| 摘要 |
PURPOSE:To provide a packaging film excellent in transparency and gas permeability, and also good in travelability and shaving resistance. CONSTITUTION:The objective packaging film consisting of a styrenic polymer essentially having syndiotactic configuration. This film has the following characteristics: (1) the three-dimensional surface roughness (SRa) on one side or both sides is 0.01-0.1mum and (2) the number of projections (PCC value) per unit area at the central surface of roughness is <=(2000XSRa2500). |
