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What are the specific applications of pre-oxidized fiber in the aerospace field?

2026-01-10 15:47:30

14711

Pre-oxidized fiber is a key intermediate product in carbon fiber production, and its direct applications in the aerospace field are relatively limited—most of it is further processed into high-performance carbon fiber (via carbonization and graphitization) for aerospace structural components. However, pre-oxidized fiber also has unique application scenarios in the aerospace industry, leveraging its non-melting, flame-retardant, and high-temperature stable properties. Below is a detailed breakdown of its specific applications, tailored for B2B aerospace content:

1. Core Application: Precursor for Aerospace-Grade Carbon Fiber Production

This is the most fundamental and large-scale application of pre-oxidized fiber in aerospace. High-performance carbon fiber (e.g., T800, T1000, M55J grades) used in aerospace components must be derived from qualified pre-oxidized fiber—the quality of pre-oxidized fiber directly determines the mechanical properties of the final carbon fiber.

Corresponding aerospace components:
- Aircraft primary structural parts: Fuselage panels, wing spars, tail sections of commercial airliners (e.g., Boeing 787, Airbus A350) and military aircraft. These parts require carbon fiber with high tensile strength and modulus to reduce weight while ensuring structural safety.
- Rocket and missile components: Rocket fairings, engine casings, solid rocket motor nozzles. The carbon fiber made from pre-oxidized fiber can withstand extreme temperature fluctuations and high-pressure loads during launch.
- Satellite and spacecraft structures: Satellite antenna supports, solar panel frames, spacecraft hulls. These components need lightweight, high-stiffness carbon fiber to maintain dimensional stability in the vacuum and extreme temperature environment of space.
Technical link: Only moderately oxidized fiber (density 1.3–1.4 g/cm³, oxygen content 10–15%) can be carbonized into high-quality aerospace-grade carbon fiber. Under-oxidized or over-oxidized fiber will cause carbon fiber to have defects such as porosity, brittleness, and low strength, which cannot meet aerospace safety standards.

2. Direct Application: Flame-Retardant and Heat-Insulating Components in Aerospace

Pre-oxidized fiber itself has thermoset properties, non-melting characteristics, and inherent flame retardancy (no dripping when burned, and forms a stable carbon layer on the surface). These properties make it suitable for direct use in aerospace components that require fire protection and heat insulation.

(1) Aircraft cabin interior fire-resistant parts
- Specific applications: Cabin ceiling panels, partition walls, seat back frames, and cargo compartment linings.
- Aerospace value: Aerospace regulations (e.g., FAA FAR 25.853) have strict requirements for the flame retardancy, smoke density, and toxicity of cabin materials. Pre-oxidized fiber fabrics do not burn in open flames, produce little smoke, and do not release toxic gases—far better than traditional polymer materials (e.g., plastic, foam). They can effectively slow down the spread of fire in the cabin and improve passenger survival rate in emergency situations.
- Process form: Woven into pre-oxidized fiber cloth or made into non-woven mats, then compounded with phenolic resin to enhance mechanical strength and heat insulation performance.
(2) Rocket and missile heat-insulating components
- Specific applications: Internal heat insulation layers of rocket launch vehicle fuel tanks, heat shields for missile warheads, and thermal insulation linings of engine combustion chambers.
- Aerospace value: During rocket launch, the engine combustion chamber temperature can reach 3000°C or higher, and the fuel tank needs to store low-temperature propellants (e.g., liquid oxygen at -183°C). Pre-oxidized fiber has good thermal stability (does not decompose below 300°C) and low thermal conductivity, which can isolate high temperature and low temperature, protect the structural integrity of the tank, and prevent propellant volatilization or explosion.
- Advantage compared to traditional materials: Lighter than ceramic heat insulation materials (density 1.3–1.4 g/cm³ vs. 2.0–3.0 g/cm³ for ceramics), which helps reduce the take-off weight of rockets and improve payload capacity.

3. Special Application: High-Temperature Resistant Filter Materials for Aerospace Ground Equipment

Aerospace ground test equipment (e.g., rocket engine test benches, aircraft engine exhaust test systems) generates a large amount of high-temperature exhaust gas containing solid particles (e.g., metal oxides, carbon particles) during operation. Pre-oxidized fiber is used to make high-temperature resistant filter materials for these scenarios.

Specific applications: Filter elements of exhaust gas purification systems for engine test benches.
Aerospace value: Pre-oxidized fiber can withstand continuous high temperatures of 200–300°C and intermittent high temperatures of 500°C, and has good chemical stability (does not react with acidic or alkaline exhaust gas components). It can effectively capture solid particles in exhaust gas, protect test equipment from wear, and meet environmental emission standards.
Process form: Made into felt or porous filter cartridges, with a filtration efficiency of more than 99% for particles above 1 μm.

Carbon Fiber,Pre-oxidized Fiber,Carbon Fiber Prepreg