GMNA GM223M PDF

1 Scope This specification provides a system for specifying significant properties of commonly used polyurethane foams. This specification applies to slab, bonded, and molded flexible cellular products. Urethane foam may be generally defined as an expanded cellular product produced by the interaction of active hydrogen compounds, water and isocyanates. This standard does not apply to foam made from vinyl chloride and polyolefin polymers. For specifying vinyl chloride foams use ASTM D1565 (Specification for Flexible Cellular Materials Vinyl Chloride Polymers and CoPolymers - Open Cell Foam) or ASTM D1667 (Specification for Flexible Cellular Materials Vinyl Chloride Polymers and Co-Polymers - Closed Cell Foam). For specifying polyolefin foams like polyethylene foams use ASTM D4819 (Specification for Flexible Cellular Materials From Polyolefin Plastics).