4 Strands Twisted Polypropylene (PP) Mooring Rope is a practical, cost-effective rope tailored for mooring scenarios, featuring a 4-strand twisted structure (more balanced than 3-strand options for load distribution) and polypropylene as the core material. Its availability in standard lengths (100m, 200m) and customized cuts adapts to diverse mooring needs—from small watercraft to inland vessels—while leveraging PP’s inherent advantages of corrosion resistance and lightweight design. Below are its core features and targeted application scope:
Compared to common 3-strand twisted ropes, the 4-strand design distributes tension more evenly across each strand, reducing the risk of stress concentration and single-strand breakage. The tight twisting enhances the rope’s overall structural integrity, allowing it to withstand steady mooring forces (e.g., vessel sway from waves, wind pull) without excessive stretching or deformation. This balance also minimizes "hockling" (kinking or twisting) during deployment, ensuring smooth handling when tying mooring knots.
PP is inherently non-absorbent and corrosion-proof—a critical advantage for mooring. Unlike natural fibers (e.g., cotton) that rot, mildew, or gain weight when wet, this rope repels water, maintaining its strength and lightweight properties even after prolonged exposure to saltwater (coastal mooring) or freshwater (inland lakes/rivers). It also resists chemical erosion from marine pollutants or freshwater algae, extending service life.
The 4-strand twisted construction retains good flexibility, allowing the rope to bend smoothly around mooring cleats, bollards, or hooks without cracking or stiffening. PP’s slightly textured surface enhances friction, ensuring common mooring knots (e.g., cleat hitch, bowline, round turn and two half-hitches) stay tight and slip-resistant—even under dynamic loads (e.g., vessel movement). This flexibility reduces operator effort during tying/untieing, making it suitable for both professional mariners and recreational boaters.
PP is significantly lighter than alternative mooring materials (e.g., nylon, polyester, or steel). A 100m or 200m length of 4-strand PP mooring rope is easy to carry, coil, and store on board (e.g., in boat lockers) without occupying excessive space or adding unnecessary weight to the vessel. This lightweight property also simplifies on-site adjustments (e.g., shortening or extending the mooring line) and reduces fatigue during manual handling—ideal for small boats where crew size is limited.
Beyond standard 100m and 200m rolls, the rope supports customized length cuts (e.g., 50m for small dinghies, 150m for medium-sized fishing boats). This versatility ensures a perfect fit for different mooring scenarios: short lengths for tight marina slips, longer lengths for offshore buoys or vessels requiring extra line to accommodate tide changes. Customization also eliminates waste (no need to trim excess rope) and lowers costs for users with specific length requirements.
PP is an economical synthetic material, making this rope more affordable than high-performance alternatives (e.g., polyester mooring rope or steel-reinforced ropes) while meeting basic-to-moderate mooring demands. Additionally, its resistance to rot, mildew, and water damage means it requires minimal maintenance—no need for regular cleaning, drying, or coating. Simply rinse with freshwater after saltwater use and store in a dry place to maintain performance, reducing long-term upkeep costs.
- Target Vessels: Dinghies, kayaks, canoes, jet skis, small sailboats (under 8 meters), and recreational fishing boats.
- Scenarios: Mooring at marinas, private docks, lakefronts, or coastal anchorages. The rope’s lightweight and knot stability make it easy for hobbyists to handle, while its corrosion resistance stands up to occasional saltwater or freshwater exposure. Standard 100m lengths are sufficient for most recreational slips, while customized shorter lengths (30-50m) work for small craft like kayaks.
- Target Vessels: Inland cargo boats (carrying grain, coal, or construction materials), tugboats (small to medium), and ferry boats (short-distance routes).
- Scenarios: Mooring at river ports, canal docks, or lake harbors. Freshwater resistance prevents degradation from algae or sediment, and the 4-strand structure’s load-bearing capacity handles the steady pull of vessels in calm to moderately choppy inland waters. 200m lengths are ideal for vessels needing longer lines to account for river tides or dock spacing, while customized lengths fit specific berth requirements.
- Scenarios: Temporary anchoring for boats during maintenance (e.g., dockside repairs), emergency mooring after equipment failure (e.g., broken primary mooring lines), or temporary securing of floating structures (e.g., pontoons, rafts). The rope’s affordability and easy availability (in standard lengths) make it a practical backup option, while its flexibility allows quick deployment in urgent situations.
- Target Vessels: Small commercial fishing boats (coastal inshore fishing), oyster/mussel farm boats, and tourist boats (short coastal tours).
- Scenarios: Mooring at small coastal harbors or near aquaculture sites. Saltwater resistance ensures durability in marine environments, and the rope’s strength supports the occasional load of fishing gear or small cargo. Customized lengths (e.g., 120m, 180m) can be tailored to the specific distance between boats and mooring buoys in aquaculture areas.
- Scenario: Serving as a secondary or auxiliary mooring line for larger ships (e.g., cargo ships, cruise ships) when docked. While not suitable for primary load-bearing (due to PP’s lower tensile strength compared to steel or high-modulus fibers), it can be used to stabilize the vessel’s position, secure non-critical areas (e.g., gangways), or as a backup line for primary mooring systems. Standard 200m lengths provide enough coverage for the perimeter of larger vessel decks.
2. Main performance
| Material | Polyamide
Multifilament | Polyamide
Yarn | Polypropylene
Multifilament | Polypropylene | Polyester | Polypropylene and
Polyester Mixed |
| Spec.Density | 1.14
no floating | 1.14
not floating | 0.91
no floating | 0.91
Floating | 1.27
no floating | 0.95
Floating |
| Melting Point | 215℃ | 215℃ | 165℃ | 165℃ | 260℃ | 165℃/260℃ |
| Abrasion Resistance | Very Good | Very Good | Medium | Medium | Good | Good |
| U.V.Resistance | Very Good | Very Good | Medium | Medium | Good | Good |
| Temperature resistance | 120℃max | 120℃max | 70℃max | 70℃max | 120℃max | 80℃max |
| Chemical resistance | Very Good | Very Good | Good | Good | Good | Good |
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
Specification
规格 | PA Multifilament
锦纶复丝 | PAYarn
锦纶 | PP Multifilament
丙纶长丝 | Polypropylene
丙纶 | Polyester
涤纶 | PET/PP Mixed
丙纶/涤纶混合绳 |
| Dia. | Cir | Ktex | KN | Ktex | KN | Ktex | KN | Ktex | KN | Ktex | KN | Ktex | KN |
| 直径 | 圆 周 | 线密度 | 破断强力 | 线密度 | 破断强力 | 线密度 | 破断强力 | 线密度 | 破断强力 | 线密度 | 破断强力 | 线密度 | 破断强力 |
| 4 | 1/2 | 10 | 3.7 | 10 | 2.6 | 6.3 | 2.3 | 6 | 2.1 | 12 | 2.9 | 7.0 | 2.8 |
| 6 | 3/4 | 22 | 7.9 | 22 | 6 | 18 | 6.5 | 17 | 5.9 | 27 | 5.6 | 17.5 | 6.8 |
| 8 | 1 | 40 | 13.8 | 40 | 10.9 | 32 | 11.4 | 30 | 10.4 | 48 | 10.0 | 31 | 11.9 |
| 10 | 1-1/4 | 62 | 21.2 | 62 | 15.7 | 47 | 16.8 | 45 | 15.3 | 76 | 15.6 | 48.5 | 18.2 |
| 12 | 1-1/2 | 89 | 30.1 | 89 | 24.1 | 68 | 23.9 | 65 | 21.7 | 110 | 22.3 | 69.9 | 25.7 |
| 14 | 1-3/4 | 121 | 40.0 | 121 | 33.0 | 95 | 32.9 | 90 | 29.9 | 148 | 31.2 | 95.1 | 34.7 |
| 16 | 2 | 158 | 51.9 | 158 | 42.5 | 121 | 40.7 | 115 | 37.0 | 195 | 39.8 | 124 | 44.8 |
| 18 | 2-1/4 | 200 | 64.3 | 200 | 53.9 | 155 | 51.9 | 148 | 47.2 | 245 | 49.8 | 157 | 56.1 |
| 20 | 2-1/2 | 247 | 79.2 | 247 | 66.7 | 189 | 62.6 | 180 | 56.9 | 303 | 62.3 | 194 | 68.7 |
| 22 | 2-3/4 | 299 | 94.0 | 299 | 80.4 | 231 | 75.0 | 220 | 68.2 | 367 | 74.7 | 235 | 82.1 |
| 24 | 3 | 355 | 112 | 355 | 93.6 | 273 | 87.7 | 260 | 79.7 | 437 | 89.6 | 279 | 96.3 |
| 26 | 3-1/4 | 417 | 129 | 417 | 111.5 | 320 | 101 | 305 | 92.2 | 512 | 105 | 328 | 113 |
| 28 | 3-1/2 | 484 | 149 | 484 | 127 | 373 | 115 | 355 | 105 | 594 | 120 | 380 | 130 |
| 30 | 3-3/4 | 555 | 169 | 555 | 143 | 425 | 132 | 405 | 120 | 682 | 134 | 437 | 148 |
| 32 | 4 | 632 | 192 | 632 | 161 | 483 | 146 | 460 | 132 | 778 | 154 | 497 | 167 |
| 36 | 4 - 1/ 2 | 800 | 240 | 800 | 200 | 614 | 182 | 585 | 166 | 982 | 190 | 629 | 210 |
| 40 | 5 | 987 | 294 | 987 | 241 | 756 | 221 | 720 | 201 | 1215 | 235 | 776 | 257 |
| 44 | 5-1/2 | 1190 | 351 | 1190 | 289 | 924 | 266 | 880 | 242 | 1468 | 275 | 939 | 308 |
| 48 | 6 | 1420 | 412 | 1420 | 338 | 1092 | 308 | 1040 | 280 | 1750 | 329 | 1110 | 364 |
| 52 | 6-1/2 | 1670 | 479 | 1670 | 393 | 1281 | 357 | 1220 | 325 | 2050 | 384 | 1320 | 424 |
| 56 | 7 | 1930 | 550 | 1930 | 450 | 1491 | 408 | 1420 | 371 | 2380 | 439 | 1520 | 489 |
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4 Strands Twisted Pp Rope 100m 200m Customized Length Polypropylene Mooring Rope Images
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