LARGE-SIZED HIGHLY MOISTURE-PROOF BAG FOR HOUSING MOISTURE ABSORBENT CONTENT, AND ITS FORMING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a large-sized highly moisture-proof bag for housing a moisture absorbent content, wherein there is no fear for mixing in of foreign objects at the time of forming, and in addition, which is excellent in moisture- proofness, and its forming method. ;SOLUTION: This large-sized highly moisture-proof bag is constituted of a bag main body 14 made of a synthetic resin film which is formed into a tubular shape, and a covering external layer made of a highly moisture-proof raw material, which is formed in such a manner that a plurality of small laminated sheets 18a formed by laminating at least a polyolefin based film and an aluminum foil, are connected, and a laminated sheet 18 of a large area is formed, and the large-sized laminated sheet covers the whole body of the bag main body 14 in a manner to wrap the whole body while affixing the covering external layer to the external wall surface of the bag main body 14 with an adhesive 20, and the connected parts 18b between the small-sized laminated sheets in the large-sized laminated sheet 18, are formed by heat-sealing or hot melt welding.;COPYRIGHT: (C)1998,JPO