Plastic information-recording medium

Details Plastic information-recording medium Plastic information-recording medium

1982-06-23

1985-06-18

Pellinen, A. D.

Recorders

Record receivers and/or driving means therefor

Laminated, impregnated, or coated bases

346 76L, 369283, 369284, G01D 1534

Patent

active

045243697

ABSTRACT:
A plastic information-recording medium comprises a pair of juxtaposed transparent plastic substrates molded from a composition, which is comprised of a copolymer consisting of 5 to 25% by weight of acrylonitrile or methacrylonitrile and 95 to 75% by weight of at least one of other monomers copolymerizable with acrylonitrile or methacrylonitrile than styrene or a styrene derivative, or a composition comprising at least 70% by weight of the copolymer and at most 30% by weight of butadiene rubber, and has a clearance between the substrates, the clearance being gas-tightly blocked from an outside atmosphere by joining the substrates together at peripheral edges thereof, and a recording film being provided on each of clearance-facing sides of the substrates.

REFERENCES:
patent: 4074282 (1978-02-01), Balas, Jr. et al.
patent: 4373004 (1983-02-01), Asano et al.
patent: 4414273 (1983-11-01), Wada et al.

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