Coating knowledge: introduction to the production process of waterborne wood paint

Core tip: the production of waterborne wood paint is a simple physical mixing process The key problem is that each component should be completely mixed evenly in the production process, and this uniform state should be guaranteed in the storage period until the end of coating construction The whole production process is as follows 1 in the clean paint pot or cylinder, it is called the resin emulsion or dispersion which is prescribed by the human formula, and the mixer is activated to slowly mix the emulsion at a speed not exceeding 300r/min 2 Slowly add the excess water after deducting the water required by the pre configured auxiliary agent from the formula into the mixing container The water needed in the production must be deionized water or distilled water, and the raw water shall not be used Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Paint Home News: the production of waterborne wood paint is a simple physical mixing process The key problem is that each component should be completely mixed evenly in the production process, and this uniform state should be guaranteed in the storage period until the end of coating construction The whole production process is as follows 1 in the clean paint pot or cylinder, it is called the resin emulsion or dispersion which is prescribed by the human formula, and the mixer is activated to slowly mix the emulsion at a speed not exceeding 300r/min 2 Slowly add the excess water after deducting the water required by the pre configured auxiliary agent from the formula into the mixing container The water needed in production must be deionized water or distilled water, and no tap water, well water or river water without purification shall be used It is necessary to add water and additives in the form of trickle or trickle It is not allowed to add a large number of additives in one time, so as to avoid stratification, caking and other phenomena Stir for 5-10min after adding 3 Dilute the mildew inhibitor with 3-10 times of water in advance, and the thinner the mold inhibitor is, the better Slowly add the diluent to the mixing container, then fly, mildew inhibitor, and mix while adding, which can properly increase the rotation speed of the mixer, accelerate the decomposition process, and mix for about 5-10min Some fungicides are added directly to the emulsion to produce gel blocks, which are difficult to disperse So the principle of adding mildew inhibitor is: the concentration should be as low as possible, the adding should be as slow as possible, and the stirring should be as fast as possible 4 Add wax oil and stir for 5-10min Wax emulsion is easily mixed with resin emulsion 5 Add the film forming agent directly into the mixer, increase the rotation speed to 500 ~ 800r / min after adding, and stir for 10 ~ 20min The film forming assistant can be added alone or mixed with wetting agent, surface modifier, all or part of defoamer in advance 6 Add wetting agent, surface modifier and other additives, and mix for 5-10min at 300-500r / min 7 Add thickener Thickening agent is diluted with water or film-forming agent in advance, adding speed should be slow, otherwise caking will occur easily, which can not be stirred for a long time Stir for 10-15min 8 add essence Stir for about 3-5min The stirring speed can be reduced to 300 R / min to reduce the volatilization of spices The emulsion or dispersion of waterborne wood lacquer is generally weak alkaline, so it is no longer necessary to adjust pH If pH is low, PH regulator can be added to mediate pH to slightly alkaline, preferably between 7.5~9 9 If there is some defoamer left in front, add it to do the final defoaming 10 After all materials are added, mix for 10-15min During this period, the mixing speed gradually decreased from 300-500 R / min to 100 R / min until the end of mixing, and the finished product 11 Sampling inspection, including appearance inspection, viscosity measurement and solid content measurement of waterborne wood paint, observation of leveling, sagging, shrinkage cavity, bubble and edge expansion of paint by painting sample plate, thermal stability test at 50 ℃ for reserved samples and observation of other abnormal phenomena Filter the package after it is qualified 12 Pump the materials into the filter, filter them through a 200 mesh (preferably more than 300 mesh) filter screen, and then repack them 13 Each batch of paint must be reserved for sample storage and inspection 14 After production, clean all equipment and pipes with tap water for further production Water diluent paint refers to the paint prepared by emulsion emulsion for film forming The solvent resin is dissolved in organic solvents Then, with the help of emulsifiers, the resin is dispersed in water to form emulsion by strong mechanical agitation It is called post emulsified emulsion, and the paint made can be diluted with water in construction Water dispersive varnish mainly refers to the paint made of synthetic resin emulsion as film forming material Emulsion is a dispersed emulsion composed of small particles dispersed in water in the process of mechanical stirring when unsaturated vinyl monomers are polymerized at a certain temperature Paint with a small amount of emulsion in water soluble resin can not be called latex paint Strictly speaking, water diluted paint can not be called latex paint, but it is also customarily classified as latex paint Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,