| 摘要 |
<P>PROBLEM TO BE SOLVED: To lengthen a lifetime of a film body and a multiple film structure using the film body even if an outer edge of a belt-like film material group belonging to the film body is folded back and heat-welded in order to improve the strength of the outer edge of the film body. <P>SOLUTION: A film body 8 has a plurality of band-like film materials 12 that are placed in parallel along one-direction A. Opposed edge parts 13 and 13 of the band-like film materials 12 and 12 adjacent to each other are overlapped with each other and subjected to heat-welding W1. An outer edge part 17 of a band-like film material 12 group in a longitudinal direction B of each band-like film material 12 has a base part side 17a to which an end edge side 17b is folded back, and the base part side 17a and the end edge side 17b are subjected to heat-welding W2. An opening 26 is formed at an overlapped part of both the opposed edge parts 13 and 13 and the end edge side 17b in the base part side 17a. <P>COPYRIGHT: (C)2012,JPO&INPIT |
