Aramid 1414 + pre-oxidized fiber blended composite aramid 1313 felt used to manufacture fire helmets and racing suits' heat-insulating lining

Para-aramid 1414 and pre-oxidized fiber blended composite para-aramid 1313 felt

The felt is made of a composite of para-aramid 1414 (para-aramid), pre-oxidized fiber, and meta-aramid 1313 (meta-aramid). It is a special composite heat-insulating, flame-retardant, and wear-resistant material that combines the advantages of three high-performance fibers. Through a reasonable blending ratio and processing technology (such as needle punching, hydroentangling, and hot pressing), this composite material can achieve complementary performance and synergistic enhancement.

1. High Temperature Resistance and Flame Retardancy

Aramid 1313: Provides basic and excellent flame retardancy (LOI >28%), high temperature resistance (continuous use temperature of about 220°C, short-term up to 300°C or more), and self-extinguishing properties.

Pre-oxidized fiber: Starts to further carbonize at higher temperatures (usually >250°C), forming a denser, better heat-insulating carbonized layer barrier, significantly improving the material's protection ability under higher temperatures or long-term thermal radiation (long-term temperature resistance 200-300℃, instantaneous temperature resistance 1000℃). Its carbonization process is an active heat absorption process, enhancing the flame retardant effect.

Aramid 1414: Although its high-temperature resistance is slightly lower than 1313 (continuous use temperature of about 160-180°C), its extremely high strength and modulus provide structural support at high temperatures in the composite structure, preventing the material from excessive shrinkage, deformation, or collapse at high temperatures, maintaining overall integrity.

Composite effect: The three work together to give the felt a very wide temperature adaptability range (from room temperature to 600°C for a short time) and excellent fire prevention and heat insulation barrier performance. The flame retardancy meets stringent fire safety standards.

2. Excellent Thermal Insulation Performance

The felt structure itself has abundant pores, which can effectively block heat transfer (reducing heat conduction and convection).

The carbonized layer formed by pre-oxidized fiber at high temperatures has a very low thermal conductivity and is a highly efficient thermal barrier.

Aramid fiber itself is also a low thermal conductivity material.

Composite effect: This combination of structure and material provides low thermal conductivity, low thermal convection, and a high-temperature thermal radiation barrier, with overall thermal insulation performance far exceeding that of single-component materials.

3. Excellent Mechanical Strength and Wear Resistance

Aramid 1414: Contributes high tensile strength, tear strength, and modulus, significantly improving the overall tensile, tear, and puncture resistance of the felt, making it less prone to damage.

Aramid 1314 & Pre-oxidized fiber: Also have a certain degree of strength and wear resistance.

Composite effect: The felt has good dimensional stability, crispness, and wear resistance, and can withstand a certain amount of mechanical stress and friction, extending its service life. The addition of 1414 is a key advantage that distinguishes it from pure 1313 or pure pre-oxidized fiber felt (higher strength).

4. Good Chemical Stability

Aramid 1414 and 1313 have good tolerance to most organic solvents, oils, and weak acids and bases.

Pre-oxidized fiber also has good chemical inertness.

Composite effect: The felt can maintain stable performance and corrosion resistance in various industrial environments.

5. Low Smoke and Non-toxic

When aramid and pre-oxidized fiber decompose or burn at high temperatures, the amount of smoke and toxic gases produced is relatively low, meeting environmental protection and safety requirements.

6. Good Processability and Designability

By adjusting the ratio of the three fibers, the gram weight, thickness, density, and composite process (such as surface coating, coating, lamination, etc.) of the felt, the performance of the final product (such as focusing on heat insulation, strength, softness, and sealing) can be precisely controlled to meet the needs of different application scenarios.

Application Areas

Para-aramid 1414 + pre-oxidized fiber + para-aramid 1313 blended composite felt is a high-performance, multifunctional composite material. It integrates the high strength of para-aramid 1414, the excellent flame retardancy and heat resistance of para-aramid 1314, and the carbonization heat insulation barrier effect of pre-oxidized fiber at extremely high temperatures. Its core advantage lies in providing good heat insulation, fire protection, and structural integrity assurance in a wide temperature range (especially good at medium to high temperatures). This material has important application value in new energy (battery fire prevention and heat insulation), high-end industrial equipment, fire protection, special protective clothing, and transportation, and is one of the key materials for solving high-temperature and fire safety challenges.

1. High-Temperature Industrial Insulation

Insulation or sealing gaskets for high-temperature equipment such as pipelines, valves, reactors, ovens, and kilns.

Insulation curtains and protective blankets in hot working areas such as welding and casting.

Heat shields, sound insulation shields, and seals for automotive, aviation, and marine power systems such as engine compartments, exhaust pipes, and turbochargers.

2. Fire Prevention and Fire Fighting

Core heat-insulating filling layer for fire doors and fire-resistant rolling doors.

Fire-blocking material for building gaps and pipe penetration holes.

Heat insulation layer for fire suits (needs to be combined with other functional layers).

Heat insulation material for escape blankets and emergency shelters.

3. Personal Protective Equipment

Heat-insulating lining or outer layer for high-level flame-retardant work clothes, welder's clothing, and furnace worker's clothing (providing heat insulation, flame retardancy, and a certain degree of resistance to sparks and molten drops).

Core material for high-temperature resistant gloves, aprons, and sleeves.

Heat-insulating lining for fire helmets and racing suits.

4. Transportation
Fire-resistant partitions, seat fire-resistant layers, and interior heat-insulating layers for high-speed rail, subways, and aircraft.

Fire-retardant and heat-insulating shields, fire blankets, and cell-separating thermal films for new energy vehicle battery packs (key materials for preventing the spread of thermal runaway). This is a very popular application area currently.

Heat-insulating and noise-reducing materials for the engine compartment of a vehicle.

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