| 摘要 |
PURPOSE:To obtain the title film having good electrical characteristics and heat resistance, excellent traveling characteristics and abrasion resistance, and good handleability regardless of film thickness. CONSTITUTION:The film is made from a styrene polymer having a substantially syndiotactic configuration and has an internal haze (per 10mum) of at most 10%, a heat shrinkage at 200 deg.C of at most 5%, a three-dimensional surface roughness SDELTAa of 0.004 to 0.04 at least on one side and an air escape rate of at most 900 sec. |
