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    • 9. 发明授权
    • Film formed from polyethylene-2,6-naphthalate resin, process for
producing said film and package using said film
    • 由聚2,6-萘二甲酸乙二醇酯树脂形成的膜,使用所述膜制造所述膜和包装的方法
    • US5990248A
    • 1999-11-23
    • US149656
    • 1998-09-09
    • Shinichiro MoriKatsuhiko SasadaKayo HasegawaYasuhiro HaradaChikao KumakiMasahisa YamaguchiYasuki SuzuuraRikiya YamashitaToshiyuki SuzukiIsao Inoue
    • Shinichiro MoriKatsuhiko SasadaKayo HasegawaYasuhiro HaradaChikao KumakiMasahisa YamaguchiYasuki SuzuuraRikiya YamashitaToshiyuki SuzukiIsao Inoue
    • B29C55/00B32B27/08B32B27/36C08G63/20C08J5/18C08L67/02C08F20/00
    • C08J5/18B29C55/005B32B27/08B32B27/36C08G63/20C08L67/02B29K2067/00C08J2367/02Y10S428/91Y10T428/1379Y10T428/1383Y10T428/24802Y10T428/24843Y10T428/266Y10T428/269Y10T428/28Y10T428/2817Y10T428/31786
    • The present invention relates to a polyethylene-2,6-naphthalate film comprising a resin composed mainly of polyethylene-2,6-naphthalate and having an intrinsic viscosity .eta. in the range of from 0.31 to 0.6, said film having stretch ratios of 1 to 3 times and 1 to 3 times or 3 to 6 times and 1 to 1.8 times respectively in substantially mutually perpendicular directions and a thickness in the range of from 5 to 150 .mu.m;a polyethylene-2,6-naphthalate resin comprising a blend composed mainly of two components of: a polyethylene-2,6-naphthalate resin having an intrinsic viscosity in the range of from 0.3 to 0.5 dl/g and prepared by an esterification reaction of a dicarboxylic acid having a 2,6-naphthalenedicarboxylic acid content of not less than 90% by mole with a glycol having an ethylene glycol content of not less than 90% by mole, or a transesterification and a polyethylene-2,6-naphthalate resin having an intrinsic viscosity in the range of from 0.5 to 0.7 dl/g and prepared by an esterification reaction of a dicarboxylic acid having a 2,6-naphthalenedicarboxylic acid content of not less than 90% by mole with a glycol having an ethylene glycol content of not less than 90% by mole, or a transesterification, the resin blend having an intrinsic viscosity in the range of from 0.31 to 0.68 dl/g;a modified polyethylene-2,6-naphthalate resin prepared by an esterification reaction of a dicarboxylic acid having a 2,6-naphthalenedicarboxylic acid content of not less than 90% by mole with a hydroxy compound having an ethylene glycol content in the range of from 90 to 99.5% by mole and a content of a compound having three or more ester forming functional groups in the range of from 0.5 to 5% by mole, or a transesterification; andpackaging films or packs produced from these resins.
    • 本发明涉及一种聚2,6-萘二甲酸乙二醇酯薄膜,其包含主要由聚2,6-萘二甲酸二乙酯组成的树脂,其特性粘度η为0.31至0.6,所述薄膜的拉伸比为1至 在大致相互垂直的方向分别为3倍和1至3倍或3至6倍和1至1.8倍,厚度为5至150微米; 包含主要由两种成分组成的共混物的聚2,6-萘二甲酸乙二醇酯树脂:特性粘度在0.3至0.5dl / g范围内的聚2,6-萘二甲酸乙二醇酯树脂,并通过酯化反应 具有不小于90摩尔%的乙二醇含量不低于90摩尔%的2,6-萘二甲酸含量的二羧酸或酯交换反应和聚2,6-萘二甲酸乙二醇酯树脂 其特性粘度范围为0.5〜0.7dl / g,通过2,6-二羧酸含量不小于90%摩尔的二羧酸与乙二醇含量的二醇的酯化反应制得 不低于90摩尔%或酯交换反应,该树脂共混物的特性粘度范围为0.31至0.68dl / g; 通过使2,6-萘二甲酸含量为90%以上的二羧酸与羟乙基酯的酯化反应制备的改性聚2,6-萘二甲酸乙二醇酯,所述羟基化合物的乙二醇含量范围为 90〜99.5摩尔%,含有3个以上酯形成官能团的化合物的含量为0.5〜5摩尔%,或酯交换反应。 以及由这些树脂制成的包装膜或包装。