Material Analysis 9 views

Poor resilience of PU flexible foam

Problem Phenomenon

PU flexible foam resilience <40%, below 60%

Cause Analysis

Isocyanate index too high >1.1; foam density too high; improper catalyst formulation

Solution

1) Lower isocyanate index to 0.95-1.0; 2) Increase blowing agent to reduce density; 3) Adjust catalyst formulation

Key Takeaway

PU flexible foam resilience is determined by isocyanate index and catalyst formulation

PU flexible foam resilience isocyanate index catalyst foam density

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