Do you know the coating process technology of optical film? -technical knowledge

by:POLYVA     2021-12-25
Do you know the coating process technology of optical film? Source: Protective film factory direct sales Release time: 2019-06-19 Hits: 2263 Optical film is different from ordinary protective film or tape. It has uniform thickness, dust-free surface and less crystal points, which proposes a better coating technology. High requirements require a more uniform film thickness. Then what are the technologies of the optical film coating process? Let the polyva material professional sub-(matte) PET film and optical PET film with 20 years of experience in electronic materials suppliers explain to you: Optical film coating traditionally uses vacuum evaporation, chemical It is difficult to realize the large-scale production of roll film substrates by deposition, plasma polymerization and other methods. In modern coating processes, the commonly used coating methods include dip coating, roll coating, gradient extrusion coating, and drop coating. Curtain coating, etc. These coating methods are suitable for materials with different properties and coating thickness, and have their own advantages and disadvantages. The coating amount of dip coating is not easy to control, and is greatly affected by the characteristics and temperature of the material; the thickness of the coating layer coated by roller coating is easy to control, the coating amount is easier to control, and the uniformity is better, but it is greatly affected by the characteristics of the material , The viscosity range of the suitable material is narrow; although the coating amount of the slope flow extrusion coating is easy to control, the viscosity range of the suitable material is narrow, the coating amount is too small, and it is not easy to coat, and it cannot be coated to the edge, resulting in waste of the substrate; Curtain drop coating is a predictive coating method. It is easy to operate, and the thickness of the longitudinal and transverse coatings is very uniform. The coating has no scratches, streaks, or orange peel, but the curtain drop is easily affected by factors such as vehicle speed. Therefore, stabilizing the falling curtain is a big problem.
Custom message
Chat Online 编辑模式下无法使用
Chat Online inputting...