Plastic and nonmetallic article shaping or treating: processes – Orienting or aligning solid particles in fluent matrix material
Patent
1980-07-15
1982-06-01
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Orienting or aligning solid particles in fluent matrix material
264176R, 264205, 528176, 528272, 528310, B29D 302
Patent
active
043327591
ABSTRACT:
The present invention provides an improved process for extruding liquid crystal polymer. The process comprises the steps of providing a fluid stream of liquid crystal polymer wherein the stream has a flow pattern comprising substantial shear flow; converting the flow of the fluid stream of liquid crystal polymer to a substantially elongational flow in the substantial absence of shear flow; and extruding the fluid stream of liquid crystal polymer to form a shaped article having the polymer molecules oriented substantially parallel to the flow direction. The resulting articles are self-reinforcing, having mechanical properties superior to conventional extruded liquid crystal polymer articles and comparable to those of articles formed from fiber-reinforced isotropic polymeric materials. In a preferred embodiment, the flow of the fluid stream of liquid crystal polymer is converted to a substantially elongational flow by passing the fluid stream of liquid crystal polymer through at least one grid having a plurality of converging passages (e.g., cone-shaped or trumpet-shaped holes).
REFERENCES:
patent: 2838011 (1958-06-01), Braibanti et al.
patent: 2892675 (1959-06-01), Bradshaw
patent: 2923972 (1960-02-01), DeGhetto
patent: 3856277 (1974-12-01), Tiramani
patent: 4015924 (1977-04-01), LaNieve
patent: 4130545 (1978-12-01), Calundann
patent: 4160755 (1979-07-01), Choe et al.
patent: 4183895 (1980-01-01), Luise
patent: 4247514 (1981-01-01), Luise
Barris Charles B.
Celanese Corporation
Woo Jay H.
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