Multilayer chlorine-free film with barrier layer of a polyamide

Details Multilayer chlorine-free film with barrier layer of a polyamide Multilayer chlorine-free film with barrier layer of a polyamide

1998-05-22

2000-11-07

Robinson, Ellis

Stock material or miscellaneous articles

Hollow or container type article

Nonself-supporting tubular film or bag

428 367, 428220, 4284758, 4284763, 428520, 428349, 604332, A61F 544, B65D 3002, B65D 3026, B32D 2732, B32D 2734

Patent

active

061433837

ABSTRACT:
A multilayer heat-sealable chlorine-free film of relatively low modulus, high interlaminar strength, and low noise upon flexing is provided. The film includes an odor barrier layer and at least one directly adjoining heat-sealable skin layer. The barrier layer is composed of either an aliphatic or partially aromatic polyamide resin, or a blend thereof, blended with an ionomer resin consisting essentially of a partially neutralized ethylene-methacrylic acid copolymer, and the heat-sealable skin layer or layers bonded directly to the barrier layer are composed of copolymers of ethylene and an ester-containing comonomer. High resistance to delamination of the barrier layer and skin layer(s) is achieved without tie layers therebetween. Pouches formed of such multilayer chlorine-free films are also disclosed.

REFERENCES:
patent: 4801649 (1989-01-01), Statz
patent: 4977216 (1990-12-01), Elia
patent: 5407713 (1995-04-01), Wilfong et al.
patent: 5496295 (1996-03-01), Wilfong et al.
patent: 5567489 (1996-10-01), Allen et al.
patent: 5643375 (1997-07-01), Wilfong et al.
patent: 5895694 (1999-04-01), Zavadsky et al.
Derwent Abstract of JP 6-9833A; Showa; Resin Composition With High Compatability and Gas Barrier Properties, 1994.
Derwent Abstract of JP 58-29854A; Toray; Flexible Shock Resistant Polyamide Resin Composition, 1983.

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