Main features of high-quality printing rollers

The rubber roller is an important accessory on the printing machine, which has an important impact on the quality of the printed product. Printing rubber rollers have different functions on different types of printing machines. How to choose high-quality and high-performance printing rubber rollers is of great significance to improve the production efficiency of printing plants, meet various production requirements of customers, and ensure the quality of printing. . At present, many kinds of rubber rollers are used in printing factories in China, and the more common ones are natural rubber rubber rollers, synthetic rubber rubber rollers, etc. Among them, polyurethane cots are widely used in the international printing industry, and have gradually replaced rubber cots such as nitrile cots.

What characteristics should high-quality printing rubber rollers have? Generally speaking, high-grade rubber rollers have the following characteristics:

1. 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 can ensure high-quality printing.

2. It has excellent physical properties, long-term use will not make the rubber roller hard and aging, and it has good tear resistance, good resilience and good wear resistance. Long service life, easy to store, long-term storage does not affect the use effect. Under the unbearable pressure of natural rubber rubber rollers and synthetic rubber rollers, high-speed rotary machines, high temperature and high humidity production environment, it can still operate as usual without influence (the tensile strength and wear resistance of polyurethane rubber rollers are the same as natural rubber rubber. 3 times to 5 times that of rollers. Compression deformation, resilience and wear resistance are better than those of synthetic rubber rubber rollers such as nitrile rubber rollers.

3. The high-grade rubber roller has a bright color 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 the chrome-plated roller can adapt to the high temperature and high humidity environment or the cold and dry climate conditions.

Fourth, the printing rubber roller has a good affinity for water: due to the addition of a special formula to the polyurethane material, the internal structure of the molecule is changed, and the factor with good affinity for water is introduced and increased, which improves the resistance of the material to water. Surface tension and surface water absorption, so the water and alcohol series rubber rollers used for dampening have better effects.

5. The printing rubber roller has excellent chemical properties, suitable for various types of inks and printing methods, and is very suitable for varnishing oil rubber rollers and UV ink rubber rollers. (Especially good solvent resistance to diesel, gasoline, fountain oil, kerosene, saline solution, etc.)

6. High-grade rubber rollers are easy to clean. It is very easy to switch between dark and light inks in production. As the plate roller of some printing presses, it can stick to the paper wool, dust and anti-sticking powder on the printing plate and other miscellaneous characteristics, and does not require frequent loading and unloading cleaning. , to facilitate production.