| 摘要 |
PROBLEM TO BE SOLVED: To enhance physical stability and moisture resistance at high temperature and high humidity as well as a hydrophilic property by laminating or coating a water ink absorptive layer being blended with inorganic or organic ultrafine particles and/or a filler in high molecular weight polydioxolane and/or cationic surface active agent on at least one surface of a bace layer. SOLUTION: A sheet being a base layer is formed by blending a white inorganic pigment in a polyester resin comprising, e.g. a carboxylic acid component and a diol component. The water ink absorptive layer has a cationic property in such that high molecular weight polydioxolane and polymeric cationic surface active agent are entangled in polymerized relation. Water ink, when printing is carried out generally with the use of an anionic dye by means of an ink jet printer or the like, forms a high molecular weight ink layer where high molecular weight polydioxolane and anionic dye each given a cationic properly are combined firmly through the agency of an electrical interaction, so that the shift of dye is restrained even at high temperature and high humidity, thereby precluding the occurrence of a stain or the like of water ink and improving the water resistance. |
