First, the impact of UVLED energy

Deep curing of ultraviolet radiation, the main condition is that the molecule must absorb the light quantum with enough energy to become an exciting molecule, decompose into free radicals or ions, so that the unsaturated organic matter polymerization, grafting, crosslinking and other chemical reactions to achieve the purpose of curing. The UVLED energy of the photoinitiator in the UV coating supplied exceeds or falls short of its required energy

1, do not know the UVLED cold light source energy required by the photoinitiator, such as blind excess supply, this practice not only wastes energy, but also causes the negative effect of excessive curing, such as detonation, anti-curing reaction.

2, when the UVLED energy is insufficient, the UVLED energy must be moderate, that is, it can not be excessive or insufficient, so as not to cause complete curing.

Second, the influence of UV coating thickness

The thickness of UV coating plays a key role in the effect of UV curing, the coating is too thick, the drying time is relatively long under the irradiation of the same power light source, on the one hand, the drying of UV coating will be affected, on the other hand, the surface temperature of the substrate will be too high, resulting in the deformation of the substrate; Too thin coating will lead to poor surface gloss. In addition, the color, temperature, curing speed, substrate surface and other conditions of the thickness of the UV coating need to be appropriately adjusted.

Third, the effect of curing distance

According to the curing substrate, the UV lamp is generally about 10-15mm away. The curing distance must be properly adjusted with the substrate, coating, and irradiation power of UVLED lamps.

Fourth, the effect of UV light curing speed

According to the different substrate, coating, curing distance, adjust the curing speed of the equipment, curing speed is too fast, the UV coating on the surface of the substrate is sticky or the surface is dry and the inside is not dry; The running speed is slow, and the substrate surface will age.

Five, the impact of the working environment

When the viscosity of UV coating changes greatly due to temperature, the room temperature should be adjusted, generally 15-25℃ is more appropriate, and pay attention to the curing can not be subjected to direct sunlight.