公开(公告)号：US06787219B2

公开(公告)日：2004-09-07

申请号：US09922615

申请日：2001-08-06

申请人： Herbert Peiffer ,  Gottfried Hilkert

发明人： Herbert Peiffer ,  Gottfried Hilkert

IPC分类号： B32B764

CPC分类号： B32B27/36 ,  Y10S428/91 ,  Y10T428/24942 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/265 ,  Y10T428/31667 ,  Y10T428/31681 ,  Y10T428/31786

摘要： A transparent, biaxially oriented polyester film is disclosed, with a base layer B which comprises at least 80% by weight of thermoplastic polyester, and with at least one intermediate layer Z, and with at least one outer layer A. The outer layer A is composed of a polymer or of a mixture of polymers which contains at least 85% by weight of ethylene 2,6-naphthalate units and up to 15% by weight of ethylene terephthalate units, and/or up to 15% by weight of units derived from cycloaliphatic or aromatic diols and/or dicarboxylic acids, and the intermediate layer Z is composed of a mixture of polymers which contains at least 3% by weight of ethylene 2,6-naphthalate units and up to 97% by weight of ethylene terephthalate units, and/or up to 97% by weight of units derived from cycloaliphatic or aromatic diols and/or dicarboxylic acids. The Tg2 value of the polyester film is above the Tg2 value of the base layer B, but below the Tg2 value of the outer layer A. The film has low permeability to atmospheric oxygen and exhibits very good adhesion between the individual layers. It is particularly suitable for packaging purposes, specifically for packaging foods or other consumable items.

摘要翻译： 公开了一种透明的双轴取向聚酯膜，底层B包含至少80重量％的热塑性聚酯，以及至少一个中间层Z和至少一个外层A.外层A为 由聚合物或包含至少85重量％的2,6-萘二甲酸乙二醇酯单元和至多15重量％的对苯二甲酸乙二醇酯单元的聚合物混合物和/或至多15重量％的衍生的单元 来自脂环族或芳族二醇和/或二羧酸，并且中间层Z由聚合物的混合物组成，所述聚合物含有至少3重量％的2,6-萘二甲酸乙二醇酯单元和至多97重量％的对苯二甲酸乙二醇酯单元 ，和/或至多97重量％的衍生自脂环族或芳族二醇和/或二羧酸的单元。 聚酯膜的Tg2值高于基底层B的Tg2值，但低于外层A的Tg2值。该膜对大气氧具有低渗透性，并且在各层之间表现出非常好的粘附力。 它特别适用于包装目的，特别适用于包装食品或其他消耗品。