Tubular film of polyethylene terephthalate and process for the p

Details Tubular film of polyethylene terephthalate and process for the p Tubular film of polyethylene terephthalate and process for the p

1975-03-18

1977-07-05

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264209, 264210R, 264288, 264290T, 425326R, B29D 724, B29C 1702

Patent

active

040340554

ABSTRACT:
This invention relates to a biaxially stretched and longitudinally afterstretched thin-walled tubular film of polyethylene terephthalate having a tensile stress of 40 to 60 kg/mm.sup.2 and a tear resistance of 40 to 70 kg/mm.sup.2 in the longitudinal direction, and an elongation at break of 350 to 800% in the transverse direction. The invention also relates to a process for the production of the film.

REFERENCES:
patent: 2578899 (1951-12-01), Pace
patent: 3551540 (1970-12-01), Pellicciari et al.
patent: 3659000 (1972-04-01), Cronk
patent: 3725519 (1973-04-01), Seifried et al.

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