About Aramid | Kevlar® Rope
Aramid braided ropes are made of aramid filament fiber. Aramid fiber has excellent strength. By this measure of its tensile strength to weight ratio, is 6 times than steel wire, 3 times as stronger as fiberglass, 2 times stronger than high-strength nylon fiber. And the tensile modulus is 3 times stronger than steel wire, is 2 times as stronger as the fiberglass, is 10 times more than high-strength nylon fiber. Aramid has an extremely wide range of continuous use temperature, it can long term operation in the range of -196°C to 340 °C. The shrinkage is 0 in the 150°C and it does not decompose and melting at the temperature of 560°C.
Aramid rope has many excellent properties: fireproof, flame retardant, high temperature resistant, abrasion resistant, cut resistant, high strength, low elongation, insulation, and dielectric properties.
Physical: Instantaneous temperature of 585°C, long time working temperature is 260°C-330°C
Mechanical: 3% breaking strength, Intensity 2.8Gpa
Applications of Aramid | Kevlar® Rope
Aramid ropes are widely used in many special requirement areas such as engineering cable, slings, safety ropes, aerial work rope, lead rope, paragliding rope, water-skiing tow rope, marine rescue rope, transport lifting rope, cut resistant rope, abrasion resistant rope, flame retardant rope, high temperature resistant rope, chemical resistant rope and other special requirement rope.
Define: Kevlar® & Nomex® Fiber
These two brands are belong to DuPontTM. They are most used ARAMID material, which Kevlar® is para-aramid and always has a natural color of yellow, on the other hand, Nomex® is meta-aramid and has a natural color of white.
Kevlar® has successfully emerged out as one of the ultra high-performance fiber since it’s been first introduced by Stephanie Kwolek on 1971, and was registered by DuPont as a famous para-aramid material commercial brand. This magic fiber has various amazing features: long-term working in high-temperature environment, high tensile load, low elongation.
Advanced Properties of Kevlar® | Para-Aramid fiber
High strength to weight ratio
Low elongation to break
Low thermal shrinkage
Good heat & flame resistance
Self-extinguishing flame retardant properties
Good chemical resistance
Excellent bulletproof/ballistic properties
High cut resistance (not so easy to cut off than normal fibers)
UV resistance good (ONLY on black and other non-natural color fiber)
UV resistance poor (natural, and please notice this is the MAIN WEAKNESS of aramid fiber)
Common Types & Deniers
T-29: Standard Modulus
T-49: High Modulus
AP: 15% higher tenacity than T-29
KM2: Optimized ballistic resistance
Deniers: 200, 380, 400, 750, 800, 1000, 1420, 2160, 2250, 2840, 3000, 7100
Advanced Properties of Nomex® | Meta-Aramid fiber
Lower elongation to break
the 4th level of dye colorfastness, dyeable
Low thermal shrinkage
Excellent heat & flame resistance
Self-extinguishing flame retardant properties
Soft-hand yields good textile properties
High chemical resistance
Common Types & Deniers
T-430: Filament Yarn
Deniers: 200, 1200, 1600, 2400
Twisted Rope is another choice besides braided rope.
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