| 摘要 |
PURPOSE:To keep an adhesion even on a surface to be bonded which is porous and has hydrophilic property such as a mouth part of a glass container, etc., by making a water repellent exist on a surface to be thermal bonded to the mouth part of an airtight packaging container. CONSTITUTION:For a lid material, on one surface of an aluminum foil 1, a heat sealing layer 2, which contains a water repellent, is provided through an adhesive layer 3, and on the surface to be thermal bonded to a mouth part 10 of an airtight packaging container such as a glass container, etc., a water repellent is made to exist. On the other surface of the aluminum foil 1, a corrosion protective coating layer 4 is applied. Also, for the lid material, on the surface to be thermal bonded to the mouth part 10 of a glass container, a water repellent may be made to exist by a method wherein on one surface of the aluminum foil 1, the heat sealing layer 2 is provided through the adhesive layer 3, and on the surface of this heat sealing layer 2, a coating layer 5 of a water repellent is applied. On the other surface of the aluminum foil 1, the corrosion protective coating layer 4 is applied in the same manner. |
