1. Basic Physical Parameter Chart

2. Key Performance Comparison

Tensile Strength (Same Diameter)

1. Nylon Rope: Medium-high tensile strength; strength decreases sharply by 30% when soaked in water.
2. Polyester Rope: Stable tensile strength; only 10% strength loss after water soaking, no permanent deformation under load.
3. PP Rope: Lowest tensile strength; requires thicker diameter to bear the same load.

Elongation & Shock Absorption

1. Nylon Rope: Elongation rate 10%~40%, outstanding shock absorption. Perfect for towing and mooring to buffer sudden impact; the downside is excessive stretch under heavy load which causes positioning deviation.
2. Polyester Rope: Elongation rate 5%~10%, moderate elasticity with minimal deformation after force release, ideal for precise lifting and mooring positioning.
3. PP Rope: Elongation rate 8%~15%, average elasticity with limited shock-absorbing capacity.

Wear Resistance & UV Resistance (Outdoor Service Life)

1. Polyester Rope: Top-tier UV & wear resistance. Maintains stable performance for 3~5 years under continuous sunlight, the top choice for long-term marine & outdoor use.
2. Nylon Rope: Good wear resistance but vulnerable to UV rays. Will turn brittle within 2~3 years outdoors without protective sleeves.
3. PP Rope: Poor wear resistance & extremely sensitive to UV radiation. Only lasts 1~2 years under direct sunlight, only suitable for short-term temporary water operations.

Chemical & Seawater Corrosion Resistance

• PP Rope: Excellent resistance to acid, alkali and seawater erosion, perfect for fishery and marine operations.
• Polyester Rope: Stable against weak acid, weak alkali and seawater.
• Nylon Rope: Prone to hydrolysis after long-term immersion in strong acid, strong alkali or seawater, service life shortened drastically in permanent marine environments.

Cost Ranking (Low to High)

PP Rope < Polyester Rope < Nylon Rope

• PP Rope: Lowest cost, universal budget rope.
• Nylon Rope: Mid-range price, mainstream for vehicle rescue towing.
• Polyester Rope: Slightly higher cost, designed for long-duration marine mooring work.

• 3. Pros, Cons & Application of Each Rope

  1. PP Polypropylene Rope

  ✅ Advantages: Ultra-light, fully floatable, zero water absorption, resistant to seawater & chemicals, low cost, available in bright customized colors.

• ❌ Disadvantages: Low tensile strength, poor wear resistance, susceptible to sunlight aging, softens under high temperature, turns rigid in cold weather.

• Best Use Cases: Fishery farming, temporary river towing, general bundling, temporary dock floating cables, agricultural binding. Not recommended for heavy-load or long-term outdoor projects.

  2. Nylon PA Rope

  ✅ Advantages: Maximum elastic shock absorption, great wear resistance, high toughness, easy to tie secure knots. ❌ Disadvantages: Loses strength when soaked, sinks in water, ages fast under UV light, hydrolyzes after long seawater immersion.

• Best Use Cases: Vehicle kinetic recovery tow ropes, marine shock-absorbing mooring lines, safety climbing ropes, lifting slings where impact buffering is required.

  3. Polyester PET Rope

  ✅ Advantages: Superior heat resistance, strong anti-UV property, stable tensile strength wet or dry, minimal permanent deformation, balanced wear resistance, stable performance in seawater.

• ❌ Disadvantages: High density leads to sinking, low elasticity with no shock buffering, heavier self-weight.

• Best Use Cases: Long-term marine mooring cables, lifting slings, outdoor fixed guy lines, yacht rigging, mine fixed ropes. The premium option for permanent outdoor & marine installations.

  Quick Methods to Distinguish the 3 Rope Materials

• Water Float Test (Simplest Method) Drop rope into clean water: Floats on surface = PP rope; sinks straight down = Nylon / Polyester rope.

• Stretch Rebound Test (Tell Nylon & Polyester Apart) Stretch the rope firmly then release it: Snaps back to original shape with obvious rebound = Nylon rope; stays stretched with nearly no rebound = Polyester rope.

• Sunlight Aging Test Long-term outdoor exposure: Turns pale, brittle & easy to break = PP rope; surface fades with reduced toughness = Nylon rope; almost no visual or strength change = Polyester rope.

• Burn Identification (Most Accurate Check)

• PP Rope: Blue flame, no dripping molten plastic, faint paraffin wax smell, extinguishes slowly after leaving fire.
• Nylon Rope: Melts and drips white molten beads, burnt wool odor, self-extinguishes quickly away from flame.
• Polyester Rope: Thick black smoke, drips hard black molten particles, sharp sweet chemical smell, keeps burning briefly after removing from fire.