发明名称 |
Process and apparatus for reducing the sag and/or the different stress profile of by extrusion blowing produced and flattened tubular film. |
摘要 |
The invention relates to a process for reducing the sag and/or the varying stress profile of a tubular film of thermoplastic material, produced by the blow-moulding method and laid flat, transversely to its longitudinal direction. To achieve the object of providing such a process by which the sag and/or the different stress states transversely to the tubular film can be reduced or completely eliminated as far as possible in a simple way, the tubular film is heated over its width and subsequently cooled and/or stretched. The invention also relates to an apparatus for carrying out this process. |
申请公布号 |
EP0462420(A1) |
申请公布日期 |
1991.12.27 |
申请号 |
EP19910108452 |
申请日期 |
1991.05.24 |
申请人 |
WINDMOELLER & HOELSCHER |
发明人 |
FEISTKORN, WERNER, DR. DIPL.-ING.;VOSS, KLAUS-PETER, DIPL.-ING. |
分类号 |
B29C55/28;B29C55/06;B29C71/02;B29L7/00 |
主分类号 |
B29C55/28 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|