发明名称 |
Process and apparatus for producing a synthetic resin sheet having a colored band of varying color intensity |
摘要 |
Process and apparatus for producing a sheet or film exhibiting a colored band of varying color intensity, with an extruder for melting a stream of a thermoplastic synthetic resin and with a slot die tool (e.g. a fishtail die) having a distributor duct with a throttle zone arranged upstream thereof, a back pressure plate or restrictor bar, and a nozzle orifice, wherein a colorless melt stream and a dyed melt stream are respectively shaped into a sheet having the desired width and are melted together prior to exiting from the die tool along a lateral edge to form one sheet; and wherein along a predetermined width, calculated from a transition line of the dyed sheet, a wedge-like extending color band made up of a partial stream of the dyed melt stream is introduced into the zone of the colorless sheet by way of a slot die having a wedge-like orifice and being arranged in the extrusion direction upstream of the back pressure plate and downstream of the distributor duct, with a corresponding displacement of the colorless melt stream.
|
申请公布号 |
US4562023(A) |
申请公布日期 |
1985.12.31 |
申请号 |
US19830545239 |
申请日期 |
1983.10.25 |
申请人 |
DYNAMIT NOBEL AKTIENGESELLSCHAFT |
发明人 |
PABST, HORST;BRINKMANN, HANS |
分类号 |
B29C47/04;B29C47/16;B32B17/10;(IPC1-7):B29D9/00 |
主分类号 |
B29C47/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|