Structural element formed of a fiber reinforced thermoplastic material and method of manufacture
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United States of America Patent
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Jul 30, 1996
Issued Date -
N/A
app pub date -
Apr 7, 1995
filing date -
Jul 14, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A structural member of fiber reinforced composite material suitable for secondary processing and a method of processing is described. The structural member before secondary processing is typically a multi-ply tube, rod, or sheet formed with an outer sheath of fiber reinforced thermoplastic material having a melting temperature t.sub.m1 and an inner core material, also fiber reinforced thermoplastic, having a melting temperature, t.sub.m2 lower than t.sub.m1. The member, prior to secondary processing, is thermoplastic. In a secondary process the member is heated to a temperature between t.sub.m1 and t.sub.m2, but sufficient to render the outer sheath malleable. The member is deformed to a desired geometry, such as a helix, and cooled to a hardened state.
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