申请人:DAI NIPPON PRINTING CO., LTD.
公开号:US20030181331A1
公开(公告)日:2003-09-25
The present invention is first directed to a thermal transfer sheet which is not high in cost for obtaining a substrate, does not involve a problem of blocking or the like at the time of winding after coating of a backside layer onto the substrate, can eliminate the need to provide a release layer on the protective layer region, and further can enhance glossiness of a print with a protective layer. The thermal transfer sheet comprises a substrate, a dye layer of at least one color and a thermally transferable protective layer provided in a face serial manner on one side of the substrate, a protective layer provided on a part of one side of the substrate, an easy-adhesion layer provided on the whole surface of the protective layer and the substrate, the dye layer being provided on the easy-adhesion layer in its region where the protective layer is not located on the underside of the easy-adhesion layer. The second invention is directed to a thermal transfer sheet which can cope with increased printing speed in the thermal transfer, can meet demands for the provision of thermally transferred images having high density and high quality, can prevent the occurrence of abnormal transfer, cockles, etc., and can improve sensitivity in transfer at the time of printing. The thermal transfer sheet according to the second invention comprises a substrate, a heat-resistant slip layer provided on one side of the substrate, and an adhesive layer and a dye layer provided in that order on the other side of the substrate, the adhesive layer comprising a polyvinylpyrrolidone resin. By virtue of this construction, the sensitivity in transfer can be significantly improved at the time of thermal transfer, and a high-density thermally transferred image can be provided without applying high energy.
本发明首先针对一种热转印薄膜,其成本不高以获得基材,不会在涂覆背面层后卷绕时出现阻塞等问题,可以消除在保护层区域上提供释放层的需要,并且可以提高带有保护层的印刷的光泽度。该热转印薄膜包括基材、至少一种颜色的染料层和热转移保护层,这些层依次在基材的一侧提供,保护层在基材的一侧的一部分上提供,易粘附层在保护层和基材的整个表面上提供,染料层在易粘附层的下侧,其保护层未位于易粘附层下侧的区域上提供。第二项发明针对一种热转印薄膜,它可以应对热转印的增加打印速度,满足提供高密度和高质量的热转移图像的需求,可以防止异常转移、起泡等现象,并可以提高打印时的转移灵敏度。该热转印薄膜包括基材、耐热滑层在基材的一侧提供,胶粘层和染料层依次在基材的另一侧提供,胶粘层包括聚乙烯吡咯烷酮树脂。由于这种结构,热转移时的转移灵敏度可以显著提高,并且可以在不施加高能量的情况下提供高密度的热转移图像。