The effect of UV energy

The main condition for the deepening of ultraviolet radiation is that the molecules must absorb light quantum, become excited molecules with sufficient energy, decompose into free radicals or ions, and make unsaturated organic substances polymerize, graft, cross-link and other chemical reactions to achieve curing. The purpose of the UV coating photo-initiator is that the ultraviolet rays can provide more than or lack of the required energy, called "photo-initiator", to ensure complete curing, the scientific and reasonable supply of energy than the required energy is normal. I didn't know that the photoinitiator needed UV light, blindly oversupplied, this method is not only a waste of energy, but also leads to excessive curing negative effects such as popping, anti-curing reaction. The lack of ultraviolet light energy, the energy of ultraviolet light must be moderate, that is, not too much and can not be used, has been prevented from curing completely.

Secondly, the influence of UV coating thickness

Ultraviolet UV glue curing lamp plays an important role in the influence of coating thickness. If the coating is too thick, the irradiation time of the same power light source is relatively long. On the one hand, it will affect the drying of the UV coating, and on the other hand, the surface temperature of the substrate will be too high. , resulting in deformation of the substrate, and the coating is too thin, which will lead to poor surface gloss of the product. Another UV coating thickness such as paint hue, temperature, cure speed, etc., needs to be properly deployed under different conditions.

Third, the effect of treatment distance

The distance between the UV curing light source and the target object affects the curing effect. According to different curing substrates, the general distance is about 10-15 cm. If the distance is too low, it may cause thermal deformation of the substrate; if the distance is too high, the UV energy will be small, and the surface of the substrate will be dry and sticky. The curing distance must be related to the base plate, paint, light source power and other appropriate adjustments.

Fourth, the effect of curing speed

According to the substrate, coating, curing distance, etc., properly adjust the curing speed of the equipment. If the curing speed is too fast, the UV coating on the surface of the bottom plate will stick or the dry surface will dry; if the operation is slow, the surface of the bottom plate will age.

Fifth, the impact of the working environment

Because the viscosity of UV glue curing lamp coating changes with temperature, the indoor temperature should be adjusted, generally 15-25 ℃ is more suitable, and pay attention to the printing can not be exposed to sunlight.