| 摘要 |
PROBLEM TO BE SOLVED: To provide a wet film laminated sheet that is a laminated film manufactured by laminating a urethane porous layer to a polyester film and in which high surface accuracy is obtained without a process in which the urethane film is peeled once from the polyester film and is stuck to another polyester film, and an abrasive pad using it. SOLUTION: On at least one surface of a longitudinally oriented film of a polyester in which 70 mol% or more of an acid component consists of terephthalic acid and/or naphthalene dicarboxylic acid, a readily adhesive aqueous coating liquid comprising 99-80 wt.% of a polyester resin having a second order transition temperature of 20-150°C and 1-20 wt.% of a fine particle having a mean particle diameter of 0.01-0.1μm is applied so as to form a final coating thickness of 0.005-0.03μm. The coated polyester film is dried and oriented transversely, then reoriented in the longitudinal direction and reoriented transversely, if necessary, and then is set by heating. On the coated surface of the resultant polyester film having a coefficient of friction of 0.42-0.44, the urethane porous layer is formed by a wet coagulation method to form the wet film laminated sheet. COPYRIGHT: (C)2004,JPO |
