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Melt spinning preparation method of high molecular weight polyethylene fiber

A polyethylene fiber, high molecular weight technology, used in melt spinning, single-component polyolefin rayon, stretch spinning, etc., can solve the problems of low melt flow rate, difficult preparation, and high melt viscosity , to achieve the effect of improving melt flow properties, increasing production rate and high stiffness

Active Publication Date: 2018-09-28
山东莱威新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a high molecular weight polyethylene fiber melt spinning preparation method, which has the advantages of significantly improving melt flow performance, significantly increasing production rate and reducing recycling costs, and solves the problem of preparing high molecular weight polyethylene fibers. High-molecular-weight polyethylene, the main raw material of ethylene fiber, has extremely high melt viscosity and extremely low melt flow rate due to highly entangled molecular chains, which lead to extremely difficult technical problems in preparation

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  • Melt spinning preparation method of high molecular weight polyethylene fiber
  • Melt spinning preparation method of high molecular weight polyethylene fiber

Examples

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Effect test

Embodiment 1

[0034] (1) Add 5 parts by mass of kaolin raw ore and 100 parts by mass of deionized water into the mixing tank. After fully stirring, let it stand for 10 minutes, siphon out the suspension in the upper 40mm part, and then add and suck out the suspension in the mixing tank deionized water equal to the volume of the liquid, then stirred, settled and extracted, and repeated several times until the suspension within the upper 40 mm of the mixing barrel was no longer turbid after adding deionized water and stirring for 10 minutes, and filtered the obtained kaolin slurry , drying to obtain purified kaolin;

[0035] (2) Add 3 parts by mass of the purified kaolin prepared in step (1) and 20 parts by mass of deionized water into an electric mixer, and stir and disperse with an electric mixer for 2 hours at room temperature, and mix 5 parts by mass of Add sodium hydroxide solution with a fraction of 4% into the electric stirrer, continue to stir for 2 hours at room temperature, then cen...

Embodiment 2

[0045] (1) Add 8 parts by mass of kaolin raw ore and 150 parts by mass of deionized water into the mixing tank. After fully stirring, let it stand for 20 minutes, siphon out the suspension in the upper 75mm part, and then add and suck out the suspension in the mixing tank deionized water equal to the volume of the liquid, then stirred, settled and extracted, and repeated several times until the suspension within the upper 75 mm of the mixing barrel was no longer turbid after adding deionized water and stirring for 20 minutes, and filtered the obtained kaolin slurry , drying to obtain purified kaolin;

[0046] (2) Add 5 parts by mass of the purified kaolin prepared in step (1) and 30 parts by mass of deionized water into an electric stirrer, stir and disperse for 4 hours with an electric stirrer at room temperature, and mix 8 parts by mass of Add sodium hydroxide solution with a fraction of 4% into the electric stirrer, continue to stir for 3 hours at room temperature, then cen...

Embodiment 3

[0056] (1) Put 10 parts by mass of kaolin raw ore and 200 parts by mass of deionized water into the mixing tank. After fully stirring, let it stand for 30 minutes, siphon out the suspension in the upper 100mm part, and then add and suck out the suspension in the mixing tank Deionized water equal to the volume of the liquid, then stirred, settled and extracted, and repeated several times until the suspension within the upper 100 mm of the mixing barrel was no longer turbid after adding deionized water and stirring for 30 minutes, then filtered the obtained kaolin slurry , drying to obtain purified kaolin;

[0057] (2) Add 7.5 parts by mass of the purified kaolin prepared in step (1) and 50 parts by mass of deionized water into an electric mixer, and stir and disperse for 5 hours with an electric stirrer at room temperature, and mix 10 parts by mass of Add sodium hydroxide solution with a fraction of 4% into the electric stirrer, continue to stir for 4 hours at room temperature,...

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Abstract

The invention discloses a melt spinning preparation method of a high molecular weight polyethylene fiber. The preparation method comprises the following steps: purifying and modifying kaoline, grinding the purified and modified kaoline to 200 meshes, performing ion exchange on the micron-sized kaoline through a cationic monomer, namely methacryloyloxyethyl trimethyl ammonium chloride to form organic kaoline, blending with initiators, namely dibenzoyl peroxide and high molecular weight polyethylene, performing granulation in an auxiliary granulation machinery to form a modified high molecular weight polyethylene grain, performing melt extrusion on the modified high molecular weight polyethylene grain in a screw extruder to form a nascent fiber, performing hot stretching on the nascent fiberafter cooling and drying, and performing thermoforming, curling and false twisting after the stretching to form the high molecular weight polyethylene fiber. The method has the technical advantages that a melt flowing property is significantly improved, a production rate is significantly increased, and the recovery cost is lowered.

Description

technical field [0001] The invention relates to the technical field of high molecular weight polyethylene fiber preparation, in particular to a method for preparing high molecular weight polyethylene fiber by melt spinning. Background technique [0002] High-molecular-weight polyethylene fiber is a high-performance fiber that was successfully developed in the late 1970s and entered industrialization in the early 1980s. Together with carbon fiber and aramid fiber, it is also known as the world's three major high-tech fibers. [0003] The methods for preparing high-molecular-weight polyethylene fibers include melt-spinning preparation methods, solid-state extrusion methods, surface crystal growth methods, and gel spinning methods. Compared with other preparation methods, the melt-spinning preparation method does not need to recover solvents and is more environmentally friendly. Technical advantages. [0004] However, high molecular weight polyethylene as a raw material for pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/10D01D5/08D01D5/12
CPCD01D5/08D01D5/12D01F1/10D01F6/46
Inventor 秦法伟
Owner 山东莱威新材料有限公司
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