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1.1 This specification covers the minimum physical properties and other requirements for high-resilience polyurethane foam (HR) and combustion modified high resilience polyurethane foams (CMHR).
1.2 Combustion modified high resilience polyurethane foams are high resilience foams that have been modified to meet specific flammability requirements.
1.3 This specification includes references to government regulations for burning characteristics of flexible cellular materials used in specific applications (see Table 1).
ASTM D3770-91, Specification for Flexible Cellular Materials-High-Resilience Polyurethane Foam (HR) and Combustion Modified High Resilience (CMHR) Polyurethane Foam (Withdrawn 1998), ASTM International, West Conshohocken, PA, 1991, www.astm.orgBack to Top