| 摘要 |
PROBLEM TO BE SOLVED: To obtain a release sheet of a low cost having better releasability from a film to be welded than the conventional one and showing a long life and a high quality.SOLUTION: The release sheet used for being arranged between the film to be welded and a heat seal bar in bag-making processing includes a core material 11 composed of a heat-resistant fabric or nonwoven fabric having a higher melting temperature than the film to be welded, and fluoro resin layers 12a and 12b formed on the surfaces of the core material 11. The release sheet has a ten-point average surface roughness Rz of not less than 35 to less than 120 μm. |
