Ultra-high-molecular-weight polyethylene material capable of continuously separating out lubricant on surface and preparation method of material

Abstract

The invention relates to an ultra-high-molecular-weight polyethylene material capable of continuously separating out a lubricant on the surface and a preparation method of the material, and belongs tothe technical field of ultra-high-molecular-weight polyethylene modification. The ultrahigh molecular weight polyethylene material comprises a main material and an auxiliary material, and the main material is ultra-high-molecular-weight polyethylene, wherein the weight percentage of the main material is 80-92%, the weight percentage of the auxiliary material is 8-20%, and the sum of the weight percentage of the main material and the auxiliary agent is 100%; the auxiliary agent comprises a lubricant, a releasing agent and an antioxidant, wherein the weight percentages of the lubricant, the releasing agent and the antioxidant on the total weight of the raw materials are as the follows: 7-18% of the lubricant, 0.4-1.2% of the releasing agent and 0.6-0.8% of the antioxidant. The auxiliary agent comprises the lubricant and the releasing agent, raw material preparation and hot-press molding are carried out, material modification is carried out, and a lubricant which can be continuously separated out on the surface of the material after the material is formed is added, so that the self-lubricating property of the prepared ultra-high-molecular-weight polyethylene material is greatly enhanced, the static friction coefficient is increased from 0.12 to 0.08, and the service life is prolonged by 8% or above.

Description

technical field [0001] The invention belongs to the technical field of modification of ultra-high molecular weight polyethylene, and specifically relates to an ultra-high molecular weight polyethylene material capable of continuously releasing lubricant on the surface and a preparation method thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMW-PE) is a thermoplastic engineering plastic with a linear structure and excellent comprehensive properties. Its development is very rapid. Before the 1980s, the world's average annual growth rate was 8.5%. After entering the 1980s, The growth rate is as high as 15%~20%, while the average annual growth rate in my country is above 30%. In 1978, the world consumption was 12,000 to 12,500 tons, and by 1990, the world demand was about 50,000 tons, of which the United States accounted for 70%. From 2007 to 2009, China gradually became the world's engineering plastics factory, and the ultra-molecular weight po...

AI Technical Summary

Problems solved by technology

[0003] The current application of ultra-high molecular weight polyethylene mainly relies on the self-lubrication of materials or external lubricants. External lubricants are rarely used in actual use due to pollution, anti-adhesion of ultra-high molecular weight polyethylene, etc. When used for a period of time The surface becomes rough, the self-lubrication will decrease, and the friction coefficient will increase