Polyimide Film Insulated Flexible Heaters

Description

1. Structural design

This heater uses etched nickel-chromium alloy foil sheets (with a thickness of 0.0001"-0.0005") as conductive heating elements, sandwiched between two layers of polyimide films (with a thickness of 0.002"), and forms an integrated structure through high-temperature and high-pressure heat sealing process. Some models are covered with FEP adhesive or silicone rubber layer outside the polyimide layer to enhance mechanical stability and environmental resistance. The overall thickness is usually between 0.09mm and 0.14mm, with the thinnest reaching 0.10mm, combining lightness, thinness and flexibility.

2. Working Principle

After being electrified, the nickel-chromium alloy foil generates Joule heat, which is uniformly conducted to the heated object through the polyimide film. Polyimide film not only provides electrical insulation (dielectric strength > 100kV/mm), but also can withstand extreme temperatures and chemical corrosion.

Core Advantages

1. Wide temperature resistance range: It can operate from -269 °C to 260°C for a long time and withstand up to 400°C for a short period, making it suitable for extreme environments. ​

2. Good flexible adhesion: With a minimum bending radius of 0.8mm, it can closely adhere to curved surfaces and is lightweight, making it suitable for scenarios with limited space. ​

3. High power density: Up to 50W/in², with a fast thermal response, enabling rapid heating. ​

4. Resistance to harsh environments: Resistant to radiation and chemical corrosion, it can operate stably even in a vacuum environment. ​

5. Precise temperature control: It can be integrated with temperature control components to achieve ±1°C accuracy control.

Typical Specifications

Application Scenarios

1. Aerospace and national defense

Satellite electronic equipment is protected from low temperatures (-190°C), such as de-icing communication antennas.

The sensors of the missile guidance system are kept at a constant temperature to ensure reliability in extreme environments.

2. Medical and Life Sciences

The sample of the blood analyzer is kept at a constant temperature (37°C±0.1°C), and the thermal circulation module of the PCR instrument.

Medical endoscope probes are fog-proof to prevent condensation from affecting imaging.

3. New Energy and Automobiles

Electric vehicle battery pack heating (-30°C to 50°C) enhances winter driving range.

Defrosting for autonomous driving LiDAR to ensure sensor performance.

4. Industry and Semiconductors

Semiconductor wafer heating (200°C±2°C) for photoresist curing.

Heat tracing of pipelines in chemical reaction vessels to prevent the solidification of high-viscosity fluids.

5. Consumer electronics and household appliances

The smart thermos cup heats up quickly (55°C), and the wireless charging base prevents overheating.

High-end hair dryer ceramic heating element, uniform temperature control for hair care.