Patent ID: 7641837

Claim:
A method of manufacturing a rolled film having thereon a coated layer comprising the steps of: (i) preparing a long substrate film; (ii) conducting a first embossing treatment on a part of a width of the long substrate film along a longitudinal direction of the long substrate film; (iii) forming the coated layer on the long substrate film to form a long coated film; (iv) conducting a second embossing treatment on a part of the width of the long coated film along the longitudinal direction of the long coated film; (v) winding the long coated film to form the rolled film having thereon the coated layer; and (vi) heating the rolled film at a temperature of 50 to 150° C. for 1 to 30 days in a rolled state, wherein the first embossing treatment and the second embossing treatment each are conducted by pressing an embossing roll heated at a temperature of 150-300° C. on the film; and a second embossed portion is provided partly or totally overlapping with a first embossed portion.