UV ink is a standard consumable for UV printers. The curing effect of uv ink during the printing process directly affects the print quality of the printed matter. UV ink refers to the use of ultraviolet light with different wavelengths and energies to polymerize the monomers in the ink binder into polymers under ultraviolet irradiation to form the ink film and dry the ink.
During the printing process, uv printers often encounter the phenomenon that UV ink is not completely cured and the surface is sticky, which results in unsatisfactory printing effects. How does this phenomenon occur? How can this phenomenon be solved to ensure print quality?
UV light source power is not enough
There are three elements in uv printer uv light curing:
1. Spectrum, that is, whether the light emitted by the UV lamp and other light sources is consistent with the absorption spectrum of the cured product.
2. Intensity, that is, whether the light emitted by the light source is sufficient to cause the photochemical reaction of the cured product, due to the performance of the internal sensitizer of different cured products (UV coating ink, glue), the dosage is different, and the light transmission of the main agent and the amount , Sensation is also different, so the curing strength requirements are different.
3. Curing speed, curing speed is too fast to complete curing, and too slow will adversely affect the cured product. Such as pattern cracking, poor adhesion, etc. The curing speed varies with different cured products.
The fast printing speed of the Uv printer is also the cause of the incomplete curing of the UV ink and the sticky surface. At this time, the printing speed can be reduced or the power of the light source can be increased.
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