Stock material or miscellaneous articles – Composite – Of polyamidoester
Patent
1978-04-13
1979-07-31
Robinson, Ellis P.
Stock material or miscellaneous articles
Composite
Of polyamidoester
156306, 156309, 156331, 426126, 428 36, 428516, 428523, 428910, B32B 2740
Patent
active
041630807
ABSTRACT:
A flexible double-layer polypropylene laminate consisting of a bioriented film consisting essentially of isotactic polypropylene with an atactic polypropylene content of less than 6% by weight and an intrinsic viscosity (standard ASTM D 1601) of from 1.5 to 3.0 dl/g, adhesively bonded with a non-oriented film consisting essentially of a mixture of isotactic polypropylene and atactic polypropylene, the latter in an amount of from 15 to 30% by weight of the total weight of the said mixture, the isotactic polypropylene of said mixture having an intrinsic viscosity (standard ASTM D 1601) of from 1.0 to 1.5 dl/g and the atactic polypropylene of said mixture having a density (standard ASTM D 1505) of from 0.855 to 0.865 g/cm.sup.3 and a viscosity at 160.degree. C. of from 3,000 to 10,000 cps.
REFERENCES:
patent: 3547682 (1970-12-01), Erb
patent: 3553073 (1971-01-01), Rausing
patent: 3666585 (1972-05-01), Barbehenn
patent: 3695918 (1972-10-01), Ward
patent: 3775549 (1973-11-01), Matsuda
patent: 3862869 (1975-01-01), Peterson
patent: 3887755 (1975-06-01), Zammer
patent: 3965271 (1976-06-01), Harrington
Buzio Pierpaolo
Edefonti Lucio
Robinson Ellis P.
Societa Italiana Resine S.I.R. S.p.A.
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