| 摘要 |
PURPOSE:To reduce thoroughly the friction coefft. of a thin film layer and the rear surface of a base body and to improve runnability by providing a back coating layer contg. a lubricating agent which is selected from a fluorine lubricating agent or aliphat. compd. having no compatibility with the lubricating agent incorporated into a top coating layer on the rear surface of a base body. CONSTITUTION:At least >=1 kind of lubricating agents which are selected from a fluorine lubricating agent or aliphat. compd. and have no compatibility with each other are used in combination for a top coating layer and a back coating layer. For example, tetrafluoroethylene, hexafluoropropylene, etc. are adequately used as the fluorine lubricating agent used in the top coating layer and back coating layer. The lubricating agents having no compatibility with each other are respectively used in combination in the stage of using said lubricating agents; for example, the aliphat. compd. such as satd. fatty acid or fatty acid ester is used for the back coating layer when the fluorine lubricating agent is used for the top coating layer and the fluorine lubricating agent is used for the back coating layer when the aliphat. compd. such as satd. fatty acid or fatty acid ester is used for the top coating layer. |
