Hydrophobic material and application thereof in preparation of offset print printing plates

Abstract

The invention discloses a hydrophobic material and an application thereof in preparation of offset print printing plates, and belongs to the technical field of preparation of printing plates. The hydrophobic material comprises 0-30wt% of hydrophobic resin, 10-40wt% of film forming resin, 0.001-1wt% of a crosslinking agent, 0.001-5wt% of a surfactant, 0.001-5wt% of an assistant and the balance of a solvent. The hydrophobic material has the function of rejecting waterborne printing ink and excellent performance of preventing chemical solvents and resisting wear. According to the material applied to preparation of offset print printing plates, the plate base used is not electrochemically treated. The UV (Ultraviolet) curing bottom coating can better bind the metal substrate with a hydrophobic coating and no VOC (Volatile Organic Compound) is discharged. The hydrophobic coating can be used to construct a nano- or micro-structure and reject waterborne printing ink, and has better wear resistance. The plate provided by the invention avoids pollution of waste acids and waste alkalis caused by electrochemical treatment. The plate prepared by way of printing is free from light, and chemical treatment processes such as development and fixation are avoided. During printing, waterborne printing ink can be used to realize image-text transfer.

Description

technical field [0001] The invention belongs to the technical field of printing plate preparation, and in particular relates to a hydrophobic material and its application in the preparation of offset printing plate materials. Background technique [0002] Offset printing technology is an indirect printing method that uses the graphics on the printing plate to be printed on the intermediate carrier (blanket cylinder) first, and then transferred to the substrate. Due to the advantages of fast printing speed, relatively stable printing quality, and short printing cycle, books, newspapers, and a considerable part of commercial printing are all using offset printing. Offset printing plates are widely used printing plates at home and abroad. However, in order to improve the printing durability and resolution of the aluminum plate base in traditional plate base production, the aluminum plate is usually anodized and grained (see CN85100875). However, during anodic oxidation, a lar...

AI Technical Summary

Problems solved by technology

But gravure and flexo plate making is expensive

It is imperative to introduce water-based ink into the low-cost offset printing field, but the current offset printing method that uses water-ink balanced plates for printing cannot use water-based inks