| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject film having excellent slipperiness under high- humidity condition while keeping the transparency and surface gloss of the film by forming protrusions having a specific size on a polyamide film surface at a specific density. SOLUTION: This polyamide film has a surface roughness characterized by the presence of 6-30/mm of protrusions having a height of >=0.06μm from the center line measured by a surface-roughness tester, a haze value of≃1.0% and a glass of >110. The film can be produced by compounding a polyamide resin with a surface-roughening substance, especially inorganic fine powder, concretely a gel-type silica, etc., forming the composition in the form of a film and drawing the film at an areal draw ratio of >=3. Preferably, >=50wt.% of the polyamide resin is a poly-ε-capramide or a copolymer containing the recurring structural unit of poly-ε-capramide as a main component.
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