shaped engaging element. The obtained hook surface fastener had a density of hook-shaped engaging elements of 42 pieces/cm ² , and the height of the hook-shaped engaging elements from the base cloth surface was 1.8 mm.

The hook surface fastener and the loop surface fastener manufactured by the above method are extremely flexible, and the flexibility of each of them was measured by the heart loop method (JIS-L-1096 D method). It was 1 mm and 47.7 mm. When these hook-and-loop fasteners were repeatedly washed and dried 10 times and the base cloth of the hook-and-loop fastener was observed with a microscope, both the hook hook-and-loop fastener and the loop hook-and-loop fastener were divided into a plurality of weft yarns. It was found that the thread forming the engaging element was sufficiently grasped and firmly joined without being disengaged at all.

These hook-and-loop fasteners were attached to the cuffs of work clothes by sewing instead of buttons. As a result, because the hook-and-loop fastener is attached to the cuff, the flexibility of the attached portion is different from that of other places even if the wearer touches the cuff and does not recognize that the hook-and-loop fastener is attached. Almost changed. Moreover, as a result of washing and drying such work clothes 10 times, the hook-and-loop fastener becomes more flexible, and the hook-and-loop fastener is integrated with the cloth forming the cuffs, and the presence of the hook-and-loop fastener may impair the texture of the cloth. Almost never happened.

Further, since the heat-fusible fiber is used for the weft, it was feared that the weft would be cut and the surface fastener would be easily torn, but in reality, as a method of measuring tear resistance, the ear portion was set in the longitudinal direction. The torn strength was 2.3 to 2.8 kg, which was extremely excellent. Then, the engagement and release were repeated 3000 times, but the surface fastener was not torn from the perforations during sewing, and the durability was excellent.

Comparative Example 1
In the method for manufacturing the hook surface fastener and the loop surface fastener of Example 1, the following polyester multifilament yarn (polyester core-sheath type multifilament yarn 99T24- manufactured by Unitika Ltd.) is used as the polyester-based core-sheath type multifilament yarn used as the weft yarn. A hook surface fastener and a loop surface fastener were manufactured in the same manner except that S6V0) was used.
[Weft (multifilament heat-bonded yarn consisting of core-sheath type composite fiber)]
・Core component: polyethylene terephthalate (melting point: 260° C.)
・Sheath component: isophthalic acid 25 mol% copolymerized polyethylene terephthalate
(Softening point: 190°C)
・Core-sheath ratio (weight ratio): 70:30
-Total decitex and filament number: 24 at 99 dtex-Dry heat shrinkage at 200°C: 13%
-Manufacturing method: SDY method As in the case of Example 1, two wefts were used together.

The flexibility of each of the obtained hook surface fastener and loop surface fastener was 34.6 mm and 36.8 mm when the bending resistance was measured by the heart loop method (JIS-L-1096 D method). The fastener was inferior in flexibility to that of Example 1. Similar to Example 1, these surface fasteners were repeatedly washed and dried 10 times, and the base cloth of the surface fastener was observed with a microscope. As a result, both hook surface fasteners and loop surface fasteners contained only one weft thread. It remained fused to the yarn.

The hook surface fastener and the loop surface fastener of these comparative examples were used for the cuffs of work clothes in the same manner as in Example 1 above. The work clothes obtained were tentatively soft, but were harder than those of Example I, and of the 30 wearers, 23 of the wearers of Example 1 were more flexible and suitable for clothes. I answered. Further, as a method for measuring the tear resistance of this surface fastener, the strength of tearing the ears in the longitudinal direction was 1.5 to 2.1 kg, which was inferior to that of Example 1.

Comparative example 2
In Example 1, the polyester-based core-sheath type multifilament yarn used as the weft in the method for manufacturing the hook surface fastener and the loop surface fastener is the following polyester multifilament yarn (polyester core-sheath type multifilament yarn 197T48- manufactured by Unitika Ltd.). A hook surface fastener and a loop surface fastener were manufactured in the same manner except that the step was changed to S610).

[Weft (multifilament heat-bonded yarn consisting of core-sheath type composite fiber)]
・Core component: polyethylene terephthalate (melting point: 260° C.)
・Sheath component: isophthalic acid 25 mol% copolymerized polyethylene terephthalate
(Softening point: 190°C)
・Core-sheath ratio (weight ratio): 70:30
-Total decitex and number of filaments: 48 at 197 dtex-Dry heat shrinkage at 200°C: 13%
-Manufacturing method: UDY-FOY method Since the total decitex is 197 dtex, only one was used.

The flexibility of each of the obtained hook surface fastener and loop surface fastener was 35.5 mm and 35.0 mm when the bending resistance was measured by the heart loop method (JIS-L-1096 D method). Like Example 1, the flexibility was inferior to that of Example 1. Washing and drying were repeated 10 times for these surface fasteners as in Example 1, and the base cloth of the surface fasteners after that was observed under a microscope. As a result, both hook surface fasteners and loop surface fasteners showed that the weft yarns constituting the base cloth were 1 It was found to remain adhered to the book threads.
These hook surface fasteners and loop surface fasteners were used for the cuffs of work clothes in the same manner as in Example 1 above. The obtained work clothes were tentatively soft as in Comparative Example 1, but were harder than those in Example 1. Further, as a method of measuring the tear resistance of this surface fastener, the strength of tearing the ears in the longitudinal direction was 2.0 to 2.1 kg, which was inferior to that of Example 1.

Comparative Example 3
In the above-described Example 1, in the method for manufacturing the hook surface fastener and the loop surface fastener, the polyester-based core-sheath type multifilament thread used as the weft thread is replaced with the following polyester multi-filament thread (polyester core-sheath type multifilament thread manufactured by Kuraray Co., Ltd.). A hook surface fastener and a loop surface fastener were manufactured in the same manner except that the change was made to ).

[Weft (multifilament heat-bonded yarn consisting of core-sheath type composite fiber)]
・Core component: polyethylene terephthalate (melting point: 260° C.)
・Sheath component: isophthalic acid 25 mol% copolymerized polyethylene terephthalate
(Softening point: 190°C)
・Core-sheath ratio (weight ratio): 70:30
-Total decitex and filament number: 24 at 110 dtex-Dry heat shrinkage at 200°C: 9%
・Manufacturing method: DSY method (winding speed: 5500 m/min)

The flexibility of each of the obtained hook surface fastener and loop surface fastener was 34.8 mm and 35.3 mm when the bending resistance was measured by the heart loop method (JIS-L-1096 D method). Like Example 1, the flexibility was inferior to that of Example 1. Further, as a method of measuring the tear resistance of this surface fastener, the strength of tearing the ears in the longitudinal direction was 1.7 to 2.0 kg, which was inferior to that of Example 1. Further, these surface fasteners were washed and dried 10 times in the same manner as in Example 1, and the base cloth of the surface fastener was observed with a microscope. As a result, both hook surface fasteners and loop surface fasteners showed that the weft yarns constituting the base cloth were 1 It was found to be adhered to the book.

Example 2
Using the same warp, weft, monofilament yarn for hook-shaped engaging elements and multifilament yarn for loop-shaped engaging elements as in Example 1, a hook/loop mixed type surface fastener was produced. That is, the monofilaments for hook-shaped engaging elements and the loops are formed by repeating the arrangement in which the hook-shaped engaging elements are provided in two rows in the longitudinal direction and the loop-shaped engaging elements are provided in two rows adjacent to each other by using the above-mentioned four kinds of threads. The multifilaments for the linear engaging elements are arranged. Further, the loop-shaped engaging elements are arranged so as to be in contact with the loop-shaped engaging elements when touching the surface so that the loop-shaped engaging elements are located at both outer ends. The woven structure is plain weave, the weaving density is 72 warps/cm, 18 wefts/cm, 8 warps are 2 mono-filaments for hook-like engaging elements, and 8 warps are 2 warps. The multifilaments for loop-shaped engaging elements were individually driven.

The tape woven under the above conditions was heat-treated at 190°C. The weft yarn contracted greatly and the sheath component melted to fuse the yarns existing in the neighborhood. As a result, the base fabric was largely shrunk in the weft direction and contracted 11% in the weft direction. Then, after cooling the obtained fabric, one leg of the loop for the hook-shaped engaging element (the side away from the loop-shaped engaging element) was cut to form the hook-shaped engaging element.

The hook-and-loop mixed-type surface fastener thus obtained had a hook-like engaging element density of 30 pieces/cm ² , a loop-like engaging element density of 31 pieces/cm ² , and a hook-like engaging element and a loop-like engaging element. The heights of the elements from the base cloth surface were 1.8 mm and 2.3 mm, respectively.

When the engaging element surface of the obtained hook and loop mixed type surface fastener was touched by hand, it was extremely soft to the touch, and the base fabric itself was also extremely flexible, when sewn to the name tag attachment place on the chest of work clothes, There was no impression that the rigid sheet of the surface fastener was integrated, and it did not impair the texture of the work clothes at all. Furthermore, when the name tag holders having the hook surface fasteners attached to the back side were overlapped and the engagement and peeling were repeated, there was no tearing from the perforations at the time of sewing. When the hook and loop mixed type surface fastener was repeatedly washed and dried 10 times and the base cloth of the surface fastener was observed with a microscope, both hook surface fasteners and loop surface fasteners contained multiple weft yarns. I found out that I was parting.

Example 3
In the above Example 1, the same warp, weft, and multifilament yarn for loop-shaped engaging elements were used as the monofilament yarn for hook-shaped engaging elements, except that they were replaced with the following ones. A double-sided fastener having a hook-shaped engaging element and a loop-shaped engaging element on the back surface was manufactured.
[Monofilament thread for hook-shaped engaging elements]
・Polybutylene terephthalate fiber (melting point: 220°C)
・Fineness: 410 dtex (diameter: 0.20 mm)
That is, using the above-mentioned four kinds of yarns, the region (A) where the hook-shaped engaging element exists and the region where the loop-shaped engaging element exists on the back surface adjacent to the region (A) under the following conditions. A double-sided engagement type surface fastener having (B) alternately was manufactured.

[Area (A) where hook-shaped engaging element exists]
Using a warp, a weft, and a monofilament yarn for hook-shaped engaging elements, a plain weave was used as a woven structure, and a woven density (after heat-shrinking treatment) was adjusted to 55 warps/cm and 20 wefts/cm. Then, the hook-shaped engaging element monofilament yarn is driven in parallel to the warp yarn at a ratio of one to four warps, three wefts are floated and set and then the three warps are straddled, and a loop is formed at the straddled point. A loop was formed on the base fabric as described above. The width of this region is a narrow width composed of four warps and one monofilament for hook-shaped engaging elements.

[Area (B) where loop-shaped engaging element exists]
Using a warp, a weft, and a multifilament yarn for a loop-shaped engaging element, a plain weave was used as a woven structure, and was woven so that the woven density (after heat shrinkage treatment) was 55 warps/cm and 20 wefts/cm. .. The multifilament yarn for loop-shaped engaging element is driven parallel to the warp yarn at a ratio of one to four warp yarns, one weft yarn is floated and set and then one warp yarn is straddled, and the loop is formed at the straddled portion. A loop was formed on the backing so that it would form. The width of this region is a narrowness composed of four warps and one multifilament for a loop-shaped engaging element.
The hook-shaped engaging element monofilament thread and the loop-shaped engaging element multifilament thread do not intersect or contact with each other.

Then, the regions (A) and (B) were not woven separately, but were woven at the same time to manufacture a double-sided (front and back) engagement type cloth hook-and-loop fastener (see FIG. 4). Specifically, wefts were commonly woven into (A) and (B) to fabricate a double-sided fastener fabric such that regions (A) and (B) were alternately present.

In the woven fabric for double-sided engaging type surface fasteners woven in this manner, only the sheath component of the weft is heat-melted, and the warp, the monofilament yarn for hook-like engaging elements and the multifilament yarn for loop-like engaging elements, and Was heat-treated at 190° C., which is the temperature at which the core resin of the weft does not melt. As a result, the weft was contracted and the existing yarns were fused. The base cloth contracted 8% in the weft direction. After cooling the obtained fabric, one leg of the loop for hook-shaped engaging element was cut with a hair clipper to obtain a hook-shaped engaging element.
The obtained double-sided engagement type surface fastener had a hook-shaped engaging element density of 30 pieces/cm ² , a loop-shaped engaging element density of 60 pieces/cm ² , and a hook-shaped engaging element height of 1.7 mm. The height of the loop-shaped engaging element was 1.8 mm.

When the front surface and the back surface where the engaging elements of the obtained one-sided hook and one-sided loop fastener are present were touched by hand, they were extremely soft to the touch, and the base cloth itself was also extremely flexible. It was extremely easy to wrap around.
Furthermore, when the hook-shaped engaging element on the front surface and the loop-shaped engaging element on the back surface were engaged and peeled off 1000 times, the weft was not cut and the surface fastener was not torn at all. As a method for measuring tear resistance, the strength of tearing the ears in the longitudinal direction was 2.0 kg, which was extremely excellent.
In addition, when the double-sided engagement type surface fastener was washed and dried 10 times and the base fabric of the surface fastener was observed with a microscope, it was found that the weft yarns constituting the base fabric were divided into a plurality of yarns.

1: Base cloth 2: Hook-like engaging element 3: Loop-like engaging element 5: Spinneret 6: First roller 7: Second roller 8: Winding device 10: Lubricant applying device 11: Supply roller 12: Take-up roller 13: heating plate 14: first heating roller 15: second heating roller 16: UDY
17: FOY
18: SDY
19: DSY

Claims (3)

A hook-shaped engagement element and/or a loop-shaped engagement element made of the engagement element thread is present on the surface of a base fabric made of the warp thread, the weft thread, and the engagement element thread. In the method for manufacturing a surface fastener, wherein the element threads are both polyester threads, the weft threads include core-sheath type heat-fusible fibers, and the roots of the engaging elements are fused and fixed by the weft threads. , Fiber-forming polyester is melt-spun from a spinneret, and the spun yarn is once cooled to a temperature not higher than the glass transition point of the sheath component, 140°C to the sheath components without winding and without contact. A method for producing a surface fastener, which comprises using a multifilament yarn produced by a method of running in a non-contact type heating device having a temperature at which no sticking occurs, stretching heat treatment, and winding at a take-up speed of 3000 m/min or more. .. The engagement element is a loop-shaped engagement element made of a multifilament and a hook-shaped engagement element made of a monofilament, and both the loop-shaped engagement element and the hook-shaped engagement element are mixed on the surface of the base cloth. The method for manufacturing a surface fastener according to. The engaging element is a loop-shaped engaging element made of multifilament and a hook-shaped engaging element made of monofilament, the loop-shaped engaging element is present on the surface of the base cloth, and the hook-shaped engaging element is present on the back surface of the base cloth. The method for manufacturing a surface fastener according to claim 1, wherein

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