Method for producing doubly oriented polymers

Details Method for producing doubly oriented polymers Method for producing doubly oriented polymers

1991-05-24

1992-12-15

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

264280, 2642884, C08F 1000

Patent

active

051718154

ABSTRACT:
A process is disclosed for the solid phase preparation of doubly 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.

REFERENCES:
patent: 4789514 (1988-12-01), Lo

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