How To Restore The Grease Sensitivity Of The Rubber Roller?

The transfer roller, the transfer roller and the offset roller which are used for carrying, transferring and transferring in the offset printing machine are rubber rollers, and these rubber rollers often cooperate with the inkjet rollers and heavy rollers of different materials to function together. The blanket is used to clean the mixture of reducing agent and gasoline, and is cleaned by different cleaning methods. This method plays an important role in saving cleaning materials, stabilizing the performance of the rubber roller, printing quality and reducing the occurrence of printing failure.

In general, the higher the fat-sensitive performance of the rubber roller, the better the adhesion and transfer properties of the ink on it. After a long period of use, the rubber roller tends to cause deterioration of the sensory performance due to the aging film on the surface, which is not conducive to the normal transfer of the ink, especially the common type ink which is easy to be emulsified and some special inks which are easy to absorb water and easily change color. . In this case, not only is it easy to cause serious emulsification of the ink, but also the phenomenon of ink accumulation of the rubber roller is likely to occur, resulting in an increase in the dot size of the printed product and the falsification of the text.

In order to avoid the above-mentioned undesirable phenomena, we usually use blanket cleaning and reducing agent treatment to restore the good grease sensitivity of the rubber roller. Since the blanket cleaning and reducing agent volatilizes quickly, uneven coating, excessive expansion of the rubber roller and recovery of the rubber roller often occur, which affects its stable use performance. In response to this situation, we have adopted the following method.

If the surface of the rubber roller is lighter, first disassemble the rubber roller and place it on the ink roller holder, take a plastic container or glass container, inject a certain amount of gasoline inward, and then clean the reducing agent with a blanket to 1: The ratio of 20 is injected into the gasoline and the mixture is stirred (the amount of the mixture should be determined according to the degree of aging of the rubber roller and its specific requirements). Then, the mixture is immersed with a cleaning device or gauze and the surface of the rubber roller is quickly wiped once, and the entire surface is sufficiently wetted, and the mixture is thoroughly washed after the aging film of the rubber roller is relieved. In order to ensure good cleaning and recovery performance, it is advisable to scrub from one end of the rubber roller to the other end during the cleaning process, and to continuously and evenly rotate the rubber roller so that the surface of the rubber roller is restored. If it is cleaned once, the recovery effect is not good enough, and the second and third cleanings can be performed until a good cleaning effect is achieved.