Steels continued fabrication methods

For the above reason, Doshisha University and Kobe Steel started joint development of the continuous granulation method by NF, which is not used in the manufacture of cotton yam, but used with short fibers such as BF. First, NF of the short fiber is wrapped in the TP resin nonwoven fabric similar to the ingredients in rolled sushi. Simultaneously, a denaturing agent is also mixed in order to improve the interface adhesiveness of the NF and TP resin. In addition, a cohesive force is directly supplied by the screw of the TSE. The nonwoven fabric made of TP resin is melted by the shear stress of the TSE. As a result, the short fibers of the NF are compounded with the TP resin. PP, PET, and PLA are used as the nonwoven fabric [20, 21]. 

Because the sterilization of UHMWPE continues to be a controversial topic, even today, it is helpful to review the early methods in use at Wrightington for joint replacement components. The stainless steel femoral components were produced by Thackray [17]. Prior to 1968, only the final polishing of the femoral heads would be performed at Wrightington. After 1968, the stems were fabricated entirely by Thackray. The femoral components were provided nonsterile by Thackray and sterilized at the hospital by autoclaving. This sterilization method was not appropriate for UHMWPE, which would distort after prolonged steam exposure. 

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