Heat-resistant polytetrafluoroethylene sewing thread and preparation method thereof

Abstract

The application discloses a heat-resistant polytetrafluoroethylene sewing thread and a preparation method thereof. The heat-resistant polytetrafluoroethylene sewing thread comprises a wear-resistant layer, a tensile layer and a thread core. The thread core is composed of first polytetrafluoroethylene fibers, second polytetrafluoroethylene fibers and shaped fibers. The thread core is provided with the shaped fibers, and the outer surface layer of the shaped fibers is interwoven with the first polytetrafluoroethylene fibers and the second polytetrafluoroethylene fibers. The outer surface layer of the thread core is provided with the wear-resistant layer, and the wear-resistant layer is provided between the tensile layer and the thread core. The outer surface layer of the first polytetrafluoroethylene fibers and the second polytetrafluoroethylene fibers is resistant to high temperature and has good heat insulation effect by using a ceramic fiber coating as a heat insulation coating. The prepared thread core has a flame-retardant effect. The wear-resistant layer is a polyurethane fiber material layer, which is resistant to wear and tear and is not easy to break. The surface of the thread body is easy to clean. The polytetrafluoroethylene sewing thread prepared by the heat-resistant polytetrafluoroethylene sewing thread and the preparation method thereof is non-toxic, harmless, environmentally friendly, not easy to corrode and durable.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of textile material production, and particularly relates to a heat-resistant polytetrafluoroethylene sewing thread and a preparation method. BACKGROUND

[0002] Sewing thread is a kind of thread required for knitted clothing products, which is twisted from two or more than two single yarns or monofilaments, and a small number of sewing threads are knitted, and the sewing thread is more firm, uniform, smooth, elastic, and often has special finishing to have the characteristics of passing through the needle eye and being suitable for sewing clothing and wear-resistant requirements, the sewing thread is a raw material with a large consumption in clothing auxiliary materials, and the physical and chemical properties and product quality of the sewing thread directly affect the production, wearing performance and appearance quality of the finished product, and the performance of the sewing thread is also directly related to the labor productivity of the sewing industry, and the sewing thread is an indispensable product in people's life, the sewing thread refers to a thread used for sewing and stitching textiles, leather products, plastics and bookbinding, the sewing thread has the characteristics of sewability and durability, and has the dual functions of practicality and decoration, as industrial sewing thread applied in industry, the advantages and disadvantages of the comprehensive performance of the industrial sewing thread are crucial to the sewing effect, with the rise of industrial textiles, the variety and quantity of industrial sewing thread are greatly improved, and the performance of the sewing thread is also required more harshly due to the special use of the industrial sewing thread, and the polytetrafluoroethylene sewing thread prepared by using polytetrafluoroethylene as a raw material is widely used in people's life.

[0003] The existing polytetrafluoroethylene sewing thread and the preparation method have the problems of low environmental protection, corrosion resistance and no anti-tension function. SUMMARY

[0004] The application aims to provide a heat-resistant polytetrafluoroethylene sewing thread and a preparation method, so as to solve the problems of the existing polytetrafluoroethylene sewing thread and the preparation method, such as no flame-retardant function, low environmental protection, corrosion resistance and no anti-tension function.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: a heat-resistant polytetrafluoroethylene sewing thread, comprising a wear-resistant layer, an anti-tension layer and a core, the core is composed of first polytetrafluoroethylene fibers, second polytetrafluoroethylene fibers and a shaping fiber, the core is provided with the shaping fiber, and the outer surface layer of the shaping fiber is interwoven with the first polytetrafluoroethylene fibers and the second polytetrafluoroethylene fibers, and the outer surface layer of the core is provided with the wear-resistant layer, and the wear-resistant layer and the core are provided with the anti-tension layer.

[0006] Further, the wear-resistant layer is knitted from polyurethane fibers, and the anti-tension layer is made of seaweed fiber.

[0007] Further, the setting fiber is a polypropylene fiber material; using the polypropylene fiber material as the setting guide wire can make the produced polytetrafluoroethylene sewing thread have high wrinkle resistance, is not easy to wrinkle, has high smoothness in use, and has remarkable effect.

[0008] Further, the outer surface layer of the first polytetrafluoroethylene fiber and the second polytetrafluoroethylene fiber is provided with a heat insulation coating, and the heat insulation coating is a ceramic fiber coating.

[0009] A heat-resistant polytetrafluoroethylene sewing thread, and the specific preparation method steps are as follows:

[0010] Step one: the polytetrafluoroethylene raw material is subjected to vacuum drying treatment, thereby obtaining pretreated polytetrafluoroethylene raw material, the polytetrafluoroethylene raw material is mixed and placed in a double-screw extruder for melt extrusion and granulation, thereby obtaining polytetrafluoroethylene particles, the polytetrafluoroethylene particles are subjected to drying treatment, thereby obtaining spinning raw material, and the spinning raw material is subjected to melt spinning, thereby obtaining the first polytetrafluoroethylene fiber and the second polytetrafluoroethylene fiber;

[0011] Step two: a heat insulation coating is sprayed on the outer surface layer of the first polytetrafluoroethylene fiber and the second polytetrafluoroethylene fiber, and drying is performed through a drying box to solidify the coating;

[0012] Step three: the first polytetrafluoroethylene fiber and the second polytetrafluoroethylene fiber are formed into a thread core through twisting along a setting fiber, and a tensile layer is interwoven on the outer surface layer of the thread core;

[0013] Step four: a wear-resistant layer is interwoven on the outer surface layer of the tensile layer, and the wear-resistant layer is a polyurethane fiber material layer;

[0014] Step five: the produced heat-resistant polytetrafluoroethylene sewing thread is subjected to wire drawing and deburring, and is trimmed through a rubber pressure wheel to improve the roundness of the cross section of the thread body.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1、The polypropylene fiber material is used as the setting guide wire in the present application, so that the produced polytetrafluoroethylene sewing thread has high wrinkle resistance, is not easy to wrinkle, has high smoothness in use, and has remarkable effect, the first polytetrafluoroethylene fiber and the second polytetrafluoroethylene fiber are interwoven on the outer surface layer of the setting fiber, the double-fiber structure increases the strength of the thread body, so that the thread body is more compact and is not easy to generate fluff, the tensile layer is made of seaweed fiber silk, has high tensile strength, is not easy to break, has good toughness, and effectively prolongs the service life of the thread body.

[0017] 2. By using a ceramic fiber coating as the heat-insulating coating, the outer layers of the first and second polytetrafluoroethylene fibers are made resistant to high temperatures and have good heat insulation effect, giving the made thread core a flame-retardant effect. The wear-resistant layer is made of polyurethane fiber material, which is wear-resistant, not easy to break, and the surface of the thread is easy to clean. The polytetrafluoroethylene sewing thread prepared by this heat-resistant polytetrafluoroethylene sewing thread and its preparation method is non-toxic, harmless, environmentally friendly, not easy to corrode, and durable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a heat-resistant polytetrafluoroethylene sewing thread and its preparation method according to the present invention.

[0019] Figure 2 This is a schematic diagram of the polyurethane fiber structure of a heat-resistant polytetrafluoroethylene sewing thread and its preparation method according to the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the first polytetrafluoroethylene fiber outer heat insulation coating of the heat-resistant polytetrafluoroethylene sewing thread and its preparation method of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the heat-insulating coating on the outer surface of the second polytetrafluoroethylene fiber in the present invention, which describes a heat-resistant polytetrafluoroethylene sewing thread and its preparation method.

[0022] In the diagram: 1. Wear-resistant layer; 2. Tensile layer; 3. Core wire; 4. First polytetrafluoroethylene fiber; 5. Shaping fiber; 6. Second polytetrafluoroethylene fiber; 7. Polyurethane fiber; 8. Heat insulation coating. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-4 As shown, a heat-resistant polytetrafluoroethylene sewing thread includes an abrasion-resistant layer 1, a tensile-resistant layer 2, and a core 3. The core 3 is composed of a first polytetrafluoroethylene fiber 4, a second polytetrafluoroethylene fiber 6, and a shaping fiber 5. The shaping fiber 5 is disposed inside the core 3, and the outer surface of the shaping fiber 5 is interwoven with the first polytetrafluoroethylene fiber 4 and the second polytetrafluoroethylene fiber 6. The abrasion-resistant layer 1 is disposed on the outer surface of the core 3, and the tensile-resistant layer 2 is disposed between the abrasion-resistant layer 1 and the core 3.

[0025] The wear-resistant layer 1 is woven from polyurethane fiber 7, and the tensile layer 2 is made of seaweed fiber filaments.

[0026] The setting fiber 5 is a polypropylene fiber material; using polypropylene fiber material as setting guide wire, the produced polytetrafluoroethylene sewing thread has high wrinkle resistance and is not easy to wrinkle, and has high smoothness in use, which is remarkable.

[0027] The outer surface layer of the first polytetrafluoroethylene fiber 4 and the second polytetrafluoroethylene fiber 6 is provided with a thermal insulation coating 8, and the thermal insulation coating 8 is a ceramic fiber coating.

[0028] A heat-resistant polytetrafluoroethylene sewing thread, the specific preparation method steps are as follows:

[0029] Step one: vacuum drying treatment is performed on the polytetrafluoroethylene raw material, and the pretreated polytetrafluoroethylene raw material is obtained. The polytetrafluoroethylene raw material is mixed and placed in a double screw extruder for melt extrusion and granulation, and polytetrafluoroethylene particles are obtained. The polytetrafluoroethylene particles are dried, and the spinning raw material is obtained. The spinning raw material is melt spun, and the first polytetrafluoroethylene fiber 4 and the second polytetrafluoroethylene fiber 6 are obtained.

[0030] Step two: a thermal insulation coating 8 is sprayed on the outer surface layer of the first polytetrafluoroethylene fiber 4 and the second polytetrafluoroethylene fiber 6, and dried through a drying box to solidify the coating.

[0031] Step three: the first polytetrafluoroethylene fiber 4 and the second polytetrafluoroethylene fiber 6 are twisted along the setting fiber 5 to form a core 3, and the outer surface layer of the core 3 is interwoven with a tensile layer 2.

[0032] Step four: the outer surface layer of the tensile layer 2 is interwoven with a wear-resistant layer 1, and the wear-resistant layer 1 is a polyurethane fiber 7 material layer.

[0033] Step five: the produced heat-resistant polytetrafluoroethylene sewing thread is finally drawn and deburred, and is trimmed by a rubber pressure wheel to improve the roundness of the cross section of the thread.

[0034] The application works: the polypropylene fiber material is used as the shaping guide wire in the application, which can make the produced polytetrafluoroethylene sewing thread have high wrinkle resistance and be not easy to wrinkle, and the thread has high smoothness and remarkable effect, the outer surface layer of the shaping fiber 5 is interwoven with the first polytetrafluoroethylene fiber 4 and the second polytetrafluoroethylene fiber 6, the double fibers increase the strength of the thread body, the thread body is more compact and not easy to fluff, the tensile layer 2 is made of seaweed fiber, which has high tensile strength, is not easy to break, has good toughness and effectively prolongs the service life of the thread body, the heat insulation coating 8 is a ceramic fiber coating, the outer surface layer of the first polytetrafluoroethylene fiber 4 and the second polytetrafluoroethylene fiber 6 has high temperature resistance and good heat insulation effect, the thread core 3 has the effect of flame retardation, the wear-resistant layer 1 is a layer of polyurethane fiber 7 material, which is not easy to break and the surface of the thread body is easy to clean, the heat-resistant polytetrafluoroethylene sewing thread and the prepared polytetrafluoroethylene sewing thread are non-toxic, harmless and environmentally friendly, are not easy to corrode and are durable.

[0035] Although embodiments of the application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the application, the scope of the application being defined by the appended claims and their equivalents.

Claims

1. A heat-resistant polytetrafluoroethylene sewing thread comprising an abrasion-resistant layer (1), a tensile-resistant layer (2) and a core (3), characterized in that, The core (3) is composed of first polytetrafluoroethylene fiber (4), second polytetrafluoroethylene fiber (6) and shaping fiber (5), the shaping fiber (5) is arranged in the core (3) and the outer surface layer of the shaping fiber (5) is interwoven with the first polytetrafluoroethylene fiber (4) and the second polytetrafluoroethylene fiber (6), the outer surface layer of the core (3) is provided with the wear-resistant layer (1) and the tensile layer (2) is arranged between the wear-resistant layer (1) and the core (3).

2. A heat resistant polytetrafluoroethylene sewing thread according to claim 1, characterized in that: The wear-resistant layer (1) is woven by polyurethane fiber (7), and the tensile layer (2) is made of seaweed fiber.

3. The heat resistant polytetrafluoroethylene sewing thread according to claim 1, characterized by: The shaping fiber (5) is a polypropylene fiber material.

4. The heat resistant polytetrafluoroethylene sewing thread according to claim 1, characterized by: The outer surface layer of the first polytetrafluoroethylene fiber (4) and the second polytetrafluoroethylene fiber (6) is provided with a heat insulation coating (8), and the heat insulation coating (8) is a ceramic fiber coating.

5. The heat-resistant polytetrafluoroethylene sewing thread according to any one of claims 1 to 4, characterized by, The specific preparation method steps are as follows: Step one: the polytetrafluoroethylene raw material is vacuum dried, the pretreated polytetrafluoroethylene raw material is obtained, the polytetrafluoroethylene raw material is mixed and placed in a double screw extruder for melt extrusion and granulation, polytetrafluoroethylene particles are obtained, the polytetrafluoroethylene particles are dried, and the spinning raw material is obtained, the spinning raw material is melt spun, and the first polytetrafluoroethylene fiber (4) and the second polytetrafluoroethylene fiber (6) are obtained; Step two: the heat insulation coating (8) is sprayed on the outer surface layer of the first polytetrafluoroethylene fiber (4) and the second polytetrafluoroethylene fiber (6), and dried by a drying box to solidify the coating; Step three: the first polytetrafluoroethylene fiber (4) and the second polytetrafluoroethylene fiber (6) are twisted along the shaping fiber (5) to form the core (3), and the outer surface layer of the core (3) is interwoven with the tensile layer (2); Step four: the wear-resistant layer (1) is interwoven on the outer surface layer of the tensile layer (2) and the wear-resistant layer (1) is a polyurethane fiber (7) material layer; Step five: finally, the produced heat-resistant polytetrafluoroethylene sewing thread is drawn and deburred, and is trimmed by a rubber pressure wheel to improve the roundness of the cross section of the thread.

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