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    • 1. 发明授权
    • Plastic information-recording medium
    • 塑料信息记录介质
    • US4524369A
    • 1985-06-18
    • US391374
    • 1982-06-23
    • Masaaki SatoAizo KanedaMakio Watanabe
    • Masaaki SatoAizo KanedaMakio Watanabe
    • B41M5/26G11B7/24G11B7/243G11B7/253G11B7/26G01D15/34
    • G11B7/26G11B7/2533G11B7/2433G11B7/2536
    • 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.
    • 塑料信息记录介质包括由组合物模制的一对并置的透明塑料基材,该组合物由共聚物组成,该共聚物由5至25重量%的丙烯腈或甲基丙烯腈和95至75重量%的其它至少一种 可与苯乙烯或苯乙烯衍生物共聚的单体与丙烯腈或甲基丙烯腈共聚的单体,或包含共聚物的至少70重量%和至多30重量%的丁二烯橡胶的组合物,并且在基材之间具有间隙, 通过在其周边边缘处将基板接合在一起而与外部气氛紧密地阻挡,并且在基板的面向两侧的每个上设置有记录膜。