[Global Sticky Hands] This Is the Invisible Factor Affecting the Effect of UVLED Irradiation Effect

Tianhui has encountered many customers in consultation. After the ultraviolet UVLED light source is irradiated, the surface of the glue will still feel sticky. After the glue is under destructive test, it is found that the glue is completely solidified, and all the glue is all all the glue. Has become solid state. Many people may understand that the radiation intensity of UVLED light sources is insufficient based on their own understanding, and the glue salesperson may not be enough based on professional knowledge. Is this really true? Actually not like this. Here we have to know the oxygen blocking! Oxygen closure is also called inhibitory inhibitory. Almost all radiation curing materials radiation and solidification reactions will be affected by oxygen in the air. Because the concentration of oxygen in the surface layer is the highest, the agglomeration of oxygen often causes the lower layer to be solidified, and the surface is not solidified. The test proves that for the varnish, the energy consumed by curing 1um thick coating in the air is more than the 1UM thick coating of 1um thick coating in the coating (5um from the surface). The oxygen bargaining effect not only extends the time of radiation curing, but also may damage the important performance of hardness, abrasion resistance, and injury resistance of the surface layer, such as hardness, abrasion resistance, and injury. The base state of general substances (that is, stable state) is a single -line, but the exception of oxygen molecules, its stable state is a three -line state, and there are two unreachable pairs of electronics in the same direction of spin. Therefore, it can be considered that oxygen molecules are double free radicals. Although the oxygen itself is relatively stable and cannot directly cause acrylic agglomeration at a general temperature, it will contend with the aggregate reaction of the free radicals to consume free radicals, thereby generating oxygen blocking agglomeration. There are many methods for slowing oxygen blocking methods. The physical method is to drive away the oxygen in the system in various ways, so that it cannot be in contact with the coatings and coating film. For example, at the station that is exposed to UVLED, blow the glue area with nitrogen, replace the oxygen molecules on the surface of the glue, and reduce the oxygen blocking gathering as much as possible. The chemical method can add oxygen cleaner such as unusamine, sulfurlol, and pyrumin compounds in the system. These compounds can be used as a lively hydrogen supply body to react with peroxide. Or use low polymers and active diluents with low oxygen sensitivity, such as active diluents and low polymers containing alpinel, propelinel, ether bonds. Excellent glue manufacturers, when producing glue, will consider the problem of oxygen blocking, so as to add appropriate polymers and active diluents to the glue formula. Whether the ultraviolet glue curing technology is successful, on the one hand, it depends on the UVLED light source, and on the other hand, it depends on the formula of ultraviolet glue. When the two are combined, the most cost -effective solution is the application of the plan to industry in the industry.