Packaging bag
    2.
    发明授权
    Packaging bag 失效
    包装袋

    公开(公告)号:US4565720A

    公开(公告)日:1986-01-21

    申请号:US517765

    申请日:1983-07-27

    IPC分类号: B32B27/32 B65D30/08 B32B7/02

    摘要: A packaging bag either of two layer structure comprising an outer layer and an inner layer or of three layer structure comprising an outer layer, an intermediate layer, and an outer layer is disclosed, wherein the outer layer is made of a low density ethylene-based polymer or a mixture of said ethylene-based polymer and an ethylene-vinyl acetate copolymer, and the inner or intermediate layer is made of a mixture of high density polyethylene and an ethylene-.alpha.-olefin copolymer. The packaging bag of this invention is much superior in film puncture strength, tear strength, etc. to conventional bags and moreover shows very high seal strength and low temperature impact resistance. Thus, the packaging bag of this invention is suitable for storage and conveyance of heavy materials, particularly angular heavy materials such as fowl. Moreover, the packaging bag has good anti-block properties and thus is suitable for automatic packaging.

    摘要翻译: 公开了包括外层和内层的两层结构的包装袋或包含外层,中间层和外层的三层结构的包装袋,其中外层由低密度乙烯基 聚合物或所述基于乙烯的聚合物和乙烯 - 乙酸乙烯酯共聚物的混合物,并且内层或中间层由高密度聚乙烯和乙烯-α-烯烃共聚物的混合物制成。 本发明的包装袋在常规袋中的膜穿刺强度,撕裂强度等方面优异,并且还显示出非常高的密封强度和耐低温冲击性。 因此,本发明的包装袋适用于重质材料,特别是有角重物质如家禽的储存和输送。 此外,包装袋具有良好的防块性,因此适用于自动包装。