The rubber roller is an important accessory on the printing press and has an important influence on the quality of the printed product. Rubber rollers have different functions on different types of printing presses. How to choose high-quality and high-performance printing rubber rollers is of great significance for improving the production efficiency of the printing plant, meeting various production requirements of customers, and ensuring the quality of printing. With China's entry into the "WTO", the overall level of the people has been strengthened, the requirements for printing quality have been continuously improved, the number of high-end and high-speed printing machines has also increased, and the quality of the printing rollers required by the market for printing machines has also become higher and higher. . It can be said that high-end printing rubber rollers are equipped with high-end printing machinery in order to have good printed products. At present, a variety of rubber rollers are used in printing plants in China. The more common ones are natural rubber rubber rollers, synthetic rubber rubber rollers, etc. Polymer rollers with excellent performance are gradually accepted by companies with high-quality printing machines, and will be used by many in the future. It is widely used by printing manufacturers. Among them, polyurethane rubber rollers are commonly used in the international printing industry, and have gradually replaced rubber rubber rollers (such as nitrile rubber rollers and other products).
The polyurethane rubber roller used in high-end printing machine should have the following characteristics:
1. The rubber roller is bright in appearance, the surface of the colloid is fine and smooth, and the glue and the core are firmly bonded. The size of the rubber roller will not change greatly at different temperatures, and can adapt to high temperature and high humidity environment or severe cold and dry climate conditions.
2. Polyurethane rubber roller colloid has sufficient surface viscosity. Therefore, the rubber roller has good ink transfer and inking performance in the printing process, and good ink affinity performance can ensure high-quality printing.
3. It has excellent chemical properties, suitable for various types of inks and printing methods, and is very suitable for UV ink rollers and varnish rubber rollers. (In particular, it has good solvent resistance to diesel, gasoline, dampening oil, kerosene, saline solution, etc.)
4. It has excellent physical properties, long-term use will not make the rubber roller hard, aging, and tear resistance, good resilience, excellent wear resistance. Long service life, easy to store, long-term storage does not affect the use effect. Natural rubber rubber rollers and synthetic rubber rollers can bear the unbearable pressure, high-speed rotary machine, high temperature and high humidity production environment can still operate as usual (the tensile strength and wear resistance of polyurethane rubber rollers are natural rubber rubber) 3 times to 5 times of the roller. Compression permanent deformation, resilience and wear resistance are better than synthetic rubber rubber rollers (such as nitrile rubber rollers, etc.).
5. The rubber roller is easy to clean. It is very easy to convert the dark and light color inks in production. As the plate roller of some printing machines, it can stick the paper wool, dust and anti-sticking powder spraying and other miscellaneous characteristics on the printing plate, without frequent loading and unloading cleaning To facilitate production.
6. Because of the special formula added to the polyurethane material, the internal structure of the molecule is changed, and the extremely strong gene with good affinity for water is introduced and added, thus improving the surface tension resistance and surface water absorption of the material to water. Therefore, it is used as dampening water and alcohol series rubber roller, which has an excellent effect.
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