This standard specifies test methods for the physical and mechanical performance of molded (including cold plastic and thermoplastic) polyurethane foam plastics.
This standard applies to polyurethane foam for molded car seat cushions and backrest.
2 Normative references
GB 2918 Plastics - Standard atmospheres for conditioning and testing
GB 10802 Flexible polyurethane foam
GB 6343 Cellular plastics and rubbers - Determination of apparent density
GB 6670 Cellular plastics - Flexible polyurethane foam - Determination of resilience
GB 10807 Polymeric materials cellular flexible: Determination of hardness (indentation technique)
GB 6344 Flexible cellular polymeric materials - Determination of tensile strength and elongation at break
GB 10808 Cellular plastics: Tear resistance test for flexible materials
GB 6669 Flexible cellular polymeric materials - Determination of compression set
3 Test items
This standard specifies the methods for seven tests: determination of apparent density, determination of resilience performance, determination of compression mark performance, determination of tensile strength and elongation break, determination of tear performance, determination of compression set, test of repeated compression.
4 General conditions for test
The standard environment for test conditioning and test shall be adjusted according to the normal standard environment specified in GB 2918, i.e., temperature of 23±2℃, relative humidity of (50±5)%, and air pressure of 86-106 kPa, 16h of conditioning.
