Heat-sealable plastic films

Details Heat-sealable plastic films Heat-sealable plastic films

1994-11-01

1996-06-18

Buttner, David

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428349, 428352, 525 80, 525 93, 525227, B65D 4120, B65D 6540, B32B 2730, C08L 3310

Patent

active

055275761

ABSTRACT:
This invention relates to plastic containers hermetically sealed with a peelably heat-sealable plastic film comprised of a polymeric mixture comprised of 1-99 parts by weight (pbw) of an impact-resistant polystyrene resin and 99-1 pbw of a copolymer consisting essentially of:
p1) 20-90 weight % methyl methacrylate, ethyl methacrylate or a mixture thereof;
p2) 10-80 weight % of at least one monomer of formula (I): ##STR1## and where R.sub.1 represents an alkyl group with 3-24 C atoms; and
p3) 0-10 weight %, preferably 1-8 weight %, of a monomer which is copolymerizable with and different from the monomers (p1) and (p2).

REFERENCES:
patent: 4897441 (1990-01-01), Siol
patent: 5322900 (1994-06-01), Siol
Neue Verpackung, vol. 9, 1991, pp. 94-97 and 100-101, Dr. G. Stehle, "Verschlusse Fur Becher Und Schalen".
Ullmann's Encyclopedia of Industrial Chemistry, 5th Edition, vol. A11, pp. 523-560 and 583-618, 1988.
Zade, "Heatseal & High Frequency Welding Of Plastics", Temple Press, p. 31.

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