High Strength 4 Strands PP Danline Rope 8mm 220m

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

Production Process

1. PP Resin Melting & Extrusion: Start with high-quality polypropylene (PP) resin pellets, which are fed into an extruder. The extruder heats the pellets to a molten state (typically 180–220°C) under controlled temperature. The molten PP is then forced through a spinneret—a metal plate with tiny, evenly spaced holes—to form continuous, thin PP filaments. These filaments are cooled rapidly using air or water to solidify them, preserving their structural integrity.
2. Filament Drawing & Orientation: The solidified PP filaments are pulled (drawn) through a series of rollers at a higher speed than the extrusion rate. This drawing process stretches the filaments, aligns their molecular structure, and reduces their diameter. The result is stronger, more durable filaments with enhanced tensile properties—critical for achieving the “high strength” characteristic of the rope.
3. Strand Formation (Plying): The drawn PP filaments are grouped together and twisted into 4 individual strands (the “4-strands” structure). The twisting direction (e.g., right-hand or left-hand lay) is controlled to ensure uniform tension and consistency across each strand. Each strand is inspected for thickness and strength to meet the 8mm final rope diameter requirement.
4. Rope Closing (Strand Twisting): The 4 pre-formed strands are fed into a closing machine, where they are twisted together in the opposite direction of their individual lay (counter-twisting). This counter-twist locks the strands tightly, forming a cohesive, round 8mm-diameter rope. The twisting tension is precisely adjusted to balance flexibility and strength, preventing strand slippage or loosening.
5. Cutting, Winding & Quality Inspection: The continuous rope is cut into 220m lengths using a precision cutting machine. Each 220m section is wound onto spools or reels to facilitate storage and transportation. Final quality checks include testing tensile strength, measuring diameter consistency, and inspecting for surface defects (e.g., frayed strands, uneven twisting) to ensure compliance with high-strength standards.

2. 5 Key Features

• High Tensile Strength for Heavy Loads: The combination of drawn PP filaments and 4-strand twisted construction delivers exceptional tensile strength, allowing the rope to withstand heavy static or dynamic loads without breaking. This strength is particularly notable for its 8mm diameter, making it a compact yet robust option.
• Excellent Water Resistance & Floatability: As a polypropylene-based rope, it is inherently water-resistant— it does not absorb water, preventing weight gain, rot, or mildew even after prolonged immersion in freshwater or saltwater. Additionally, PP’s low density enables the rope to float on water, eliminating the risk of sinking and simplifying retrieval in aquatic environments.
• Good Abrasion Resistance for Durability: The 4-strand twisted structure creates a dense, smooth outer surface that resists abrasion against rough surfaces (e.g., concrete, metal, rocks, or wooden docks). It withstands repeated friction from handling or contact with harsh materials, reducing fraying and extending the rope’s service life.
• Lightweight & Flexible for Easy Handling: Compared to many other high-strength ropes, this PP Danline rope is lightweight, which eases transportation, storage, and manual handling—even for the full 220m length. Its flexibility allows for easy tying of knots (e.g., bowline, clove hitch) that hold securely, without the rope becoming stiff or brittle, even in cold or wet conditions.
• UV Stability for Outdoor Longevity: The PP material is formulated with UV inhibitors, protecting the rope from degradation caused by prolonged exposure to sunlight. It resists discoloration, brittleness, and loss of strength when used outdoors (e.g., in marine, agricultural, or construction settings), ensuring reliable performance over time.

3. Application Scope

• Marine & Boating Uses: Ideal for small to mid-sized boats as mooring lines, dock lines, or tender ropes. Its water resistance, floatability, and strength secure boats against waves and wind, while its flexibility simplifies docking. It is also suitable for marking swimming areas, securing marine equipment (e.g., fenders), or retrieving small items from water.
• Agricultural Applications: Used in farming and agriculture for tasks like securing hay bales, tying down farm equipment (e.g., tractors, harvesters) during transport, or supporting lightweight crops (e.g., tomatoes, grapes) with trellises. Its lightweight design eases handling in fields, and its water resistance stands up to rain or irrigation.
• Camping, Hiking & Outdoor Recreation: Perfect for camping as tent guy lines, securing tarps or shelters, or hanging food bags to avoid wildlife. Its lightweight and flexibility make it easy to pack in backpacks, while its strength supports small loads (e.g., camping gear). It is also used for marking trails or setting up temporary barriers in outdoor areas.
• Construction & Industrial Light-Duty Tasks: Suitable for light construction work such as securing construction materials (e.g., lumber, pipes) on job sites, marking off work zones, or supporting lightweight temporary structures (e.g., scaffolding netting). Its abrasion resistance withstands contact with construction materials, and its strength handles the demands of light load-bearing.
• Recreational Water Activities: Used in non-motorized water sports like kayaking, canoeing, or paddleboarding as a safety rope, tow rope for inflatable toys (e.g., water tubes), or anchor line for small watercraft. Its floatability ensures it stays visible on water, and its strength provides security for riders or equipment.

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.