Material Analysis
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Large smoke in PVA processing
Problem Phenomenon
During PVA processing, large amount of smoke and volatiles overflow from the vent
Cause Analysis
Low molecular volatiles in PVA evaporate at processing temperature; additive decomposition produces smoke; insufficient exhaust system
Solution
1) Lower processing temperature to reduce volatilization; 2) Increase exhaust system capacity; 3) Select low-volatility raw material grade
Key Takeaway
Large smoke is caused by volatiles evaporation; temperature reduction and exhaust are the key
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