PI Electric Heating Film (Graphite)

　　This product uses high-purity natural flake graphite as its core heating material. Through a special manufacturing process, the graphite is transformed into a continuous, uniform conductive heating layer that is sandwiched between high-temperature-resistant insulating substrates (such as PI, PET, epoxy resin, and mica), forming an ultra-thin, flexible, yet rigid electrothermal film. Once energized, the graphite layer efficiently converts electrical energy into far-infrared thermal radiation in the 4–14 μm wavelength range, delivering large-area, glare-free, silent, comfortable, and highly efficient surface heating. It finds wide-ranging applications in building heating, health therapy, industrial insulation, and new energy fields.

　　Unlike heating elements made of metal wire, carbon paste, or carbon fiber, natural graphite heating cores offer significant advantages such as stable electrical resistance, rapid thermal response, long service life, and extremely low electromagnetic radiation, making them an ideal choice for high-end electric heating film products.

Core Advantages

Natural graphite heating core with exceptional performance.

Uses high-purity natural flake graphite with a purity of ≥99%, ensuring a stable conductive network with no aging or degradation.

Graphite resistors exhibit a negative temperature coefficient (NTC characteristics): as they heat up and their temperature rises, their resistance gradually decreases, causing the power consumption to increase step by step until thermal equilibrium is reached. Compared to the surge current impact caused by the “instantaneous full power” of metal wires, the graphite film’s gradual rise characteristic can effectively reduce the stress on the power supply and wiring, extend the service life, and enhance operational safety (eliminating the risk of ignition upon startup).

High thermal uniformity and small surface temperature differences (superior to metal wires/carbon paste under the same power level).

High-efficiency far-infrared radiation, healthy and comfortable.

Emitting 4–14 μm bio-light waves that resonate with and are absorbed by the human body, enhancing thermal efficiency and comfort.

No air convection or dust generation, suitable for clean environments (such as hospitals, laboratories, and homes).

Ultra-thin and flexible, easy to install.

Thin and lightweight, it can be rolled up, cut to size, and conform to curved surfaces (achievable with flexible coating materials);

Safe and reliable, long service life

The insulation layer is made of temperature-resistant, flame-retardant materials that produce no open flames, consume no oxygen, generate no noise, and offer excellent waterproof performance.

Through a 50,000-hour accelerated aging test, the designed service life is ≥20 years.

Energy-saving and environmentally friendly

Electrothermal conversion efficiency ≥ 99%;

It can be linked with an intelligent temperature control system to provide heating on demand, saving more than 20% in energy.

Customized services

Power density, size, and shape designed on demand;

Surface composite adhesive, reflective film, flame-retardant layer, or temperature sensor;

Both low-voltage DC and AC mains versions can be designed.

Product Parameters