公开(公告)号：US20090224428A1

公开(公告)日：2009-09-10

申请号：US12471189

申请日：2009-05-22

Applicant: David Wayne SCHROEDER ,  Jordan H. FREEDMAN ,  James E. GUNTER ,  Brian D. SALYER ,  H. Gene HAWKINS

Inventor： David Wayne SCHROEDER ,  Jordan H. FREEDMAN ,  James E. GUNTER ,  Brian D. SALYER ,  H. Gene HAWKINS

IPC: B29C43/22

CPC classification number: A61L27/16 ,  A61L27/50 ,  C08J3/28 ,  C08J2323/06 ,  C08L23/06

Abstract: Solid-state deformation processing of crosslinked high molecular weight polymers such as UHMWPE, for example by extrusion below the melt transition, produces materials with a desirable combination of physical and chemical properties. Crosslinked bulk materials are heated to a compression deformable temperature, and pressure is applied to change a transverse dimension of the material. After cooling and stress relieving, a treated bulk material is obtained that has enhanced tensile strength in the axial direction orthogonal to the dimension change. In preferred embodiments, medical implant bearing materials are machined from the treated bulk material with the in vivo load bearing axis substantially parallel or coincident with the axial direction of the treated bulk material.

Abstract translation: 交联的高分子量聚合物如UHMWPE的固态变形处理例如通过在熔融转变以下挤出产生具有所需物理和化学性质组合的材料。 将交联的散装材料加热至压缩变形温度，施加压力以改变材料的横向尺寸。 在冷却和减轻应力之后，获得了与尺寸变化正交的轴向拉伸强度提高的经处理的散装材料。 在优选实施例中，医疗植入物轴承材料由经处理的散装材料加工，其中体内承载轴线基本上与经处理的散装材料的轴向方向平行或重合。