| 摘要 |
<p>A stretched polystyrene film produced from a styrene resin composition containing 70-100 wt.% of a highly syndiotactic styrene polymer and having a crystallinity of 35 % or above, a thickness nonuniformity of 8 % or less, and a dispersion of birefringence of at most 20 % per 1,000 cm2. The film is excellent in flatness and is reduced in deformation after being heated, such as warpage or surging.</p> |
