Material Analysis
2 views
DSTDP hardness too high
Problem Phenomenon
DSTDP product Shore hardness 5-10 degrees higher than target, hard hand feel
Cause Analysis
DSTDP crystallinity on the high side, rigidity increased; filler added too much; cooling too fast, crystallization incomplete but rigidity frozen
Solution
1) Reduce cooling rate to make crystallization complete and reduce hard feel; 2) reduce filler addition amount; 3) add plasticizer 0.5wt% to reduce hardness
Key Takeaway
High hardness is caused by crystallization and filler; adjusting cooling and filler are key
Was this helpful?
0 people found this helpful
Thank you for your feedback!