Easily-openable packaging container

摘要

A multilayer container having a flange portion and an easily-openable packaging container packaged by using the multilayer container, wherein the interlaminar strength of the multilayer container is smaller than the peeling strength between the flange portion and the lid member, and a ring notch is provided to an inner surface layer of the flange portion inside a heat seal portion. The packaging container has both a good sealing property and an easy openability and has an excellent resistance to boiling and a retort treatment, and peeled surface has a good appearance. A method for producing the multilayer container and a method for producing the packaging container, and an apparatus to be used for producing the multilayer container, and a method for filling and packaging, and an apparatus for filling and packaging are disclosed.