Rubber roller characteristics

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 machines. How to choose high-quality and high-performance printing rollers is of great significance for improving the production efficiency of printing factories, meeting various production requirements of customers and ensuring the quality of printing. With the addition of China's "WTO", the overall level of the people has increased, and the requirements for printing quality have been continuously improved. The number of high-end and high-speed printing presses has also increased. The quality of printing rollers that the market needs to match with printing presses is also getting higher. . It can be said that high-grade printing rubber rollers are equipped with high-grade printing machinery in order to have good printing products. At present, a variety of rubber rollers are used in Chinese printing factories. The most common ones are natural rubber rubber rollers, synthetic rubber rubber rollers, etc. The polymer rubber rollers with excellent performance are gradually accepted by enterprises with high-quality printing machines, and will be widely used in the future. It is widely used by printing manufacturers. Among them, polyurethane printing rolls are commonly used in the international printing industry, and rubber rubber rolls (such as products such as nitrile rubber rolls) have been gradually replaced.

Polyurethane rubber rollers for medium and high-end printing presses should have the following characteristics:

1. The rubber roller looks bright and bright from the appearance, the surface of the gel is fine and smooth, and the glue and the core are firmly bonded. The size of the rubber roller does not change greatly at different temperatures, and it can adapt to high temperature and high humidity environment or cold and dry weather conditions.

2. Polyurethane rubber roller colloid has sufficient surface viscosity. Therefore, the rubber roller has good ink transfer and ink discharge performance in the printing process, and good ink affinity can ensure high quality printing.

3. Excellent chemical properties, suitable for various types of inks and printing methods, very suitable for UV type ink rollers and varnish rubber rollers. (especially good solvent resistance to diesel, gasoline, dampening oil, kerosene, salt water, etc.)

4. Excellent physical properties, long-term use will not make the rubber roller hard and aging, and tear resistance, good resilience and excellent wear resistance. Long service life, easy to store, long-term storage does not affect the use of results. In the unbearable pressure of natural rubber rubber roller and synthetic rubber roller, high-speed rotary machine, high-temperature, high-humidity production environment can also operate as usual without impact (polyurethane rubber roller's tensile strength, wear resistance is natural rubber glue The roller is 3 times to 5 times. The compression set is permanent, and the resilience and wear resistance are better than those of synthetic rubber rollers (such as nitrile rubber rollers).

6. Because special formula is added to the polyurethane material, the internal structure of the molecule is changed, and the strong gene with good affinity to water is introduced and increased, thereby improving the surface tension and surface water absorption of the material against water. Therefore, it is used as a dampening water and an alcohol series rubber roller with excellent effect.

5. The rubber roller is easy to clean. It is very easy to convert dark and light inks in production. As a plate roller for some printing presses, it can stick to the characteristics of paper wool, dust and anti-sticking powder on the printing plate, and does not require frequent loading and unloading cleaning. Easy to produce.