| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a styrene-based film, which is used as a film for pasting together plastic sheet substrates used for food container etc., whose draw processing is easy, and is nearly free from trouble of film breaking during such after-processing as printing, laminating, vapor deposition, molding etc. <P>SOLUTION: The styrene-based film is a film whose stretch-breaking elongation degree both in length and width directions is at least 40%, desirably at least 60%, and is obtained by mixing polystyrene (a) with a styrene-based copolymer (b) having the vicat softening temperature of not more than 90°C in a ratio of (a):(b)=90:10 to 10:90, by molding the mixture in a shape of film, which is solidified then stretched 3 to 7 times in both directions of length and width while heating at a temperature 0-40°C higher than the vicat softening temperature of polystyrene (a). <P>COPYRIGHT: (C)2012,JPO&INPIT |
