Multi-Layer Structure and Process for Production Thereof
    1.
    发明申请
    Multi-Layer Structure and Process for Production Thereof 审中-公开
    多层结构及其生产工艺

    公开(公告)号:US20080003390A1

    公开(公告)日:2008-01-03

    申请号:US11587981

    申请日:2005-04-27

    IPC分类号: B32B27/08 B29B7/00

    摘要: A multi-layer structure comprising a layer of an ethylene-vinyl alcohol copolymer (A), a layer of a carboxylic acid-modified polyolefin (B), a layer of a thermoplastic resin (C) having a solubility parameter of 11 or less, and a layer of a resin composition (E), wherein the resin composition (E) comprises an ethylene-vinyl alcohol copolymer (A), a carboxylic acid-modified polyolefin (B), a thermoplastic resin (C) and a thermoplastic resin (D) having at least one functional group selected from the group consisting of a boronic acid group and boron-containing groups capable of being converted into a boronic acid group in the presence of water, and the layer of an ethylene-vinyl alcohol copolymer (A) is laminated with the layer of a thermoplastic resin (C) or the layer of a resin composition (E) through the layer of a carboxylic acid-modified polyolefin (B). This provides a multi-layer structure which allows effective reuse of regrind and which is excellent in impact resistance and gas barrier properties.

    摘要翻译: 一种多层结构,其包含乙烯 - 乙烯醇共聚物(A),羧酸改性聚烯烃(B)层,溶解度参数为11以下的热塑性树脂(C)层, 和树脂组合物(E)层,其中树脂组合物(E)包含乙烯 - 乙烯醇共聚物(A),羧酸改性聚烯烃(B),热塑性树脂(C)和热塑性树脂( D)具有至少一种选自硼酸基团和能够在水存在下转化为硼酸基团的含硼基团的官能团,并且乙烯 - 乙烯醇共聚物(A )与热塑性树脂(C)层或树脂组合物(E)层通过羧酸改性聚烯烃(B)层层压。 这提供了多层结构,其允许有效地再利用回收物,并且其耐冲击性和阻气性优异。

    Resin composition of good long-run workability comprising ethylene-vinyl alcohol copolymer

    公开(公告)号:US20050096419A1

    公开(公告)日:2005-05-05

    申请号:US11000172

    申请日:2004-12-01

    摘要: Disclosed are a resin composition comprising an ethylene-vinyl alcohol copolymer and a multi-layered structure comprising the resin composition. The resin composition comprises an ethylene-vinyl alcohol copolymer, and is characterized in that, when it is heated in a nitrogen atmosphere at 220° C., its MFR (at 230° C. under a load of 10.9 kg) shows a minimum value within 10 hours after the start of heating it, and shows a maximum value (MFRmax) within 100 hours after showing its minimum value, that it contains from 0.05 to 4 μmols/g of a carboxylic acid (A), and that it satisfies the following formulae (1) and (2): 0.5≦MFRmax/MFR0≦45   (1) 0.1≦(a1)/(A)≦1.0   (2) wherein MFRmax indicates the maximum value of MFR (at 230° C. under a load of 10.9 kg) of the resin composition heated in a nitrogen atmosphere at 220° C.; MFR0 indicates MFR (at 230° C under a load of 10.9 kg) of the resin composition not heated; (A) indicates the total content (μmol/g) of the carboxylic acid (A) and its salt in the resin composition; (a1) indicates the content (μmol/g) of a carboxylic acid (a1) having a molecular weight of at least 75 and its salt in the resin composition. The resin composition has good interlayer adhesiveness when fabricated into laminates, and its moldings are yellowed little and have good appearances with few fish eyes (gels or hard spots) and streaks. While molded in melt, the resin composition ensures good long-run workability not smelling so much, and when recycled, it is yellowed little.