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A method and fiber for preparing ultra-high molecular weight polyethylene fiber

An ultra-high molecular weight, polyethylene fiber technology, applied in the direction of single-component polyolefin rayon filament, fiber processing, complete sets of equipment for the production of rayon, etc., can solve problems affecting fiber quality and production efficiency, adverse solvent diffusion and volatilization, Increase the cost of solvent recovery and other issues, to achieve the effect of reducing the production rate of filaments and the rate of broken ends, low cost, and enhanced cohesion ability

Active Publication Date: 2016-08-24
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some air-gap sections play a role of slow cooling to protect the spinneret surface from the blowing, but it is not conducive to the diffusion and volatilization of solvents, thereby increasing the cost of solvent recovery; some air-gap sections play a role in the drafting process, thereby It is easy to cause drafting in the spinneret, resulting in uneven fiber dryness and easy breakage on the spinneret surface, affecting the final quality and production efficiency of the fiber

Method used

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  • A method and fiber for preparing ultra-high molecular weight polyethylene fiber
  • A method and fiber for preparing ultra-high molecular weight polyethylene fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 7% (mass percentage) of ultra-high molecular weight polyethylene (viscosity-average molecular weight 6,000,000) decahydronaphthalene solution is extruded through the spinneret in the spinning box, and through the gas phase section, the spinneret plate surface area is 50.24cm 2 , the cross-sectional area of ​​the gas-phase section is 1.1 times the area of ​​the spinneret plate, the length of the gas-phase section is 0.2 of the cross-sectional width of the sealing cover, that is, 17mm, nitrogen enters through the air inlet, and the temperature in the sealing cover is 99 ° C, nitrogen and flash The steamed decahydronaphthalene is drawn out from the air suction port, and the fine spinning flow enters the box containing pure water at 10°C. The tensile stress is 8kPa. The spun filaments pass through five sets of pressing rollers. The force exerted by each set of pressing rollers on the spun filaments is 0.5MPa. The bonding rate of the filaments is 5%. Winding, and finally pos...

Embodiment 2

[0063] 7% (mass percentage) of ultra-high molecular weight polyethylene (viscosity-average molecular weight 6,000,000) decahydronaphthalene solution is extruded through the spinneret in the spinning box, and through the gas phase section, the spinneret plate surface area is 50.24cm 2 , the cross-sectional area of ​​the gas-phase section is twice the area of ​​the spinneret plate, the length of the gas-phase section is 0.8 of the cross-sectional width of the sealing cover, that is, 91mm, nitrogen enters through the air inlet, and the temperature in the sealing cover is 150 ° C. The steamed decahydronaphthalene was drawn out from the air suction port, and the other processes were the same as in Example 1. The final fiber performance indicators obtained by post-spinning and drawing are shown in Table 1.

Embodiment 3

[0065] 7% (mass percentage) of ultra-high molecular weight polyethylene (viscosity average molecular weight 6 million) decahydronaphthalene solution is extruded through the spinneret in the spinning box body, and through the gas phase section, the spinneret plate surface area is 200.96cm 2 , the cross-sectional area of ​​the gas phase section is 4 times the area of ​​the spinneret plate, the length of the gas phase section is 1 time the cross-sectional width of the sealing cover, that is, 320mm, nitrogen enters through the air inlet, the temperature in the sealing cover is 220 ° C, nitrogen and The flash evaporated decahydronaphthalene is drawn out from the air suction port, and the spinning fine stream enters the box containing -10°C decahydronaphthalene. The other processes are the same as in Example 1. The final fiber performance indicators obtained after post-spinning and drafting are shown in Table 1.

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Abstract

A method for preparing ultra-high-molecular-weight polyethylene fibers, comprising: extruding ultra-high-molecular-weight polyethylene decahydronaphthalene solution through a spinneret to form a fine spinning stream, and the fine spinning stream passes through a gas phase section, a liquid phase section, and a physical Extrusion section, dry hot box section, etc. to obtain the raw silk, and at the same time ensure that the spinning filaments from the liquid phase section have tensile stress, and then carry out high-power thermal stretching on the raw silk to obtain ultra-fine filaments with a single fiber fineness lower than 0.3dtex High molecular weight polyethylene fibers. The breaking strength of the fiber bundle is not less than 40cN·dtex ‑1 , modulus not less than 2000cN·dtex ‑1 . The method of the invention has the characteristics of reduced production energy consumption, energy saving and emission reduction, low production cost and the like, and the prepared ultra-high molecular weight polyethylene fiber has excellent quality. The ultra-high molecular weight polyethylene fiber is used to prepare public safety protection products, labor insurance products, and medical materials, such as bullet-proof and stab-proof clothing, explosion-proof blankets, explosion-proof tanks, anti-puncture shoes and soles, and surgical sutures.

Description

technical field [0001] The invention relates to a preparation method of high-performance fiber, more specifically, to a preparation method of ultra-high molecular weight polyethylene fiber and the fiber. It belongs to the textile field. Background technique [0002] Ultra-high molecular weight polyethylene fiber is currently the fiber material with the highest strength-to-mass ratio. It has high strength and high modulus, light weight (density less than 1), high energy absorption, chemical stability, water resistance, light resistance, fatigue resistance, wear resistance, and bending resistance. , low temperature resistance, easy transmission of radio waves and other excellent characteristics, together with carbon fiber and aramid fiber, are known as the three high-performance fibers. Due to the above special properties, ultra-high molecular weight polyethylene fibers can be used in the preparation of labor insurance products, public safety protection products, and medical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/04D01D10/00D01D10/06D01D5/00D01D13/02
Inventor 李方全孙玉山孔令熙段先泉
Owner CHINESE TEXTILE ACAD
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