| 摘要 |
PURPOSE:To provide a heat-sealable lid material for a container for sealed packaging, the adherent force of which under a water environment does hot decline much, and therefore, the water resistance of which greatly increases, which has an excellent sealing property, and in addition, which can be easily opened by an appropriate force, and is equipped with both functions of water resistant adhesiveness and easy peelability. CONSTITUTION:This lid material for a container for sealed packaging, a heat- sensitive adhesive layer 2, which contains 55-99 pts.wt. of a heat-sensitive adhesive resin of which the major component is a monoolefin-unsaturated carboxylic acid copolymer, or its salt, or a monoolefin-unsaturated carboxylic acid ester copolymer, 1-45 pts.wt. of rosin, and 0.1-30 pts.wt. of a higher fatty acid, is provided on one surface of a metal foil 1. For this reason, the material has favorable adhesive properties even to a surface-to-be-attached which is porous and has hydrophilic nature such as the mouth part of a glass container, etc., and in addition, even when the content is a liquid or viscous body, entering of water to the adhesive interface can be effectively prevented from happening. |
