| 摘要 |
PROBLEM TO BE SOLVED: To provide an easily adhesive stretched film syndiotactic polystyrene which shows excellent adhesive properties between the film and an adhesiveness modified layer and has excellent economical efficiency, recycling properties and environmental adaptability during manufacturing. SOLUTION: The adhesiveness modified layer formed of a water dispersible straight-chain polyester which satisfies the requirements (a), is laminated on at least one side of the stretched film composed of a styrene polymer of a syndiotactic structure. (a) The ratio of B/(A+B) calculated based on the integrated value A of a proton with a chemical shift of 1.0 to 6.0 ppm as measured by the proton nuclear magnetic resonance (NMR) and the integrated value B of a proton with a chemical shift of 7.0 to 9.0 ppm, is 0.07 to 0.25. Especially, the adhesiveness modified layer is preferably formed by applying an aqueous copolymer polyester dispersion to an unstretched film or a uniaxially stretched film, and uniaxially or biaxially orienting the coated film once or more before thermally treating it. COPYRIGHT: (C)2004,JPO |
