What are the main reasons for rainbow patterns? -technical knowledge

What are the main reasons for rainbow patterns? Source: Protective film factory direct sales Release time: 2019-07-25 Click: 766 The main reason for the rainbow pattern: 1. The root cause of the rainbow pattern is due to the uneven thickness of the coating layer. When light passes through, it reflects and diffracts to form a rainbow Effect. Since the current domestic film manufacturing process often adopts the production method of multi-layer co-extrusion, the layer spacing will be biased, so the film itself will also have rainbow patterns; 2. The technical problems of the coating equipment itself will cause uneven coating thickness. Rainbow pattern; 3. The choice of coating liquid solvent. If the coating liquid is composed of multiple solvents, factors such as the solubility parameter between the solvents and the volatilization speed need to be considered. If the solvent is not selected properly, rainbow patterns will also occur. 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!