| abstract |
PROBLEM TO BE SOLVED: To provide a package that is heat-sealed and that can be resealed only by pressure pressing with fingers without the need to make the heat seal resin layer of the bottom material and the lid material the same type To do. SOLUTION: In a package used as one of a lid or bottom material of a package, a surface resin layer (A), an adhesive resin layer (B), a release resin layer (C), and a heat seal resin layer (D) are sequentially provided. The layer (B) is composed of a layer composed mainly of a styrenic thermoplastic elastomer having a loss tangent peak temperature of −35 ° C. or higher, and the layer (D) is Vicat softened. It consists of a layer mainly composed of a polyethylene adhesive resin having a point of 70 to 100 ° C., a weight average molecular weight peak value of 160000 to 220,000, and a ratio of the weight average molecular weight to the number average molecular weight of 1.5 to 2.3. Packaging body. [Selection] Figure 1 |