Molding Process
5 views
Coarse internal crystallization of EAA
Problem Phenomenon
The spherulites inside EAA products are coarse >50μm, causing reduced transparency and low impact
Cause Analysis
Cooling rate too slow <5°C/min allows spherulites to fully grow; no nucleating agent used to control crystallization
Solution
1) Increase the cooling rate to >20°C/min to refine spherulites; 2) Add 0.2-0.3wt% nucleating agent to control crystallization; 3) Lower the mold temperature to accelerate cooling
Key Takeaway
Coarse crystallization is caused by slow cooling; fast cooling and nucleating agent are the key
Was this helpful?
0 people found this helpful
Thank you for your feedback!