| 摘要 |
Self-reinforced composites of amorphous thermoplastic materials such as polymethylmethacrylate, polycarbonate and polysulfone are made by melt-extruding and simultaneously drawing and cooling the material to produce fibers (21) with longitudinally-oriented molecular chains, then arranging the fibers (21) in a preform, such as a mat, rod, plate or other useful shape, in which adjacent fibers (21) are in contact with each other, and thereafter heating the preform with fiber constraint to a temperature above the glass transition temperature and below the degradation temperature of the thermoplastic, and applying pressure, to soften and fuse together the outer surfaces (23) of the fibers (21) without completely eliminating the longitudinal orientation of the molecules within the fibers (21).
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