In the Internet era, many consumers will choose water-based wood paint to renovate furniture at home! However, some customers will encounter the phenomenon of adhesion between paint films, paint films and packaging, and the surface of paint films will change significantly . So why is there such a phenomenon of sticking back? Let's analyze it together!

Causes of back stickiness in waterborne wood paint

1, dry conditions do not meet the requirements

The drying conditions of water-based paint need to be reasonably set according to the requirements of the coating. The heating method of the solvent-based paint cannot meet the requirements of drying the water-based paint. On the one hand, necessary dehumidification treatment must be performed to ensure constant temperature and humidity in a dry environment; on the other hand, ventilation treatment is required. If the air does not flow, the vapor pressure at the liquid-air interface is easily saturated, which will delay the inside of the coating film. The normal volatilization of water eventually leads to poor drying of the coating film and back sticking.

2, paint film is afraid of heat and pressure

The coating of water-based paint should be packed after drying. If furniture pieces are directly stacked on top of each other and the storage temperature is too high, it will cause the coating film to stick back. On the one hand, water-based paints contain a certain amount of film-forming aids, which have high boiling points and slow volatilization. On the other hand, water-based paints are thermoplastic, and when the ambient temperature is higher than the glass transition temperature of the coating film, the coating film will become soft and overlap. Pressure will produce indentation. Therefore, the correct method of stacking is needed.

3, one-time coating film is too thick

Water is one of the main components of water-based paints. The latent heat of volatilization of water is 3 to 4 times that of solvents, which is more difficult to evaporate than solvents. At the same time, after the surface of the coating film dries, it will “lock” the moisture inside the coating film, further reducing the The rate of volatilization of residual moisture in the film, which affects the normal drying of water-based paints.

4, the coating film is not completely dry

The drying of water-based paint involves the volatilization of film-forming auxiliaries and water, the diffusion and self-crosslinking of emulsion molecular chains, and the chemical reaction of functional groups. It is a complex physical and chemical process. At the same time, the drying of water-based paint is affected by many factors. Therefore, whether the water-based paint is completely dried will greatly affect the anti-sticking performance of the water-based paint.

Therefore, when painting water-based wood lacquer, remember to apply when the weather is fine. Brush thinly during the construction process, and keep it dry after ventilation.