Curing, adhesion, scratch resistance and other UV inks that need the most attention and solutions

As a more environmentally friendly ink, ink has the characteristics of fast curing speed, no volatile organic solvent, strong film-forming hardness, and good solvent resistance.
and other fields have achieved certain development
.
In regions such as the Yangtze River Delta and the Pearl River Delta, the development of UV printing technology has entered the fast lane
.

UV mainly needs to pay attention to the following 3 aspects: the curing performance of UV ink, the adhesion performance to the substrate, and the scratch resistance coating online coatingol.

Solution: It is recommended to corona, pickling or flame treatment on the surface of substrates such as plastic sheets before UV printing to increase the surface activity of the substrate and the affinity for UV ink; for gold and silver cardboard printing The material is recommended to be primed (generally, the surface tension of the substrate is required to reach 40×10-3N/m or more)

(1) Viscosity reducer: The function is to reduce the viscosity of UV ink, and the initiator contained in it does not affect the curing speed of UV ink; the recommended addition ratio is 3% - 15%

(2) Strengthening agent: The function is to increase the smoothness of the UV ink surface and improve the scratch resistance of the printed product, but it will affect the post-processing technology such as hot stamping, lamination, lamination, and color stacking of the printed product