The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2002
Filed:
Oct. 27, 1999
Technische Universiteit Eindhoven, Eindhoven, NL;
Abstract
A method for processing ultra-high molecular weight polyethylene (UHMWPE) of at least 400,000 by heating under an elevated pressure, followed by cooling, wherein UHMWPE having a lamellar thickness <12 nm and a melting temperature at atmospheric pressure >141° C. is used, by carrying out the heating under an elevated pressure via a transient hexagonal phase, which phase is represented by the hatched area in the Figure, which lies below the equilibrium line of the phase transition orthorhombic phase—liquid phase, which area is enclosed by points (P , T ′), (P , T ′), (P , T ) and (P , T ), wherein T and T represent the equilibrium temperatures associated with pressures P and P respectively, followed by heating to melting and cooling to ambient temperature.