HG/T 4457-2012 (English Version) PDF

Scope: This standard specifies two test methods for the determination of plasticizer leakage under humid conditions. The two methods include: 　——Method A: The sample is suspended in a closed container filled with distilled water; 　——Method B: The sample is Hang directly in the constant temperature and humidity test chamber. This standard is suitable for measuring the plasticizer exudation tendency of plasticized plastics under humid conditions, and grading based on appearance changes to evaluate the compatibility of plastic plasticizers in humid environments. It is also suitable for quantitative determination of the amount of plasticizer seepage under humid conditions. When this standard is used to compare different plasticizers, standard compounds should be prepared using well-defined resins and known proportions of plasticizers.

HG/T 4457-2012 Referenced Document

GB/T 2423.3-2006 Environmental testing for electric and electronic products-Part 2:Tesing method-Test Cab：Damp heat,steady state
GB/T 2918-1998 Plastics--Standard atmospheres for conditioning and testing
GB/T 6682 Water for analytical laboratory use.Specification and test methods
GB/T 7141-2008 Plastics.Methods of heat aging
GB/T 9352-2008 Plastic.Compression moulding of test specimens of thermoplastic materials

2012 HG/T 4457-2012 Plastics.Determination of exudation of plasticizers under humid condition