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A preparing method of a polyethylene fine-denier moisture-conducting fiber

A polyethylene and wet fiber technology, applied in the direction of single-component polyolefin rayon, dry spinning method, stretch spinning method, etc. Water-based, poor wearing comfort and other issues, to achieve the effect of improving the moisture-wicking effect, good textile processing performance, and improved wearing performance

Inactive Publication Date: 2016-10-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The fibers prepared in the above patents are mainly based on the high-strength and high-modulus properties of the fibers, or optimize the production process, or improve the production methods, but none of them involve the fine-denier moisture-conducting properties of the fibers, and they do not overcome the lack of hydrophilicity of polyethylene fibers and poor wearing comfort. The disadvantages are that there is no groove in the axial direction and there is no certain natural curl, and the moisture absorption, moisture conduction and moisture removal of the fiber cannot be achieved through the wicking effect of the fine grooves.

Method used

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Embodiment 1

[0019] Embodiment 1: a kind of production technology of polyethylene superfine denier fiber:

[0020] Prepare the swelling suspension of polyethylene powder in decalin. The mass ratio of ultra-high molecular weight polyethylene and decalin for fibers with a molecular weight of 4 million to 8 million is 1:10. Extruded and sheared by a twin-screw extruder , fully dissolved to obtain polyethylene solution, the temperature of each zone of the screw is 90-180°C; the polyethylene solution is spun through the spinneret, and the tow is removed from the decalin by the hot air circulation system, which is a closed heating chamber with nitrogen circulation. Wind temperature 145°C, air volume 135 m 3 / h; After pre-stretching, the stretching ratio is 3.0, and thermal stretching is performed in one or more steps, the temperature of the multi-stage thermal stretching hot box is 140-150°C, and the total thermal stretching ratio is 5.0; One or more relaxation steps, the relaxation temperature...

Embodiment 2

[0023] Embodiment 2: a kind of production technology of polyethylene superfine denier fiber:

[0024] Prepare the swelling suspension of polyethylene powder in decalin. The mass ratio of ultra-high molecular weight polyethylene and decalin for fibers with a molecular weight of 4 million to 8 million is 1:20. Extruded and sheared by a twin-screw extruder The polyethylene material is fully unwound with polyethylene solution, and the temperature of each zone of the screw is 90-180°C; the polyethylene solution is spun on the spinneret, and the tow is removed from the decalin by the hot air circulation system, which is a closed heating chamber with nitrogen circulation. Room, air temperature 70°C, air volume 160 m 3 / h; after pre-stretching, the stretching ratio is 1.0, and hot-stretched in one or more steps, the temperature of the multi-stage hot-stretching hot box is 120-140°C, and the total stretching ratio is 8.0; One or more relaxation steps, the relaxation temperature is 120...

Embodiment 3

[0027] Embodiment 3: a kind of production technology of polyethylene superfine denier fiber:

[0028] Prepare the swelling suspension of polyethylene powder in decalin. The mass ratio of ultra-high molecular weight polyethylene and decalin for fibers with a molecular weight of 4 million to 8 million is 1:10. Extruded and sheared by a twin-screw extruder The polyethylene material is fully unwound with polyethylene solution, and the temperature of each zone of the screw is 90-180°C; the polyethylene solution is spun through the spinneret, and the tow is removed from the decalin by the hot air circulation system, which is closed heating with nitrogen circulation Chamber, air temperature 110°C, air volume 90 m 3 / h; After pre-stretching, the stretching ratio is 4.0, and thermal stretching is carried out in one or more steps, the temperature of the multi-stage thermal stretching hot box is 90-120°C, and the total thermal stretching ratio is 10.0; One or more relaxation steps, the ...

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Abstract

A preparing method of a polyethylene fine-denier moisture-conducting fiber is disclosed. The polyethylene fine-denier moisture-conductive fiber the fineness of which ranges from 22 dtex to 1776 dtex is obtained by swelling ultra-high-molecular-weight polyethylene used for fiber and having a molecular weight of 4-8 million in decalin to obtain a suspension, dissolving and shearing through a twin-screw extruder to allow polyethylene macromolecular chains to be fully untwisted to form a uniform spinning solution, spinning through a spinneret plat, removing the decalin in a silk bundle in a hot-wind circulation system, pre-stretching, performing one or more thermal stretch steps and performing one or more loosing steps. The hot-wind circulation system is a sealed heating chamber having nitrogen circulated therein. The polyethylene fine-denier moisture-conductive fiber is lighter, thinner and softer than conventional polyethylene fibers, maintains high-strength and high-modulus characters. The cross section of the fiber has an oval shape, an egg shape, a dog bone shape, a bean shape or other special shapes. The fiber is provided with micro grooves and slots at the axial direction. Moisture-conducting performance of the fiber is obviously improved than that of wet-process fibers. The fiber is obviously improved in wearability, and fabric of the fiber has moisture conducting and rapidly drying and refreshing properties.

Description

technical field [0001] The invention relates to the technical field of synthetic fiber production, in particular to a method for producing polyethylene fiber. Background technique [0002] Polyethylene with a linear structure with a viscosity average molecular weight of more than 1.5 million. The molecular chain is in the shape of a plane zigzag. Polyethylene fiber has excellent properties such as high strength, high modulus, high energy absorption and cutting resistance, which can meet the functional requirements of protective products, so it has extremely high application value in the fields of cables, non-woven fabrics, hard body armor, etc. . However, its structure is regular, lacks hydrophilicity, and cannot take into account the comfort of protective clothing. Therefore, there has been less attention to the application of this fiber in the fields of soft protective products and clothing home textiles that require high moisture-conducting performance at home and abroad...

Claims

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Application Information

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IPC IPC(8): D01F6/04D01D5/04D01D5/14
Inventor 陈建军赵付平肖平杨勇郭团春周桂存高玉文沈云
Owner CHINA PETROLEUM & CHEM CORP
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