Aramid-Polyimide Blended Composite Base Fabric Felt: A Practical Material for High-Temperature Industrial Fire Protection Fields

In the fields of industrial filtration and high-temperature protection, the research and development, as well as the application of innovative materials, have always been the key driving force behind industry advancement. Aramid-polyimide blended composite base fabric felt, as a versatile fireproof and high-temperature-resistant material, plays a vital role in areas such as protective clothing and high-temperature filtration, thanks to its outstanding overall performance and flexible adaptability to various applications.

As a professional fire-resistant materials manufacturer certified under the ISO 9001 quality management system, Guangdong Kaidun has consistently spearheaded technological innovation in this specialized niche, thanks to its robust R&D capabilities and production expertise. This article will delve into the technical features and promising applications of this groundbreaking product.

The aramid-polyimide blended composite base fabric felt is made by combining para-aramid fibers with polyimide fibers through an innovative process, fully leveraging the synergistic effects of these two high-performance materials to achieve an optimized combination of enhanced properties.

1. Exhibits excellent thermal resistance. The benzene rings and nitrogen-containing five-membered heterocyclic structures within the polyimide fiber's macromolecular chain significantly enhance intermolecular forces through the conjugation effect of aromatic-heterocyclic units and carbon-oxygen double bonds. This unique molecular architecture endows the material with exceptional heat resistance, enabling it to maintain stable performance for extended periods in environments exceeding 200°C—and even withstand momentary temperatures as high as 550°C or more—providing a reliable solution for high-temperature applications.

2. Outstanding mechanical properties. Aramid fibers are renowned for their exceptional mechanical performance—weighing only one-fifth as much as steel but boasting tensile strength more than five times greater than that of steel. Aramid fibers exhibit excellent molecular alignment and contain rigid, crystalline units that readily organize into liquid crystal structures. In this liquid crystal state, the rigid molecular chains align in a highly ordered, parallel fashion, endowing the material with superior mechanical strength and dimensional stability.

3. Exhibits excellent chemical stability.

Polyimide fibers exhibit excellent chemical stability, allowing them to be used reliably for extended periods in most organic solvent conditions. Notably, their alkali resistance surpasses their acid resistance. This unique property enables the material to maintain consistent performance even in challenging, chemically complex environments, thereby expanding its applications in corrosive settings.

4. Outstanding filtration performance.

Polyimide fibers have an irregular cross-sectional shape and a high specific surface area, which significantly enhances their ability to capture dust particles and improves filtration efficiency. This unique characteristic makes them exceptionally effective in the field of filtration and separation, particularly well-suited for capturing and handling fine particulate matter.

Thanks to its outstanding comprehensive performance, aramid-polyimide blended composite base fabric felt demonstrates broad application prospects across multiple industrial sectors.

1. The industrial high-temperature filtration field. In the treatment of high-temperature flue gases from industries such as cement, steel, and power generation, this material demonstrates outstanding performance. Notably, in the flue gas treatment at the kiln tail of cement plants, it can withstand temperature fluctuations caused by operational variations, effectively preventing damage to conventional filter materials due to overheating.

2. Manufacturing of specialized protective equipment. In the field of special-purpose protection, this material offers an ideal solution for fire-fighting suits, advanced protective gear, and industrial workwear, among other applications. Its outstanding heat resistance, flame retardancy, and comfort make it the material of choice for high-end protective equipment. Compared to conventional protective materials, it significantly enhances both wearing comfort and mobility while maintaining the same level of protection.

3. Aerospace, Aviation, and Transportation. This material is used in thermal protection systems, cabin interiors, and equipment insulation, among other applications. Its lightweight yet high-strength properties perfectly meet the aerospace industry's demand for weight reduction, while also complying with stringent fire safety standards. In the rail transportation sector, it finds application in areas such as train interiors, equipment compartment insulation, and fire-resistant barriers, ensuring operational safety and reliability.

4. New Energy and Electrical Insulation. This material is used for thermal insulation protection in lithium battery packs, as well as for heat preservation in solar energy equipment and other applications. Its outstanding electrical insulation performance and high-temperature resistance make it an ideal choice for insulating electrical devices, particularly demonstrating exceptional reliability in high-voltage and high-temperature environments.

5. Architecture and Safety Protection: Applied in areas such as fire isolation in high-rise buildings, protection of emergency escape routes, and fireproofing of steel structures. Compared to traditional building materials, it offers advantages like lightweight design, superior fire resistance, and ease of construction, providing a new solution for modern building safety.

6. Environmental Protection and Energy Recovery: This material is used in high-temperature gas filtration, hazardous substance capture, and energy recovery systems. Its exceptional corrosion resistance and thermal stability enable it to effectively handle a wide range of industrial exhaust gases and pollutants, thereby contributing to environmental protection and energy recovery efforts.

Compared to traditional materials, aramid-polyimide blended composite base cloth felt demonstrates multiple technical advantages: significantly extended service life—exceeding 6 years in theory—leading to a substantial reduction in replacement frequency and maintenance costs. This is made possible by the material's outstanding thermal resistance, mechanical strength, and chemical stability. Additionally, energy efficiency is markedly improved; its unique structure and surface characteristics minimize operational resistance, resulting in a significant drop in system energy consumption. In filtration applications, the pressure differential can be maintained at a lower level, further reducing fan energy usage. Safety performance is also comprehensively enhanced, thanks to exceptional flame-retardant properties and low-smoke, non-toxic characteristics, providing enhanced safety guarantees for a wide range of application scenarios. Moreover, the material’s environmental adaptability has been strengthened, enabling it to thrive in various harsh conditions—including high temperatures, corrosive environments, and even radiation exposure—thereby expanding its versatility across diverse fields.

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