Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1978-06-19
1980-07-01
Thibodeau, Paul J.
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
428215, 428332, 428516, 525 95, B32B 102, B65D 6538
Patent
active
042106869
ABSTRACT:
A multiple-layered, autoclavable, flexible plastic sheet comprises (a) at least one first layer consisting essentially of 30 to 90 percent by weight of a block copolymer having thermoplastic rubbery characteristics and having rubbery olefin blocks and blocks of a polystyrene; and from 10 to 70 percent by weight of a polyolefin derived principally from at least one of propylene, ethylene and 4-methylpentene-1, said polyolefin having a Vicat Softening Temperature of about 120.degree. C.; and (b) at least one second layer consisting essentially of a polyolefin derived principally by from at least one of propylene, ethylene, and 4-methylpentene-1 and being of semi-crystalline characteristics to exhibit low permeability to water vapor, the first and second layers being bonded together in alternating arrangement.
REFERENCES:
patent: 3424649 (1969-01-01), Nyberg et al.
patent: 3480696 (1969-11-01), Hassell et al.
patent: 3496061 (1970-02-01), Freshour et al.
patent: 3589976 (1971-06-01), Erb
patent: 3904470 (1975-09-01), Fukuki et al.
patent: 4140162 (1979-02-01), Gajewski et al.
Gajewski Henry
Laurin Dean G.
Measells Paul
Webster R. Daniel
Baxter Travenol Laboratories Inc.
Ellis Garrettson
Flattery Paul C.
Kirby, Jr. John P.
Thibodeau Paul J.
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