Many people in the industry know cot is covered with vulcanized rubber made of roll-formed article has sufficient surface viscosity. Cots are mainly used in paper making, printing and dyeing, printing, food processing, and therefore the choice of adhesive is important. So how to choose the right adhesive polyurethane rubber roller it? This has become a lot of friends in the industry are concerned about the issue today and to explore with relevant content. The adhesive valence bond theory, can be formed between polar molecules of the polymer material and the metal surface with a bond and van der Waals forces, leaving a tight bond between the material and the metal. In the roll core primer coating containing a plurality of isocyanate groups (adhesive), to enhance the adhesion with good effect. This is because the polyisocyanate can be reacted with a polyurethane material, and an adhesive layer to form a rigid, integrally formed with the iron roll core. An adhesive layer isocyanate group, a benzene ring, a urethane group and the metal roll surface oxides and iron atoms interact to form a chemical bond or secondary bonds (such as hydrogen bonding) or the like, so that between the polyurethane and the metal generating high adhesive strength. Polyurethane Rollers appearance bright color, smooth fine colloid surface, and good chemical resistance, therefore suitable for all types of inks and printing methods. For various types of ink, fountain solution, washing solvent component has a special anti-resistance. Polyurethane rubber roller is also suitable for UV inks and coatings Cots Cots, especially for boiling water, diesel fuel, gasoline, oil, kerosene, toluene, alcohol and saline solution have good solvent resistance. But impatience acetone, ethyl acetate and acid and alkali.