Flame-retardant yarn

Abstract

The utility model discloses a flame-retardant yarn, which comprises a core yarn formed by doubling and twisting PTFE (Polytetrafluoroethylene) split film filaments and polyacrylonitrile pre-oxidized fiber yarns, and a flame-retardant layer formed by doubling and twisting the PTFE split film filaments and the polyacrylonitrile pre-oxidized fiber yarns, the fasciated yarn comprises flame-retardant nylon fiber yarn and flame-retardant conductive acrylic fiber yarn which spirally wrap the outer side of the core yarn. According to the flame-retardant yarn disclosed by the utility model, the used PTFE split film filaments have the characteristics of high temperature resistance, acid resistance, alkali resistance and oxidation resistance, so that the yarn has good dimensional stability. The aramid fibers and the flame-retardant antistatic blended yarns used in the flame-retardant antistatic blended yarn enable the flame-retardant antistatic blended yarn to have a permanent flame-retardant effect and an antistatic effect, so that the influence of static electricity on a wearer during use is avoided.

Description

Technical Field

[0001] The utility model relates to a flame retardant yarn and belongs to the technical field of textile yarns. Background Art

[0002] Types of protective clothing include fire protection clothing, industrial protective clothing, medical protective clothing, military protective clothing and protective clothing for special groups. Protective clothing is mainly used in fire protection, military industry, shipbuilding, petroleum, chemical industry, painting, cleaning and disinfection, laboratories and other industries and departments. Protective clothing is generally made of natural materials such as cotton, wool, silk, and synthetic materials such as rubber, plastic, resin, and synthetic fiber. It has the characteristics of anti-penetration function, good air permeability, high strength, and high resistance to hydrostatic pressure. It should be mainly used in industrial, electronic, medical, chemical defense, and anti-bacterial infection environments. According to the protective function, it can be divided into: radiation protection clothing, cold protection clothing, anti-static clothing, bulletproof clothing, etc. In particular, some usage scenarios require flame-retardant fabrics to have good antistatic properties. The usual practice is to apply antistatic coating to flame-retardant fabrics, which will make the flame-retardant fabrics thicker and less breathable. In addition, conventional flame-retardant yarns will change in size in high temperature situations, which will make the dimensional stability of flame-retardant fabrics worse. How to prepare a flame-retardant yarn so that it has dimensional stability and good antistatic effect on the premise of having flame retardant effect. Summary of the invention

[0003] The utility model aims to provide a flame retardant yarn, which has the characteristics of flame retardancy, antistatic property and dimensional stability.

[0004] In order to solve the above technical problems, the purpose of the utility model is achieved as follows:

[0005] The utility model relates to a flame retardant yarn, which comprises:

[0006] The core yarn is formed by twisting PTFE split film filaments and polyacrylonitrile pre-oxidized filament yarns;

[0007] The wrapped yarn comprises a flame retardant nylon fiber yarn and a flame retardant conductive acrylic fiber yarn which are spirally wrapped around the outer side of the core yarn.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the core yarn also includes radiation-proof yarns twisted together with PTFE split film filaments and polyacrylonitrile pre-oxidized filament yarns.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the radiation protection yarn includes metal fiber yarn and silver fiber coated on the outside of the metal fiber yarn.

[0010] On the basis of the above scheme and as a preferred scheme of the above scheme: a first covering fiber layer is arranged between the core yarn and the wrapping yarn; the first covering fiber layer is a heat-insulating flame-retardant fiber.

[0011] On the basis of the above scheme and as a preferred scheme of the above scheme: the thermal insulation flame retardant fiber is a flame retardant thermal insulation sodium alginate / polyvinyl alcohol aerogel fiber.

[0012] On the basis of the above solution and as a preferred solution of the above solution: a second covering fiber layer is arranged between the wrapping yarn and the first covering fiber layer, and the second covering fiber layer is flame-retardant and antibacterial fiber.

[0013] The utility model has the following beneficial effects: the flame-retardant yarn of the utility model has the characteristics of high temperature resistance, acid resistance, alkali resistance and oxidation resistance, so that the yarn has good dimensional stability. The aramid fiber and flame-retardant antistatic blended yarn used therein make the yarn have permanent flame-retardant effect and antistatic effect, thereby avoiding the influence of static electricity on the wearer during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the cross-sectional structure of the flame-retardant yarn involved in Example 1;

[0015] Figure 2 is a schematic diagram of the cross-sectional structure of the flame-retardant yarn involved in the second embodiment;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the flame-retardant yarn involved in Example 3.

[0017] The markings in the figure are as follows: 1-core yarn; 11-PTFE split film filament; 12-polyacrylonitrile pre-oxidized silk yarn; 13-radiation protection yarn; 2-wrapped yarn; 21-flame retardant nylon fiber yarn; 22-flame retardant conductive acrylic fiber yarn; 3-first coating fiber layer; 4-second coating fiber layer. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. Example

[0019] Combination Figure 1 , this embodiment is described in detail. The flame-retardant yarn involved in this embodiment comprises: a core yarn 1, which is twisted by PTFE split film filaments 11 and polyacrylonitrile pre-oxidized yarns 12. A wrapping yarn 2, which comprises a flame-retardant nylon fiber yarn 21 and a flame-retardant conductive acrylic fiber yarn 22 spirally wrapped around the outside of the core yarn 1.

[0020] The PTFE split film filaments 11 used in the core yarn 1 have good thermal stability and remain dimensionally stable when heated, so that the flame retardant fabric prepared from the flame retardant yarn can remain dimensionally stable.

[0021] The performance parameters of the polyacrylonitrile pre-oxidized fiber used in the polyacrylonitrile pre-oxidized silk yarn are: fiber linear density is 2.0-2.2dtex, single fiber strength is 1.6-1.7cN / dtex, fiber length is 38mm, elongation at break is 21-22%, tensile strength is 220-240MPa, limiting oxygen index (LOI) is 47-49%, and it has good flame retardant effect.

[0022] The flame-retardant conductive acrylic fiber yarn 22 used makes the flame-retardant yarn have a good anti-static effect, avoiding the influence of static electricity on the wearer during use. In addition, the flame-retardant nylon fiber used in the flame-retardant nylon fiber yarn 21 and the flame-retardant conductive acrylic fiber used in the flame-retardant conductive acrylic fiber yarn 22 both have a good wear-resistant effect, thereby improving the wear resistance of the flame-retardant yarn. Example

[0023] Combination Figure 2 , this embodiment is described in detail. The flame retardant yarn involved in this embodiment is different from that in the first embodiment in that the core yarn 1 also includes a radiation-proof yarn 13 twisted with PTFE split film filaments 11 and polyacrylonitrile pre-oxidized yarns 12. The radiation-proof yarn 13 can make the fabric prepared by the flame retardant yarn have radiation-proof performance, so that the wearer can avoid damage caused by radiation when using it.

[0024] Furthermore, the radiation protection yarn 13 includes metal fiber yarn and silver fiber coated on the outside of the metal fiber yarn. Example

[0025] Combination Figure 3 The present embodiment is described in detail. The flame retardant yarn of the present embodiment is different from that of the second embodiment in that a first covering fiber layer 3 is provided between the core yarn 1 and the wrapping yarn 2; the first covering fiber layer 3 is a heat insulating flame retardant fiber.

[0026] Furthermore, the heat insulating flame retardant fiber is a flame retardant heat insulating sodium alginate / polyvinyl alcohol aerogel fiber. The use of the heat insulating flame retardant fiber enables the fabric prepared by the flame retardant yarn to have only a heat insulating effect, thereby further protecting the wearer.

[0027] Another difference from the first embodiment is that a second coating fiber layer 4 is provided between the wrapping yarn 2 and the first coating fiber layer 3, and the second coating fiber layer 4 is a flame retardant antibacterial fiber. The flame retardant antibacterial fiber is specifically a flame retardant antibacterial PET fiber, which can provide an antibacterial effect in addition to having a flame retardant effect.

[0028] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A flame retardant yarn, characterized in that: The flame retardant yarn comprises: A core yarn (1), wherein the core yarn (1) is formed by twisting PTFE split film filaments (11) and polyacrylonitrile pre-oxidized filament yarns (12); A wrapped yarn (2), the wrapped yarn (2) comprising a flame-retardant nylon fiber yarn (21) and a flame-retardant conductive acrylic fiber yarn (22) which are spirally wrapped around the outside of a core yarn (1).

2. A flame retardant yarn according to claim 1, characterized in that: The core yarn (1) further comprises a radiation-proof yarn (13) formed by twisting PTFE split film filaments (11) and polyacrylonitrile pre-oxidized filament yarns (12).

3. A flame retardant yarn according to claim 2, characterized in that: The radiation protection yarn (13) comprises metal fiber yarn and silver fibers coated on the outside of the metal fiber yarn.

4. The flame retardant yarn according to claim 1, characterized in that: A first covering fiber layer (3) is provided between the core yarn (1) and the wrapping yarn (2); the first covering fiber layer (3) is heat-insulating and flame-retardant fiber.

5. A flame retardant yarn according to claim 4, characterized in that: The heat-insulating flame-retardant fiber is a flame-retardant heat-insulating sodium alginate / polyvinyl alcohol aerogel fiber.

6. A flame retardant yarn according to claim 4, characterized in that: A second covering fiber layer (4) is provided between the wrapping yarn (2) and the first covering fiber layer (3), and the second covering fiber layer (4) is flame-retardant and antibacterial fiber.

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