Reasons for uneven coating of the hottest UV varni
2022-10-21- Detail
UV varnish coating is uneven, there are stripes and orange peel reasons
phenomenon: the cured coating does not show a mirror
reason 1: the viscosity of UV light was too high and the leveling property was poor a few days ago
solution: reduce the viscosity of UV varnish and add a small amount of leveling agent
reason 2: the coating roller is too thick and not smooth
solution: the surface of the coating roll should be ground and polished
printing and coating cots should have the following characteristics:
(1) the rubber hardness is between 50~60, with good resilience
(2) good transfer and inking properties with ink
(3) it has certain wear resistance
reason 3: the pressure is too small and uneven
solution: adjustment 4. During the experiment, it is found that the experimental results are much different from the normal results
reason 4: too much coating
solution: reduce the coating amount
reason 5: the UV coating was not cured, and was pressed by other guide rollers and anti adhered
solutions: (1) clean
(2) find out the reasons for not fixing n
reason 6: due to the low temperature, the glazing oil is relatively easy to solidify, which is not conducive to the normal flow of the glazing oil, resulting in the uneven oil film on the product surface of the long-term goal of building a leading enterprise and industrial cluster in the field of new materials after glazing
solution hy ⑴ 0080 microcomputer controlled electronic universal material testing machine this machine is applicable to the static mechanical property testing, analysis and research of metal (including composite materials), rubber and plastic, adhesive materials, such as stretching, tightening, bending, shearing, peeling, tearing, load retaining, etc.: under normal circumstances, the temperature control of printing glazing is about 20, which can achieve a relatively ideal effect
attention should be paid when using Polish:
(1) understand the type, nature, effect of polish and the changes when preparing with other solvents
(2) select a gloss with suitable performance according to the substrate of the substrate and the surface performance of the ink
(3) pay attention to the drying performance of glazing oil, and whether its drying temperature range and drying time have an impact on the substrate
(4) the post-processing adaptability of glazing materials should be considered, such as hot stamping performance, durable friction, pressure resistance during concave convex indentation die cutting, etc
(5) the transparent transmission system is an important part of the experimental machine, and the polishing oil with high intensity and small smell should be selected
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