Flexible thermoplastic structures with multiple coextruded polym

Details Flexible thermoplastic structures with multiple coextruded polym Flexible thermoplastic structures with multiple coextruded polym

1987-07-10

1988-09-27

Ives, P. C.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428520, 2641761, 426127, B32B 2708

Patent

active

047741465

ABSTRACT:
The flexible thermoplastic structures comprise a vinylidene chloride copolymer layer bonded to a plasticized vinyl chloride polymer layer through the intermediacy of a mixture of polymeric adhesives consisting of 10 to 90 parts by weight of a copolymer of vinyl acetate and ethylene and of 90 to 10 parts by weight of a copolymer of vinyl chloride and vinyl acetate and whose shear elastic modulus G' at 121.degree. C. and 10.sup.-4 cycles/second is greater than 0.5 10.sup.3 Pa.
The flexible thermoplastic structures with coextruded polymeric layers may be in the form of films, sheets, tetra-packs or flexible pouches capable of being employed in the packaging field.

REFERENCES:
patent: 3953660 (1976-04-01), Ishida
patent: 4133926 (1979-01-01), Vorrier et al.
patent: 4288488 (1981-09-01), Hisazumi et al.
patent: 4320175 (1982-03-01), Hisazumi et al.
European Search Report 1987

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