220m Length 3 Strand Twisted Danline 6mm Polypropylene Polysteel

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

1. Production Process

Step 1: Material Preparation & Fiber Blending

• Polypropylene (PP) Pellet Melting: High-density polypropylene pellets are fed into an extruder, where they are heated to 180–220°C to melt into a molten polymer. The molten PP is then extruded through fine spinnerets to form continuous, thin polypropylene filaments. These filaments are cooled rapidly with air or water to solidify, forming flexible, lightweight PP fibers.
• Polysteel Fiber Processing: Polysteel fibers (a composite of polyester and high-strength steel micro-filaments, or high-tenacity polyester engineered for steel-like tensile properties) are unwound from large spools. These fibers are pre-stretched to align their molecular structure, enhancing tensile strength and reducing post-production elongation.
• Fiber Blending & Stranding: PP fibers and polysteel fibers are blended in a controlled ratio (tailored for balance of strength, flexibility, and corrosion resistance). The blended fibers are then twisted into small "yarns" using a stranding machine, ensuring consistent fiber distribution to avoid weak points.

Step 2: 3-Strand Twisting (Core Formation)

• Yarn Spooling: The blended yarns are wound onto large spools, which are mounted onto a 3-strand twisting machine. Each spool feeds yarn into one of three separate strand-forming units.
• Primary Strand Twisting: Each unit twists the blended yarns into a single, tight "primary strand"—the base component of the 3-strand rope. The twisting tension is calibrated to ensure each primary strand has identical thickness and strength (critical for even load distribution later).
• Triple-Strand Twisting: The three primary strands are fed into a secondary twisting machine, where they are twisted together in a clockwise or counterclockwise direction (depending on design specifications) to form the final 3-strand twisted structure. During this step, the machine maintains constant tension to prevent strand slippage and ensure a compact, uniform twist—this gives the rope its characteristic "spiral" appearance and structural stability.

Step 3: Diameter Calibration & Quality Inspection

• 6mm Sizing: As the twisted rope exits the twisting machine, it passes through a precision diameter gauge (calibrated to 6mm). If the rope is too thick or thin, the machine adjusts twisting speed or yarn feed rate in real time to correct the diameter.
• Strength & Elasticity Testing: Random samples of the rope are pulled through a tensile testing machine to verify breaking strength, elongation under load, and recovery (ability to return to original length after stress). Only ropes meeting predefined strength standards proceed to the next step.
• Surface & Structural Checks: The rope is visually inspected for defects (e.g., frayed strands, uneven twisting, fiber clumps) and scanned with a non-destructive testing tool to detect internal inconsistencies (e.g., air gaps between strands).

Step 4: Length Cutting & Winding

• 220m Length Cutting: The continuous rope is fed into a length-measuring machine, which counts meters and triggers a precision cutter to snip the rope into 220m segments. This ensures no length deviation (critical for applications requiring exact rope lengths).
• Spooling or Coiling: Each 220m segment is wound onto a cardboard or plastic spool (for easy storage and deployment) or formed into a tight, secured coil. Spools/coils are labeled with key specifications (length, diameter, material) for traceability.

Step 5: Post-Production Treatment (Optional)

• UV Stabilization Coating: For outdoor/marine applications, the rope may be sprayed with a UV-resistant coating to enhance resistance to sunlight-induced brittleness (polypropylene is naturally UV-sensitive, so this step extends service life).
• Abrasion-Resistant Finish: A thin, clear polymer coating may be applied to the rope’s surface to reduce friction damage, especially for applications involving contact with rough surfaces (e.g., rocks, metal).

2. Application Scope

1. Recreational & Outdoor Activities

• Camping & Hiking: Used to secure tents, tarps, or backpacks to trees/anchors. Its lightweight design (polypropylene) makes it easy to carry, while polysteel adds strength to withstand wind or rain-induced tension.
• Water Sports: Ideal for anchoring small watercraft (e.g., kayaks, canoes, paddleboards) in lakes or calm coastal areas. The 220m length allows for use in deep water, and polypropylene’s water resistance prevents weight gain or rot. It also works as a tow rope for inflatable toys (e.g., water tubes) or as a boundary line for swimming areas.
• Fishing: Used as a secondary line for securing fishing gear (e.g., nets, traps) to docks or boats. Its resistance to saltwater corrosion (polysteel + polypropylene) ensures durability in marine fishing environments.

2. Agricultural & Horticultural Use

• Crop Support: Tied to stakes or trellises to support climbing plants (e.g., tomatoes, beans, grapes). The 3-strand twist provides flexibility to adjust as plants grow, while polysteel’s strength prevents breakage under the weight of fruit/vegetation.
• Livestock Enclosures: Used to create temporary fences or secure gates for small livestock (e.g., chickens, goats). Its lightweight nature makes installation easy, and polypropylene’s resistance to manure or farm chemicals avoids degradation.
• Hay & Feed Securement: Wrapped around hay bales or feed sacks to keep them stable during transport or storage. The 220m length allows for securing multiple bales in a single run.

3. Light Industrial & Construction Tasks

• Job Site Marking: Strung between posts to mark off construction zones, hazards (e.g., holes, trenches), or pedestrian paths. Its visibility (often available in bright colors like orange/blue) and 220m length make it suitable for large sites.
• Light Equipment Tying: Secures small tools (e.g., hammers, drills) or materials (e.g., lumber, pipes) to scaffolding or trucks. The 3-strand twist holds knots tightly, preventing equipment loss during transport.
• Temporary Rigging: Used as a tag line to guide lightweight materials (e.g., small metal beams, drywall) during lifting. Polysteel’s strength ensures it can handle the material’s weight, while polypropylene’s flexibility allows for precise control.

4. Marine & Coastal Applications (Light-Duty)

• Dock & Marina Tying: Secures small boats or dinghies to docks in calm waters. The 220m length is sufficient for most marina slip depths, and the rope’s saltwater resistance prevents corrosion. It also works as a fender line to protect boat hulls from dock impact.
• Buoy & Marker Lines: Used to anchor floating buoys (e.g., navigation markers, swimming area buoys) in lakes, rivers, or coastal inlets. The 3-strand structure resists tangling, and the 220m length accommodates varying water depths.

5. Household & DIY Projects

• Garden & Yard Work: Used to hang bird feeders, outdoor lights, or plant baskets. Its weather resistance (UV coating optional) ensures it lasts in outdoor conditions.
• Home Repairs: Temporarily secures loose items (e.g., a broken fence panel, a sagging gutter) until permanent repairs are made. The 220m length provides enough rope for multiple small projects.
• Crafts & Decor: Woven into outdoor decor (e.g., patio railings, garden trellises) or used for DIY projects (e.g., homemade swings for children, pet toys). Its twist texture adds visual interest, while polypropylene’s durability ensures long-term use.

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.