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PET Coating film

2021-03-08
In order to improve the surface properties of the PET film, to improve the adaptability of printing 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.

A series of PET chemical coating products have been developed in China: such as coating with water-soluble polymers, it can increase the surface tension of PET film; coating with acrylic emulsion can improve the adaptability of printing (water-soluble inks can be used); Polyurethane aqueous solution coating can strengthen the bonding force between the aluminized layer and the PET base film and increase the thickness of the aluminized layer. In addition, the coating method can also be used to produce high-barrier films and antistatic films.

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