Put the foam under a specified temperture and reglar time to test the changes of thickness of the sample after recovery. ISO 1856, ASTM D3574
Foam Permanent Compression Tester
To suit sample size: 50mmx50mmx25mm
Two flat plates, placed parallel to each other by bolts. The space between the plates is adjustable using spacers to suit different sample thickness.
ISO 1856, ASTM D3574