| 摘要 |
PROBLEM TO BE SOLVED: To suppress the petroleum resource exhaustion by making it possible to utilize a reproduced film which is manufactured from a pulverent of recovered beverage containers as an envelope body which satisfies various kinds of conditions. SOLUTION: The envelope body 2 is constituted of a see-through film made of a reproduced polyethylene terephthalate resin of which the material is the pulverent alone of used beverage containers made of the polyethylene terephthalate resin which has been sort-recovered. COPYRIGHT: (C)2005,JPO&NCIPI
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