PET film micro-gravure roll coating and strip process technology-technical knowledge
PET film micro-gravure roll coating and strip process technology source: protective film factory direct release time: 2019-11-07 clicks: 1675 different from ordinary protective film or tape, the optical film must be uniform in thickness, and the surface must be dust-free and less crystalline Point, this puts forward higher requirements on coating technology, requiring a more uniform film thickness. Therefore, the precision coating process has gradually developed and been continuously improved. Optical film coatings are traditionally prepared by vacuum evaporation, chemical deposition, plasma polymerization and other methods. These methods are difficult to achieve large-scale production of roll film substrates. In modern coating processes, the commonly used coating methods include dip coating, Roll coating, gradient extrusion coating, curtain coating, etc. These coating methods are suitable for materials with different properties and coating thickness, and have their own advantages and disadvantages. For example, the coating amount of dip coating is not easy to control, which 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 more affected by the characteristics of the material. Large, suitable for a narrow range of material viscosity; although gradient extrusion coating is easy to control the coating amount, it is suitable for a narrow range of material viscosity, and the coating amount is too small to be easy to coat, and it cannot be coated to the edge, resulting in a waste of substrate ; Curtain drop coating is a predictive coating method, it is easy to operate, the longitudinal and transverse coating thickness is very uniform, the coating has no scratches, streaks, orange peel, but the drop curtain is easily affected by factors such as vehicle speed Therefore, the stability of the curtain falling is a big problem. 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!