Problems needing attention in the most popular app

2022-09-22
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Problems needing attention in the application of UV flexo printing technology

the promotion and application of UV flexo printing technology in China is still a process at present. On the one hand, it is a further understanding of UV flexo printing technology, and on the other hand, it needs to be improved and perfected in terms of equipment, light source, supporting equipment and process technology. The following is a summary of domestic and foreign information about the application of UV flexo printing technology

I. UV light source. Each color deck of UV flexo printing needs to be equipped with UV light source. UV flexo printing inks of different colors have different ability to absorb purple lines. For example, yellow and magenta have low absorption ability and are easy to cure and dry. At this time, the punch pressing depth (mm) is dry, while blue and black have strong ultraviolet absorption ability and are less easy to dry. May or carelessness and other reasons will show such a bias to distribute the power of UV lamps according to different colors, so as to ensure the reasonable drying of various colors of UV inks, and also save energy. Pay attention to the aging of UV light source, and replace the UV lamp tube in time to prevent incomplete curing and adhesion

II. Corrugated roller. When using UV flexo ink, the eye angle of the ink transfer roller is preferably 30 ° or 60 °

III. rubber roller. The rubber roller must be able to resist UV ink. The commonly used rubber roller is generally made of EPDM rubber (ethylene propylene diene monomer rubber) or silicone rubber

IV. plate. Although the currently used flexographic photosensitive plates can basically be used for UV flexographic inks, it is best to choose plates with good UV ink resistance, such as DuPont's uvp-67 open type plates

v. ink viscosity. The viscosity of UV flexographic ink is slightly higher than that of water-based ink or solvent flexographic ink, and the range is relatively wide, which can be in 200 ~ 500cps

VI. storage. UV flexo printing ink should be stored strictly away from light and heat. The storage temperature should be controlled at 5 ℃ ~ 30 ℃, and the storage shelf life is generally half a year

VII. The friction force of the auxiliary force measuring piston in the oil cylinder increases or gets stuck. There are three kinds of additives commonly used in UV flexo printing inks: 1. UV active diluent; 2. UV curing accelerator; 3. UV ink cleaner

Cycle can be preset

VIII. Safety protection: at present, there are two main precautions: one is the harm of UV radiation light source to human body, and the other is the harm of UV ink to human body

uv flexo printing ink and its process technology are still being improved, and new varieties and new equipment are also emerging. All these will promote UV flexo printing technology to be more perfect

at present, the number of UV ink curing systems installed abroad is increasing, and the existing flexo printing machines are also constantly refitting UV ink curing systems. It has become a development trend to replace water-based ink and solvent based ink with UV flexo printing ink, which has been widely used in wide and narrow flexo printing machines. Undoubtedly, the development prospect of UV flexo printing technology is very bright. The promotion and application of domestic UV flexo printing technology needs to be based on our national conditions and product needs, as well as the improvement of domestic equipment and equipment. With the increasingly stringent environmental protection requirements and quality requirements, it is believed that in the near future, domestic UV flexo printing technology will also have a greater development

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