Pigment Manufacturing
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Pigments are colorants that are not soluble in the host material and scatter light and are therefore opaque. Pigments can be organic or man-made and derive from animals, plants, rocks or minerals and metal oxides, like for example titanium oxide.
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Generally, pigments and paints are not bound chemically to the covered surface, water-soluble dies react with fibers in a mordant bath. Apart from colored, decorative paints, white and black pigments have high importance. White titanium dioxide plays an important role in the painting industry, due to its stability, high covering effect, and UV-light absorbing property. Approximately 4.6 million tons of TiO2 pigment are produced annually worldwide, and its use continues to rise. On the other end of paints, carbon black is essential as a toner of the laser printer and filler in tires and other plastics, also due to its stability and UV-light absorbing capability.
Pigment manufacturing process
Natural sources of paint lost their importance. Lead oxide pigment dispersed in oil was widely used as primer paint, due to its excellent anticorrosive feature. Since heavy metal lead is poisonous, this red paint is nowadays forbidden. Indigo was extracted from plants cultivated in Asia, nowadays the blue die for denim cloth coloration is synthesized almost exclusively by the chemical industry. The coloring materials were solved in organic solvents, benzene, toluene, xilols, turpentine, and nitro thinner. All these solvents pollute the environment, and some of them are carcinogens. Nowadays water-based products are common; however most part of paints are not water-soluble. In order to avoid segregation, stable dispersion should be formed where the pigments do not sediment.
In order to eliminate solvents, powder coating is used for painting and decorating vehicles and other metal surfaces. Pigments are mixed with polymers, then extruded and milled. Classifier mills are preferable for a narrow particle size distribution
High sheer mixing for powder paints
Powder coatings are a solvent-free painting form where pigment is mixed with a polymer, a carrier material that melts in the painting oven so that the pigments adhere to metal objects. Pigments are micronized to have a smooth surface and become miscible with polymer beads. High shear mixing is necessary to break the force of cohesive powders and form polymer-pigment particles avoiding sedimentation in further processing. The video below shows a high-shear mixer for this purpose with a conical shape that provides a vertical upward movement along the wall.
How dispersion improves paint quality
In emulsion paint, the binding agent is dispersed in water. Dispersion as such an important process that has a big influence on the quality of the final product. Dispersing machines process immiscible materials in a high shear chamber, where sharp edge tools of high-speed rotor reduce the size of the paint particles and disperse them into the oily or water base matrix. A rotor can have paddles as well, to serve as a recirculation pump. The video below shows how at the top of the rotor a vacuum occurs, sucking in the ingredients, liquids, and powders.
Which pigment technology do you need?
Jet mill for toner and pigment industries
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Ultrafine classifier for toner and pigments
Achieving precise classification of toner particles and pigments while minimiz...
Dryer for pigments and hydroxides
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Ultrafine powder mill for coatings and pigments
In the production of high-quality coatings, fillers, and pigments, achievi...
Impact classifier mill for fine grinding of brittle materials
In industries such as chemicals, food, and pharmaceuticals...
Energy-efficient impact classifier for superfine grinding
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Super high shear mixer for nano to micron powders
In scenarios where precision powder mixing, particle surface modificati...
Powder synthesis reactors for nanometer and micrometer particles
Industrial production of high-quality powder materials ...
Industrial pan dryer for pharmaceuticals
In the pharmaceutical industry, achieving low residual moisture levels in delicate...
Inline high shear mixing unit for low to medium viscosity products
In various industrial processes, achieving consisten...
Crossflow filtration for microfine to nanoscale suspensions
In many industries, dealing with microfine or nanoscale susp...
Crossflow filtration with sieve filter for difficult suspensions
In industrial processes, separating solids from challen...
Pressure drum filter for fine-grained products
In industries dealing with fine-grained suspensions, achieving an effective...
Industrial drum vacuum filter for filtration and washing
In industries such as pharmaceuticals, chemicals, and mining, ef...
Bead mill for nano-preparation grinding
In the pharmaceutical and coating industries, achieving precise particle size and d...
Spray drying system for heat sensitive products
In industries like food and chemicals, transforming liquid solutions into ...
Efficient grinding and drying mill
In many industrial applications, producing ultra-fine powders with controlled particle s...
Vertical ring-roll mill for pulverizing minerals
In contexts where precise particle size reduction is essential, especiall...
Particle size reduction air conveying system
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Horizontal disc bead mill for liquid chemicals
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Milling and drying machine for fine powders
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Laboratory scale active freeze dryer
The laboratory-scale active freeze-drying is used for dehydrating high-value products ...
Thin film dryers
Dry dissolved or slurried crystallizing or amorphous products to a pourable powder.
Vertical scraper centrifuges
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Pelleting press with overhead drive
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Immersion mill for particle reduction
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Dual-motion rectangular separator for pulp and paper industry
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Ultra fine bead mill for nanosuspensions
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Self-cleaning bead mill for highly viscous materials
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Classifier mill for recovered carbon black
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Industrial liquid filtration system
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Automatic can sealer
If you need to cap paint, glues, and solvents containers and are currently manually placing the lids, yo...
Feeder with flexible wall hopper
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Side bar filter press
Production of dry cakes is required in a variety of industries and robust, low-cost side bar filtration...
2-way diverter valves for pneumatic conveying
Products conveyed through pneumatic conveyor lines often need to be diverted...
Multi-way diverter valve for pneumatic conveying
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Dense phase conveyor for normal wearing materials
Dense phase pneumatic conveying is used for powders, granules, and grai...
Dense phase conveyor for powders and granules
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Wear resistant bends for pneumatic conveying
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Horizontal chemical scraper centrifuge
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Horizontal pharmaceutical scraper centrifuge
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Isolator centrifuge
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Mobile pilot plant centrifuge
The system is perfectly suited for pilot plants as well as small-quantity productions in the f...
Vertical top discharge centrifuge
Discharge solids vertically upward through manual action, optionally using a filter bag o...
Vertical peeler centrifuge
A vertical peeler centrifuge is used to separate solids, usually to separate fine particles from ...
Pusher centrifuge
Pusher centrifuges are continuously operating filter centrifuges and can have several basket stages dependi...