Metalized bonded sheets comprising a polyolefinic film and a pol

Details Metalized bonded sheets comprising a polyolefinic film and a pol Metalized bonded sheets comprising a polyolefinic film and a pol

1980-03-07

1983-06-07

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

428 35, 428461, 428463, 428518, 428522, B32B 1508

Patent

active

043871356

ABSTRACT:
A bonded sheet for packaging is disclosed having a thickness of from 20 to 200 microns and comprising two films, one of which is obtained from chlorovinyl polymers and the other from olefinic polymers, and characterized in that one of the two films has, on its surface in contact with the other film, a metalized coating with a resistivity of from 1 to 5 Ohms. The chlorovinyl polymer film is a film, optionally stretched, prepared from polymers or copolymers of vinyl chloride, having a Fikentscher value K of from 40 to 80. The polyolefinic film is a film, optionally oriented by stretching, prepared from a polymer selected from the class consisting of a polyethylene with a melt index of from 0.5 to 15, a polypropylene with a melt index of from 1 to 20, a crystalline propylene/ethylene copolymer containing from 0.1 to 15% by weight of ethylene and with a melt index of from 1 to 20, or mixtures thereof. The metalized layer preferably consists of aluminum, and at least one of the two films is coated with a thermowelding layer.

REFERENCES:
patent: 3136468 (1964-06-01), Keller
patent: 3836679 (1974-09-01), Seiferth et al.
patent: 4211811 (1980-07-01), Bordini
patent: 4278716 (1981-07-01), Buchner

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