1. The selection of the products.

1, choose a good after-sales service home market or paint shop to buy, and find that quality problems can be changed in time.

2, the goods should be sold at three stores. The same brand, the same package of paint should be considered from the aspects of price, quality and service.

3. Solvent-based wood coatings have high gloss, bright, matt, flat, consumers can choose according to the decorative effect of the family and their hobbies.

4, the quality of the polyurethane paint is not only in conformity with the standard of the national standard or the technical supervision department, but also conforms to the technical indexes stipulated in the compulsory national standard GB18581-2001 "the limit of the harmful substances in the solvent based wood coatings for interior decoration materials".

Two. The use of the product.

1. Before use, it should be strictly carried out according to the proportioning in the instructions and diluted to the construction viscosity by adding matching diluents according to the construction requirements.

2. After each component is blended, it is stirred and left for about 15 minutes to facilitate the pre-ripening reaction between the two components and eliminate the bubbles generated during stirring.

3. When spraying or brushing, the film thickness should be strictly controlled. The wet film with excessive thickness has a long drying time and is easy to absorb moisture from the air to make the film whiten and foam.

4. Attention should be paid to the control of interval time between layers during construction. Short interval between layers can easily cause blisters, wrinkles and whitening of coating film.

5, the use of polyurethane paint curing agent to be sealed, so as to avoid long-term contact with the air curing failure.

6. Avoid construction in rainy season and high humidity. Especially in high humidity weather, spraying is easy to cause whitening.

7. In the rainy weather, the door can not be stacked and stacked, so that the surface of furniture will become mouldy and blackened.

8, latex paint is mostly used for brushing walls, polyurethane resin coatings are mostly used for painting dash, furniture, doors and other parts. Some polyurethane resin coatings contain more free TDI, which will cause yellowing of latex paint during the process of brushing and volatilizing. Therefore, it is necessary to avoid the construction of latex coatings and polyurethane resin coatings at the same time. It is best to brush the latex paint after the polyurethane resin coating is completely dry, which can avoid the phenomenon of yellowing.

9, the storage period of polyurethane paint is usually 1 years. When buying, it will shake the iron bucket vigorously, and there should be a sense of oscillation in the barrel. If there is no sense of oscillation, paint curing and failure.

Three. After painting and finishing, furniture should be maintained according to the following methods:

1. Furniture after paint brushing and drying, do not put in the window or door of direct sunlight, in order to avoid long-term exposure to ultraviolet light, resulting in paint dry cracking powder.

2, paint good furniture, strictly prohibit the long-term coverage with plastic cloth or newspaper. Lest the paint film is sticky and lose its gloss.

3, furniture dirty dirt can be dipped in a small amount of detergent or detergent to wipe, and then clean with clean water and rag.

4, furniture should avoid carving with sharp tools, and do not collide with other hard objects.

5, boiled water cup, hot rice pot is best not to directly contact with coated surface, the use of pads, so as not to burn the paint film.

6, the furniture's paint film damage place, should fill the paint in time. In order to avoid the expansion of wood, resulting in blistering and peeling.

Four. Problems in the construction process:

1.

Vertical construction, part of the paint has flowing phenomenon, light as a tear hanging, heavy as a curtain droop, this is the flow hanging. The causes of this phenomenon are as follows: (1) too thin coating, too fast curing time, too low the temperature of construction environment (4) too much paint brush paint, too much spray paint, the nozzle diameter is too large, and the pressure of the spray gun is not uniform. Control measures: (1) controlling the construction viscosity between 14-25s (lower in summer and high control in winter). (2) the construction environment temperature is kept in the range of 20-30 C as far as possible.

2, coloring

After brushing the top coat, the solvent in the top coat dissolves and precipitates the primer and some pigments, and seeps into the top coat, then causes the color seepage phenomenon. To prevent infiltration, it is necessary to wait until the bottom layer is dry before constructing the topcoat.

3.

Whitening is often a problem with polyurethane paint. In such cases, most of them are caused by improper construction. After painting with polyurethane paint, sometimes the phenomenon of white mist appears on the film, which is called whitening. The main reason for the whitening of paint film is the relative humidity of the air is too large. The construction environment temperature is relatively low and the relative humidity is large (generally greater than 80%). In the paint, the solvent content is high and light, and the surface temperature of the film is reduced when the evaporation is volatilized. The wet air condenses on the surface of the paint film, causing the paint film to be white, and the paint film is too thick. There is a small amount of water in the spraying system and dilution solvent, and it can also make the film white. After whitening, it can be sanded with fine wood sandpaper, and then removed after flotation.