| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated film for minute boring which is excellent in boring process aptitude and boring accuracy even when a plastic film to be bored is thin, or initial tensile stress is weak and can smoothly obtain a bored film without the adhesion of a contaminant such as an adhesive and a method for producing the bored film using the laminated film. SOLUTION: A substrate sheet is laminated on at least one side of the plastic film to be bored whose initial tensile stress per 15 mm width is 1.0 N/% or below through an adhesive layer easily soluble in water to make the laminated film for minute boring whose initial tensile stress per 15 mm width is at least 1.2 N/%. After boring is carried out in a state of the laminated film, an aqueous solvent is acted on the adhesive layer, the adhesive layer is dissolved, and a bored film layer is isolated. COPYRIGHT: (C)2007,JPO&INPIT
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