CF6793 Basalt Roving Untwisted Strand

Basalt Roving Untwisted Strand Description

This advanced untwisted roving integrates continuous parallel basalt filaments (9–17 μm diameter) for maximum resin penetration and mechanical interlocking. Proprietary multi-resin silane sizing—including γ-glycidoxypropyltrimethoxysilane for epoxy systems—forms covalent Si-O-C bonds with thermoset matrices, achieving interfacial shear strength >45 MPa.

The amorphous mineral structure delivers exceptional thermal resilience, maintaining tensile integrity from –260°C to +700°C—critical for aerospace thermal cycling and phenolic curing at 180°C. With a tensile modulus of 91–100 GPa (25% higher than E-glass) and controlled elongation (2.8–3.3%), it prevents brittle fracture under dynamic loads.

Near-zero moisture absorption (<0.1%) eliminates hydrolysis risks in marine environments, with documented 80% strength retention after 7.5 years in seawater. Enhanced chemical resistance to acids/alkalis, self-extinguishing properties (LOI >75%), and ultra-low fuzz (≤10 mg/kg) enable snag-free weaving and rapid resin infusion (<60 seconds for epoxy). These synergies yield composites with 50% higher flexural modulus and 2× fatigue life versus glass equivalents, while reducing CO₂ footprint by 30%.

Basalt Roving Untwisted Strand Applications

Wind Energy Structural Components: High modulus (100 GPa) and fatigue resistance extend turbine blade lifespan in spar caps and root reinforcements.

Aerospace & Defense: Radar-transparent radomes leverage flame retardancy (LOI >75%) and FST compliance for aircraft interiors and missile housings.

Civil Infrastructure: Replaces steel rebar in bridge grid fabrics with 50% higher crack resistance and alkali/salt immunity. Fireproof tunnel cladding utilizes 700°C thermal stability with phenolic resins.

Marine Engineering: Hull laminates maintain 80% strength after 7.5 years in seawater. Offshore platforms achieve 3× service life versus glass fiber through UV/hydrolysis resistance.

High-Pressure Systems: Filament-wound CNG/H₂ storage tanks endure 700-bar cyclic pressures with minimal creep deformation.

Basalt Roving Untwisted Strand 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 Untwisted Strand FAQs

Q1. Why choose an untwisted structure?

Parallel filaments eliminate twist-induced stress concentrations, accelerating resin wet-out to under 60 seconds in epoxy systems while increasing interlaminar shear strength by 40% versus twisted rovings.

Q2. What are the key advantages versus glass fiber?

Delivers 25% higher tensile strength (0.68 N/tex vs. 0.45 N/tex for E-glass), extends thermal resistance by +300°C, triples seawater corrosion lifespan, and reduces carbon footprint by 30%.

Q3. Which resin systems are compatible?

Optimized for epoxy (60-second wet-out), vinyl ester (marine-grade bonding), and phenolic (fireproof applications). Proprietary silane sizing forms covalent Si-O-C bonds across all thermoset matrices.

Related Information

1.       Common Preparation Methods

Manufacturing begins with high-purity basalt ore (Fe₂O₃ <9.5%) that is crushed, magnetically separated, and washed to produce 5–20 mm granules. Granules melt in gas/electric furnaces (1,460–1,500°C) into homogeneous lava, drawn through platinum-rhodium alloy spinnerets (9–17 μm holes) into filaments solidified by air quenching to lock the amorphous structure.

Filaments pass through an aqueous sizing bath (60–80°C) coated with epoxy/phenolic-specific silane (e.g., γ-glycidoxypropyltrimethoxysilane), achieving monofilament encapsulation via dip rollers. Fibers are gathered into untwisted rovings under micro-tension (15–25 N), with linear density calibrated to 600–4,800 Tex via bushing orifice count and winding speed control.

Rovings undergo infrared pre-drying (100–120°C) and thermal crosslinking in multi-zone ovens (130–150°C, 30–50 min) to activate resin-bonding sites. Laser diameter checks (±0.5 μm tolerance) and electrostatic monitoring ensure quality before winding onto perforated bobbins (nitrogen atmosphere). Final packaging uses moisture-barrier aluminum film for 12-month shelf stability.