What are the inspection indicators of white carbon black?
The chemical indicators that need to be tested for white carbon black mainly include: specific surface area, oil absorption value, pH value, silica content, loss on ignition, loss on heating, iron, copper and manganese content, etc.;
The physical indicators that need to be tested for silica mainly include: tensile strength, elongation at break, 500% elongation strength, tear strength, etc. of the rubber compound under the standard formula.
White carbon black detection index
1. Precipitation silica detection index
Precipitated silica can also be called precipitated hydrated silica, and the chemical formula of precipitated silica is SiO2?nH2O. The detection indicators of precipitation method silica mainly include silica content, color, 45μm sieve residue, heating loss, ignition loss, PH value, total copper content, total manganese content, total iron content, phthalate di Butyl ester absorption value, water soluble matter, 300% modulus stress, 500% modulus stress, tensile strength, elongation at break, physical form, dispersibility, specific surface area and other indicators.
2. Detection index of highly dispersed precipitated silica
Highly dispersed precipitated silica can also be called highly dispersed precipitated hydrated silica. The detection index of high dispersed precipitated silica is basically the same as that of ordinary precipitated silica, but the detection index of technical index and typical value is added. Therefore, the technical indicators of high-dispersion precipitated silica also need to detect the two indicators of median particle size and particle proportion. The typical value stipulates that three indicators need to be tested: total surface area, CTAB adsorption specific surface area, and dispersion.
3. What items need to be tested for fumed silica?
Fumed silica can be called fumed silica, and the appearance of fumed silica is required to be a fluffy white powder. The specific detection indicators mainly include nitrogen adsorption specific surface area, loss on ignition, silicon dioxide content, aluminum oxide content, titanium dioxide content, ferric oxide content, carbon content, chloride content, suspension pH value, and 105°C volatilization Items such as material, tap density, 45μm sieve residue, etc.
Testing standard for white carbon black
1. Testing standards for fumed silica products
HG/T 3061-2009 "Rubber Compounding Agent Precipitated Hydrated Silica"
GB/T 20020-2013 "Fumed Silica"
GB/T 32678-2016 "Rubber Compounding Agent Highly Dispersed Precipitated Hydrated Silica"
2. National standard for testing methods of silica for rubber
GB/T 28600-2012 "Rubber Compounding Agent - Determination of Average Pore Size of Precipitated Hydrated Silica"
GB/T 28601-2012 "Rubber Compounding Agent - Determination of Precipitated Hydrated Silica Gel Content"
GB/T 23656-2016 "Rubber Compounding Agent - Determination of Specific Surface Area of Precipitated Hydrated Silica by CTAB Method"
GB/T 32698-2016 "Rubber Compounding Agent - Determination of Particle Size Distribution of Precipitated Hydrated Silica by Laser Diffraction Method"
GB/T 34698-2017 "Rubber Compounding Agent - Determination of Water-soluble Content of Precipitated Hydrated Silica by Conductivity Method"
GB/T 36764-2018 "Rubber Compounding Agent Precipitated Hydrated Silica Determination of Heavy Metal Content by Inductively Coupled Plasma Atomic Emission Spectrometer"
3. Industry standard for the detection method of silica for rubber
HG/T 3073-1999 "Rubber Compounding Agent - Determination of Specific Surface Area of Precipitated Hydrated Silica Nitrogen Adsorption Method"
HG/T 3748-2014 "Rubber Compounding Agent - Determination of Water-soluble Content of Precipitated Hydrated Silica by Cold Extraction Method"
HG/T 2404-2008 "Rubber Compounding Agent - Identification of Precipitated Hydrated Silica in SBR"
HG/T 3062-2008 "Rubber compounding agent - Determination of silica content in dry samples of precipitated hydrated silica"
HG/T 3063-2008 "Rubber compounding agent Precipitated hydrated silica color comparison method"
HG/T 3064-2008 "Rubber Compounding Agent - Determination of Precipitated Hydrated Silica 45μm Sieve Residue"
HG/T 3065-2008 "Rubber Compounding Agent - Determination of Heating Loss of Precipitated Hydrated Silica"
HG/T 3066-2008 "Rubber Compounding Agent - Determination of Loss on Ignition of Dry Sample of Precipitated Hydrated Silica"
HG/T 3068-2008 "Rubber Compounding Agent - Determination of Total Copper Content in Precipitated Hydrated Silica"
HG/T 3069-2008 "Rubber Compounding Agent - Determination of Total Manganese Content in Precipitated Hydrated Silica"
HG/T 3070-2008 "Rubber Compounding Agent - Determination of Total Iron Content in Precipitated Hydrated Silica"
HG/T 3067-2008 "Rubber Compounding Agent - Determination of pH Value of Aqueous Suspension of Precipitated Hydrated Silica"
HG/T 3071-2008 "Rubber Compounding Agent - Determination of Refractive Index of Precipitated Hydrated Silica"
HG/T 3072-2008 "Rubber Compounding Agent - Determination of Absorption Value of Precipitated Hydrated Silica Dibutyl Phthalate (DBP)"