Polyva brings you an introduction to the application of water-based polyurethane to PET film processing-technical knowledge

Polyva brings you water-based polyurethane used in PET film processing. Introduction Source: Protective film factory direct sales Release time: 2019-05-04 Hits: 1557 Due to the low surface energy of PET film, the use of PET film is limited, in order to improve the surface of PET film In order to improve the printing adaptability and the bonding force of the vacuum aluminized layer, corona treatment is usually used to increase the surface tension of the film. However, the corona method has problems such as timeliness, especially in a high temperature and high humidity environment, the tension of the film after the corona treatment is easily attenuated. However, the chemical coating method does not have such a problem, so it is favored by the printing industry and the aluminum plating industry. Usually water-based polyurethane emulsions can be used for processing. Water-based polyurethane applications are used for PET coatings. They have excellent adhesion to PET materials. They can be used as PET packaging ink connection adhesives, PET food packaging adhesives, and PET Packing aluminum foil connection adhesive and so on.