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    • 4. 发明申请
    • POROUS FILM FOR HEAT-SEALABLE BAG-CONSTITUTING MEMBER, HEAT-SEALABLE BAG-CONSTITUTING MEMBER AND DISPOSABLE BODY WARMER
    • 用于热密封袋组件的多孔膜,热封袋组件和可弃置的身体保温
    • US20100310854A1
    • 2010-12-09
    • US12735523
    • 2009-01-27
    • Hiroshi NagamiKaori Ohnishi
    • Hiroshi NagamiKaori Ohnishi
    • B32B3/26C08L23/06
    • A61F7/02A61F2007/0226C08J5/18C08J2323/06Y10T428/249981
    • A porous film for a heat-sealable bag-constituting member is prepared by stretching an unstretched film to be porous. The unstretched film includes an ultrahigh-molecular-weight polyethylene having a weight-average molecular weight of 30×104 to 250×104, a polyolefin component other than the ultrahigh-molecular-weight polyethylene, and an inorganic filler as essential components, and the content of the ultrahigh-molecular-weight polyethylene is 1 percent by weight or more based on the total amount of polymer components constituting the porous film. Even when produced by stretching at a low draw ratio, the film does not suffer from uneven stretching and shows high productivity. When the film is heat-sealed into a bag, the bag has a high seal strength and does not suffer from edge tear. The film is therefore useful particularly as a bag-constituting member to be heat-sealed into a bag typically as a disposable body warmer.
    • 通过拉伸未拉伸的多孔膜,制备可热封袋构成构件的多孔膜。 未拉伸膜包括重均分子量为30×104〜250×104的超高分子量聚乙烯,除了高分子量聚乙烯以外的聚烯烃成分和作为必要成分的无机填料, 基于构成多孔膜的聚合物成分的总量,超高分子量聚乙烯的含量为1重量%以上。 即使当以低拉伸比拉伸而制成时,该膜也不会受到不均匀拉伸的影响,并且生产率高。 当将薄膜热封成袋时,该袋具有高的密封强度并且不会遭受边缘撕裂。 因此,该膜特别是作为通常作为一次性体温加热器而热封在袋中的袋构成构件。