| 摘要 |
PROBLEM TO BE SOLVED: To provide a package body which has adequate low-temperature sealability (impurity sealability and hot tack properties) even when a heat seal resin layer of a bottom material and a lid material is a propylene resin, and can be resealed by only pressure-crimping due to a finger.SOLUTION: There is a package body which is a multilayer film formed by sequentially laminating a surface resin layer (A), an adhesive resin layer (B), a peelable resin layer (C), and a heat seal resin layer (D). The layer (B) is formed of a layer containing a styrene-based thermoplastic elastomer having a loss tangent peak temperature of -35°C or higher as a main component. The layer (D) is formed of a layer containing a random polypropylene-based adhesive resin having a Vicat softening point of 80°C or higher and 105°C or lower, a peak value of a weight average molecular weight of 400,000 or more and 500,000 or less, and a ratio between the weight average molecular weight and a number average molecular weight of 1.5 or more and 2.3 or less, as a main component.SELECTED DRAWING: Figure 1 |
