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    • 6. 发明申请
    • MULTILAYER STRUCTURES AND ARTICLES COMPRISING THE SAME
    • 多层结构和包含该结构的文章
    • WO2017000339A1
    • 2017-01-05
    • PCT/CN2015/085647
    • 2015-07-31
    • DOW GLOBAL TECHNOLOGIES LLCYUN, XiaobingPAN, JianpingWANG, Gang
    • YUN, XiaobingPAN, JianpingWANG, Gang
    • B32B27/30B29C55/12
    • B32B27/32B29C47/0004B29C47/0021B29C47/0057B29C47/065B29C55/06B29C55/12B29C55/28B32B7/04B32B7/12B32B27/08B32B27/304B32B27/308B32B27/327B32B27/36B32B2274/00B32B2307/31B32B2307/518B32B2307/54B32B2307/72B32B2307/732B32B2553/00
    • Embodiments of the present invention relate to multilayer structures and articles formed therefrom. In one aspect, a multilayer structure comprises (a) a biaxially oriented polyethylene film comprising a linear low density polyethylene having a density of 0.910 to 0.940 g/cm 3 , wherein the ultimate elongation in the machine direction of the biaxially oriented polyethylene film is at least 2 times greater than the ultimate elongation in the cross direction, and wherein the ultimate tensile strength of the biaxially oriented polyethylene film is at least 60 MPa in at least one of the machine direction and the cross direction; (b) an adhesive layer; and (c) a sealant film, wherein the ultimate elongation of the sealant film is at least 300%in at least one of the machine direction and the cross direction, wherein the ultimate tensile strength of the sealant film is less than 50 MPa in at least one of the machine direction and the cross direction, and wherein the sealant film has a heat seal initiation temperature of 105℃or less; wherein the sealant film is laminated to the biaxially oriented polyethylene film by the adhesive. In some embodiments, the sealant film comprises at least one layer comprising at least 30 percent by weight of a polyolefin plastomer, a polyolefin elastomer, an ultra low density polyethylene, an ethylene acetate copolymer, an ethylene acrylic acid copolymer, or an ethylene acrylate copolymer.
    • 本发明的实施例涉及由其形成的多层结构和制品。 一方面,多层结构包括(a)双轴取向的聚乙烯膜,其包含密度为0.910至0.940g / cm 3的线性低密度聚乙烯,其中双轴取向聚乙烯膜的机器方向的极限伸长率至少为 在横向上的极限伸长率大2倍,双轴取向聚乙烯膜的极限拉伸强度在纵向和横向的至少一个方向上至少为60MPa。 (b)粘合层; 和(c)密封膜,其中在机器方向和横向方向中的至少一个方面,密封膜的极限伸长率至少为300%,其中密封膜的极限拉伸强度小于50MPa 机器方向和横向方向中的至少一个,并且其中密封膜的热封起始温度为105℃以下; 其中通过粘合剂将密封膜层压到双轴取向的聚乙烯膜上。 在一些实施方案中,密封剂膜包括至少一层,其包含至少30重量%的聚烯烃塑性体,聚烯烃弹性体,超低密度聚乙烯,乙酸乙烯酯共聚物,乙烯丙烯酸共聚物或乙烯丙烯酸酯共聚物 。