Extrusion & Post
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ASA film surface defects
Problem Phenomenon
ASA film extrusion surface shows gel particles, streaks and thickness fluctuations; outdoor lamination applications complain of uneven weathering and poor appearance.
Cause Analysis
ASA film has high requirements for raw material cleanliness and plasticization uniformity; gel particles originate from impurities or degraded particles; streaks are related to die lip condition and temperature fluctuations; thickness fluctuations amplify weathering differences.
Solution
①Strengthen raw material filtration and purging management; ②regularly clean and polish the die lip; ③stabilize extrusion temperature and screw speed; ④link online thickness measurement with appearance inspection.; After adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
ASA film quality is a comprehensive reflection of extrusion stability; weathering layer thickness uniformity determines outdoor life consistency; online inspection is standard equipment in the film industry.
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