Anchor line

Product overview
The multifilament polyester (Terylene) 3-strand mooring rope is engineered for professional maritime use, offering a balance of tensile strength, abrasion and chemical resistance, low water absorption and predictable elongation. Suited for vessel mooring, towing, anchor lines and heavy-duty deck operations across small to large vessels.

Key benefits

• Consistent mooring performance across vessel types and operational conditions
• High abrasion and chemical resistance for extended service life in marine environments
• Low water absorption and stable wet weight for reliable handling
• UV-stabilized fibers to retain strength under prolonged sun exposure
• Economical option for professional mooring and towing applications

Material and engineering highlights
Constructed from high-tenacity multifilament polyester (Terylene) fibers with integrated UV stabilizers. The 3-strand laid construction provides manageable handling, simple splicing repairs and a favorable strength-to-weight ratio. Typical tensile strength of fibers is in the range of 600–800 MPa; material resists acids, bases, oils and common marine chemicals.

Standard sizes and typical performance (selected examples)

• Ø 4 mm — Circumference ~1/2 in — Weight ~2.36 kg/200m — Breaking load ~2.9 kN (0.3 t) — Small utility lines, decorative
• Ø 10 mm — Circumference ~1-1/4 in — Weight ~15.2 kg/200m — Breaking load ~15.6 kN (1.59 t) — Small vessel auxiliary lines
• Ø 20 mm — Circumference ~2-1/2 in — Weight ~60.6 kg/200m — Breaking load ~62.3 kN (6.36 t) — Small-medium vessel mooring
• Ø 40 mm — Circumference ~5 in — Weight ~243 kg/200m — Breaking load ~235 kN (23.98 t) — Medium vessel mooring
• Ø 60 mm — Circumference ~7-1/2 in — Weight ~546 kg/200m — Breaking load ~489 kN (49.9 t) — Large vessel mooring

Material specifications

• Fiber material: Multifilament polyester (Terylene) — material analysis per ISO 1209
• Fiber grade: High-tenacity polyester — tensile testing per ASTM D6775
• UV stabilizers: Incorporated during fiber manufacture — tested per ASTM G154
• Construction: 3-strand laid; lay direction right- or left-hand (customer specified)
• Diameter tolerance: ±3% of nominal — measured per ISO 1209
• Weight tolerance: ±5% per 200 m — weighing per ISO 1209

Performance specifications

• Minimum breaking load: Specified per diameter — tensile testing to failure
• Elongation at break: Typically 20–25% — tensile testing
• Elongation at 50% MBL: <5% — low-stretch behavior
• UV resistance: ≥90% retained strength after 500 h accelerated UV (ASTM G154)
• Abrasion resistance: High — tested per ISO 5470
• Chemical resistance: Resistant to acids, bases, oils and marine chemicals — ISO 1419
• Water absorption: <1% weight gain after 24 h immersion
• Operating temperature: -20°C to +60°C

Elongation characteristics (relevant to mooring)

• 10% MBL — <0.5% elongation — minimal deformation at light loads
• 25% MBL — <2% elongation — stable load distribution
• 50% MBL — <5% elongation — predictable behavior at typical working loads
• 75% MBL — 10–15% elongation — controlled deformation before failure
• At breaking load — 20–25% elongation

Diameter scaling properties

• Breaking load ∝ diameter²
• Weight per unit length ∝ diameter²
• Bending stiffness ∝ diameter⁴
• Abrasion resistance ∝ diameter
• Handling difficulty increases with diameter

Comparison: polyester vs. alternative materials (summary)

• Strength: Polyester — excellent; Polypropylene — good; Nylon — excellent; Polyethylene — good
• Abrasion resistance: Polyester — excellent; Polypropylene — fair; Nylon — superior; Polyethylene — fair
• UV resistance: Polyester — excellent; Polypropylene/Nylon/Polyethylene — fair
• Flotation: Polyester — sinks; Polypropylene/Polyethylene — float; Nylon — sinks
• Service life: Polyester/Nylon — 4–6 years typical; Polypropylene/Polyethylene — 2–3 years

Manufacturing and quality control
Fiber selection and tension-controlled strand manufacture, optimized lay angles and continuous monitoring of diameter and tension. Final ropes undergo breaking load testing, elongation checks and documented verification of diameter and weight. Production and testing reference ISO 1209, ASTM D6775, ASTM G154, ISO 1419 and ISO 5470.

Standards & compliance
Designed and tested to comply with marine rope standards where applicable (ISO 1209, EN 1891, ISO 1419, ASTM G154, ISO 5470). Can be supplied with test certificates to meet classification society and port authority requirements.

Technical specifications

• Product type: Multifilament polyester (Terylene) 3-strand laid mooring rope
• Fiber: High-tenacity multifilament polyester (Terylene)
• Construction: 3-strand laid; lay direction right- or left-hand (customer specified)
• Diameter tolerance: ±3% of nominal
• Weight tolerance: ±5% per 200 m
• Typical diameters and breaking loads: 4 mm (~2.9 kN), 10 mm (~15.6 kN), 20 mm (~62.3 kN), 40 mm (~235 kN), 60 mm (~489 kN)
• Elongation at break: 20–25%; elongation at 50% MBL <5%
• UV resistance: ≥90% strength retention after 500 h (ASTM G154)
• Water absorption: <1% after 24 h immersion
• Operating temperature: -20°C to +60°C
• Typical service life: 4–6 years (application dependent)
• Standards: ISO 1209, EN 1891, ISO 1419, ASTM G154, ISO 5470