Polyester films with improved processability and tear resistance

Details Polyester films with improved processability and tear resistance Polyester films with improved processability and tear resistance

1980-05-19

1982-01-19

Robinson, Ellis P.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428335, 428336, 428339, 428355, 428480, 428910, 220260, 220359, B65D 4102, B65D 4132, B32B 2736

Patent

active

043117414

ABSTRACT:
Polyester films consisting of a homogeneous fused, intimate mixture of polyethylene terephthalate (PET) with sufficient polytetramethylene terephthalate (PTMT) to increase film tear strength in excess of 10%. Mixed PET and PTMT resins are extruded and used to produce unoriented, uniaxially oriented, and biaxially oriented polyester films with significantly increased tear strengths. Increased tear strengths are exhibited at different PET-PTMT weight ratios depending upon the orientation of the film.

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