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    Process for producing a new class of ultra-high-molecular-weight polyethylene orthopaedic prostheses with enhanced mechanical properties
    9.
    发明授权
    Process for producing a new class of ultra-high-molecular-weight polyethylene orthopaedic prostheses with enhanced mechanical properties 失效
    用于生产具有增强的机械性能的新型超高分子量聚乙烯矫形假体的方法

    公开(公告)号：US5030402A

    公开(公告)日：1991-07-09

    申请号：US325563

    申请日：1989-03-17

    申请人： Anagnostis E. Zachariades

    发明人： Anagnostis E. Zachariades

    IPC分类号： A61F2/30 ,  A61F2/34 ,  A61F2/38 ,  B29C33/00 ,  B29C43/00 ,  B29C43/02 ,  B29C43/16 ,  B29C43/36 ,  B29C55/18

    CPC分类号： B29C43/02 ,  A61F2/30 ,  B29C33/0055 ,  B29C43/003 ,  B29C43/16 ,  B29C43/361 ,  B29C55/18 ,  A61F2/3094 ,  A61F2/34 ,  A61F2/389 ,  B29C2793/009 ,  B29K2023/0683 ,  B29K2105/108 ,  B29K2995/0041 ,  B29K2995/0045 ,  B29K2995/0054 ,  B29L2031/7532

    摘要： A method for producing an UHMWPE product with enhanced planar mechanical properties. An initial UHMWPE semicrystalline morphology is solid-state deformed under compression in a mold including a mold cavity with an unenclosed perimeter zone or a perimeter zone with a reservoir enabling flow-through for molded UHMWPE. A polymer preform is oriented and extended in more than one direction in the mold cavity and the perimeter zone to an extent which is limited by the material properties of the polymer under the employed processing conditions. The oriented and extended UHMWPE is cooled under compression to ambient temperature for maintaining the maximum orientation and extension attained during the solid-state deformation process. The polymer product in the mold cavity is separated from the product in the perimeter zone of the mold cavity. The UHMWPE product has a markedly transformed morphology, as compared with the initial UHMWPE morphology. The product comprises oriented and extended molecular chains in more than one direction and exhibits markedly enhanced mechanical properties in more than one direction, the magnitude depending on the extent of deformation.

    摘要翻译： 一种具有增强的平面机械性能的UHMWPE产品的制造方法。 初始的UHMWPE半晶体形态在模具中是固态变形的，该模具包括具有未封闭周边区域的模具腔或具有能够使模制UHMWPE流通的储存器的周边区域。 聚合物预成型件在模腔和周边区域中的多于一个方向上被定向和延伸到受所使用的加工条件下聚合物的材料性质限制的程度。 定向和扩展的UHMWPE在压缩下冷却至环境温度，以保持在固态变形过程中获得的最大取向和延伸。 模腔中的聚合物产物在模具腔的周边区域与产品分离。 与初始UHMWPE形态相比，UHMWPE产品具有明显变形的形态。 该产品在多于一个方向上包含定向和延伸的分子链，并且在多于一个方向上显示出显着增强的机械性能，其大小取决于变形程度。