Precautions for the construction of furniture coatings in autumn!

"September Festival, the dew is cold and will condense also"; In the cold dew season, the autumn in the south is getting stronger, the air is cool and cool, and there is little rain and dryness; The vast area of the north has entered the late autumn

Autumn is dry, the air is dry and stuffy, which brings discomfort to people's body sensations and is also a test

For paint construction, in autumn and winter, affected by external factors such as temperature and humidity, paint film drawbacks, rework and other phenomena often occur, which brings certain troubles to furniture painting coatingol.

Control temperature and humidity

The temperature in the construction environment can not be lower than 5 ° C, the humidity can not exceed 80%, when the temperature is lower than 15 ° C, it is recommended that the construction and drying room carry out the necessary heating and heating measures; When it is below 5 ° C, the paint can be pre-placed in the greenhouse for pre-heating before use

Suitable diluent

According to the temperature change in the drying room to choose the thinner, when the temperature in the drying room is lower than 20 ° C, use the winter thinner, and when the temperature in the drying room exceeds 20 ° C, use the summer thinner

Do not radically dry

PU paint according to the supporting curing agent, thinner for deployment, may not arbitrarily add more curing agent, the use of fast drying curing agent or the addition of drying agent to speed up the drying speed, so as not to cause delamination, cracking and other paint film drawbacks

The bottom is good

At low temperatures, the PU solid primer is easy to crack due to alternating temperature difference between hot and cold temperature, and the expansion and contraction deformation of the substrate, especially in the connecting parts

Before coating the PU solid primer, it is necessary to fully seal it with a special sealing primer, and choose to choose a good flexibility PU solid primer product for coating, and ensure adequate drying

Reasonable deployment

PU topcoat should be adjusted according to the coating characteristics of different furniture and temperature and humidity changes to ensure that the construction viscosity, wet film thickness is appropriate, the drying speed is balanced, and the coating effect is stable

Avoid one-time thick coating

Autumn paint reaction speed slows down, one-time thick coating during construction, not only can not improve the coating efficiency, but will bring potential hidden dangers, such as slow drying, bottom biting, whitish and other paint film drawbacks

Heat up appropriately

At low temperatures, adding excessive blue and white water will cause pinholes, cracking and other lacquer film drawbacks; When the construction environment is below 10 ° C, the PE primer will dry slowly, and taking appropriate heating is the best solution