| 摘要 |
PROBLEM TO BE SOLVED: To carry out stable simultaneous multilayer coating without coating failure by preventing deterioration and gelation of coating liquids and bubble generation even in the case that a plurality of coating liquids each having a different characteristic to temperature are supplied to the same coating head at different feed temperatures according to their characteristics. SOLUTION: In this simultaneous multilayer coating method, a plurality of the coating liquids each having a different characteristic to temperature are supplied to the same coating head 20 at different temperatures according to their characteristics, and a plurality of the coating liquids are discharged from the coating head 20 to a traveling web to simultaneously multilayer-coat the web. Assuming that a coating liquid whose feed temperature is highest among a plurality of the coating liquids, its feed temperature, and its discharge temperature are (a), Tain and Taout respectively, and that a coating liquid whose feed temperature is lowest among a plurality of the coating liquids, its feed temperature, and its discharge temperature are (b), Tbin and Tbout respectively, simultaneous multilayer coating with a plurality of the coating liquids is carried out under a condition satisfying following expressions, 0 deg.C<Tain -Taout <10 deg.C and 0 deg.C<Tbout -Tbin <10 deg.C. |
