Extraction process for ultrahigh molecular weight polyethylene fibre

Abstract

The invention relates to an extraction process for an ultrahigh molecular weight polyethylene fibre. The extraction process adopts multilevel continuous extraction technology and three-dimensional ultrasonic vibration extraction accelerating technology; and an extracting agent is a compounded alkane extracting agent. Compared with the prior art, the extraction process adopts the novel compounded alkane extracting agent and the three-dimensional ultrasonic vibration extraction accelerating technology, adopts multilevel continuous extraction, utilizes the gradient distribution of the solvent content in the extracting agent to form a set of the high-efficiency extraction process, improves the extracting speed, effectively reduces the residual content of the solvent in fibre yarn, establishes a good foundation for improving the drawing speed in the drawing procedure and the product quality, and can obtain the high-strength (more than 35 g / d) ultrahigh molecular weight polyethylene fibre.

Description

technical field [0001] The invention relates to ultra-high molecular weight polyethylene fibers, in particular to an extraction process for ultra-high molecular weight polyethylene fibers. Background technique [0002] With the progress of mankind and the rapid development of science and technology in recent years, the demand for special fibers from all walks of life is increasing day by day. After carbon fiber and aramid fiber, ultra-high molecular weight polyethylene fiber (UHMWPE) has attracted much attention due to its excellent performance and broad application prospects, and has made great progress in recent years. Ultra-high molecular weight polyethylene fiber has high strength, high modulus and excellent impact resistance, wear resistance and weather resistance, so it is widely used in military engineering, aerospace engineering, infrastructure engineering, agricultural machinery, ship cables, entertainment, etc. fields, and its scope of application is becoming wide...

AI Technical Summary

Problems solved by technology

[0003] Manufacturing ultra-high molecular weight polyethylene fibers is a complex technical work. The molecular weight of polyethylene used to manufacture ultra-high molecular weight polyethylene fibers can be as high as 2 million to 5 million or even higher. The macromolecular chains are in a highly entangled state, making processing difficult. It is very large, and it is more difficult to produce high-quality fiber filaments. There is no ready-made mature technology available in China

[0004] At present, high-strength and high-modulus ultra-high molecular weight polyethylene fibers are all short-segment fibers, and the lengths vary, so the production length cannot be guaranteed. The application of short-length fibers is limited to the manufacture of bulletproof products, etc. When manufacturing rope products and fabrics, There will be problems of poor production continuity and a lot of waste

At the same time, the existing ultra-high molecular weight polyethylene fiber production process has problems such as long lines, intermittent operations in some processes, complex and difficult to control processes, high broken wire rate, low production efficiency, high energy consumption, and difficult to control product quality. The production and application of ultra-high molecular weight polyethylene fiber