The people in Hunan are not very hot, and even chili does not have any food. "The Analects" says "people do not have faith, I do not know it can be", probably means that if you say that there will be chili in the dish but not credit, do not know what this person can do. The paint is like a pepper to a Hunan person for decoration, which is an integral part of the decoration. However, the paint “bad temper†is not good, like to cause trouble everywhere, it really makes people headaches. Here are the top ten common questions for your inventory of the paint construction.
One of the nine major "odor problems" and particles in paint construction
1) The construction tools are not clean and the new brush is dusty. The old paint brush is used to keep the paint from being washed in time, and the paint equipment is not clean.
2) The construction environment and construction personnel are not clean, the coating is not clean or in construction weather, and the surrounding environment is poor, so that impurities such as dust, grit, yarn, etc. can fall into the paint, or soak in the dry paint film. The film is granulated.
3) Poor dilution of the paint thinner causes precipitation of resin components in the paint. For example, when a semi-mute clear finish or a clear primer, the diluent leaks or has a poor dilution ability.
Solution: Add a strong solvent such as butyl acetate and cyclohexanone to the thinner, mix it with paint, and filter it.
Commonly used nine paint “smells†two, shrink paint
1) The surface of the object to be coated is contaminated (dust, sweat, oil, wax, etc.) and moisture. For steel workpieces cleaned with a solvent and painted, for wooden furniture, first wash with soap and water, then dry with water after drying, and then paint.
2) Sprayed compressed air contains oil or water.
3) The surface of the object to be coated is too smooth and the surface is blasted and polished.
4) The two-component coating sometimes undergoes immediate coating after uneven adjustment, and shrinkage fermentation also occurs. After the paint is fully conditioned and ripened, paint it again.
5) High temperature in summer will greatly increase the rate of solvent evaporation in the paint, leading to uneven dispersion of the additives in the paint film, resulting in solutions, reducing construction humidity or adding strong solvents with slow volatility such as cyclohexanone.
6) Paints are not matched. When using different paint primers for polyester lacquers, the auxiliaries used by the manufacturers are not necessarily compatible systems. Sometimes, they will cause shrinkage.
The common nine major “odor problems†in paint construction and wrinkling
1) If the driers do not mix well with or add too much, the inner and outer layers will not dry uniformly and will cause wrinkling.
2) Thick coating and pouring coating, among which C04-42 alkyd enamel coating is the most representative. The thick coating of C04-42 alkyd enamel will cause wrinkling and slow drying.
3) Exposure temperature is too high after exposure to strong sunlight.
4) Slightly bite the bottom.
Paint construction common nine "odor problems" four, cracking
1) The paint itself has poor weather resistance and is not easy to use outdoors. For example, after the phenolic white blending and brightening aluminum powder used outdoors in summer for 1-2 months, cracking may occur.
2) Thick coating and floor coating are applied in the course of the use of thick coating. The possibility of pouring paint to crack the paint is greatly increased. Generally speaking, the total amount of paint used per square meter does not exceed 0.8 kg, cracking It is unlikely.
3) The proportion of curing agent is too high, or the hardness of the paint itself is high and the toughness is insufficient.
4) The bottom layer itself is loosely cracked, causing the upper paint film to peel off and crack.
Commonly used paint construction nine "odor problems" five, slow drying, sticky
1) The surface of the object contains oil, water vapor causes slow drying, or the plasticizer in the plastic penetrates into the paint.
2) Improper diluents used, such as oils, diesel thinners and other difficult volatile substances brought into the paint, can make the film caused by sticky and slow drying.
3) thick coating thick coating on the impact of polyurethane paint is not very prominent, and alkyd, phenolic is very prominent, constant temperature and pressure under 20 microns of C04-42 white alkyd enamel, 18 hours can be dry, but when Its film is 50 microns, three days can not be completely dry, and prone to wrinkling phenomenon, for this kind of paint, it is better to paint a few more, not too thick at once.
4) Oxidized primer, putty, or primer paint is then applied to the second coat to cause interlayer separation, air drying, and solvent evaporation are blocked, thus causing the paint film to slow dry.
Paint construction acceptance
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