1、 Background environment for developing solventless gravure press

      Packaging and printing industry is the key source of VOCs emission in China. Since 2013, the state has put forward the requirements for the comprehensive treatment of volatile organic compounds in the packaging and printing industry, and VOCs control in the packaging and printing industry has risen to the national level. In recent years, it is particularly urgent to control VOC emissions in key industries such as packaging and printing.

      In order to solve the problem of VOCs emission and residue of organic solvents in gravure press, two methods of solvent recovery and combustion are mainly used. The two methods have disadvantages: high operating costs, inadequate and incomplete disposal, so the general enterprises are reluctant to adopt them; the combustion method also has the problems of carbon emission and air pollution, which is a temporary and permanent method.

2、 Solutions to VOCs emission from the source in packaging and printing industry

       In order to achieve "vigorously promote source substitution and effectively reduce VOCs generation", Songde R & D adopts solvent-free gravure printing process (youlaite is granted the patent of Songde company), in the production process, 100% solid content ink (without any organic solvent) is used and dried by led-uv light irradiation; the ink used in each color group is UV ink, and the ink does not contain organic compounds Solvent, this way from the source to eliminate the generation and emission of VOCs, the technology has been included in the "national advanced pollution prevention and control technology catalog" issued by the Ministry of environmental protection in 2016, the only printing solution.

3、 Key elements of solventless gravure printing technology

       Solvent free gravure printing technology is the first in the world (see Annex 2 for science and technology novelty search report issued by Guangdong Institute of science and technology information), and has obtained 9 patents. The key technologies to realize zero emission of VOCs are as follows:

1. Solvent free gravure ink

      Solvent free gravure ink has fine particles (up to nanometer level), instant curing, dot enlargement, almost impervious, less consumption, good adhesion, wide range of printing materials; high color strength, stable viscosity, full and bright color, and no fading, which is suitable for packaging products with spot color as one of the anti-counterfeiting marks; the brightness and surface strength of ink film of printed products are high, with high brightness and surface strength Excellent friction resistance, scratch resistance, chemical resistance and heat resistance. As the ink components do not contain organic solvents, the printing process does not need to add solvents. Therefore, solvent-free ink in the production and use of ink will not emit harmful substances to the atmosphere, achieving zero VOCs emission in the printing process, and the solvent residue in cigarette label printing is almost zero.

2. Solvent free LED cold light curing printing technology

      Compared with the traditional gravure printing technology, the drying energy consumption of the printing process is reduced by 70%, which realizes the real energy saving and environmental protection.

4、 Solventless gravure printing machine and printing sample

▲Solvent free gravure press with monochromatic unit arrangement

▲Single color line arrangement solventless gravure printing machine A380

▲Printing sample