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    Process for producing a heatsealable and peelable polyester film
    3.
    发明申请
    Process for producing a heatsealable and peelable polyester film 审中-公开
    生产可热封和可剥离的聚酯薄膜的方法

    公开(公告)号：US20050173050A1

    公开(公告)日：2005-08-11

    申请号：US10984325

    申请日：2004-11-09

    申请人： Herbert Peiffer ,  Bart Janssens ,  Bodo Kuhmann ,  Paul Broemmel

    发明人： Herbert Peiffer ,  Bart Janssens ,  Bodo Kuhmann ,  Paul Broemmel

    IPC分类号： B29C55/14 ,  B29K67/00 ,  B32B27/36 ,  C08J5/18 ,  C08J7/04

    CPC分类号： B32B27/36 ,  B32B27/08 ,  B32B2038/0028 ,  B32B2307/518 ,  C08J5/18 ,  C08J2367/02 ,  Y10T428/31794

    摘要： A process for producing a biaxially oriented polyester film which has a base layer (B) and has a heatsealable outer layer (A) that can be peeled from polyester, where the outer layer (A) includes from 60 to 99% by weight of polyester which is composed of from 12 to 89 mol % of units derived from an aromatic dicarboxylic acid and of from 11 to 88 mol % of units derived from at least one aliphatic dicarboxylic acid, where the total of the molar percentages is 100, encompassing the steps of a) extruding of at least the base layer (B) to give an unoriented film; b) stretching this film in a first direction; c) stretching this film in a second direction perpendicular to the first d) heat-setting the stretched film, and e) producing the outer layer (A) on the base layer (B) by using lamination to apply the outer layer film (A) produced in a separate process, where the lamination step e) takes place prior to step b) or between steps b) and c).

    摘要翻译： 一种双轴取向聚酯薄膜的制造方法，其具有基材层（B），并且具有可从聚酯上剥离的可热封外层（A），其中外层（A）含有60〜99重量％的聚酯 其由12至89摩尔％的衍生自芳族二羧酸的单元和11至88摩尔％的衍生自至少一种脂族二羧酸的单元组成，其中摩尔百分数的总和为100，包括步骤 a）至少挤出基层（B）以产生未取向的膜; b）沿第一方向拉伸该膜; c）在与第一d垂直的第二方向上拉伸该膜d）热定形拉伸膜，以及e）通过层压将外层膜（A）施加到底层（B）上来制造外层（A） ），其中层压步骤e）在步骤b）之前或在步骤b）和c）之间进行。