What factors affect the irradiation intensity of the UV LED curing machine?

Regarding the irradiation intensity of UV LED curing machines, the main influencing factors are:

1. Performance of curing materials

The working efficiency of the UVLED cold light source curing machine depends on the difficulty of photons emitted by the lamp head entering the curable material to initiate the photoinitiated molecules. Ultraviolet curing relies on collisions between photons and molecules. Light allows molecules to travel uniformly through the substance. In addition to the properties of UVLED light sources, cured substrates also possess optical and thermodynamic properties that interact with radiative energy, significantly affecting the curing process.

2. Spectral absorption

Light energy is the wavelength of the ink absorbed as the thickness gradually increases. The more energy absorbed near the surface, the less energy is generated in the deep layers. But this depends on the wavelength. The total spectral absorption coefficient includes all effects of photoinitiators, monomers, oligomers, and additives (including pigments).

3. Reflection and scattering

Compared to absorption, light energy is more caused by the ink changing direction, usually due to reflection and scattering caused by the matrix material or pigment in the curing material. These factors reduce ultraviolet energy reaching deep layers but improve curing efficiency at the reaction site.

4. Cooling system

Temperature has a significant impact on the curing reaction rate (i.e., the intensity of the irradiated light), and excessive temperature rise is one of the important limiting factors in the curing process. Usually, if the UV LED light source itself does not dissipate heat well, the light rate of the chip on the UV LED light source will definitely decrease.