Self-adhesive label printing equipment
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Self-adhesive label printing equipment is generally divided into three categories: the main method of flexo printing, which is more common in North American countries; the main method of flexo printing and embossing is favored by European users; The way of supplementing the main and flexo is the first choice in the Asia Pacific region. China's self-adhesive label printing industry: more small and medium-sized printing plants, less specialized large-scale printing plants; printing plants with more primary equipment and less high-end equipment. The development of the self-adhesive label printing market is uneven: the coastal areas are developed, the central region is second, and the inland areas are relatively backward. In the printing of self-adhesive labels, mainly letterpress printing, continuous paper feeding is the most advanced printing form, followed by reciprocating type, intermittent paper feeding is the first stage and the lowest precision paper feeding method. Sheetfed sticker printing is a unique processing method in China. It has rarely been seen in foreign countries. The domestic self-adhesive label printing level is only in the initial stage, which is far from the world advanced level. Not only in printing equipment, but also in the design of printing processes, printed materials and labels.
1. Letterpress self-adhesive label printing equipment
Production of letterpress round and round self-adhesive label printing equipment, the products are all satellite continuous paper printing presses, configured with 6-color UV letterpress printing and a set of UV glazing; optional round die-cutting, flat die-cutting, electric Halo treatment, singulation and receipt of the device. To ensure the accuracy of UV glazing, Ko-Pack and Sunrays have changed the traditional roller glazing to flexographic glazing. The amount of varnish coating is determined by the number of anilox rolls, which is not affected by the pressure and printing speed, and ensures the consistency of the gloss of the printed matter.
Flat-pressed intermittent paper-feeding label printing equipment is also a common equipment for label printing. The main transmission mechanism is changed from traditional mechanical transmission to electromechanical integration without shaft transmission. The length of paper feeding can be preset by computer, and the material is automatically pulled by the drum. Paper, completely eliminating mechanical errors. Another significant change is the installation of a UV drying unit that uses UV inks to expand the label printing range, increase printing speed, and eliminate the lamination process.
2. Flexographic self-adhesive label printing equipment
These devices are all narrow-format flexo presses, mainly domestic products, such as Shanghai Ziguang, Xi'an Black Bull, Wuxi Baonan, etc. The equipment has two characteristics:
1 Using UV ink instead of water-based ink, UV ink has good stability and avoids frequent cleaning of printing plates and inking systems. More importantly, the color density of UV inks is greater than that of water-based inks, which improves the print quality of labels.
2 The common use of film-free direct laser plate-making technology avoids the loss of small dots, the level of large dots, improves the image level, and greatly improves the image clarity and printing quality.
Flexographic printing self-adhesive labels are the future development direction. At present, the flexographic printing equipment produced by domestic enterprises using domestic resources and foreign technology is gradually accepted by domestic printing enterprises in terms of printing quality and price. The market share of dry labels is growing rapidly.
3. Die cutting equipment
There are two types of printing methods for self-adhesive labels: one-step, that is, printing and die-cutting are completed at one time. The raw material is input at one end of the machine and the finished product at the other end is suitable for simple label production. Step-by-step, that is, label printing and die-cutting are carried out on two devices, which is suitable for label production with complicated graphics, multiple processes and large batches; step-by-step processing can reduce costs, reduce waste and improve efficiency.
1 roll paper round die cutting machine
The off-line die-cutting machine can not only process the printed self-adhesive label roll material, but also directly die-cut blank labels and folds or cut sheets, with high efficiency and precision.
2 sheet paper flat die cutting machine
Self-adhesive labels printed on sheetfed sheets currently account for 10% of all label production in China. All of these products are die-cut on a flat-press manual die-cutting machine, which is not suitable for self-adhesive materials, and has high labor intensity, low production efficiency and poor die-cut quality.
As a major producer of labels, China is also the country with the greatest potential for label printing. In the future, self-adhesive label printing will develop in many aspects, and label printing factories of various business scopes and processing types have their own development space. The future market for self-adhesive label printing equipment will be very prosperous, new equipment will gradually replace old equipment, and printing technology and processes will coexist in many forms.
1. Flexographic printing equipment
In particular, the number of UV flexographic printing equipment in the field of self-adhesive label printing will increase rapidly, and the market share and quality level of domestically produced equipment will also be greatly improved. The main reason is the rapid development of plate making technology, the more complete supporting services in the flexo printing market, and the label printing market is more standardized.
2. Round pressing circular rotary printing equipment
At present, circular round rotary embossing machines, such equipment will quickly occupy the domestic market.
3. Round pressing circular reciprocating paper feeding half-turn embossing equipment
As the most popular equipment in the self-adhesive label printing industry, there will be rapid development. The price is moderate, the printing quality is stable, suitable for different types of orders (large quantities, small batches and temporary proofing). However, the disadvantage is that the speed is slow, there are certain requirements for the quality of the raw materials, and there are overprint defects.
4. Round flattening letterpress printing equipment
It used to be the main equipment for self-adhesive label printing, but this kind of equipment has two major defects: overprinting is not allowed, the impression cylinder reciprocating, easy to cause label overprinting error; low efficiency, high-speed operation, the machine vibrates severely, can not produce normally Will be phased out.