Material Drying
3 Aufrufe
Silver Streaks in PCTG Injection Molded Products
Problembeschreibung
Silver or white fine streaks appear on the surface of PCTG products.
Ursachenanalyse
The raw material moisture content is high (>0.05%), and the water vaporizes during processing to produce silver streaks; the back pressure is insufficient and the barrel contains air.
Lösung
Fully dry to moisture <0.03%; increase the back pressure to 0.5-1.0MPa for venting; reduce the barrel temperature.
Wichtigste Erkenntnis
PCTG silver streaks mainly originate from moisture and gas.
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