High Temperature Polyimide Film: Thermal Resistance and Extreme Environment Applications

What Is High Temperature Polyimide Film?

High temperature polyimide film is a high-performance polymer film designed for applications requiring excellent thermal stability, electrical insulation and mechanical reliability. Due to its outstanding resistance to temperature changes, dimensional stability and dielectric properties, polyimide film has become an important insulation material for electronics, electrical components, automotive systems, energy equipment and other industrial applications.

FORTUNE HN Polyimide Film, manufactured by Tianjin Fortune International Industry and Trade Co., Ltd., is a high-performance polyimide film developed for demanding insulation applications. It combines excellent thermal stability, mechanical strength and electrical insulation performance to meet the requirements of industries operating under high-temperature and challenging environmental conditions.

Polyimide Temperature Resistance: Performance in Extreme Conditions

One of the most important characteristics of polyimide film is its outstanding temperature resistance. In industrial applications, insulation materials must maintain stable performance when exposed to high temperatures, temperature changes and long-term operation.

Wide Temperature Resistance Range of Polyimide Film

FORTUNE HN Polyimide Film provides excellent thermal stability across a wide temperature range, typically from -269°C to over 400°C.

This outstanding polyimide temperature resistance allows the film to maintain reliable mechanical and electrical properties under extreme conditions. Compared with conventional polymer materials, polyimide film provides better stability when used in applications requiring continuous heat exposure.

Long-Term Heat Resistance Performance

The long-term heat-resistance temperature index of FORTUNE HN Polyimide Film is ≥180°C.

For electrical insulation materials, long-term heat resistance is an important consideration because continuous thermal stress may affect insulation reliability, dimensional stability and overall service performance.

By maintaining stable properties during extended exposure to elevated temperatures, high temperature polyimide film helps support reliable performance in demanding industrial environments.

Excellent Dimensional Stability Under Heat

In addition to thermal resistance, dimensional stability is another important property of polyimide film.

FORTUNE HN Polyimide Film provides controlled heat contraction performance:

• Heat contraction rate at 150°C: ≤1.0%
• Heat contraction rate at 400°C: ≤3.0%

Stable dimensional performance helps reduce deformation during high-temperature processing and operation, making polyimide film suitable for precision insulation applications.

Key Properties of High Temperature Polyimide Film

A high temperature resistant film needs to provide a combination of thermal stability, electrical insulation and mechanical strength. These properties determine whether the material can meet the requirements of different industrial applications.

Reliable Electrical Insulation Performance

Polyimide film is widely used as an electrical insulation material because it maintains stable dielectric performance under demanding conditions.

FORTUNE HN Polyimide Film provides the following electrical properties:

• Electrical operating frequency intensity: ≥150 MV/m 
• Surface resistivity at 200°C: ≥1.0 × 10¹³ Ω 
• Volume resistivity at 200°C: ≥1.0 × 10¹⁰ Ω·m 
• Relative dielectric constant (48–62Hz): 3.5 ± 0.4 
• Dielectric loss factor (48–62Hz): ≤4.0 × 10⁻³ 

These characteristics make the film suitable for applications requiring stable insulation performance under high-temperature conditions.

Strong Mechanical Strength and Flexibility

Although polyimide film is thin and lightweight, it provides excellent mechanical performance.

For FORTUNE HN Polyimide Film with thickness specifications from 0.0125 mm to 0.1 mm, tensile strength reaches:

• MD: ≥135 MPa
• TD: ≥115 MPa

For thicknesses from 0.125 mm to 0.25 mm, tensile strength reaches:

• MD/TD: ≥95 MPa

The elongation of FORTUNE HN Polyimide Film is ≥35%, providing good flexibility and resistance to tearing during processing and installation.

How to Select the Right Polyimide Film?

Selecting the right polyimide film requires consideration of the actual working environment, application requirements and expected performance.

Consider Film Thickness and Application Requirements

FORTUNE HN Polyimide Film is available in multiple thickness specifications:

• 0.0125 mm
• 0.025 mm
• 0.03 mm
• 0.04 mm
• 0.05 mm
• 0.075 mm
• 0.1 mm
• 0.125 mm
• 0.15 mm
• 0.175 mm
• 0.2 mm
• 0.225 mm
• 0.25 mm

Different thickness options allow customers to select suitable film based on flexibility requirements, mechanical strength and application design.

Evaluate Thermal and Electrical Performance

Before selecting a heat resistant film, engineers should evaluate:

• Temperature resistance range
• Long-term heat resistance
• Heat contraction performance
• Dielectric properties
• Surface resistivity
• Volume resistivity
• Tensile strength

A suitable polyimide film should provide stable performance throughout the expected service environment.

Choose an Experienced Polyimide Film Manufacturer

For industrial applications, manufacturer experience and production capability are important factors.

Tianjin Fortune International Industry and Trade Co., Ltd. was established in 2000 and began investing in polyimide film production in 2004. The company has accumulated years of experience in manufacturing polyimide film and insulation products.

The Tianjin factory covers an area of 86,000 square meters and operates six production lines, including four 700 mm-wide production lines and two 1040 mm-wide production lines.

With an annual production capacity of 280 tons of polyimide film, FORTUNE can provide stable supply capability for customers requiring different specifications.

The company’s technical team can produce polyimide films with thicknesses ranging from 0.015 mm to 0.25 mm, supporting customized requirements for various industrial applications.

FORTUNE HN Polyimide Film: High Temperature Insulation Solution

FORTUNE HN Polyimide Film is designed for applications requiring high temperature resistance, electrical insulation and mechanical reliability.

The product combines stable material performance with flexible thickness options, making it suitable for different industrial insulation requirements.

Key features include:

• Excellent thermal stability from -269°C to over 400°C 
• Long-term heat resistance temperature index ≥180°C 
• High tensile strength and flexibility
• Stable dielectric properties
• Excellent electrical insulation performance
• Thickness range from 0.0125 mm to 0.25 mm 

With professional production capabilities and stable product quality, FORTUNE HN Polyimide Film provides reliable material solutions for customers requiring high-performance insulation films.

Applications of FORTUNE HN Polyimide Film

Due to its combination of heat resistance, electrical insulation and mechanical properties, FORTUNE HN Polyimide Film is used in various industrial applications.

Electronics and Flexible Circuit Applications

Electronic components often require insulation materials that can withstand heat during manufacturing and operation.

Polyimide film is widely used in electronic applications because of its thin structure, flexibility and stable electrical properties.

Electrical Insulation Applications

FORTUNE HN Polyimide Film can be used for:

• Electrical insulation
• Pressure-sensitive tape
• Insulation blankets
• Insulation tubing

Its excellent heat resistance makes it suitable for insulation requirements in demanding environments.

Fiber Optic Cables, Sensors and Automotive Applications

Polyimide film is also used in:

• Fiber optic cables
• Automotive diaphragms
• Sensors
• Etching applications

These applications require materials with stable mechanical properties and reliable performance under different operating conditions.

Conclusion: Reliable High Temperature Polyimide Film from FORTUNE

High temperature polyimide film provides excellent thermal stability, electrical insulation and mechanical reliability for demanding industrial applications.

FORTUNE HN Polyimide Film combines advanced material performance with years of manufacturing experience in the electrical insulation industry. With multiple thickness options, stable product quality and professional production capabilities, FORTUNE provides reliable polyimide film solutions for global customers.

For companies looking for a high temperature resistant film or heat resistant film solution, FORTUNE HN Polyimide Film offers a reliable material choice for electronics, electrical insulation and industrial applications.

Contact FORTUNE today to discuss your polyimide film requirements.

Frequently Asked Questions About High Temperature Polyimide Film

What is the temperature resistance of polyimide film?

FORTUNE HN Polyimide Film provides excellent thermal stability, typically maintaining performance from -269°C to over 400°C, with a long-term heat resistance temperature index of ≥180°C.

What are the main applications of polyimide film?

Polyimide film is widely used for electrical insulation, electronic components, flexible circuits, pressure-sensitive tape, fiber optic cables, sensors and industrial insulation applications.

How to choose the right high temperature polyimide film?

The selection of high temperature polyimide film depends on factors such as temperature resistance, film thickness, electrical insulation requirements, mechanical strength and application environment.