PI Thermosetting Film PI Heat Film Polyimide PCB Masking Thermosetting adhesive film Brown High-Temperature Resistant

Our PI Thermosetting Adhesive Film is manufactured from high-performance polyimide film coated with a thermosetting epoxy adhesive. Protected by release film or paper during storage and processing, the adhesive forms a durable insulating layer after high-temperature curing.

This advanced film delivers exceptional flexibility, high-temperature resistance, superior electrical insulation, and reliable bonding performance. It is engineered for demanding applications that require heat resistance and stable electrical insulation, including PCB masking and FPC lamination.

PI thermosetting film — material structure and application overview

• Fast lamination compatibility — designed for quick and efficient lamination cycles, boosting production throughput.
• Excellent dimensional stability — maintains precise alignment and flatness throughout the lamination process.
• Superior electrical, chemical & thermal properties — ensures reliable insulation, corrosion resistance, and heat tolerance in demanding environments.
• Optimized glue flow control — promotes uniform adhesive distribution, reducing voids and improving bond strength, which is especially critical for high-quality FPC lamination.

Key features and technical specifications of the PI heating film

Our heating film offers two PI color choices (Yellow and Amber Kapton®-type), precision-etched foil for uniform heating, and an ultra-thin profile (0.13–0.22 mm) that feels completely unobtrusive. Its flexibility allows seamless adaptation to curved seat surfaces while withstanding millions of flex cycles. With strong dielectric insulation, moisture resistance, rapid heat-up, and a wide thermal range, this heater is built for year-round automotive use. We also support full customization of size, circuitry, resistance, voltage, leads, and terminals.

Shenzhen Tunsing Plastic Products Co., Ltd., established in 2007 and headquartered in Shenzhen, China, occupies a 10,000 m² manufacturing facility. We specialize in the development and production of high-performance polyimide (PI) films, etched foil heating elements, and flexible circuit materials. With years of technical expertise, we serve the automotive, electronics, and FPC industries, offering customized solutions that combine quality, reliability, and cost-effectiveness.

Shenzhen Tunsing manufacturing facility and production area

• Over 10 years of professional manufacturing experience, with products certified as Sichuan Famous Brand and the enterprise awarded AAA Grade Credit for reliable quality management.
• Strict full-process supervision covering raw materials to finished goods, with rigorous quality control implemented throughout production.
• Premium consistent quality paired with competitive pricing, plus flexible OEM customization services.
• Large in-house inventory to guarantee stable, continuous supply for all orders.
• Authoritative enterprise credit certification and standardized production systems to deliver trustworthy long-term cooperation.

Quality control and manufacturing process for PI thermosetting films