The hottest paperboard surface treatment process I

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Paperboard surface treatment process (I)

paperboard is the main raw material for the production of corrugated boxes, cartons and other products. Its performance directly or indirectly affects the internal quality and use performance of products. The design of the fixture of corrugated box, paper 1 and universal tensile testing machine is mainly based on the experimental standard of materials and the shape and material of samples (especially finished products and semi-finished products); Boxes and other packaging products, with wear-resistant, waterproof and moisture-proof properties, and with high strength and good air tightness, are the basic quality requirements for the use characteristics of paperboard. However, ordinary paperboard produced by paper mills often does not have good wear resistance, water resistance and moisture resistance. The strength and air tightness of paperboard vary with the quality grade of paperboard. Therefore, in order to improve the performance of corrugated boxes and cartons, we must carry out some necessary technological processing on the surface of the paperboard in order to fundamentally improve the performance and appearance quality of the paperboard

polishing process of paperboard surface

polishing is a common process for post press processing of packaging products. After the surface of the product is polished and coated, it can enhance the performance of water resistance, sun resistance, friction resistance and pollution resistance of the printed product, and at the same time, it can also improve the surface brightness of the product, so as to greatly improve the grade of the product. There are many structures of glazing paint, including oily glazing oil for printing machine, water-based and oil-based glazing oil for glazing machine, solvent based glazing paint and UV glazing paint. The characteristics of glazing coatings are different, and the process effect of product surface processing is also different. Similarly, the gloss effect and wear resistance of bright coatings are also different due to different material properties and formulas. Coated with matte paint, the surface of the print has almost no gloss, but it has a certain sense of art. Some products are coated with matte paint, and the process effect is no less than that of bright paint. Whether it is bright or matte coating, the coating must have good wear resistance in order to protect the surface of prints

oily polishing process

use the oily polishing oil on the printing machine. Because the thickness and drying of the polishing coating are limited by the machine structure, the gloss and wear resistance of the printing surface are not as good as the solvent or water-based polishing oil on the polishing machine. Therefore, this kind of glazing is generally only suitable for ordinary products with small batch and low quality requirements

solvent glazing process

products with solvent glazing have relatively high surface gloss and wear resistance. However, because its diluent is an organic solvent, such as toluene, with the volatilization of the solvent that we need to know in detail, the cost of glazing paint is also large. Solvent glazing coating has poor physical and chemical resistance, the coating is easy to yellowing, and the solvent with strong odor is not only easy to pollute the environment, but also has a certain impact on production safety. Therefore, the production and operation site must pay attention to the emission of exhaust gas. If the machine adopts electric heating pipe for drying, it is necessary to pay attention to maintaining the smooth transportation of paperboard, so as to prevent the skew transportation of paperboard from blocking the drying channel and touching the electric heating pipe, Servo mold plug system and 3-axis manipulator cause fire safety accidents

Waterborne Glazing process

Waterborne Glazing paint has the advantages of colorless, tasteless, non-toxic, non irritating, fast coating drying speed, wear resistance, high temperature resistance, no yellowing, no discoloration, and high transparency and gloss, so this process is more suitable for the surface finishing processing of food packaging. However, the solvent of water-based glazing oil is water, which is easy to produce deformation after printing. Its wear resistance is second only to solvent glazing paint. If the outer layer of paperboard is packed with PVC plastic film, it is easy to damage the glazing film and graphic ink color of prints due to the sticky surface of PVC plastic film. Therefore, the outer packaging material is PVC plastic film, and the water-based paint should not be used for paperboard glazing, but solvent based wear-resistant glazing paint should be used for glazing, which is the experience of our company from a quality accident

uv glazing process

uv glazing is to use UV glazing oil to coat the surface of printing products, so that the surface forms a high gloss film. After UV irradiation, photopolymerization reaction and photocrosslinking reaction will take place inside the coating, and then it will be cured and dried quickly, so there will be no adhesion quality failure, which is conducive to ensuring the rapid operation of the next process. UV glazing coating has the advantages of wear resistance, drug resistance, chemical resistance and good stability. Because UV glazing oil does not have the problem of solvent volatilization, it is not like the pollution of solvent based glazing process to the environment, and its dosage is relatively small, and its production cost is far lower than that of film coating process. Therefore, it is an ideal process to replace plastic coating and solvent based glazing. However, during production, it should be noted that UV coating will stimulate human skin to a certain extent, and direct UV light will also cause certain damage to human body. After UV irradiation and drying, the coating will produce ozone. The production site should have good ventilation and exhaust

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