Molding Process
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PI imidization shrinkage too large
Problem Phenomenon
The dimensional shrinkage of the product after imidization exceeds expectations
Cause Analysis
Volume shrinkage caused by the chemical structure transformation of imidization (10-15%); solvent volatilization
Solution
Consider the imidization shrinkage allowance in design; control the initial PAA dimensions of the product
Key Takeaway
The chemical shrinkage of PI is a factor that must be considered in design and processing
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