In recent years, the prosperity of China's market economy has also led to the development of food and beverage, daily chemical, pharmaceutical, electronic home appliances, supermarket retail, logistics and storage and transportation industries, and the development of these industries will surely be the relevant supporting label Printing brings huge business opportunities and broad development space. Self-adhesive labels are precisely the fastest growing branch in the entire label field. Therefore, it is not difficult to predict that China's adhesive label market will usher in a broader room for growth, and the corresponding adhesive labels Printing will also usher in a new spring of development.
Before we understand the printing of sticker labels, let's start with the most basic sticker structure to understand sticker labels.
Self-adhesive labels are also called self-adhesive labels. They are generally made of paper, film or special materials as a fabric, coated with adhesive on the back, and coated with silicon-backed paper as a protective material. They are processed by printing and die cutting. Later becomes the finished label. In application, just peel off from the backing paper and gently press to stick to the surface of various substrates, or use the labeling machine to automatically label on the production line. 
Sticker structure diagram
Self-adhesive label printing is very different from the printing of traditional printed materials. Self-adhesive labels are usually printed on label linkages. Printing, die cutting, waste discharge, slitting and rewinding are completed at one time. , Has high requirements on printing process and printing equipment.
Traditional self-adhesive label printing technology has been quite mature, and with the increase in demand for variable information labels with anti-counterfeiting or traceability functions, digital printing technology has gradually expanded its strength in the field of self-adhesive label printing. Digital label business The proportion of volume is also increasing year by year.
The common digital adhesive printing methods in the market mainly include carbon ribbon printing, inkjet printing and laser printing. The ribbon printing method is slow, and it is difficult to cope with large business volume. The inkjet printing quality is not good enough, and the printing materials are relatively limited. The laser printing technology has good performance in terms of speed, print quality, and printing materials. According to different curing methods, the digital laser technology in the market can be divided into two major categories: thermal printing laser technology and cold temperature laser technology. After theoretical analysis and practical application of the market, it is not difficult to find that only cold temperature laser technology is the most suitable. Printing of stickers.
Brief introduction of cold temperature laser technology
The cold temperature curing method (taking NIPSON as an example) uses a xenon lamp tube whose wavelength matches the carbon powder to irradiate the carbon powder, ignites at a high voltage of 25KV, and maintains the ignited state at a current of 400mA. The instantaneous current when flashing is up to 250A, and it goes out during standby. This curing method is very different from the radiation method. It can continuously radiate energy, and due to the matching effect of the wavelength, the huge energy burst only heats the toner and has little effect on the printing medium. The flashing frequency of the cold temperature flashing fixing matches the speed, thus ensuring the curing effect of the variable information printed content of the label.
Schematic diagram of NIPSON cold temperature non-contact toner curing process
Advantages of cold temperature technology to ensure the production of safety stickers
Glue overflow is a common problem in the printing of self-adhesive labels. Once the glue overflow occurs, the generated glue scale will not only seriously affect the printing quality of the self-adhesive, but also cause certain damage to the printing equipment. The main reason for the phenomenon of adhesive overflow is from the label material itself and the adhesive printing equipment.
For the phenomenon of glue overflow caused by the quality of materials, the only solution is to try to use relatively high-quality raw materials for self-adhesive labels to ensure the basic quality of self-adhesive labels; improper selection of printing equipment often leads to the overflow of self-adhesive labels The culprit of the glue phenomenon.
The curing temperature of thermal printing laser technology around 200 ℃, and its large hot rod pressure will often reveal the phenomenon of adhesive overflow, and the birth of cold temperature laser technology completely eliminates the laser printing technology in adhesive labels This drawback when applied in the field. Take NIPSON cold temperature technology as an example, its curing temperature will not exceed 50 ℃, and the printing medium will not be heated when curing the toner, which will avoid the problems such as water loss and deformation caused by thermal printing laser technology, and will not dry. The phenomenon of glue overflow of the glue material avoids equipment damage and greatly facilitates the subsequent processing of the product.
In addition to avoiding the phenomenon of adhesive overflow and improving the printing quality of adhesive labels, cold temperature laser technology also has some other unique advantages.
Other application advantages of cold temperature technology
The cold temperature technology's ultra-low curing temperature makes every part of the printing equipment not affected by high temperature. Excellent high-end cold temperature laser printers, such as NIPSON, have their own automatic cooling system, which can ensure long-term work, reduce losses, and consumables. The service life is much higher than ordinary printing equipment, which effectively reduces the production cost. In addition, its high speed and high productivity advantages can further ensure the stability of production.
Cold temperature technology can not only easily handle the printing business of self-adhesive label materials, but also realize high-quality printing of label numbers and barcodes on media such as coated paper, offset paper and PVC. In addition, the cold temperature printer can also complete the secondary variable information printing on the silver paste overlay coating. At present, medium-sized cold-temperature laser printers commonly used in the label field must use perforated paper, while high-end cold-temperature laser printers can also use non-perforated paper feeding for high-speed and efficient production.
Nowadays, with its high-quality sticker printing quality, cold temperature laser technology has become the most advantageous sticker label printing technology in the minds of many printing companies that "taste its sweetness". Its super business development efficiency and extensive media processing capabilities have gradually attracted more and more investment attention. We believe that with the continuous expansion of the self-adhesive digital label market, the cold temperature laser printer will also usher in a broader market prospect.
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