Polyimide woven fabric for special high-temperature workwear.

Polyimide woven fabric is a textile product made using high-performance polyimide fibers as the raw material and employing traditional weaving techniques that involve interlacing warp and weft yarns.

Polyimide woven fabrics can operate continuously in environments exceeding 260°C, with a glass transition temperature often surpassing 300°C. In short bursts, they can withstand flame exposure at temperatures as high as 500°C or even higher without melting or dripping—only undergoing slow carbonization. Polyimide boasts a high limiting oxygen index, meaning it is virtually impossible to ignite in ordinary air and qualifies as a long‑lasting flame‑retardant material. Even when exposed to open flames, it does not melt into scorching droplets like many synthetic fibers, which can cause secondary injuries; instead, it forms a robust char layer that provides thermal insulation and effectively prevents further flame penetration.

Polyimide’s high strength and high modulus endow its woven fabrics with exceptional tensile, tear, and abrasion resistance; the specific strength of its fibers (the ratio of strength to density) can exceed that of premium special steel by more than five times.

At the same time, it boasts an extremely low moisture absorption rate, outstanding resistance to chemical solvent corrosion, and commendable electrical insulation properties. Its dielectric constant and tangent of the loss angle remain stable over a wide frequency range and at high temperatures. It exhibits exceptional resistance to ionizing radiation such as gamma rays, is highly resistant to chemical corrosion, and has an extremely low moisture absorption rate.

Through the regular interlacing of warp and weft yarns, a dense, smooth, and stable fabric structure is formed. This structure offers multiple key advantages: First, it provides exceptional dimensional stability and shape retention. When subjected to stresses in all directions, woven fabrics are resistant to significant deformation and can maintain their intended shape with remarkable fidelity—making them indispensable as the skeletal framework for composite materials or as precision insulation components. Second, the fabric exhibits outstanding structural integrity and peel resistance. The warp and weft yarns are tightly interlocked; even if individual yarns become damaged, cracks are unlikely to propagate, allowing the overall fabric to retain considerable strength. Third, woven fabrics offer unparalleled design flexibility. By adjusting yarn count (thickness), twist level, weave construction (such as plain weave, twill weave, or satin weave), and warp‑weft density, manufacturers can precisely control the final fabric’s thickness, weight, softness, air permeability, surface friction coefficient, and mechanical properties in different directions—enabling tailor‑made solutions that meet a wide array of diverse application requirements.

In the cutting-edge field of aerospace, it is a crucial material for ensuring flight safety. It is used as an insulating cladding in high‑temperature areas such as aircraft and spacecraft engine nacelles and thrust reversers, effectively shielding sensitive equipment and cables from thermal damage. Thanks to its lightweight, high‑strength properties and excellent wave‑transmitting performance, it is also frequently employed as a reinforcing fabric for functional components like radar domes and antenna radomes; when combined with resins, it can simultaneously fulfill both structural load‑bearing duties and electromagnetic signal transmission. Inside spacecraft and satellites, it serves as a reliable insulation sheath for cables and wires, a wrapping layer for high‑temperature pipelines, and a dependable fire‑resistant and heat‑insulating material for舱 walls, quietly safeguarding the safety of invaluable equipment and astronauts.

In the field of specialized safety protection, polyimide woven fabric directly forms a critical line of defense for safeguarding lives. It serves as the core fabric layer in advanced fire-fighting suits, race car flame‑retardant suits, arc flash protective garments, and specialized high‑temperature workwear used in industries such as petrochemicals and metallurgy. When confronted with flames reaching thousands of degrees, its non‑combustible and non‑dripping properties buy rescue personnel or workers precious time to respond and evacuate safely. Moreover, when combined with other functional fabrics, it can be engineered into cutting‑edge protective systems that offer both fire resistance and thermal radiation protection while maintaining a degree of comfort and breathability. In addition, thanks to its high strength, cut resistance, and high‑temperature tolerance, polyimide woven fabric also holds a prominent position in high‑end bulletproof and explosion‑proof equipment—acting as a cushioning and insulating layer within composite armor or as an internal protective material for specialized vehicles.

In high‑temperature industrial and filtration applications, it demonstrates exceptional durability. Around the hot-end components of large industrial boilers and gas turbines, insulation blankets and protective curtains made from polyimide woven fabrics can withstand the relentless erosion of high‑temperature gas flows over extended periods. In the chemical and waste incineration industries, baghouse filter media crafted from this material efficiently capture dust particles from high‑temperature flue gases while resisting both the chemical corrosion of the flue gas and high‑temperature oxidation—resulting in a service life that far exceeds that of conventional filter media. It is also used to manufacture high‑performance, high‑temperature‑resistant conveyor belts, sealing materials, and electrical insulation sleeves that operate reliably even in harsh industrial environments.

In the fields of electrical and electronic engineering as well as cutting‑edge technologies, it provides a fundamental guarantee of performance. As the power density of electronic devices continues to rise, thermal management and localized overheating have become severe challenges. Polyimide woven fabric–reinforced composites, thanks to their high thermal conductivity, excellent insulation properties, and low thermal expansion, are used in high‑end circuit board substrates, chip packaging substrates, and more. In the emerging fields of flexible electronics and wearable devices, their fabric-like structure offers an ideal flexible substrate for integrating sensing elements. Even more intriguingly, in maglev trains or certain specialized motors that strive for ultimate speed, these materials are employed to manufacture lightweight, high‑temperature‑resistant coil insulation cores.

Kaidun Industrial’s polyimide products also include polyimide felt, polyimide lifting slings, polyimide wadding, polyimide foam, polyimide colored filaments, polyimide nonwoven fabric composite aramid filament fabric, and polyimide composite aramid base fabric, among others.

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