Since the film is a medium for separating molecular level filtration of a solution or a mixed gas when contacted with the membrane under pressure, or electric field, or under the action of temperature difference, certain substances can pass through the membrane, while the other of these substances is selectively intercepted, so that a solution of different components, or a mixed gas of the different components are separated, it is different in that the filter with the conventional membrane can be separated in the molecular range, and this process is a physical process, and without the occurrence of phase change adding additives. Membrane pore size is typically micron, according to their different pore sizes (or molecular weight cutoff), the film can be divided into microfiltration membrane, ultrafiltration membrane, a nanofiltration membrane and a reverse osmosis membrane, depending on the material, it can be divided into an inorganic film and an organic film, an inorganic film mainly ceramic membrane and the metal film, its low filtering accuracy, selectivity is small. The organic film is made from a polymer material, such as cellulose acetate, aromatic polyamide, polyether sulfone, polyvinyl fluoride polymers and the like.
Application of electrophoretic coating film
Optional application of membrane function
Coating application pretreating microfiltration membrane Group
Group by using an ultrafiltration membrane microfiltration or ultrafiltration technology to achieve the purpose of degreasing the oil-water separation process
Group reverse osmosis membrane pure water using reverse osmosis technology obtained was rinsed
Application of the anode (cathode) electrodeposition coating film on the anode (cathode) removing electrophoretic electrodeposition coating paint solubilizing or neutralizing agent (typically an organic acid) as a counter electrode, the chemical equilibrium of the system is maintained.
After electrophoresis cleaning application
Ultrafiltration group
1, to improve economic efficiency, after electrophoresis "closed loop" cleaning mode, improve the utilization of the coating;
2, to reduce dirt washing water, the sewage treatment capacity and reduce costs, are environmentally friendly;
3, remove impurity ions, purifying bath, to improve the quality of the coating.
Group reverse osmosis membrane
1, to improve the recovery rate of electrophoretic paint
2, to reduce the burden on wastewater treatment
3, to achieve a closed loop rinsed
4, to reduce the amount of water
Application of ultra filtration membrane recycling electrophoretic coating process:
Ultrafiltration (UF) is a solution capable of purifying, concentrating or separation through membrane separation technology, to be understood screening process ultrafiltration membrane pore size related. A pressure difference across the membrane as the driving force to membrane filter media, at a certain pressure, when the solution flows through the membrane surface, allowing only water, inorganic salts and small molecules through the membrane, while preventing water suspended solids, colloids, proteins and other macromolecules, and microorganisms, in order to purify the solution, separation and concentration purposes. In ultrafiltration, the macromolecular solute like other reason can not easily pass through the membrane as a solvent, mainly because of the following several reasons:
① are adsorbed on the surface of the filtration membrane and the hole (suction base);
② is retained within the bore hole or be discharged from (blocked);
③ is mechanically retained on the filter membrane surface (screening).
