Page 257 - Engineering Plastics Handbook
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Polyphenylene Ether (PPE) Blends and Alloys 219
Regrind. In addition to the regrind comments for modified PPE, increased
drying time is recommended since the sprues, runners, and nondegraded
parts before and after grinding will have absorbed moisture.
Summary
Clearly the PPE-based resins offer one of the most versatile product
families. Products based on blends with polystyrene are available as
unfilled and reinforced grades and nonbrominated and nonchlorinated
flame-retardant (ECO-label compliant) grades. Moreover, modified PPE
can be opaque or transparent, rigid or flexible. In addition, modified PPE
offers a broad range of processing options including injection molding,
extrusion, blow molding, expanded foam, and structural foam molding.
In addition, PPE alloys with polyamides and polypropylene are available
in unfilled and reinforced grades. These grades exhibit enhanced perform-
ance over polyamides and polypropylene. Moreover, the PPE/polyamide
grades include conductive grades for use in electrostatic online painting
and a nonbrominated, nonchlorinated, nonred phosphorous flame-retar-
dant grade.
Finally, PPE is used in thermoset resins to enhance their performance.
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