Material Drying
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Process fluctuation caused by polystyrene raw material batch differences
Problem Phenomenon
After changing the raw material batch, product quality fluctuates and process parameters need adjustment.
Cause Analysis
(1) Different batches of raw material differ in molecular weight or molecular weight distribution
(2) Raw material additive content or type differs
(3) Raw material moisture content differs
(4) Raw material particle size and shape differ
(5) Raw material storage conditions and time differ
Solution
(1) Conduct small-batch trial production first when changing batches
(2) Test the melt flow rate of the new batch of raw material
(3) Fine-tune process parameters according to raw material characteristics
(4) Keep raw material storage conditions consistent, first-in first-out
(5) Establish raw material inspection standards
Key Takeaway
Raw material batch differences need to be addressed through incoming inspection and process adjustment.
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