The requirements for glazing coatings for paper packaging products are based on the use and processing characteristics of the products. Gloss coatings must meet the basic requirements for safety, hygiene and environmental protection. Therefore, the flexibility, leveling, and abrasion resistance of glazing oils must be met. Acid and alkali resistance and adaptability are better, and the coating oil must have high transparency and non-discoloring properties, and its surface film layer should have good toughness so as to better protect the surface of the printed product and enhance the product packaging. Waterproof, moisture-proof, anti-dirty and wear-resistant properties. Cardboard surface calendering process The calendering is a deep processing process based on glazing. The general process of production is: the printing product first polishes the coating with a polishing machine, and after the drying layer of the printing oil film is dried, the calender is used for hot pressing. The glazing film layer has a smoother and brighter mirror effect. This is a quality effect that can not be achieved by the general glazing process. Therefore, this production process is more used for the surface of preprinted corrugated cartons, cartons and other packaging products. Finishing processing. Traditional pressure-coating paints use toluene, cyclohexanone and other organic solvents as diluents, which not only make it easy to pollute the environment and endanger human health, but also cause pollution to the products and leave potential safety hazards for the packaging of the products. Therefore, it is not suitable. Food, medicine packaging. From the perspective of packaging safety, non-toxic, odorless, non-polluting environment-friendly water-based calendering oils should be used. Cardboard surface waxing process The process of processing the wax on the surface of the board is relatively simple in terms of production process and equipment, and the operation is very easy to grasp. The waxing machine is used to heat the paraffin liquid heated and melted evenly on the surface of the paperboard or printed material. After the paraffin coating is cooled, it is solidified to form a thin layer of very smooth waxy film, so that the paper surface has better waterproof, moisture, mold, dirt, rust, oil and abrasion resistance Therefore, this process is commonly used for surface preparation of food packaging, paper packaging, and other non-moisture resistant products. Spraying process on paperboard surface The laminating machine is used to spray a layer of polyethylene or polypropylene with a thickness of 0.01-0.07mm on the surface of the paperboard to improve the airtightness and tensile strength of the paperboard, and also to make the paperboard moisture-proof and waterproof. Anti-oil and anti-dirty properties have been greatly improved. In recent years, with the continuous prosperity of the market economy, liquid beverages, solid frozen foods and other products will have more and more demand for laminating paperboard, and the laminating technology will become more and more mature. According to the characteristics of the product, the processing of the coating of the paperboard has single-sided and double-sided. Double-sided laminating paperboard, printing quality control is very important, if the process is not properly controlled, prone to imprinting bottom quality problems, that is, the ink is printed on the absorptive PE film, easy to stick dirty print back. Therefore, the use of non-drying device printing lithographic printing machine double-sided laminating paperboard, should use wear-resistant, strong adhesion, non-absorbent ink printing, in order to ensure product quality. Cardboard surface coating process Laminating is a commonly used finishing process for pre-printed carton face paper, cartons, handbags, and covers. After being coated, the printed product can achieve waterproof, anti-fouling, anti-discoloration, heat-resistance, light resistance, and friction resistance. At the same time, it can enhance the glossiness, aesthetics, puncture strength, and tensile strength of the product and improve the use of the product. Life and packaging quality. The general process of laminating is: After the product is printed, the laminating machine is used to composite the plastic film with the surface of the printed material into an integral structure to form a printed matter of paper and plastic. The coating process is divided into a coating film and a pre-coating film; there are also thermal and cold coating processes. Film-coated adhesives are also available in different types, both water-based and solvent-coated. Solvent coating film has high brightness, but there is a problem of environmental pollution, and the solvent of the water-based film adhesive is water, and there is almost no pollution to the product and the environment. Therefore, it is widely used for the surface finishing of food packaging. Because the coated products need to be classified for processing during recycling, the regeneration process is relatively complicated and the production cost is high. Some packaging products are being replaced by calendering or UV coating processes. In summary, the paperboard surface treatment is an important technical means to increase the added value and quality of goods, improve the packaging quality and packaging quality of products, effectively prevent the damage of packaging and commodities, and enhance the market competitiveness of commodities. Therefore, a correct understanding of the paperboard surface technology processing production methods and methods, according to the characteristics of the goods to choose the right packaging process, to improve the promotion of goods and improve the economic efficiency of enterprises, no doubt has a good role in promoting.
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