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High-performance polyethylene fiber preparation method and fiber

A polyethylene fiber, high-performance technology, applied in the textile field, can solve the problems of affecting fiber performance indicators, cumbersome and discontinuous processes, reducing fiber quality, etc., to simplify production steps and equipment investment, reduce solvent residues, and improve performance. Effect

Active Publication Date: 2017-04-05
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole preparation process is divided into pre-spinning and post-spinning, the process is cumbersome and discontinuous, and the energy consumption is high, the production efficiency is low, and the cost is high; moreover, like the Chinese patent ZL01123737.6, the liquid fine stream extruded from the spinneret Surrounded by a thick layer of volatile solvents, it is not easy to dry, and it is easy to appear wool when stretched, which affects the final performance index of the fiber and reduces the quality of the fiber

Method used

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  • High-performance polyethylene fiber preparation method and fiber
  • High-performance polyethylene fiber preparation method and fiber
  • High-performance polyethylene fiber preparation method and fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Polyethylene with a molecular weight of 6.5 million is added to decahydronaphthalene for mixing and swelling, wherein the concentration of polyethylene in decahydronaphthalene is 6% according to mass percentage, and then injected into a twin-screw extruder for dissolution, the obtained The decahydronaphthalene solution of polyethylene is extruded at a speed of 1 m / min from a spinneret hole with an aperture of 0.7 mm and an aspect ratio of 7 to form a fine spinning stream;

[0035] (2) The fine spun stream is stretched through the spinneret, cooled and solidified by water, and then wound onto the first drafting roll whose surface temperature is 40°C, and the pressure roller on the first drafting roller squeezes the spun stream The solvent is removed by pressure, and the fine spinning flow passes through a drafting water tank with a stroke length of 10m and a water bath temperature of 80°C for water bath stretching, and then passes through an oven with a stroke length ...

Embodiment 2

[0039] (1) Polyethylene with a molecular weight of 4.5 million is added to decahydronaphthalene for mixing and swelling, wherein the concentration of polyethylene in decahydronaphthalene is 9% according to mass percentage, and then injected into a twin-screw extruder for dissolution, the obtained The decahydronaphthalene solution of polyethylene is extruded at a speed of 2 m / min from a spinneret hole with an aperture of 1 mm and an aspect ratio of 6 to form a fine spinning stream;

[0040] (2) The fine spun stream is stretched through the spinneret, cooled and solidified by water, and wound onto the first drafting roll whose surface temperature is 80°C, and the pressing roller on the first drafting roller squeezes the spun stream The solvent is removed by pressure, and the fine spinning flow is stretched in a drawing water tank with a stroke length of 4m and a water bath temperature of 99°C, and then dried and stretched in an oven with a stroke length of 50m and a temperature o...

Embodiment 3

[0044] (1) Polyethylene with a molecular weight of 1,000,000 is added to decahydronaphthalene for mixing and swelling, wherein the concentration of polyethylene in decahydronaphthalene is 25% according to mass percentage, and then injected into a twin-screw extruder for dissolution, the obtained The decahydronaphthalene solution of polyethylene is extruded at a speed of 0.5 m / min from a spinneret hole with an aperture of 0.5 mm and an aspect ratio of 20 to form a fine spinning stream;

[0045] (2) The fine spun stream is stretched through the spinneret, cooled and solidified by water, and then wound onto the first drafting roll whose surface temperature is 15°C, and the pressure roller on the first drafting roller squeezes the spun stream The solvent is removed by pressure, and the fine spinning flow is stretched in a drawing water tank with a stroke length of 20m and a water bath temperature of 90°C, and then dried and stretched in an oven with a stroke length of 8m and a temp...

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Abstract

The invention belongs to technical field of weaving, and specifically relates to a high-performance polyethylene fiber preparation method and a fiber. The high-performance polyethylene fiber preparation method comprises following steps of (1) extruding polyethylene decahydronaphthalene solution from a spinneret hole to form a spinning trickle; and (2) carrying out spinning nozzle extension, cooling and solidification, desolventizing, water-bath stretching, hot stretching and winding formation to the spinning trickle to obtain a high-performance polyethylene fiber. The solvent residual quantity of the obtained fiber is lower than 100 ppm, the diameter of each fiber monofilament is lower than 30 [mu]m, and the cross section of the fiber is intermediately-recessed. According to the invention, a one-step production process is employed, production steps are simplified, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of textiles, and in particular relates to a preparation method of high-performance polyethylene fiber and the fiber. Background technique [0002] Polyethylene fiber has received more and more attention due to its excellent characteristics such as high strength and initial modulus, good friction resistance, low density, strong wicking ability, and good chemical corrosion resistance. In recent years, high-performance polyethylene fiber has made great progress in both spinning technology and market application. [0003] The Chinese patent with the application number 01123737.6 discloses a manufacturing method of high-strength polyethylene fiber, using semi-closed temperature control zone and matching parameters such as molecular weight, stock solution concentration, spinneret hole diameter, aspect ratio and extrusion rate, etc. By adjusting the longitudinal tensile rheology of the spinning dope or spinning solution aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D13/00D01D5/14D01D10/02D01F6/04
CPCD01D5/14D01D10/02D01D13/00D01F6/04
Inventor 李方全谢璨王万杰孙玉山孔令熙
Owner CHINESE TEXTILE ACAD
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