Cots are important parts on the press, have a significant impact on the quality of the printed product. Cots have on different types of presses different role, how to choose the quality and performance of the printing rollers, printing plant to improve production efficiency, meet customer production requirements, quality assurance in print, has a very important significance. Currently in China, using a variety of printing rollers, the more common natural rubber roller, synthetic rubber roll. Among them, the international printing industry generally uses a polyurethane rubber roller, and has gradually replaced as NBR rubber rollers and other rubber-like rollers. Features high-grade printing rollers should have what features, in general, high-grade rubber rollers have the following characteristics: First, polyurethane rubber roller colloids have sufficient surface viscosity. Therefore Cots good ink transfer and ink holdout in the printing process, ink performance can be a good parent to ensure high-quality printing. Second, we have excellent physical properties, long-term use will not make Cots harden, aging, and tear resistance, good resilience, excellent wear resistance. Long life, easy to save, long-term storage does not affect the results. Cots natural rubber and synthetic rubber roll unbearable pressure, high-speed rotary machines, high temperature, high humidity of the production environment can also operate as usual no effect (polyurethane rubber roller tensile strength, abrasion resistance natural rubber roll 3 times -5 times compression set performance synthetic rubber-like elasticity, abrasion resistance than NBR rubber rollers roll better. Third, with excellent chemical resistance, suitable for all types of inks and printing The method is very suitable for the coating rubber roller and UV inks rubber roller, etc. (especially for diesel fuel, gasoline, dampening oil, kerosene, salt solution such as a good solvent resistance.) Fourth, from the appearance of high-grade rubber rollers Judging bright color, colloid surface smooth and delicate, core bonding adhesive and stick firmly. Cots and size will not be much change at different temperatures, able to adapt to hot and humid environment or cold and dry weather conditions. V. water has a good affinity: As a special formula polyurethane material is added, changed its internal molecular structure, to introduce and increase the water has a good affinity factor, increase the material's resistance to surface tension of the water and surface water absorption, it is used as dampening water, alcohol series rubber roller, with excellent results. Six high-grade rubber rollers for easy cleaning. In the production is very easy to convert shades of color ink as some of the press roll by version, it can stick to Miscellaneous features paper hair on the plate, dust and release Zhang dusting, etc., does not require frequent handling clean, easy to produce.