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Why does PU paint emphasize the use of lacquer, hardener and thinner?Different PU lacquers have different dilution systems, and solid content is also different. If not matched diluents or curing agents are used, the crosslinking reaction of the paint will be affected, resulting in insufficient hardn ...

Why does PU paint emphasize the use of lacquer, hardener and thinner?


Different PU lacquers have different dilution systems, and solid content is also different. If not matched diluents or curing agents are used, the crosslinking reaction of the paint will be affected, resulting in insufficient hardness, non-drying, film cracking and other defects.


What is the reason for the crack lacquer?


1. After the crack varnish or nitrocellulose varnish is painted, the paint film is not smooth enough.


2, crack paint or nitrocellulose varnish drying time is too long.


3. When spraying the crackle paint, the air pressure is too large, the oil volume is too small or the spray gun is too far away from the object surface.


4. Negligence in construction and not fully stirred after painting.


What are the requirements and environmental conditions for components suitable for cracking paint?


1, the plane, curved surface and other complex shaped special-shaped parts can be sprayed with crack paint.


2, the moisture content of the billet must conform to the local equilibrium moisture content.


3, flat or curved surface continuous spraying area can not exceed 2 square meters, otherwise it should be sub block construction.


4, the construction site should be well ventilated, light enough to facilitate observation.


5, the construction site should be convenient for the builders to walk freely, not too many obstacles, high altitude construction should take a good scaffolding to facilitate the construction of the staff. According to Xinmin network