Kevlar Round Tubes (KFRP Round Tube) — Aramid Fiber Wound · Ultra-Tough Impact Resistance · Lightweight Ballistic-Grade
1. Product Definition
Kevlar Round Tubes are hollow cylindrical profiles reinforced primarily with DuPont™ Kevlar® 29/49 or equivalent aramid fibers. These fibers are impregnated with high-strength epoxy or vinyl ester resin and cured via continuous filament winding or pultrusion-winding composite processes. With a density of only 1.44 g/cm³ and up to five times the specific strength of steel, they offer exceptional impact resistance, delamination resistance, and thermal durability from −170 °C to +250 °C. Ideal for applications requiring ballistic protection, explosion resistance, vibration dampening, and lightweight structural integrity.
2. Key Advantages
- Ultra-High Toughness: With an elongation at break of 3–4%, they absorb 3–4× more impact energy than equivalent carbon fiber tubes.
- Thermal Stability: Operates reliably at 200 °C long-term and retains 80% strength at 250 °C for short durations.
- EM-Safe & Insulated: Non-magnetic and electrically insulating—ideal for MRI, radar, and naval applications.
- Superior Durability: Resists cutting, corrosion, salt spray, sea water, and organic solvents.
- Custom Strength Design: Adjustable fiber winding angle from 15° to 75° for optimized axial or hoop strength.
3. Technical Specifications
| Property | Typical Value |
|---|---|
| Density | 1.44 g/cm³ |
| Tensile Strength | 2,000–2,600 MPa |
| Elastic Modulus | 60–80 GPa |
| Interlaminar Shear Strength | 45–55 MPa |
| Service Temperature | −170 °C to +250 °C |
| Elongation at Break | 3–4% |
4. Common Stock Sizes (Wall Thickness: 1.5 mm; Standard Length: 1000 mm; Custom Length: up to 3000 mm)
| Outer Ø (mm) | Inner Ø (mm) | Weight (g/m) | Typical Applications |
|---|---|---|---|
| 6 | 3 | 50 | Fiber optic sleeves, medical catheter casing |
| 8 | 5 | 75 | Military antenna housing |
| 10 | 7 | 100 | Robotic cable sleeves |
| 12 | 9 | 125 | Tactical batons |
| 16 | 13 | 165 | Bulletproof helmet rings |
| 20 | 17 | 210 | Marine railings, ski poles |
| 25 | 21 | 270 | Explosion-resistant robotic arms |
| 30 | 26 | 330 | UAV landing gears |
| 40 | 36 | 450 | Automotive roll cage liners |
| 50 | 45 | 570 | Armored vehicle energy beams |
Customization Scope: Outer Ø: 4–120 mm; Wall thickness: 0.8–5 mm; Length: up to 3 m; Threaded metal inserts (aluminum/titanium) available.
5. Secondary Machining & Finishing
- End Machining: Chamfering, M3–M12 thread tapping, stainless steel nut inserts.
- Surface Options: Natural yellow, black epoxy coating, camouflage water transfer, glow-in-the-dark paint.
- Connector Accessories: Quick clamps, flanges, rotary joints, rubber sleeves.
6. Application Scenarios
- Ballistic & Blast Protection: Armored vehicle beams, helmet frames, riot shield supports.
- Medical Imaging: MRI-compatible bed rails, catheter sheaths, collapsible stretcher poles.
- Industrial Safety: Impact bars for robotic arms, reinforced layers in high-pressure hoses.
- Outdoor Sports: Ski poles, trekking poles, kayak paddles.
- Marine & Aerospace: Naval railings, AUV buoyancy rods, UAV collision guards.
7. Ordering & Delivery
- In Stock: MOQ 1 unit; ships within 24h.
- Custom Orders: MOQ 20 units; lead time 7–10 days.
- Packaging: Protective film → EPE foam → reinforced carton; wood crate pallet for items ≥2 m.
- Certifications: Supplied with material batch report, RoHS, REACH, ISO 9001.
Offline Contracts
All sales of our carbon fiber materials are conducted through offline contract agreements to ensure each order precisely meets your specifications, compliance requirements, and agreed payment terms. Please contact our sales team to initiate the contract process and discuss project details.
| name | value | unitCode | unitText |
|---|---|---|---|
| MOQ | 50 | PCS | |
| Lead Time | 5–20 | business days | |
| Material | Kevlar® 29 / Kevlar® 49 (Aramid Fiber) | ||
| Size | Customizable (inner diameter / outer diameter / length) |
Resources
Kevlar Round Tubes — Redefine structural design with strength as tough as steel and light as air.
