Factors Influencing Exposure Intensity of UVLED Cold Light S

Irradiation Intensity of UVLED Cold Light Source Curing Machine

 

 

 

As for the irradiation intensity of UVLED cold light source curing machine, customers often consult us on the Internet to inquire about the reasons why the irradiation intensity of UVLED cold light source curing machine is affected. What are the main factors affecting the irradiation intensity of UVLED cold light source curing machine? Look down and see!

 

 

 

Main Influencing Factors

 

 

 

I. Characteristics of Cured Materials

 

 

 

The working efficiency of UVLED cold light source curing machine depends on the difficulty of photons emitted by the lamp tube entering curable materials to initiate photoinitiators. UV curing depends on the collision of photons with molecules. Light can cause molecules to diffuse uniformly through the material. In addition to the characteristics of UVLED light source, the cured substrate also has optical and thermodynamic properties. They interact with radiation energy and have a significant impact on the curing process.

 

 

 

II. Spectral Absorption Rate

 

 

 

Light energy is the amount of wavelength absorbed by ink in the increasing thickness. The more energy is absorbed near the surface, the less energy is obtained deep. But this situation varies with the wavelength. The total spectral absorptivity includes all the effects of photoinitiators, monomolecular substances, oligomers and additives, including pigments.

 

 

 

Reflection and Scattering

 

 

 

Relatively to absorption, light energy is more changed by the direction of ink, resulting in reflection and scattering, which is generally caused by the matrix materials or pigments in curable materials. These factors reduce the UV energy to the deep layer, but improve the curing efficiency at the reaction site.

 

 

 

IV. Heat Dissipation System

 

 

 

Temperature has a significant influence on the rate of curing reaction (i.e. irradiation intensity); excessive temperature rise is one of the important limiting factors affecting the curing process. Usually, the heat dissipation of the UVLED light source itself is not good, then the light rate of the chip on the UVLED light source must be decreased.