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Leistritz demonstrates carbon dioxide system.(News)(Brief Article)

American Leistritz Extruder Corp. ran a carbon dioxide foam profile line at NPE 2003, the first time by a twin-screw extruder supplier at the Chicago show, according to the company.

Leistritz produced a closed-cell foam of a Nova low density polyethylene. A key feature of the system is rapid solubilization of carbon dioxide liquid in the polymer melt.

"Carbon dioxide liquid is far easier to mix in the polymer melt than is the gas,'' said Bill Thiele, company founder and now technical consultant to the Somerville, N.J., firm.

"Over the next decade we will see the advantages of going to environmentally friendly alternatives like carbon dioxide,'' ...

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