This standard specifies the method for determining the foaming reaction characteristics of polyurethane raw materials. This standard is suitable for measuring the milky white time (starting time), cup top time, free rising time, free rising height, gel time (drawing time), non-stick time, Fallback percentage and free foam density.
HG/T 4574-2014 Referenced Document
GB/T 2918-1998 Plastics--Standard atmospheres for conditioning and testing
GB/T 6343-2009 Cellular plastics and rubbers.Determination of apparent density
HG/T 4574-2014 history
2014HG/T 4574-2014 Polyurethane material.Determination of foam reaction characteristic