Thermal curing and UV curing technology of PET optical film coating-technical knowledge

Thermal curing and UV curing technology of PET optical film coating Source: Protective film factory direct sales Release time: 2019-11-05 Click: 1606 The preparation of optical film, the curing method can be divided into thermal curing and UV curing. Thermal curing is a more traditional and common curing method. Generally speaking, thermal curing is not easy to cause serious volume shrinkage due to curling, which will generate shrinkage stress and affect the strength of the coating. However, thermal curing requires a long period of time and labor intensity, and it is also prone to environmental pollution problems for solvent-based coating liquids. The UV curing is summarized as having the characteristics of '5EThe disadvantages of UV curing are: the curing process of free radical photocurable coatings is easily inhibited by oxygen, and the surface curing is not good; the ultraviolet light band is different, and the depth of irradiation is different, which will make the inside of the coating not fully cured, thereby making the coating The bonding strength at the interface with the substrate is insufficient. At this stage, some people often use a dual curing method combining heat curing and light curing, that is, light curing is used to quickly set the system or achieve 'surface dryness, Thereby expanding the application range of the light curing system; for solvent-based coating fluids, you can also place it at high or medium temperature for a while to volatilize the solvent, and then place it under ultraviolet light to avoid solvent residue on the coating. In the system, the bonding strength or other properties will be affected, and the curing time will be shortened, and the efficiency will be improved. Foshan Bowei Environmental Protection Material Co., Ltd. is an electronic material supplier with 20 years of experience. It can produce PET film with various functions, such as: sub-(matte) PET film, flame-retardant (fire-resistant) PET film, inkjet printing Film, anti-static PET film, anti-fog PET film, anti-UV PET film, non-shrinking PET film, PET release film, optical PET film, etc. Interested parties welcome to inquire!