Microbiological control in water-based coatings is as simple as that.

At present, the types of water-based coatings mainly include oil-packed oil, oil-packed water, water-packed oil and water-packed water. With the continuous progress of coating production technology and people's environmental awareness, the most widely used types of coatings for water-packed water, oil-packed oil, oil-packed water and water-packed oil coatings have been phased out. Traditional coating construction technology is relatively complex, and the quality is difficult to control, the final construction effect is not

. Compared with traditional coatings, water-based coatings have absolute advantages and are widely used in the construction coatings industry. The production of water-based coatings can not be separated from water, water is rich in microorganisms. As a result, water-based coatings are contaminated with microorganisms during the production process. In order to improve the quality of water-based coatings, water-based coatings are often added to a certain amount of preservatives. It has been shown that sometimes although preservatives are added, the desired antiseptic effect can not be achieved. If we want to fundamentally solve the pollution of water-based coatings by microorganisms, we also need to fundamentally control the microorganisms in the production process of coatings. The control method is divided into four aspects:
control of water for water production
water is one of the key raw materials of water-based coatings. In general, when the number of bacteria per milliliter of water is less than 100cuf, the water is considered clean. It is important to note that if there is a suitable bacteria in the water for growth on the body, the bacteria may multiply in large quantities in the water. Depending on the type of water used in the production of water-based coatings, the microbial control technology used is also different. For tap water, it needs to be chlorinated and monitored regularly according to seasonal changes, and for deionized water, it is also necessary to use water treatment system to monitor and disinfect its microorganisms on a regular basis. In addition, the right amount of fungicides can be added to the production water to kill all kinds of bacteria, thereby ensuring the quality of the production water.
control of water-based
is the main source of microbial contamination of water-based coatings. The contamination of raw materials is mainly carried out before production, and the quality of the coating is directly related to the contamination of raw materials. Therefore, before production should strengthen the detection of microorganisms in raw materials, and timely take corresponding preventive measures. Microbiological control of raw materials mainly starts from the following aspects:
(1) adds the right amount of preservatives to the emulsion;
(2) regularly monitors the microorganisms in the production of essential additives;
(3) adds adapted fungicides to the raw material thinners.
addition, in the actual production should be stored in a dry, well-ventilated environment, the use of "first-in, first-out" principle to ensure that the quality of raw materials in a relatively stable state. If the regular testing of raw materials found that it has been contaminated by microorganisms, should be added in time for the pre-treatment of raw materials.
control of production equipment
water-based coatings involved in the production of equipment including dispersion equipment, grinding equipment, filtration equipment transfer frame paint equipment. In the actual production process of coatings, if the equipment, pipe microbial clean-up is not thorough will breed a large number of microorganisms, and then into the product. For the production equipment involved in the production process of water-based coatings, the following means are used to control the reproduction of microorganisms:
(1) after each production end of the use of high-pressure water gun cleaning equipment, pipe wall residue materials, to prevent residual materials epithelitis into a protective film of microbial reproduction
; It is worth noting that the equipment and related pipe disinfection treatment should be different from raw materials, water disinfection of fungicides, to avoid the use of the same fungicides due to the resistance of microorganisms lead to sterilization effect
; Prevents the microbicides that remain in the pipes from affecting the next stage of coating production.
control of the production environment
microbial control of the production environment mainly from the air and water aspects, to ensure that paint products are clean and pollution-free. The specific control measures are as follows:
(1) In view of the easy fouling of the conveyor hoses used in production, it is required that each hose should be suspended after use and drained from the liquid in it, to avoid the growth of microorganisms in the liquid left in the hose, and to bring the microorganisms into the storage tank in the next stage of production tasks, so that the product is contaminated;
(2) In the production process should pay special attention to avoid water pipes mixed with other liquid hoses, so that the tube is dedicated,
(3) regularly in the production environment of hoses and transit tools disinfection, cleaning treatment.
In short, for water-based coatings contaminated, should be based on the production environment of water-based coatings, paint characteristics and the use of equipment structure, etc. , accurate positioning of water-based coatings by which microbial pollution, that is, to find the source of water-based coatings pollution, and fundamentally eliminate the source of pollution, to avoid the re-emergence of the same pollution phenomenon.
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