With China's accession after the "WTO", to enhance people's overall level of print quality is also rising, the number of high-grade, high-speed printing presses have continued to increase, the market needs and the press supporting the printing rollers are increasingly high quality . We can say the high-end printing rollers with high-end printing machine, in order to have good print products. Currently in China, using a variety of printing rollers, the more common natural rubber roller, synthetic rubber roller or the like, the excellent performance of polymeric material is high-quality rubber roller to press enterprises have gradually accepted by many later printing manufacturers widely used. Among them, the international printing industry generally uses a polyurethane rubber roller, and has gradually replaced the rubber-like plastic rolls (such as nitrile rubber rollers and other products). Polyurethane rubber roller is used in high-end printers should have what characteristics: a rubber roller from the appearance of bright color, the colloid surface smooth and delicate, core bonding adhesive and stick firmly. Cots size will not be much change at different temperatures, able to adapt to hot and humid environment or cold and dry weather conditions. II. Polyurethane Rollers 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. III. Has excellent chemical resistance, ink and printing method is suitable for all types and is ideal for UV inks and coatings Cots Cots. (Especially for diesel fuel, gasoline, dampening oil, kerosene, salt solution such as a good solvent resistance.) IV. 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 3 times -5 times roll. Compression set, resilience, abrasion resistance than synthetic rubber Cots (such as nitrile rubber roller, etc.) better performance. VI. Because adding special formulations of polyurethane materials, changing the its internal molecular structure, and the increase of the water introduced with good genes strong affinity, thus increasing the material's resistance to surface tension of the water and surface water absorption so as dampening water, alcohol series rubber roller, excellent results. V. Roller easy to clean. In the production is very easy to convert shades of color ink as some of the press by Roller, it sticky paper hair, dust and release Zhang dusting to the printing plate and other miscellaneous property, does not require frequent handling clean, easy to produce.