Application of water-based environmentally friendly coatings in coatings.

Guide
China's automobile production increased year by year, promoting the prosperity and development of the automotive coating industry: with the strengthening of China's industrial production awareness of environmental protection, water-based environmental protection coatings have gradually been widely used. This paper will provide reference and suggestions for coating work by exploring the application of water-based coatings (processes, etc.) and the application prospects of water-based coatings.
Water-based environmental protection coatings in the application of
in the application of water-based environmental protection coatings, the body surface parameters need to be reasonable control, and clear its process requirements, to ensure the effect of coating, to play the maximum efficiency of water-based environmental protection coatings . R'WO.35 (cut off 2.5, cut off is the critical value, is the criterion for judging the test results) is the parameter requirement for capacitor roughness in coating; Wind speed control range, in the process of spraying can be applied two-stage dehydration process, in order to ensure good dehydration effect and water dispersion, should be appropriately reduced heating slope and maintain the softness of the heating hot air; Om/s, control the heating section of the dehydrated oven hot air flow rate of 1.0 to 1.25m/s; Control, insulation section surface iron temperature should be about 707, the temperature inside the door is about 65t, reasonable control of BC2 to dehydrated oven temperature flash drying time, generally about 3min, in the body into the varnish inner plate spray area in the process of going through a strong cold zone, the inner plate temperature should be below 35T, the outer plate temperature should be below 30T.
in the medium-coated oven, in order to avoid the direct high temperature caused by bubbles and other problems, the need for low-temperature pre-baking, followed by high-temperature baking curing treatment. In order to ensure the effective evaporation of coating moisture, it is necessary to continue at about 5min in 80t environment, and the heating stage is controlled at about 160t for curing. In the construction of the primer flash drying oven, the water content of the control paint film is about 10%, to prevent the dehydration rate is too low or too high caused by the paint film pinhole and varnish construction effect is not good. In the flash drying oven set insulation zone, heating zone, inlet end air seal, export end air seal and strong cold zone. The dehydration rate test was carried out to determine the water content of the coating film passed through the flash drying oven to determine whether the flash drying oven was up to standard.
Water-based bad protection coating application prospects
In China's coating work, the scale of application of water-based environmental protection coatings is gradually expanding, especially with the improvement of China's industrial development level and scientific and technological progress, water-based environmental protection coatings are used in many areas of society. Solvent-based coatings are fading out of people's vision, the use of water-based paint is conducive to the implementation of China's low-carbon concept. Solvent-based medium coating and solvent-based primer and single-component hood varnish process system are the main modes used in the current automotive coating line. With the continuous improvement of the performance of water-based environmental protection coatings, the process of using stainless steel materials, color paint and varnish reserved intermediate drying areas in the medium drying area of the medium coating drying room is gradually used, which greatly meets the process standards of water-based environmental protection coatings, and is an effective way to improve the coating efficiency and play the environmental protection performance of water-based paint. For solvent-based medium paint for a reasonable transformation, can effectively achieve the application of water-based paint.
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