Material Analysis
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EAA hardness too high
Problembeschreibung
EAA product Shore hardness 5-10 degrees higher than target, hard hand feel
Ursachenanalyse
EAA crystallinity too high, increased rigidity; excessive filler addition; cooling too fast, crystallization incomplete but rigidity frozen in
Lösung
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
Wichtigste Erkenntnis
High hardness is caused by crystallization and filler; adjusting cooling and filler is key
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