In the increasingly severe environmental problems, VOCs governance has become a key part of atmospheric environmental protection. Statistics show that the traditional gravure production line in China's printing industry exceeds 10,000. With the increasingly strict implementation of the VOCs-restricted emission policy, packaging and printing The industry is facing unprecedented difficulties.
The Solvent solvent-free gravure printing press which was developed for the past 5 years was formally launched this year with a total investment of nearly RMB 100 million. It has broken through a number of technical difficulties and used cold light source curing and drying technology to achieve true solventless printing for the first time in the field of flexible packaging gravure printing. In 2017, the solvent-free zero VOCs gravure printing machine was identified as a working machine by the Ministry of Environmental Protection and given financial support for development.
Customer demand promotes innovation drive
Under the environment where the pressure of environmental protection is gradually rising, we will contact the upstream and downstream industry chain companies to actively explore the green printing market, make the company's green transformation and upgrading, and enhance the company's ability to innovate. This is an important way for companies to grasp the market initiative.
Since the introduction of solvent-free gravure printing equipment at China International Print & Exhibition in 2016, the technology has attracted the attention of the industry and has received many questions. In response to the problems raised by the company, the Sunde R&D team processed and rebuilt the ink system and solved the problem. The problem of BOPP adhesion has solved the problem of ink odor, viscosity, resistance to cooking, and solved the problems of curing speed and curing intensity of LED lamps.
In the past, traditional printing workshops had a large odor, high concentration of various solvents caused corrosion and oxidation of machinery and equipment, accelerated aging of equipment, and could easily cause fire. Since solvent-free flexible packaging gravure printing machine does not require any solvent, it not only solves VOCs pollution. The problem has also largely solved the effects of solvent evaporation on people and equipment, as well as fire hazards, and improved the security of the printing shop. The cold light source in the machine has cured the color ink when the drying temperature is low, and the workshop does not need to be specific. Temperature, humidity, and environmental requirements are significantly reduced.
The solvent-free gravure printing machine also reduces noise pollution while ensuring the sanitation of the workshop. This is because the device has no gear transmission, and there is no drying fan for the traditional gravure printing machine, so that the noise of the whole machine is controlled below 70 decibels. The operating environment has been greatly improved.
Solvent-free solution to environmental issues
The competition in the flexible packaging industry is still a pattern of low-price competition with serious homogeneity, and the threshold is very low. Coupled with the increasing pressure of environmental protection, solvent-free printing will be a good choice.
Solvent solvent-free gravure printing is a printing method in which 100% solid content of the substrate is printed on the surface of the substrate, and the radiation curing source is dried by radiation curing. The radiation curing source includes UV, EB, etc. The ink used in each color group is UV ink, ink does not contain any organic solvent, the plate making method is gravure plate making.
Since the device uses a cold light source to cure color inks, the inks do not contain organic solvents, and do not require the addition of any organic solvents during use, and are not volatile, truly eliminating the emission of organic volatiles. Due to the use of cold light curing inks, during the printing process No blocking plate, fast drying speed, clearer printing dots. In addition, no solvents need to be added, so the substrate surface VOCs residue is almost zero. At the same time, solventless printing using cold light source curing drying technology, eliminating the traditional electricity, Gas, oil and other heating and drying methods can save energy by more than 70%. In addition, the equipment eliminates the design of drying tunnel, the length of the machine is reduced by 1/2, and the material length is saved by 1/3 or more. The length of the whole machine is reduced and can be greatly reduced. Reduce the loss of materials, simple and safe operation, also reduces the requirements of the plant.
The device has a short print path, improved paper run stability during printing, low drying temperatures, no distortion during paper printing, 100% solid ink content, stable ink transfer, high printing dot stability, and better print definition than offset printing. The machine is even higher and can realize all screen printing processes, including the ability to print Chinese 0.15mm high and English 0.06mm high microtext.
At present, solvent-free gravure printing technology has reached the standard of mature use, and received special authorization. At the same time, it applied for 18 patents.
Source: China Press, Publishing, and Broadcasting
