Thermo-shrinkable polyester film

Details Thermo-shrinkable polyester film Thermo-shrinkable polyester film

1989-09-08

1991-02-26

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

5283081, 5283082, 5283086, 528502, 528503, 2642107, 26421112, C08G 6302

Patent

active

049962914

ABSTRACT:
A thermo-shrinkable polyester film of this invention is obtained from a composition that comprises acid components including terephthalic acid and glycol components including ethyleneglycol. The polyester film has a heat-shrinkage ratio of 30% or more in a certain direction at 100.degree. C., and a shrinkage ratio of 5% or more at the point of intersection of a curve showing the internal shrinkage stress of the film and a curve showing the tensile stress of the film.

REFERENCES:
patent: 3477989 (1969-11-01), Zarn et al.
patent: 4020141 (1977-04-01), Quinn et al.
patent: 4766033 (1988-08-01), Yoshimura et al.

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