Multi-layered sheet, container, packaged article being easy to unseal
AssigneeIdemitsu Unitech Co., Ltd.
InventorHiroyuki Takahashi
Life of this patent
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Abstract
A container 3 is manufactured by thermally forming a multi-layered sheet including a first substrate layer 11, an adhesive layer 12, a gas barrier layer 13, an adhesive layer 14, a second substrate layer 15, a cohesive failure resin layer 16, and a non-cohesive failure resin layer 17 in such a manner that the non-cohesive failure resin layer 17 is positioned on an inner surface side of the container. The non-cohesive failure resin layer 17 contains a polypropylene resin having a melting point of 140° C. or higher. The thickness of the non-cohesive failure resin layer 17 is in the range of 7 to 40 μm. A circular cut portion 35 is formed on the non-cohesive failure resin layer 17.
Claims14
A multi-layered sheet comprising:
- a substrate layer;
- a cohesive failure resin layer formed on the substrate layer and containing a polyolefin resin and a flexible resin or an elastomer;
- and
- a non-cohesive failure resin layer formed on the cohesive failure resin layer, wherein:
- the non-cohesive failure resin layer contains a polyolefin resin and has a thickness in the range of 7 to 40 μm.
A container comprising:
- a substrate layer;
- a cohesive failure resin layer formed on the substrate layer and containing a polyolefin resin and a flexible resin or an elastomer;
- and
- a non-cohesive failure resin layer formed on the cohesive failure resin layer and containing a polyolefin resin, wherein:
- the non-cohesive failure resin layer is positioned on an inner surface side of the container;
- and
- a circular cut portion is formed on the non-cohesive failure resin layer of the flange.
Dependencies are inferred from the claim text.