Regenerated cellulose film, aluminum foil laminates and method f

Details Regenerated cellulose film, aluminum foil laminates and method f Regenerated cellulose film, aluminum foil laminates and method f

1976-03-01

1977-02-22

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of polyamidoester

428425, 428464, 428485, 428532, 428457, B32B 2740, B32B 1500

Patent

active

040093190

ABSTRACT:
Laminates of uncoated regenerated cellulose film and aluminum foil comprising the combination in which the cellulose film is softened or plasticized with a lower alkylene polyalkylene glycol and bonded with the aluminum foil using a polyethylene phthalate ester-urethane adhesive. The resulting laminate structure possesses superior resistance to delamination when compared with similar laminates of coated regenerated cellulose film and aluminum foil or such laminates in which the cellulosic film is softened with conventional monomers, such as ethylene glycol, propylene glycol or glycerin. Preferred softeners for use in the combination are polyethylene glycols or polypropylene glycols having a molecular weight ranging from 200 to 800.

REFERENCES:
patent: 2328679 (1943-09-01), Rothrock
patent: 2721150 (1955-10-01), Grantham
patent: 2987418 (1961-06-01), Wooding
patent: 3009831 (1961-11-01), Wilfinger
patent: 3168409 (1965-02-01), Wellisch
patent: 3248254 (1966-04-01), Zenk
patent: 3490987 (1970-01-01), Bauriedel
patent: 3616190 (1971-10-01), Shaw
patent: 3759379 (1973-09-01), Wrede
patent: 3840395 (1974-10-01), Koch
"Cellophane", Encyclo. of Poly. Science and Tech., vol. 3, pp. 60-79, 1965.

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