FPF Background

 
Flexible Polyurethane Foam Slide Presentation
 

 

Slide 27 of 31

Firmness retention is measured in the laboratory using a standardized dynamic fatigue procedure. In the test, a weighted indentor foot compresses the foam sample repeatedly for 80,000 cycles. Change in 25% IFD is then determined. Quality foam products typically retain at least 80% of original firmness. On the other hand, fiberfill cushioning tends to gain firmness and lose comfort during the same test as fibers compact.

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