| 摘要 |
The press-through package of the invention has a covering material composed of a stretched film including at least one layer, the layer comprising a thermoplastic resin including at least one selected from the group consisting of styrene-acrylic acid copolymer resins, styrene-methacrylic acid copolymer resins, styrene-maleic anhydride copolymer resins and terpolymer resins comprising one of these three copolymer resins and an ester component, and an inorganic filler at less than 5 parts by weight with respect to 100 parts by weight of the thermoplastic resin. |
