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What should be paid attention to when printing and dry lamination of PET film-film supplier

by:POLYVA     2021-11-17
PET film is a polar film with a surface tension of 45-50 dyn without treatment. It is also a film with good firmness no matter what type of plastic ink is printed on. However, after the two-component polyurethane glue is applied to dry composite with other films, especially after PE film is composited, sometimes the printing ink layer is glued from the PET film and delamination occurs (composite thicker PE Deinking of the film is even worse). That is, the printing ink layer on the PET film, after being compounded, is partially or completely transferred to the inner film. So, what is the reason for this? Is there any way to avoid it? Since PET film has excellent barrier properties and strong anti-leakage properties, it is difficult for the solvent to penetrate, and the solvent absorption of the ink is relatively poor. The binder (resin) of the plastic surface printing ink has a good affinity with the PET film, so printing on the PET film is stronger than the printing ink in the plastic composite. In fact, the ink layer transfer of the printed PET film after compounding has nothing to do with the use of surface printing ink. Instead, the use of composite back printing ink is more prone to ink transfer. Pay attention to PET film printing and dry lamination: 1. Use as little ink as possible, and the ink should be dry (dry) to prevent false drying of the ink (especially when printing with chlorinated polypropylene composite plastic ink) . If the printing speed of the printer cannot be turned on, and the effect of the drying box is poor, you can rewind the printed matter once, and blow air or leave it for some time during rewinding, and then recombine after the ink hardens. Good to rewind and blow air, beware of printing film adhesion). 2. The amount of glue applied during the compounding must be small, and the solvent of the compound glue must be evaporated as much as possible when passing through the drying tunnel (check whether the exhaust system of the drying tunnel is unblocked, and the compound hot drum temperature of the compound machine should not be lower than 70 ℃. Is a company specializing in the production of PET film with multiple functions, such as: transparent PET film, milky white PET film, release PET film, supply of PET motor film, etc.. There are a wide range of products, affordable, technological and environmentally friendly. We strive for excellence in production and honesty in distribution The service tenet of trustworthiness, warm and thoughtful service and the spirit of assisting partners to achieve their own careers and to provide customers with excellent quality and service. Interested parties welcome to inquire!
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