Product Specification

3/8" X 200'PREMINUM THREE STRAND TWISTED ANCHOR LINE NYLON MARINE ROPE

Production Process

1. Nylon Fiber Extrusion & Drawing: High-quality nylon pellets (typically nylon 6 or nylon 6,6, selected for marine durability) are melted in an extruder at controlled high temperatures. The molten nylon is then forced through spinnerets to form continuous filaments. These filaments are drawn (stretched) to align the polymer molecules, enhancing tensile strength and reducing elongation variability—critical for anchor line reliability.
2. Filament Bundling & Yarn Spinning: The drawn nylon filaments are grouped into bundles (based on the required 3/8" diameter specification) and twisted into yarns. This twisting process adds initial cohesion to the filaments, ensuring they resist separation during subsequent manufacturing and use. Multiple yarns may be combined to achieve the necessary thickness for the final rope strands.
3. Strand Formation: Three sets of the spun nylon yarns are each twisted individually in a consistent direction (e.g., "S-twist") to form three separate strands. The twist tightness is precisely calibrated: too loose, and the strand lacks strength; too tight, and it risks brittleness. Each strand is inspected for uniformity in thickness and twist to ensure balanced load distribution in the final rope.
4. Three-Strand Twisting (Closing): The three pre-twisted strands are fed into a closing machine, where they are twisted together in the opposite direction of their individual twist (e.g., "Z-twist") to form the final 3/8" diameter rope. This counter-twisting creates interlock between the strands, boosting overall durability and preventing unraveling. Tension during closing is carefully controlled to avoid strand distortion.
5. Post-Treatment & Cutting: The continuous rope is treated with marine-grade coatings (e.g., UV inhibitors, anti-mildew agents) to enhance resistance to saltwater, sunlight, and moisture. It is then washed and dried to set the twist and remove manufacturing residues. Finally, the rope is cut to the 200' length, with both ends sealed (e.g., heat-sealing or crimping) to prevent fraying. A final quality check verifies diameter, length, tensile strength, and surface integrity before packaging.

Key Features

• High Tensile Strength for Anchor Loads: The three-strand twisted construction optimizes the inherent strength of premium nylon, enabling the rope to withstand heavy static loads (e.g., holding a vessel in place via its anchor) and moderate dynamic forces (e.g., wave-induced tension) without stretching excessively or snapping. It meets rigorous load requirements for small to mid-sized marine vessels.
• Controlled Elasticity & Shock Absorption: Unlike rigid ropes, this nylon anchor line offers controlled elongation (typically 20-30% at break), which absorbs sudden shocks—such as when the anchor snags on the seabed or waves jolt the vessel. This cushioning effect protects both the rope and connected hardware (e.g., anchor shackles, boat cleats) from damage.
• Superior Saltwater & Moisture Resistance: Premium marine nylon is inherently resistant to degradation from saltwater, brackish water, and constant moisture. It does not rot, mildew, or corrode when immersed or exposed to salt spray, ensuring consistent performance in coastal, offshore, or saltwater environments. It also dries quickly to avoid unnecessary weight gain.
• Abrasion Resistance for Seabed & Deck Contact: The twisted three-strand structure creates a dense, robust outer surface that resists abrasion from rough seabeds (e.g., rocks, sand, coral), dock edges, or boat deck hardware. It withstands repeated friction without fraying or losing strand integrity, extending the rope’s service life in high-wear anchor applications.
• UV Stability for Long-Term Outdoor Use: Formulated with UV inhibitors, the rope resists degradation from prolonged sunlight exposure (e.g., when moored in open water or stored on deck). It maintains tensile strength and flexibility over time, avoiding brittleness or discoloration that can compromise performance in outdoor marine settings.

Application Scope

• Anchor Lines for Small to Mid-Sized Vessels: Designed primarily as anchor lines for boats, sailboats, and powerboats (typically 15-40 feet in length). It secures the vessel to its anchor in coastal waters, bays, lakes, or mild offshore areas, providing reliable holding power even in moderate wind and wave conditions.
• Temporary Mooring for Recreational Boats: Suitable for temporary mooring (e.g., short stops at a buoy, overnight docking in non-commercial marinas) where durability and shock absorption are needed. Its flexibility allows easy tying of secure knots (e.g., bowline, cleat hitch), while saltwater resistance ensures reliability in coastal mooring environments.
• Dinghy & Tender Securement: Used to secure small dinghies, tenders, or inflatable boats to larger parent vessels or docks. Its strength handles the weight of the small craft, and its abrasion resistance stands up to contact with boat hulls or dock surfaces during docking and undocking.
• Light-Duty Towing of Small Watercraft: Ideal for light towing tasks, such as pulling a dinghy behind a sailboat or towing a small jet ski in calm waters. Its controlled elasticity reduces strain on both the towing vessel and the towed craft, while UV resistance ensures it holds up during daytime towing trips.
• Marine Equipment Anchoring (Light Loads): Used to anchor lightweight marine equipment, such as floating docks, small buoys, or temporary fishing gear (e.g., crab pots, small nets) in shallow to moderate-depth waters. Its moisture and mildew resistance prevents degradation when left deployed for extended periods.

2. Main performance

3.Technology Comparison

Coil length: 220m

Spliced strength:± 10% lower

Weight and length tolerance:± 5%

MBL=Minimum Breaking Load conform ISO 2307

Other sizes available upon request

4.Parameter Table