PP Danline Rope 3 Strand 5MM 8MM 18MM Heavy Duty Twisted Poly Polypropylene 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

Features

• Exceptional Floatability on Water: Made from polypropylene (PP), this rope is inherently buoyant and does not absorb water, allowing it to float on the surface of freshwater or saltwater. Unlike water-absorbent rope materials, it avoids becoming waterlogged—eliminating extra weight, reduced strength, or sinking risks. This floatability is consistent across all sizes (5MM, 8MM, 18MM), making it easy to locate and retrieve in marine environments.
• Heavy-Duty Tensile Strength & Load Distribution: The 3-strand twisted construction enhances the inherent durability of PP, creating a heavy-duty rope that withstands substantial tensile forces. Each strand works in tandem to distribute loads evenly, minimizing stress on individual fibers and reducing the risk of sudden breakage. The strength scales appropriately with size: 5MM for light to medium loads, 8MM for moderate tasks, and 18MM for heavy-duty applications like securing large equipment or vessels.
• Superior Resistance to Saltwater, Chemicals, and Mildew: Marine-grade PP is highly resistant to corrosion and degradation from saltwater, a key requirement for marine use. It also stands up to common marine chemicals (e.g., mild cleaning agents, fuel residues) without weakening. Additionally, its non-absorbent nature prevents moisture retention, eliminating the growth of mildew, rot, or mold—ensuring long-term structural integrity even after prolonged exposure to damp or wet conditions.
• Abrasion Resistance for Rough Marine Surfaces: The tight 3-strand twist forms a dense, rugged outer surface that resists abrasion against typical marine surfaces, such as boat hulls, metal cleats, concrete docks, or rocky shorelines. It withstands repeated friction (e.g., from wave movement or equipment contact) without fraying, unraveling, or losing strand integrity. This durability is consistent across all diameters, making even the thinner 5MM option suitable for low-wear marine tasks.
• UV Stability & Weather Resistance: Formulated with UV inhibitors, this PP rope maintains its strength and flexibility when exposed to prolonged sunlight—preventing brittleness, discoloration, or fiber breakdown. It also tolerates extreme temperature fluctuations (from hot coastal sun to cool offshore winds) without compromising performance. This weather resistance ensures reliability for both long-term mooring and temporary outdoor marine use.

Applications

• Small Vessel Mooring & Docking (5MM/8MM): Ideal for mooring small watercraft like kayaks, canoes, dinghies, or jet skis to docks, buoys, or shorelines. The 5MM and 8MM sizes offer sufficient strength for light to moderate loads, while their floatability makes them easy to spot and handle. Their saltwater resistance ensures no degradation in coastal or saltwater marinas.
• Heavy-Duty Vessel Securement & Mooring (18MM): Used for securing mid-sized boats, sailboats, or work vessels to pilings, docks, or larger ships during berthing. The 18MM size’s heavy-duty tensile strength handles the higher loads from wind, waves, or vessel movement, while its abrasion resistance stands up to contact with metal hardware or concrete structures.
• Marine Equipment & Cargo Tying: Suitable for securing on-deck equipment (e.g., fenders, life rafts, fishing gear, coolers) or cargo (e.g., supplies, tools) on boats or work vessels. All sizes (5MM for small gear, 8MM/18MM for larger items) provide reliable hold, and their mildew resistance ensures no damage from damp deck conditions. The twisted design also allows for easy knotting and adjustment.
• Boat Trailer Winch Lines (8MM/18MM): Used as winch lines for pulling boats onto trailers (e.g., small to mid-sized recreational boats). The 8MM and 18MM sizes offer the strength needed to handle the weight of the vessel, while their UV resistance prevents degradation from sun exposure during storage. Their non-absorbent nature also means no water-related weight gain during launch or retrieval.
• Marine Marking & Safety Lines: Employed as marker lines for swimming areas, fishing zones, or underwater obstacles (e.g., reefs, rocks) in lakes, rivers, or coastal waters. The 5MM size is lightweight and visible for temporary markers, while 8MM/18MM can be used for longer-term, more durable markers. Its floatability ensures the line stays visible on the water surface, and its weather resistance guarantees longevity in outdoor settings.

Since its establishment in 2005, Qingdao Jincheng Maritime Technology Co., Ltd. has been steadily advancing in the maritime technology field for nearly two decades. The company focuses on the core business of manufacturing marine supplies, always adhering to the concepts of innovation and excellence, and is committed to providing comprehensive and high-quality products and services to the global maritime industry.

In terms of product manufacturing, the company has a rich and diverse product line, covering marine navigation equipment, marine safety protection supplies, marine interior decorations, and various functional accessories for ships. From precise navigation instruments to sturdy and durable life-saving equipment, from comfortable and beautiful cabin interiors to efficient and practical marine tools, every product undergoes strict quality control to ensure compliance with international standards and industry specifications.

The company attaches great importance to technological research and development and innovation. It has formed a research and development team composed of senior maritime engineers, professional technicians, and innovative talents. The team continuously explores cutting-edge technologies, actively introduces new materials and processes, and continuously optimizes product performance to meet the growing intelligent and green demands of the maritime industry. At the same time, the company has established long-term and stable cooperative relationships with many well-known domestic and foreign universities and scientific research institutions. Through the collaborative innovation of industry, university, and research, it accelerates the transformation of scientific research achievements and injects a continuous stream of impetus into the company's development.

With reliable product quality, advanced technological level, and a complete after-sales service system, Qingdao Jincheng Maritime Technology Co., Ltd. has won a good reputation and wide recognition in the industry. Its products not only sell well in major domestic ports and shipbuilding enterprises but also are exported to many countries and regions overseas. The company has established long-term cooperative relationships with many internationally renowned shipping companies. Looking to the future, the company will continue to forge ahead, continuously enhance its core competitiveness, and contribute to the advancement of maritime technology and the development of the global shipping industry.