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