Overview of the hottest flexographic printing mark

  • Detail

Introduction at the end of the 19th century, the British used a rotary rubber plate printing machine to print simple trademarks, paper bags and words on packaging paper. Because aniline dye was used to make ink, it was called aniline printing. Soon, it spread to Europe and the United States at the beginning of the 20th century. Through the improvement of ink, printing machine and dryer, we began to print simple patterns and words on cellophane, which was soon recognized by the society. Around 1940, the United States invented the corrugation roller, which greatly improved the quality of printing

at the printing conference held in Stockholm, Sweden, in 1952, the title of aniline printing was completely rejected, and the participants unanimously agreed to change it to flexography. At that time, the meaning of its discussion was that because photosensitive resins had sprouted, polyethylene and polyester appeared, and the carrier used as substrate was greatly increased, so the application way of flexography was flexible and could be suitable for printing for various purposes. Therefore, it was named. Without understanding its background, domestic translators literally translated halogen-containing flame-retardant PP as the main flame-retardant material into flexographic printing, which spread, It is still used today. In the first half of the 20th century, after being used to print transparent non absorbent packaging material cellophane, its application expanded rapidly, involving polyethylene and various synthetic resin films. As a printing method of packaging materials, it laid a foundation in European and American countries

second, the current situation of flexible printing in Europe, America and Japan

the market share of water-based printing in the United States accounts for about 65%. The proportion in Europe is about 36%. Japan is only 3%. Although Japan does not have as many flexible printing equipment as Europe and the United States, why is there such a big gap? First, because of the different values of packaging. The so-called flexographic printing is a kind of letterpress printing, which uses a soft version. Simply put, it is a roller like stamp. This is not recommended for use in exterior wall insulation systems. Although the accuracy of gravure printing is poor, it is cheap and easy to operate. But in Japan, what people want is a fairly exquisite package printed matter without any stains and color differences. In Europe and the United States, a slight defect is not a problem, and it can still be calmly displayed. It is this difference in values that leads to the different status quo of flexible printing in the two places

secondly, the use of chemicals in Europe and the United States is quite strictly controlled, and the total amount control of the industry is implemented. The total amount limit does not refer to a single enterprise, but to the entire industry. For printing, not only gravure printing, but all types of printing enterprises are included. For example, after a new printing enterprise is completed, it cannot start production without obtaining the right to use it. The production can only be carried out after the transfer or purchase of the right of use from other enterprises, which has led to the emergence of a large number of environmental friendly flexible printing enterprises in Europe and the United States, for example. In addition, since the printing plants in Japan have not adopted independent restrictions on the use of toluene, MEK and other chemicals, it is difficult for them to enter the strictly controlled European and American markets

III. The development of flexible printing in Japan

Japan introduced this technology from the beginning of the 20th century to print corrugated paper, paper bags, etc. unlike Europe and the United States, it has not been used in the field of flexible packaging materials and cartons at first. Due to the dissatisfaction with the quality of flexible printing and the already introduced gravure and offset printing technology has met the domestic demand, flexible printing has not been well popularized in Japan, Even in the past 20 years, it has almost stagnated. With the continuous improvement of flexographic printing technology, it has caught up with gravure printing and offset printing in terms of environmental protection and printing quality, which has attracted more and more attention from the printing industry in Japan. Therefore, flexographic printing has developed by leaps and bounds in recent years

in the past 10 years, flexible printing has become the mainstream printing method in Europe and the United States. In the European flexo printing market, the printing of cardboard boxes has increased at a high speed of 4 ~ 8% per year. At the same time, in the field of flexible packaging printing, there is also a clear trend from gravure printing to flexible printing. Japan has also gradually realized the advantages of flexible printing in environmental protection and production efficiency, but its enthusiasm for use is far from as high as in Europe. Especially for those customers who pay attention to the printing restoration effect, many people still think that the effect of flexible printing is not as good as offset printing and gravure printing. But in fact, with the promotion of CTP of flexible printing and the emergence of flexible printing machine with toothless transmission structure, substantial development has been made in improving accuracy. With the arrival of a new round of printing equipment renewal cycle, a large number of newly introduced flexible printing equipment provide a hardware guarantee for the future development of flexible printing technology in Japan

IV. 2351 excessive users of flexible printing have paid additional "packaging waste management assistance fund" brush scope of application

more and more enterprises are trying to achieve commodity differentiation through the color of packaging, so that people have higher and higher requirements for the exquisite degree of printing. No matter for the uneven, flexible and thick printing carrier, flexible printing can give full play to its advantages in color restoration

flexible printing is directly printed on the printing carrier after water-based ink or UV ink is applied to the high elastic resin relief plate with a certain thickness by the corrugated roller. Therefore, flexible printing has strong adaptability to materials with poor surface smoothness (such as corrugated paper), film, cloth, non-woven fabric, etc. And the multi-color (such as 8-color) printing of flexible film and film has a good performance in color reduction. At the same time, flexible printing is very suitable for thin, uniform coating printing. By overlapping coating various resins and drugs, it has become possible to further improve the accuracy. In recent years, with the progress of materials used for flexible printing and printing technology, exquisite color printing products can be produced through high-speed printing. Needless to say, the stable display of fine small characters, even the expressiveness of the sense of hierarchy has also been significantly improved. For example, the number of printing lines with 150 lines can represent a hierarchy of 2 ~ 98%

v. what kind of material can flexible printing print on?

the most suitable printing material for flexible printing should be corrugated cardboard. It is generally believed that about 80% of corrugated cardboard on the market is printed by flexible printing. A major feature of flexible printing is that it uses soft plates. Up to now, the rubber (resin) plate with a thickness of 7 mm is generally used for flexible printing, so as to avoid the influence of uneven surface materials like corrugated board on printing. In addition to corrugated board, it can be said that flexible printing is most suitable for materials with poor smoothness such as non-woven fabrics and paper napkins

as the requirements for printing accuracy of these prints mentioned above are mostly only about 65 lines, many people have the feeling that as long as the products of flexible printing can be seen clearly, there is no requirement for printing quality. However, recently, flexible printing is not limited to those rough and difficult printing materials. Like offset printing and gravure printing, this emerging printing method is increasingly accepted by traditional printing

at present, it is not only corrugated paper, paper bags, shopping backpacks, packaging paper and other packaging materials, but also paper containers such as cosmetics and snack boxes and liquid beverage paper containers such as milk bags. Flexible printing is used in soft packaging materials such as fast food noodles and snacks, diapers and rice bags. Flexible printing is also used in packaging materials, paper bags, labels, paper napkins, non-woven fabrics, tapes, bellows, etc., which are widely used in commercial and medical fields. In fact, not only corrugated board, flexible printing is gradually favored in the field of flexible packaging

flexible printing for printing materials with high smoothness (printing materials with low requirements for the softness of plates), quite thin plates can be used, such as 1.14mm ~ 1.70mm, and products with more than 150 lines can also be printed. Some can even reach the printing accuracy of 200 lines

VI. flexible printing is "mother's choice"

from destroying and polluting the environment to caring for "people" and "the earth". With the enhancement of people's awareness of environmental protection, flexible printing can fully comply with the requirements of laws and regulations in this regard

although flexible printing can use water-based ink, UV ink, solvent ink and other printing inks, flexible printing has been highly recognized in Europe and America because it can use environmental friendly water-based ink. Flexible printing has gained overwhelming market share in some printed materials that directly contact human body, especially the packaging of food and pharmaceutical products. At the same time, because the amount of ink used is small, the amount of residual solvent is also small, which is particularly suitable for the printing requirements of food packaging. In addition, because water-based inks use alcohol based solvents, there will be no problem in product safety

in 2002, Saitama Prefecture of Japan issued environmental regulations, and all kinds of plate making for printing became the object of control. Chiba Prefecture, Tokyo and other places are also preparing to introduce corresponding regulations. With the recent enhancement of national environmental awareness, environmental friendly flexo printing is more worthy of our expectation

v. unparalleled high production efficiency

another advantage of flexible printing is its high production efficiency. The flexible printing machine can complete the integrated production from roll paper to post-processing at an unprecedented high speed. With this, the flexible printing machine can achieve uninterrupted continuous processing, including post printing processing, which greatly improves the production efficiency. Recently, multi variety and small batch printing has gradually become a trend, and flexible printing just conforms to this trend. At the same time, because of its integrated production, it has more advantages in quality control

when we see the finished printing products, we often hear such exclamations, "is this really the product produced by flexo printing?"

in recent years, the thickness of corrugated board has also become thinner and thinner. There are fine corrugated paper that is a little thicker than ordinary paper. Direct printing on corrugated board makes the advantages of flexible printing get more and more attention. Those who are engaged in the production of food related cartons (folding boxes) and flexible packaging, as well as those who try to achieve commodity differentiation through the color of the outer packaging, please be sure to try flexible printing

source: Chinese labels and stickers

Copyright © 2011 JIN SHI