Description of Carbon Black:
Carbon black is mainly used in the production of all - steel and half - steel radial tire and inner tube.Can also be widely used in doors and Windows sealing strip, tubing, shock absorber and brake pads and other automotive parts, and applied in rubber, building materials, electronics, intellectual disabilities, plastics, master of color, paint, fuel, chemical fiber, fiber coloring, ink, ink and paper making and other industries.
Generally, the amount of rubber accounted for 20% -70% of the raw rubber, according to the different amount of rubber products.Rubber carbon black models: rubber carbon black models mostly start with N, mainly N110, N220, N330, N339, N351, N375, N550, N660, N774 and other related models.
White carbon black is an important raw material for rubber industry, mainly used in tires, shoes and other light colored rubber products.Used as carrier or flow agent in pesticide, feed and other industries;Used as a rubbing agent in toothpaste;In the coating industry as dispersant, anti - settling agent or extinction agent.
Main Specification of Carbon Black:
1. The particle size
The particle size of carbon black is the original particle size of carbon black, which is tested by an electron microscope, and is the average of a certain number of particle size.
2. Tinting strength
Also known as coloring intensity.The colouring ability of carbon black when white or colored pigments are mixed with carbon black.Which is how much the carbon black increases the light absorption of the mixture.It is usually expressed as a percentage and can be measured by using a blackness reflector to measure the carbon black diluting paste.
3. Specific surface area
Specific surface area of carbon black refers to the sum of surface area of carbon black particles in unit mass or unit volume, and the unit is m2/g.The specific surface area and particle size are one of the basic properties of carbon black.Generally speaking, the surface of relatively smooth carbon black (such as rubber carbon black) is inversely proportional to the particle size, that is, the smaller the particle size, the larger the specific surface area, and vice versa.Therefore, if the carbon black particles are assumed to be spherical, the specific surface area can be calculated from the particle size data.
4. DBP absorption value
The structure of carbon black can be measured by DBP (dibutyl phthalate) absorption value.According to experience, the DBP absorption value per 100g of carbon black should not be higher than 70mL in low structure pigment.The absorption value of DBP should not be less than 110mL per 100g of carbon black.Middle structure carbon black is in between.The structure has a substantial effect on the application of carbon black pigment.
PH is related to the number of surface functional groups.Furnace carbon black has few functional groups and a small amount of soluble salt, so carbon black itself is mostly neutral or alkaline.In order to improve the viscosity, stability and fluidity of carbon black, some carbon black pigment can change the number of surface functional groups through surface treatment, so as to be acidic.
The weight of carbon black per unit volume is (g/l), which indicates the size of the space occupied by various types of carbon black. The larger the manufacturing size is, the greater the performance density is. Conversely, the smaller the manufacturing size is, and the dispersion of carbon black is affected.