This 3-strand twisted rope series combines a classic, reliable 3-strand twisted structure with three high-performance synthetic materials (Polyester, Nylon, PP) and four large diameters (38mm/40mm/50mm/60mm). The design prioritizes load-bearing capacity, durability, and adaptability to heavy-duty scenarios—from marine operations to industrial lifting—while the material and diameter options let users tailor the rope to specific environmental and strength requirements. Below are its core features and targeted uses:
The 3-strand twisted design is a time-tested structure that balances tensile strength and flexibility. Each strand is tightly twisted to distribute weight evenly across the rope, enabling it to withstand heavy loads (critical for large diameters like 50mm/60mm) without premature fraying or strand separation. Additionally, the 3-strand layout is easy to splice, knot, and repair—even for thick diameters—making it accessible for on-site adjustments (e.g., creating loops for hooks) in industrial or marine settings. Unlike complex braided ropes, its simple structure also reduces the risk of "hockling" (kinking), ensuring smooth deployment.
Each material (Polyester, Nylon, PP) has unique properties, allowing the rope to adapt to different conditions—this is one of the series’ key advantages. The table below compares their core traits:
The 38mm/40mm/50mm/60mm diameters are engineered for heavy loads and high-stress scenarios. For example:
- 38mm/40mm: Suitable for medium-heavy tasks (e.g., mooring small commercial ships, lifting light industrial equipment).
- 50mm/60mm: Ideal for heavy-duty applications (e.g., mooring large cargo ships, towing vehicles, or securing construction materials).
Thicker diameters increase the rope’s cross-sectional area, directly boosting its maximum safe working load (SWL)—critical for operations where equipment, cargo, or personnel safety depends on rope reliability.
All three materials are synthetic, so they outperform natural fibers ( cotton) in durability:
- Moisture resistance: Nylon and PP repel water (PP is completely non-absorbent), while polyester absorbs minimal water—none will rot, mildew, or lose strength when wet (essential for marine or outdoor use).
- Abrasion resistance: Polyester and nylon stand up to friction against rough surfaces (e.g., ship hulls, concrete docks, metal hooks), while PP offers decent abrasion resistance for less demanding scenarios.
- Chemical resistance: All three resist common industrial chemicals (oils, solvents) and marine pollutants, making the rope suitable for ports, factories, or chemical storage areas.
- Versatility: The combination of material, diameter, and 3-strand structure covers a wide range of use cases—from marine mooring to industrial lifting—eliminating the need to stock multiple rope types.
- Cost-effectiveness: PP is the most economical option for budget-sensitive, non-UV-intensive tasks; polyester and nylon offer higher performance at a moderate cost (more affordable than specialized ropes like aramid or steel cables). This makes the series accessible for both small businesses and large enterprises.
The rope’s uses vary by material and diameter, with each combination optimized for specific scenarios:
Marine use is the series’ primary application, leveraging all three materials’ water resistance and the large diameters’ load capacity:
- Polyester (38mm-60mm): Ideal for long-term mooring of large vessels (cargo ships, cruise ships) or offshore platforms. Its UV resistance withstands prolonged sunlight exposure, and low elasticity ensures the rope stays taut (prevents excessive vessel sway in rough seas). 50mm/60mm polyester ropes are often used for primary mooring lines in ports.
- Nylon (40mm-60mm): Perfect for towing boats (e.g., tugboats pulling barges) or emergency mooring. Its high elasticity absorbs shock from waves or sudden tugs, protecting both the rope and the vessel. 60mm nylon ropes are used for heavy-duty towing in coastal or inland waterways.
- PP (38mm-40mm): Suitable for temporary mooring of small-to-medium commercial boats (fishing vessels, ferries) in freshwater or sheltered coastal areas. Its lightweight design makes it easy to handle, though it should be stored indoors when not in use to avoid UV damage.
The large diameters and high strength make the rope suitable for light-to-medium industrial lifting (not for overhead lifting of personnel—always check SWL for safety):
- Polyester (40mm-50mm): Used to lift or secure heavy materials (steel beams, concrete blocks) in construction sites or factories. Its low stretch ensures precise positioning of loads, and abrasion resistance stands up to contact with metal or concrete.
- Nylon (50mm-60mm): Ideal for lifting fragile or high-value equipment (e.g., industrial machinery). Its shock absorption prevents damage from sudden load shifts, and high tensile strength supports heavy weights (e.g., 60mm nylon ropes can handle SWLs of 5-8 tons, depending on construction).
- PP (38mm-40mm): Used for light lifting (e.g., wooden pallets, plastic crates) in warehouses or agricultural facilities. Its affordability and lightweight design make it a cost-effective choice for non-critical lifting tasks.
The rope’s durability and load capacity suit outdoor construction scenarios:
- Polyester (40mm-60mm): Secures temporary structures (scaffolding, construction nets) or anchors heavy equipment (excavators, bulldozers) on job sites. Its UV and chemical resistance withstands harsh construction environments (dust, oils, sunlight).
- Nylon (50mm-60mm): Used for slope stabilization (e.g., securing soil nets on highway embankments) or as a backup cable for cranes. Its elasticity absorbs vibrations from construction activity, reducing wear on the rope.
- PP (38mm-40mm): Temporary fencing for construction zones or securing lightweight materials (pipes, lumber). It is easy to install and remove, making it ideal for short-term projects.
The rope’s versatility supports outdoor agricultural and forestry tasks:
- Polyester (38mm-40mm): Secures farm equipment (tractors, harvesters) to trailers or anchors irrigation systems (large sprinklers). Its UV resistance ensures longevity in open fields.
- Nylon (40mm-50mm): Used for logging (e.g., pulling tree trunks from forests) or securing hay bales on trucks. Its high strength and shock absorption handle the rough, uneven terrain of forestry sites.
- PP (38mm-40mm): Fencing for livestock (cattle, horses) or tying crops (e.g., supporting tomato vines). Its non-absorbent property prevents rot in damp farm environments, and it is affordable for large-scale use.
For heavy-duty recreational or public utility needs:
- Polyester (38mm-40mm): Mooring large recreational boats (yachts, houseboats) at marinas or lakes. Its UV resistance and low stretch keep the boat stable during long-term docking.
- Nylon (40mm-50mm): Used for zip lines (commercial parks) or as a cable for small ferries (lake crossings). Its elasticity ensures a smooth ride, and high strength guarantees user safety.
- PP (38mm-40mm): Floating lines for water parks (e.g., securing inflatable slides) or temporary buoys in lakes. Its lightweight, non-absorbent property keeps it afloat, and it is easy to maintain.

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 |