Process for transversely stretching polyethylene terephthalate f

Details Process for transversely stretching polyethylene terephthalate f Process for transversely stretching polyethylene terephthalate f

1979-08-09

1980-12-09

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642902, 528176, 528298, B29D 724, B29C 1702

Patent

active

042384435

ABSTRACT:
A process is disclosed for transversely stretching amorphous polyethylene terephthalate film wherein the temperature is adjusted to be substantially uniform across the web before stretching, heat is removed during stretching, and after stretching, the temperature is 1 to 15C..degree. lower and is uniform across the web.

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