Corona roller and corona machine application key points of film corona solution generally by the corona machine and corona roller with each other, in the field of plastic film packaging and double pull film (BOPP, BOPET, BOPI) in the field of corona roller key selection of rubber rollers to solve the problem, because of the film large format is relatively large, and thus the roller body is also relatively large to Bruckner's BOPP double hanging line as an example, the hauling belt corona rollers in general size In the diameter of 450 * 8700mm, 608 * 8700mm hauling belt, most of the plastic layer selection of silicone rubber. Avoid the back of the corona key to start from three levels:
1, flow extension production line to effectively manipulate the film support;
2, the discharge frame should be constructed reasonable, high precision, discharge frame must have pressure roller, pressure roller and corona roller must carry out harsh dynamic, rotor dynamic balance experiment, axial flutter to be less than 0.05mm. pressure roller working pressure must be suitable, pressure is too large, not the actual effect of the pressure roller, the film is not tightly adhered to the corona roller, the pressure roller on both sides of the force to be consistent. In the film into the discharge frame, it is best to add a spreading roller, to ensure that the film into the corona roller flat, does not cause the back corona.
Corona (electronic, corona) refers to the partial discharge of the surface layer of a charged body in a vapor or liquid substance, which often occurs around the perimeter of high-voltage transmission lines and the top perimeter of a charged body, and can cause reactive oxygen, sulfur oxide and other chemical substances. In substations and routes above 110kV, the light layer similar to corona often occurs, and the sound of "snorting" and "ah mile" is heard. Corona can consume electromagnetic energy, and affect electromagnetic waves. Corona is a very uneven magnetic field in the unique electronic device collapse - flow injection mode of smooth discharge.
Corona is caused by not smooth electric conductor caused by extremely disproportionate electrostatic field, in the absence of balanced electrostatic field around the electrodes around the small angle when the current value rises to a certain value, because of the gas dispersion will produce a discharge, resulting in corona. As in the corona outside the corona rod, corona rod around the electrostatic field is relatively weak, does not produce impact dispersion, corona outside the field of free electrons are basically all electric ions, such positive ions will produce a corona discharge power flow. Simply put, the small angle of the electric conductor electrode discharge on the gas, the formation of corona.
Most of the plastic film (such as polycarbonate film) is a non-polar polymer, interfacial tension is low, generally in the 29-30mN/m, theoretically speaking, if the interfacial tension of an object is less than 33mN/m, at this stage, already know that the printing ink and adhesive can not be adhered to above the solid, and therefore to carry out the corona method of its appearance to solve. The basic principle of the solution is to add high-frequency and high-voltage lines to the processing equipment, causing high-frequency and high-voltage discharges, which result in the formation of tiny aggregates of blue-violet flames. The various positive ions formed after gas hydrolysis accelerate and impact the plastic film in the equipment under the effect of strong electromagnetic field. The chemical bonds of the plastic molecular structure are broken and dissolved, which improves the roughness and area of the exterior. Discharge will also continue to cause a lot of reactive oxygen, reactive oxygen is an oxidizer, can make the plastic molecular structure of air oxidation, resulting in carbonyl and chloroprene and other positive and negative extremely strong functional groups, which in turn enhanced its surface.
Corona recycler application common problems
1、Discharge electrode is not closed in time and cannot be started.
2、The corona roller is smaller than a certain set speed ratio can not be started.
3、Broken film data signal abnormality, the discharge frame can not be closed, and even more can not start. In daily business, once the film is broken, the machine can be automatically switched on and off, alarmed, and the discharge electrode can be opened automatically.
Corona roller and corona machine application key point discharge electrode selection of rotating structure. Once there is a lump on the edge of the cast film, when the fitness of the lump moves to the center of the discharge electrode and the corona roller, the electrode can be opened automatically. After the lump in the past, the discharge electrode automatic calibration, maintenance of the discharge roller and discharge electrode.
Hefeng Machinery Group focuses on the development and application of the surface treatment industry for more than 20 years, corona machine, corona treatment machine, plasma machine, static generator, static eliminator, dust removal machine, UV curing, UV power supply, electronic UV, UV light box, plasma treatment system, vacuum plasma, spark machine, plasma treatment, flame treatment machine, electronic spark machine, EDM impact machine, surface treatment machine, polymer Surface Flowering Machine, UV lamp, UV transformer, and so on. It is a national high-tech enterprise integrating R&D, production and sales.
Our core competitiveness comes from the fact that we never stop launching new products and designing molds, and vigorously investing in the research and development of new products, it is this guiding principle that makes us different, which also enables us to become a real solution-oriented company in the industry. From the design of the solution to the final inspection of the equipment, we pay meticulous attention to every detail to ensure that the quality of our products and customer service meets the highest standards, and with our highly qualified service team and experienced technicians, we have gained an international reputation as a solid and reliable partner.
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