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

Since its establishment in 2005, Qingdao Jincheng Maritime Technology Co., Ltd. has been steadily advancing in the maritime technology field for nearly two decades. The company focuses on the core business of manufacturing marine supplies, always adhering to the concepts of innovation and excellence, and is committed to providing comprehensive and high-quality products and services to the global maritime industry.

In terms of product manufacturing, the company has a rich and diverse product line, covering marine navigation equipment, marine safety protection supplies, marine interior decorations, and various functional accessories for ships. From precise navigation instruments to sturdy and durable life-saving equipment, from comfortable and beautiful cabin interiors to efficient and practical marine tools, every product undergoes strict quality control to ensure compliance with international standards and industry specifications.

The company attaches great importance to technological research and development and innovation. It has formed a research and development team composed of senior maritime engineers, professional technicians, and innovative talents. The team continuously explores cutting-edge technologies, actively introduces new materials and processes, and continuously optimizes product performance to meet the growing intelligent and green demands of the maritime industry. At the same time, the company has established long-term and stable cooperative relationships with many well-known domestic and foreign universities and scientific research institutions. Through the collaborative innovation of industry, university, and research, it accelerates the transformation of scientific research achievements and injects a continuous stream of impetus into the company's development.

With reliable product quality, advanced technological level, and a complete after-sales service system, Qingdao Jincheng Maritime Technology Co., Ltd. has won a good reputation and wide recognition in the industry. Its products not only sell well in major domestic ports and shipbuilding enterprises but also are exported to many countries and regions overseas. The company has established long-term cooperative relationships with many internationally renowned shipping companies. Looking to the future, the company will continue to forge ahead, continuously enhance its core competitiveness, and contribute to the advancement of maritime technology and the development of the global shipping industry.