| 摘要 |
PROBLEM TO BE SOLVED: To provide a coating bar used, for example, when a release layer is formed on a polyester film to produce a release film and being capable of forming areas differing from the residual area in peeling force. SOLUTION: The coating bar has the form of a rod having in its effective coating width regions where the roughness of the surface of the bar is different by at least 1μm in terms of a centerline average roughness (Ra) are formed at definite intervals.
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