CN215209817U - Special suture for zipper, chain belt and zipper - Google Patents

Abstract

The utility model discloses a special suture of zip fastener, chain belt and zip fastener relates to the zip fastener field, and wherein the special suture of zip fastener includes sandwich layer fibre and cortical fiber, and the cortical fiber wraps up in the sandwich layer fibre outside to the fibrous rupture strength of cortex is less than the fibrous rupture strength of sandwich layer. The fracture strength of the skin layer fiber is low, the suture dyeing is convenient, the uniform coloring can be ensured, and the effect of protecting the core layer fiber can be achieved. And the core layer fiber has higher breaking strength and can play a strong role in supporting the whole suture. Therefore, the utility model provides a special suture of zip fastener can effectively overcome the defect that prior art exists, has advantages such as high temperature resistant, powerful big, the wearability is good, the load is drawn the number of times and is easily dyed, applicable in the high-speed production of sewing up, is favorable to improving production efficiency to the life of extension zip fastener.

Description

Special suture for zipper, chain belt and zipper

Technical Field

The utility model relates to a zip fastener field specifically indicates a special suture of zip fastener, chain belt and zip fastener.

Background

The nylon zipper is a common zipper, and consists of a nylon zipper belt and a pull head, wherein the plain zipper and the cloth belt are sewn and linked together through a suture to form the nylon zipper belt; the element chain consists of chain teeth and a central line, wherein the chain teeth are formed by extruding and heating monofilaments made of polyester materials in a screw, a central rod and other dies into spiral chain teeth, and the central line is positioned in the centers of the spiral chain teeth; the cloth belt is formed by weaving, knitting or non-weaving process for the yarn; the sewing thread is used for linking the plain chain and the cloth belt through a sewing machine, the sewing thread plays a linking role, the sewing thread is divided into an upper thread and a bottom thread which are respectively sewn through a straight needle and a curved needle, and the sewing thread is the most critical part, the weakest part and the most easily damaged part in the nylon chain belt.

It is known that the higher the breaking strength of the thread, the less dyeing is easy, which results in lighter coloring depth, and the color of the thread is not matched with the color of the braid and the color of the zipper teeth, thereby generating 'yin-yang color', so the breaking strength of the thread of the existing nylon chain belt is usually lower than 5.0cN/dtex, and is generally in the range of 3.0-4.0 cN/dtex. However, if the breaking strength of the seam is too low, the resistance and wear resistance of the seam will be reduced, which is not favorable for the production and use of the zipper, specifically in the following two aspects:

firstly, the common suture is single-strand or multi-strand suture made of polyester filament or polyester filament through primary twisting and secondary twisting, when in high-speed suture, a straight needle needs to be inserted into and penetrate through a central line and a cloth belt, the temperature of the straight needle is gradually increased after the straight needle is rubbed for a plurality of times, the temperature of the suture passing through a needle eye of the straight needle is also gradually increased, when the temperature of the suture is increased to be higher than the vitrification temperature (about 60 ℃), the suture enters a high elastic state, becomes soft, is broken, is reduced in strength and is easy to break, the common suture can only be used at the rotating speed of less than 3000 r/min, and when the speed of a sewing machine is increased to 5000 r/min, the suture can be broken frequently and cannot work normally. Therefore, the suture line has the problem that the suture line cannot resist high temperature and is not suitable for high-speed suture due to the fact that the breaking strength is too low.

Secondly, the upper thread penetrates through the cloth belt and the central line, is nested and knotted with the bottom thread, and then is drawn back, and the bottom thread covers the zipper teeth. When the zipper head is pulled to be closed, the bottom line on the upper part of the zipper teeth is most easily rubbed by the zipper head, when the friction is frequent, the filament fibers forming the suture line are gradually broken, when the fracture is more and more, the suture line is broken, the cloth belt is separated from the plain chain, the nylon chain belt is damaged, and the use function is lost. Therefore, the problem of poor wear resistance and low number of load pulls of the suture is caused by too low breaking strength.

Disclosure of Invention

The utility model provides a special suture of zip fastener, chain belt and zip fastener to solve the above-mentioned problem that exists among the prior art.

The novel use adopts the following technical scheme:

the special suture for the zipper comprises core layer fibers and skin layer fibers, wherein the skin layer fibers are wrapped outside the core layer fibers, and the breaking strength of the skin layer fibers is smaller than that of the core layer fibers.

Further, the core layer fiber and the skin layer fiber are made of the same material, or the core layer fiber and the skin layer fiber are made of different materials.

Further, the core layer fiber is a filament fiber, and the skin layer fiber is a staple fiber. .

Still further, the breaking strength of the long silk fiber is more than 5.0cN/dtex, and the breaking strength of the short silk fiber is less than 5.0 cN/dtex.

Still further, the breaking strength of the filament fiber is 7cN/dtex, and the breaking strength of the short fiber is 3.6 cN/dtex.

Furthermore, the filament fibers are polyester filament fibers, carbon fibers or polyamide fibers; the short silk fiber is polyester short silk fiber.

Further, the special suture for the zipper is of a single-strand structure or a multi-strand structure.

A chain belt comprises a suture for linking a plain chain and a cloth belt, the suture comprises a plurality of upper threads and bottom threads which are mutually wound and matched, and at least one of the upper threads and/or the bottom threads adopts the suture special for the zipper.

Further, the number of facial lines is 4, the number of bottom line is 2.

A slide fastener comprising a stringer as hereinbefore described.

From the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:

the utility model provides a special suture of zip fastener, including sandwich layer fibre and cortex fibre, the cortex fibre wraps up in the sandwich layer fibre outside to the fibrous rupture strength of cortex is less than the fibrous rupture strength of sandwich layer. The fracture strength of the skin layer fiber is low, the suture dyeing is convenient, the uniform coloring can be ensured, and the effect of protecting the core layer fiber can be achieved. And the core layer fiber has higher breaking strength and can play a strong role in supporting the whole suture. Therefore, the utility model provides a special suture of zip fastener can effectively overcome the defect that prior art exists, has advantages such as high temperature resistant, powerful big, the wearability is good, the load is drawn the number of times and is easily dyed, applicable in the high-speed production of sewing up, is favorable to improving production efficiency to the life of extension zip fastener.

Drawings

Fig. 1 is a schematic structural view of the special suture for the middle zipper of the present invention.

FIG. 2 is a schematic view of the chain belt of the present invention.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, the special suture for the zipper comprises a core layer fiber 1 and a skin layer fiber 2, wherein the skin layer fiber 2 is wrapped outside the core layer fiber 1, and the fracture strength of the skin layer fiber 2 is smaller than that of the core layer fiber 1. The skin layer fiber 2 has lower breaking strength, is convenient for suture dyeing, can ensure uniform coloring, and can play a role in protecting the core layer fiber 1. And the core layer fiber 1 has higher breaking strength and can play a strong role in supporting the whole suture. Specifically, when the suture is contacted with the suture needle, firstly the skin layer fiber 2 on the surface of the suture is rubbed, the core layer fiber 1 in the suture is not rubbed, so the temperature rise is slow, even if the speed of the sewing machine reaches 5000-. And in the nylon zipper use, when the pull head slides on the surface of the zipper teeth, the outer skin layer fiber 2 and the pull head rub with each other, and the inner core layer fiber 1 cannot be damaged, so that the wear resistance of the nylon zipper belt can be ensured, and the load pulling frequency of the zipper is obviously improved. In conclusion, the utility model provides a special suture of zip fastener can effectively overcome the defect that prior art exists, has advantages such as high temperature resistant, powerful big, the wearability is good, the load is drawn the number of times and is easily dyed, applicable in high-speed sewing production, is favorable to improving production efficiency to the life of extension zip fastener.

As shown in fig. 1, the core layer fiber 1 and the sheath layer fiber 2 may be made of the same material or different materials, and for example, both of them may be filament fibers or staple fibers. Preferably, the core layer fiber 1 in the embodiment is a filament fiber, the sheath layer fiber 2 is a staple fiber, and the breaking strength of the filament fiber is more than 5.0cN/dtex, and the breaking strength of the staple fiber is less than 5.0 cN/dtex. In one preferred embodiment, the breaking strength of the filament fibers is 7cN/dtex, and the breaking strength of the staple fibers is 3.6 cN/dtex.

As shown in fig. 1, in actual production, the filament fiber may be polyester filament made of polyester material, or other materials with the same performance, such as carbon fiber or polyamide fiber. The short fiber can be polyester short fiber or other short fiber easy to dye.

As shown in FIG. 1, the zipper-dedicated stitch has a single strand structure or a multi-strand structure. When a multi-strand structure is adopted, the structure can be manufactured by adopting the following process: the method comprises the steps of opening and picking, carding, drawing and roving treatment of short silk fibers, and then feeding spun yarns, doubling and twisting with long silk fibers to prepare stitches.

As shown in figures 1 and 2, a chain belt comprises a suture thread 3 for linking a plain chain 6 with a cloth belt 7, the suture thread 3 comprises a plurality of upper threads 4 and bottom threads 5 which are mutually wound and matched, and at least one upper thread 4 and/or bottom thread 5 adopts the special suture thread for the zipper. The zipper-dedicated thread may be used for one of the upper threads 4 or the lower threads 5, for some of the upper threads 4 and the lower threads 5, or for all of the upper threads 4 and the lower threads 5. In order to secure the entire strength of the fastener tape, the number of the top threads 4 is 4 and the number of the bottom threads 5 is 2 in this embodiment, and all the top threads and the bottom threads are the above-described zipper-dedicated sewing threads.

As shown in fig. 1 and 2, a slide fastener includes a fastener tape having the structure described above. When the zipper is used, the zipper head slides on the surface of the zipper teeth, and when the thread on the zipper teeth is in contact friction with the upper wing plate of the zipper head, only the skin layer fiber 2 on the surface of the thread is in friction with the zipper head, the core layer fiber 1 inside the zipper head cannot be damaged, so that the wear resistance and the load drawing frequency of the zipper can be improved.

The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.

Claims (10)

1. A special suture for a zipper is characterized in that: the fiber comprises a core layer fiber and a skin layer fiber, wherein the skin layer fiber is wrapped outside the core layer fiber, and the fracture strength of the skin layer fiber is smaller than that of the core layer fiber.

2. The special zipper sewing thread of claim 1, wherein: the core layer fiber and the skin layer fiber are made of the same material, or the core layer fiber and the skin layer fiber are made of different materials.

3. A zipper-specific stitch as claimed in claim 2, wherein: the core layer fiber is filament fiber, and the skin layer fiber is short silk fiber.

4. A zipper-specific stitch as claimed in claim 3, wherein: the breaking strength of the long silk fiber is more than 5.0cN/dtex, and the breaking strength of the short silk fiber is less than 5.0 cN/dtex.

5. A zipper-specific stitch as claimed in claim 4, wherein: the breaking strength of the long silk fiber is 7cN/dtex, and the breaking strength of the short silk fiber is 3.6 cN/dtex.

6. A zipper-specific stitch as claimed in claim 3, wherein: the filament fiber is polyester filament fiber, carbon fiber or polyamide fiber; the short silk fiber is polyester short silk fiber.

7. The special zipper sewing thread of claim 1, wherein: the special suture for the zipper is of a single-strand structure or a multi-strand structure.

8. The utility model provides a chain belt, includes the suture that is used for linking plain chain and strap, and this suture includes a plurality of intertwine complex upper thread and bottom line, its characterized in that: at least one of the upper thread and/or the lower thread employs a thread exclusive for slide fastener according to any one of claims 1 to 6.

9. The link belt of claim 7 wherein: the quantity of facial line is 4, the quantity of bottom line is 2.

10. A slide fastener, characterized in that: the link belt according to claim 7 or 8.

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