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Ultrahigh molecular weight polyethylene short fiber and preparation method thereof

A technology of ultra-high molecular weight and polyethylene, applied in the direction of single-component polyolefin rayon, fiber chemical characteristics, single-component synthetic polymer rayon, etc., can solve the problem of single-filament fineness and low yarn strength and other problems, to achieve the effect of easy gluing, wide application and energy saving

Inactive Publication Date: 2017-01-04
SINOPEC YIZHENG CHEM FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, its application field is also limited to yarn products, the yarn strength is low, and the single filament fineness cannot be below 2.0dtex

Method used

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  • Ultrahigh molecular weight polyethylene short fiber and preparation method thereof
  • Ultrahigh molecular weight polyethylene short fiber and preparation method thereof
  • Ultrahigh molecular weight polyethylene short fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Ultra-high molecular weight polyethylene with an intrinsic viscosity of 23.6dl / g is extruded with a twin-screw extruder after being swollen with decahydronaphthalene, spun through a spinneret, desolvated by a hot air circulation system, and the temperature in the front zone of nitrogen flow is It is 115°C, and the temperature in the middle and rear areas is 70-110°C and gradually decreases. Then it is pre-drawn, the pre-drawing temperature is 125°C, and the draw ratio is 3.14, and then it is subjected to three-stage thermal stretching. Relaxation stretching, the relaxation temperature is 146° C., and the relaxation ratio is 1.0 to prepare ultra-high molecular weight polyethylene filaments. The filament is bundled, the bundle fineness is 200,000 denier, the crimp wheel width bears 3,000 dtex per mm, the bundle tension is 0.1cN / dtex, and then the filament oil is washed with warm water and oiled by spraying oil rollers. The oil is anionic Type high-strength pol...

Embodiment 2

[0031] Embodiment 2: roughly the same as Embodiment 1, the difference is that the intrinsic viscosity of ultra-high molecular weight polyethylene is 20dl / g, and after swelling with paraffin, it is extruded with a twin-screw extruder, sprayed through a spinneret, and passed through a spinneret. The hot air circulation system desolventizes, the temperature in the front zone of the nitrogen flow is 150°C, and the temperature in the middle and rear zone is 110-140°C and gradually decreases. 84 2400D / 1380f ultra-high molecular weight polyethylene staple fibers are assembled into a large tow of 200,000 deniers. The crimping wheel width per mm bears 10,000 dtex, and the bundle tension is 0.15cN / dtex. The large tow is desalted Soak in a water bath to wash away the filament oil, and then immerse the tow in the short fiber anionic high-strength polyethylene staple fiber oil on the oil tank to control the oil content to 0.5%. The feeding wheel of the crimper is sent into the stuffing ext...

Embodiment 3

[0032] Embodiment 3: roughly the same as Example 1, the difference is that the intrinsic viscosity of ultra-high molecular weight polyethylene is 25dl / g, and after swelling with kerosene, it is extruded with a twin-screw extruder, sprayed through a spinneret, and passed through a spinneret. The hot air circulation system desolventizes, the temperature in the front area of ​​the nitrogen flow is 110 ° C, and the temperature in the middle and rear area is 70 ~ 100 ° C and gradually decreases. 135 ultra-high molecular weight polyethylene staple fibers of 1500D / 1380f are assembled into a large tow of 200,000 deniers. The crimping wheel width per mm bears 5,000 dtex, and the bundle tension is 0.08cN / dtex. The large tow is washed Wash off the filament oil in the oil tank, then immerse in the oil tank for oiling, control the oil content to 0.2%, send it into the stuffing extrusion crimping tank through the feeding wheel of the crimper for crimping, the tension of the crimped tow is 0....

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Abstract

The invention discloses ultrahigh molecular weight polyethylene short fiber and a preparation method thereof. The preparation method includes: preparing protofilament of the ultrahigh molecular weight polyethylene short fiber, subjecting the protofilament to assembly winding and bundling, and cleaning oil on the protofilament; applying anionic high-strength polyethylene short fiber oil, performing cold crimping, and loosening and setting the crimped fiber at 80-120 DEG C, wherein drying time is 5-30min, and drying thermosetting temperature is 90-100 DEG C; adjusting tension, and cutting to obtain ultrahigh molecular weight polyethylene short fiber of 3-10 / 25mm in crimp number, wherein cutting length is 3-102mm. The section of the ultrahigh molecular weight polyethylene short fiber is special-shaped, the short fiber has certain natural crimping characteristic and is easy to comb and glue, and cohesion, spinnability and blending performance of the short fiber are improved; fiber number of the short fiber is 0.5-2.5dtex, cutting length is 3-102mm, and strength is 10-40cN / dtex, so that requirements on different styles of subsequent spinning processes can be met.

Description

technical field [0001] The invention relates to the technical field of synthetic fiber production, in particular to a method for manufacturing polyethylene short fibers. Background technique [0002] Ultra-high molecular weight polyethylene fiber (also known as high-performance polyethylene fiber, high-strength polyethylene fiber) has excellent comprehensive properties and is widely used in safety protection, military, aerospace, marine, sports and other fields. At present, it is mainly filament Products, such as various types of ropes, UD cloth, etc. High-strength polyethylene staple fibers are different from filaments. First, the style of the back fabric is different. The spinning products of staple fibers are denser, softer, and have better fabric adhesion (non-slip), and can be made into wearable fabrics. More comfortable, wear-resistant, cut-resistant and stab-resistant high-end denim clothing, outdoor sportswear and other functional clothing fabrics; second, short fib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/04D01F6/30D01D10/02D02G1/12D02G1/20D01G1/04
Inventor 陈建军杨勇阮洋郭团春陈国斌张其宝何庆权胡婷
Owner SINOPEC YIZHENG CHEM FIBER
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