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Aramid pulp is manufactured by cutting aramid filaments to a specific length, distributing the shredded fiber in water to produce suspending liquid, beating the suspending liquid, and dehydrating and drying the fluid.

Aramid pulp is not a naturally occurring pulp like wood or cotton but an engineered product designed to combine the exceptional properties of aramid fibers (high strength, heat resistance) with an extremely high surface area and a "fluffy," low-density morphology.

Because of its unique morphology, aramid pulp behaves similarly to cellulose pulp，yet provides exceptionally higher strength, temperature resistance, and chemical stability. 

Aramid pulp is commonly used as a reinforcing material in friction materials, sealing products, composites, and specialty papers.

What are the key features of aramid pulp?

Excellent toughness, light weight: About 1.44 g/cm³ for para-aramid, 1.38 g/cm³ for meta-aramid, leading to lightweight composites.

High strength and high modulus

Resistance to high temperature: Inherits exceptional heat resistance from its parent aramid, with continuous use temperatures often exceeding 200°C and very low flammability.

Good chemical Resistance: Generally resistant to most organic solvents, fuels, and oils (specific resistance varies between meta- and para- types).

Electrical insulation, low thermal expansion coefficient: Excellent dielectric properties, especially in dry conditions.

Environmentally friendly and harmless

No melting point, degradation starts from 500°C

High Surface Area: The fibrillation process creates an enormous specific surface area (typically 7-12 m²/g), which is critical for bonding with matrices.

How many types of aramid pulp are there?

Para-aramid pulp, (also called Aramid 1414) is the mainstream variant, processed from high-performance para-aramid filaments. Its production emphasizes fibrillation control—a key step that creates micro-fibrils on fiber surfaces, enhancing adhesion with rubber/resin matrices .

Meta-Aramid Pulp is characterized by excellent thermal stability, inherent flame resistance (self-extinguishing), strong electrical insulation, and good chemical resistance to many acids and weak alkalis. It has a lower modulus (more flexible) than para-aramid.

Technical Data:

What are the advantages and benefits of aramid pulp?

Reinforcement Efficiency: Superior to staple fibers due to high surface area and mechanical interlocking.

Matrix Compatibility: Disperses well in water, solvents, resins, and elastomers.

Multi-Functional Additive: Provides not just reinforcement, but also rheology control, wear resistance, and thermal/electrical insulation.

Dosage Efficiency: Low addition levels (1-10% by weight) often yield significant performance improvements.

Low Abrasiveness: Softer on processing equipment than mineral fillers like glass fibers.

Non-Melting: Provides dimensional stability at high temperatures.

What are the applications of aramid pulp? 

Friction materials, such as brake pads, linings, grip surface, and clutch facings.

Sealing materials: Compression packings, sheet gaskets, valve stem seals.

Composite reinforcement: In engineering plastics (nylon, PBT), thermoplastic elastomers (TPU), and rubber (NBR, EPDM).

Adhesives & Sealants: High-performance epoxy, polyurethane, and silicone formulations.

Specialty Papers & Nonwovens: Battery separator papers (for high-temperature Li-ion/Sodium cells), electrical insulation papers, heat protective barriers.

Coatings: Abrasion-resistant and insulating coatings.

How to ship, store and handle aramid pulp? 

The aramid products should be kept in its original packaging in a dry, clean, cold place. and well-ventilated area. Avoid direct sunlight, heat sources, and high humidity. 

Best condition is at temperature from 15 to 35°C and Humidity between 35 to 65% to ensure safety and quality.

While not classified as a severe health hazard, it is a respirable fiber. Use appropriate personal protective equipment (PPE), such as dust mask, safety glasses, gloves and long sleeves.

FAQ

Question 1: What are its advantages compared to steel and fiberglass?

A: The strength of aramid can reach up to above 28g/D. 5-6times of steel and glass regarding the strength. The modulus is 2-3 times of steel and glass. The flexibility is 2 times of steel and glass, but the weight is only 1/5.

Question 2: What is its temperature resistance? 

A: Our aramid pulp can be used continuously in a very wide temperature range from -200°C to 350°C. It has no decomposing or melting at 500°C. 

Question 3: What will you do if I am not comfortable with the filament length or surface area?

A: That is not a problem at all. We can adjust our processes to meet your requirements.

Question 4: How is the package?

A: 5kgs a bag for regular packing. Specific requirements can be met upon request.

Question 5: What's the main difference between aramid pulp and aramid chopped fiber?

A: Chopped fibers are short, discrete cylinders (like tiny rods). Pulp is fibrillated, creating a hairy, networked structure with orders of magnitude more surface area. Pulp provides better matrix bonding, rheology control, and reinforcement efficiency at low dosages, while chopped fiber is better for bulk, flowable reinforcement.

Question 6 : How does it compare to carbon fiber pulp?

A: Aramid pulp offers 2x better flexibility and 30% lower density than carbon fiber pulp, with superior chemical resistance. Aramid pulp is ideal for wet-processed products like gaskets .

Question 7: Can aramid pulp fully replace asbestos?

A: Yes, aramid pulp is one of the premier high-performance replacements, especially in friction and sealing applications, offering superior thermal stability and non-carcinogenic safety.

Question 8: Is aramid pulp difficult to disperse?

A: Aramid pulp can form clumps if added improperly. The Best practice is to add aramid pulp slowly to the vortex of a rapidly stirring liquid medium under high shear. Pre-wetting or using dispersing agents is often recommended.

Question 9: Meta or Para? Which should I choose? What is the difference between meta aramid pulp and para aramid pulp?

A: Meta-Aramid Pulp: Prioritize for exceptional long-term thermal and electrical insulation, inherent flame resistance, and acid resistance (e.g., hot gas filtration, electrical papers, acid-resistant gaskets).

Para-Aramid Pulp: Prioritize for maximum mechanical reinforcement, cut & abrasion resistance, and modulus (e.g., high-performance brake pads, demanding rubber seals, cut-resistant composites).