In inkjet plate-making technology, through the way of printing ink deposition on the surface plate, and did not print area form affinity, shading sex differences in physical structure or surface, achieve enough contrast, get it

by:Arojet     2021-05-05
Reflect the graphic information printed version. Inkjet plate-making ink is the key to realize graphic transfer printing material, its functional properties to ensure the precision of plate and good printing eligibility. According to the report, the performance of different ink with the corresponding plate, which can realize offset printing, flexo printing, screen printing and so on a variety of inkjet plate-making printing way. In the flat convex concave hole four printing mode, use for common offset lithography technology, inkjet plate-making also first arose in the offset printing technology. Emergence of inkjet printing film at the turn of the century and inkjet printing PS version of the technology, are used as shading layer, will ink instead of film making, belongs to the indirect inkjet plate-making technology. This method can solve the traditional PS version in use, the cost of the film and pollution problems, but not fundamentally solve the follow-up plate exposure, development and pollution. Inkjet plate-making technology has now developed into direct inkjet plate-making, oil wet ink to print on the plate of hydrophilic form plate, ink used as affinity of important functional materials. Common offset printing plate making ink types mainly include: water, weak solvent and UV type of ink. Relative to the type of UV ink, water-based and weak solvent ink on the plate making precision and printing eligibility is more outstanding. Inkjet plate-making technology, as a kind of environmentally friendly ink environmental protection requirements is extremely high, so it is the mainstream of development direction to water-based ink. As key materials in the inkjet plate-making technology, the ink in the offset printing technology, in order to achieve good performance and plate printing eligibility, printing imaging system must meet the following conditions: its material, must be compatible with nozzle, and nozzle material compatibility, including ink ink printing fluency in the nozzle and the stability of the ink; Second, plate-making ink must be controlled in the plate surface spreading, forming information on high quality, and meet the accuracy requirement of process; Third, according to the requirement of the offset printing ink balance, plate-making ink after curing, must have good affinity for printing ink, printing eligibility requirements. Flexo printing technology has been increasingly concerned due to its environmental advantages, as the plate to achieve localization, plate price also more populist, its application in a growth trend. But soft printed still belongs to the manufacturing methods of reducing material type, with the rapid development of 3 d printing technology at present, some people use the light curing material system and the 3 d printing technology, to achieve more save to add material type soft printed version of the plan. Inkjet plate-making technology more mentioned in the screen printing plate making, the main technical solution there are two types: one is to use ink to print shading layer, still need to be exposed; Tension is another innovative put forward good blank screen edition print directly on the Yin figure, the UV curing ink making screen printing ink blocking layer, and can be formed by multiple print different barrier layer thickness. Inkjet plate-making technology is a good method to solve the problem of screen plate making pollution, but it is still need further development. Offset printing ink jet plate in offset printing ink jet plate system, according to the principle of water is different, can be divided into sand plate mesh plate and sand mesh plate and two categories, among them, the sand mesh plate containing the bare plate and coating plate two branches of technology. As the name implies, sand yard is still using sand plate microstructure of good hydrophilic as a graphic area use; Avoid sand mesh plate is using special hydrophilic functional materials as the graphic section, do not need to sand production orders, electrolysis, oxidation, so you can choose aluminum or other materials other than aluminum version as a base, more environmental protection and cost advantage. Sand mesh plate can be divided into the uncoated bare plate and coating materials. Bare sand plate mesh structure is special, the sand tunnel with longitudinal permeability, to quickly absorb ink, and fixed drops shape, reduce the diffusion and increase resistance to seal force; Coating plate is in sand coated on the surface of the ink receiving layer, is used to regulate the invasive of ink and plate interface and adhesion force, division way has launched the technical direction of complete sets of products, and recognised by the industry. Learn tiger door and others a super hydrophobic - in public Super hydrophilic conversion coating, this coating containing adhesives, fillers, and mixed solvent. Adhesives with ptfe wax, filler used, fluorinated carbon nanotubes using acetone and ethyl acetate mixed solvent. The coating has change with spraying method make the super hydrophobic into super hydrophilic special performance. Avoid sand mesh plate is in the base material surface coating layer, in use process, the hydrophilic coating instead of sand mesh microporous absorbent to form a uniform water film. In the process of plate making, need to regulate and control the ink in the hydrophilic adhesive on the surface of the plate, invasive, fast drying, and other issues. Hydrophilic sand free mesh plate big technology obstacle lies in the blank part will have very good abrasion resistance, scratch resistance, hydrophilicity, and water retention, but can not be run version of dissolving. Hydrophilic coating can use organic matter, inorganic matter or a mixture of organic and inorganic coatings. Super hydrophilic coating has a lot of research results, but rarely can stable mass production also. Because of the way the inkjet provides a flexible pattern realization means of freedom, and makes the plate material can no longer confined to the photosensitive material system, so in the future in the field of plate-making technology and materials will be more imagination and innovation opportunities.
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