Multilayer, sterilizable deep-drawing film

Details Multilayer, sterilizable deep-drawing film Multilayer, sterilizable deep-drawing film

1984-04-18

1985-10-15

Kittle, John E.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

428 35, 428520, 53170, 2064842, B32B 2708, B65D 134

Patent

active

045474273

ABSTRACT:
A multilayer film and containers made thereof, the film being composed of a four layer composite film produced by flattening upon itself, a two layer coextruded blown tube, the outer layer of said tube being linear polyethylene or high density polyethylene, and the inner layer of said tube being ethylene methacrylic acid copolymer crosslinked with metal ions or an ethylene vinylacetate copolymer, said outer layer and said inner layer of said tube being secured to one another by melt-bonding, whereas the surfaces of said inner layer being secured to one another by a mechanical, detachable heat-bonding, said heat-bonding being achieved by flattening said tube and contacting said surfaces under the influence of heat and pressure.

REFERENCES:
patent: 3595735 (1971-07-01), Tyrrell
patent: 3595740 (1971-07-01), Gerow
patent: 3697368 (1972-10-01), Bhuta et al.
patent: 3775239 (1973-11-01), Snow
patent: 3932692 (1976-01-01), Hirata et al.
patent: 4079850 (1978-03-01), Suzuki et al.
patent: 4329388 (1982-05-01), Vicik et al.
patent: 4352702 (1982-10-01), Bornstein
patent: 4382513 (1983-05-01), Schirmer et al.

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