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  • Medical Device Link . Deformation, Morphology, and Wear Behavior of Polyethylene Used in Orthopedic Implants
    For more than 30 years, ultra-high-molecular-weight polyethylene (UHMWPE) has been used as a bearing material in total-joint-replacement prostheses. Such orthopedic implants usually comprise a metal (typically a cobalt-chromium alloy) or ceramic component that articulates against a UHMWPE component
  • U.S. Patents | 2004 | A B T |
    , Hewlett Packard Development Co., LP. U.S. 6,770,362 (20040803), High strength polyethylene fibers and their applications, Takayoshi Okano, Toyo Boseki Kabushiki Kaisha (JP). U.S. 6,770,363 (20040803), High strength polyethylene fibers and their applications, Takuya Konishi, Yasuo Ohta, and Godo
  • Less-sudden impact
    , N.J.: energy-absorbing safety belts. Conventional safety belts made from polyethylene terephthalate (PET) fibers tend to be relatively unyielding and, as such, transfer considerable force to an occupant's shoulders, chest, and pelvis. For example, such belts can exert about 2,000 lb at the torso
  • Plastic Compounder's PET Project: Recycling
    materials, and reducing waste are often easier said than done. However, the production of polybutylene terephthalate (PBT) from recycled polyethylene terephthalate (PET) is one conservation idea that is entering the mainstream. In the United States alone, consumers generate 4 billion lb of PET bottle waste
  • Surface Characterization of Weathered Wood-Plastic Composites Produced from Modified Wood Flour
    The effects of weathering on the surface properties of wood-plastic composites (WPC) were examined. High-density polyethylene (HDPE) based WPCs made from modified wood flour (untreated, extractives free, and holocellulose (delignified) fibers) were subjected to accelerated (xenon-arc) weathering
  • Medical Device Link . Specialty Compounds for Medical Applications: An Introduction
    , polyether block amide elastomer (PEBA), flexible nylon, polyethylene, styrenic block copolymer, or fluoropolymer. It is important to select a base resin or family that has most of the attributes required in the finished compound. For instance, if high tensile strength is called for in a semiflexible
  • A bright idea for the operating room
    , designers wanted to reduce costs by consolidating parts via metal-to-plastic conversion. "The switch to plastic would give us more flexibility for future versions of the lamp," Nieminen says. The company chose a 30% glass-fiber-reinforced blend of polybutadiene terephthalate (PBT) and polyethylene
  • Medical Device Link .
    Initial improvements included new grades of ultra-high-molecular-weight polyethylene (UHMWPE) and the application of irradiation treatments to induce cross-linking with consequent increased wear resistance. New metal alloys helped reduce implant stiffness and made implants closer to the properties

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