Propex Operating Company, LLC

C. Cramer, Weberei, Heek-Nienborg, Gmbh & Co. Kg

Keppel, Jürgen

Andy Rakovac

Hugh C Gardner

Thomas Holtmann

Kam Chung Lui

Josef Uesbeck

Philippe Combier

Jürgen Keppel

Making foamed polyolefin tapes can include combining a polyolefin resin and a chemical blowing agent to form a mixture. This mixture can then be heated in an extruder to create a supersaturated solution of gas within the polyolefin resin. A cooling device can be positioned adjacent to a die at a set distance for receiving extruded resin and for allowing exposure of the extruded resin to ambient air between a die outlet and the cooling device. This predetermined distance or space between the cooling device and die outlet allows bubbles to grow in the extruded resin and to be shaped such that voids or empty spaces can be generated within the extruded polyolefin resin. The voids or empty spaces allow the formation of tapes which use less material but have adequate strength for various applications, such as for carpet backings, geotextiles, packaging, housewrap, bags, wire insulation, and reinforcement elements in concrete.

Method and system for manufacturing foamed polyolefin tapes at cost effective line speeds

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Gronau, Germany

Andy Rakovac