What Are The Benefits of Choosing Pre-oxidized Yarn?

Understanding Pre-Oxidized Fiber: The Key to Fire and Heat Protection Materials

Introduction

In industries where fire and high-temperature exposure are constant challenges, pre-oxidized fiber has emerged as a revolutionary solution. Known for its excellent flame resistance, heat insulation, and dimensional stability, pre-oxidized fiber is widely used in protective clothing, industrial seals, automotive components, and aerospace materials.
With advanced production technology and deep processing capabilities, Dongguan Yuexin Industrial Co., Ltd. provides high-quality pre-oxidized fiber nonwoven and felt products designed to meet the most demanding thermal protection applications.

1. What Is Pre-Oxidized Fiber?

Pre-oxidized fiber (OF) is a type of high-performance fiber made by heating polyacrylonitrile (PAN) precursor fibers at controlled temperatures between 200°C and 300°C.
During this process, the thermoplastic PAN linear molecular chains are transformed into thermostable trapezoidal (ladder-like) structures, resulting in fibers that are:

• Non-melting and non-flammable under high temperatures

• Thermally stable and oxidation-resistant

• Able to maintain fiber morphology even during carbonization

This transformation significantly enhances carbonization efficiency and reduces production costs, making pre-oxidized fiber an essential intermediate material in the production of PAN-based carbon fibers.

2. How Pre-Oxidation Improves Fiber Performance

The pre-oxidation process is critical in determining the final quality of carbon and flame-retardant fibers.
Through controlled temperature management—between the glass transition temperature and the cracking temperature—the fibers undergo a stable internal chemical reaction that results in a heat-resistant ladder structure.

This structure gives the fiber exceptional properties:

• Maintains its fibrous form even at high carbonization temperatures

• Prevents melting or ignition during exposure to extreme heat

• Provides excellent mechanical strength and dimensional stability

• Enables further deep processing into fabrics, felts, or composites

As a result, pre-oxidized fiber serves both as a final product (for direct industrial use) and as a key raw material for producing carbon fibers.

3. Applications of Pre-Oxidized Fiber

Because of its outstanding heat resistance and flame retardancy, pre-oxidized fiber is used across various industries that demand superior safety and durability.

Main Applications Include:

• Thermal Protective Clothing — Firefighter suits, welding garments, and industrial uniforms

• Spark Protection Blankets & Welding Mats — Preventing flame spread in metalworking environments

• Automotive Components — Used in disc brake pads, clutch plates, and fire-resistant seat fabrics

• Aerospace & Aviation — High-performance fire-retardant fibers for aircraft seating and insulation layers

• Industrial Seals and Fillers — Withstanding extreme heat and friction in mechanical systems

• Building & Insulation Materials — Nonwoven and felt forms of pre-oxidized fiber provide both thermal and acoustic insulation

• Carbon Fiber Reinforced Composites — Serves as the precursor for carbon fiber-reinforced clutch systems and transmissions

Essentially, pre-oxidized fiber is used wherever high temperature resistance and flame protection are critical.

4. Advantages of Pre-Oxidized Fiber Nonwoven and Felt Products

At Dongguan Yuexin Industrial Co., Ltd., we specialize in manufacturing pre-oxidized fiber nonwoven fabrics and felts, which provide superior flame-retardant and insulation performance compared to conventional materials.

Key Advantages:

• Excellent Flame Retardancy – Non-flammable and self-extinguishing under heat

• High-Temperature Resistance – Stable up to 300°C continuous exposure

• Chemical and Oxidation Resistance – Withstands harsh industrial environments

• Lightweight and Flexible – Easy to install, cut, or shape for different applications

• Eco-Friendly – Non-toxic, safe for human use, and sustainable in production

These properties make Yuexin’s pre-oxidized fiber felts ideal for fire barriers, thermal insulation layers, industrial filtration, and safety textiles.

5. Why Choose Dongguan Yuexin Industrial Co., Ltd.

With over 25 years of experience in fiber research, production, and innovation, Yuexin has become a trusted name in the nonwoven and technical textile industry.
Our pre-oxidized fiber products are developed using advanced thermal stabilization technology, ensuring:

• Consistent quality across all batches

• Compliance with international safety and environmental standards

• Customizable specifications for specific applications

• Competitive pricing with fast delivery

We take pride in delivering durable, reliable, and high-performance pre-oxidized materials that support industries in achieving their fire protection and sustainability goals.

Conclusion

Pre-oxidized fiber represents the future of fire-resistant and high-temperature textile materials. Its unique combination of thermal stability, non-flammability, and structural integrity makes it indispensable in multiple industrial sectors—from aerospace to automotive manufacturing.

As a leading supplier, Dongguan Yuexin Industrial Co., Ltd. continues to advance in pre-oxidized fiber technology, offering customized nonwoven and felt solutions that combine safety, performance, and cost efficiency.

For more information or to request product samples, contact us today and experience how Yuexin’s innovation can power your next project.