The ceramic anilox roller adopts the plasma method to melt the thermal sprayed chromium oxide powder, melt spray coating on the surface of the metal smooth roller, and firmly combine with the metal roller to form a high-hardness and dense ceramic film, which is ground and polished, and then used The laser beam engraves ink holes on the ceramic surface, multi-beam high-precision laser engraving, regular mesh, smooth mesh, flat bottom, large amount of ink transfer, fast ink discharge, and easy cleaning. The commonly used mesh types are quadrilateral, hexagonal, 45° oblique type, 60° oblique type, S type, etc. Different mesh types and mesh depths correspond to the application of ceramic anilox rollers in different fields.
Compared with ordinary metal anilox rollers, ceramic anilox rollers have obvious advantages, which are embodied in the wear resistance of ceramic anilox rollers, scratch resistance, not easy to block cells, uniform cells, and accurate measurement of transfer media.
Ceramic anilox rollers are mainly used in printing, sizing, coloring, coating, leather, plastic, metal foil, synthetic rubber sheet and other industries due to their excellent performance. The details are as follows:
Flexo printing is a printing method with a relatively high printing speed. Due to the high speed, it also has high requirements for the anilox roller used for ink transfer, and the anilox roller wears relatively fast under high-speed printing, which also There are high requirements for the wear resistance of the anilox roller. The ceramic anilox roller has the characteristics of strong ink adhesion, high hardness, good wear resistance and fast drying. It is a very cost-effective ink transfer roller in flexo printing.
Label printing is currently the field with the highest precision requirements in flexographic printing. The ink transfer accuracy of the label printing roller is very high. Label printing generally uses UV ink, the printing temperature is generally low, and the ink viscosity is relatively high. If the quality of the roller surface is poor, the screen type selection is improper, and the ink is prone to fly ink after the scraper, which affects the overall printing effect. . If the number of label roll lines is relatively high, the mesh wall will be relatively thin, making the mesh wall brittle and prone to scratches under the action of the scraper, resulting in poor printing quality.
Carton printing is different from other printing methods, it belongs to sheet-fed printing. The substrate is corrugated cardboard, the surface of the substrate is relatively rough and has a certain thickness, and the printing accuracy of carton printing is not high compared to flexo printing, which is a kind of low-precision printing method. The carton printing roller needs to have the characteristics of durability and reliability, good transferability, and low cost of use to maximize the benefits of carton printing.
Offset printing is one of the main printing methods at present, which is characterized by high speed and stable printing. Generally, the more traditional ones are chrome-plated water rollers and chrome-plated ink rollers. With the improvement of environmental protection requirements and the emergence of new curing methods such as UV and LED, higher requirements have been placed on the original roller system. Compared with the traditional chrome-plated offset printing roller, the ceramic offset printing roller has the advantages of strong wear resistance and stable ink transfer. Ceramic glazing rollers have good adaptability to water-based varnish and UV varnish. The application of different mesh types and thread counts can have better performance for different applications such as frosted reverse, bright light, matt, functional coating, etc.
Ordinary coating rollers are mainly used for anilox roll coating and sizing equipment. This coating equipment mainly uses anilox (concave) coating rolls for sizing coating. The coating is uniform and the coating amount is accurate. When coating with anilox roll, the coating amount is mainly related to the concave depth of the anilox roll and the type of glue. The deeper the concave depth of the anilox roller, the greater the amount of glue transferred from the concave holes to the substrate; on the contrary, the shallower the anilox roller mesh concave depth, the amount transferred to the substrate is correspondingly reduced.
Micro gravure roll, the so-called micro means that the diameter of the anilox roll is smaller than that of the traditional anilox roll. The diameter of traditional anilox rolls, which are widely used today, is usually 125 to 250 mm. The diameter of the gravure roll is usually only 20 to 50 mm, and the slightly larger is 50 to 100 mm. The smaller the diameter of the roller, the smaller the contact line between the substrate and the roller. When the contact line is smaller, the possibility of coating defects is less.
Like the traditional anilox coating, in the gravure coating process, the roller is immersed in the coating disc, the solution is brought up by rotation, and then the excess solution is scraped off by a doctor blade, and the remaining solution is filled with In the cavities of the gravure roll, the accumulated liquid in the cavities is transferred to the coated substrate at a certain rate. Ceramic gravure rolls are widely used due to their narrow contact area, reverse pressureless rubbing and correction of stencil marks in pressure coating, deep and uneven coatings. Mainly used for some high value-added diffusion films, composite films, and hardened protective films.
With the gradual development of new energy around the world, the demand for lithium-ion power batteries is growing. The lithium battery separator is coated with one or two layers of ceramic surfaces on the substrate separator by means of microgravure extrusion coating. The ceramic separator increases the surface strength of the original separator, which enables the battery to achieve excellent performance in terms of high temperature resistance, puncture resistance and short circuit resistance, and does not affect the flow of lithium electrons, improving the safety of lithium batteries. Gravure coating has been widely used by the lithium battery coating industry due to its high production capacity, convenient operation and low price investment. A lithium battery coating roller with excellent performance will directly affect the product quality and production efficiency of the lithium battery separator.