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Article: Extrusion. (Making Sense of K '92)
- Article from:
- Plastics Technology
- Article date:
- January 1, 1993
- Author:
CopyrightCOPYRIGHT 1993 Gardner Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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As always, the show featured plenty of news for all sorts of extrusion processors. Most notably, several offerings underscored the show's prevailing recycling theme. Other new introductions and refinements were in dies, extruders and downstream equipment for blown film, cast film, sheet, pipe and profiles.
REPROCESSING UNDRIED PET
On the recycling front, Werner & Pfleiderer attracted considerable attention with a system for making PET film from regrind without any pre-drying. PET flakes containing up to 0.4% moisture were fed directly into a ZSK-40 40-mm twin-screw extruder. After the melting stage, three heated degassing ports remove moisture to a final ...