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Preparation method of ultrahigh molecular weight polyethylene monofilament

A technology of ultra-high molecular weight and polyethylene, which is applied in the direction of single-component polyolefin rayon, rayon manufacturing, and melting of filament raw materials, which can solve high production costs, insufficient solution concentration, production efficiency, and production costs. There are problems in environmental protection, etc., to achieve good uniformity, solve the difficulty of chimeric rearrangement, and environmental friendliness

Inactive Publication Date: 2019-03-19
郭海洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even with a good solvent such as decahydronaphthalene, the concentration of the solution is still not high enough, resulting in extremely high production costs, and it takes a lot of energy or a low-boiling second solvent (extractant) to remove the first solvent
It is problematic in terms of production efficiency, production cost and environmental protection.

Method used

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  • Preparation method of ultrahigh molecular weight polyethylene monofilament
  • Preparation method of ultrahigh molecular weight polyethylene monofilament

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The composite modified material containing 98% polyethylene with a weight average molecular weight of 1 million is added to a 30MPa ultra-high pressure co-rotating conical twin-screw extruder for full mixing and melting. The working temperature of the twin-screw extruder is 230 ℃. Then, the above-mentioned molten material is further increased to 55MPa through the booster pump, and the working temperature is 250°C. At the same time, the melt is metered and output, and the molten material is quantitatively pressed into the spinning die or spinning box for extrusion. For spinning, the temperature of the spinning box is 265°C. Then cool in a hot water bath at 80°C to obtain the primary monofilament; then carry out secondary stretching with hot air at 90°C, the stretching ratio is 10, and finally go through 130°C heat setting, oiling, winding and other processes to obtain a diameter of 0.12mm , UHMWPE monofilament with tensile strength of 8.1cN / dtex and elongation of 15%. ...

Embodiment 2

[0031]The composite modified material containing 94% polyethylene with a weight average molecular weight of 2 million is added to a 35MPa ultra-high pressure co-rotating twin-screw extruder for full mixing and melting. The working temperature of the twin-screw extruder is 240 ℃. Then, the above-mentioned molten material is further increased to 60MPa through the booster pump, and the working temperature is 255°C. At the same time, the melt is metered and output, and the molten material is quantitatively pressed into the spinning die or spinning box for extrusion. For spinning, the temperature of the spinning box is 268°C. Then cool in a hot oil bath at 120°C to obtain the primary monofilament; then carry out three-stage hot air stretching at 90°C, with a draw ratio of 15, and finally go through 130°C heat setting, oiling, winding and other processes to obtain a diameter of 0.25mm , UHMWPE monofilament with tensile strength of 8.7cN / dtex and elongation of 17.6%.

Embodiment 3

[0033] The composite modified material containing 92% polyethylene with a weight average molecular weight of 2.5 million is added to a 42MPa ultra-high pressure co-rotating conical twin-screw extruder for full mixing and melting. The working temperature of the twin-screw extruder is 255 ℃. Then the above-mentioned molten material is further increased to 65MPa through the booster pump, and the working temperature is 260°C, and the melt is metered and output at the same time, and the molten material is quantitatively pressed into the spinning die or spinning box for extrusion For spinning, the temperature of the spinning box is 270°C. Then cool in a hot water bath at 90°C to obtain primary monofilament; then carry out hot air four-stage stretching at 100°C, with a draw ratio of 20, and finally undergo heat setting at 150°C, oiling, winding and other processes to obtain a diameter of 0.30mm , UHMWPE monofilament with tensile strength of 9.2cN / dtex and elongation of 20%.

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Abstract

The invention discloses a preparation method of an ultrahigh molecular weight polyethylene monofilament. The preparation method comprises the following steps that an ultrahigh molecular weight polyethylene composite agent obtained through melting and kneading treatment is adopted, a special screw extruding device is adopted for performing sufficient melting and mixing on the composite agent, and extrusion and conveying are performed; furthermore, a booster pump is adopted for improving pressure of a fusion system, meanwhile, a melt is quantitively pressed into a spinning die head or a spinningbox to perform extrusion spinneret, after water bath or oil bath or air bath cooling is performed, primary monofilaments are obtained, the obtained primary monofilaments are subjected to doffing, after multi-heating stretching is performed, the primary monofilaments can be directly and continuously subjected to water bath drafting, multi-stage heat roller drafting and hot air stretching and thensubjected to thermal treatment, and oiling is performed to obtain the high-strength high-modulus polyethylene monofilaments. The problems that molecules are nested and arranged difficultly, and macromolecule winding is series, so that melt flowability and uniformity are poor are well solved, and the monofilaments are high in strength, good in uniformity, simple in production technology, high in efficiency and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of polymer fiber materials, in particular to a preparation method of ultra-high molecular weight polyethylene monofilament. Background technique [0002] Since the Dutch DSM company successfully developed ultra-high molecular weight polyethylene fiber in the late 1980s, it has become the next carbon fiber, aramid fiber (Kevlar) with its high strength, high modulus, and excellent impact resistance, wear resistance and weather resistance. The third generation of high-performance fibers after fibers. In recent years, the application prospect of ultra-high molecular weight polyethylene fiber has attracted much attention, and it is widely used in agricultural machinery, personal protection, ocean fishery, military, aerospace and other fields. [0003] The research on UHMW~PE fiber in my country began in the 1980s, and some scientific research units such as Donghua University (China Textile University), China Tex...

Claims

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Application Information

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IPC IPC(8): D01D5/08D01D5/14D01D10/02D01D1/04D01D1/09D01F6/46D01F1/10
CPCD01D1/04D01D1/09D01D5/08D01D5/14D01D10/02D01F1/10D01F6/46
Inventor 郭海洋赵卫哲邓佳倪建华王依民肖峰
Owner 郭海洋
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