Common problems and relevant solved cases in Pigment Carbon Black application
1.First, figure out whether the kind of Pigment Carbon Blacks is right.
Blackness is one of the characteristic index of carbon black. Try to use low-blackness carbon black,under the condition of meeting the requirements.
In addition, acidity or alkalinity,and the height of structure are all important index that should be taken into consideration when deciding the kind of carbon black.
2 .In most cases, problems exist in the dispersion process,as fineness doesn’t reach the standard.
- Carbon black should be soaked in solvent,resin and dispersing agent for more than 24h before dispersing.
- Check the dispersing process, especially the temperature,proportion and etc.that affect guarant viscosity.
- Check the content of carbon black in the formula.Insufficiency of carbon black will also lead to the insufficiency of blackness.
- Check the kind and dosage of auxiliaries.
Relevant solved cases in Pigment Carbon Black application
1)Choose carbon black with better dispersibility.
2)Soak carbon black in solvent,resin and dispersing agent for more than 24h before dispersing.
3)Check the content of impurities in CZC, resin, solvent,carbon black or other constituents in the system.
4)Make out whether the organic anhydrous system is mixed with water,or the moisture content of resin and carbon black is too high.
5)Guarant viscosity may be too low;shear force may be not enough when grinding or squeezing out.Adjust the formula and viscosity of the system.