| 摘要 |
PURPOSE: To provide a film for a paperless thermal stencil printing base sheet which has excellent punch sensitivity and curl resistance, and has excellent resolution and density of an image at the time of printing. CONSTITUTION: A film for a paperless thermal stencil printing base sheet comprises a biaxially oriented film made of polyester resin having a melting point of 150 to 240 deg.C and a thickness of 1 to 30μm to simultaneously satisfy the formulae (1) to (4). S<=10... (1). F<=150... (2). 10<=S×F<=1500... (3). 0.02<=Ra<=0.3... (4). [in the formulae, S is heating shrinkage factor (5) of the film after treated for 10min at 100 deg.C, F is heating shrinkage stress (g/mm<2> ) of the film after it is treated at 100 deg.C for 10sec, and Ra is the center line average height (μm) on the surface of the film].
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