METHOD OF FORMING POLYMER

摘要

A process for the extrusion of orientable, thermoplastic polymer material such as ultra high molecular weight polyethylene comprises: (i) forming a gel of a polymer material by crystallisation from a solution thereof in a solvent; (ii) removing solvent from the gel to produce a polymer material containing not more than 5% by weight of solvent; and (iii) extruding the solid polymer material through a die so as to orient the polymer material. The product may have a cross-sectional area of at least 10mm<2> and a Young's modulus of at least 15 GPa. m