High-Temperature-Resistant PP Self-Adhesive Film – Application Scenarios

I. Food Packaging Sector (largest application area, categorized into retortable and non-retortable types) 
1. High-temperature steam-cooking self-adhesive packaging film 
Operating conditions: 121°C for 30 minutes under high-pressure steam sterilization; throughout the process, the film must remain free of softening, warping, delamination, and leaching, and comply with food-grade standards. 
Products: self-adhesive lid films for retort pouches, stand-up retort pouch surface protection films, self-adhesive outer packaging films for cooked foods, braised dishes, and sauces, and vacuum‑retort conforming films. 
Features: The self-adhesive layer is food-grade SEBS-modified, maintaining adhesion at high temperatures, free of off‑odors, and non‑migratory to prevent contamination of the contents; the film exhibits low shrinkage, ensuring a smooth appearance after retorting. 
2. Protective film for baking / hot-filling applications 
After coming into contact with high-temperature materials ranging from 80 to 125°C, the finished product undergoes hot-air drying or tunnel baking, with short-term peak temperatures exceeding 120°C. 
Products: Self-adhesive film for pastry trays, temporary protective film for hot-filling beverage bottles, release liner for baking molds, and high-temperature-resistant label backing film. 
3. Dual-purpose film for quick-freezing and high-temperature reheating 
Operating conditions: frozen storage at −20°C, followed by reheating in a microwave or steam oven at 100–120°C, resulting in a wide temperature range.

II. Upholstery & Composite Printing Industry (Post-Press High-Temperature Processing) 
1. Temporary protective film for printing/lamination processes 
Operating conditions: color printing, dry lamination, and extrusion lamination; oven temperatures typically range from 110 to 130°C. The film must remain adhered throughout the process, with no delamination or residual adhesive. 
2. Aluminum‑coated CPP self‑adhesive film (high‑end packaging / optical film) 
Operating conditions: vacuum aluminum plating process, with furnace temperatures ranging from 110 to 125°C; the substrate must exhibit low outgassing, high adhesion, and dimensional stability at elevated temperatures. 
3. Self-adhesive film compatible with aluminum-plastic composite film 
1. Lithium battery aluminum-plastic film 
Operating conditions: Process baking at 120–130°C and electrolyte immersion; requirements include temperature resistance, chemical resistance, and dimensional stability. 
Applications: Surface protection during the production of aluminum‑plastic laminates, and as a release liner for slitting and rewinding. 
2. Pharmaceutical/Medical Aluminum-Plastic Film 
Operating conditions: ethylene oxide sterilization, high‑temperature drying (115–125°C); pharmaceutical‑grade with low leachables.

III. Electronics & Optoelectronics Industry (Key Requirements: High Cleanliness, High-Temperature Resistance, and No Residual Adhesive) 
This sector has the most stringent requirements for temperature resistance, cleanliness, and appearance, making it the primary market for high-end, high-temperature‑resistant self‑adhesive films. 
1. Circuit board / PCB process protection film 
Operating conditions: Peripheral protection during wave soldering and reflow soldering, with localized short‑term temperatures reaching 120–130°C; circuit board baking and curing at 110–125°C. 
Applications: Temporary protection of PCB surfaces, masking of gold fingers, and solder mask protection. 
2. Optical Lenses / Display Screen Protector 
Operating conditions: lens coating, thermal pressing of the screen backlight module, and baking of the backlight board (110–120°C). 
Subcategories: acrylic/PC lens protection films, LCD panel polarizer auxiliary films, and self-adhesive surface films for light guide plates. 
3. Protective Film for Appliance Casings & Plastic Parts 
Operating conditions: High-temperature baking (110–125°C) after appliance coating, and secondary thermoforming of injection-molded parts. 
• Applications: Protection of finished plastic parts for air conditioners, washing machines, and kitchen appliances; masking during the spraying process. 
4. Protective Film for New Energy Components 
• Photovoltaic backsheet, energy storage components, and wire harness insulation film: withstand prolonged outdoor high temperatures (with surface temperatures reaching up to 120°C in summer), while offering both weather resistance and thermal stability.

IV. Building Materials & Daily Industrial Applications (Large-Area Bonding, Long-Term High-Temperature Environments) 
1. High-Temperature-Resistant Profile/Sheet Protective Film 
Operating conditions: PVC/PP/aluminum alloy profiles and decorative panels, subjected to high-temperature aging after production and installed for outdoor use. 
• Temperature conditions: In the workshop, baking temperatures range from 110 to 120°C; under outdoor sun exposure, surface temperatures can exceed 120°C. 
• Features: High film stiffness, long-term adhesion without delamination, and residue-free removal. 
2. Self-adhesive film for pipe/rubber-plastic insulation materials 
• Operating conditions: Thermal pipelines and industrial insulation pipes, with long-term exposure to media at **100–125°C**, requiring surface protection and isolation. 
3. Isolation film for rubber/silicone products 
Operating conditions: rubber vulcanization and silicone hot‑press molding, with mold temperatures ranging from 110 to 130°C; used as a release‑and‑adhesive self‑adhesive film. 
• Advantages: Compared with PET film, PP self-adhesive film offers superior flexibility and better conformability to curved surfaces; compared with standard PE film, it exhibits significantly improved temperature resistance.

V. Automotive Industry (Multi-Process High-Temperature Manufacturing + High-Temperature Use in Complete Vehicles) 
1. Automotive interior trim protective film 
Operating conditions: Interior PP/ABS components, headliners, and door panels are dried at 110–125°C after spraying and flocking. 
• Requirements: low odor, minimal outgassing, and no adhesive loss at high temperatures, in compliance with automotive VOC standards. 
2. Automotive Piping / Engine-Perimeter Protective Film 
Operating conditions: Components in the engine compartment, with ambient operating temperatures consistently ranging from 100 to 120°C, and localized peak temperatures even higher. 
• Applications: wire harness wrapping and surface protection for rubber hoses, offering excellent resistance to heat and oil while providing self-adhesive properties. 
3. Headlight Assembly Protective Film 
Headlamp lens coating and post-assembly baking are performed at a temperature of 110–120°C, with requirements for high transparency, scratch-free surfaces, and no residual adhesive.