| 摘要 |
PURPOSE: To mainly improve durability and elasticity of coating agent composition and no carbon copying sheet by incorporating specific ratios of a pigment image developing component containing a pigment and an acid developer, a binding agent containing a plurality of binders and a pH regulator. CONSTITUTION: The coating agent composition for a no carbon copying sheet comprises a specific pigment image developing component, a binding agent and a pH regulator. The developing component contains 70 to 90 dry pts.wt. of a pigment and 10 to 30 dry pts.wt. acid developer. The binding agent contains 4 to 25 pts.wt. of a latex binder to 100 dry pts.wt. of the developing component, and 20 pts.wt. or below of a starch binder. Further, the regulator is set to an effective amount to regulate pH to 7 to 9. The composition is applied to the no carbon copying sheet to be printed with information to be read by a magnetic image. Thus, durability and elasticity are mainly improved. |
