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Causes and solutions for shrinkage holes of color-coated plates

Causes and solutions for shrinkage holes of color-coated plates

  • Categories:Industry News
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  • Time of issue:2020-06-03
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(Summary description)The shrinkage of the color coating plate refers to the phenomenon that small pits are formed on the surface of the color coating roller after the paint is baked.

Causes and solutions for shrinkage holes of color-coated plates

(Summary description)The shrinkage of the color coating plate refers to the phenomenon that small pits are formed on the surface of the color coating roller after the paint is baked.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2020-06-03
  • Views:0
Information

The shrinkage of the color coating plate refers to the phenomenon that small pits are formed on the surface of the color coating roller after the paint is baked. The reason for shrinkage is that the coating surface tension is too high will cause the coating to shrink. In the practical application of coatings, this problem is more common, mainly because the coating has poor wettability to the substrate. If the surface tension of the coating is too large, the wet film will form a uniform coating before drying. In severe cases, the substrate will be exposed, thereby forming shrinkage.

Generally speaking, shrinkage is more serious.

Causes and solutions of shrinkage of color coated board

solution:

One is to clean the surface of the color coated board as much as possible before painting to reduce the influence of oil, dust and other debris on the coating performance; the other is to use surface tension control agents or some solvents with good wetting effect to Reduce the surface tension of the coating to make its size close to the free performance of the substrate surface. The color coating roller is made of hot-dip galvanized sheet, hot-dip galvanized aluminum-zinc sheet, electro-galvanized sheet, etc. after surface pretreatment (chemical degreasing, chemical conversion treatment), the surface is coated with one or more layers of organic coating, and then baked The cured product. Also because there are different colors of organic coated color steel reel, hence the name, called color coated reel. In addition to the protection of the zinc layer, the organic coating on the zinc layer covers and protects the color-coated steel belt based on the hot-dip galvanized steel belt to prevent the steel belt from rusting, and the service life is about the same as that of the galvanized steel belt 1.5 times. The color coating roller has light weight, beautiful appearance, good anti-corrosion performance, and can be directly processed. The colors are generally divided into off-white, sea blue and brick red, and are mainly used in industries such as advertising, construction, home appliances, electrical appliances, furniture and transportation. Polyester: good adhesion, rich colors, wide molding range, good outdoor durability, medium chemical resistance, low cost.

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Time of issue:2020-06-02 00:00:00

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