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ZIPPER TAPE, PACKING BAG WITH ZIPPER TAPE AND APPARATUS FOR PRODUCING PACKING BAG WITH ZIPPER TAPE
ZIPPER TAPE, PACKING BAG WITH ZIPPER TAPE AND APPARATUS FOR PRODUCING PACKING BAG WITH ZIPPER TAPE
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机译:拉链带,带拉链带的包装袋和用于生产带拉链带的包装袋的装置
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摘要
A zipper tape (1) includes a pair of a male member (11) and a female member (12) including engagement portions (10) and belt-like bases (13), (14) continued to the engagement portions (10). The belt-like base (14) includes a seal base (141) defined by widening the belt-like base (14) a larger width from the engagement portions (10) to a crosswise end (141C) of the belt-like base (14) than that of the belt-like base (13). A bond layer (51) and an easy-peel layer (52) are layered on a surface (141B) of the seal base (141) in side of the engagement portion and heat-fused to a bag body (20). The seal base (141) is formed of polypropylene. The bond layer (51) is formed of a mixture of polypropylene and low density polyethylene. The easy-peel layer (52) is formed of a mixture of low density polyethylene and polypropylene. A ratio of polypropylene in the easy-peel layer (52) is smaller than a ratio of polypropylene in the bond layer (51).
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