Application of aqueous ink-jet ink in tipping paper digital printing technology

Abstract

The invention provides an application of an aqueous ink-jet ink in a tipping paper digital printing technology, and belongs to the technical field of printing. The novel application of the tipping paper digital printing technology is carried out under the requirements of related quality standards. Through a series of technological improvements on the formula of aqueous ink-jet ink dedicated for tipping paper digital printing, preparation, and printing process, finally two technology namely digital printing and tipping paper production are successfully combined. After detection, the printing layer thickness, glossiness, leveling property, surface tension, adhesive force, and safety of the tipping paper all meet the related quality standards. The tipping performance in the subsequent processing step can also meet the using requirements. The production is quick and flexible. At the same time, the printing quality is stable. The tipple paper will not have quality defects in subsequent processing step. The using requirements of digital printing and tipping paper processing can be satisfied at the same time. The application range of digital printing is enlarged. At the same time, the tipping paper production efficiency and product quality are both improved.

Description

technical field [0001] The invention relates to the technical field of smoking materials, in particular to the application of colored or printed materials on tipping paper for cigarettes. Background technique [0002] Tipping paper is an important material for cigarette production. At present, ink is generally used for surface gravure printing on tipping paper. The ink is supplied to the graphic and non-graphic parts of the gravure through the ink supply device. The ink on the surface of the gravure printing plate is scraped clean, and through the action of printing pressure, the ink in the gravure mesh is transferred to the substrate, thus completing a printing. [0003] Gravure printing technology itself has its own advantages, but due to the characteristics of tipping paper itself, there are the following shortcomings in the production of tipping paper: the printing ink layer is thick, and the ink consumption is relatively large; the printing plate production cycle is lon...

AI Technical Summary

Problems solved by technology

[0003] Gravure printing technology itself has its own advantages, but due to the characteristics of tipping paper itself, there are the following shortcomings in the production of tipping paper: the printing ink layer is thick, and the ink consumption is relatively large; the printing plate production cycle is long and the price is low. Expensive, suitable for mass production, high cost for small batch production, not conducive to the development of new designs and new products; gravure mesh cells are cones, part of the ink can not be transferred, easy to dry, must use ink with high fluidity; printing pressure is not enough It will cause poor ink transfer, missing text patterns, and too much pressure will leave embossed marks on the paper, etc.

[0004] In recent years, the scale of flexographic printing tipping paper has gradually expanded. The flexographic printing water-based ink combined with the resin plate can print small characters, fine and clear lines, smooth and flat. However, due to the small domestic flexographic printing market, some supporting facilities are not complete, and after-sales service Can’t keep up. Although flexo printing equipment has the advantages of simple structure, easy operation, easy cleaning and maintenance, etc., there are not many suppliers of anilox rollers and printing plates, and even fewer suppliers with mature technologies. Relying on imports means high prices and long cycle times. Feedback is inconvenient, which makes it difficult to implement the urgently needed improvement due to lack of hardware. For example, the seamless printing plate for continuous printing is required for tipping paper, but the only material that can make seamless printing plates at present is rubber. It can adapt to solid or simple printing, but it can't adapt to detailed patterns and characters. Although resin plates can be used as seamless printing plates, they are difficult to popularize because of their low service life and high price.

[0005] However, digital printing is another printing method completely different from traditional plate printing. Its fast and flexible characteristics have become advantages. At present, there are few related reports on the products and processes of tipping paper produced by digital printing. There are many reasons, among which One of the important factors is that there is no suitable special ink for digital printing of tipping paper

[0006] The performance of water-based ink is stable, the change of printing hue and effect is small, and the quality of printed products is stable. However, the general water-based ink on the market is mostly used for printing paper or corrugated paper above 100g / ㎡, while tipping paper with a thickness of about 35g / ㎡ has a great influence on ink fineness. , drying speed, pH value and other requirements are high, but there are not many inks that can meet this requirement

[0007] The printing of tipping paper is greatly affected by the environment, and the expansion and contraction of the paper has a great influence on the distance between the graphic and text groups of the unit, which is prone to poor lapping of the cigarette circle; After printing, the processing technology required is quite different. Ordinary digital printing products are basically finished products after printing, and tipping paper needs more processing technology after printing before it can be used as tipping paper, especially tipping paper needs to be used in cigarettes. Cooperate with latex on the machine, and connect with cigarettes and mouthpieces at a certain drying temperature and machine speed. This process involves the glue-absorbing properties of the tipping paper.

Due to its water-soluble characteristics, the conventional water-based ink makes it easy for the tipping paper to change the performance of the paper during the repeated process of "water absorption-drying". If the tipping paper absorbs water too quickly during the splicing process , coupled with the extremely high fineness of the water-based ink, the surface of the tipping paper is very smooth, which reduces the rubbing friction and easily causes quality defects such as cigarette flashing and air leakage

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