Moving laminar flow of plasticized materials divergently...

Details Moving laminar flow of plasticized materials divergently... Moving laminar flow of plasticized materials divergently...

B - Operations, Transporting

29

C

18/746

B29C 47/06 (2006.01)

Patent

CA 1221518

ABSTRACT OF THE DISCLOSURE Method and apparatus for extruding laminated plastic products. One process for extruding multiple thermoplastic resins comprises supplying separate streams of thermoplastic resins into an extrusion apparatus and causing the streams to combine therein in a flowing manner to form an interface between said streams. The combined streams are then caused to flow laminarly without any mixing across the interface between the thermoplastic resin streams so as to maintain the physical integrity of each stream in said combined stream. The overall cross-sectional geometric configuration of the combined stream is altered within a forming die thereby providing a thermo- plastic resin extrudate exiting said die, which has a coexten- sive, integral, and uniform configuration of said thermoplastic resins in said extrudate.

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