| US 7,547,405 B2 | ||
| Solid state deformation processing of crosslinked high molecular weight polymeric materials | ||
| David Wayne Schroeder, Winona Lake, Ind. (US); Jordan H. Freedman, Fort Wayne, Ind. (US); James E. Gunter, Claypool, Ind. (US); Brian D. Salyer, East Warsaw, Ind. (US); and H. Gene Hawkins, Warsaw, Ind. (US) | ||
| Assigned to Biomet Manufacturing Corp., Warsaw, Ind. (US) | ||
| Filed on Apr. 12, 2006, as Appl. No. 11/402,561. | ||
| Application 11/402561 is a continuation in part of application No. 10/963974, filed on Oct. 13, 2004, granted, now 7,344,672. | ||
| Application 10/963974 is a continuation in part of application No. 10/963975, filed on Oct. 13, 2004. | ||
| Claims priority of provisional application 60/616811, filed on Oct. 07, 2004. | ||
| Prior Publication US 2006/0258767 A1, Nov. 16, 2006 | ||
| Int. Cl. C08J 5/00 (2006.01); B28B 3/00 (2006.01); B28B 3/26 (2006.01); B29C 43/02 (2006.01); B29C 43/32 (2006.01) | ||
| U.S. Cl. 264—319 [264/320; 264/331.19; 264/331.21; 264/331.11; 264/331.17] | 25 Claims |
| 1. A method for reducing the free radical concentration in irradiated crosslinked bulk polymer, the polymer being in the form
of a bulk material elongated in an axial direction, the method comprising:
heating the crosslinked bulk material to a compression deformable temperature;
applying a force to deform the heated bulk material in a direction orthogonal to the axial direction by extruding the heated
bulk material through an isoareal die; and
cooling the polymer to a solidification temperature.
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