| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an easily unsealable film which causes no delamination even if contents contain a volatile drug component, has a wide application range of heat seal temperature, is easily unsealable in being peeled, and can be preferably used for a lid material of a container, a bag, or the like, and to provide a lid material and a package bag using the same. <P>SOLUTION: The easily unsealable film, in which a heat seal layer, an adhesive resin layer, and a base material layer are laminated, mainly includes the heat seal layer which is a mixture of 10-55 mass% amorphous polyethylene terephthalate-based polymer with 45-90 mass% polybutylene terephthalate homopolymer, or a mixture of 0-55 mass% amorphous polyethylene terephthalate-based polymer and 45-100 mass% polybutylene terephthalate-based copolymer obtained by using terephthalic acid and isophthalic acid as a dicarboxylic acid component, or a single resin, and the adhesive resin layer which is composed mainly of acid modification polyolefin. <P>COPYRIGHT: (C)2011,JPO&INPIT |
