Biaxially stretched composite styrene resin sheet

Details Biaxially stretched composite styrene resin sheet Biaxially stretched composite styrene resin sheet

1987-06-23

1989-05-30

Ives, P. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428519, 428910, 2641761, B32B 2730

Patent

active

048350419

ABSTRACT:
A biaxially stretched composite styrene resin sheet of a multilayer structure, comprising at least one layer of polystyrene and at least two layers of a mixture of polystyrene and styrene/butadiene block copolymer resin, wherein both outside layers are formed of said mixture, the thickness of each of the outside layers is 1 to 20% of the total thickness of the sheet, and the entire sheet is biaxially stretched.

REFERENCES:
patent: 4111349 (1978-09-01), Buckler et al.
patent: 4302554 (1981-11-01), Nabeta et al.
patent: 4338378 (1982-07-01), Nabeta et al.
patent: 4528221 (1985-07-01), Komatsuzaki et al.
European Search Report dated Sep. 13, 1988.
Abstract, 14373 D/09, Asahi Dowkk, 6/1979 J55163-164.

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