32. The pre-treatment additives produced by an additive factory include penetrating scouring agents, detergents and dispersants, etc. In order to cooperate with the factory for reasonable use, what testing items need to be done? Are there any standards for the testing methods?
Answer: Printing and dyeing factories use many pre-treatment additives. Commonly used ones include penetrants, scouring agents, cleaning agents, chelating dispersants, etc. Before application, it is generally necessary to pass testing and meet production requirements before use. Its testing methods have national standards for reference.
(1) Cloud point determination: GB/T 5559-1993 “Determination of cloud point of ethylene oxide type and ethylene oxide-propylene oxide block polymerized nonionic surfactants”.
(2) Stability determination: including
GB 5555 2003 “Test Method for Acid Resistance of Surfactants”
GB 5556–2003 “Test Method for Alkali Resistance of Surfactants”
GB/T 7381 1993 “Method for determination of the stability of surfactants in hard water”
(3) Dispersion test: GB/T 7463–2008 “Determination of the dispersion power of surfactant calcium soap by acid titration method”
(4) Wetness test: HG/T 2575–1994 “Immersion method for determination of wetting power of surfactants”
(5) Foaming test: GB/T l3173.6-1993 “Cleaning agent foam Determination of Foaming Power》
(6) Emulsification test: GB/T 6369–2008 “Colorimetric method for determination of emulsifying power of surfactants”
(7) Detergency test: GB/T l3174- 2008 “Determination of Detergency and Cycle Cleaning Performance of Cleaning Agents for Clothing”
Others such as solid content determination, ionic identification, capillary effect testing as needed, and surface tension determination GB/T 5549–1990 “Surface The active agent is measured by pulling up the liquid film method to measure the surface tension, and the critical micelle concentration is measured according to GBll278–1989, which can be tested according to the manufacturer’s needs.
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