Stock material or miscellaneous articles – Composite
Patent
1993-06-09
1995-05-02
Ryan, Patrick J.
Stock material or miscellaneous articles
Composite
428412, 4284744, 428500, 428910, 428220, B32B 900
Patent
active
054118050
ABSTRACT:
A process is disclosed for the solid phase preparation of triaxially oriented synthetic polymeric material from an orientable amorphous but crystallizable or a semicrystalline thermoplastic polymeric workpiece comprising (a) presenting the conditioned workpiece, at the entry mode of an opposing pair of solid rollers that are spaced apart a distance substantially less than the thickness of the workpiece; and (b) deforming the workpiece by compressive passage through the paired rollers at a nominal deformation ratios of at least 2 to 1. The deformation drawing is carried out between the glass transition temperature and the melting point of the polymeric material, by applying a draw tension insufficient to cause tensile failure of the workpiece. Also disclosed is a rolltruded copolymer membrane or film-like material with a triaxial orientation morphology with a periodicity consisting essentially of crystallite and amorphous materials or a periodic distribution or crystalline and intercrystalline tie regions.
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Kikel Suzanne
Lee Kam
Ryan Patrick J.
Silverman Arnold B.
University of Pittsburgh of the Commonwealth System of Higher Ed
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