Casing material for pillow packaging and pillow package

Abstract

In a casing material, an adhesion layer containing CPP as a main component is laminated on one surface of a biaxially-oriented nylon film and a protection layer is laminated on the other surface of the biaxially-oriented nylon film, the protection layer being formed of a specific resin (e.g., PVDC). Accordingly, a seal strength of the adhesion layer can be increased and strength such as impact resistance can be improved. Consequently, by forming adhesion portions of the pillow package using the adhesion layer, an easily openable and highly strong pillow package can be obtained without using a metal clip. Moreover, since the protection layer is formed of the specific resin such as the PVDC resin, heat resistance and strength are excellent. Accordingly, the biaxially-oriented nylon film is protectable in a retort process by high-temperature water, so that breakage of the package and the like is preventable.

Dependencies are inferred from the claim text.