CF6790 Basalt Roving for Thermoplastics Reinforcing

Basalt Roving for Thermoplastics Reinforcing Description

This high-performance untwisted roving is engineered for reinforcing polypropylene (PP), polyamide (PA6/PA66), PBT, and PPS thermoplastics. Continuous basalt filaments, precision-extruded to 10–16 μm diameters, enable optimal resin infiltration and stress distribution. A proprietary amino-functional silane coating (e.g., γ-aminopropyltriethoxysilane) covalently bonds with polymer functional groups, eliminating fiber pull-out while maximizing load transfer efficiency.

The volcanic mineral matrix delivers unparalleled thermal resilience, maintaining structural integrity from cryogenic (–260°C) to extreme heat (+680°C)—critical for surviving twin-screw extrusion at 280–320°C. With tensile strength of 0.62–0.68 N/tex and modulus of 90–96 GPa (surpassing E-glass by 25–30%), compounding at 20–40% loading elevates PP’s heat deflection temperature from 60°C to 155°C and boosts PA66 impact resistance by 80%.

Near-zero moisture absorption (<0.1%) prevents hydrolysis in hygroscopic resins, while innate resistance to acids, alkalis, and UV radiation ensures longevity in corrosive environments. Electrically insulating (>25 kV/mm) and inherently flame-retardant, the roving suppresses arc tracking in electrical housings. Optimized filament geometry and anti-static additives enable tangle-free unwinding during compounding, with thermal-stable sizing preventing volatile emissions or nozzle clogging.

Basalt Roving for Thermoplastics Reinforcing Applications

Automotive Structural Components: Replaces metal in bumper beams and EV battery trays, achieving 25–30% weight reduction while meeting crash standards. Thermal stability (–260°C to +680°C) and UL94 V-0 compliance enable under-hood use in motor housings.

High-Voltage Electrical Systems: Amino-silane sizing ensures dielectric strength (>25 kV/mm) for circuit breakers and 5G antenna housings. Dimensional stability at >150°C maintains precision in LED heat sinks and server chassis.

Corrosion-Resistant Industrial Equipment: Chemical inertness reinforces acid piping and hydraulic valves. Hydrolysis resistance (<0.1% moisture uptake) extends gearbox housing life in humid environments, with 70% higher fatigue life than glass fiber.

High-Impact Consumer Goods: Enhances power tool housings with 80% higher impact strength versus unreinforced PP/PA. UV stability ensures durability in outdoor furniture and bicycle frames.

Sustainable Advanced Applications: FST-compliant aerospace panels, sterilizable medical trays, and vibration-damped wind turbine gears—leveraging 30% lower CO₂ footprint and recyclability via pyrolysis.

Basalt Roving for Thermoplastics Reinforcing Packaging

Our products are packaged in customized cartons of various sizes based on the material dimensions. Small items are securely packed in PP boxes, while larger items are placed in custom wooden crates. We ensure strict adherence to packaging customization and the use of appropriate cushioning materials to provide optimal protection during transportation.

Packaging: Carton, Wooden Box, or Customized.

Kindly review the packaging details provided for your reference.

Manufacturing Process

1.       Testing Method

(1)    Chemical Composition Analysis - Verified using techniques such as GDMS or XRF to ensure compliance with purity requirements.

(2)    Mechanical Properties Testing - Includes tensile strength, yield strength, and elongation tests to assess material performance.

(3)    Dimensional Inspection - Measures thickness, width, and length to ensure adherence to specified tolerances.

(4)    Surface Quality Inspection - Checks for defects such as scratches, cracks, or inclusions through visual and ultrasonic examination.

(5)    Hardness Testing - Determines material hardness to confirm uniformity and mechanical reliability.

Please refer to the SAM testing procedures for detailed information.

Basalt Roving for Thermoplastics Reinforcing FAQs

Q1. What is this basalt roving designed for?

This untwisted, silane-coated basalt roving is engineered to reinforce thermoplastics like polypropylene (PP), polyamide (PA6/PA66), PBT, and PPS via twin-screw extrusion. It enhances mechanical strength, thermal stability, and chemical resistance in final composites while enabling lightweight designs for automotive, electrical, and industrial applications.

Q2. Why choose basalt over glass fiber for thermoplastics?

Basalt offers superior tensile strength (0.62–0.68 N/tex vs. 0.35–0.45 N/tex for E-glass), higher thermal resistance (–260°C to +680°C), lower moisture absorption (<0.1%), and better chemical/UV stability. Its 30% lower CO₂ footprint and recyclability further support sustainability goals.

Q3. How does it perform in composite processing?

The amino-silane coating enables rapid dispersion during twin-screw extrusion (280–320°C), eliminating nozzle clogging while preserving fiber integrity. At 30% loading, composites exhibit 35–50% higher tensile strength, 70–90% increased flexural modulus, and HDT elevations up to 140°C (e.g., PP HDT reaches 155°C).

Related Information

1.       Common Preparation Methods

The production begins with meticulous selection of high-purity volcanic basalt rock, which undergoes crushing, washing, and magnetic separation to eliminate metallic impurities, yielding uniform 5–20 mm granules. These raw materials are fed into gas-fired or electric furnaces operating at 1,460–1,500°C, where basalt melts into a homogeneous, viscosity-controlled lava. The molten material flows into platinum-rhodium alloy bushings equipped with precisely calibrated nozzles (10–16 μm diameter), where it is drawn into continuous filaments under controlled tension and rapid air-quenching to solidify the amorphous microstructure essential for mechanical robustness.

Immediately after formation, filaments pass through an aqueous sizing bath containing a proprietary amino-functional silane formulation—typically γ-aminopropyltriethoxysilane (APS) blended with epoxy-modified silanes, thermoplastic film-formers, and antistatic agents. Applied at 70–85°C via immersion rollers, this coating uniformly encapsulates each filament to optimize chemical bonding with polypropylene (PP), polyamide (PA), and other thermoplastics while reducing friction during downstream processing. The sized filaments are gathered into parallel, untwisted bundles under micro-tension control, with linear density precisely adjusted between 1,200–4,800 Tex by modulating bushing throughput and winding speed.

Continuous rovings undergo infrared pre-drying (100–120°C) to remove surface moisture before being wound onto perforated polymer bobbins. These packages are transferred to conditioning chambers where the sizing undergoes partial crosslinking at 110–130°C for 1–2 hours, enhancing thermal stability for extrusion. Final quality verification includes laser-based filament diameter analysis, thermogravimetric sizing content checks (0.5–0.9 wt%), and resin wettability trials with molten PP/PA at 280°C. Rovings meeting tensile strength (>0.62 N/tex), moisture content (<0.1%), and fuzz-resistance standards (≤15 mg/kg) are packaged in aluminum-coated moisture-barrier bags under nitrogen purge, ensuring shelf-life stability for compounding with engineering thermoplastics in high-demand automotive, electrical, and industrial applications.