Case

Curing principle
UV ink contains a photoinitiator. When ultraviolet rays of a specific wavelength emitted by an LED UV lamp irradiate the ink, the photoinitiator absorbs ultraviolet energy and transitions from the ground state to the excited state.The excited photoinitiator is unstable and will undergo a cleavage reaction to generate free radicals or cations.These free radicals or cations will initiate the prepolymer and monomer molecules in the ink to undergo a polymerization reaction, rapidly transforming the molecules in the ink from a low molecular weight monomer or prepolymer state to a high molecular weight polymer state, thereby achieving the curing and drying of the ink.

Application
Fast curing speed: The LED UV lamp can cure UV ink in a short time, generally only taking a few seconds or even shorter. Compared with traditional thermal curing methods, it greatly improves the printing production efficiency of mobile phone cases and can meet the needs of large-scale industrial production.

Good curing effect: The ultraviolet wavelength emitted by LED UV lamps is relatively concentrated, which can more effectively stimulate the photoinitiator in UV inks, making the ink curing more complete. The formed ink film has good abrasion resistance, scratch resistance, and chemical corrosion resistance, and can well protect the patterns on the mobile phone case and extend the service life of the mobile phone case.

Energy saving and environmental protection: Compared with traditional mercury lamp UV curing equipment, LED UV lamps have higher energy utilization efficiency, and energy consumption can be reduced by 30% – 70%. Moreover, LED UV lamps do not contain harmful substances such as mercury and do not generate ozone, reducing environmental pollution and harm to the health of operators, which is in line with the green and environmental protection development trend of the modern screen printing industry.

Precise control: LED UV lamps can precisely adjust the light intensity and irradiation time through an intelligent control system. According to different thicknesses, different colors of UV inks, and the specific shape and printing requirements of silicone mobile phone cases, the curing parameters can be flexibly adjusted to ensure the best curing effect.