Product Specification

Floating Ship Mooring Rope 3 Strand Twisted 4mm-64mm Polyester Polypropylene PP Nylon Marine Rope

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

Production Process

Step 1: Raw Material Selection and Preparation

• Choose high-quality synthetic polymers (polyester, polypropylene/PP, or nylon) based on the rope’s intended use (e.g., polypropylene for enhanced floatability, polyester for superior abrasion resistance, nylon for elasticity).
• Inspect raw materials for consistency in fiber thickness, strength, and purity to avoid defects.
• Melt and extrude the polymers into continuous filaments: Heat the selected polymer pellets to a molten state, then push the molten material through spinnerets (fine holes) to form long, uniform filaments. These filaments are cooled rapidly to solidify and maintain structural integrity.

Step 2: Filament Drawing and Stranding

• Draw the solidified filaments to align their molecular structure, which enhances tensile strength. The drawing process stretches the filaments to a specific length, adjusting their thickness to meet the rope’s diameter requirements (4mm-64mm).
• Gather the drawn filaments into small bundles (called “yarns”) and twist these yarns together to form individual strands. For 3-strand rope, three identical strands are produced, each with consistent twist tightness to ensure balanced load distribution later.

Step 3: Core Treatment (for Floatability Enhancement)

• For ropes requiring strong floatability (critical for ship mooring), integrate a lightweight core (often made of hollow polypropylene fibers or foam-filled structures) into each strand during stranding. This core reduces the rope’s overall density, ensuring it stays afloat in water and avoids sinking—essential for easy retrieval and visibility during mooring.
• Ensure the core is evenly enclosed within the twisted yarns to prevent shifting or exposure, which could compromise floatability and strength.

Step 4: 3-Strand Twisting (Main Rope Formation)

• Feed the three prepared strands into a twisting machine, which rotates them in a uniform direction (either left or right twist) to braid them into the final 3-strand twisted rope. The twist rate is calibrated based on the rope’s diameter: thicker ropes (e.g., 64mm) require a tighter twist to maintain structural stability, while thinner ones (e.g., 4mm) use a moderate twist for flexibility.
• Monitor the twisting process to ensure the three strands are evenly tensioned—uneven tension would lead to weak spots or uneven load distribution in the finished rope.

Step 5: Post-Treatment and Quality Inspection

• Heat Setting: Subject the twisted rope to controlled heat to “set” the twist, preventing the strands from unraveling and stabilizing the rope’s shape. This step also reduces shrinkage when the rope is exposed to water or temperature changes later.
• Surface Coating (Optional): Apply a water-resistant or UV-protective coating (e.g., polyurethane-based) to enhance durability against marine elements (saltwater, sunlight) for ropes used in harsh offshore environments.
• Quality Testing: Conduct rigorous tests on sample ropes, including:
  • Tensile strength testing to ensure it meets load-bearing standards for ship mooring.
  • Floatability testing (submerging the rope in water to verify it stays afloat).
  • Abrasion resistance testing (rubbing the rope against rough surfaces to check for fraying).
  • Diameter measurement to confirm consistency across the 4mm-64mm range.
• Cutting and Packaging: Cut the finished rope into custom lengths (per customer or industry needs) and package it in moisture-proof materials (e.g., woven plastic bags) to protect it during storage and transportation.

2. Application Scope

Marine Vessel Mooring (Primary Use)

• Small to Large Ships: Suitable for mooring various vessels, from small recreational boats (using 4mm-12mm ropes for lightweight securing) to large commercial ships, cargo vessels, or ferries (using 24mm-64mm ropes for heavy-duty load-bearing). It secures vessels to docks, piers, buoys, or other ships during berthing, loading/unloading, or temporary anchoring.
• Offshore and Coastal Mooring: Ideal for offshore platforms (e.g., oil rig support vessels) or coastal marinas, where the rope’s floatability ensures it remains visible and accessible (avoiding tangling with underwater structures) and its resistance to saltwater prevents degradation.

Port and Harbor Operations

• Dock Infrastructure Securing: Used to stabilize floating docks, gangways, or temporary port structures (e.g., cargo loading ramps). The rope’s strength withstands the lateral forces of waves and currents, while its flexibility allows it to adjust to the dock’s movement.
• Cargo Handling Assistance: Acts as a “tag line” to guide and stabilize cargo (e.g., containers, machinery) being lifted onto or off ships. Thicker ropes (32mm-64mm) handle the tension of guiding heavy cargo, while thinner ones (4mm-16mm) assist with lighter loads.

Recreational and Light Marine Activities

• Water Sports and Leisure Boating: For small watercraft like kayaks, canoes, or jet skis, 4mm-10mm ropes are used for mooring to shorelines or floating docks. Their floatability prevents loss if accidentally dropped in water, and their lightweight design makes them easy to handle.
• Marine Toy and Equipment Securing: Secures inflatable water toys (e.g., tubes, rafts), fishing gear, or life rafts to boats. The rope’s resistance to water and UV rays ensures it remains durable during prolonged outdoor use.

Industrial and Emergency Marine Uses

• Light-Duty Towing: Used for towing small vessels (e.g., dinghies, patrol boats) in calm waters. Thicker ropes (16mm-36mm) provide the necessary strength, while floatability helps track the rope’s position during towing.
• Emergency Response: Serves as a backup mooring rope or rescue line for marine emergency situations (e.g., vessel drift, stranded boats). Its quick accessibility (due to floatability) and reliable strength make it a valuable tool for coast guard or rescue teams.

Aquaculture and Coastal Engineering

• Aquaculture Farms: Secures floating fish cages, oyster beds, or seaweed cultivation structures in coastal or offshore aquaculture. The rope’s resistance to saltwater and marine organisms (e.g., barnacles) prevents deterioration, while floatability keeps the structure visible and easy to maintain.
• Coastal Protection Projects: Used in temporary coastal engineering works (e.g., securing sandbags, floating barriers) to prevent erosion or contain debris. Thicker ropes (36mm-64mm) withstand the harsh conditions of coastal waves, while their flexibility adapts to shifting terrain.