METHOD FOR PRODUCING POLYMER SEMI-PRODUCTS WITH HIGH AND ULTRA-HIGH MOLECULAR WEIGHT, RESULTING SEMI-PRODUCTS AND USES THEREOF

摘要

The invention concerns a method for producing semi-products as well as molded parts and finished products made of high and ultra-high molecular weight, in particular of polyethylene having a mean mole weight higher than 500,000 g/mole, using a sintering process. The polymer, comprised in a support containing an oxygen-free atmosphere, is compressed to produce a molded part or a semi-product and is then separated from the support. The invention also concerns the resulting semi-products. Increased density and low free radical content enable enhanced aging resistance and wear resistance of the semi-products and molded parts.