High-temperature-resistant staple fiber composite polyester sewing thread

Abstract

The utility model discloses a high-temperature-resistant staple fiber composite polyester sewing thread, and relates to the technical field of sewing threads, the high-temperature-resistant staple fiber composite polyester sewing thread comprises a tensile core wire and a plurality of protective wire harnesses wound on the outer surface of the tensile core wire, the protective wire harnesses comprise polyester staple fibers, a reinforcing layer is wound on the outer surface of the polyester staple fibers, and a high-temperature-resistant layer is wound on the outer surface of the reinforcing layer; the high-temperature-resistant layer comprises a plurality of meta-aramid fibers and polyimide fibers, the meta-aramid fibers and the polyimide fibers are alternately wound on the outer surface of the reinforcing layer at intervals, and the outer surfaces of the meta-aramid fibers and the polyimide fibers are coated with a silicone flame-retardant glue solution; through cooperation of the structure, the high-temperature-resistant effect of the sewing thread is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sewing thread technical field, concretely is a kind of high-temperature-resistant short fiber composite polyester sewing thread. BACKGROUND

[0002] Sewing thread is the thread required for knitted clothing products, and sewing thread can be divided into three categories according to raw materials: natural fiber, synthetic fiber sewing thread and mixed sewing thread. Pure polyester fiber is often used as the raw material of sewing thread.

[0003] The utility model discloses a kind of high-temperature-resistant short fiber composite polyester sewing thread with the utility model discloses a number CN215251482U, including polyester filament and the short fiber of polyester coated on the surface of polyester filament, fastening area is arranged between polyester filament and short fiber of polyester, the surface of short fiber of polyester is coated with bundle layer, the surface of bundle layer is coated with isolation layer, one end of isolation layer is provided with heat insulation layer, the surface of heat insulation layer is provided with protective layer.

[0004] In the process of implementing the present application, it is found that the above-mentioned sewing thread has the following problems: in the above-mentioned document, the heat insulation layer is arranged outside the protective layer, and the protective layer is made of silk. However, the silk-made protective layer does not have flame-retardant and heat-insulating functions, and the heat insulation layer arranged inside is made of polyester fiber. Although polyester fiber has certain heat resistance, it is combustible and can easily burn under high-temperature and high-oxygen conditions. Therefore, it does not have flame-retardant properties, and the single polyester has poor melting resistance under high-temperature environment. Once it comes into contact with high-temperature objects such as cigarette butts and sparks, it may crack, become brittle, or even melt, resulting in poor high-temperature resistance.

[0005] Therefore, a high-temperature-resistant short fiber composite polyester sewing thread is proposed. UTILITY MODEL CONTENTS

[0006] The utility model aims to improve the high-temperature resistance of sewing thread, and provides a high-temperature-resistant short fiber composite polyester sewing thread.

[0007] The utility model adopts the following technical solutions:

[0008] A high-temperature-resistant short fiber composite polyester sewing thread includes a tensile core wire and a plurality of protective thread bundles wound around the outer surface of the tensile core wire. The protective thread bundle includes short polyester fibers. The outer surface of the short polyester fibers is wound with a reinforcing layer, and the outer surface of the reinforcing layer is wound with a high-temperature-resistant layer.

[0009] The high-temperature-resistant layer includes a plurality of meta-aramid fibers and polyimide fibers. The meta-aramid fibers and the polyimide fibers are alternately and spacedly wound around the outer surface of the reinforcing layer, and the outer surfaces of the meta-aramid fibers and the polyimide fibers are coated with silicone flame-retardant glue.

[0010] Further, the reinforcing layer comprises a plurality of polyester fibers and nylon fibers, the polyester fibers and the nylon fibers are alternately and spacedly arranged on the outer surface of the polyester staple fibers.

[0011] Further, the polyester fibers and the nylon fibers are twisted on the outside of the polyester staple fibers in an "S" twist direction.

[0012] Further, the meta-aramid fibers and the polyimide fibers are twisted on the outside of the reinforcing layer in an "S" twist direction.

[0013] Further, the protective wire harness is twisted on the outside of the tensile core wire in an "S" twist direction.

[0014] Therefore, the sewing thread has the advantages that:

[0015] In the utility model, when the sewing thread is used, the amide group in the chemical structure of the meta-aramid fiber in the outermost high-temperature-resistant layer is in the meta-position in the benzene ring, so that the benzene ring does not have the conjugate effect, the macromolecular chain has the soft structure, and the chemical structure is particularly stable; the structure makes the meta-aramid fiber not burn in the air and self-extinguish when meeting the fire, belongs to the refractory fiber, has the excellent flame-retardant and high-temperature-resistant characteristics, and can improve the high-temperature-resistant effect of the whole sewing thread; meanwhile, the molecule of the polyimide fiber contains the very stable aromatic heterocyclic structure; the structure makes the fiber keep the stability and integrity under the high temperature and not easy to decompose or burn, so that the polyimide fiber has the excellent high-temperature-resistant performance; the polyimide fiber has the good carbonization capacity when burning; the large number of heat-resistant benzene rings and aramide groups in the fiber form the carbonization layer when burning; the carbonization layer can isolate the oxygen and prevent the further burning of the fiber, and has the certain flame-retardant effect; the silicone flame-retardant glue liquid coated on the outer surface of the meta-aramid fiber and the polyimide fiber can keep stable under the high temperature and not easy to decompose or age; when the silicone flame-retardant glue liquid meets the high temperature or the fire, the flame-retardant material can play the role, active free radicals are generated through the chemical reaction and combined with the free radicals in the burning area, so that the burning chain reaction is blocked, the effect of the flame-retardant is achieved, and the inorganic heat-insulating and insulating protective wire harness is formed; the decomposition of the decomposition product generated by the burning is prevented, the thermal decomposition of the high-molecular material is inhibited, and the high-temperature-resistant effect of the sewing thread is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the perspective view of the utility model;

[0017] Figure 2 It is the structure schematic view of the protective wire harness in the utility model.

[0018] Marked in the figure: 1-anti-tension core wire, 2-protection wire bundle, 21-dacron short fiber, 22-reinforced layer, 23-high temperature resistant layer, 221-polyester fiber, 222-nylon fiber, 231-metaramid fiber, 232-polyimide fiber. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. EMBODIMENT

[0020] Referring to Figure 1 and Figure 2The utility model provides a kind of high-temperature-resistant short fiber composite polyester sewing thread, including tensile core 1 and several protective thread bundles 2 around the outer surface of tensile core 1, protective thread bundle 2 is twisted with tensile core 1 outside with 'S' rotation direction, protective thread bundle 2 includes polyester staple 21, the outer surface of polyester staple 21 is around reinforced layer 22, the outer surface of reinforced layer 22 is around high-temperature-resistant layer 23;High-temperature-resistant layer 23 includes several meta-aramid fibers 231 and polyimide fibers 232, meta-aramid fibers 231 and polyimide fibers 232 are alternatively spaced around the outer surface of reinforced layer 22, meta-aramid fibers 231 and polyimide fibers 232 are twisted with the outside of reinforced layer 22 with 'S' rotation direction, and the outer surface of meta-aramid fibers 231 and polyimide fibers 232 is brushed with silicone fire -retardant glue liquid;Specifically, when sewing thread is used, the position of amido group in the chemical structure of meta-aramid fibers 231 in high-temperature-resistant layer 23 around the outermost is in meta-position in benzene ring, so that benzene ring covalent bond does not appear conjugation effect, macromolecular chain presents soft structure, and chemical structure is particularly stable, this structure makes that meta-aramid fibers does not burn in air, self-extinguishing when meeting fire, belongs to refractory fiber, has outstanding flame -retardant and high-temperature-resistant characteristics, can improve the high-temperature-resistant effect of entire sewing thread;Meanwhile, polyimide fibers 232 contain very stable aromatic heterocyclic structure in molecule, this structure makes that fiber can keep its stability and integrity under high temperature, is not prone to decomposition or combustion, so that it has excellent high-temperature-resistant performance, and polyimide fibers 232 has good carbonization capacity when burning, and a large number of heat-resistant benzene rings and aramide groups in fiber form carbonization layer when burning, this carbonization layer can isolate oxygen, prevent the further combustion of fiber, with certain flame -retardant effect;Meanwhile, silicone fire -retardant glue liquid coated on the outer surface of meta-aramid fibers 231 and polyimide fibers 232 can keep stable under high temperature, is not prone to decomposition or aging, when silicone fire -retardant glue liquid meets high temperature or flame, fire -retardant material will play a role, active free radicals are generated through chemical reaction and combine with free radicals in combustion zone, so as to block combustion chain reaction, reach the effect of flame -retardant and form an inorganic heat -insulating and insulating protective thread bundle, both prevent the decomposition of combustion generated material from escaping, and inhibit the thermal decomposition of high polymer material, further improve the high-temperature-resistant effect of sewing thread;The high-temperature-resistant effect of sewing thread is improved through the cooperation of above structure.

[0021] Refer to Figure 1 And Figure 2The reinforcing layer 22 comprises polyester fibers 221 and nylon fibers 222, which are alternately and spacedly arranged on the outer surface of the polyester staple 21, and are twisted on the outer surface of the polyester staple 21 in the "S" direction; specifically, the polyester fibers 221 arranged on the inner side of the high-temperature-resistant layer 23 have the characteristics of high strength, high wear resistance, good chemical corrosion resistance, high tensile strength, resistance to large tension without easy breaking, strong wear resistance to keep the sewing thread in good condition after frequent friction, thereby prolonging the service life of the sewing thread; the nylon fibers 222 used in cooperation with the polyester fibers 221 also have high strength and toughness, excellent wear resistance, and can be used for a long time under harsh conditions while maintaining good elasticity, and the high strength and wear resistance make the sewing thread can withstand large tension and friction during sewing, thereby improving the use effect of the sewing thread.

[0022] The implementation principle of the high-temperature-resistant short fiber composite polyester sewing thread embodiment of the present application is as follows:

[0023] When the sewing thread is used, the amide groups in the chemical structure of the aramid fiber 231 in the high-temperature-resistant layer 23 arranged on the outermost part are in the meta position in the benzene ring, so that the benzene ring covalent bond does not have a conjugation effect, and the macromolecular chain has a soft structure and a particularly stable chemical structure. This structure makes the aramid fiber not burn in the air and self-extinguish when encountering fire, and the aramid fiber is a difficult-to-burn fiber, has excellent flame-retardant and high-temperature-resistant properties, and can improve the high-temperature-resistant effect of the entire sewing thread. Meanwhile, the polyimide fiber 232 has a very stable heterocyclic aromatic structure in the molecule. This structure makes the fiber maintain its stability and integrity at high temperatures and is not easy to decompose or burn, so that the polyimide fiber 232 has excellent high-temperature-resistant performance. Moreover, the polyimide fiber 232 has good carbonization capacity when burning. A large number of heat-resistant benzene rings and arylimide groups in the fiber form a carbonized layer when burning. This carbonized layer can isolate oxygen and prevent further combustion of the fiber, so that the fiber has a certain flame-retardant effect. Meanwhile, the silicone flame-retardant glue liquid coated on the outer surface of the aramid fiber 231 and the polyimide fiber 232 can remain stable at high temperatures and is not easy to decompose or age. When the silicone flame-retardant glue liquid encounters high temperature or fire, the flame-retardant material will play a role, generate active free radicals through chemical reaction, and combine with free radicals in the combustion zone, thereby blocking the combustion chain reaction, achieving the effect of flame retardation, and forming an inorganic heat-insulating and insulating protective wire harness, which not only prevents the decomposition of the combustion generated material from escaping, but also inhibits the thermal decomposition of the high-molecular material, thereby further improving the high-temperature-resistant effect of the sewing thread.

[0024] In another aspect, the polyester fiber 221 arranged inside the high-temperature-resistant layer 23 has high strength, high wear resistance, good chemical corrosion resistance and other characteristics, it has high tensile strength, can withstand greater tension without breaking, stronger wear resistance makes the sewing thread can maintain good condition after frequent friction, thereby prolonging the service life of the sewing thread; The nylon fiber 222 used in cooperation with the polyester fiber 221 also has very high strength and toughness, and excellent wear resistance, can be used for a long time under harsh conditions, and maintains good elasticity, such high strength and wear resistance makes the sewing thread can withstand larger tension and friction sewing, improves the use effect of the sewing thread.

[0025] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A high temperature resistant short fiber composite polyester sewing thread, comprising a tensile core yarn (1) and a plurality of protective thread bundles (2) wound on the outer surface of the tensile core yarn (1), characterized in that: The protective wire harness (2) comprises polyester staple fibers (21), an outer surface of the polyester staple fibers (21) is provided with a reinforcing layer (22), and an outer surface of the reinforcing layer (22) is provided with a high-temperature-resistant layer (23). The high-temperature-resistant layer (23) comprises a plurality of meta-aramid fibers (231) and polyimide fibers (232), the meta-aramid fibers (231) and the polyimide fibers (232) are alternately and spacedly provided on the outer surface of the reinforcing layer (22), and outer surfaces of the meta-aramid fibers (231) and the polyimide fibers (232) are coated with silicone fire-retardant glue.

2. A high temperature resistant short fiber composite polyester sewing thread as claimed in claim 1, wherein: The reinforcing layer (22) comprises a plurality of polyester fibers (221) and nylon fibers (222), the polyester fibers (221) and the nylon fibers (222) are alternately and spacedly provided on the outer surface of the polyester staple fibers (21).

3. A high temperature resistant short fiber composite polyester sewing thread as claimed in claim 2, wherein the said polyester thread is a multifilament thread. 5 The polyester fibers (221) and the nylon fibers (222) are twisted in an "S" direction on the outside of the polyester staple fibers (21).

4. The high-temperature resistant short-fiber composite polyester sewing thread as described in claim 1, characterized in that: The meta-aramid fibers (231) and the polyimide fibers (232) are twisted in an "S" direction on the outside of the reinforcing layer (22).

5. A high temperature resistant short fiber composite polyester sewing thread as claimed in claim 1, wherein the said polyester thread is a multifilament thread. 5 The protective wire harness (2) is twisted in an "S" direction on the outside of the tensile core wire (1).

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