8 Strand Polypropylene Multifilament Vessel Anchor Mooring Towing Lifting Sling Rope Line Multifunctional Packaging Rope

Brand Name:JC MARINETIME
Certification:ISO / CE
Model Number:3 / 4 / 8 / 12 STRAND ROPE
Minimum Order Quantity:220 Meter
Delivery Time:5-20 days
Payment Terms:L/C, D/A, D/P, T/T, Western Union, MoneyGram
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Location: Qingdao Shandong China
Address: No. 59-8, Fuqian Road, Rizhuang Town, Laixi City, Qingdao City, Shandong Province
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Product Details

8 Strand Polypropylene Multifilament Vessel Anchor Mooring Towing Lifting Sling Rope Line Multifunctional Packaging Rope

1.PHOTOS


2. Main performance


MaterialPolyamide
Multifilament
Polyamide
Yarn
Polypropylene
Multifilament
PolypropylenePolyesterPolypropylene and
Polyester Mixed
Spec.Density1.14
no floating
1.14
not floating
0.91
no floating
0.91
Floating
1.27
no floating
0.95
Floating
Melting Point215℃215℃165℃165℃260℃165℃/260℃
Abrasion ResistanceVery GoodVery GoodMediumMediumGoodGood
U.V.ResistanceVery GoodVery GoodMediumMediumGoodGood
Temperature resistance120℃max120℃max70℃max70℃max120℃max80℃max
Chemical resistanceVery GoodVery GoodGoodGoodGoodGood

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

Specification
规格
PA Multifilament
锦纶复丝
PAYarn
锦纶
PP Multifilament
丙纶长丝
Polypropylene
丙纶
Polyester
涤纶
PET/PP Mixed
丙纶/涤纶混合绳
Dia.CirKtexKNKtexKNKtexKNKtexKNKtexKNKtexKN
直径圆 周线密度破断强力线密度破断强力线密度破断强力线密度破断强力线密度破断强力线密度破断强力
41/2103.7102.66.32.362.1122.97.02.8
63/4227.9226186.5175.9275.617.56.8
814013.84010.93211.43010.44810.03111.9
101-1/46221.26215.74716.84515.37615.648.518.2
121-1/28930.18924.16823.96521.711022.369.925.7
141-3/412140.012133.09532.99029.914831.295.134.7
16215851.915842.512140.711537.019539.812444.8
182-1/420064.320053.915551.914847.224549.815756.1
202-1/224779.224766.718962.618056.930362.319468.7
222-3/429994.029980.423175.022068.236774.723582.1
24335511235593.627387.726079.743789.627996.3
263-1/4417129417111.532010130592.2512105328113
283-1/2484149484127373115355105594120380130
303-3/4555169555143425132405120682134437148
324632192632161483146460132778154497167
364 - 1/ 2800240800200614182585166982190629210
4059872949872417562217202011215235776257
445-1/2119035111902899242668802421468275939308
486142041214203381092308104028017503291110364
526-1/2167047916703931281357122032520503841320424
567193055019304501491408142037123804391520489

Production Process

Step 1: Raw Material Preparation & Melting

High-quality polypropylene resin pellets (selected for marine and industrial durability) are the primary raw material. The pellets are first fed into a hopper and then conveyed to an extruder. Inside the extruder, the pellets are heated to a molten state (typically between 180°C–220°C) under controlled temperature to ensure uniform melting without thermal degradation. This molten polypropylene is then pushed through a spinneret—a metal plate with hundreds of tiny holes—to form continuous, thin filaments.

Step 2: Filament Cooling, Stretching & Texturing

The extruded filaments are immediately cooled with cold air or a water bath to solidify them into flexible, solid strands. After cooling, the filaments undergo a stretching process (draw ratio of 3:1 to 5:1) using tension rollers. This stretching aligns the polypropylene molecules, enhancing the filaments’ tensile strength and reducing elongation. For multifilament structure, multiple stretched filaments are then lightly textured (via air-jet or mechanical crimping) to improve cohesion between strands and enhance the rope’s flexibility.

Step 3: Yarn Plying (Strand Formation)

The textured polypropylene multifilaments are gathered and twisted into thicker, uniform yarns. These yarns are then plied together (usually 3–4 yarns per ply) to form the 8 individual strands required for the rope. Each strand is twisted consistently to ensure even thickness and strength—critical for maintaining load balance in the final rope.

Step 4: 8-Strand Braiding/Assembly

The 8 pre-formed strands are fed into a specialized braiding machine (with 8 bobbins arranged in a circular pattern). The machine interlaces the strands in a precise, repetitive pattern to create the 8-strand braided structure. The braiding tension is closely monitored to ensure the strands are woven tightly and uniformly, preventing gaps that could reduce durability or allow moisture retention. This step forms the core structure of the rope.

Step 5: Post-Treatment & Quality Inspection

After braiding, the rope undergoes post-treatment to enhance performance:

  • Heat Setting: The rope is heated briefly and then cooled to stabilize its structure, reducing shrinkage during future use (especially important for marine and lifting applications).
  • Surface Smoothing: A light calendaring or coating process may be applied to minimize friction and improve abrasion resistance (optional, based on end-use needs).

Finally, the rope is cut into standard lengths (e.g., 50m, 100m) and subjected to quality checks: tensile strength testing, elongation measurement, abrasion resistance assessment, and visual inspection for strand defects or uneven braiding. Only ropes meeting industrial standards proceed to packaging.

2. Application Scope

Marine & Vessel Operations

  • Vessel Anchoring: Suitable for anchor lines of small to medium-sized vessels (e.g., fishing boats, recreational yachts, workboats). Its polypropylene material is lightweight (floats in water, easy to retrieve) and resistant to saltwater corrosion, while the 8-strand structure provides sufficient strength to hold vessels against tides and winds.
  • Mooring Lines: Used to secure vessels to docks, piers, or buoys. The rope’s flexibility allows easy tying of secure knots (e.g., cleat hitch), and its abrasion resistance withstands friction from dock edges or boat hulls—ensuring long-term reliability in coastal or harbor environments.
  • Vessel Towing: Ideal for light to medium-duty towing of small watercraft (e.g., dinghies, jet skis) behind larger vessels. Its tensile strength handles towing loads, and polypropylene’s low water absorption prevents weight gain that could hinder towing efficiency.

Industrial Lifting & Rigging

  • Light-Duty Lifting Slings: Used as lifting slings for lightweight loads (e.g., small machinery parts, packaging materials, construction tools) in factories, warehouses, or construction sites. The 8-strand braided structure distributes load evenly, and polypropylene’s non-conductive property adds safety when working near low-voltage equipment. It is a cost-effective alternative to heavy metal slings for non-abrasive, low-load tasks.

Logistics & Packaging

  • Heavy-Duty Packaging Rope: Widely used in logistics for securing palletized goods, bundling large packages (e.g., furniture, industrial components), or reinforcing cardboard boxes during shipping. Its high tensile strength prevents load shifting, and polypropylene’s resistance to moisture and mildew protects goods from damage in humid storage or transit conditions. It is also easy to cut and tie, improving packaging efficiency.

Recreational & Outdoor Uses

  • Water Sports & Camping: Used in water sports (e.g., marking swimming areas, securing inflatable rafts) due to its buoyancy and water resistance. In camping, it serves as tent guy lines, gear-hanging ropes, or temporary clotheslines—its lightweight nature and durability making it easy to carry and reliable in outdoor weather.

Agricultural Applications

  • Farm Gear Securement: Used in agriculture for tying down hay bales, securing lightweight farm equipment (e.g., irrigation hoses, small tool racks), or creating temporary fences for small livestock. Its resistance to UV radiation and outdoor elements ensures longevity in open farm environments, and its flexibility allows adjustment to different farm structures.
China 8 Strand Polypropylene Multifilament Vessel Anchor Mooring Towing Lifting Sling Rope Line Multifunctional Packaging Rope supplier

8 Strand Polypropylene Multifilament Vessel Anchor Mooring Towing Lifting Sling Rope Line Multifunctional Packaging Rope

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