Preparation method of high-strength high-modulus polyethylene fiber

A polyethylene fiber, high-strength and high-modulus technology, used in fiber processing, single-component polyolefin rayon, melt spinning, etc., can solve the problems of environmental pollution, production cost, molecular weight reduction, low screw efficiency, etc. The effect of production efficiency and single machine output, reducing molecular weight reduction and improving efficiency

Inactive Publication Date: 2010-07-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problems of severe molecular weight reduction and low screw efficiency in the spinning process of high-strength and high-modulus

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] UHMWPE powder: molecular weight 1.5 million, average particle size 10 μm; solvent: kerosene; antioxidant 300 (polyethylene powder, solvent and antioxidant are 10:100:0.5 by mass percentage); polymer powder, solvent Mix with antioxidant in the dissolution kettle and heat and stir. The temperature in the kettle starts at 50°C, then gradually rises to 170°C, and stirs and dissolves in the dissolution kettle for 50 minutes; the dissolved UHMWPE is naturally cooled to 10°C and then mechanically pulverized. Mechanical crushing shear rate: 1500S - 1. The average diameter of the obtained pellets is 30 mm; the rotational speed of the mechanical centrifuge: 100 rpm; the deoiling time: 120 minutes. The solid content of the spinning raw material was measured to be 31.2 wt%. The obtained spinning pellets are subjected to screw melt spinning; screw melt spinning temperature, feeding zone: 70°C, preheating zone: 145°C, melting zone: 180°C, compression zone: 185°C, metering zone: 180°...

Embodiment 2

[0034] UHMWPE powder: molecular weight 2.5 million, average particle size 200 μm; solvent: mineral oil; antioxidant 330 (polyethylene powder, solvent and antioxidant are 4: 100: 0.08 by mass percentage); polymer powder, Solvent and antioxidant are mixed in the dissolution kettle and heated and stirred. The temperature in the kettle is 50°C at the beginning, and then gradually rises to 180°C and stirred and dissolved in the dissolution kettle for 120 minutes; the dissolved UHMWPE is naturally cooled to 20°C and then mechanically pulverized. Mechanical crushing shear rate: 100S -1 , the average diameter of the pellets was 20mm; the mechanical centrifuge speed: 3000 rpm; the deoiling time: 50 minutes; the solid content of the spinning raw material was 30.3wt%. The obtained spinning pellets are subjected to screw melt spinning; screw melt spinning temperature, feeding zone: 120°C, preheating zone: 145°C, melting zone: 180°C, compression zone: 185°C, metering zone: 180°C; Spinning...

Embodiment 3

[0036] UHMWPE powder: molecular weight 4.5 million, average particle size 100 μm; solvent: white oil; antioxidant 1010 (polyethylene powder, solvent and antioxidant are 3: 100: 0.09 by mass percentage); polymer powder, Solvent and antioxidant are mixed in the dissolution kettle and heated and stirred. The temperature in the kettle starts at 50°C, and then gradually rises to 180°C. Stir and dissolve in the dissolution kettle for 150 minutes; the dissolved UHMWPE is naturally cooled to 30°C and then mechanically pulverized , mechanical crushing shear rate: 3000S -1 , the average diameter of the pellets was 18mm; the mechanical centrifuge speed: 3500 rpm; the deoiling time: 80 minutes. The solid content of the spinning raw material was measured to be 35.6 wt%. The obtained spinning pellets are subjected to screw melt spinning; screw melt spinning temperature, feeding zone: 155°C, preheating zone: 175°C, melting zone: 200°C, compression zone: 210°C, metering zone: 220°C; Spinnin...

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Abstract

The invention relates to a preparation method of a high-strength high-modulus polyethylene fiber, which comprises the following steps: ultra high molecular weight polyethylene powder with the molecular weight of 1.5 to 8 million is mixed with a solvent according to a mass ratio of 1 to 10: 100 and is mixed with an anti-oxygen agent to be hated and mixed in a mixing tank, the quantity of the anti-oxygen agent is 2 to 5 percent of the solute mass, the heating temperature is 100 to 200 DEG C, the powder is adequately dissolved to obtain the ultra high molecular weight polyethylene solution, the ultra high molecular weight polyethylene is naturally cooled to form gel blocks, the gel blocks are taken out to be smashed into particle powder with partial solvent is removed so as to obtain a ultra high molecular weight polyethylene spinning raw material with the solid content of 20 to 70 percent by weight, the prepared ultra high molecular weight polyethylene spinning raw material is inputted to a screw to be melt and to extrude filature, and the filature is pre-stretched and coiled, and then is leached, dried and hot stretched to obtain the high-strength high-modulus polyethylene fiber with the fracture strength of 20 to 50 cN/dtex and the modulus of 450 to 1250 cN/dtex. The preparation method solves the problems of the prior art that the molecular weight is seriously reduced and the efficiency of the screw is low during the spinning process of the high-strength high-modulus polyethylene fiber, and overcomes the weaknesses of the prior art that the toxicity is serious, the environment is polluted and the production cost is high.

Description

technical field [0001] The invention relates to a preparation method of high-strength and high-modulus polyethylene fiber, in particular to a preparation method of high-strength and high-modulus polyethylene fiber which combines gel spinning and melt spinning processes. Background technique [0002] Ultra-high molecular weight polyethylene fiber (UHMWPE Fiber) is a high-strength, high-modulus high-performance fiber made from powdered ultra-high molecular weight polyethylene with a molecular weight of more than 1 million, and made by gel spinning. Because of its high orientation of macromolecules and high crystallinity of extended chains, it has super high strength and modulus, and also has excellent properties such as light weight, UV resistance, impact resistance, and seawater corrosion resistance. It is juxtaposed with carbon fiber and aramid fiber. It is one of the three high-performance fibers in the world today. UHMWPE fibers can be used to make bulletproof and stab-re...

Claims

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Application Information

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IPC IPC(8): D01D5/10D01D1/00D01F6/46
Inventor 王依民彭刚王琳文珍稀倪建华王燕萍
Owner DONGHUA UNIV
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