Material Drying
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ABAK insufficient drying bubbles and silver streaks
Problembeschreibung
Silver streaks, bubbles, and material streaks appear on the surface of ABAK products, with reduced impact strength; moisture absorption of the PA component is the main cause.
Ursachenanalyse
The PA component is highly hygroscopic, and when the moisture content exceeds the standard, it vaporizes at processing temperature; although ABS has low water absorption, the alloy as a whole must be managed according to PA standards; insufficient drying is the most common root cause of alloy defects.
Lösung
①Dry fully at 80~90℃×4~6 hours; ②verify that the moisture content meets the standard; ③store sealed after drying to prevent moisture regain; ④when silver streaks appear, check drying first before adjusting the process.
Wichtigste Erkenntnis
ABAK drying management must be carried out according to the strict standards of the PA component; 4~6 hours is the alloy drying benchmark; moisture verification cannot be omitted.; After confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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