Gravure Printing Process Green Environmental Protection Measures Environmental issues Gravure ink contains a large amount of volatile organic solvents, accounting for almost 50% of the gravure ink. Among them, low-boiling, highly volatile solvents such as xylene, toluene, butanol, and butanone contain aromatic hydrocarbons that are both toxic and flammable, and are major contributors to environmental pollution. In addition, the gravure printing speed is extremely high, and it is necessary to use fast-drying inks with extremely strong volatility. External drying (gravure printing with a drying process) is also required by electricity or infrared heating to meet the printing requirements, resulting in large gravure exhaust emissions. Gravure printing is particularly prominent in the environmental issues of all printing processes. Many authorities in the printing industry believe that gravure printing will lose its competitiveness in the market and will eventually be replaced by Other printing technologies unless practical measures are taken to solve the gravure problem of gravure printing and improve the environmental performance of gravure printing.
Solution 1. Develop Direct Plate Technology (CTP)
The rapid development of the non-film electroplating engraving process and the development of the direct plate making technology (CTP) eliminates the need for complicated processes in the past engraving process, increases the speed of plate making and film processing, reduces waste discharge, and reduces environmental pollution. The laser-engraved gravure platemaking machine developed by EPikOs has solved the environmental pollution problem caused by this, and it is a veritable CTP engraving and gravure plate making process.
2. Solvent-free benzene and water-based gravure ink printing Gravure printing requires a large amount of organic solvents in the production process. The development of "water-based gravure printing ink" is of great significance for gravure printing. Gravure printing is mainly used in the field of packaging and printing, so gravure printing inks must be developed in the direction of non-benzene type and adapt to diversified printing substrates. Currently, it is necessary to effectively control the solvent residual amount of the solvent type ink. Solvent is an important part of gravure ink, and it is also an indispensable material in plastic film composite adhesives. Toluene and other organic solvents tend to remain in the printed film. This type of printed matter, if used in food packaging, will bring about Big hazards. Gravure ink production is being restricted by regulations such as Fire Protection Law, Labor Safety Law and Health Law. Therefore, it is necessary to actively develop green gravure inks that meet environmental protection requirements. The use of water-based inks is an inevitable trend.
Water-based gravure printing inks were widely used in the printing of packaging paper and cardboard carton in the 1970s. Because the evaporation and drying of the paper are better in absorbing and drying, the drying problem of water-based ink is better solved and it is popularized earlier. . However, the printing ink in the packaging film is water-based, and it has not reached a real practical stage until now. This is mainly because the problem of the drying of the water-based gravure ink in plastic film printing has not been well solved. However, it can be predicted that gravure printing will become an important issue in the water-based printing of film packaging materials. In addition, from an overall point of view, one of the important reasons why water-based gravure inks are not popularized further is that, if the printing speed and print quality of the original gravure inks are to be maintained, not only the performance of existing gravure printing machines should be enhanced, And must be equipped with high-precision shallow hole printing plate (reducing the use of ink, increase the drying speed), etc., and the entire printing system improvement requires a considerable investment.
According to another report, Hunan Jingxin Technology Co., Ltd. and Hong Kong Yip's ink company jointly developed a so-called "GL gravure alcohol-soluble composite plastic ink." It is an alcohol-soluble nitrocellulose resin combined with other advanced resins. The environment-friendly ink products have the characteristics of low odor and no benzene. The production of such environmentally friendly inks will definitely increase the competitiveness of gravure printing in the field of packaging and printing.
3. Development of Gravure Wire Processing In 1998, Sarudi Company produced a set of 10 printing units and 3 or more dry compound units. (Solvent-free compounding is replacing solvent compounding, especially compounding with polypropylene as the base material. Because the solvent-free compounding process is suitable for reducing costs, and because there is no need to provide a ventilation system on the compounding machine, the machine structure is simple, energy saving during use, and there is no problem of solvent evaporation, saving resources and protecting the environment, so the dry compounding process is compounded in the future. The main theme of packaging development, a solvent-free composite unit and a flexible packaging gravure printing machine for exhaust gas treatment rooms. The connection compounding has not been used on domestic gravure printing machines, mainly because of the small size and product volume.
Many printing units that are currently very important to environmental protection have not yet been used on domestic gravure printing machines. These units are mainly: fully enclosed printing units, which prevent solvents from volatilizing into the surrounding environment, improving the environmental performance of gravure printing machines, and improving the environment. , And easy recycling; pre-cleaning system, the use of pressure solvents on the gravure printing machine, cleaning the printing plate ink film, can greatly reduce solvent evaporation and manual cleaning workload, in addition, can be used ultrasonic gravure cylinder cleaning system, In order to reduce the amount of solvent used, the solvent recovery device mainly adopts activated carbon to absorb the solvent gas produced in the production. Since the benzene solvent gas is not allowed to be discharged outdoors, it must be recycled 100%, and the device can reuse the recovered solvent to reduce it. The cost of the solvent. In addition, foreign advanced manufacturers generally fully consider the applicability of gravure printing presses to different inks, enabling them to adapt to the changing conditions of inks for a long period of time, and to meet the increasingly stringent requirements of the sanitary environment. The gravure machines it produces are suitable for both applications. Solvent inks are also suitable for water-based inks. It is not difficult to understand that this type of machine has higher requirements for material selection and drying.
In short, gravure should pay attention to the following aspects in the development of environmental protection:
1 automatic gravure roller electroplating;
2 rapid implementation of non-film electroplating engraving process;
3 photopolymer thin roll gravure process;
4 Development of wraparound gravure wrapped on rollers;
5 digital fast proofing;
6 Gravure printing presses should develop towards multi-purpose, multi-color, high-speed, automation, linkage, and environmental protection;
7Realize the printing of water-based gravure printing ink, and effectively control the residual amount of solvents printed by solvent ink.
Solution 1. Develop Direct Plate Technology (CTP)
The rapid development of the non-film electroplating engraving process and the development of the direct plate making technology (CTP) eliminates the need for complicated processes in the past engraving process, increases the speed of plate making and film processing, reduces waste discharge, and reduces environmental pollution. The laser-engraved gravure platemaking machine developed by EPikOs has solved the environmental pollution problem caused by this, and it is a veritable CTP engraving and gravure plate making process.
2. Solvent-free benzene and water-based gravure ink printing Gravure printing requires a large amount of organic solvents in the production process. The development of "water-based gravure printing ink" is of great significance for gravure printing. Gravure printing is mainly used in the field of packaging and printing, so gravure printing inks must be developed in the direction of non-benzene type and adapt to diversified printing substrates. Currently, it is necessary to effectively control the solvent residual amount of the solvent type ink. Solvent is an important part of gravure ink, and it is also an indispensable material in plastic film composite adhesives. Toluene and other organic solvents tend to remain in the printed film. This type of printed matter, if used in food packaging, will bring about Big hazards. Gravure ink production is being restricted by regulations such as Fire Protection Law, Labor Safety Law and Health Law. Therefore, it is necessary to actively develop green gravure inks that meet environmental protection requirements. The use of water-based inks is an inevitable trend.
Water-based gravure printing inks were widely used in the printing of packaging paper and cardboard carton in the 1970s. Because the evaporation and drying of the paper are better in absorbing and drying, the drying problem of water-based ink is better solved and it is popularized earlier. . However, the printing ink in the packaging film is water-based, and it has not reached a real practical stage until now. This is mainly because the problem of the drying of the water-based gravure ink in plastic film printing has not been well solved. However, it can be predicted that gravure printing will become an important issue in the water-based printing of film packaging materials. In addition, from an overall point of view, one of the important reasons why water-based gravure inks are not popularized further is that, if the printing speed and print quality of the original gravure inks are to be maintained, not only the performance of existing gravure printing machines should be enhanced, And must be equipped with high-precision shallow hole printing plate (reducing the use of ink, increase the drying speed), etc., and the entire printing system improvement requires a considerable investment.
According to another report, Hunan Jingxin Technology Co., Ltd. and Hong Kong Yip's ink company jointly developed a so-called "GL gravure alcohol-soluble composite plastic ink." It is an alcohol-soluble nitrocellulose resin combined with other advanced resins. The environment-friendly ink products have the characteristics of low odor and no benzene. The production of such environmentally friendly inks will definitely increase the competitiveness of gravure printing in the field of packaging and printing.
3. Development of Gravure Wire Processing In 1998, Sarudi Company produced a set of 10 printing units and 3 or more dry compound units. (Solvent-free compounding is replacing solvent compounding, especially compounding with polypropylene as the base material. Because the solvent-free compounding process is suitable for reducing costs, and because there is no need to provide a ventilation system on the compounding machine, the machine structure is simple, energy saving during use, and there is no problem of solvent evaporation, saving resources and protecting the environment, so the dry compounding process is compounded in the future. The main theme of packaging development, a solvent-free composite unit and a flexible packaging gravure printing machine for exhaust gas treatment rooms. The connection compounding has not been used on domestic gravure printing machines, mainly because of the small size and product volume.
Many printing units that are currently very important to environmental protection have not yet been used on domestic gravure printing machines. These units are mainly: fully enclosed printing units, which prevent solvents from volatilizing into the surrounding environment, improving the environmental performance of gravure printing machines, and improving the environment. , And easy recycling; pre-cleaning system, the use of pressure solvents on the gravure printing machine, cleaning the printing plate ink film, can greatly reduce solvent evaporation and manual cleaning workload, in addition, can be used ultrasonic gravure cylinder cleaning system, In order to reduce the amount of solvent used, the solvent recovery device mainly adopts activated carbon to absorb the solvent gas produced in the production. Since the benzene solvent gas is not allowed to be discharged outdoors, it must be recycled 100%, and the device can reuse the recovered solvent to reduce it. The cost of the solvent. In addition, foreign advanced manufacturers generally fully consider the applicability of gravure printing presses to different inks, enabling them to adapt to the changing conditions of inks for a long period of time, and to meet the increasingly stringent requirements of the sanitary environment. The gravure machines it produces are suitable for both applications. Solvent inks are also suitable for water-based inks. It is not difficult to understand that this type of machine has higher requirements for material selection and drying.
In short, gravure should pay attention to the following aspects in the development of environmental protection:
1 automatic gravure roller electroplating;
2 rapid implementation of non-film electroplating engraving process;
3 photopolymer thin roll gravure process;
4 Development of wraparound gravure wrapped on rollers;
5 digital fast proofing;
6 Gravure printing presses should develop towards multi-purpose, multi-color, high-speed, automation, linkage, and environmental protection;
7Realize the printing of water-based gravure printing ink, and effectively control the residual amount of solvents printed by solvent ink.
Jinshun Tools Co., Ltd. , http://www.airpaintandtools.com