| 摘要 |
PROBLEM TO BE SOLVED: To prevent the ink transfer failure at a high temperature and high humidity by laminating a plurality of oriented films each containing an inorganic fine power of propylene resin having a specific wt.%, a specific surface area and a mean particle size and having many fine pores, coating the front and rear surfaces with water soluble primers and laminating pulp sheets thereon. SOLUTION: The surface layer B of an oriented film containing 35 to 65wt.% of an inorganic fine powder of propylene resin having specific surface area of 250000 to 300000cm<2> /g and the mean particle size of 0.07 to 0.9μm as the transfer surface of a molten ink is laminated on the front surface of a base material layer A in the film obtained by orienting the resin film containing 5 to 35wt.% of the inorganic fine powder which contains 65 to 96wt.% of propylene resin and having specific surface area of 10,000 to 40,000cm<2> /g and the mean particle size of 0.5 to 2.3μ and having many fine pores, and a rear surface layer C made of an oriented film is also laminated on the rear surface. The front and rear surface layers B, C are coated with a water solution of a nitrogen polymer compound containing the composition ratio of 100 pts.wt. of an acrylic polymer, 20 to 300 pts.wt. of polyethylene and 20 to 300 pts.wt. of an epichlorohydrin addition product, and driven to form primer layers (IIa, IIb). |
