发明申请
- 专利标题: Multi-Tube Extrusion Apparatus and Method
- 专利标题(中): 多管挤出设备及方法
-
申请号: US12501627申请日: 2009-07-13
-
公开(公告)号: US20100007043A1公开(公告)日: 2010-01-14
- 发明人: Aamir W. Siddiqui , George O. Pehr , Myron D. Nicholson
- 申请人: Aamir W. Siddiqui , George O. Pehr , Myron D. Nicholson
- 申请人地址: US IL Darien
- 专利权人: VISKASE COMPANIES, INC.
- 当前专利权人: VISKASE COMPANIES, INC.
- 当前专利权人地址: US IL Darien
- 主分类号: B29C47/88
- IPC分类号: B29C47/88 ; B28B21/52
摘要:
A method and apparatus for producing a plurality of bi-oriented, heat-shrinkable thermoplastic tubular films is disclosed. Thermoplastic resin is extruded through a plurality of annular dies to form a plurality of molten plastic tubes. The tubes are cooled and solidified and sent through a plurality of pinch rollers to stretch the tubes simultaneously in a machine and transverse direction, creating a plurality of tubular films. The films are cooled and heated, and then relaxed simultaneously in a machine and transverse direction. Winding rollers then wind up the finished tubular films.