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    • 65. 发明公开
    • MULTILAYERED PELLET COMPRISING ETHYLENE/VINYL ALCOHOL COPOLYMER RESIN COMPOSITIONS
    • 乙二醇乙二醇/乙烯醇共聚物
    • EP1785446A1
    • 2007-05-16
    • EP05778514.9
    • 2005-09-02
    • KURARAY CO., LTD.
    • KAWAMURA, Syukiti
    • C08J3/12B29B9/12B29K29/00C08L29/04
    • C08L23/0861B29B9/12C08J3/126C08J2323/08C08J2329/04C08J2423/08C08L29/04C08L2205/02C08L2205/03C08L2207/53Y10T428/2991Y10T428/2993Y10T428/2995Y10T428/2996Y10T428/2998C08L2666/04
    • The present invention provides a multilayered pellet having a core-shell structure, wherein the core of the core-shell structure is made of an ethylene-vinyl alcohol copolymer resin composition (A), and the shell of the core-shell structure is made of an ethylene-vinyl alcohol copolymer resin composition (B). The ethylene-vinyl alcohol copolymer resin composition (A) constituting the multilayered pellet contains any one of (i) to (iii): (i) an ethylene-vinyl alcohol copolymer (a) and a modified ethylene-vinyl alcohol copolymer (b); (ii) a modified ethylene-vinyl alcohol copolymer (b); and (iii) an ethylene-vinyl alcohol copolymer (a) and a plasticizer (d). The modified ethylene-vinyl alcohol copolymer (b) is preferably a modified ethylene-vinyl alcohol copolymer having a predetermined unit or a modified ethylene-vinyl alcohol copolymer obtained by reacting the ethylene-vinyl alcohol copolymer (a) and a monovalent epoxy compound (c) having a molecular weight of not greater than 500. Difference of the heat sealing temperature (TA) of the ethylene-vinyl alcohol copolymer resin composition (A) and the heat sealing temperature (TB) of the ethylene-vinyl alcohol copolymer composition (B) is in the range of 3 °C to 100°C.
    • 本发明提供一种具有核 - 壳结构的多层颗粒,其中核 - 壳结构的芯由乙烯 - 乙烯醇共聚物树脂组合物(A)制成,核 - 壳结构的壳由 乙烯 - 乙烯醇共聚物树脂组合物(B)。 构成多层粒料的乙烯 - 乙烯醇共聚物树脂组合物(A)含有(i)〜(iii)中任一项:(i)乙烯 - 乙烯醇共聚物(a)和改性乙烯 - 乙烯醇共聚物(b) ; (ii)改性乙烯 - 乙烯醇共聚物(b); 和(iii)乙烯 - 乙烯醇共聚物(a)和增塑剂(d)。 改性乙烯 - 乙烯醇共聚物(b)优选为具有预定单元的改性乙烯 - 乙烯醇共聚物或乙烯 - 乙烯醇共聚物(a)与一价环氧化合物(c)反应得到的改性乙烯 - 乙烯醇共聚物 )乙烯 - 乙烯醇共聚物树脂组合物(A)的热封温度(TA)和乙烯 - 乙烯醇共聚物组合物(B)的热封温度(TB)的差异 )在3℃至100℃的范围内。