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    • 7. 发明授权
    • Thermoformable multilayer film and thermoformed container
    • 可热成型多层膜和热成型容器
    • US5972447A
    • 1999-10-26
    • US927266
    • 1997-09-11
    • Nobihiro HataHiroyuki Shimo
    • Nobihiro HataHiroyuki Shimo
    • B32B27/08C08L23/08C08L29/04B32B27/30B32B1/02B65D1/22
    • C08L23/08B32B27/08C08L29/04Y10T428/1352Y10T428/1379Y10T428/1383Y10T428/2495Y10T428/24967Y10T428/3175Y10T428/3192
    • Disclosed herein is a thermoformable film or sheet superior in gas barrier properties, mechanical properties, and appearance, a thermoformed container produced therefrom, and a resin composition suitable therefor. A thermoformable multilayer film with a total thickness of 50-300 .mu.m, comprising a layer of a resin composition with a thickness of 3-50 .mu.m, said resin composition comprising 60-99 wt % of ethylene-vinyl alcohol copolymer and 40-1 wt % of ethylene-(meth)acrylic acid copolymer, said ethylene-(meth)acrylic acid copolymer being dispersed in the form of particles in the matrix of said ethylene-vinyl alcohol copolymer, wherein said ethylene-vinyl alcohol copolymer having an ethylene content of 20-60 mol % and a degree of hydrolysis of not less than than 90%, and said ethylene-(meth)acrylic acid copolymer containing 1-30 wt % of (meth)acrylic acid.The EVOH may be a mixture of more than one kind of EVOH differing in ethylene content. The resin composition may contain each component dispersed in a specific manner.
    • 本文公开了一种耐气体阻隔性,机械性能和外观优异的热成型膜或由其制备的热成型容器以及适于其的树脂组合物。 一种总厚度为50-300μm的可热成型多层膜,包括厚度为3-50μm的树脂组合物层,所述树脂组合物包含60-99wt%的乙烯 - 乙烯醇共聚物和40-99wt% 1重量%的乙烯 - (甲基)丙烯酸共聚物,所述乙烯 - (甲基)丙烯酸共聚物以所述乙烯 - 乙烯醇共聚物的基体中的颗粒形式分散,其中所述乙烯 - 乙烯醇共聚物具有乙烯 含量为20-60摩尔%,水解度不低于90%,所述乙烯 - (甲基)丙烯酸共聚物含有1-30重量%的(甲基)丙烯酸。 EVOH可以是不同于乙烯含量的多种EVOH的混合物。 树脂组合物可以含有以特定方式分散的各成分。
    • 8. 发明授权
    • Process for producing pellet of ethylene/vinyl alcohol copolymer
    • 制备乙烯/乙烯醇共聚物颗粒的方法
    • US08163212B2
    • 2012-04-24
    • US10521468
    • 2003-07-14
    • Naohiko UchiumiNoriyuki KidaHiroyuki ShimoKaoru Ikeda
    • Naohiko UchiumiNoriyuki KidaHiroyuki ShimoKaoru Ikeda
    • B29B9/06
    • C08J3/12B29B9/06B29B9/065B29B9/16B29C2791/001C08J3/14C08J2329/08
    • The present invention provides a process for producing pellet of EVOH comprising the steps of introducing an EVOH solution containing alcohol into an apparatus, contacting the solution with water in the apparatus to let out the alcohol with water and then letting out an EVOH hydrous composition from the above-mentioned apparatus (step 1); cutting the EVOH hydrous composition let out therefrom to obtain EVOH hydrous composition pellets (step 2); introducing the obtained EVOH hydrous composition pellets into a dryer to reduce a water content thereof (step 3); melt-kneading the pellets, whose water content is reduced, in an extruder (step 4); and cutting EVOH discharged from the extruder to obtain the pellet of EVOH (step 5). Thus, the EVOH hydrous composition obtained by removing alcohol without deteriorating the environment can be efficiently dried, and pellets having less thermal degradation in drying and a uniform shape can be obtained.
    • 本发明提供了一种制备EVOH颗粒的方法,包括以下步骤:将含有醇的EVOH溶液引入设备中,使该溶液与设备中的水接触,以便用水排出酒精,然后从其中提取出EVOH含水组合物 上述装置(步骤1); 从中排出EVOH含水组合物,得到EVOH含水组合物颗粒(步骤2); 将获得的EVOH含水组合物颗粒引入干燥器中以降低其含水量(步骤3); 在挤出机中熔融捏合含水量降低的颗粒(步骤4); 并从挤出机中排出EVOH以获得EVOH颗粒(步骤5)。 因此,可以有效地干燥除去醇而不使环境恶化得到的EVOH含水组合物,并且可以获得干燥热降低和均匀形状的颗粒。