After the PET film is dry-laminated, why does the ink always transfer to the inner film? -Film supplier
The reason why the ink transfer occurs after the dry composite of the PET film. Because the 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. Solution: Two points should be paid attention to during PET film printing and dry lamination: 1. The amount of glue applied during lamination must be small, and the solvent of the lamination glue should evaporate as much as possible when passing through the drying tunnel. (Always check whether the exhaust system of the drying tunnel is The temperature of the composite hot drum of the laminating machine should not be lower than 70℃. 2. The ink should be as little as possible, and the ink should be dry (dry) to prevent the phenomenon of false drying of the ink (especially the use of chlorinated polypropylene composite plastic When printing with 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 (printing It’s better to rewind and blow air after it’s been stored. Beware of the adhesion of the printed film.) It is a professional manufacturer of PET film with multiple functions, such as transparent PET film, milky white PET film, release PET film, PET motor film, etc. With a wide range of products, affordable prices, and environmental protection, we are guided by the service tenet of excellence in production, honesty and trustworthiness in distribution, enthusiastic and thoughtful service, and the spirit of assisting partners to achieve their own careers to provide customers with excellent quality and service. Interested Welcome to inquire!