| 摘要 |
PROBLEM TO BE SOLVED: To obtain a good ink drying property, clearness of images, and surface glossiness by making use of a polyol consisting of a polyurethane elastomer with an ionen introduced in a molecule skeleton and a polyurethane elastomer obtained by reaction hardening polyisocyanate and a cross-linking agent. SOLUTION: A polyurethane elastomer is obtained by reaction hardening a polyol, a polyisocyanate, and a cross-linking agent, and a cationic structure exists in the molecule structure as a cross-linking agent. Thus, since the stable and uniform existence thereof is accomplished in comparison with the case where quaternary ammonium salt or the like is added as an additive, ink fasts therein more uniformly with the result that images become clear. Also, as required, various additives such as a dispersant, a reaction control agent, and an antifoaming agent can be added, and further an solvent liquid is used as an ink receptor layer to be coated on a base material and thereby manufactured by heating and drying operation. As such, images can be obtained with an excellent glossiness and coloring property and a high drying property combined thereto. |
