Description
Polyester 3-Strand Rope is a twisted synthetic rope made from high-tenacity polyester fibers, offering excellent strength, abrasion resistance, and durability. Its traditional 3-strand construction gives it a classic look and proven functionality, while its material composition ensures superior performance in harsh environments, especially in marine and industrial settings.
Designed to resist UV degradation, water absorption, and stretching under load, this rope is a trusted solution for applications requiring long-term outdoor exposure, secure load handling, and minimal elongation.
Construction and Material
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Type: 3-strand twisted rope (a.k.a. laid rope)
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Material: 100% high-tenacity polyester fibers
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Appearance: Smooth, slightly glossy, typically white or custom-colored
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Lay: Right-hand lay (standard), soft to medium lay for flexibility
The 3-strand twist offers excellent abrasion resistance and makes this rope easy to splice while maintaining a firm grip in hardware and knots.
Key Performance Features
High Strength
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Engineered for durability under load
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Maintains tensile strength when wet
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Resistant to stretching under tension
Low Stretch
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Offers minimal elongation (~3–5% at working loads)
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Ideal for applications requiring precision and stability
UV and Weather Resistant
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Superior resistance to ultraviolet rays
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Won’t weaken or degrade under sun exposure
Abrasion and Wear Resistance
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Withstands contact with hardware, pulleys, and rough surfaces
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Maintains integrity even under repeated friction
Moisture and Chemical Resistance
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Low water absorption (~0.5%)
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Resistant to rot, mildew, oils, and many chemicals
User-Friendly Handling
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Soft hand feel for easier coiling, knotting, and splicing
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Doesn’t harden or kink over time
Technical Specifications
| Diameter | Breaking Strength | Working Load (5:1 SF) | Weight (lbs/100 ft) |
|---|---|---|---|
| 1/4″ (6 mm) | ~1,800–2,000 lbs | ~360–400 lbs | ~2.0 lbs |
| 3/8″ (10 mm) | ~4,000–4,500 lbs | ~800–900 lbs | ~4.4 lbs |
| 1/2″ (12 mm) | ~6,000–6,500 lbs | ~1,200–1,300 lbs | ~6.8 lbs |
| 5/8″ (16 mm) | ~9,000–10,000 lbs | ~1,800–2,000 lbs | ~10.5 lbs |
| 3/4″ (18 mm) | ~13,000–14,000 lbs | ~2,600–2,800 lbs | ~15.0 lbs |
Common Applications
Marine:
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Dock lines and mooring lines
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Anchor ropes
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Sailboat halyards and sheets
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Fender lines
Industrial & Rigging:
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Hoisting and pulling lines
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Tag lines and winch lines
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Rigging slings and tie-downs
Comparison to Other Rope Types
| Feature | Polyester 3-Strand | Nylon 3-Strand | Polypropylene |
|---|---|---|---|
| Tensile Strength | High | Very High | Medium |
| Stretch | Low (3–5%) | High (15–30%) | Medium (10–15%) |
| UV Resistance | Excellent | Good | Poor to Fair |
| Water Absorption | Very Low (~0.5%) | Moderate (~6–10%) | None |
| Floats in Water | No | No | Yes |
| Abrasion Resistance | Excellent | Good | Fair |
Splicing and Termination
Polyester 3-strand rope is easy to splice using standard methods (eye splice, back splice, short splice). Properly spliced rope retains 90–95% of its original breaking strength. Splicing is recommended over knots for critical applications to maintain strength and longevity.
Durability and Longevity
This rope is engineered to offer years of dependable service in outdoor and marine environments. Its resistance to UV degradation and water absorption gives it a much longer lifespan than polypropylene or natural fiber ropes. It does not shrink or harden when exposed to water or sunlight.
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