Polyester composite yarn

Abstract

The utility model discloses a polyester composite yarn which comprises a core yarn and a wrapping yarn layer spirally wrapping the outer side of the core yarn. The core yarn comprises a high-strength polyester filament yarn and a parallel bi-component polyester filament yarn which are doubled and twisted; the wrapping yarn layer comprises polyester high-shrinkage pre-polymerized yarn (POY) and polyester low-shrinkage fully drawn yarn (FDY) which are arranged in parallel; the core wire and the wrapping wire layer are fixedly connected through bonding points arranged in the length direction. According to the polyester composite filament, the high-strength polyester filament yarn is adopted as the core yarn, so that the composite filament has high strength. And the wrapped filaments are made of two kinds of polyester filament yarns with different shrinkage rates, so that the composite filament has fluffiness and crimpness.

Description

Technical Field

[0001] The utility model relates to a polyester composite filament, belonging to the technical field of chemical synthetic fiber filament composite filaments. Background Art

[0002] A composite filament refers to a filament formed by combining two or more filaments. The composite filament can endow the filament yarn with physical properties different from those of a single-material filament. For example, a composite filament made of filaments with different shrinkage rates has characteristics such as fluffiness and curl. How to prepare a polyester composite filament with good strength and with fluffiness and curl characteristics has become a problem to be solved. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a polyester composite filament. Through the bonding points, the wrapped filament layer can be fixed to the core filament, and the high-strength polyester filament used can provide strength.

[0004] To solve the above technical problems, the purpose of the utility model is realized as follows:

[0005] A polyester composite filament related to the utility model includes a core filament and a wrapped filament layer spirally wrapped outside the core filament; the core filament includes a high-strength polyester filament and a side-by-side type bicomponent polyester filament twisted together; the wrapped filament layer includes a polyester high-shrinkage pre-oriented yarn POY and a polyester low-shrinkage fully drawn yarn FDY arranged in parallel; the core filament and the wrapped filament layer are fixedly connected through bonding points arranged along the length direction.

[0006] Based on the above solution and as a preferred solution of the above solution: the side-by-side type bicomponent polyester filament includes a conventional PET component and a low-melting-point PET component arranged side by side.

[0007] Based on the above solution and as a preferred solution of the above solution: the cross-section of the polyester low-shrinkage fully drawn yarn FDY includes a fiber main body in a shape of a straight line and convex portions symmetrically arranged on both sides of the fiber main body.

[0008] Based on the above solution and as a preferred solution of the above solution: the wrapped filament layer further includes a polyester-based composite conductive filament.

[0009] Based on the above solution and as a preferred solution of the above solution: the polyester-based composite conductive filament includes a trilobal core layer and a polyester-based layer wrapped outside the core layer.

[0010] The beneficial effect of the utility model is: a polyester composite filament related to the utility model uses a high-strength polyester filament as the core filament, making the composite filament have higher strength. And the wrapped filament uses two polyester filaments with different shrinkage rates, making the composite filament have fluffiness and curl. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the polyester composite filament involved in the first embodiment;

[0012] Figure 2 is a schematic cross-sectional structure diagram of the parallel double-component polyester filament involved in the first embodiment;

[0013] Figure 3 is a schematic cross-sectional structure diagram of the polyester low-shrinkage fully drawn yarn FDY involved in the first embodiment;

[0014] Figure 4 is a schematic cross-sectional structure diagram of the polyester-based composite conductive filament involved in the second embodiment.

[0015] The markings in the figures are explained as follows: 1 - core filament; 2 - wrapped filament layer; 3 - conventional PET component; 4 - low-melting-point PET component; 11 - fiber body; 12 - raised part; 21 - core layer; 22 - polyester base layer. Detailed Description of the Invention

[0016] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0017] First Embodiment

[0018] Combined with Figure 1 、 Figure 2 and Figure 3 , a detailed description of this embodiment is given. A polyester composite filament involved in this embodiment

[0019] includes a core filament 1 and a wrapped filament layer 2 spirally wrapped around the outside of the core filament 1; the core filament 1 includes a high-strength polyester filament and a parallel double-component polyester filament twisted together; the wrapped filament layer 2 includes a polyester high-shrinkage pre-oriented yarn POY and a polyester low-shrinkage fully drawn yarn FDY arranged in parallel; the core filament 1 and the wrapped filament layer 2 are fixedly connected through bonding points arranged along the length direction.

[0020] Furthermore, the parallel double-component polyester filament includes a conventional PET component 3 and a low-melting-point PET component 4 arranged in parallel. The bonding points arranged along the length direction between the core filament 1 and the wrapped filament layer 2 are formed by hot pressing, which causes the low-melting-point PET component to melt, so that the low-melting-point PET component bonds the high-strength polyester filament with the polyester high-shrinkage pre-oriented yarn POY and the polyester low-shrinkage fully drawn yarn FDY in the wrapped filament layer, thus forming the bonding points.

[0021] Further, the cross-section of the polyester low-shrinkage full-drawn yarn FDY includes a fiber main body 11 in a shape of a straight line and convex portions 12 symmetrically arranged on both sides of the fiber main body 11. In this embodiment, four convex portions 12 are selected. Among these four convex portions 12, the convex portions 12 on both sides are located at both ends of the fiber body 11. Since the convex portions 12 are symmetrically distributed on both sides of the fiber body 33, it is similar to the shape of a caterpillar. When using the polyester composite filament involved in the present invention as a raising fabric, the uprightness of the formed fluff is good.

[0022] Embodiment 2

[0023] Combined with Figure 4 , a detailed description of this embodiment is given. The difference between the polyester composite filament involved in this embodiment and that in Embodiment 1 is that: the wrapped filament layer 2 further includes a polyester-based composite conductive filament. The polyester-based composite conductive filament includes a trilobal core layer 21 and a polyester-based layer 22 wrapped outside the core layer 21. The core layer 21 is antistatic polyamide.

[0024] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A polyester composite yarn, characterized in that: The invention comprises a core wire (1) and a wrapping wire layer (2) spirally wrapped around the outer side of the core wire (1); the core wire (1) comprises parallel-twisted high-strength polyester filaments and parallel-type bicomponent polyester filaments; the wrapping wire layer (2) comprises parallel-arranged polyester high-shrinkage pre-polyester yarns POY and polyester low-shrinkage fully-drawn yarns FDY; the core wire (1) and the wrapping wire layer (2) are fixedly connected via bonding points arranged along the length direction.

2. A polyester composite yarn according to claim 1, characterized in that: The parallel-type bicomponent polyester filament comprises a conventional PET component (3) and a low-melting-point PET component (4) arranged in parallel.

3. The polyester composite yarn according to claim 1, characterized in that: The cross section of the polyester low-shrinkage fully-drawn yarn FDY comprises a straight-line fiber body (11) and raised portions (12) symmetrically arranged on both sides of the fiber body (11).

4. The polyester composite yarn according to claim 1, characterized in that: The wrapping filament layer (2) also includes polyester-based composite conductive filaments.

5. A polyester composite yarn according to claim 4, characterized in that: The polyester-based composite conductive filament comprises a three-leaf-shaped core layer (21) and a polyester-based layer (22) wrapped around the outside of the core layer (21).

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