Easy Mixing Basalt Chopped Fibers Strands Fabrics for Bulk Molding Compound and Sheet Molding Compound

Easy Mixing Basalt Chopped Fibers for Bulk Molding Compound and Sheet Molding Compound 

Our Easy Mixing Basalt Chopped Fibers are precision-engineered short-cut reinforcement strands specifically designed for Bulk Molding Compound (BMC) and Sheet Molding Compound (SMC) applications. Manufactured from natural volcanic basalt rock melted at approximately 1450–1500°C and drawn into continuous filaments, these fibers are then precisely cut to controlled lengths and coated with a silane-based sizing agent.

The defining feature of this product is its exceptional ease of mixing and dispersion—a critical requirement for high-speed BMC/SMC compounding processes where uniform fiber distribution directly impacts final part quality, production efficiency, and material consistency.

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The Challenge: Dispersion in BMC/SMC Compounding

In BMC and SMC production, reinforcing fibers must be uniformly dispersed throughout a highly viscous resin paste containing fillers, catalysts, and additives. Poor dispersion leads to:

· Fiber agglomerates – causing stress concentrations and part failure
· Inconsistent mechanical properties – reducing structural reliability
· Extended mixing cycles – increasing energy costs and reducing throughput
· Surface defects – compromising aesthetic quality of molded parts

Our Easy Mixing Basalt Chopped Fibers are specifically formulated to overcome these challenges.

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Key Features & Benefits for BMC/SMC

1. Superior Dispersion & Mixability
Our fibers feature a surface-ribbed, needle-shaped morphology that promotes excellent separation and uniform distribution throughout the resin matrix. Combined with optimized silane sizing, this ensures even dispersion during stirring and uniform dispersion with low fuzz and static, eliminating fiber agglomerates and ensuring homogeneous reinforcement across every batch.

2. Fast Wet-Out & Resin Compatibility
The proprietary silane sizing system ensures rapid wet-out and strong interfacial adhesion with a wide range of thermosetting resin systems, including:

· Unsaturated polyester resins
· Vinyl ester resins
· Epoxy resins
· Phenolic resins

3. Low Fuzz & Excellent Static Control
Engineered for clean processing with low fuzz generation and good static control, our fibers enable high line speeds, reduce downtime for cleanup, and minimize waste in high-volume production environments.

4. Consistent Chopped Length Retention
Our fibers maintain excellent chop length retention during mixing, ensuring that the designed fiber length is preserved throughout the compounding process—critical for achieving target mechanical properties in the final molded part.

5. High Tensile Strength & Modulus

· Tensile strength: ≥1200 MPa (up to 3800 MPa for single filaments)
· Elastic modulus: 65–95 GPa
· Elongation at break: 2.5–3.2%

6. Thermal Stability & Flame Retardancy
Serviceable from -260°C to 700°C with UL94 V-0 flame resistance—far exceeding the thermal performance of E-glass fibers.

 
Pasia Industries offers a special type of basalt chopped fiber, compatible with various general purpose resin systems such as epoxy, phenolic, vinyl ester and polyester. Basalt chopped strands are mainly recommended for the manufacturing of friction materials, reinforcing concrete and bitumen, BMC or SMC material, making chopped strand mat, needle mat, etc Special sizing formulas can also be provided for other application requirements.
 
General Specifications

 
Increasing performance of friction material:
 
Basalt fiber is an eco-friendly, high-performance reinforcement for friction materials (brake pads, clutches), offering superior wear resistance, thermal stability, and low noise compared to asbestos or steel. Its high-temperature resistance and stable friction coefficient make it an ideal, sustainable alternative for enhancing frictional performance and durability in automotive applications.
 
Key Advantages in Friction Materials:
High Thermal Stability: Basalt fibers maintain structural integrity at high temperatures, reducing thermal fade in braking systems.
Superior Wear Resistance: Studies show basalt fiber-reinforced materials offer better wear resistance than asbestos, steel, and glass fibers.
Improved Frictional Stability: Basalt fiber reduces friction fluctuations, providing consistent performance.
Environmental Friendly: As a natural volcanic rock product, it provides a green, non-toxic, and non-corrosive alternative to traditional fiber reinforcement.
Enhanced Mechanical Strength: It increases the tensile strength and modulus of organic brake pads.
 
Applications and Performance:
Brake Pads: Used to improve friction stability and reduce noise.
Clutch Facings: Provides durability under high-stress conditions.
Optimal Properties: Research indicates that using 10 mm length fiber at appropriate content levels yields the best reinforcement for friction composites.
 
Basalt fiber's ability to withstand high temperatures (up to 900 ℃ in some cases) without losing strength ensures it is highly effective in demanding braking environments.
 
 
Concrete improvement
 
Compared with different types of reinforcing fibers, Pasia Basalt fibers have achieved the best overall technical and economic benefits in fiber-reinforced concrete and maintain a leading position among natural mineral fibers. They are made from short-cut basalt fibers produced by our company. Tests conducted by international research centers and the application effects of the products in actual projects have both confirmed this.
 
Basalt chopped strands are essential products for:
Eliminate large concrete surface cracks;
Make reinforced concrete structures achieve stability and toughness when bearing different loads;
Reduce the backflow during shotcrete application;
Improve the wear resistance of the concrete surface;
Enhance the frost resistance and waterproof performance;
And accelerate the drying process of large concrete blocks.