Types and Phenomena of Poor Ultraviolet Curing

There are often various solidification phenomena in UV curing technology. The most prone to bad phenomenon is the following. However, sometimes the reason for the poor curing is comprehensive. In other words, sometimes 2 or more solidified phenomenon occurs at the same time in the same product. The specific solution is to contact the technical personnel of the manufacturers of UV resins, UV mercury lamps, product materials, and UV curing machines first, or completely detect the real cause of the phenomenon of solidification. Effective solution. The concept of poor solidification, so -called solidification, means: first, there is no complete solidification state, that is, the state of not hardening; second, the state of excessive solidification, that is, overcured. If the phenomenon of hardening occurs, it will be burned by the cure, or the heat change phenomenon will occur due to the high calorie of the curing bin. If the phenomenon of unseenized phenomenon is because the resin is not completely solidified, the product is sticky, the adhesive force will be significantly reduced, or the resin solution that is not solidified on the surface of the product. 1. Product thermal deformation heat does not have much effect on metal or wood, but the thin plastic series of film or film products is very sensitive to heat. The calories are extremely sensitive, so it can be said that the top priority in the work of solving product thermal deformation in this field. 1) Wave: Thermal deformation is primary stage. 2) Curl: Start partial deformation. 3) Shrinkage: serious local deformation. 4) Carbonization initial stage: all turn yellow, black, and severe thermal becomes serious. 2. Although the adhesive effect seems to have completed the curing process, the adhesion effect between the materials and the coating is not good. It may be scraped with a nail or coin gently, the curing layer will be scraped off, and the cross -cutting test cannot be tested. Mobile parts, LCD display parts or films, COG/BGA and other chip components must be very firm. 3. Swaging, Bulging) The mother material that needs to be painted is like plastic or rubber, which is very sensitive to thermal material. Part of the mother material or resin will swell out due to heating when curing. , It will cause the phenomenon of burning of the mother material or resin. The expansion of the internal and external bending is severe, and the phenomenon of bubbles appears inside, so that the appearance after solidification will not look good. This kind of bad appears in the optical film and mobile phone display flat solidification. 4. Bubbling (Bubbling, Air Bubble) film, high -quality film and other precision films, although the solidification and bonding can be fully completed, if you observe it with a microscope, you will find that there are fine and micro -cracks existing. The reason for it has not yet been concluded, which is also the phenomenon of bad product that is difficult to solve. We believe that this is the result of the crystal of the resin in the horizontal distribution after the resin is solidified. 5. Surface crack film, high -quality film and other precision film. Although the solidification and adhesion can be fully completed, if you observe it with a microscope, you will find that there are fine and micro -cracks. The reason for it has not yet been concluded, which is also the phenomenon of bad product that is difficult to solve. We believe that this is the result of the crystal of the resin in the horizontal distribution after the resin is solidified. 6. The phenomenon of yellowing is a phenomenon that occurs more when solidifying on transparent resin. You can reduce the phenomenon of yellow change from adding yellow changes in the composition of resin to reduce the phenomenon of yellow change. 7. Film non -dry glue ink printing commonly used thin -film non -drying materials are: polyethylene, polypropylene, polyester, polyvinyl chloride, polystyrene, polyolefin, etc. But the difference is that the film is not absorbed. Therefore, the printing of the film does not dry glue mainly uses UV convex marks and UV soft printing. However, in the process of printing and processing, the problem that label printing companies often encounter are the insufficient paste of UV ink on the surface of the film. The solidification has a great impact on the stretch strength. With the increase of the curing of the adhesive, the cross -linked density increases, the average molecular mass of the cross -linking point becomes smaller. If the epoxy and polyurethane acrylics are coordinated, the adhesion will be greatly enhanced.