Pre-oxidized silk knitted fabric used for thermal insulation and high-temperature resistant linings in aircraft seats and combat uniforms.

Preoxidized fiber knitted fabric is a high-performance textile material made primarily from preoxidized fiber and processed using knitting techniques.

Characteristics of pre-oxidized silk knitted fabric:

1. Flame Retardancy and Heat Resistance

Pre-oxidized spunbonded fabric is made from polyacrylonitrile (PAN) fibers, with a limiting oxygen index (LOI) exceeding 45%. This means that in normal air—where the oxygen content is about 21%—the fabric simply cannot sustain combustion. When exposed to flame, it only chars slowly, forming a carbon layer that effectively insulates against heat and oxygen without softening, melting, or shrinking. This completely eliminates the risk of secondary injuries caused by molten droplets adhering to the skin or igniting other materials, making it a critical safeguard for personal safety. This fabric can maintain stable performance over the long term even at temperatures as high as 220°C, and can briefly withstand temperatures up to 300°C or even higher. Thanks to these exceptional properties, in industrial environments characterized by sustained high temperatures, this fabric does not become brittle or age like ordinary textiles, ensuring the durability and reliability of its protective performance.

2. Excellent physical and chemical stability

Preoxidized silk fibers exhibit excellent resistance to most acids, bases, organic solvents, and oils. This means that in environments such as chemical plants, oilfields, or machining workshops—where chemical splashes or oil contamination are common—protective garments or equipment covers made from preoxidized silk knitted fabrics will not rapidly corrode or degrade upon contact with these chemicals, thereby ensuring a long service life.

Preoxidized silk fibers themselves possess high strength. Combined with the toughness and wrinkle resistance imparted by the knitted structure, preoxidized silk knitted fabrics are highly abrasion-resistant and durable, capable of withstanding a certain degree of friction and repeated bending. They are ideally suited for dynamic work environments that require frequent movement and wear.

3. The fabric is soft and comfortable.

The knitting process gives pre-oxidized silk knitted fabric exceptional softness, drape, and multidirectional elasticity. As a result, protective garments made from this fabric can closely follow the contours of the human body, offering remarkable freedom of movement at the joints while eliminating the stiffness and constriction often associated with traditional protective clothing. This significantly enhances wearing comfort and work efficiency.

Pre-oxidized silk fibers themselves have a relatively low density. After being made into knitted fabric, the structure becomes fluffy and airy, resulting in a lightweight finished product that effectively reduces the overall burden of the equipment. At the same time, these fibers exhibit excellent moisture-absorbing properties, helping to wick away moisture from the skin’s surface and keeping the wearer feeling dry and comfortable—making them especially valuable in high-temperature and high-intensity work environments.

Application areas of pre-oxidized silk knitted fabric:

1. Industrial Safety and Protection Field

Welding blankets and protective curtains made from pre-oxidized silk knitted fabric have a soft texture and are easy to cut, roll up, and conform to complex equipment or pipelines. They offer welders, steelmakers, and other workers greater flexibility—effectively shielding against sparks and high-temperature molten slag while minimizing interference with work efficiency, thus achieving a seamless balance between protection and convenience.

Pre-oxidized silk knitted fabric, with its lightweight, soft texture, and excellent water-absorbing properties, is ideally suited as a lining or comfort layer for fire-fighting suits. Not only does it offer superior flame-retardant and thermal-insulating protection (with a limiting oxygen index LOI > 45% and the ability to remain non-melting and non-dripping when exposed to fire), but its knitted structure also provides exceptional elasticity, enabling it to better accommodate firefighters’ vigorous movements. This significantly reduces the burden of wearing the suit, enhancing mobility and endurance in fire environments.

2. Aerospace and High-end Transportation sector

Inside the aircraft, this material not only serves as a critical reinforcing preform for brake pads but also boasts a knitted structure that allows for better resin impregnation, resulting in composite materials with more stable performance. As an interior thermal insulation layer, its unique structure effectively blocks heat transfer and reduces noise, thereby enhancing passenger comfort. It can also be used as seat upholstery or interior trim, significantly improving the cabin’s flame-retardant safety rating and providing passengers with a soft yet secure protective barrier. Thanks to its lightweight yet high-strength properties and exceptional fire-resistant performance, pre-oxidized silk knitted fabric can be employed in various aircraft components, such as seats and interior decorations, thus boosting the overall safety of aviation vehicles.

Pre-oxidized silk knitted fabric can be used in the new-energy vehicle industry to manufacture seat covers, headliners, door panel linings, and other components. In the event of an electrical fault or accidental ignition source, this fabric can effectively prevent flames from spreading, giving passengers valuable time to escape safely. Meanwhile, its corrosion-resistant and oil-resistant properties ensure long-term stability even in the challenging automotive environment.

3. Special Protection Field

Thanks to its excellent flame-retardant properties, thermal stability, and mechanical performance, preoxidized silk knitted fabric has become an important material for military equipment such as special operations uniforms and chemical protective suits. In the equipment field, preoxidized silk knitted fabric can be used for thermal insulation linings in armored vehicles and flame-retardant coatings for military cables, thereby enhancing the protection level and environmental adaptability of military equipment. Moreover, preoxidized silk knitted fabric can also be employed in the manufacture of military tents, camouflage nets, and other field facilities, providing troops with reliable conditions for field encampments.

4. Specialized Clothing and Equipment

The jumpsuit, hood, gloves, and other items made from pre-oxidized silk knitted fabric are close-fitting, breathable, and allow for unrestricted movement. While providing top-tier flame-retardant protection, these garments also prevent additional physical exertion and discomfort caused by stiffness or friction, enabling users to maintain peak performance even in extreme environments.

In the outdoor gear industry, preoxidized silk knitted fabric can be used to make inner linings for polar expedition tents and thermal insulation pads for high-performance racing cars.

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