What are the main characteristics of printing rollers?

Printing rollers have moderate hardness and elasticity, high oil resistance, solvent resistance, wear resistance, and shape stability. Soft rollers are generally made of materials such as SBR, CR, and PU. Today, the editor will take you to understand the main characteristics of printing rollers.
1. The polyurethane rubber roller colloid has sufficient surface viscosity. Therefore, printing rollers have good ink transfer and ink transfer performance in the printing process, and good ink affinity can ensure high-quality printing.
2. Printing rollers have excellent physical properties, and long-term use will not cause the rollers to harden or age. They have good tear resistance, resilience, and excellent wear resistance. Long service life, easy to store, long-term storage does not affect the effectiveness of use. Under the pressure that natural rubber rollers and synthetic rubber rollers cannot withstand, high-speed rotating machines can still operate normally in high-temperature and high humidity production environments without affecting (the tensile strength and wear resistance of polyurethane rubber rollers are 3-5 times that of natural rubber rollers. Compression deformation, resilience, and wear resistance are better than synthetic rubber rollers such as nitrile rubber rollers.
3. The appearance of the rubber roller is bright, the surface of the gel is delicate, and the glue is firmly bonded to the core. The size of the printing roller will not change significantly at different temperatures, and can adapt to high temperature and high humidity environments or cold and dry climate conditions.
4. The printed canvas bed has a good affinity for water. By adding a special formula to polyurethane materials, the internal structure of the molecules has been altered, and factors with good affinity for water have been introduced and increased, thereby improving the material's resistance to surface tension and surface water absorption. Therefore, it is used as a dampening board for a series of water and alcohol rubber rollers with good results.
5. Printing rollers have excellent chemical properties and are suitable for various types of inks and printing methods, making them very suitable for both glossy and UV ink rollers.
6. Rubber rollers are easy to clean. It is easy to convert dark and light ink in production. As the plate roller of some printing machines, it can stick paper wool, dust, anti sticking film powder and other miscellaneous characteristics on the printing plate without frequent loading, unloading and cleaning, which is convenient for production.
The above are the main characteristics of the printing roller. In the offset printing process, the key is to control the balance between the water and ink paths, and the ink balance depends on the key components of the roller and ink roller, whose quality directly affects the product quality.
Editor: Chihiro