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DuPont Sets Up Coex Tube and Pipe Tech Center

DuPont Engineering Polymers, Wilmington, Del., has created a new Center of Excellence for coextruded pipe and tubing at its European Technical Center in Geneva, Switzerland.

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DuPont Engineering Polymers, Wilmington, Del., has created a new Center of Excellence for coextruded pipe and tubing at its European Technical Center in Geneva, Switzerland. It contains three Swiss Maillefer extruders of 30 to 45 mm diam., a threelayer die head for tubing of 4 to 32 mm diam., and a corrugator from Corelco in France. Corelco has a patent on making a continuous chain of bottles with a corrugator and DuPont has tested production of Delrin acetal bottles in this manner. The Center has also prototyped partly corrugated automotive coolant pipe coextruded of Zytel nylon and Bynel adhesive resin, which acts as a barrier to water/glycol mixtures and increases hot-water resistance. E-mail: plastics@che.dupont.com

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