Flame-retardant and heat-insulating DTY (draw textured yarn) polyester composite yarn

Abstract

The utility model discloses a flame-retardant and heat-insulating DTY (draw textured yarn) polyester composite yarn which comprises a core yarn, a first covering fiber layer and a wrapping yarn layer, the core yarn comprises PTFE (Polytetrafluoroethylene) split film filaments and polyphenylene sulfide fiber yarns which are doubled and twisted; the first coating fiber layer is made of aerogel flame-retardant PP (polypropylene) fibers; the wrapping yarn layer comprises flame-retardant DTY polyester filaments. According to the flame-retardant and heat-insulation DTY polyester composite yarn, the PTFE split film filaments and the polyphenylene sulfide fibers adopted in the core yarn have the flame-retardant effect and the heat stability, and therefore the polyester composite yarn can have the good size stability. The aerogel flame-retardant PP fiber enables the composite filament to have a heat insulation effect and a flame-retardant effect.

Description

Technical Field

[0001] The utility model relates to a flame-retardant and heat-insulating DTY polyester composite yarn, belonging to the technical field of polyester composite yarns. Background Art

[0002] Polyester DTY, or polyester low-elastic yarn, is a type of textured yarn of polyester chemical fiber. It is made of polyester chips, high-speed spinning polyester pre-oriented yarn (POY), and then processed by drawing and false twisting. It has the characteristics of high breaking strength and elastic modulus of general polyester, excellent heat setting, good resilience, heat resistance, light resistance, strong corrosion resistance, easy to wash and quick drying, etc. It is an ideal raw material for knitting and weaving processing, and is suitable for making clothing fabrics, bedding and decorative items.

[0003] However, the flame retardant performance of polyester fiber itself is poor, and it is easy to shrink at high temperature, which makes the prepared fabric have poor dimensional stability at high temperature; when using flame retardant polyester to prepare fabrics, the yarn is also required to have good thermal insulation effect. How to prepare a flame retardant and thermal insulation DTY polyester yarn with small dimensional deformation at high temperature has become a problem to be solved. Utility Model Content

[0004] The utility model aims to provide a flame retardant and heat insulating DTY polyester composite yarn, which has good heat insulating and flame retardant effects and dimensional stability.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved as follows:

[0006] The utility model relates to a flame-retardant and heat-insulating DTY polyester composite yarn, comprising a core yarn, a first coating fiber layer and a wrapping wire layer; the core yarn comprises parallel-twisted PTFE split film filaments and polyphenylene sulfide fiber yarns; the first coating fiber layer uses aerogel flame-retardant PP fibers; the wrapping wire layer comprises flame-retardant DTY polyester filaments.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: the cross-section of the flame-retardant DTY polyester filament is hollow, including a fiber body and a hollow part, and a plurality of inner convex parts are arranged on the inner wall of the fiber body.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: a second covering fiber layer is arranged between the first covering fiber layer and the wrapping silk layer; the second covering fiber layer uses aromatic polyester fibers.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the core yarn also includes ultra-high molecular weight polyethylene filaments, which are twisted with PTFE split film filaments and polyphenylene sulfide fiber yarns.

[0010] On the basis of the above scheme and as a preferred scheme of the above scheme: the cross section of the flame-retardant DTY polyester filament includes a straight-line fiber body and protrusions symmetrically arranged on both sides of the fiber body.

[0011] The utility model has the following beneficial effects: the flame-retardant and heat-insulating DTY polyester composite yarn involved in the utility model has the PTFE split film filament and polyphenylene sulfide fiber used in the core yarn both having flame-retardant effect and thermal stability, which can make the polyester composite yarn have good dimensional stability. The aerogel flame-retardant PP fiber used makes the composite yarn have heat-insulating and flame-retardant effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 1 is a schematic diagram of the structure of the flame-retardant and heat-insulating DTY polyester composite yarn involved in Example 1;

[0013] Figure 2 is a schematic diagram of the cross-sectional structure of the flame-retardant DTY polyester filament involved in Example 2;

[0014] Figure 3 is a schematic structural diagram of the flame-retardant and heat-insulating DTY polyester composite yarn involved in Example 2;

[0015] Figure 4 It is a schematic diagram of the cross-sectional structure of the flame-retardant DTY polyester filament involved in Example 2.

[0016] The markings in the figure are as follows: 1-core yarn; 11-PTFE split film filament; 12-polyphenylene sulfide fiber yarn; 13-ultra-high molecular weight polyethylene filament; 2-first coating fiber layer; 3-wrapping fiber layer; 4-second coating fiber layer; 31-fiber body; 32-hollow part; 33-inner convex part; 34-convex part. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Embodiment 1

[0019] Combination Figure 1 and Figure 2 , this embodiment is described in detail. The flame-retardant and heat-insulating DTY polyester composite yarn involved in this embodiment includes a core yarn 1, a first coating fiber layer 2 and a wrapping yarn layer 3; the core yarn 1 includes PTFE split film filaments 11 and polyphenylene sulfide fiber yarns 12 twisted together; the first coating fiber layer 2 uses aerogel flame-retardant PP fibers; the wrapping yarn layer 3 includes flame-retardant DTY polyester filaments.

[0020] The PTFE material used in the PTFE split filament 11 and the polyphenylene sulfide fiber used in the polyphenylene sulfide fiber yarn both have good flame retardant effects and thermal stability. When the composite yarn is subjected to high temperature, it can maintain dimensional stability and is not easy to deform, so that the prepared fabric also has good dimensional stability.

[0021] The aerogel flame retardant PP fiber used is prepared by adding porous aerogel PP masterbatch during the preparation of PP fiber. Due to the porous aerogel structure, the PP fiber has good thermal insulation effect.

[0022] Furthermore, in order to further improve the heat insulation effect of the composite yarn, the cross-section of the flame-retardant DTY polyester filament is hollow, including a fiber body 31 and a hollow portion 32 , and a plurality of inner protrusions 33 are arranged on the inner wall of the fiber body 31 .

[0023] Embodiment 2

[0024] Combination Figure 3 and Figure 4 , this embodiment is described in detail. The flame retardant and heat insulating DTY polyester composite yarn involved in this embodiment is different from that in the first embodiment in that a second coating fiber layer 4 is provided between the first coating fiber layer 2 and the wrapping fiber layer 3; the second coating fiber layer 4 is made of aromatic polyester fiber. Aromatic polyester fiber is Viktoron, which has good light resistance and flame retardant effect.

[0025] Another difference from the first embodiment is that the core yarn 1 further comprises ultra-high molecular weight polyethylene filaments 13, which are twisted together with the PTFE split film filaments 11 and the polyphenylene sulfide fiber yarns 12. The ultra-high molecular weight polyethylene filaments 13 can make the composite yarn have higher strength.

[0026] Another difference from the first embodiment is that the cross section of the flame retardant DTY polyester filament includes a straight-line fiber body 31 and protrusions 34 symmetrically arranged on both sides of the fiber body. When the composite yarn involved in this embodiment is used to prepare a flame retardant pile fabric, since the fiber body is straight-lined and the protrusions are arranged on both sides, the pile formed by the flame retardant DTY polyester filament can be well upright.

[0027] 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 and heat insulating DTY polyester composite yarn, characterized in that: The invention comprises a core yarn (1), a first coating fiber layer (2) and a wrapping silk layer (3); the core yarn (1) comprises parallel-twisted PTFE split film filaments (11) and polyphenylene sulfide fiber yarns (12); the first coating fiber layer (2) uses aerogel flame-retardant PP fibers; and the wrapping silk layer (3) comprises flame-retardant DTY polyester filaments.

2. The flame-retardant and heat-insulating DTY polyester composite yarn according to claim 1, characterized in that: The flame-retardant DTY polyester filament has a hollow cross-section, comprising a fiber body (31) and a hollow portion (32), and a plurality of inner convex portions (33) are arranged on the inner wall of the fiber body (31).

3. The flame-retardant and heat-insulating DTY polyester composite yarn according to claim 1, characterized in that: A second covering fiber layer (4) is arranged between the first covering fiber layer (2) and the wrapping silk layer (3); the second covering fiber layer (4) is made of aromatic polyester fibers.

4. The flame-retardant and heat-insulating DTY polyester composite yarn according to claim 1, characterized in that: The core yarn (1) also includes ultra-high molecular weight polyethylene filaments (13) twisted together with PTFE split film filaments (11) and polyphenylene sulfide fiber yarns (12).

5. The flame-retardant and heat-insulating DTY polyester composite yarn according to claim 1, characterized in that: The cross section of the flame-retardant DTY polyester filament comprises a straight-line fiber body (31) and raised portions (34) symmetrically arranged on both sides of the fiber body.

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