High-end Material: Polyimide Glass Cloth Laminate

High-end Material: Polyimide Glass Cloth Laminate

Polyimide glass cloth laminate, also known as bismaleimide insulation board, is a rigid polyimide resin laminate formed by hot pressing alkali-free glass cloth impregnated with polyimide resin as the binder. This product exhibits excellent flame retardancy, minimal internal stress, and superior mechanical and dielectric properties, while demonstrating robust performance in mechanical processing and high-temperature resistance. Polyimide (PI), renowned for its high-temperature tolerance, oxidation resistance, radiation resistance, corrosion resistance, moisture-heat resistance, high strength, high modulus, and excellent dielectric properties, has seen rapid expansion in applications across mechanical engineering, electronics, instrumentation, petrochemicals, and metrology. It is widely used as insulating structural components in Class H motors and electrical equipment.

What makes polyimide glass cloth laminate supreme than other materials?

Superior high-temperature resistance: This is its most prominent feature, capable of long-term stable operation at 200℃. Some models can withstand intermittent use at 250℃, while certain special grades can even endure higher temperatures. It maintains excellent mechanical and electrical properties even in high-temperature environments. For instance, its bending and tensile strength at 200℃ remains over 78% of normal temperature performance.

Outstanding comprehensive mechanical properties: featuring high overall rigidity, excellent dimensional stability, and superior impact and compression resistance. For instance, the PIGC301 laminate achieves a bending strength of 540MPa and an elastic modulus of 5000MPa, fully meeting the stringent mechanical support requirements of structural components.

Reliable electrical and chemical properties: Featuring excellent electrical insulation, it maintains high insulation resistance even in high-temperature and humid environments. Some products achieve a dielectric strength of 22 kV/mm in 90°C oil . Additionally, it demonstrates strong chemical corrosion resistance, suitable for humid environments, transformer oil, and certain chemical media applications. With a low water absorption rate, the 2mm-thick sheet absorbs only 0.4% water.

Easy processing and flame retardancy: It can be machined and drilled by standard machine tools, similar to epoxy glass materials. It has good flame retardancy, and some models can reach UL94 V-0 flame retardancy grade, with high safety.

From space to the ground: Showing outstanding performance

In aerospace engineering, it serves as a "key supporting component" – used as solar cell substrates for satellites, insulating gaskets for rocket engines, and instrument panel panels in aircraft cockpits. For instance, in manned spacecraft, it must withstand extreme space temperatures, intense radiation, and scorching heat during atmospheric re-entry, ensuring the safety of astronauts.

In the field of electronics and electrical engineering, it serves as the "insulation pioneer". The power amplifier in 5G base stations requires it to isolate high-voltage signals, while the IGBT module (power control core) in new energy vehicles uses it as an insulating liner. Even during chip packaging, it doubles as both a heat dissipation and insulation carrier, enabling electronic devices to achieve the breakthrough of "high power, small size".

In advanced manufacturing, this material serves as a precision engineering solution. For semiconductor wafer processing, it functions as a high-precision carrier that maintains dimensional stability in high-temperature environments. In medical devices, it is engineered as insulating components for surgical instruments, withstanding sterilization heat while preventing tissue irritation. Even in high-end kitchenware, some heat-resistant baking trays utilize this material as their base layer.

Continuously evolving for the future

With the upgrading of high-end manufacturing industry, this material is also continuously evolving: through the optimization of glass cloth weaving process, its mechanical strength has been improved by more than 20%; with the help of resin modification technology, it can also be endowed with special properties such as high thermal conductivity and strong radiation resistance, which are suitable for more specific scene requirements.

Emerging fields such as new energy, artificial intelligence and deep space exploration have opened up broad new tracks for it: it can not only be used as the support substrate of hydrogen fuel cell proton exchange membrane, but also serve as the insulation component of extreme temperature for lunar exploration vehicles. The application boundary will continue to expand in the future.

From a simple combination of glass fiber and resin to a "must-have material" for high-end manufacturing, the development of polyimide glass cloth laminate is a vivid epitome of how materials science empowers industrial innovation through "precision design + process upgrading".

RDS Composite manufactures polyimide glass cloth laminate with high standards. Our products are carefully managed from raw material procurement through the entire production process to ensure they meet international standards. We are committed to providing you with reliable quality products and timely delivery of services.