| 摘要 |
PURPOSE:To improve the ununiformity and bonding strength of the surface of a polyester film by forming an underlayer contg. a styrene-acrylate copolymer, cellosolve and a compound having two or more epoxy groups by coating on the surface of the polyester film subjected to corona discharge. CONSTITUTION:The 1st component in an underlayer to be formed is an acrylate copolymer contg. styrene as a copolymerizable component. The 2nd component is cellosolve which is effective in reducing the film forming temp. of the styrene- acrylate copolymer. Cellosolve having >=160 deg.C b.p. such as butylcellosolve, dibutylcellosolve, phenylcellosolve or benzylcellosolve is added by 1-20wt%, preferably 2-10wt% of the amount of solid matter in the 1st component. The 3rd component is a compound having two or more epoxy groups such as (poly)ethylene glycol diglycidyl ether or (poly)propylene glycol glycidyl ether. |
