Material Analysis
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DSTDP hardness too high
Fenómeno do problema
DSTDP product Shore hardness 5-10 degrees higher than target, hard hand feel
Análise das causas
DSTDP crystallinity on the high side, rigidity increased; filler added too much; cooling too fast, crystallization incomplete but rigidity frozen
Solução
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
Conclusão principal
High hardness is caused by crystallization and filler; adjusting cooling and filler are key
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