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PAN Fiber

Polyacrylonitrile (PAN) Fiber, commonly known as Acrylic Fiber, is a high-performance synthetic fiber produced through the polymerization of acrylonitrile monomers. Its manufacturing process involves dissolving PAN polymer into a spinning solution, which is then extruded and formed into fibers of precise diameters and lengths. Renowned for its exceptional mechanical properties and chemical stability, PAN Fiber has become a preferred reinforcement material in asphalt and cement concrete engineering, delivering significant improvements to composite performance.

Compared to other synthetic fibers, PAN Fiber boasts higher tensile strength, stiffer initial modulus, and more stable chemical resistance. These attributes endow it with excellent acid/alkali corrosion resistance, lightfastness, weatherability, and dispersion. In practical applications, it forms a strong bond with concrete matrices, enhancing concrete’s cohesion, fatigue resistance, impermeability, frost resistance, and impact resistance，making it indispensable in high-demand construction scenarios.

What are the key features of PAN fiber?

-High tenacity and low elongation for stable reinforcement

-Excellent abrasion resistance for long service life

-Strong resistance to chemicals, UV radiation, and weathering

-Good thermal conductivity and low flammability

-Outstanding strength-to-weight ratio

-Superior dimensional stability under temperature changes

-Better insulation and flexibility than traditional fibers

-Easy to handle, mix, and maintain

-Cost-effective and durable for large-scale projects

Technical Data:

What are the advantages and benefits of PAN fiber?

-Superior Mechanical Reinforcement: Higher tensile strength (≥640MPa) and elastic modulus than PP/PE fibers, effectively controlling concrete cracks and improving load-bearing capacity.

-Exceptional Environmental Durability: Resists UV radiation, extreme temperatures, and chemical corrosion—maintains performance in coastal, industrial, and severe cold regions.

-Strong Matrix Bonding: Fine fiber diameter (11±2μm) and rough surface enhance interfacial adhesion with concrete/asphalt, ensuring uniform stress transfer.

-Cost-Efficient Engineering: Reduces concrete maintenance costs by 30%+; lightweight (1/7 the density of steel) lowers transportation and construction labor costs.

-Versatile Compatibility: Works seamlessly with asphalt, cement, and common admixtures; suitable for both new construction and old structure repairs.

-Enhanced Composite Performance: Significantly boosts concrete’s impermeability (reduces water penetration by 40%) and frost resistance (endures 300+ freeze-thaw cycles).

Is there any recommended dosage for PAN fiber?

Dosage of PAN fiber varies by application type, with the following guidelines for reference:

-Asphalt concrete (pavements/repairs): 0.3-0.5kg per cubic meter

-Cement concrete (pavements/bridge decks): 0.6-0.9kg per cubic meter

-High-performance concrete (waterproof structures): 1.0-1.2kg per cubic meter

-Note: Consult our technical team for dosage adjustment based on concrete grade and project requirements.

How to mix PAN fiber? 

1.Add aggregates (sand, stone) and PAN Fiber into the mixer first.

2.Dry mix for 1-2 minutes to ensure full fiber dispersion (avoid agglomeration).

3.Add cement, water, and admixtures, then wet mix for 2-3 minutes until uniform.

4.For asphalt mixing: Add fiber during the aggregate drying stage (160-180℃) and mix for 30 seconds before adding asphalt.

What applications is PAN fiber utilized for? 

1. Asphalt Concrete Engineering

-New asphalt pavement surfaces and old pavement overlays

-Asphalt pavement repair and cold patch materials

-Asphalt irrigation joints and rigid frame bridge deck pavements

2. Cement Concrete Engineering

-Concrete precast slabs and cement products

-Cement concrete pavements, bridge decks, and airport runways

-Highway anti-collision walls and impact-resistant baffles

3. Special Environment Projects

-Ports, deep-water wharves, and severe cold region constructions

-Water storage pools, swimming pools, and sewage treatment pools

-Face-slab dams for water conservancy projects

-Waterproof structures: Basement side walls, floors, and roofs

How to store and handle PAN fiber? 

PAN fiber should be stored properly to keep its properties and performance.

-Store in a clean, dry, and well-ventilated warehouse with temperature 15-25℃ and relative humidity 40%-60%.

-Avoid direct sunlight, rain, and high-temperature environments (＞50℃) to prevent fiber aging.

-Keep away from strong acids, alkalis, and oxidants to avoid chemical degradation.

-Seal the packaging after partial use. Shelf life is 24 months under proper storage conditions.

-Stack no more than 6 layers to prevent packaging deformation and fiber agglomeration.

FAQ

Question 1: Is PAN Fiber suitable for all construction projects?

A1: It fits most concrete/asphalt projects, including high-rises, bridges, pavements, and tunnels. For ultra-high-load structures, combine it with steel reinforcement.

Question 2: How to confirm the right dosage of PAN fiber for my project?

A2: Use our recommended dosage as a base. For key projects, provide concrete grade and application scenarios to our technical team for a customized plan.

Question 3: Can PAN fiber be used in cold weather?

A3: Yes. PAN fiber improves concrete’s frost resistance, making it ideal for regions with frequent freeze-thaw cycles. Increase dosage by 0.1-0.2kg/m³ in -20℃ environments.

Q4: Does PAN fiber affect concrete’s appearance?

A4: Yes. Its fine diameter ensures uniform dispersion, creating a smoother surface and reducing blemishes like shrinkage cracks.

Q5: Is PAN Fiber environmentally friendly?

A5: Yes. It’s made from recyclable materials, requires 50% less energy to produce than steel, and causes no environmental pollution.

Q6: How to check if PAN fiber is well-dispersed?

A6: Observe fresh concrete. No clumps mean good dispersion. For hardened concrete, cut a sample and check for uniform fiber distribution under a magnifying glass.

Q7: What’s the difference between PAN Fiber and PP Fiber?

A7: PAN has higher strength, better high-temperature resistance (melting point ＞240℃ vs. 160℃ for PP), and is more suitable for high-demand projects like airports and bridges.

Q8: Can PAN fiber be mixed with other fibers?

A8: Yes. Mixing with PP macro fibers (1:1 ratio) can simultaneously control micro-cracks and macro-cracks for better performance.