Hello, everyone, today we and Auvcure Xiaobian to learn ultraviolet [UV curing] fast light curing silk screen sensitive adhesive and sensitive film related knowledge, hope to help you.
UV curing lamp fast curing screen printing plate with sensitive materials, according to its existence of the shape of the sensitive adhesive and sensitive film is some people say film film, film paper. According to the material properties of its composition, there are dichromate system, diazo salt system, ferric salt system, etc., according to its use, there are UV curing lighting solid screen sensitive adhesive, screen sensitive film, sealing adhesive, film hardening agent, film stripping agent, developer and so on.
The basic requirements of screen printing for fast light curing photosensitive materials by UV curing lamps
UV curing light curing screen printing plate requirements for sensitive materials
Good plate making, easy to coat. There is an appropriate photosensitive spectral range, generally appropriate in 340~440nm. High sensitivity, can achieve the purpose of energy saving, fast plate making, good development performance, high resolution, good stability, easy storage, reduce waste, economy, health, five toxins, pollution-free.
The plate film formed by the photosensitive material should adapt to the performance requirements of different ink types, have considerable printing resistance, and can withstand the considerable number of scraping pressure on the blackboard. The combination ability with the screen is good, the printing does not produce the film failure, easy to peel, which is conducive to the regeneration of the screen plate.
The main components of screen printing photosensitive adhesive: The main components of screen printing photosensitive adhesive are film forming agent, photosensitive agent and auxiliary agent
1. Additives sometimes need to add some auxiliary agents to adjust the insufficient ultraviolet light of the main component performance, such as dispersants, colorants, sensitizers, plasticizers, stabilizers, etc.
The principle of photosensitive adhesive:
As a photosensitive material for screen plate making, the most commonly used is to emulsify vinyl acetate in polyvinyl alcohol solution, and then add diazo resin as a washed development photosensitive agent. The formation mechanism of the photosensitive film is shown in the figure. The sensitive film hardens due to exposure and becomes an insoluble version of the film. The role of polyvinyl acetate is to strengthen the adhesion of the wire mesh fibers, and the part of the image that is not exposed at the time of development is washed away with the unhardened polyvinyl alcohol.
2. Film forming agent Film forming agent plays a film forming role and is the main component of the plate film. It determines the adhesion fastness and resistance of the plate film (such as water resistance, solvent resistance, printing resistance, aging resistance, etc.). The commonly used film forming agents for screen printing photosensitive adhesive are water-soluble polymer substances, such as gelatin, protein and PVA(polyvinyl alcohol).
3. Photosensitive agent Photosensitive agent is a compound that can produce photochemical reaction under blue and violet light irradiation and can lead to polymerization or crosslinking of film forming agent. The photosensitive agent determines the properties of the photosensitive adhesive such as speed, resolution and clarity.
Auvcure is specialized in the development and production of various UVLED point light sources, UVLED line light sources, [UVLED surface light sources] and [UV curing equipment] manufacturers, and can provide solutions and customization according to the actual needs of customers. The company has Japanese production technology, products are exported to South Korea, Japan, the United States, Brazil and other places. Welcome friends from all walks of life exchange guidance. If you want to know more about the UV curing machine, welcome to consult customer service online or call the company’s service hotline for consultation, we will be happy to provide you with quality service! Some of the information/pictures in this article are from the Internet, only for the purpose of sharing new information in the industry, not for commercial use. If any rights are involved, please inform us immediately, and we will delete it immediately. Thank you.
