Because the raw materials used in each product are different, the baking temperature also changes accordingly. In the entire printing process, the baking temperature is the key to affecting the quality of the goods.
If the temperature is too high, the molecular bond will crack, and the coating will be brittle. Shanghai will not stick the adhesive, and the coating will not withstand mechanical processing and high-temperature cooking and burst paint. Therefore, the error value of the baking temperature should be controlled within ± 3 ℃, Shanghai stickers, the circulating air volume should also be controlled at 21600m3 / h, in addition, the speed of the machine should also be regularly checked Printing to ensure that each coating has a suitable baking moment.
If the temperature is too low, the chemical molecular bonds in the resin are not fully cross-linked and cured to form a film. Not only does it have no adhesion, but also forms a smudge on the reverse side. The most difficult part of splitting is that the reverse side of the printed sheet is the inner wall of the container. If it is a food can, it will directly contaminate the contents it contains.
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Editor in charge: Liu Yang
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