JP6972450B2 - Hook-and-loop fastener with distinguishable front and back - Google Patents

Description

The present invention relates to a hook-and-loop fastener whose front surface and back surface can be distinguished from each other. Further, the present invention relates to a surface fastener in which the front surface and the back surface can be distinguished by changing the ratio of exposing the warp threads, the weft threads, and the fibers different from the engagement element threads on the front surface and the back surface of the surface fastener.

Conventionally, in a processing factory that handles a hook-and-loop fastener, there is a work of attaching a hook-and-loop fastener piece by an assembly line. Furthermore, there are many cases where foreigners are employed among the workers at the processing factory.

And, because we are hiring foreigners, work instructions are not transmitted well due to language problems, and there are increasing cases where the front and back of the hook-and-loop fastener are mistaken.

Therefore, as one of the required performances of processing factories that handle such surface fasteners, there is a demand for a surface fastener in which the front surface and the back surface can be distinguished so that the front surface and the back surface of the surface fastener are not mistaken.

By using polyethylene terephthalate fiber for the base fabric and polybutylene terephthalate fiber for the engaging element as a hook-and-loop fastener that can distinguish the front and back surfaces to meet such demands, both can be dyed in the same dyeing process. It is known that the difference in dyeability between the two can be used to make a difference in shade so that the front surface and the back surface can be distinguished (for example, Patent Document 1).

However, this known surface fastener that makes it possible to distinguish between the front and back surfaces is not sufficient in situations where it is necessary to instantly distinguish between the front and back surfaces in an assembly line, because the surface fastener only uses dyeability to create a difference in shade. Met. Further, the white hook-and-loop fastener has a problem that the front surface and the back surface cannot be distinguished because there is no difference in shade.

As another technique, a processing step of applying line printing to the back surface of the hook-and-loop fastener may be added to make the front surface and the back surface distinguishable. This has the problems that it costs more to increase the processing process for line printing, the selection of pigments that increase the density so that they do not seep out to the surface of the hook-and-loop fastener, and the costs associated with it. There is.

Japanese Unexamined Patent Publication No. 2014-27988

The present invention has a surface that solves the problem of making it possible to distinguish between the front surface and the back surface by making a difference in shade by utilizing the difference in dyeability between the base fabric portion and the engaging element portion as described above. Supplying a hook-and-loop fastener that makes the back side identifiable, that is, the front side and the back side can be instantly distinguished even in the flow work of the processing factory, and the front side and the back side can be distinguished even in the white face fastener, and the hook-and-loop fastener is involved. It is an object of the present invention to provide a hook-and-loop fastener whose front surface and back surface can be distinguished with almost no decrease in resultant force.

That is, in the present invention, in a hook-and-loop fastener made of a base cloth composed of warp threads and weft threads and a thread for an engaging element, fibers different in color from the warp threads, weft threads and threads for engaging elements are placed parallel to the warp threads and from the surface. It is a hook-and-loop fastener that can distinguish between the front and back surfaces, which is characterized by being woven into the base fabric with a structure that looks long on the back surface.

It is preferable that the fibers different in color from the warp, the weft and the thread for the engaging element are fibers that do not dye in the same color under the same dyeing conditions as the warp, the weft and the engaging element.

It is preferable that the warp threads, the weft threads, the threads for the engaging element, and the fibers different from each other are woven into the base cloth at a ratio of one to ten to 200 warp threads constituting the base cloth.

It is preferable that fibers different from the warp threads, the weft threads and the engagement element threads are woven on the front surface in a structure that is exposed by one weft thread and on the back surface by two to five weft threads.

Further, it is preferable that the engaging element is a loop-shaped engaging element made of a multifilament yarn or a hook-shaped engaging element made of a monofilament yarn.
Then, it has a loop-shaped engaging element on either the front surface or the back surface of the base cloth and a hook-shaped engaging element on the other surface, or a loop-shaped engaging element on the surface of the base cloth. It is preferable to have both a hook-shaped engaging element and a hook-shaped engaging element.

The hook-and-loop fastener in which the front surface and the back surface of the present invention can be distinguished has a color difference from the surrounding fibers due to the insertion of fibers different in color from the warp threads, weft threads, and engagement element threads, and the warp threads, weft threads, and engagement threads. By changing the ratio at which the thread for the element and the fiber different in color are exposed on the front surface and the back surface of the hook-and-loop fastener, for example, it is difficult to see on the front surface and easy to see on the back surface. By making use of the difference in dyeability between the two elements to make it possible to distinguish between the front surface and the back surface, the front surface and the back surface can be instantly distinguished even in the flow work of the processing factory.

The fibers that are different in color from the warp, weft and engagement element yarn are fibers that do not dye the same color under the same dyeing conditions as the warp, weft and engagement element yarn, so that the front and back surfaces of the white hook-and-loop fastener can be changed. It can be identified, and the engaging force of the hook-and-loop fastener is hardly reduced.

Further, in the hook-and-loop fastener in which the front surface and the back surface of the present invention can be distinguished, the warp threads, the weft threads, the threads for the engaging element, and the fibers of different colors are simultaneously used as the base cloth at a ratio of one to 10 to 200 warp threads constituting the base cloth. By weaving, it is not necessary to increase the processing process as in the case of adding a processing process of line printing on the back surface of the hook-and-loop fastener in the other technology and making the front surface and the back surface distinguishable, which is also advantageous in terms of cost. Can be issued.

It is a figure which showed schematically the front surface of the example of the loop surface fastener which can distinguish the front surface and the back surface of this invention. It is a figure which showed typically the back surface of the example of the loop surface fastener which can distinguish the front surface and the back surface of this invention.

A hook-and-loop fastener in which the front surface and the back surface of the present invention can be distinguished will be described with reference to the drawings. First, the hook-and-loop fastener in which the front surface and the back surface of the present invention can be distinguished is a fiber different from the warp, the weft, the thread for the engaging element and the warp, the weft and the thread for the engaging element, and preferably the warp, the weft and the engagement. It is composed of fibers that do not dye in the same color under the same dyeing conditions as the yarn for a compound element.

FIG. 1 is a schematic view of the base fabric of such a hook-and-loop fastener 1 when viewed from the surface. In the figure, 2 with a vertical line is a warp, 3 with a horizontal line is a weft, a loop shape and a diagonal line. 4 is the thread for the engagement element, and 5 is the fiber that is different in color from the warp, weft and the thread for the engagement element, preferably the same color as the warp, weft and the engagement element under the same dyeing conditions. Represents undyed fibers. Fibers 5 that are different in color from the warp 2, the engagement element 4, the warp, the weft, and the engagement element, and preferably do not dye the same color under the same dyeing conditions as the warp, the weft, and the engagement element. Each break indicates that it is subducting under the weft.

FIG. 2 is a schematic view of the base fabric of such a hook-and-loop fastener 1 when viewed from the back surface. In the figure, 2 with a vertical line is a warp, 3 with a horizontal line is a weft, and a diagonal line is drawn. 4 is a thread for an engaging element, and 5 is a fiber different from the warp, the weft, the thread for the engaging element and the warp, the weft and the thread for the engaging element, and preferably the warp, the weft and the engaging element. Represents fibers that do not dye the same color under the same dyeing conditions. Fibers 5 that are different in color from the warp 2, the engagement element 4, the warp, the weft, and the engagement element, and preferably do not dye the same color under the same dyeing conditions as the warp, the weft, and the engagement element. Each break indicates that it is subducting under the weft.

As is clear from these figures, the fibers 5 which are different in color from the warp, weft and the thread for the engaging element on the surface, preferably do not dye the same color under the same dyeing conditions as the warp, the weft and the engaging element. It can be seen that only a small amount is exposed, and a large amount is exposed on the back surface.

In the hook-and-loop fastener of the present invention, the engagement element thread 4, the warp, the weft, and the fiber 5 different from the engagement element thread are woven into the base fabric in parallel with the warp thread 2. The thread 4 for the engaging element protrudes from the surface of the base cloth in a loop shape in some places on the surface side of the base cloth, and in the case of the hook-shaped engaging element, one leg side of the loop is cut to form a hook shape. In the case of a loop-shaped engaging element, it is used as a hook-and-loop fastener while maintaining a loop shape without being cut.

The hook-shaped engaging element is formed from a monofilament thread for a hook-shaped engaging element, and the loop-shaped engaging element to be an engaging partner of the hook-shaped engaging element is formed from a multifilament thread.

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

It is preferable that the weft contains heat-sealing fibers. A typical example of the heat-sealing fiber is a core-sheath type heat-sealing fiber having a sheath component as a heat-sealing component. Since the weft contains heat-sealing fibers, the engagement element yarn can be firmly fixed to the base fabric, and the engagement element yarn is pulled out from the base fabric like a conventional hook-and-loop fastener. In order to prevent this, it is not necessary to apply a polyurethane-based or acrylic-based backcoat resin liquid (adhesive liquid) to the back surface of the hook-and-loop fastener base cloth. Therefore, the distinction by the different color fibers existing on the back surface of the present invention becomes more remarkable.

The sheath component resin of the core-sheath type heat-sealing fiber serving as the weft is a monofilament for a hook-shaped engaging element, a multifilament for a loop-shaped engaging element, the different color fiber, and the core-sheath type heat fusion. It is necessary to have a melting point or softening point lower than any of the core component resins of the adhesive fiber, and a resin having a melting point or softening point lower than 20 ° C. is preferable, and a melting point or softening point is 30 ° C. It is more preferable that the resin is lower than that. Specifically, the sheath component resin is a resin having a melting point or a softening point of 150 to 200 ° C. Examples of the sheath component resin include polyethylene terephthalate in which isophthalic acid, sodium sulfoisophthalate, ethylene glycol, propylene glycol and the like are copolymerized, or polybutylene terephthalate-based polyester resin in which the copolymer is copolymerized.

The core component is a polyalkylene terephthalate ester resin because it has peeling resistance with the sheath component resin, has the same dyeability, and is easily shrunk to tighten and fix the thread for the engaging element. Is preferable. Polyethylene terephthalate homopolymers and polybutylene terephthalate homopolymers are preferable because they are required to have a high melting point as a core component, and polyethylene terephthalate homopolymers are particularly preferable in terms of form stability.

As for the ratio of the heat-sealing fibers to the fibers constituting the weft, the hook-shaped engaging element and the hook-shaped engaging element and particularly when all the wefts are substantially formed of the core-sheath type heat-sealing fibers. It is preferable because both the loop-shaped engaging elements are firmly fixed to the base cloth. When the fiber is not a composite fiber such as a core sheath but a single fiber in which all of the fibers are formed of a heat-sealing polymer, the heat-sealing polymer melted and solidified again becomes brittle and easily cracked, and is sewn. In such a case, the base cloth is likely to tear from the sewing thread portion. Therefore, the heat-fusing fiber needs to contain a resin that is not heat-fused, and a fiber having a cross-sectional shape of a core sheath is used.
The weight ratio of the core component to the sheath component is preferably in the range of 60:40 to 80:20. The cross-sectional shape of the core sheath does not have to be a completely concentric core sheath shape, and may be an eccentric core sheath shape close to a bimetal shape.

In order to firmly fix both the hook-shaped engaging element and the loop-shaped engaging element to the base fabric, the heat-sealing fibers used as wefts are heat-sealed, and the fibers themselves contract to engage in hook-like engagement. It is preferable to tighten the roots of the coupling element and the loop-shaped engaging element from both sides. Therefore, the heat-fusing fiber used as the ground weft is preferably a fiber that causes a large heat shrinkage under heat treatment conditions. Specifically, fibers having a dry heat shrinkage rate of 10% or more at 200 ° C. are preferable, and fibers having a dry heat shrinkage rate of 11 to 18% at 200 ° C. are more preferable.
The weft is preferably a multifilament yarn, and the thickness of the multifilament yarn constituting the weft is preferably a multifilament yarn having a total decitex of 75 to 300 decitex consisting of 24 to 72 filaments, particularly 24 to 48 yarns. A multifilament yarn having a total decitex of 75 to 200 decitex composed of filaments 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 this purpose, a thick monofilament yarn made of synthetic fiber is used.

The thickness of the monofilament thread for the hook-shaped engaging element is preferably 0.13 to 0.40 mm in diameter, and more preferably 0.14 to 0.35 mm in diameter.

As the thickness of the thread for the loop-shaped engaging element, a multifilament yarn having a total decitex of 5 to 15 filaments of 150 to 300 decitex is preferable, and a total decitex consisting of 7 to 12 filaments is more preferable. Multifilament yarns with 160-280 decitex are preferred.

It is a fiber different from the warp, weft, hook-shaped engaging element monofilament yarn or loop-shaped engaging element multifilament yarn, warp, weft, and engaging element yarn described above, and is preferably warp, weft and engagement. A woven fabric for a hook-and-loop fastener is composed of a fiber thread that does not dye in the same color under the same dyeing conditions as the thread for a compound element.

As the weaving structure of the woven fabric, a monofilament yarn for a hook-shaped engaging element or a multifilament yarn for a loop-shaped engaging element, and a plain weave are preferable for the warp, and fibers different from the warp, the weft, and the yarn for the engaging element are on the surface. It is preferable to have a woven structure in which one weft is straddled and the back surface is exposed by straddling two to five wefts. In the case of hook-and-loop fastener, the woven structure is such that 1 to 3 warp threads are jumped over and slipped between the warp threads while forming a loop. In the case of a hook-and-loop mixed hook-and-loop fastener, the woven structure existing in parallel with the hook-and-loop engagement element efficiently cuts one leg side of the loop for the hook-shaped engaging element. Further, it is preferable that the hook-shaped engaging element and the loop-shaped engaging element are easily engaged.

The weaving density of the warp threads is preferably 45 to 90 threads / cm after the heat treatment, and the weaving density of the weft threads is preferably 15 to 30 threads / cm after the heat treatment.

The weight ratio of the weft is the thread for the hook-shaped engaging element or the thread for the loop-shaped engaging element, the warp and the weft, and the warp, the weft, the thread for the engaging element and the thread of a different color fiber. It is preferably 15 to 40% based on the total weight of the above.

The number of driven monofilament yarns for hook-shaped engaging elements and multifilament yarns for loop-shaped engaging elements is 20 warp yarns (including monofilament yarns for hook-shaped engaging elements or multifilament yarns for loop-shaped engaging elements), respectively. On the other hand, about 3 to 8 is preferable.

In the case of a hook / loop mixed surface fastener, a total of 20 warp yarns (monofilament yarn for hook-shaped engaging element or loop-shaped engaging element multi) are used for the monofilament yarn for hook-shaped engaging element and the multifilament yarn for loop-shaped engaging element. 3 to 8 yarns are preferable with respect to (including filament yarns), and the number ratio of the monofilament yarns for hook-shaped engaging elements and the multifilament yarns for loop-shaped engaging elements is preferably in the range of 33:67 to 67:33.

Then, the warp, the weft, the thread for the engaging element, and the thread of the fiber having a different color are woven in parallel with the warp. By weaving in parallel with the warp and making the weave structure that is exposed by straddling one weft on the front surface and straddling two to five weft threads on the back surface, the exposure ratio on the front and back surfaces changes and the front and back surfaces are exposed. Can be identified. On the contrary, it is conceivable to have a woven structure in which two to five weft yarns are straddled on the front surface and one weft yarn is straddled on the back surface to be exposed. The thread of the fiber different from the thread is covered with the thread for the engaging element on the front surface of the base cloth, and is less exposed on the back surface, which is not preferable for distinguishing the front surface and the back surface. It is conceivable to weave the base fabric parallel to the weft as a part of the weft, but in this method, since the front surface and the back surface of the base cloth are mainly covered with the warp and the thread for the engaging element, the warp and the weft , The thread for the engaging element and the thread of the fiber having a different color are less exposed on the front surface and the back surface, which is not preferable for distinguishing the front surface and the back surface.

As for the number of weaving threads of warp threads, weft threads, threads for engaging elements, and threads of different colors, it is sufficient that at least one thread is continuously woven in the surface fastener in the length direction of the surface fastener. be. As a specific number of weaving threads, it is preferable that the warp threads, the weft threads, the threads for the engaging element, and the threads of different colors are woven at a ratio of about 1 in 10 to 200 warp threads constituting the base fabric. If more advanced front and back discrimination is required, it can be easily achieved by increasing the number of weaves or increasing the proportion of exposure on the back.
For example, the number of weaving threads is preferably 1 to 4 of the different colored fibers with respect to 120 warp threads. It is preferable to use one or more fasteners to ensure sufficient identification, and to use four or less fasteners in terms of ensuring the aesthetics and physical properties of the hook-and-loop fastener. Alternatively, it is preferable to set the ratio of exposing the different color fibers to the back surface to 1: 3 in terms of distinctiveness and physical properties.

In the process of manufacturing the hook-and-loop fastener of the present invention, heat is applied to the hook-and-loop fastener base cloth in order to fix the hook shape of the hook-shaped engaging element and the loop shape of the loop-shaped engaging element. In the hook-and-loop fastener of the present invention, the heat applied to fix the hook shape and the loop shape simultaneously causes the heat-sealing fibers constituting the base fabric to contract and fuse, and the hook-shaped engaging element and the loop-shaped engaging element are engaged. The base of the element will be firmly fixed to the base cloth. Therefore, the temperature of the applied heat is the temperature at which the heat-sealing fibers used as the weft shrink and melt, and the monofilament yarn for the hook-shaped engaging element, the multifilament yarn for the loop-shaped engaging element, the warp, and the above. A temperature of 150 to 250 ° C., which is the temperature at which the different color fibers are heat-fixed, is generally used, more preferably in the range of 185 to 220 ° C., still more preferably in the range of 190 to 210 ° C.

Next, one leg side of the loop leg for the hook-shaped engaging element protruding from the surface of the hook-and-loop fastener woven fabric thus heat-treated is cut to obtain a hook-shaped engaging element. As a cutting device used for cutting one side of the loop for the hook-shaped engaging element, one leg of the loop for the hook-shaped engaging element of the hook-and-loop fastener cloth running in the direction of the ground warp is attached to two fixed blades. A cutting device having a structure in which the space is cut by the reciprocating motion of the movable cutting blade 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 because only one leg of the loop can be easily amputated.

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. In this respect, it is preferable in terms of the fact that the engaging element does not easily fall over.

The density of hook-shaped engaging elements in hook-and-loop fasteners, the density of loop-shaped engaging elements in loop-faced fasteners, and the total density of hook-shaped engaging elements and loop-shaped engaging elements in hook-loop mixed surface fasteners are engaged. ^{30 to 80 pieces / cm 2} , 30 to 80 pieces / cm ² , and 30 to 80 pieces / cm ² , respectively, are preferable based on the base cloth portion in which the element is present and the size standard after heat treatment. The ratio of hooks to loops of the hook-loop mixed surface fastener is preferably in the range of 40:60 to 60:40.

The surface fastener obtained in this way is heat-treated so that the front surface and the back surface can be distinguished. The hook-and-loop fasteners constituting the present invention are the same because, for example, the base fabric composed of warp threads and weft threads and the thread for the engaging element are made of polyethylene terephthalate or polybutylene terephthalate fiber and are made of the same material made of polyester resin. Can be dyed in similar colors under certain conditions. Fibers that are different in color from the warp, weft, and engagement element yarn, and are not dyed in the same color under the same dyeing conditions as the warp, weft, and engagement element, are further exposed on the front and back surfaces. By changing it, the front surface is less exposed and the back surface is more exposed, making it possible to distinguish between the front surface and the back surface.

For example, if the base fabric composed of the warp and the weft and the thread for the engaging element have the same color, the fiber may be different from the color, and the warp and the weft are preferable. The base fabric and the engagement element yarn are preferably fibers that are not dyed in the same color, and the base fabric and the engagement element yarn composed of warp and weft are yarns of the same material made of polyester resin. The polyester-based resin is not particularly limited as long as it is a resin that does not dye in the same color, but polyphenylene sulfide-based resin, nylon-based resin, and the like are preferably mentioned because they are excellent in distinguishability.
Further, the fineness of fibers different from those of warp threads, weft threads, and engagement element threads is preferably 75 to 300 decitex in terms of physical properties and weaving properties, and the number of filaments is preferably 5 to 96 in terms of physical properties and weaving properties. NS.

In the front and back surface identification surface fasteners of the present invention, even if it is a hook surface fastener or a loop surface fastener having a hook-shaped engaging element or a loop-shaped engaging element on the surface of the base cloth, or with the surface of the base cloth. Even a double-sided hook-and-loop fastener having a loop-shaped engaging element on one of the back surfaces and a hook-shaped engaging element on the other surface, or a loop-shaped engaging element on the surface of the base cloth. It may be a hook-loop mixed type hook-and-loop fastener having both a hook-shaped engaging element and a hook-shaped engaging element.

Further, in the case of a double-sided hook-and-loop fastener having a loop-shaped engaging element on either the front surface or the back surface of the base fabric and a hook-shaped engaging element on the other surface, the warp, weft, and engaging element. The long exposed surface of the thread of the fiber different from the thread may be a surface having a loop-shaped engaging element or a surface having a hook-shaped engaging element.

Further, the hook surface fastener may be connected to the end portion in the length direction of the loop surface fastener, or the hook surface fastener may be attached to the back surface of the end portion in the length direction of the loop surface fastener. Further, the hook-loop mixed type surface fasteners may be bonded to each other with the engaging element surface facing outward.

The hook-and-loop fastener capable of distinguishing the front surface and the back surface of the present invention can be used in a field of application in which a conventional general surface fastener is used, but is particularly suitable for a scene in which the front surface and the back surface are distinguished for work. ing.

For example, hook-and-loop fastener pieces are often attached during assembly line work at a processing factory, but in recent years, due to language problems, work instructions are not transmitted well and the front and back sides are often mistaken. Since it has been used, it is suitably used in such processing factories.

Hereinafter, the present invention will be described in detail with reference to Examples.
Example 1
The following threads were prepared as warp threads and weft threads constituting the base fabric of the hook-and-loop fastener, multifilament threads for loop-shaped engaging elements, and additional insertion threads for distinguishing the front surface and the back surface.
[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-based heat-sealed yarn made of core-sheath type composite fiber)
-Core component: Polyethylene terephthalate (melting point 260 ° C)
-Sheath component: 25 mol% isophthalic acid copolymerized polyethylene terephthalate
(Softening point: 190 ° C)
・ Core-sheath ratio (weight ratio): 70:30
・ Total decitex and number of filaments: 24 at 116 dtex ・ Dry heat shrinkage at 200 ° C: 13%

[Multifilament for loop-shaped engaging element]
-Polybutylene terephthalate fiber (melting point: 220 ° C)
・ Total decitex and number of filaments: 7 at 265 dtex
[Additional insertion thread]
・ Multifilament yarn made of beige-colored polyphenylene sulfide peculiar to raw yarn ・ Total decitex and number of filaments: 60 at 250 dtex

Using plain weave as the weaving structure using the warp, weft, multifilament for loop-shaped engaging element, warp, weft, and thread of different colors from the thread for engaging element, the multifilament made of polyphenylene sulfide is per inch. It is parallel to the warp yarns at a ratio of 2 yarns, and is woven with an exposed structure straddling 1 weft yarn on the front surface and 3 weft yarns on the back surface, and the weaving density (after heat shrinkage treatment) is 55 warp yarns / Weaved so as to be cm and 22 weft threads / cm. Then, a multifilament for a loop-shaped engaging element is driven in parallel to the warp without straddling the warp at a ratio of 1 in 4 warp, and after the 5 wefts float and sink, a loop is formed on the base cloth so as to form a loop. Formed.

Only the sheath component of the weft is heat-melted in the loop surface fastener tape configured under the above conditions, and the warp, the multifilament for the loop engaging element, the multifilament made of polyphenylene sulfide, and the core component of the weft The heat treatment was performed at 200 ° C., which is a temperature at which heat melting does not occur. Then, the obtained woven fabric was cooled. The density of the loop-shaped engaging element of the obtained loop-shaped engaging element was 44 pieces / cm ² , and the height of the loop-shaped engaging element from the base cloth surface was 2.4 mm.

When the loop surface fastener thus obtained was dyed white and black with high pressure conditions and a disperse dye capable of dyeing polyethylene terephthalate fiber and polybutylene terephthalate fiber, the surface fastener tape was dyed white and black. The additional insert thread made of polyphenylene sulfide, which is a beige color peculiar to the raw thread, was not dyed and had a color difference from the surrounding threads.

Since the exposure ratio of the multifilament made of polyphenylene sulfide differs between the front surface and the back surface, the multifilament made of polyphenylene sulfide is difficult to see on the front surface and easily visible on the back surface, so that the front surface and the back surface can be distinguished. In addition, it had an engaging force equivalent to that of a hook-and-loop fastener in which a multifilament made of polyphenylene sulfide was not woven.

Example 2
In the first embodiment, the multifilament made of polyphenylene sulfide, which is a warp yarn, a weft yarn, a yarn for an engaging element, and a yarn of a different color, is changed to a black original yarn made of a polyethylene terephthalate resin and woven under the same conditions as in the first embodiment. , Dyed white with a disperse dye. The tape for the hook-and-loop fastener was dyed white, but the additional insertion thread made of black original thread was not dyed and had a color difference from the surrounding threads. Even with a multifilament made of polyphenylene sulfide, the color difference is such that the front and back surfaces can be distinguished, but the black original yarn has a color difference that makes it easier to distinguish between the front and back surfaces. In addition, it had the same engaging force as the hook-and-loop fastener in which the black original yarn was not woven.

Example 3
In the first embodiment, the warp, the weft, and the yarn for the loop-shaped engaging element, which are made of nylon 6 and have the same thickness, are used, and the warp, the weft, and the yarn for the engaging element are different from each other. The yarn was changed to a multifilament yarn made of polyethylene terephthalate, woven under the same conditions as in Example 1 above, and dyed black with an acid dye. The tape for the hook-and-loop fastener was dyed black, but the additional insertion thread made of polyethylene terephthalate was not dyed and had a color difference from the surrounding threads. Since the additional insertion thread made of polyethylene terephthalate is difficult to see on the front surface and easy to see on the back surface, the color difference between the front surface and the back surface is easy to confirm. In addition, it had an engaging force equivalent to that of a hook-and-loop fastener in which a multifilament yarn made of polyethylene terephthalate was not woven.

Comparative Example 1
The warp, weft and engagement element yarn are the same as in Example 1, and the multifilament made of polyphenylene sulfide of Example 1 is changed to polyamide fiber nylon 6 and woven under the same conditions as in Example 1 to disperse the dye. It was dyed white and black with. Polyamide-based fiber nylon 6, which is an additional insertion thread, has a similar color because it can be dyed with a disperse dye, and the loop surface fasteners obtained in both white and black are warp threads, weft threads, engagement element threads, and additional insertion threads. Does not produce a color difference that can be instantly identified, and is not preferable for distinguishing between the front surface and the back surface.

1: Surface fastener with distinguishable front and back surfaces 2: Warp thread 3: Weft thread 4: Thread for engaging element 5: Warp, weft and fiber different from the thread for engaging element

Claims (5)

The weft is composed of a warp, a base fabric composed of wefts, and a thread for an engaging element, and the weft contains a heat-sealing fiber. In the hook-and-loop fastener, which is fixed to the base cloth and the back surface of the base cloth is not coated with the backcoat resin liquid, the warp threads, the weft threads, the threads for the engaging element, and the threads of fibers different from each other form the base cloth. It is a structure that appears to be parallel to the warp and longer on the back surface than the front surface at a rate of one to the book, and is characterized in that the surface is woven into the base fabric of the portion covered with the thread for the engaging element. , Hook-and-loop fastener with distinguishable front and back. The surface fiber according to claim 1, wherein the fibers different from the warp, the weft and the thread for the engaging element are fibers that are not dyed in the same color under the same dyeing conditions as the warp, the weft and the engaging element.
Suner. 1. A hook-and-loop fastener whose front surface and back surface can be identified as described in 2. The hook-and-loop fastener according to claims 1 to 3, wherein the engaging element is a loop-shaped engaging element made of a multifilament thread or a hook-shaped engaging element made of a monofilament thread, and the front surface and the back surface can be distinguished. It has a loop engaging element on one of the front and back surfaces of the base cloth and a hook-shaped engaging element on the other surface, or a loop-shaped engaging element and a hook-shaped on the surface of the base cloth. The surface fastener according to any one of claims 1 to 4, wherein the surface fastener has both engaging elements and the front surface and the back surface can be distinguished.

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