Product Specification

Cheap 3 or 4 Strands Twisted pp Rope 100m 200m Customized Length Polypropylene Mooring Rope

Production Process

Step 1: Raw Material Preparation (Polypropylene Pellets)

• Start with high-quality, cost-effective polypropylene (PP) pellets—selected for their affordability, water resistance, and basic tensile strength, which align with the “cheap” positioning of the rope.
• The pellets are first fed into a drying machine to remove any residual moisture. This prevents bubbles or defects in the final fiber, ensuring consistent quality while keeping production costs low (no need for premium moisture-proof treatments).

Step 2: Fiber Extrusion and Drawing

• Dried PP pellets are melted in an extruder at a controlled temperature (typically 180–220°C). The molten PP is then pushed through a spinneret (a metal plate with tiny holes) to form continuous, thin PP filaments (called “tow”).
• The extruded filaments are immediately drawn (stretched) using a series of rollers at high speed. This drawing process aligns the PP molecules, enhancing the fiber’s tensile strength and reducing brittleness—critical for mooring applications, even in budget-friendly ropes. The filaments are then cooled with air to solidify.

Step 3: Stranding (Forming 3 or 4 Single Strands)

• The solidified PP filaments are gathered into bundles and twisted into single strands using a stranding machine. For 3-strand ropes, three separate bundles are twisted; for 4-strand ropes, four bundles are used.
• The twisting speed and tension are adjusted to ensure uniform strand thickness—avoiding weak spots while keeping production efficient (faster twisting reduces labor and energy costs, supporting the “cheap” pricing). Each single strand is wound onto spools for temporary storage.

Step 4: Final Twisting (Forming 3/4-Strand Rope)

• The spooled single strands (3 or 4) are fed into a twisting machine simultaneously. The machine twists the strands together in a helical pattern (opposite to the direction of the single-strand twist) to create the final twisted rope.
• This “counter-twisting” locks the strands in place, improving the rope’s structural stability and preventing unraveling—essential for mooring, where the rope must withstand constant tension. The twisting process is optimized for speed to minimize production time and costs.

Step 5: Cutting to Custom Lengths (100m, 200m, or Custom)

• After twisting, the continuous rope is wound onto large reels. A computer-controlled cutting machine then trims the rope into the desired lengths: standard 100m, 200m, or customized lengths (per customer requests).
• No additional premium finishing (e.g., heat-sealing for fray resistance) is added—instead, basic cut-end treatment (simple trimming) is used to keep costs low, while still ensuring the ends do not unravel immediately.

Step 6: Quality Check and Packaging

• A basic quality check is conducted to verify key parameters: length accuracy, strand uniformity, and minimum tensile strength (to meet basic mooring requirements). Defective ropes (e.g., uneven twisting, broken strands) are discarded.
• The finished ropes are packaged in low-cost materials (e.g., woven plastic bags or simple cardboard boxes) in batches. No fancy labeling or protective coatings are used—further reducing packaging costs and aligning with the product’s budget 

Application Scope

1. Recreational Small Boat Mooring (Freshwater/Sheltered Saltwater)

• Ideal for mooring small, lightweight watercraft such as kayaks, canoes, small fishing boats, or inflatable boats in calm, sheltered waters (e.g., lakes, ponds, or protected harbors).
• Its basic tensile strength and PP water resistance (no water absorption, no rot) meet the low-load demands of these vessels, while the affordable price makes it accessible for casual boat owners.

2. Temporary Docking and Buoy Securement

• Used for temporary docking tasks, such as tying small boats to floating docks, piers, or buoys during short stops (e.g., fishing breaks, passenger drop-offs).
• Customizable lengths (100m, 200m) allow flexibility for different dock distances, and its lightweight design makes it easy to handle and store when not in use. It is not suitable for long-term, heavy-duty docking in rough seas.

3. Agricultural and Farming Tying/securing

• Applied in agriculture for light-duty tasks: securing hay bales, tying down lightweight farm equipment (e.g., small irrigation pipes, tool storage covers), or reinforcing temporary fences for small livestock (e.g., chickens, rabbits).
• PP’s resistance to moisture and mild UV exposure (suitable for short-term outdoor use) prevents degradation from rain or sunlight, and its low cost makes it economical for large-scale, non-critical farm needs.

4. Construction Site and Industrial Light Tying

• Used in construction sites or warehouses for light-duty securing: bundling construction materials (e.g., wooden planks, PVC pipes), tying down temporary covers (e.g., for sand or gravel piles), or securing small tools to workbenches.
• Its basic strength handles low-load tasks, and the twisted structure ensures it stays tied securely. The 100m/200m lengths are practical for covering large areas of the site without frequent rope replacement.

5. Household and Recreational Outdoor Use

• Suitable for household outdoor tasks: securing patio furniture (e.g., chairs, umbrellas) during windy weather, hanging lightweight garden decorations (e.g., lanterns, bird feeders), or creating temporary lines for drying laundry in yards.
• It is also used in casual outdoor activities like camping (tying tent guylines for lightweight tents) or backyard games (e.g., setting up boundaries for badminton). Its affordability and ease of use make it a popular choice for non-professional, daily needs.

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