Verfahren zur Herstellung von Halbzeugen aus hoch- oder ultrahochmolekularen Polymeren, derart hergestellte Halbzeuge sowie deren Verwendung

摘要

The invention concerns a method for producing semi-products as well as moulded parts and finished products made of high and ultra-high molecular weight, in particular of polyethylene having a mean mole weight higher than 5000000 g/mole, using a sintering process. The polymer, comprised in a support containing an oxygen-free atmosphere, is compressed to produce a moulded 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 to enhance aging resistance and wear resistance of the semi-products and moulded parts.