Heat shrinkable film

Details Heat shrinkable film Heat shrinkable film

1987-03-02

1989-01-31

Seccuro, Carman J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5263481, 524528, C08L 2308, C08L 2318

Patent

active

048016527

ABSTRACT:
A biaxially stretched film of an ethylene copolymer, preferably a mixture of (A) 90 to 50% by weight of a linear ethylene-.alpha.-olefin copolymer having a density of 0.90 to 0.93 g/cm.sup.3 at 25.degree. C. and a melt index of 0.2 to 3.0 g/10 min. and (B) 10 to 50% by weight of an ethylene polymer having a density of 0.87 to 0.91 g/cm.sup.3 at 25.degree. C. and less than the density of the copolymer (A) by at least 0.014 g/cm.sup.3 and a melt index of 0.2 to 5.0 g/10 min., said copolymer or copolymer mixture giving a DSC curve with an endothermic area under the temperature lower than its melting temperature (main endothermic peak temperature) by 10.degree. C. accounting for at leat 55% of the total endothermic area. The stretched film is little varying in thickness and is excellent in heat shrinkability at low temperature.

REFERENCES:
patent: 4354997 (1982-10-01), Mizutani et al.
patent: 4413097 (1983-11-01), Matsuura et al.
patent: 4429079 (1984-01-01), Shibata et al.
patent: 4463153 (1984-07-01), Mizutani et al.
patent: 4597920 (1986-07-01), Golike
Mitsui-Abstract of Japanese 52039-741-(3-77).
Showa Denko-Abstract of Japanese 57059-943 (4-82).

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