• J388

• 1969-03-01

• Historical. Access the latest revision: J388_199806

• Textile And Flexible Plastics Committee

This SAE Recommended Practice describes a laboratory test procedure for evaluating the loss of thickness and the amount of structural breakdown of slab polyurethane foam seating materials. A test specimen is measured for thickness under a specified load and subsequently subjected simultaneously to compressive and shear deformation in a controlled atmosphere. This is accomplished by subjecting the foam to a rolling shearing action under a constant load for a specified number of cycles. Specimen thickness under a constant load is obtained after a 1hr recovery period following dynamic fatigue to determine loss in foam thickness.

• SAE J 388

• Automotive

• Seats and seating
• Materials
• Foams
• Polymers
• Plastics
• Fatigue
• Textiles