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    • 1. 发明授权
    • Transparent thermal recording medium
    • 透明热敏记录介质
    • US5739077A
    • 1998-04-14
    • US714261
    • 1996-09-17
    • Hiroshi GotoHideaki EmaKiyoshi Sakai
    • Hiroshi GotoHideaki EmaKiyoshi Sakai
    • B41M5/30B41M5/323B41M5/327B41M5/333B41M5/337B41M5/42
    • B41M5/42B41M5/323B41M5/327B41M5/3335B41M5/3372
    • This invention provides a transparent thermal recording medium, in which the transparent thermal recording medium comprises: a thermal recording layer, which is provided on a transparent layer, consisting essentially of an electron-donating chromophoric compound, an electron-accepting compound and binder resin; and a further-provided protective layer having an approximately equal refractive index to the refractive index of the thermal recording layer, wherein the binder resin is a compound having a group selected from a hydroxyl group and a carboxyl group. The transparent thermal recording medium can be effectively used for a block copy film, on which an image is formed, for plate-making, particularly, in photogravure, offset printing and screen process printing, because the transparent thermal recording medium has a contrast of light transmission factors between a color-imaging portion and a non-imaging portion, in which the contrast is not less than 50% at a wavelength ranging from 370 nm to 450 nm.
    • 本发明提供了一种透明热敏记录介质,其中透明热敏记录介质包括:热敏记录层,其设置在透明层上,主要由供电子发色化合物,电子接受性化合物和粘合剂树脂组成; 以及具有与热敏记录层的折射率近似相等的折射率的另外设置的保护层,其中粘合剂树脂是具有选自羟基和羧基的基团的化合物。 透明热敏记录介质可以有效地用于形成图像的块复制膜,用于制版,特别是在照相凹版印刷,胶版印刷和丝网印刷中,因为透明热敏记录介质具有光的对比度 在370nm至450nm的波长范围内对比度不小于50%的彩色成像部分和非成像部分之间的透射因子。