| 摘要 |
PROBLEM TO BE SOLVED: To minimize influence of a setting error of an initial roller reference point by making a ratio of a variation of thickness of a coating film against a variation of a pressing quantity between an applicator roller and a pick-up roller smaller than a specific value. SOLUTION: In a roll coater, the thickness of a coating film formed on a belt-like body 5 by coating is decided by viscosity of the coating film, a carrier speed of the belt-like body 5, a circumferential speed ratio between an applicator roller 3 and a pick-up roller 2 against the carrier speed, thickness of an elastic material and the elastic modulus on the applicator roller 3 and a pressing quantity between the rollers 2, 3 etc. A sensitivityΔt/Δδof a variationΔt (μm) of the thickness of the coating film against a variationΔδ(mm) of the pressing quantity between the rollers 2, 3 is made smaller than 20μm/mm. By coating within this region, deviation of the thickness of the coating film due to the initial setting error indispensably contained in the pressing quantity between the roller 2, 3 and the setting error of the pressing quantity, can be restrained.
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