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Manufacturing Industry

Polymer additives help make better bottles. (Of Material Interest).

Advanced Materials & Processes,  January, 2002  

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The Dynamar line of polymer processing additives (PPAs) supplied by Dyneon LLC, Oakdale, Minn., is used in the extrusion of plastic film, fiber, pipe, tubing, and other products. The additives are credited with reduced cycle times, improved control of die swell and product weight, and better pigment dispersion.

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At least one Dynamar PPA--FX 5911X -- has now been shown to enhance the blow molding of high-density polyethylene (HDPE) bottles. For example, the addition of 500 ppm to an HDPE resin containing 6% Ti[O.sub.2] reportedly reduced the apparent shear stress of the material and ...

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