Application of the hottest corona treatment and si

2022-08-12
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The application of corona treatment and single coating in surface treatment

corona technology is an important technology widely used in the surface treatment of plastics, paper and metal foil to improve the adhesion of the surface to inks, paints, adhesives and coatings. Corona treatment technology is widely used because of its low cost, strong controllability, easy operation and high reliability. Starting from the multi knife electrode equipment pioneered by soft company, in the past few decades, the efficiency and functionality of corona treatment equipment have been gradually improved, keeping pace with the technology of high-yield processing and extrusion equipment. After corona treatment, the wettability and adhesion of polymer surface can be changed, while the properties of polymer matrix will not be affected. Typical processing equipment consists of a high voltage electrode and an opposite phase grounding electrode. The antiphase electrode is generally a roller, which plays a guiding role on the treated object at the same time. When the applied voltage reaches the breakdown voltage of air, the electrodes will discharge and generate atmospheric pressure plasma. The insulating coating on the high-voltage electrode and/or reverse phase electrode can maintain a stable and uniform discharge and avoid turning into a high-temperature arc

the physical and chemical processes in the corona discharge process are very complex, mainly due to various chemical reactions induced by plasma in the gas phase and on the polymer surface, so that chemical groups such as hydroxide, ketone, ether, carbonate and ester are combined on the polymer surface with chemical bonds. These groups have polarity, which improves the surface energy and ultimately improves the adhesion of the surface to printing inks, paints, adhesives and various other coatings

corona processing system

recently, soft launched a new CLN station specially developed for narrow width printing. This treatment system is a convenient plug and play type with a series of chain reaction caused by overload, including the treatment station itself, operating touch screen, easy-to-use generator and exhaust emission system. The treatment station is developed on the basis of the CLE series that has been tested for a long time. The CLE series has been completely redesigned and optimized

softal's first multi knife electrode

the firm structure and the anti-corrosion materials used make the product durable, and because of the new module structure, the maintenance is more convenient. Its compact cantilever structure makes it easy to install or refit into production equipment. The new CMB processing station for blown film production line and the famous CR station for ultra wide format processing are corona processing equipment developed for the blown film industry. They are based on the concept of module structure and are optimized for various applications

all soft corona processors are powered by state-of-the-art generators. 7000 series is a new generation of corona generator, and its hardware and software are innovative products. The output power of 7000 series is 1kW to 4kw. The output power of 6000 series single generator is 6kW to 50KW. High power can be obtained by integrating multiple generators. All 6000 and 7000 series generators have famous configurations of soft products, such as CCP automatic speed and width dependent power control, SCT for jump processing, DCR and profi bus and can bus interfaces for uniform corona processing at ultra-low power

reliability is the key

always working reliably under all environmental conditions is the key to achieving economic production. Although modern general electromechanical technology can cope with harsh environmental conditions, the humid environment puts forward special requirements for corona treatment system. If appropriate preventive measures are not taken, unexpected high-cost shutdown accidents may be caused. For a long time, it has been an important advantage of soft equipment that it can work reliably in humid environment. The main factor for this success is the integration of mechanical and electrical aspects, which has now become the standard configuration of most software equipment. Soft's solution for humid environment has optional configurations for the upgrading of new systems and existing equipment, so that the equipment can be completely transformed to meet the requirements of the environment. For humid environments, the optional configurations are SCS, CSF, has and HHV. SCS is a standard configuration for most soft corona generators. Combined with the special ceramics used in corona electrodes, SCS constitutes the basis for the reliable operation of soft in humid environment. Even if there is condensate on the high-voltage components, SCS can ensure that the corona treatment process can be started easily and reliably. Especially in the environment where the temperature and pressure drop from the outside to the inside, CSF can avoid condensation of the return wet air in the corona electrode when the equipment is turned off. Depending on the operation status, CSF automatically controls the brake plate and exhaust fan in the exhaust system. In a very humid environment, and after the corona equipment is shut down for a long time, a large amount of condensate will be generated on the static cold corona electrode during the starting process. Has effectively eliminates condensation by raising the electrode temperature to the operating temperature before starting. HHV can ensure that even under very difficult production conditions, the parts with high voltage in the electrode are at a sufficiently high working temperature, so as to reliably avoid condensate

similar to solutions for humid environments, soft provides first-class technology for all needs in the field of surface treatment, from significantly reducing corona electrode pollution, to rapid maintenance strategies, from non-standard material processing input into computers, to special engineering design and optimized combination of equipment into production lines and processes

corona treatment of sheet and foam

treatment of polymer sheet and foam is a rapidly growing field. Due to the special shape of these products, especially the large thickness, the traditional corona treatment equipment cannot be used in many cases. Recently, soft has developed a new atmospheric pressure plasma source, which is suitable for a variety of materials and structures that previous corona treatment equipment could not handle. The system has a compact structure, so it is easy to install into the existing production line, and can be directly scaled up and applied to a larger processing width, so that users can afford it. Compared with the plasma jet system, these plasma sources are extremely efficient and generally work at a low power density of only 10w/cm. It is not only technically possible to deal with a large width of a few meters, but also economically. 2. The demand of plastic materials (high molecular materials) for experimental machines: it is feasible. In addition to being easy to adapt to the new structure, one of the main uses of this new type of plasma source is to treat thick foam. For open cell foam, eccoh material can meet the strict regulations of smoke and toxicity, and will not produce preferential discharge channels. For closed cell foam, it will not produce pinholes. Moreover, the power requirement of the equipment is small, and it can be used to deal with temperature sensitive foam. In addition, the new system is particularly suitable for honeycomb structures and reinforcing materials

single layer coating

tackifying primer is needed in many occasions of printing and processing industry. Softal and Airliquide jointly developed aldyne, a cost-effective, environmental friendly, atmospheric pressure plasma process technology that replaces the traditional liquid primer. Unlike the corona treatment in which the plasma processing gas is ambient air, the aldyne process uses a gas with stable composition and good control. In this way, the chemical reaction between plasma and polymer surface can be controlled

the functional coating obtained is only a single-layer molecular thickness, generally 0 4nm。 Since aldynetm process does not use any liquid or solid substances, it will not accumulate residues, thus removing the high-cost cleaning process. Moreover, in the aldynetm process, there is no need for drying steps, and there are no problems related to the removal of organic solvents. The molecular coating can be adjusted according to the processing technology. For example, amides, imide groups and amino groups can give materials good adhesion to water-based, solvent based and UV drying inks, paints and adhesives. Aldynetm is a technology that can be easily incorporated into existing production lines. Its main components include a specially designed plasma source (which can control plasma gas at ppm level), a gas delivery system and a complete automatic process control system

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