| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an easily releasable film which has good sealing performance and easily releasing performance at an usual sealing condition and exhibits good sealing performance even in 'liquid-holding sealing'. SOLUTION: At least one side of the film is composed of a surface of a layer comprising a resin composition which contains a styrenic resin selected from a group consisting of a rubber-modified polystyrene and a polystyrene, an ethylene/unsaturated carboxylic ester copolymer of 120-1,700 pts.wt. per the styrenic resin of 100 pts.wt. and one or more tackifiers of 10-250 pts.wt. per the styrenic resin of 100 pts.wt. which is selected from an alicyclic hydrocarbon resin, terpene-based resin, rosins and aliphatic hydrocarbon resin and has a number average molecular weight of 1,500 or less as determined with GPC method.</p> |
