Vacuum coating machine is vacuum plating UV coating

Vacuum coating machine is vacuum plating UV coating

Vacuum coating factory degree of UV curing coating on the coating performance in the process of the influence of UV curing coatings double bond conversion rate could not have reached 100%, through the analysis of the infrared spectrum before and after coating curing can be seen that the change of content of double bond. Carbon-carbon double bond of the stretching vibration absorption peak at 1635 cm - 1, 809.2 cm - 1 is very obvious. In the spectra after curing, the two carbon carbon double bond absorption peak greatly abate, but won't go away, we will film exposure mj/cm2 increased from 350 to 2100 mj/cm2, the absorption peak is still there. Therefore, we must know the coating curing to what extent will affect the performance of coating.
With the constant improvement of UV curing coating, the coating hardness will be better and better, with the increase of UV irradiation dose coating rocker hardness change situation, the formula used to described earlier formula 2 and formula 5 and formula 6. As you can see: with the crosslinking of UV curing coating, the coating hardness under the condition of certain curing one obvious turning point, after that increase the radiation energy, the coating hardness were not significantly improved. In the coating before and after the inflection point of DSC curves. Figure 3. A formula is 5 under UV irradiation after the quantity to 230 mj/cm2 coating DSC test results, B is the result of the irradiated volume to 260 mj/cm2. Figure 3 shows that under the condition of UV curing coatings is not completely, the coating at high temperature can release low molecular substances, it will lead to changes in coating. Experimental results are also verified this, such as A primer curing condition, vacuum coating, up to 110 ℃ or so, the coating appearance of hair color.