Electromagnetically welded composite and the preparation thereof
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United States of America Patent
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Mar 5, 2002
Grant Date -
N/A
app pub date -
Nov 14, 2000
filing date -
Nov 18, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is an article comprising a fiber-reinforced engineering thermoplastic polyurethane composite welded to a thermoplastic part by way of an interlayer containing a dispersion of a ferromagnetic material and a method for preparing the same. Alternatively, the composite or the thermoplastic part or both may contain the ferromagnetic material. A tight bond is created by subjecting the ferromagnetic material to a radio-frequency magnetic field to generate heat, which locally melts composite and the thermoplastic part, then allowing the subjected areas to cool. The invention is particular useful for the preparation of window frames.
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