| 摘要 |
PURPOSE:To obtain a partially pressure sensitive paper which has a good retainability of the solution hereinafter stated by partially coating a paper with a fusible ink which contains a colorformer solution and microcapsules which have membrane made from aminoplablast and is separable from aqueous medium at the time of encapsulation. CONSTITUTION:A colorformer solution for a pressure sensitive paper is dispersed as a core matter in a hydrogen mixed liquid which contains melamine-formaldehyde prepolymer, melamin-thiourea formaldehyde prepolymer, etc. and water soluble cationic urea resin and anionic surface active agent. Then, the said disperse solution is polycondensated under the existence of an acid catalyst and encapsulated and is separated from aqueous medium and dried. Thence, the microcapsules are dispersed in a fusible suspending media (preferably-Japan wax, carnauba wax and etc.) and this ink is partially applied to a paper. |
