The main function of the film surface coating treatment agent is to enhance the comprehensive performance of the film through chemical or physical modification. The specific functions can be summarized as follows:

1.Enhance surface adhesion

Improve the adhesion of ink/adhesive: By increasing the surface energy of the film or introducing polar groups, make the ink, coating or adhesive more likely to wet the surface. For instance, BOPP films can enhance the adhesion of UV ink by through corona treatment or special treatment agents (such as leveling agent).

Alternative to traditional processing techniques: For instance, PET films can be directly treated with corona free treatment agents (containing special functional groups) to form high-adhesion coatings, simplifying the production process

2. Enhance weather resistance and protective performance

Alternative to traditional processing techniques: For instance, PET films can be directly treated with corona free treatment agents (containing special functional groups) to form high-adhesion coatings, simplifying the production process

Corrosion resistance and wear resistance: Metal film treatment agents (such as fluorozirconate-based composite films) enhance corrosion resistance through zirconium formation films; Additives such as nano-titanium dioxide can enhance self-cleaning and antibacterial properties

3. Optimize the surface physical properties

Adjust surface tension and wettability: Increase surface roughness through plasma treatment or chemical etching to improve wettability (such as hydrophilic or hydrophobic function), which is suitable for biomaterials or packaging films

Reduce friction and static electricity: Add lubricants (such as oleamide) to lower the friction coefficient between films, prevent adhesion, and at the same time have an anti-static effect, making it suitable for packaging and electronic insulating materials

4. Achieve special functionalization

Functional coatings: such as anti-fog, anti-ultraviolet (nano zinc oxide), conductive (graphene coating) or flame-retardant coatings, expanding the application of films in electronics, medical and other fields

Biocompatibility improvement: Through enzyme treatment or plasma modification, the film is made suitable for the surface of medical devices or biosensors

5. Environmental Protection and process optimization

Reduce pollution and energy consumption: Phosphorus and nitrogen-free treatment agents (such as Oxsilan silane technology) replace traditional phosphating processes to reduce heavy metal pollution; Water-based treatment agents comply with EU environmental protection standards

Simplify the processing flow: The fast-drying treatment agent (curing within 15 seconds) meets the requirements of assembly line production, such as the application of UV light-cured coatings on PET films

Packaging material: PVC composite film is treated with acrylate treatment agent to prevent plasticizer precipitation while maintaining welding performance.

Electronic devices: Polyimide (PI) film coated with high-temperature resistant primer to enhance insulation and ink adhesion, used as flexible circuit substrate

Automotive industry: Silyl film treatment agents (such as Oxsilan) are used on the surface of galvanized steel to replace the phosphating process and enhance the adhesion of the coating.

Summary

Surface treatment agents endow films with diverse functions through dual mechanisms of physical modification and chemical bonding. Their selection needs to be customized based on the characteristics of the substrate (such as polarity and thermal stability) and the terminal application scenarios (such as weather resistance and electrical conductivity). The future trend will focus on the development of green and environmentally friendly coatings (such as biodegradable treatment agents) and intelligent coatings (self-healing and responsive functions)