Processing Machinery
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Black Speck Impurity Problem of PBT Flame-Retardant Material
Problem Phenomenon
Black specks or impurities appear in flame-retardant PBT products, affecting appearance and electrical properties.
Cause Analysis
The flame retardant is poorly dispersed or impurities are mixed in; metal impurities in the regrind; carbon deposits from the equipment fall off.
Solution
Select high-purity flame-retardant PBT raw materials; sieve the raw material and remove iron magnetically; regularly clean the barrel.
Key Takeaway
PBT flame-retardant material impurities are a fatal defect for electrical applications.
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