Abstract: A flat and nearly mechanically isotropic polymer film or sheet, or a tube, can be formed by laminating two or more films, preferably by coextrusion of a liquid crystal polymer film and a thermoplastic polymer film. A liquid crystal polymer layer may be combined with one or more thermoplastic polymer layer in various arrangements. The liquid crystal, and possibly the thermoplastic as well, may have a controlled molecular orientation. The film may be formed by passing a polymer through a set of two or three tubular rotors which are concentric and have facing surfaces which define inner and outer annular polymer flow channels.
Type:
Grant
Filed:
August 19, 1998
Date of Patent:
April 4, 2000
Assignee:
Superex Polymer, Inc.
Inventors:
Andrew C. Harvey, Richard W. Lusignea, Leslie S. Rubin
Abstract: A flat and nearly mechanically isotropic polymer film or sheet, or a tube, can be formed by laminating two or more films, preferably by coextrusion of a liquid crystal polymer film and a thermoplastic polymer film. A liquid crystal polymer layer may be combined with one or more thermoplastic polymer layer in various arrangements. The liquid crystal, and possibly the thermoplastic as well, may have a controlled molecular orientation. The film may be formed by passing a polymer through a set of two or three tubular rotors which are concentric and have facing surfaces which define inner and outer annular polymer flow channels.
Type:
Grant
Filed:
March 24, 1994
Date of Patent:
December 31, 1996
Assignee:
Superex Polymer Inc.
Inventors:
Andrew C. Harvey, Richard W. Lusignea, Leslie S. Rubin