Molds & Tooling
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PC flame retardant grade processing
Problem Phenomenon
Flame retardant PC parts show silver streaks and increased brittleness, flame retardant precipitates and frosts the surface
Cause Analysis
Flame retardant addition changes PC rheology and thermal stability; some flame retardant systems reduce intermolecular forces causing toughness decline; when processing temperature is too high, flame retardant decomposes, precipitates and corrodes the mold
Solution
①Flame retardant grade managed by supplier upper limit temperature, melt must not exceed the grade specified value; ②Sufficient drying to prevent silver streak amplification; ③Regular mold cleaning to prevent precipitate accumulation
Key Takeaway
Flame retardant PC is a superposition-sensitive system of formulation and process; strictly observing the temperature upper limit, strengthening drying, and frequent mold cleaning are the three elements of stable production；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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