Coated rubber compound of universal printing rubber roll and preparation method thereof

Abstract

The invention discloses a coated rubber compound of a universal printing rubber roll. The coated rubber compound is prepared from the following raw materials in parts by weight: 170 to 200 parts of natural rubber, 10 to 13 parts of acetyl tributyl citrate, 1 to 2 parts of polybenzimidazole, 0.1 to 0.3 part of trimethylolpropane, 2 to 4 parts of dodecyl mercaptan, 5 to 7 parts of polytetrafluoroethylene wax, 0.6 to 1 part of hexamethyl phosphoryl triamide, 1 to 2 parts of dodecyl trimethyl ammonium chloride, 1 to 2 parts of accelerators CA, 24 to 30 parts of diatomite, 2 to 3 parts of antioxidants AW, 2 to 3 parts of vulcanizers PM, and 6 to 9 parts of performance additives. According to the invention, zirconium alcohol liquid and triallyl isocyanurate are crosslinked to obtain liquid rubber with higher viscosity, and then the liquid rubber is dispersed by using inositol hexaphosphate to obtain an additive with better dispersion, and the additive can be added to raw materials, so that the Mooney viscosity of the rubber compound can be improved, a rubber strip extruded while winding forming by extruding is large in stiffness, good in continuity and tight in winding rubber coating, a well formed roller blank is not easy to drop while stopping, and the finished product is better in quality.

Description

technical field [0001] The invention mainly relates to the field of printing, in particular to a coating rubber material for a universal printing rubber roller and a preparation method thereof. Background technique [0002] At present, the problems that printing rubber rollers are prone to occur are as follows: [0003] 1. Thermal aging [0004] The heating of the rubber roller will accelerate the desulfurization, resulting in thermal aging, making the surface sticky and soft, and even cracks appear in the shape of orange lines. At this time, the rubber roller can only be replaced; [0005] 2. colloid off block [0006] The ink dries early during the transfer process on the surface of the colloid, and the dried ink film decreases in ductility. During the rolling process, the surface of the colloid will be destroyed along with the cracking of the ink film, resulting in colloidal blockage. The main reason for the early drying of the ink is that the desiccant is added to t...

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a general-purpose coating rubber material for printing rubber rollers and its preparation method in order to make up for the problems of low strength, ink resistance, and poor machining and polishing performance of traditional NBR printing rubber rollers.