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    • 3. 发明申请
    • 包装用熱収縮多層ポリエステルフィルム
    • 用于包装的热收缩多层聚酯薄膜
    • WO2004018205A1
    • 2004-03-04
    • PCT/JP2003/010290
    • 2003-08-13
    • 帝人デュポンフィルム株式会社浅田 毅吉田 哲男小山松 淳
    • 浅田 毅吉田 哲男小山松 淳
    • B32B27/36
    • B32B27/36
    • A heat-shrinkable multilayered film for packaging which comprises at least three layers and is produced by the coextrusion method, wherein the surface layers each comprises as the main component a mixture of a polyester (A) obtained from an acid ingredient comprising terephthalic acid (TA) and either naphthalenedicarboxylic acid (NDC) or isophthalic acid (IA) and a glycol ingredient consisting mainly of ethylene glycol (EG) and a polyester (B) obtained from an acid ingredient comprising TA and IA and a glycol ingredient consisting mainly of tetramethylene glycol, and at least one of the core layer(s) comprises as the main component a polyester (C) obtained from an acid ingredient comprising TA and IA and a glycol ingredient consisting mainly of EG. The multilayered film has a shrinkage of 35% or higher in the main shrinkage direction and a shrinkage of 5% or lower in the direction perpendicular thereto.
    • 一种用于包装的热收缩性多层膜,其包含至少三层并且通过共挤出法制造,其中所述表面层各自包含由包含对苯二甲酸(TA)的酸成分获得的聚酯(A)的主要组分 )和萘二甲酸(NDC)或间苯二甲酸(IA)和主要由乙二醇(EG)和聚酯(B)组成的二醇成分,其由包含TA和IA的酸成分和主要由四亚甲基二醇组成的二醇成分 ,并且所述芯层中的至少一个作为主要组分包含由包含TA和IA的酸成分获得的聚酯(C)和主要由EG组成的二醇成分。 多层膜的主收缩方向的收缩率为35%以上,在与其垂直的方向上的收缩率为5%以下。