Material Analysis
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Insufficient PVA tensile strength
Problem Phenomenon
PVA product tensile strength 15-20% below the standard value
Cause Analysis
PVA molecular weight on the low side, insufficient strength base; poor filler interface, no reinforcement effect; excessive orientation, strong longitudinally and weak transversely
Solution
1) Select high molecular weight PVA grade; 2) Treat filler with coupling agent to improve the interface; 3) Reduce orientation to reduce the longitudinal-transverse difference
Key Takeaway
Insufficient tensile strength is caused by molecular weight and poor interface; selecting a high MW grade is the key
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