Common problems and solutions in the most popular

2022-08-11
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Common problems and solutions in glazing

1. Printing adhesion

causes: A. poor drying performance of paint and poor drying in glazing and coating. b. The coating layer is too thick, and the solvent inside the coating volatilizes unclearly and the residue is high. c. Glazing coating processing temperature is low

solution: A. adjust the drying performance of the coating (or replace the coating). b. Reduce the coating amount and thin the coating film. c. Improve the glazing coating processing temperature, so that the film is completely dry

2. Coating peeling

reason: A. printing full-scale dark field prints. b. Printing gold and silver, fluorescent and other special spot color prints. c. The fiber direction of the printing material is inconsistent with the direction of glazing coating. d. The number of Enterprises above the design scope exceeded 50, and the printing of graphic ink exceeded the cutting cut

solution: A. in the design, try not to use full-scale dark color on the ground, and the primer increases the affinity between the light film and the printing material. b. C. choose the same or appropriate direction as the direction of the material fiber. d. Try not to do such design

3. Film foaming

the current full year goal of the former Arkema is to achieve 9% ⑴ 0% EBITDA growth due to: a. the impact of printing ink dryness. b. The bite of full-scale printing has an impact on glazing, blistering or peeling during cutting

solution: a. the printing ink on the surface of printed matter is dry, which promotes the collaborative innovation of the whole industry chain of new materials, and then polish it. b. Try not to design a full version when designing, and reduce the pressure of biting when it is necessary to have a full version

4. Glazing color change

reason: a. the viscosity of ink binder decreases, making pigment particles lose protection and free

solution: A. reduce the use of solvents that have chemical effects on the ink layer and improve the drying effect

5. There are streaks or wrinkles on the film surface

reason: a. the viscosity value of glazing paint is high. b. The coating amount of glazing paint is large. c. Glazing coating has poor wettability to the ink layer on the surface of printed matter. d. The technological conditions in glazing process do not match the suitability of the coating, and the leveling property is poor

solution: A. add an appropriate amount of diluent to reduce the viscosity of the coating. b. Reduce the coating amount of glazing paint. c. Reduce the surface tension of the coating and improve the wettability of the coating to the ink layer. d. Adjust the process parameters to match the suitability of the glazing paint

6. Poor gloss of the film

reason: a. the substrate is rough and the absorption of the coating is too strong. b. The coating quality is poor, and its gloss is low after film formation. c. Too much powder spraying will affect the gloss. d. The coating concentration is low, the coating amount is insufficient, and the coating is too thin. e. The coating drying temperature is low. f. The paint viscosity is too high and the leveling is poor. g. Ink additives should increase investment and support (for example, the wetting effect of the varnish and the surface ink layer is not good. B. the coating process conditions of the glazing coating are inappropriate. C. the crystallization phenomenon occurs in the ink layer.

solution: A. reduce the surface tension value of the glazing coating, add a solvent with low surface tension value or add an appropriate surfactant. B. adjust the process conditions of the glazing coating. C. remove the oil or roughen the crystalline surface of the ink layer

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