The core material system is compatible with its characteristics
Acid and alkali resistant substrates and coatings
T-7133 resin
Three-functional aliphatic polyurethane acrylate, with a glass transition temperature of up to 80℃, features high hardness and excellent chemical resistance after curing. It can withstand long-term immersion in acidic, alkaline environments and alcohol mixtures, and is suitable for protective coatings on glass, ceramic, metal and PET/PMMA substrates.
Fluorine-containing polyimide film layer
By combining the vinyl siloxane layer with the hydrophobic layer, an acid and alkali resistance barrier is formed. The low surface tension characteristic of fluorine and silicon materials can effectively prevent the penetration of corrosive media and simultaneously enhance the anti-sticking performance.
PMMA materials: such as Arkema V825-HID, are resistant to acids and alkalis, scratch-resistant, UV-resistant, and have high light transmittance. They are suitable for the protection of optical devices, outdoor billboards, and automotive parts.
Uv-resistant functional layer
Add UV absorbers or use anti-UV resins (such as T-7133) to block UVA/UVB radiation and prevent the substrate from aging, fading or cracking. For instance, the stickers for electric vehicles remain bright in color after being exposed to the sun through an anti-UV coating, without yellowing or curling at the edges.
Anti-sticking and de-sticking design
The UV anti-adhesion adhesive layer maintains high adhesion (such as 1800gf/25mm) before ultraviolet light exposure, but its adhesion drops sharply (such as 20gf/25mm) after exposure, achieving residue-free peeling. The design of the release film layer and the wavy pressure-sensitive adhesive layer enhances the bonding stability and the ease of peeling.
2. Processing technology and technological innovation
Composite structure process
Typical structures include PO substrate layer, UV anti-sticking adhesive layer, release film layer, pressure-sensitive adhesive layer, vinyl siloxane layer, fluorine-containing polyimide film layer and hydrophobic layer. Multi-layer lamination is achieved through processes such as coating, drying, winding, and slitting. For instance, the acid and alkali resistant UV anti-sticking protective film combines PO base material (with a thickness of 45-90μm) and UV anti-sticking adhesive layer (with a thickness of 12-25μm), and is designed with grooves and mesh holes to enhance adhesion and breathability.
The acid and alkali resistant UV anti-viscosity composition is prepared by mixing polyacrylate pressure-sensitive adhesive, epoxy-modified acrylate, polyurethane acrylate, adding photoinitiator, curing agent and defoamer, and then through steps such as light-blocking stirring and static defoaming to ensure stability and low yellowing.
Precision coating and curing
The uniform coating of the resin layer is achieved by using anilox roller transfer coating and micro-concave coating technology. The UV curing energy is ≥300mJ/cm², ensuring the density of the coating and the conversion rate of double bonds. For instance, T-7133 resin achieves a metallization effect in glass coating through a vacuum coating process while maintaining high adhesion.
The drying process is temperature-controlled by zones. The low temperature in the front section extends the constant-rate drying time, while the high temperature in the back section accelerates solvent diffusion, avoiding the risks of bubbling and fire.
3. Application scenarios and typical cases
Electronic Manufacturing and Precision Machining
It is used for temporary protection of circuit boards, protection of transparent conductive films (such as ITO glass), fixation of micro-components and packaging of liquid crystal modules, to prevent damage from solder slag, chemical reagents or mechanical substances. For instance, when semiconductor wafers are cut, they are fixed with UV anti-sticking protective films, and after processing, they are peeled off under ultraviolet light without leaving any residue.
Its flexibility, weather resistance and insulation properties are utilized in scenarios such as photovoltaic module bonding and optical fiber encapsulation, making it suitable for high-temperature and high-humidity environments.
Automotive and construction fields:
The full-body stickers of the electric vehicle are made of anti-UV and anti-sticking film, which can cover scratches while also providing sun protection and water resistance. After two weeks of exposure to the sun in Guangzhou, there is no color fading. Car sunroofs and Windows are coated with anti-UV coatings to delay aging, while building curtain walls and outdoor billboards maintain long-term visual effects through weather resistance.
Chemical and energy equipment
The acid and alkali resistance property makes it suitable for chemical reaction vessels, pipeline protection, and highly corrosive environments in petrochemical equipment. The insulation layer of the new energy battery and the hydrogen fuel cell module adopt anti-UV and anti-adhesive film to enhance durability.