Warm-keeping yarn

Abstract

The utility model discloses a warm-keeping yarn, which relates to the field of yarns, and is characterized in that the warm-keeping yarn comprises a plurality of first fibers and a plurality of second fibers, the length of the second fibers is smaller than that of the first fibers, fluff is formed at the tail ends of the second fibers, and the crimp shrinkage rate of the second fibers is not lower than 15%. The first fiber yarn and the second fiber yarn are hollow fibers, and the second fiber yarn is located at the fluff position to form a cavity which is more zigzag relative to the interior of the first fiber yarn. Compared with the prior art, the polyester fibers have good crimp shrinkage rate, the interlaced yarns have good bulkiness, villi formed at the tail ends of the second fibers are obviously crimped, when gas flows in the cavities in the second fibers, kinetic energy of airflow is lost in the steering process due to the zigzag cavity structure, and therefore the effect that the air flows in the cavities in the second fibers is improved is achieved. Therefore, the effect of slowing down the airflow in the cavity is achieved, namely the heat retention effect of the hollow structure of the second fiber yarn is improved, and the problem that the heat retention of the broken hollow fiber is reduced due to sanding is solved.

Description

Technical Field

[0001] This utility model relates to the field of yarn, and more specifically, to a thermal insulation yarn. Background Technology

[0002] Frizzing is a common fabric processing technique that aims to break and loosen some fibers on the surface of the yarn, thereby forming a short nap layer on the fabric surface and improving the fabric's warmth retention.

[0003] Besides replacing materials, a common way to improve the warmth of fabrics by improving the yarn is to process the fibers in the yarn into hollow fibers. The hollow structure reduces heat exchange by improving the warmth of the fabric. However, napping will cause the originally closed hollow structure to connect with the outside, which will reduce the warmth provided by the hollow structure. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a thermal insulation yarn.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a warm yarn comprising a plurality of first fiber filaments and a plurality of second fiber filaments, wherein the length of the second fiber filaments is less than the length of the first fiber filaments, the ends of the second fiber filaments form fluff, the crimping shrinkage rate of the second fiber filaments is not less than 15%, the first fiber filaments and the second fiber filaments are both hollow fibers, and the second fiber filaments form a cavity at the fluff that is more tortuous than that inside the first fiber filaments.

[0006] The present invention is further configured to include a third fiber filament, wherein the fineness of the third fiber filament is greater than that of the first fiber filament and the second fiber filament.

[0007] The present invention is further configured such that the number of the third fiber filaments is less than the number of the first fiber filaments and the number of the second fiber filaments.

[0008] The present invention is further configured such that the hollowness of the first fiber is greater than 15%.

[0009] The present invention is further configured such that the fineness of the first fiber and the fineness of the second fiber are both less than 1.05 dpf.

[0010] The present invention is further configured such that both the first fiber and the second fiber are made of polyester fiber.

[0011] In summary, this invention has the following beneficial effects: polyester fibers have a good crimp shrinkage rate, and the network yarns have good bulkiness, causing the fluff formed at the ends of the second fiber filaments to curl significantly. When gas flows through the cavities within the second fiber filaments, the tortuous cavity structure causes the airflow to lose kinetic energy during the turning process, thereby slowing down the airflow within the cavity. This improves the heat retention effect of the hollow structure of the second fiber filaments and alleviates the problem of decreased heat retention caused by the breakage of hollow fibers due to abrasion. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention after it has been knitted and brushed.

[0013] In the diagram: 1. First fiber; 2. Second fiber; 3. Third fiber. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0015] Example: A thermal insulation yarn, such as Figure 1 As shown, it includes several first fiber filaments 1 and several second fiber filaments 2. The length of the second fiber filament 2 is less than the length of the first fiber filament 1. The ends of the second fiber filament 2 form fluff. The crimping shrinkage rate of the second fiber filament 2 is not less than 15%. Both the first fiber filament 1 and the second fiber filament 2 are hollow fibers. The second fiber filament 2 forms a more tortuous cavity at the fluff compared to the first fiber filament 1. Both the first fiber filament 1 and the second fiber filament 2 are made of polyester fiber.

[0016] Specifically, in this embodiment, the thermal insulation yarn is made by melting polyester masterbatch and processing it into a network yarn through equipment such as a hollow spinneret and a networker. The network yarn structure consists of first fiber filament 1 and second fiber filament 2. The polyester fiber filaments, i.e., polyester fibers, have good crimp shrinkage. The network yarn has good bulkiness. Before napping, the first fiber filament 1 and second fiber filament 2 are hollow fiber filaments of the same specification. After the yarn is woven into fabric and then napped, the broken hollow fiber filaments become the second fiber filament 2, the continuous hollow fiber filaments become the first fiber filament 1, and the broken ends of the second fiber filament 2 form pile. The pile gathers on the surface of the fabric to form a short pile layer, improving the insulation. The improved warmth retention is achieved through high-temperature treatment in a fixed-shape heating box after brushing. The good fluffiness of the network yarn itself allows the broken ends of the second fiber filament 2 to produce longer fluff. Combined with the high-temperature treatment in the fixed-shape heating box, the fluff formed at the ends of the second fiber filament 2 becomes significantly curled. That is, the second fiber filament 2 forms a more tortuous cavity at the fluff compared to the first fiber filament 1. When gas flows in the cavity of the second fiber filament 2, the tortuous cavity structure causes the airflow to lose kinetic energy during the turning process, thereby slowing down the airflow in the cavity. This improves the warmth retention of the hollow structure of the second fiber filament 2 and alleviates the problem of reduced warmth retention caused by brushing of broken hollow fibers.

[0017] like Figure 1 As shown, it also includes a third fiber filament 3. The fineness of the third fiber filament 3 is greater than that of the first fiber filament 1 and the second fiber filament 2. The number of third fiber filaments 3 is less than that of the first fiber filament 1 and the second fiber filament 2. Specifically, the third fiber filament 3 is a solid fiber, and the material of the third fiber filament 3 is the same as that of the first fiber filament 1. Furthermore, the diameter of the third fiber filament 3 is greater than that of the first fiber filament 1 and the second fiber filament 2. That is, the deformation resistance of the third fiber filament 3 is greater than that of the first fiber filament 1 and the second fiber filament 2. This allows the third fiber filament 3 to improve the tensile strength of the yarn as a whole. The smaller number of third fiber bundles reduces the impact of the third fiber filament 3 on the warmth retention of the yarn.

[0018] like Figure 1 As shown, the hollowness of the first fiber filament 1 is greater than 15%, and the fineness of both the first fiber filament 1 and the second fiber filament 2 is less than 1.05 dpf. Specifically, in the cross-section of the first fiber filament 1, the area of ​​the hollow part accounts for 15% of the total cross-sectional area, which ensures the warmth retention of the first fiber filament 1. By reducing the fineness of the first fiber filament 1 and the second fiber filament 2, the nap produced by brushing is made finer, increasing the surface feel of the yarn after brushing.

[0019] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A thermal insulation yarn, characterized in that: It includes several first fiber filaments (1) and several second fiber filaments (2), the length of the second fiber filaments (2) is less than the length of the first fiber filaments (1), the ends of the second fiber filaments (2) form fluff, the curling shrinkage rate of the second fiber filaments (2) is not less than 15%, the first fiber filaments (1) and the second fiber filaments (2) are both hollow fibers, and the second fiber filaments (2) form a cavity that is tortuous relative to the first fiber filaments (1) at the fluff.

2. The thermal insulation yarn according to claim 1, characterized in that: It also includes a third fiber filament (3), the fineness of which is greater than that of the first fiber filament (1) and the second fiber filament (2).

3. The thermal insulation yarn according to claim 2, characterized in that: The number of the third fiber filament (3) is less than the number of the first fiber filament (1) and the number of the second fiber filament (2).

4. The thermal insulation yarn according to claim 1, characterized in that: The hollowness of the first fiber filament (1) is greater than 15%.

5. The thermal insulation yarn according to claim 1, characterized in that: The fineness of the first fiber filament (1) and the fineness of the second fiber filament (2) are both less than 1.05 dpf.

6. The thermal insulation yarn according to claim 1, characterized in that: Both the first fiber filament (1) and the second fiber filament (2) are made of polyester fiber.

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