By Bob Lebeaux, President, The Plastics Group of America
October 2, 2009
Myth: The surface appearance of parts molded from glass-filled PP is very poor.
Fact: Mold texture and careful molding techniques can provide a first-class part appearance. A combination of fast injection speeds, liberal venting, and elevated mold temperatures will dramatically improve results in any mold.
Myth: Glass-filled PP parts are very brittle and cannot be used in high abuse or low temperature applications.
Fact: Improvements in impact modification enable glass-filled materials to be produced with excellent impact properties. TPG offers glass-filled materials in at all filler levels with notched izod values of 5 ft-lb/in, about equal to an average ABS resin.
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