PU paints and polyurethane coatings are capable of hydrogen bonding between polymer molecules. When an external force acts on the coating film, the hydrogen bond can be separated to absorb the external energy, and when the external force is removed, the paint film re-forms the hydrogen bond to form a reversible repetition, which is a PU fabric having high mechanical wear resistance and toughness.
1. The effect of UV paint quality on wood quality
UV paint is a kind of radiation-curable paint. It is an environmentally-friendly energy-saving paint. The wood floor paint film coated with UV paint is hard and wear-resistant. The high-gloss paint is bright and plump, and the matt paint is fine and smooth.
The UV lacquer cures quickly and is dried by ultraviolet light in a few tenths of a second. When the coating film is dried by the wet film, the shrinkage ratio is large, and the internal stress pair is also large, so that the adhesion between the coatings is poor. The hardness of UV lacquer is generally stronger than other lacquers. Generally, the harder the coating, the more brittle, the less resistant it is, and the coating is also prone to cracking. When the hardness of the coating film is noisy, the change of the surface paint film may not be deformed with a slight deformation of the floor due to the thermal expansion and contraction of the floor or the change of the wet and dry shrinkage, thereby causing cracks.
Therefore, the quality of the paint should be strictly controlled during the painting to ensure the overall quality of the wood.
2. The effect of PU paint quality on wood quality
PU paints and polyurethane coatings are capable of hydrogen bonding between polymer molecules. When an external force acts on the coating film, the hydrogen bond can be separated to absorb the external energy, and when the external force is removed, the paint film re-forms the hydrogen bond to form a reversible repetition, which is a PU fabric having high mechanical wear resistance and toughness.
The paint film of PU paint has good adhesion and excellent adhesion to each surface, especially the oil sealing effect. It can be dried at high temperature and can be cured at low temperature. It can be cured normally even at 0 °C, and has good resistance to chemicals and chemicals. Every paint needs to be dried before the next painting process, which takes a long time and low efficiency, but it has a good sealing effect on oily floors, especially good toughness. Therefore, the paint film which is deformed by the smile of the floor causes cracking of the paint film, wrinkles, etc., and the paint film is less damaged than the UV paint.
However, since PU paint has certain volatile gases such as benzene and contains a large amount of isocyanate groups with high activity, it is easy to gel when exposed to water or moisture, and the construction operation may cause peeling of the layers, foaming of the coating film, etc. . At the same time, the PU coating containing aromatic isocyanic acid is easy to turn yellow after the ultraviolet irradiation, and the gloss and color retention are poor. Therefore, it is necessary to strictly guarantee the quality of the PU paint and master the correct operation method so as to ensure the quality of the wood.
The article is edited by http://sh.gojiaju.com/Shanghai Building Materials.
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Foshan Kingrate Optoelectronic Technology Co., Ltd. , https://www.kingrateuv.com