What is the reason why the newly made furniture paint blisters in less than a year and how to solve

Reasons: First, the grinding is not thorough before brushing, and there are impurities on the surface, resulting in gaps on the contact surface.

Second, the curing agent in the paint is added, the paint is too hard, and the drying speed becomes faster, so that the paint film and the surface surface of the paint are easy to separate.

Third, the way of drying is incorrect, after the sun or high temperature and other artificial drying, it is easy to make the paint react, affecting the effect.

Fourth, stir unevenly. After mixing the curing agent and thinner, it is not shaken and stirred, resulting in foaming in the paint oil, and there will definitely be bubbles after brushing, and then with the temperature change, the bubbles become more and more obvious.

Fifth, there is a problem with the paint itself, it may be too long, close to or beyond the shelf life, the effect must be bad, and it must be re-worked.

Re-polishing--batch ash--re-polishing--primer--topcoat, if you want to have a good effect, do two bottoms and two sides, polish in place, and choose a good paint.

The main causes of paint blistering are water salt penetration, water solvent penetration and other reasons.

1. The substrate is not clean, and the paint cannot wet the substrate well.

2. Construction when the relative humidity of the air is high.

3. The thickness of the paint film for a construction is too thick.

4. The temperature difference between the substrate and the surrounding environment is large.

Due to the polarity of the water, including the penetration of water vapor in the air, the water vapor under the paint film will coalesce together under the paint film, and form a bubble when the temperature is high, and such a bubble generally contains water.

There is also a dry bubble, which is the solvent in the paint that has not yet volatilized

1. There is relatively more rain in summer, especially during the rainy season, after each rain, due to the evaporation of water and the air humidity is particularly large, spraying paint is very easy to white, and nitro paint is particularly obvious

1. Add an appropriate amount of anti-white water (no more than 8% of the total amount of thinner) when mixing paint;

2. Dehumidify the construction site before brushing.

Paint is easy to blister in hot weather, and painters generally use less reinforcing agent to avoid blistering, and some people even only add 50% of the standard amount! In fact, this is a misunderstanding, reducing the curing agent can not actually avoid paint blistering, but will lead to incomplete paint reaction resulting in soft paint film, poor adhesion, if it is a primer, it is easy to cause the phenomenon of biting the bottom, if it is a high-grade topcoat, it will also cause unstable gloss.

2. The main reason why the paint is easy to foam in summer is that the surface of the paint film dries too quickly, and the method of adding an appropriate amount of slow-drying water to the thinner is generally used (generally not more than 10% of the thinner);

Even with less reinforcing agents, it is recommended not less for primers and semi-matte topcoats, and no less for glossy topcoats. Bright clear topcoats are especially prone to prickly heat and pinholes in summer.

The reason is: after the paint is sprayed, due to the high temperature and fast volatilization, the surface layer of the paint quickly forms a film, and the thinner below the surface layer that has no time to volatilize penetrates outward to the surface layer and is blocked to form a small hole similar to a needle tip.

The only way to solve this problem is to reduce the speed at which the paint dries.

For example, reducing the ambient temperature and using slow-drying thinner, etc., reducing the curing agent can only prolong the hardness rise time of the paint, but not the drying time, so it cannot effectively remove the prickly heat.

3. There are more mosquitoes in summer, and it is easy to fall on the surface of the paint film in the process of paint drying, resulting in paint rework, it is recommended to do the following points when reworking:

1.Polishing should be thorough. Wax paste is generally added to the topcoat to increase the smoothness of the feel, and if the topcoat is not fully sanded before recoating, it will lead to delamination;

2.Sandpaper should not be too coarse when sanding, we found that many masters use 240 or 320 sandpaper or even thicker in the process of doing service, and the coarse sand marks require recoating the paint film to be thicker, resulting in poor transparency, and finally the color of the panel is inconsistent when put together; In contrast, the use of imported sandpaper above 320 sandpaper, although the surface of sandpaper is more expensive, the actual recoating of the topcoat only needs a thin layer, so that the paint is saved, and the surface recoating is not obvious.

Fourth, large factories generally have winter and summer diluents, and it is best to use the corresponding diluents in high temperature weather to make it easier to construct.

There are many reasons for paint blistering (paint, thinner, construction, environmental, etc.), you search on the Internet, and then determine what the cause is, when it is not clear, let's discuss it.

The surface of furniture is generally coated with paint, but in the hot summer, the paint film on the surface of many furniture will blister, and the countermeasures to solve the blistering phenomenon of paint film on the surface of furniture:

1. The wood should be dried to a suitable moisture content, and the aromatic oil or pine resin in the wood should be removed;

2. The putty and base coating should be fully dried, and then the surface coating should be brushed;

3. The voids and wood holes at the wood joint should be filled with putty, and then painted after grinding and smoothing;

4. It is best to use a clean rag to clean up the debris on the surface of the substrate, do not touch it with your hands, and the painted surface after cleaning it can be painted;

5. The construction viscosity of the paint should be appropriate;

6. Don't drag back and forth when brushing, first horizontally, then vertically, and finally straighten along the direction of the wood grain;

7. Regularly discharge the water in the compressor and install an oil-water separator;

8. Refer to the countermeasures of pinholes;

9. For slight bubbles, you can wait for the paint film to dry thoroughly, polish it with sandpaper, and then repair the topcoat. For serious bubbles, first pick up the bubbles, carefully polish and clean them with sandpaper, and then repair them layer by layer according to the coating process.

In general, it is difficult to repair well, so it is recommended to renovate it. It is to remove the entire surface of the bulge and re-polish the paint. It's going to be a little more cumbersome. Here are some things to keep in mind when patching.

1 Most of the paints used in wooden furniture are oil-based, so you can put on old clothes and gloves and spread old newspapers on the floor before painting.

2 Choose a sunny day and paint the wooden furniture so that it dries faster.

3 Primer before painting new wooden furniture. Since wood has fibers, the fibers will be pulled up after painting, resulting in a rough and unsightly feeling. Therefore, you need to apply a layer of primer first, and then smooth it with sandpaper to paint the color you like.

5 If the old paint has fallen off severely, it is best to scrape it off before painting, if the surface is rough, it should be rubbed with coarser sandpaper first, and then wiped with a soft cloth dipped in pine perfume. If you want to paint different colors, you need to apply a layer of primer first, and then apply another layer after drying.

6 When painting the door, first paint the uneven façade, and then paint the flat area. The finishing method of the table and chair is to start with the legs, start with the bet, and then brush the chair surface and back.

There are many types of furniture paints, and the construction process of each paint is different, so it is difficult to explain them one by one here. I'll start with a brief answer to LZ's question.

1. What is a primer?

Answer: The primer is the first layer of the paint system, which is used for the color finishing of the wood surface, improving the adhesion of the topcoat, increasing the fullness of the topcoat, providing anti-corrosion function, etc., and at the same time can ensure the uniform absorption of the topcoat, so that the paint system can play the best effect.

2. What is overcoat paint?

Answer: Overprint paint is generally used in automobile painting, and the surface of furniture is topcoat, which focuses more on the final decoration and appearance effect to improve the fullness and gloss of the paint surface. At the same time, it also improves the hardness of the paint surface and enhances the anti-corrosion, wear resistance and high temperature resistance of the paint surface.

3. Are the two varnishes unrelated to each other?

A: These titles are not the same concept. Varnish, also known as van water, is a coating composed of resin as the main film-forming substance and solvent.

Because both the paint and the coating film are transparent, it is also called a transparent coating. It is applied to the surface of the object and dries to form a smooth film, revealing the original texture of the surface. The varnish is mainly divided into two categories: oil-based varnish and resin varnish, which has the characteristics of transparency, gloss, fast film formation, water resistance, etc., and the disadvantages are that the hardness of the coating film is not high, the heat resistance is poor, and it is easy to turn yellow under the action of ultraviolet light.

The primer and topcoat are basically primers and topcoats in many types of paints, such as polyurethane paint, unsaturated polyester paint, and are divided into primer and topcoat due to the difference in construction processes.

4. What is used for dilution of the two? How to master the effect of spray painting?

A: The thinner of different paints is different, and the coating process is also very different.

5. What kind of lacquer is affordable?

Answer, nitro paint is cheaper, and its construction technology is relatively simple.

6. If you spray matte white paint for home decoration, do you not need primer and varnish?

A. You can use primer and topcoat.

The commonly used varieties of wood paints are grease paint, natural resin paint, phenolic paint, alkyd paint, acid-curing amino alkyd paint, nitro paint, acrylic paint, polyurethane paint, unsaturated polyester paint and ultraviolet curing paint. It is characterized by fast drying at room temperature, bright and plump, dazzling, high hardness and wear-resistant.

Peculiarity. 1. Phenol high aldehyde paint dries quickly, has high hardness, is water-resistant and wear-resistant, but is brittle and easy to yellow.

2. Nitro paint is wax gram, which dries quickly, the paint film is firm and hard, wear-resistant and the wood grain is clear, but the fullness of the paint film is poor.

3. The alkyl ester paint is easy to construct, firm in adhesion, bright and plump, and is often used in the decoration of outdoor wood products such as doors and windows, railings, and steel structures. However, its coating film is soft and has poor water resistance, so it is not suitable for use on floors and desktops.

4. The advantages of unsaturated polyester paint are good fullness, fast drying speed, and suitable for industrial assembly line production.

5. Polyurethane paint has excellent hardness, toughness and wear resistance, and strong decoration, but contains TDI.

The most basic paint application process:

1. Grinding. 2. Use putty to repair defects, holes, cracks, and nail holes.

3. Grinding. 4. Spray primer.

5. Fill the putty.

6. Grinding. 7. Spray topcoat.

A summer rain is relatively more, especially during the rainy season, every time it rains after the coarse due to the evaporation of water, the air humidity is particularly large, the spraying paint is very easy to white, and the nitro paint is especially obvious to burn pants