| 摘要 |
PURPOSE:To eliminate the coating defects of an under coating layer by specifying the viscosity of a coating compd. soln. for the under coating layer coated on a base to a specific value at the point of the time when said soln. attains prescribed surface tension. CONSTITUTION:The under coating layer consisting of an alcohol soluble resin (e.g.; 6/66/610/12 quaternary copolymer nylon) is formed between the conductive base and photosensitive layer. The soln. which has >=1,000cps soln. viscosity at the point of the time when the soln. is coated on the base and the surface tension of the soln. under drying attains equality to the critical surface tension (e.g., 25-35dyhe/cm) of the base surface is used as the coating compd. soln. for the base surface. Then, the under coating layer which has less coating defects such as runnaway and saq is obtd. and the image defects are decreased. |
