| 摘要 |
PROBLEM TO BE SOLVED: To improve a shock absorbing effect and durability of a bag-shaped body by a method wherein adhesive portions at peripheral edge parts of the airtight bag-shaped body, to which a breaking force and vibration are most applied and which may be repeatedly bent, are made tough so as to prevent damage or breaking from occurring. SOLUTION: This substantially hollow bag-shaped body is formed in such a way that two bag walls 5, each being composed of a plurality of layers, in which an outer layer 3 comprising a sheet-like base material 1 such as a sheet and a laminated layer 2 having thermal adhesive properties and an inner layer 4 made of a thermal adhesive synthetic resin sheet are superposed on each other so as to bring the laminated layer 2 into contact with the inner layer 4, are superposed on each other so that the inner layers 4 of the respective bag walls 5 are opposed to each other, and that peripheral edge parts of the bag walls 5 are airtightly heat-sealed together. In this bag-shaped body, a non-adhesive portion where the outer layer 3 and the inner layer 4 of each bag wall 5 are not bonded together is provided inside a heat sealing zone 7 where all of the outer layers 3 and the inner layers 4 of the two bag walls 5 superposed on each other along the peripheral edge parts are integrally heat-joined together, and the outer layer 3 and the inner layer 4 of each bag wall 5 in the inside of the heat sealing zone 7 are separately heat-joined together in an alignment sealing zone 8, respectively. |
