Recently, the ink special drying system of Guangzhou Jinchuang Environmental Technology Co., Ltd. (hereinafter referred to as Jinchuang Company) successfully "transformed the ink printing drying of PVC decorative materials" - Zhejiang Haorui Baike Packaging Co., Ltd. (hereinafter referred to as Haorui Baike). So far, the problem of low speed and high energy consumption of PVC ink printing has been fundamentally solved.
VOCs governance by means of source substitution has been a hot topic in the industry, and ink printing has also attracted much attention. However, when it comes to ink printing, problems such as difficult transformation, slow speed, high energy consumption, and easy anti-sticking have plagued various enterprises, which makes many enterprises hesitate to adopt ink printing.
The success of Zhejiang Haorui Baike PVC ink printing and drying has also brought new hope to the printing and packaging industry of decorative materials. According to Mr. Gu of Holdback, in the process of replacing the source with water-based ink, Mr. Gu was also deeply troubled by the problems that might be encountered in using ink printing. Finally, after understanding the performance of the equipment and ink printing attempts for many times, Mr. Gu successfully adopted ink printing and solved the drying problem that plagued ink printing. Speaking of the drying technology of Jinchuang, Mr. Gu was worried about environmental protection and printing efficiency, Worried about the high energy consumption of ink drying finally landed.
So, how can "ink drying" achieve the problems of low emissions, low energy consumption and high efficiency printing?
The essence of drying is to solve the evaporation of water during drying process and drain the water vapor in time to keep the drying object dry. Under static drying conditions, continuous heating and ventilation can quickly solve the drying problem of the object; Under dynamic drying conditions, continuous heating will harm the drying object. The discharge of large air volume increases the design difficulty of the oven carrier. At the same time, because the exhaust cannot be circulated, the energy consumption is particularly high. What about the technical characteristics of ink drying system of Jinchuang Company:
1. Save more than 70% energy.The air compressor provides a heat source for heating and drying, and the energy efficiency ratio during drying can be as high as 1:3 (that is, 1 kilowatt-hour electricity generates 3 kilowatt-hour electricity), which achieves the ultimate in energy saving and consumption reduction. Practice has proved that the energy consumption of our equipment can be reduced by 70%, and the actual measurement shows that each group of ovens only consumes about 10 kilowatt-hours of electricity per hour. According to the calculation of 10-color printing machine, the enterprise can save more than 300000 yuan per year.
2. The printing speed is increased by more than 50%.The hot air processed by the drying system can reduce the humidity to less than 10%, and send the hot air with a little less than the normal air volume and a little lower temperature to the oven, so that the moisture on the ink can evaporate rapidly, the substrate can be dried quickly, and the low temperature drying can ensure the drying effect, and there will be no false drying, anti-sticking and other ink application problems, and the printing will continue to be stable.
3. Low exhaust, which is only 20-30% of the supply air.The drying system with independent intellectual property rights is adopted to discharge water and part of alcohol, and 70% - 80% of the air and heat are circulated in the printing machine oven and ink drying system, that is, the air and heat are circulated, and water and alcohol are discharged.
4. The traditional printing machine does not need to be changed, and it can be directly printed in ink.There is no need to make any changes to the original printing machine body. Just connect the Jinchuang ink drying system to the printing machine oven with air duct, replace the original heating and air supply parts, and then use it. It is very simple and convenient, complete the upgrading of oil to water at the minimum cost, and take into account the drying of solvent ink brush. The air volume and temperature requirements are lower.
After the transformation of Zhejiang Haorui Baike Company, the situation is as follows:
Press data: version depth 35 μ； The height of the oven is 180cm, the width is 1250mm, and the design speed of the ink printing machine is 100m/min; Color deck: 5 colors (common 3 colors), 4000m ³/ H/Color deck.
Printing products and temperature: PVC decorative materials, drying temperature<60 °;
Ink composition: dilute the original ink with diluent 1:1, add 50% water;
Ink printing speed before transformation: 30-40m/min
After transformation, the ink printing speed is 100 m/min (the printing machine is not limited, and is expected to be around 150 m/min)
Energy consumption before transformation: 45KWh/color deck
Energy consumption after transformation: 15KWh/color deck
Reconstruction of front air: 12000 m ³/ h
Reconstruction of front air: 2500m ³/ h
At the same time, after using ink printing, the workshop has no smell, and the printed products completely meet the customer's requirements.
So far, the special drying system for ink printing of Guangzhou Jinchuang Technology Co., Ltd. has been successfully applied to the drying of PVC ink printing after the soft packaging of food, tissue packaging of sanitary materials and paper packaging, and has opened up a new field of ink printing drying technology. Guangzhou Jinchuang Technology Co., Ltd. will adhere to the concept of "only to make a good printing dryer", and contribute to the printing and packaging industry and the blue sky and white clouds of the motherland.
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