The fastest growing packaging screen printing tech

Rapid development of packaging silk screen printing technology

today's Asian packaging market is developing rapidly, especially China's packaging industry. With the continuous emergence and application of new materials and new technologies, printing has shown unique advantages in today's packaging and printing, and is playing a huge role, providing an unprecedented broad stage for packaging products with a wide variety of commodity markets, unique shapes and special effects

I. application of silk printing in packaging

the high flexibility of printing can print on the surface of various packaging products to achieve a variety of special effects. Therefore, silk printing technology is very popular in the packaging industry, mainly applied in the following aspects:

application in plastic packaging. The printing plastic film can be used for the packaging of food, clothing and other products, as well as the printing of plastic packaging containers

application in paper packaging. Due to the thick ink layer and strong three-dimensional sense of printed patterns, it can greatly improve the grade of packaging, and is increasingly used in carton packaging of cigarettes, wine, cosmetics, nutrition products and high-end footwear

application in metal packaging. Metal packaging mainly includes various beverage cans, food cans, sundry cans, etc. the printing ink used requires strong adhesion, high hardness, good tensile and friction resistance

application in glass packaging. Glass packaging is mainly a variety of glass bottles, which are mostly used for the packaging of various liquids, such as beverages, mineral water, and various beers, Baijiu, wine, etc

in ceramic packaging. The direct method of ceramic printing is to use silk plate to directly print the image onto the ceramic embryo, and then apply glaze to make porcelain. The indirect method is to transfer the silk printed decal paper to the ceramic vessels. Due to the fine printing of the decal paper, it is widely used in the ceramic packaging, such as the advanced packaging of some wines

II. Roller silk has become the first choice for high-grade packaging printing.

with the development of packaging printing towards high quality, high efficiency and diversification, roller silk printing has become a packaging printing technology with high economic and technical content. Its printing products have the characteristics of thick ink layer, bright and heavy color, good coverage, fine lines, seamless pattern connection, large particle printing ink can be used to increase the stereoscopic sense of graphics and text, and high definition of printing images, It has been widely used in many high-end carton packaging fields and label printing fields

the roller printing system is composed of several independent monochrome printing units, which is suitable for printing of various widths and enables the synchronous production line to be under integrated intelligent control. The key technology of cylinder silk printing is plate cylinder and printing system. The printing system squeezes the ink with a rubber scraper to make it penetrate into the substrate through the hole on the cylinder nickel. The substrate is fixed by an embossing cylinder, and the silk, substrate and embossing cylinder move at the same speed, forming a "friction free" system. The roller printing machine has stable and durable structure, the silk can be used repeatedly, the overprint is accurate, and the speed is fast. It has a simple and convenient moving parts conversion control system. The downtime for replacement work is very short, and the equipment can achieve a high output. It is suitable for printing products with large quantities or frequently repeated printing. It is the preferred model for packaging printing, and it is also a model widely used in the domestic packaging printing industry at present

III. The Renewal of silk materials has improved the quality and efficiency of packaging production.

silk is the skeleton of the production plate, the basic support for the photosensitive adhesive or film, and the most expensive field for silk printing enterprises, mainly including the price of silk and the costs of silk installation and recovery. New silk materials are the primary guarantee for creating high-quality printing products, saving costs and improving efficiency

disposable filament system. The disposable silk system can reduce the labor intensity of workers and ensure the rapid replacement of silk printing operations. The wire can be pre stretched with high repeatability and stability equipment to ensure that each wire can obtain a consistent wire tension

pre coated wire. The silk precoated with photosensitive adhesive can directly expose and develop the silk, which not only greatly reduces the steps of coating and drying the silk before exposure, but also the precoated silk coating can accurately control the thickness of photosensitive adhesive and the thickness of ink layer, so as to obtain better printing quality stability

non woven silk material. This new type of silk includes two kinds of materials: perforated and corrosive. The non-woven silk suits the trouble of coating photosensitive tape at the junction of longitude and latitude of traditional silk. At present, the non-woven silk material is made of 100% nickel by electroforming. The unique hexagonal structure can achieve excellent stability and ideal inking performance. It can make the silk stretch freely in the printing of different widths. It is suitable for high-speed printing. It has the advantages of high calibration accuracy and high printing resistance

IV. new printing inks provide new effects for high-end packaging boxes

with the introduction of various functional inks, especially the continuous development of UV ink production technology, new printing processes are favored in the field of packaging and decoration by virtue of their unique advantages. At present, the most widely used printing processes include imitation metal etching, ice flower texture, refraction and so on. The printed cigarette, wine and gift packaging boxes are colorful, elegant and luxurious, which can be rated as top-grade products. They are deeply loved by consumers and have a good market

imitation metal etching process. Otherwise, the damage to the equipment will be caused by printing imitation metal etching ink on the printing materials with metallic luster, such as gold and silver card paper, to obtain a unique visual effect similar to that of smooth metal treated by corrosion, carving or sanding

ice print process. It is to print ice flower ink on gold and silver card paper. After UV curing, the printing surface will show a crystal clear and dense "ice flower" pattern, which glitters under the light, just like the ice flowers on the glass window in winter

refraction printing process. In recent years, the rise of refractive printing technology is a new star in the packaging printing family. Printing can easily ensure that the time for doing experiments is infinitely close to the precise value. It can print ultra-fine concave convex lines on the mirror gold and silver card paper. After the light irradiation, it will produce a colorful refraction effect, making the packaging box that has won the international authoritative certification more noble and gorgeous

luminous printing. The ink used is a light storing ink containing luminous materials, which is suitable for the packaging and printing of high-grade commodities such as high-grade cigarettes, wine, drugs, cosmetics, etc

crystal glue printing. Crystal glue is used to screen print three-dimensional crystal glue drops on gold and silver card paper. Now the new UV curing crystal glue on the market has faster film formation, better wear resistance and brightness

Crystal Gloss printing. The transparent ink layer on the surface of the produced printed matter contains crystalline flashing substances, which can produce a colorful and glittering special device when the incident angle of sunlight or light changes. On the other hand, it completely solves the pollution decoration effect

mirror ink printing. It is a metal color printing ink, which is made of plastic resin mixed with special metal color powder. If it is printed on the back of the transparent plastic sheet, the mirror printing effect of metal color can be obtained, just like the hot stamping effect

v. the process of digitalization of plate making before silk screen printing is accelerating.

modern printing technology has entered the digital era. The continuous maturity of digital printing technology has led to great changes in plate making technology. At present, computer printout plate making film, phototypesetting output film and inkjet output film are being widely promoted. With the increasing economic strength of the silk printing industry, it is believed that CTP will become the mainstream of silk printing plate making technology. The computer direct plate making system breaks the traditional plate making mode, completely discards the film base plate, uses the computer digital processing technology to design the printing graphics and text symbols required, and stores them in the computer after professional processing such as color separation and dot according to the requirements of the screen printing plate, and then drives the special inkjet equipment through digital conversion output to spray the image onto the silk plate coated with photosensitive emulsion. After direct exposure A printing plate for silk printing can be obtained by developing (developing). Another direct imaging method for plate making is to directly use computer scanning laser imaging on a special metal alloy film. This method can eliminate the silk and photosensitive glue, does not need complex stretching process, and the produced template has no deformation, alignment and high printing precision, which is the future development direction

VI. combination printing makes the packaging printing process colorful

due to the strong visual impact of packaging, especially some high-end packaging products pursue various unique artistic effects in order to be unique in the market. Therefore, combination printing has become one of the popular trends in the packaging field. As we all know, offset printing, gravure printing and flexo printing have the main advantages of fine graphics and texts, rich level reproduction and good point reduction, which are suitable for printing of eye and fine images. Printing is good at thick ink layer, bright color, high saturation, strong three-dimensional sense of printed products, and can achieve a variety of anti-counterfeiting functions and special effects. The appearance of the combination of silk printing and other printing methods determines that silk printing occupies a position that can not be ignored in the field of packaging printing, and gradually becomes one of the main printing processes in the field of packaging printing, greatly improving the quality and grade of products and promoting the sales of products. In the actual production, more and more companies begin to adopt a variety of printing process combinations to achieve the desired special effects, such as offset printing, flexo printing and other combination printing methods. In particular, the rotary transfer unit with high printing accuracy and the application of flexographic printing machine make the printed matter even better. This method can obtain the metal effects of gold, silver and the like, as well as the embossing and sanding effects on the substrate

VII. Future improvement and development of printing in the field of packaging printing

the printing speed is slow. Although the printing speed of printing equipment has been greatly improved, it is still relatively slow compared with other printing processes. If the production volume is too large, it may restrict production and affect the delivery date

ink drying time is long. The printing ink layer is thick, which makes drying very difficult and takes a long time; Post press products cannot be stacked immediately, requiring numerous drying racks and large workplaces

accuracy and stability need to be further improved. From the perspective of production control and quality, the accuracy and quality stability of printing are inferior to offset printing and gravure printing. In particular, there are still some problems with the accuracy of domestic printing machines, which are easy to cause inconsistency in product quality in production. It is difficult to ensure the consistency of hue, specification, etc. not only among batch products, but also among the same batch of products

high cost. At present, the cost of printing is relatively high, which mainly includes two factors: first, the ink layer is thick, and the ink is relatively large, which will certainly increase the cost; Second, the production efficiency of printing is relatively low. Printing takes more time due to the same process effect, which will virtually increase the production cost

multi color overprint is difficult. The current printing equipment is basically monochrome printing. If you want to achieve multiple effects on the same product or carry out multi-color overprinting, there will often be inaccurate overprinting, resulting in a large number of waste products, which will not only waste time and resources, but also affect the delivery date and even place orders

the market needs multi-color full-automatic printers. In order to improve production efficiency and overprint accuracy, it is hoped that full-automatic printing