subject: Some Cardboard Decoration And Deep Processing Technology Of - Packaging, Corrugated - Printing [print this page] Is corrugated cardboard boxes, cartons and other products of the main raw material, its performance to directly or indirectly affect the intrinsic product quality and the results.
On corrugated boxes, cartons and other packaging products, has a wear-resistant, waterproof and moisture resistant, and has high strength and good air tightness, is the basic characteristics of cardboard used quality requirements. However, the mills produced by the ordinary cardboard, often do not have good abrasion resistance, waterproofing and moisture resistant and so on. Board's strength and air tightness due to the quality and grade cardboard vary. Therefore, corrugated boxes and cartons to improve performance to consider, to be carried out through the surface of cardboard the necessary processing technology, can radically improve the quality of board performance and appearance.
A cardboard surface polishing process On packaging alone, finishing in a common process, the product through the glazing coating the surface, you can make prints enhanced water resistance, light fastness, abrasion resistance and pollution performance, but also to improve product surface brightness, so that the grade of greatly increased. Coating of paint with a variety of structures, useful coating of oil on the varnish printing, it also uses water-based polishing machine polishing, oil glazing, as well as solvent-based paint coating, UV coating paint. The characteristics of different paint coating, the product effect of surface processing technology has some differences. Same light-based paint, because material properties, different formulations, the effect of gloss, abrasion resistance, also vary. Were coated with a matt paint, the surface of printed materials have little gloss, but with certain artistic sense, some products, matt paint, craft paint effects as much as light. Whether or matte coating on the light require coating must have good abrasion resistance, can play a role in protecting the surface of India.
Oily coating process features. Oil-based varnish with a printing press, due to the thickness of the coating and dry coating machine by structural limitations, the printed product surface gloss and wear resistance, are not above the plane of light solvent or water based varnish effects. Therefore, this coating generally suitable for small volume, quality, do not ask the general product.
Solvent coating process features. Products by solvent coating, the surface gloss and abrasion resistance are all relatively high, but because of its thinner organic solvents.
Such as toluene, etc., with the volatile solvent, waste paint coating is also great. Glazing paint solvent and poor physical and chemical resistance, easy to yellow coating, and a strong smell of solvent is not only easy to pollute the environment, but also for production safety will be influenced to some extent, therefore, must pay attention to production operations on-site emissions, use of electric heating pipe machine drying, they should pay attention to maintaining the smooth transportation board, to prevent transmission skew the plug board drying tunnel which hit heating pipe, causing the occurrence of fire accidents. Characteristics of water-based coating process
. Water-based coating paint is colorless, odorless, non-toxic, non-stimulating, fast-drying coatings, wear resistance, high temperature, no yellow, no color, and has good transparency and high gloss and other advantages, so the process is more suitable Finishing on the surface of food packaging process. However, water based varnish solvent is water, the printed product after polishing prone to warping. The wear resistance second only to solvent coating paint, if there is use of PVC plastic outer cardboard packaging film, PVC plastic film is easy because the surface is sticky and the sticky coating bad film and graphic printing ink products. Therefore, the packaging material is a PVC plastic film, cardboard, water-based paint coating should not be used, but should wear the polish with solvent-based coatings for glazing.
UV glazing process features. On the use of UV alone, UV varnish coating on the surface of the printed product, so formed on the surface of high gloss film. After polishing film after UV irradiation, photo-polymerization reaction within the coating, light cross-linking reaction, and then rapidly solidify and dry and thus will not produce the quality of adhesion failure, the following process help to ensure quick operation. UV coating has a wear-resistant coating, chemical resistance and chemical resistance, good stability. UV Varnish because there is no solvent evaporation problems, so that, unlike solvent-based coating technology on the environment resulting from pollution, and its amount is relatively small, far below its production cost coating process. Therefore, it is the alternative to plastic coated and solvent-based coating of the ideal process. However, the production, should pay attention to the question is, UV coating on the skin will have a stimulating effect, UV light will also have some direct injury to the body, coated and dried produce UV radiation, ozone, production sites should have good ventilation exhaust.
2, paper packaging products to the requirements of paint coating
The use of product and process characteristics of terms, glazing coatings must meet the safety, health and environmental protection of the basic requirements, therefore, the varnish of soft elastic, leveling, abrasion resistance, acid and alkali resistance and adaptability better, and the varnish to a high performance transparent and does not change color, the surface film should have good toughness, to better protect the surface of printed materials, and enhance product packaging, waterproof, moisture, dirt and wear properties.
Calendar cardboard surface pressure alone in the polishing process based on a deep-processing technology. The production process is roughly: Prints first and pay-ray machine on a polished paint, varnish and other printed materials dried film, hot pressing machine with a calendar to form a coating film is more smooth and high brightness of the mirror effect, This is a common coating process can not achieve quality results, so the production process more for the pre-printed corrugated boxes, cartons and other packaging products for surface finishing process. The traditional calendar coating is toluene, cyclohexanone and other organic solvents as diluent. Not only easy to pollute the environment, endanger human health, and the product are likely to cause pollution to the product packaging be a security risk, therefore, not suitable for food, medicine packaging. Safety point of view from the packaging, should be non-toxic, tasteless, pollution-free environment-friendly water-based pressure varnish.
Board wax process over the surface of cardboard over the surface of wax treatment process, its relatively simple production technology and equipment, the operation is also very easy to master, the process is to use waxing machine to melt the wax heated liquid, evenly coating the cardboard or printed surface, when the wax coating on paper after cooling, the solidified form a thin, very smooth waxy coating, so that paper has a good waterproof, moisture, mold, anti-dirty, rust, oil and wear resistance, therefore, this technology is widely used for food packaging, paper packaging and other non-moisture products, surface processing.
