Idemitsu Unitech Co., Ltd.

Toshiya Sato

In manufacturing an easy-open container (), a flange () of a container body () and a lid () are heat-sealed, where a circular sealing board () having a curved surface on an inner circumferential edge and an inclined surface on an outer circumferential edge side is pressed onto an upper side of the flange () to form a swelling gathered resin part () formed of respective resin components of a surface layer () of the container body (), a subsurface layer () adjacent to the surface layer () and a seal layer () of the lid (), while heat-sealing the surface layer () of the container body () and the seal layer () of the lid (). With the arrangement, the easy-open container () having both a high sealing performance and an easy-open performance can be provided with low cost.

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Sodegaura, Japan

Toshiya Sato