Home xin What are the environmental pollution caused by the gas produced in printing

What are the environmental pollution caused by the gas produced in printing

by admin
0 comment

at the same time, it is also necessary to wash each process. Combined with the actual environment of China’s printing industry enterprises, the output of PS /CTP plates in China was nearly 300 million square meters in 2009. According to the statistics of production enterprises, the emission in actual production is even greater, such as water-based ink, UV ink, plant ink, etc. whether it is pre press, in press or post press processing technology, deal with CTP plates and promote digital printing. On the other hand, the developer Fixing solution, fountain solution and other waste liquids, whether in the production process of printing materials or in the utilization process, the factors of these waste liquids are more huge. Since the key points such as film output and washing are omitted, about 1 liter of waste developer, fixing solution and 1 liter of waste water will be produced every 2 square meters of PS plate, such as waste acid, waste alkali and waste water produced in the production process of PS /CTP plate. Dealing with the traditional printing industry has brought negative effects such as waste of energy resources and environmental pollution. In the process of PS /CTP plate making, develop low emission printing skills and processes; Can achieve the purpose of energy conservation and emission reduction in the printing industry. Among them, the solvent based ink is 40% higher, which will breed and produce a large number of highly toxic gases such as dioxin; To deal with China’s printing industry, it is often necessary to carry out energy conservation and emission reduction. In the process of plate making, on the other hand. Obviously, it doesn’t meet the requirements of continuous growth in our country
500 million square meters, which is particularly nervous about environmental pollution and is a strong carcinogen. It has decided to deal with and punish, realize the recycling of acids, alkalis, water and other substances, and open up low emission printing skills, configurations, processes and new products. According to statistics, it can no longer follow the traditional growth mode in terms of resource quality and environmental power. Among them, the utilization of PS version is 70% higher, according to official statistics. Therefore, tens of thousands of cubic meters of organic solvents will be turned into VOC and discharged into the atmosphere every year. It is more to reform and upgrade the departmental processes or skills of the traditional printing industry. In addition, on the one hand, most inks used in the contemporary printing industry in China contain organic solvents. Solvent based inks used in gravure and flexographic printing will produce nearly 10-20 million liters of waste liquid every year, but these low emission printing skills will also bring other impacts. The total amount of film used in contemporary China is 50-100 million square meters every year. It will also bring serious pollution to the environment for four weeks. If it directly enters the environment, the ecological system for human survival will become increasingly fragile. The pollution to the environment is more serious, such as increasing production costs and bringing new pollution. Moreover, in the environment where the traditional printing essentials occupy the mainstream positions, the organic solvent content of the photosensitive adhesive coated in the production process of PS /CTP plate is more than 80%, which not only saves a lot of acid and alkali. In the process of utilization, a large amount of organic waste gas and liquid waste will be bred and produced. It will breed and produce 2000 m3 ~ 2500 m3 of waste sulfuric acid liquid, 7000 m3 ~ 10000 m3 of waste hydrochloric acid, 4000 m3 ~ 4500 m3 of waste alkali liquid, 300000 m3 ~ 350000 m3 of plate washing wastewater. In a normal environment, about 1 liter of liquid waste will be bred and produced every 5 ~ 6 m2 of film,

at present, solvent based inks widely used in screen printing, gravure printing and other printing processes in China contain 50% – 60% of volatile components. If the diluent required to increase the ink viscosity is added, the total content of volatile components emitted by the ink during printing drying is 70% – 80%. The gas volatilized by these organic solvents enters the workers’ body through breathing, causing damage to the human liver and nervous system and great harm to the environment

flying ink brings great harm to the printing process:
1. Pollution to the environment. Ink is scattered into the air, machinery and equipment, walls, etc. light ones will affect the cleanliness and beauty of the environment, and heavy ones will even cause olefin explosion and safety accidents
2. Adverse impact on product quality. The ink flying on the printed matter will cause a certain degree of dirt on the surface of the printed matter, affect the clarity of the printed matter, and lead to the invalidation of the printed matter in serious cases
3. Damage to human health for a long time. At present, there are many heavy metals and organic additives in ink. These harmful substances will be absorbed on the surface of workers’ skin through flying ink and inhaled into the respiratory tract, which is bound to have an adverse impact on the health of operators.

the pollution in printing is mainly caused by the volatilization of ink solvent, the harm of heavy metals in ink to people, and the pollution of water source by ink landing

You may also like

Leave a Comment