
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 |
High-quality nylon polymer pellets (typically nylon 6 or nylon 6,6, chosen for marine durability) are melted in an extruder at controlled temperatures (around 250–280°C). The molten nylon is forced through a spinneret (a metal plate with tiny holes) to form continuous filaments. These filaments are then stretched (drawn) to align the polymer molecules, enhancing tensile strength and reducing elongation—critical properties for marine and utility loads. The drawn filaments are cooled and wound onto bobbins as "tow" (bundles of filaments).
The nylon tow is twisted into yarn using a spinning machine. The twist level is adjusted to balance flexibility and strength: too little twist weakens the yarn, while too much makes it stiff. Multiple filaments are twisted together to create a single, durable yarn strand, which is then wound onto larger bobbins for subsequent processing.
Three separate spools of nylon yarn are fed into a plying machine. The machine twists each yarn individually to form three uniform "base strands"—each with consistent thickness and twist direction. This step ensures each strand has equal load-bearing capacity, preventing uneven stress distribution in the final rope.
The three base strands are aligned and fed into a stranding machine. The machine twists the three strands together in the opposite direction of their individual twist (a process called "counter-twisting") to create the final 3-strand twisted rope. The twist tightness is calibrated: a tighter twist boosts abrasion resistance (ideal for docks/anchors), while a moderate twist maintains flexibility for utility use. The finished rope is wound onto large reels or cut into custom lengths.
- Washing & Drying: The rope is washed to remove manufacturing residues (e.g., lubricants) that could attract dirt or degrade in saltwater.
- UV Stabilization Coating: A clear, marine-grade UV inhibitor coating is applied to prevent brittleness from sunlight—essential for outdoor dock/anchor use.
- Tensile Testing: Random samples are tested for breaking strength, elongation, and twist stability to ensure compliance with marine and utility standards.
- Coiling & Packaging: The rope is coiled neatly (to avoid kinking) and packaged in moisture-resistant materials for storage and transport.
- Reliable Tensile Strength & Load Distribution: The 3-strand twisted design distributes weight and tension evenly across all three strands, ensuring consistent load-bearing performance. Nylon’s inherent fiber strength, paired with the twist structure, allows the rope to handle moderate-to-heavy loads (e.g., securing mid-sized boats, lifting small utility equipment) without strand separation or sudden failure.
- Superior Saltwater & Moisture Resistance: Nylon is naturally hydrophobic (water-repellent), and the tight 3-strand twist minimizes water absorption. Unlike ropes that swell or rot in moisture, this rope resists saltwater corrosion, mildew, and degradation—even after prolonged submersion (critical for anchor lines) or exposure to dockside spray.
- Balanced Elasticity & Shock Absorption: Nylon’s moderate elasticity is enhanced by the 3-strand twist, allowing the rope to stretch slightly to absorb sudden shocks (e.g., wave impacts on dock lines, jolts when anchoring). This property protects both the rope and connected equipment (e.g., boat cleats, utility hooks) from damage caused by abrupt tension spikes.
- Durable Abrasion Resistance: The twisted 3-strand structure creates a rugged outer surface that withstands friction against rough marine surfaces (e.g., concrete docks, metal cleats, rocky seabeds) and utility materials (e.g., wood, metal pipes). It resists fraying and surface wear, maintaining integrity even with frequent, repeated contact.
- Easy Handling & Knot Stability: The 3-strand twist provides consistent flexibility—easy to bend, coil, and tie into secure knots (e.g., bowline, cleat hitch) without kinking. Once tied, the rope’s twist structure holds knots tightly, preventing slippage even in wet conditions (vital for dock lines that must stay secure during tides).
- Used to secure boats (small recreational vessels, fishing boats, mid-sized yachts) to docks, piers, or buoys. Its moisture resistance and knot stability ensure the boat stays anchored during tides, rain, or light waves. The abrasion resistance protects against wear from dock edges or boat hulls.
- Ideal for temporary or long-term mooring: flexible enough for quick adjustments (e.g., adjusting tension for rising tides) and durable enough for seasonal use in coastal or saltwater marinas.
- Suitable for anchor systems on small to mid-sized boats (e.g., sailboats, pontoons) in calm to moderately rough waters (lakes, bays, coastal areas). Its elasticity absorbs shock from wave action, preventing the anchor from dislodging, while saltwater resistance ensures longevity during submersion.
- Used for short-term anchoring (e.g., fishing stops) or overnight stays: strong enough to hold the boat’s weight and flexible enough for easy deployment/retrieval.
- Outdoor & Construction Tasks: Tying down equipment (e.g., ladders, scaffolding, tools) on job sites, securing temporary barriers, or bundling materials (e.g., pipes, lumber). Its abrasion resistance handles rough surfaces, and UV stability withstands prolonged sunlight.
- Agricultural Applications: Securing light farm equipment (e.g., small trailers, irrigation hoses), tying plant stakes (e.g., tomato vines), or bundling hay bales. Moisture resistance prevents rot in damp farm environments.
- Recreational Utility: Setting up camping gear (e.g., tent guy lines, gear-hanging ropes), creating temporary clotheslines, or securing outdoor furniture. Easy handling makes it user-friendly for casual outdoor use.
- Light Industrial Tasks: Guiding lightweight materials (e.g., fabric rolls, small packages) in warehouses, or as a tag line to stabilize items during light lifting (e.g., moving small machinery parts). Its flexibility allows it to route around obstacles easily.