System and method for preforming an extruded parison
    14.
    发明授权
    System and method for preforming an extruded parison 失效
    用于预成型挤出型坯的系统和方法

    公开(公告)号:US06168750A

    公开(公告)日:2001-01-02

    申请号:US09222721

    申请日:1998-12-29

    IPC分类号: B29L4904

    摘要: The invention relates to a system for preforming an extruded plastics parison including a nonplanar conveyor belt. It also relates to a method for preforming an extruded parison, including a step during which the parison is deposited on a conveyor belt. The conveyor belt is not planar. This step may be accompanied by a step in which the parison undergoes transverse deformation. The invention also relates to a method of manufacturing at least one article, including such a preforming step.

    摘要翻译: 本发明涉及一种用于预成型包括非平面传送带的挤压塑料型坯的系统。 它还涉及一种用于预成型挤压型坯的方法,其包括在型坯被放置在传送带上的步骤。 传送带不平面。 该步骤可以伴随着型坯经历横向变形的步骤。 本发明还涉及一种制造至少一种制品的方法,包括这种预成型步骤。

    Structures with multiple polymeric layers comprising a vinylidene
fluoride polymer layer bonded to a polar polymer layer
    20.
    发明授权
    Structures with multiple polymeric layers comprising a vinylidene fluoride polymer layer bonded to a polar polymer layer 失效
    包含聚偏氟乙烯聚合物层的多个聚合物层的结构粘合到极性聚合物层

    公开(公告)号:US5096782A

    公开(公告)日:1992-03-17

    申请号:US527331

    申请日:1990-04-26

    摘要: Structures with multiple polymeric layers comprising a vinylidene fluoride polymer layer bonded to a polar polymer layer by the use of a polymeric adhesive comprising a vinyl acetate polymer. These structures are characterized in that the product of the weight content of vinyl acetate of the polymeric adhesive, expressed in percent, and its dynamic viscosity at 100.degree. C. and 1 s.sup.-1, expressed in kPa s, is greater than 1.4.times.10.sup.3. The structures with multiple polymeric layers can take the form of films, sheets, panels, tubes or hollow bodies which can be employed particularly in the field of protection against corrosion or ultraviolet rays.

    摘要翻译: 具有多个聚合物层的结构包括通过使用包含乙酸乙烯酯聚合物的聚合物粘合剂与极性聚合物层结合的偏二氟乙烯聚合物层。 这些结构的特征在于聚合物粘合剂的乙酸乙烯酯的重量含量(以百分比表示)及其在100℃和1s -1下的动态粘度(kPa)表示的乘积大于1.4×10 3。 具有多个聚合物层的结构可以采取膜,片,面板,管或中空体的形式,其可以特别用于防止腐蚀或紫外线的领域。