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Preparation method of high modulus polyethylene fiber

A high-modulus polyethylene and polyethylene technology, which is applied in fiber processing, fiber chemical characteristics, spinning solution preparation, etc., can solve the problems of unguaranteed solid raw fiber quality, increase production cost, and affect fiber performance, etc. To achieve the effect of reducing the demand for nitrogen production equipment, avoiding splicing, and feeling soft

Inactive Publication Date: 2014-04-30
JIANGSU SHENTAI SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem is that inert gas protection is required, which increases the production cost; moreover, the fibrillated ultrafine mesh fiber structure is not fixed by rapid cooling, and the quality of the solid precursor cannot be guaranteed, thus affecting the final performance of the fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The molecular weight of 5 mass parts is the ultra-high molecular weight polyethylene of 4.8 million, the molecular weight of 0.5 mass parts is the low density polyethylene of 100,000 and the spinning aid (antioxidant 1010) of 0.01 mass part, add 100 mass parts of Mix and swell in the organic solvent (decalin), stir while swelling, the stirring rate is 30 rpm, after 1 hour of high temperature swelling at 100 ° C, the formed polyethylene organic solution is fully dissolved by the twin-screw extruder, Extruded from the spinneret, the extruded jelly fiber enters a 1.2m long, 135°C flash heating zone heated by water vapor, so that the jelly fiber is in direct contact with water vapor, and about 70% of the jelly fiber The organic solvent is flashed quickly, and the flashed organic solvent leaves the surface of the jelly fiber quickly to form a solid protofilament with a fibrillated ultrafine network fiber structure; 65 times thermal drawing under steam heating at ℃, the high ...

Embodiment 2

[0020]The molecular weight of 7 mass parts is the ultra-high molecular weight polyethylene of 4.5 million, the molecular weight of 1 mass part is the low density polyethylene of 200,000 and the spinning aid (antioxidant 225) of 0.02 mass part, add 100 mass parts of Mix and swell in an organic solvent (ethylene glycol), stir while swelling, the stirring rate is 30 rpm, after 1 hour of high temperature swelling at 125 ° C, the formed polyethylene organic solution is fully dissolved by a twin-screw extruder, Extruded from the spinneret, the extruded jelly fiber enters a 2m-long, 150°C flash heating zone heated by water vapor, so that the jelly fiber is in direct contact with water vapor, and about 80% of the organic matter in the jelly fiber The solvent is flashed quickly, and the flashed organic solvent leaves the surface of the jelly fiber quickly to form a solid protofilament with a fibrillated ultrafine network fiber structure; The high modulus polyethylene fiber with a stren...

Embodiment 3

[0022] The molecular weight of 8 mass parts is the ultrahigh molecular weight polyethylene of 4 million, the molecular weight of 2 mass parts is the low density polyethylene of 300,000 and the spinning aid (antioxidant 168) of 0.03 mass part, add 100 mass parts of Mix and swell in an organic solvent (the mass mixing ratio of decahydronaphthalene and ethylene glycol is 1:1), stir while swelling, at a stirring rate of 60 rpm, and swell at a high temperature of 100°C for 2 hours to form polyethylene After the organic solution is fully dissolved by the twin-screw extruder, it is extruded from the spinneret, and the extruded jelly fiber enters a 3m-long, 190°C flash heating zone heated by water vapor, so that the jelly fiber and water vapor directly Contact, about 90% of the organic solvent in the jelly fiber is quickly flashed, and the organic solvent that is flashed out quickly leaves the surface of the jelly fiber to form a solid precursor of fibrillation ultrafine network fiber ...

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Abstract

The invention provides a preparation method of a high modulus polyethylene fiber. The preparation method is characterized by mixing and swelling 5-10 parts by mass of ultra-high molecular weight polyethylene, 0.5-5 parts by mass of low density polyethylene, 0.01-0.04 part by mass of spinning aid and 100 parts by mass of organic solvent; after a formed polyethylene organic solution is fully dissolved by a double-screw extruder, enabling a gel fiber extruded by a spinneret plate to enter a flash evaporation heating zone heated by water vapor, and carrying out quick flash evaporation on the organic solvent in the gel fiber to form a solid protofilament; after shock cooling of the solid protofilament in a water bath, carrying out hot stretching by heating with water vapor more than 60 times, thus preparing the high modulus polyethylene fiber in a fibrillated net structure. The preparation method has the beneficial effects that a proper amount of low density polyethylene is added, the solid protofilament is subjected to shock cooling in the water bath, and meanwhile, the water vapor is used as a heating and protecting medium to shorten the preparation cycle, thus reducing the production cost and improving the fiber quality.

Description

technical field [0001] The invention relates to a preparation method of high modulus polyethylene fiber. Background technique [0002] High modulus polyethylene fiber has excellent properties such as light weight, high strength, non-water absorption, excellent wear resistance, outstanding impact resistance, good low temperature creep resistance, and excellent chemical corrosion resistance. One of the three high-performance fiber materials. It has extremely broad application prospects in the field of low temperature and normal temperature, and has strong market development potential in national defense and industrial and agricultural production. [0003] At present, the preparation methods of high modulus polyethylene fibers are mainly wet spinning method and dry spinning method. [0004] The wet spinning method is to use a low-volatile solvent to prepare polyethylene spinning stock solution. The spinning stock solution is extruded from the spinneret hole and enters a water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/10D01D5/11D01D1/02D01D10/00
Inventor 郭子贤王新鹏
Owner JIANGSU SHENTAI SCI & TECH DEV
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