Patent ID: 6121413
Filing Date: 2000-09-19
Classification: A61F,A61L,B29C,B29K

Abstract:
A process for reducing the modulus of elasticity of a prefabricated ultra high molecular weight polyethylene shaped article comprising the steps of:(a) supporting the prefabricated shaped article, having a first modulus of elasticity, in a device to minimize warpage of the article;(b) heating the article to a temperature above the melting point of the polyethylene that results in a decrease in the modulus of elasticity of the article while below a temperature that produces substantial dimensional changes outside the desired tolerance limits;(c) quenching the shaped article with a fluid to a temperature at least below the melting point of the polyethylene; and(d) removing the shaped article from the supporting device, wherein the final product has an ending modulus of elasticity that is below the first modulus of elasticity.