The core material system is compatible with its characteristics Substrate characteristics PO (polyolefin) substrate: mainly composed of polyethylene (PE), polypropylene (PP), etc., it features excellent flexibility, chemical corrosion resistance and low moisture permeability, with significant cost-effectiveness. The temperature resistance (up to 120-150℃), UV resistance and surface hardness can be enhanced through modification (such as copolymerization and addition of nano-fillers). High-temperature resistant modification: Such as adding glass fiber, carbon fiber or nano-silica to enhance the heat resistance and dimensional stability of the substrate; The temperature resistance grade is enhanced by using cross-linking technology (such as electron beam cross-linking) to adapt to high-temperature processing scenarios.
Functional coating Uv-resistant layer: Integrated UV absorbers (such as benzotriazole type), light stabilizers (such as hindered amines type) or UV-resistant resins, blocking UVA/UVB radiation, preventing substrate aging, fading or cracking. For instance, outdoor billboards use PO film to achieve 3 to 5 years of weather resistance through an anti-UV coating. Anti-sticking layer: Silicone oil, fluoroplastic or non-silicone coating achieves low peel force (light peel type ≤0.1N/25mm), combined with nano anti-sticking technology (such as nanoparticles building a "microscopically rough but macroscopically smooth" surface), reducing adhesion and facilitating peeling. Anti-scratch layer: For instance, apply an anti-scratch coating (2-3μm thick) on the surface of the silicone layer to enhance wear resistance.
2. Processing technology and technological innovation Precision coating and lamination Coating process: 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, the PO anti-stick protective film is processed through multiple high-temperature ovens (such as 5 3m ovens) at a speed of 15-25m/min. After going through preheating, high-temperature baking, and shaping steps, the thermal shrinkage rate is achieved at ≤0.05%. Composite process: Multi-layer structures (such as PO base material + silicone layer + anti-scratch layer) are laminated under pressure through a composite wheel. After cooling, the edges are cut and wound to ensure the interlayer adhesion and dimensional stability. Nano anti-sticking technology: Nanoparticles (such as SiO₂, Al₂O₃) form low surface energy coatings through chemical bonds or mechanical interlocking, with a contact Angle greater than 90°, reducing the adhesion of molten materials and lowering demolding resistance by more than 50%.
Environmental protection and sustainable processes Replace oil-based lubrication with water-based UV coatings to reduce VOC emissions. The substrate recovery rate is ≥90%, which meets the requirements of a circular economy. Bio-based silicone oil and degradable substrates (such as PLA/PBS) reduce carbon footprints and adapt to the trend of green manufacturing.
3. Key performance and Quality control Weather resistance and UV resistance: UV blocking rate ≥98%, double 85 test (85℃/85% RH for 500 hours) no coating peeling or substrate deformation; The salt spray test shows no red rust for ≥96 hours and complies with the ISO 9227 standard. Anti-stick and mechanical properties: Peel strength 0.1-2.0N/25mm (light/heavy peel type), high wear resistance (such as nano-coating hardness HV 1500-2500), excellent tensile strength and impact strength, dimensional stability (linearity ≤1.5%). Environmental protection and safety: Complies with RoHS and REACH standards, no halogen or harmful substances are released; Passed the quality management system certifications such as ISO 9001 and IATF 16949.
4. Application scenarios and typical cases Electronic manufacturing: 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. Automotive industry: Suitable for sunroofs and car window anti-explosion films, integrated AG/AR/AF functions, enhancing display contrast and safety; The electric vehicle stickers are coated with an anti-UV layer to keep the color bright. After two weeks of exposure to the sun in Guangzhou, there was no color fading. Architecture and packaging: Building curtain walls and outdoor billboards maintain long-term visual effects by utilizing weather resistance. Food packaging and medical equipment reduce contamination and damage through anti-stick coatings. In the field of new energy: photovoltaic module bonding, insulation layer for hydrogen fuel cells, suitable for high-temperature and high-humidity environments.
