Coextrusion processes for making multilayer films and films made thereby
    5.
    发明授权
    Coextrusion processes for making multilayer films and films made thereby 有权
    用于制造由此制成的多层膜和膜的共挤出方法

    公开(公告)号:US09296182B2

    公开(公告)日:2016-03-29

    申请号:US12302211

    申请日:2007-06-08

    摘要: The invention relates to a blown film coextrusion process. The process involves extruding core contact layers through a die exit at a specified speed and cooling, orienting and crystallizing the multi-layer film formed at a specified deformation rate to form a the frost line is a specified distance from the die exit by withdrawing film at a take up speed. The core and core contact layers are of a film forming polymer composition comprising at least 90 wt % of ethylene based polymer. The ethylene based polymer of the core layer has an average density of ethylene based polymers equal to or higher than that of ethylene based polymer of the core contact layers. The invention specifically concerns the feature that the core layer composition contains a portion of and the composition of the core contact layers contains a portion of a linear polyethylene so as to make the core layer more resistant to deformation than the skin layers.

    摘要翻译: 本发明涉及一种吹塑薄膜共挤出方法。 该方法包括以规定的速度挤出芯接触层通过模具出口,并以指定的变形速率冷却,取向和结晶形成的多层膜,以形成霜线,通过在模出口处指定距离, 收起速度。 核心和核心接触层是包含至少90wt%乙烯基聚合物的成膜聚合物组合物。 核心层的基于乙烯的聚合物具有等于或高于芯接触层的基于乙烯的聚合物的乙烯基聚合物的平均密度。 本发明具体涉及芯层组合物包含一部分的芯层接触层的组成并包含一部分线性聚乙烯的特征,以使芯层比皮肤层更具抗变形性。

    Coextrusion Processes For Making Multilayer Films And Films Made Thereby
    8.
    发明申请
    Coextrusion Processes For Making Multilayer Films And Films Made Thereby 有权
    用于制造多层膜和膜的共挤出工艺

    公开(公告)号:US20090110913A1

    公开(公告)日:2009-04-30

    申请号:US12302211

    申请日:2007-06-08

    IPC分类号: B32B27/32

    摘要: The invention relates to a blown film coextrusion process. The process involves extruding core contact layers through a die exit at a specified speed and cooling, orienting and crystallizing the multi-layer film formed at a specified deformation rate to form a the frost line is a specified distance from the die exit by withdrawing film at a take up speed. The core and core contact layers are of a film forming polymer composition comprising at least 90 wt % of ethylene based polymer. The ethylene based polymer of the core layer has an average density of ethylene based polymers equal to or higher than that of ethylene based polymer of the core contact layers. The invention specifically concerns the feature that the core layer composition contains a portion of and the composition of the core contact layers contains a portion of a linear polyethylene so as to make the core layer more resistant to deformation than the skin layers.

    摘要翻译: 本发明涉及一种吹塑薄膜共挤出方法。 该方法包括以规定的速度挤出芯接触层通过模具出口,并以指定的变形速率冷却,取向和结晶形成的多层膜,以形成霜线,通过在模出口处指定距离, 收起速度。 核心和核心接触层是包含至少90wt%乙烯基聚合物的成膜聚合物组合物。 核心层的基于乙烯的聚合物具有等于或高于芯接触层的基于乙烯的聚合物的乙烯基聚合物的平均密度。 本发明具体涉及芯层组合物包含一部分的芯层接触层的组成并包含一部分线性聚乙烯的特征,以使芯层比皮肤层更具抗变形性。