3 Strands Twisted Polypropylene Rope

Production Process

1. Polypropylene Resin Preparation and Extrusion: High-quality polypropylene (PP) resin pellets are selected and fed into an extruder. The pellets are heated to a molten state (approximately 180–230°C) within the extruder, where they are mixed uniformly. The molten PP is then forced through a spinneret— a metal plate with multiple small holes—to form continuous, thin filaments. These filaments are cooled rapidly using air or water to solidify them into strong, flexible strands.
2. Filament Drawing and Stretching: The solidified PP filaments undergo a drawing process, where they are pulled through a series of rollers at a controlled speed. This stretching aligns the polymer molecules within the filaments, enhancing their tensile strength and reducing their diameter. The drawn filaments are then wound onto bobbins, ready for the next stage.
3. Strand Formation: The drawn filaments are grouped together in specific quantities to form three individual strands. Each group of filaments is twisted (plied) in a consistent direction (either right or left) to create cohesive, uniform strands. The twisting tension is carefully regulated to ensure each strand has equal strength and thickness.
4. Rope Twisting (Closing): The three pre-formed strands are fed into a closing machine, where they are twisted together in the opposite direction of their individual twist (counter-twisting). This counter-twist locks the strands tightly together, forming a strong, stable 3-strands twisted rope. The twisting process is adjusted to achieve the desired rope diameter and flexibility.
5. Cutting, Winding, and Quality Control: The continuous rope is cut into standard lengths based on market requirements. Each length is wound onto spools or reels for easy storage and transportation. Final quality checks include testing tensile strength, checking for uniform diameter, and inspecting for any defects such as frayed strands or uneven twisting.

Key Features

• Lightweight and Easy to Handle: Polypropylene's low density makes this rope significantly lighter than many other synthetic ropes, simplifying transportation, storage, and manual handling. Even in longer lengths, it remains manageable for everyday use.
• Excellent Water Resistance: The rope is inherently water-repellent and does not absorb moisture, preventing issues like weight gain, rotting, or mildew growth. This property makes it ideal for use in wet or aquatic environments.
• Good Tensile Strength for General Applications: The 3-strands twisted construction provides reliable tensile strength suitable for a wide range of light to medium-duty tasks. It can withstand steady loads without excessive stretching or breaking.
• Resistance to Chemicals and UV Radiation: Polypropylene is naturally resistant to most common chemicals, oils, and solvents. Additionally, it maintains stability under prolonged sun exposure, resisting UV-induced brittleness or discoloration.
• Cost-Effective and Durable: Compared to many other synthetic ropes, 3-strands twisted polypropylene rope offers a favorable balance of performance and affordability. Its durability ensures a long service life even with regular use in various environments.

Application Scope

• Agricultural Uses: Widely used in farming for tasks such as tying crops to supports, securing hay bales, bundling branches, and marking field boundaries. Its water resistance makes it suitable for outdoor use in all weather conditions.
• Marine and Aquatic Applications: Ideal for lightweight marine uses including securing small boats, marking swimming areas, floating buoys, and as temporary anchor lines for canoes or kayaks. Its buoyancy and water resistance prevent sinking and degradation.
• Construction and Industrial Light-Duty Tasks: Used on construction sites for tying down materials, marking work zones, securing scaffolding accessories, and bundling pipes or lumber. Its chemical resistance makes it suitable for use around building materials.
• Recreational and Household Uses: Popular for camping (as tent ropes or gear ties), gardening (supporting plants), DIY projects, and general household tasks like securing items during moving or storage. Its lightweight nature makes it easy to keep on hand for various needs.
• Packaging and Shipping: Employed in packaging for bundling boxes, securing pallet loads, and tying together goods for transportation. Its strength and flexibility ensure items remain stable during transit without damaging packaging materials.

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

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.