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The principle of high-pressure airless spraying is through a booster pump (usually a plunger pump) to pressurize the paint (up to 210KG/CM2 or even higher), obtain high-pressure paint through the high-pressure pipe to a special high-pressure gun, and from special The nozzle releases pressure and achieves the purpose of dispersing and atomizing, and it is coated on the object at a high speed. Since the paint atomization does not require compressed air, it is called airless spray. This kind of spraying technology has been widely used since it was invented by Graco in 1952, such as automobiles, airplanes, construction machinery, trains, ships, containers, and so on. With the continuous development of architectural coatings, high-pressure airless spray technology is gradually applied to the construction industry, such as latex paint, oil paint, water-based paint, resin paint, etc. And get popular in foreign countries.
The advantages of high-pressure airless spraying are as follows:
1, excellent surface quality. The paint sprayed on the wall forms a smooth, dense coating with no brush mark. This is unmatched by brush and roller.
2, high coating efficiency. Single-man operation spraying efficiency up to 300-500 square meters / hour, is 10-15 times that of artificial brushing.
3, delay the life of the coating. High pressure airless spray, it uses high pressure spray atomization, so that the paint particles get strong kinetic energy deep into the wall pores, so that the paint film and the wall to form a mechanical bite, enhance the coating adhesion and prolong life.
4, brushing, roller coating thickness is very uneven, generally between 30-200 microns, the utilization rate is low. The airless spray coating has a uniform thickness, a thickness of about 30 microns, and a high utilization rate.
5. The corners and gaps can also be well painted. Because the paint spray does not contain air, the paint can easily reach these locations.
How to determine the effectiveness of latex paint wall construction:
The merits of judging the effect of latex paint wall surface construction can be examined from the following points:
1, the surface effect
Uniform color over large areas, uniform coating.
2, scrub resistance
High-quality latex paint wall can be wiped without wet powder, which is an important indicator to measure the life of latex paint. At present, the construction method of latex paint is very backward, generally using brush and roller construction. This results in:
A, brush marks, hair removal, uneven.
B, glossy latex wall surface becomes dull.
C. Severe flouring of the wall.
The main reasons for the above are:
a. Over-dilution
Due to the high viscosity of the latex paint, hand brushing behind it is harder to brush off and the brush mark is noticeable, so it has to be diluted with water. General latex paint can be diluted 10% -30%, and they can be diluted up to 60% -100%.
b.
To prevent sagging due to over-dilution, 107 glue is often added to latex paint.
As a result of the above non-standard operations, the quality of the wall surface has been reduced, and adhesion, scrub resistance, and texture have been greatly damaged. Serious and even matte paint turns into white paint, low light becomes no light, and high light becomes low light.
Therefore, since the selection of high-quality latex paint, of course, hope to obtain high-quality wall coating effect why not learn from the successful experience of foreign latex paint construction - high pressure airless spray it? The high-pressure airless sprayer atomizes high-viscosity latex paint to make your home perfect.
So when you use high-quality latex paint to decorate the wall, don't forget to choose advanced construction techniques.
With economic development and changes in people's concepts, it has become fashionable to use domestic and foreign high-grade interior and exterior wall coatings instead of mosaics and ceramic tiles to decorate walls. Water-based emulsion paint, as it is non-toxic, easy to clean, rich in color, and does not cause pollution to the environment, has begun to become the most popular interior and exterior wall decoration materials. But latex paint is a very viscous water-based paint. During the construction, the manufacturers generally have very strict restrictions on the dilution of the original paint with water, generally 10% to 30%. The transitional dilution will lead to poor film formation, and its texture, scrub resistance and durability will be damaged to varying degrees. The degree of damage is proportional to the dilution, and the greater the dilution, the poorer the quality of the paint film. If strictly according to the manufacturer's dilution requirements, then the viscosity of latex paint is high, and construction is difficult. If using roller, brush or air spray construction, the paint effect is difficult to satisfy. The most popular way abroad is to use high-pressure airless sprayers for construction.