| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal film improved in sealing strength, sealability, easy openability and oil resistance while keeping a good balance among them, a cover material using this seal film and a container using this cover material. SOLUTION: A seal film made from a polystyrene resin composition comprising 100 pts.wt. polystyrene resin and above 10 to 250 pts.wt. polymer having a solubility parameter (SP) of 8.45-8.70 and freed from any aromatic vinyl units, a cover material having a seal layer made of this film and a container having a cover made of this cover material are provided. |
