7 Micron Fine Filament Basalt Twisted Yarn Coated with Silane Coupling Agent for

Product Specification

7 Micron Fine Filament Basalt Twisted Yarn Coated with Silane Coupling Agent for Improved Resin Wet-out in Filament Winding of High Pressure Composite Storage Tanks and Pipes

Our 7 micron fine filament basalt twisted yarn coated with silane coupling agent is specifically engineered for improved resin wet-out in filament winding of high-pressure composite storage tanks and pipes. Produced from 100% natural volcanic basalt rock, this advanced yarn combines an ultra-fine 7 µm filament diameter with a precision twisted construction and a silane-based sizing system to deliver superior fiber-matrix adhesion, uniform impregnation, and consistent processing performance.

The silane coupling agent forms a chemical bridge between the inorganic basalt surface and organic resin systems such as epoxy, vinyl ester, and unsaturated polyester. This significantly improves resin wet-out, reduces void content, and enhances the mechanical performance and long-term durability of filament-wound composite structures.

Whether you are manufacturing CNG tanks, hydrogen pressure vessels, LPG cylinders, SCBA tanks, or high-pressure composite pipes, this yarn provides the strength, reliability, and processability required for demanding structural applications.

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Key Features

Feature Benefit
7 µm Fine Filament High specific surface area for faster and more uniform resin wet-out
Silane Coupling Agent Strong chemical bonding between basalt fiber and resin matrix
Improved Resin Wet-Out Reduced voids, better fiber impregnation, higher composite quality
Twisted Yarn Construction Excellent yarn integrity, reduced fuzzing, uniform tension during winding
High Mechanical Strength Tensile strength ≥ 4,000 MPa, modulus 85–90 GPa
Superior Fatigue Resistance Withstands repeated pressure cycles in high-pressure vessels
Excellent Chemical Resistance Resists acids, alkalis, salts, and solvents
Low Moisture Absorption ≤ 0.1%, ensuring stable processing and long-term performance
Thermal Stability Continuous service from -260°C to +700°C; short-term peaks up to 980°C
Eco-Friendly Natural mineral composition, no asbestos, fully recyclable

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Technical Specifications

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Industrial Textile Applications

Thanks to its 5‑micron fineness and twisted structure, this yarn excels in:

· High‑temperature filtration fabrics – fine mesh with lower pressure drop

· Fire‑retardant curtains and welding blankets – lightweight yet protective

· Reinforcement for composite prepregs – improved resin wet‑out

· Braided sleeving and cable insulation – flexible and crush‑resistant

· Sealing and gasket materials – excellent compressibility

· Aerospace interior textiles – non‑combustible and low smoke emission

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Why Choose Our 5‑Micron Twisted Yarn?

Advantage Benefit

Finer than standard Enables thinner, lighter fabrics without sacrificing strength

Twisted for processability Reduces fuzzing and breakage during high‑speed weaving/knitting

Pure basalt – no additives Fully recyclable and non‑toxic, safer than asbestos and fiberglass

Consistent quality Strict diameter and twist uniformity (deviation < 5%)

Cost‑effective Lower price than carbon or ceramic fibers, with comparable thermal performance

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Conclusion

Our 5‑Micron Basalt Fiber Twisted Yarn redefines what basalt can do for industrial textiles. The combination of ultra‑fine filaments and engineered twist delivers a yarn that is not only heat‑stable and chemically robust but also textile‑friendly – allowing you to weave, braid, or knit with confidence. Whether you are producing fire‑safe protective clothing, high‑efficiency filter bags, or advanced composite reinforcements, this yarn offers the precision and performance your application demands.

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Specifications:

Other specifications are available for customization.

• Mechanical properties for basalt fiber produced by Pasia