Product Specification

High Quality Polypropylene Mooring Rope 8 Strand Multifilament Polypropylene Rope for Ship 48mm 68mm 88mm 120mm

1.PHOTOS

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: Selection and Pretreatment of High-Grade Multifilament Polypropylene Raw Materials

Step 2: Multifilament Bundle Twisting for Strand Preparation

Step 3: 8-Strand Braiding for Custom Diameters (48mm–120mm)

Step 4: Heat-Setting and Stabilization for Marine Durability

Step 5: Marine-Specific Surface Treatments

• Abrasion-Resistant Coating: A thin, flexible PP-compatible polymer coating is applied to the rope’s surface. This coating reinforces resistance to friction from ship hulls, concrete docks, or metal hardware—common sources of wear in mooring applications—without compromising flexibility.
• UV and Chemical Inhibition: The rope is dipped in a UV-stabilizing solution (containing benzophenone-based additives) and dried in a ventilated chamber. This treatment prevents PP fiber brittleness and color fading from prolonged sun exposure. Additionally, a hydrophobic agent is applied to further reduce water absorption (PP is inherently low-absorbency, but this step enhances performance in heavy rain or salt spray).

Step 6: Trimming, Sizing Verification, and Quality Testing

• Tensile Strength Testing: Using a hydraulic load machine, ropes are tested to ensure they meet load-bearing standards (e.g., 48mm ropes for small ships, 120mm ropes for large cargo vessels).
• Diameter Consistency: Calibrated calipers measure the rope at multiple points to confirm it stays within ±1mm of the target size (48mm/68mm/88mm/120mm).
• Water Absorption Test: Ropes are submerged in saltwater for 24 hours; only those with <1% weight gain (a hallmark of high-quality PP) pass.
• Abrasion Resistance Test: Ropes are rubbed against a concrete surface (simulating dock contact) for 1,000 cycles—fraying or strand damage results in rejection.

Step 7: Packaging for Shipping and Storage

2. Application Scope

Primary: Ship Mooring for Vessels of All Sizes (Diameter-Matched)

• 48mm Rope: Ideal for small to medium-sized vessels, including fishing boats, tugboats, and recreational yachts (10–20m in length). Used to secure vessels to docks, buoys, or port pilings in calm to moderately rough coastal waters—its compact size ensures easy handling while providing sufficient strength for lighter mooring loads.
• 68mm Rope: Suited for mid-sized commercial vessels, such as cargo ships (20–40m), ferries, and offshore supply boats. Handles higher mooring tensions from wind and waves, making it suitable for port operations (loading/unloading) or temporary mooring in offshore anchorages.
• 88mm Rope: For large commercial ships, including container ships (40–60m), bulk carriers, and cruise ships (small to mid-sized). Used as primary mooring lines or backup lines, it withstands heavy dynamic loads (e.g., strong tides or vessel movement during cargo transfer) and is compatible with large-scale mooring hardware (heavy-duty cleats, winches).
• 120mm Rope: Reserved for extra-large vessels, such as large container ships (over 60m), oil tankers (small to mid-sized), and naval auxiliary ships. Serves as main mooring hawser lines in busy ports or offshore terminals—its exceptional strength and thickness ensure stability even in harsh marine conditions (high winds, rough seas).

Secondary: Port and Dock Infrastructure Securement

• Securing floating docks, gangways, or loading platforms to fixed pilings—prevents shifting during ship berthing or cargo handling. For example, 68mm or 88mm ropes are used to anchor floating loading ramps for trucks or forklifts accessing ships.
• Reinforcing temporary barriers (e.g., around construction zones in ports) to prevent accidental collisions with ships or equipment. 48mm ropes are often used for lighter barriers, while 120mm ropes secure heavy-duty safety barriers.

Emergency Ship Anchoring and Towing (Light-to-Medium Duty)

• Emergency Anchoring: When a ship’s primary anchor line fails, 68mm–88mm ropes are deployed as temporary anchor lines to secure the vessel to a buoy or another ship—preventing drifting in open water or near hazards (reefs, rocks).
• Light-to-Medium Towing: 48mm–68mm ropes are used to tow small vessels (e.g., disabled fishing boats) to safety in calm coastal waters. The rope’s low stretch and high strength ensure stable towing without straining the towed or towing vessel.

Onboard Ship Equipment Securement

• Tying down deck-mounted gear, such as lifeboats, navigation buoys, or maintenance tools—prevents shifting during rough seas. 48mm ropes are ideal for lighter gear, while 88mm–120mm ropes secure heavier equipment (e.g., small cranes or cargo containers).
• Securing temporary cargo (e.g., pallets of supplies, spare parts) on deck—its smooth multifilament surface avoids damaging cargo packaging, and its water resistance prevents degradation from salt spray.

Offshore and Coastal Construction Support

• Anchoring small offshore platforms (e.g., worker accommodation modules or equipment storage units) to the seabed. 68mm–88mm ropes are used here, as they balance strength and flexibility for dynamic offshore conditions.
• Guiding and stabilizing construction materials (e.g., pipes, concrete blocks) during transport from ships to construction sites—120mm ropes handle the heaviest loads, ensuring materials stay on course in rough waters.