Load Deflection Testing of Urethane Foams for Automotive Seating

Standard:
Reaffirmed:
  • 2007-08-13
 
Publisher:
  • SAE International
Pages:
2
Scope:

Traditionally, cellular foam products have been checked for load deflection by determining the load required to cause a 25% deflection. In automotive seating, on the other hand, the load deflection is checked by determining the thickness under constant force conditions to (a) indicate the initial softness of the seat cushion, (b) measure how thick the seat cushion is under the average passenger load (a measurement of padding left for "ride" and seated height), and (c) determine a value to indicate resiliency. In this method these measurements are made by determining the thickness of the seat cushion under fixed loads of 4.5 N, 110 N, and 220 N with a 323 cm2 circular indentor foot.

History:
Standard Published Revision Status
J815_201211 2012-11-19 Latest Canceled
2007-08-13 Historical Reaffirmed
2002-10-30 Historical Revised
2001-12-10 Historical Reissued
1998-06-01 Historical Issued
1994-01-01 Historical Reaffirmed
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