Flexible optical recording material in the shape of tape or flop

Details Flexible optical recording material in the shape of tape or flop Flexible optical recording material in the shape of tape or flop

1988-08-26

1990-03-06

Robinson, Ellis P.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428913, 428420, 428522, 346761, 3461351, 430945, 369288, B32B 302

Patent

active

049064983

ABSTRACT:
A flexible optical recording material in the shape of tape or floppy disk comprising an optically isotropic laminate (A) comprising at least one thermoplastic gas-impermeable synthetic resin film layer (1) and at least one cured crosslinking resin layer (2), said layers having been formed by casting and having a retardation value of not less than 80 nm as a whole, and a recording layer (B) disposed on at least one side of said optically isotropic laminate.

REFERENCES:
patent: 4291100 (1981-09-01), Horijome et al.
patent: 4623570 (1986-11-01), Alexander et al.
patent: 4636458 (1987-01-01), Wenzel et al.
patent: 4637945 (1987-01-01), Masui et al.
patent: 4717624 (1988-01-01), Ikenage et al.
patent: 4729805 (1988-03-01), Alexander et al.
patent: 4801670 (1989-01-01), DeMartino et al.
patent: 4808332 (1989-02-01), DeMartino et al.

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