Polyurethane spraying construction is a common construction method, mainly used for thermal insulation, waterproofing, decoration and other aspects. Here are a few common methods for polyurethane spray application:
1. Manual painting method.
The manual painting method is a relatively primitive painting method, which mainly relies on manual painting tools to apply the paint to the surface of the object. The advantages of this method are that it is simple and easy to implement, there is no pollution to the environment, the coating thickness can be freely controlled, and the paint utilization rate is high. However, the disadvantage of the manual painting method is that it is inefficient, the coating quality is unstable, and it requires skilled operation skills and experience. Therefore, the manual painting method is mainly used for small-area and small-batch painting operations.
2. Air spraying method.
Air spraying is a method that uses compressed air to atomize paint and spray it onto the surface of an object. The advantage of this method is that the paint utilization rate is high, the coating efficiency is high, and it can be applied to various shapes and sizes of object surfaces. However, the disadvantage of the air spray method is that the paint concentration is low, the diluent needs to be added, the environment is polluted, and the coating thickness is not easy to control. Therefore, the air spray method is mainly used for large-area and large-volume painting operations.
3. Airless spraying method.
Airless spraying is a method that uses a high-pressure pump to spray paint through a nozzle onto the surface of an object. The advantage of this method is that the paint utilization rate is high, the coating efficiency is high, and it can be applied to various shapes and sizes of object surfaces. At the same time, the airless spraying method has a high paint concentration, does not need to add diluent, has no pollution to the environment, and the coating thickness is easy to control. However, the disadvantage of the airless spraying method is that it requires a high-pressure pump and a special nozzle, the equipment cost is high, and the operation technology is demanding. Therefore, the airless spraying method is mainly used for specialized painting operations.
Fourth, electrostatic spraying method.
Electrostatic spraying is a method that uses an electrostatic field to adsorb paint onto the surface of an object. The advantage of this method is that the paint utilization rate is high, the coating efficiency is high, and it can be applied to various shapes and sizes of object surfaces. At the same time, the coating thickness of the electrostatic spraying method is easy to control, and it is not easy to produce sagging and dripping phenomena. However, the disadvantage of the electrostatic spraying method is that it requires a high-voltage power supply and special spray gun equipment, which is costly, technically demanding to operate, and polluting to the environment. Therefore, the electrostatic spraying method is mainly used for specialized painting operations.
The above are several common methods of polyurethane spraying application, each with its advantages, disadvantages and range of applications. In practical application, the appropriate construction method should be selected according to the specific needs and conditions. At the same time, in order to ensure the quality and effect of polyurethane spraying construction, the following points need to be noted:
1.Choose quality paints and spraying equipment.
2.Before construction, the surface of the object should be pre-treated, such as cleaning, rust removal, oil removal, etc.
3.Control the dilution ratio and mixing uniformity of the paint.
4.Master the operation skills such as the distance, angle and movement speed of the nozzle.
5.Pay attention to the influence of factors such as ambient temperature, humidity and ventilation at the construction site.
Through the above introduction and the mastery of precautions, polyurethane spraying construction can be better carried out to achieve the ideal coating effect.