Water-based PET Primer Emulsion Improves Ink Adhesion

Water-based PET film primer emulsion is a coating material used to improve ink adhesion, especially for PET (polyethylene terephthalate) film surface. Here is detailed information about the emulsion and how it increases ink adhesion:

1. The role of water-based PET film primer emulsion
Improve adhesion: The surface of PET film is smooth and chemically inert, and it is difficult for ink to adhere directly. The primer emulsion can form a coating with good adhesion on the PET surface, enhancing the bonding between the ink and the film.
Improve wettability: The primer emulsion can improve the surface energy of the PET film, making it easier to wet, thereby promoting uniform spreading and adhesion of the ink.
Enhance printing effect: By improving adhesion, the primer emulsion can reduce problems such as ink shedding and bubbling during printing, and improve printing quality and durability.

2. Composition of primer emulsion

Water-based resin: Usually acrylic resin, polyurethane resin, etc. are used, which have good adhesion and flexibility.

Cross-linking agent: used to enhance the water resistance and wear resistance of the coating.

Wetting agent: Improve the spreadability of the emulsion on the PET surface.

Stabilizer: Ensure the stability of the emulsion during storage and use.

3. Application method

Surface treatment: Before applying the primer emulsion, the PET film usually needs to be corona treated or plasma treated to further improve the surface energy.

Coating method: The primer emulsion can be evenly applied to the surface of the PET film by roller coating, spraying or dipping.
Drying and curing: After coating, it needs to go through a proper drying and curing process, usually hot air drying or ultraviolet curing.

4. Advantages

Environmental protection: Water-based emulsions do not contain organic solvents and meet environmental protection requirements.

Safety: Low VOC (volatile organic compound) emissions, safer to use.

Compatibility: Applicable to a variety of ink systems, such as water-based inks, UV inks, etc.

5. Precautions

Coating uniformity: Ensure that the primer emulsion is evenly coated to avoid uneven thickness.

Drying conditions: Control the drying temperature and time to avoid over-drying or insufficient drying.

Storage conditions: Water-based emulsions should be stored in a cool and dry place to avoid freezing and high temperatures.

By using water-based PET film primer emulsion, the adhesion of ink on PET film can be significantly improved, thereby improving the quality and durability of printed products.