1. Core definition and functional integration
The definition of 3A technology: 3A anti-explosion film refers to an optical film that integrates three major functions: AG (anti-glare), AR (anti-reflection), and AF (anti-fingerprint). It is widely used in scenarios such as automotive displays, instrument panels, and sunroofs, taking into account both safety protection and visual optimization.
Core functions
Explosion-proof performance: It adopts multi-layer polyester base material (such as PET/TAC). When the glass breaks, the film can firmly adhere to the fragments to prevent splashing and injury, and has high impact resistance.
Optical optimization: The AR layer reduces the reflectivity to below 0.5% through an optical interference structure, enhancing the light transmittance and contrast. The AG layer reduces glare through surface microstructure. The AF layer prevents fingerprint contamination through a hydrophobic and oleophobic coating.
Additional features: High light transmittance (front windshield film ≥60%), heat insulation rate ≥50%, ultraviolet blocking rate ≥98%, wear-resistant and scratch-resistant. Some products support dynamic dimming (such as electrochromic skylight film).
2. Structure and material composition
Typical structure: From top to bottom, it includes a protective film layer (anti-static/clean), an anti-fouling layer (high water drop Angle coating), an AR anti-reflective layer, an AG anti-glare layer, a substrate layer (PET/TAC/SRF), an OCA optical adhesive layer and a release film.
Key materials
Base materials: PET (general-purpose), TAC (high transparency), SRF (weather-resistant). Some high-end products use glass base materials to enhance the texture.
Coating: Silicone oil/fluoroplastic release agent, nano-alumina enhances heat resistance, UV-cured resin improves weather resistance.
Functional layer: The AR layer achieves low reflection through multiple layers of optical interference. The AG layer forms microstructures through embossing or etching. The AF layer is hydrophobic and oleophobic achieved through plasma deposition or electroless coating.
3. Processing technology and technological innovation
Precision coating technology: It uses anilox rollers to transfer the coating resin grid layer and micro-concave coating of silicone release agent. The coating accuracy is ±0.1g/m², and the UV curing energy is ≥300mJ/cm².
Embossing and composite process: A grid texture is formed through an embossing roller, and the surface tension is enhanced by corona treatment. The multi-layer structure is pressurized and compounded by a composite wheel, and then trimmed and wound after cooling.
Quality control: Thickness uniformity deviation ≤±5%, peel force 0.1-2.0N/25mm (light/heavy peel type), temperature resistance: Peel force change rate ≤±20% after 150℃ for 1 hour, wet heat aging resistance: 85℃/85% RH for 500 hours without coating peeling.
4. Application Scenarios and cases
Intelligent cockpit: Applied to in-vehicle displays and instrument panels, it solves the problem of dazzling reflection under strong outdoor light, increases the display contrast by more than three times, and reduces display power consumption.
New energy vehicles: Adapting to the trend of large screens, such as sunroof dimming films (ultra-low square resistance ITO conductive films) and central control screen protective films, taking into account both explosion-proof and energy-saving features.
Special scenarios: Semiconductor process protection, building curtain wall shading and heat insulation. Some products have passed B1 flame retardant certification, meeting fire safety requirements.