Method of forming composite ultrahigh molecular weight polyethylene material
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United States of America Patent
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Nov 4, 2003
Grant Date -
N/A
app pub date -
Mar 27, 2001
filing date -
Mar 27, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention concerns a composite article having joined ultrahigh molecular weight polyethylene and melt-flowable polyethylene portions and method of making the same. The ultrahigh molecular weight polyethylene portion has a textured surface with a pattern of ribs which may vary in shape and configuration, such as a series of parallel ribs or a plurality of pins of various cross-sectional shapes, e.g., oval, round or rectangles. The melt-flowable polyethylene portion is melt-bonded to or fused to the ribs of the ultrahigh molecular weight polyethylene portion providing high bond strengths between the two portions. In the method of the invention, a ultrahigh molecular weight polyethylene portion having a rib surface is contacted with molten, melt-flowable polyethylene. The molten, melt-flowable polyethylene is at a sufficient temperature that the temperature of the ribs is raised quickly to a temperature enabling the melt-flowable polyethylene to strongly melt-bond to the ribbed surface.
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