Heat sealable packaging film producing a peelable seal
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United States of America Patent
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Nov 30, 1982
Grant Date -
N/A
app pub date -
Jun 17, 1981
filing date -
Jun 20, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A heat sealable packaging film particularly suitable for producing a peelable seal by heat sealing on polystyrene. For this purpose, the composition of the film comprises: (a) 50 to 70% by weight of at least one ethylene polymer having a melt index of 0.5 to 7 g/10 min and selected from polyethylene having a density of from 0.910 to 0.925 g/cm.sup.3 and an ethylene-vinyl acetate copolymer containing at most 7% by weight of vinyl acetate. (b) 20 to 30% by weight of at least one ethylene-vinyl acetate copolymer containing 20 to 30% by weight of vinyl acetate and having a melt index of 0.5 to 7 g/10 min, and (c) 10 to 20% by weight of a styrene homopolymer having a melt index of 0.5 to 7 g/10 min. Also provided are packages including a container made from polystyrene and a covering film for the said container, which is made from the aforesaid film, laminated or not on other films.
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