|Fibre||Tenacity of dry fibre (gm/denier)||Wet strength compared to dry strength||Rope shock load absorption||Specific Gravity||Able to float||Strength/ Weight ratio (av.)||Elongation & Creep|
|Sisal||4-5||Up to 120%||Poor||1.5||No||Fibre elongation: Dry 2.9%, Wet 3.4%.
Rope elongation: Dry 13%, Wet 16%.
Extension causes rupture.
|Manila||5-6||Up to 120%||Poor||1.5||No||Fibre elongation: Dry 2.8%, Wet 3.2%.
Rope elongation: Dry 13%, Wet 15%.
Extension causes rupture.
|Polyethylene||6||100%||Good||0.95||Yes||2.10||High tenacity. Good recovery after stretch and extension at break of 50%. High creep.|
|Polypropylene||6.5||100%||Very Good||0.91||Yes||2.50||High tenacity. Good recovery from stretch and elongation at break for ropes is 25-30%. High creep.|
|HT Polyester||7-10||100%||Very Good||1.38||No||2.25||Elongation 35% at break. Low creep.|
|Nylon||9||85-90%||Excellent||1.14||No||3.00||Elongation Dry 40%. Wet 35%.
|Aramid (Kevlar®)||18-26||95%||Fair||1.44||No||Elongation 4% at break. Very low creep.|
|Technora®||28||100%||1.39||No||Elongation 4.5% at break. Low creep.|
|UHMwPE||28||100%||0.97||Yes||Elongation 2-5% at break.|
Chemical Resistance & Degradation
|Fibre||Effects of acids||Effects of Alkalis||Effect of Organic Solvents||UV resistance in sunlight||Other||Resistance to aging*|
|Sisal||Degradation of acids in high concentration or temperature.||Resistant||Resistant||Good||Degradation by sea water, paints, detergents, chemical salts and fats||Good|
|Manila||Degradation of acids in high concentration or temperature.||Degradation by alkalis.||Resistant||Good||Degradation by paints, detergents, chemical salts and fats||Good|
|Polyethylene||Very resistant||Very resistant||Soluble in hot chlorinated hydrocarbons.||Good (UV stabilised)||Excellent|
|Polypropylene||Very resistant||Very resistant||Soluble in chlorinated hydrocarbons.||Good (UV stabilised)||Excellent|
|HT Polyester||Resistant to most mineral acids. Disintegrated by 95% sulphuric acid.||No effect cold. Slowly disintegrated by strong alkalies at the boil.||Generally unaffected. Soluble in some phenolic compounds.||Excellent||Excellent|
|Nylon||Decomposed by strong mineral acids. Resistant to weak acids.||Little or none||Resistant, soluble in some phenolic compounds and in 90% formic acid.||Good||Excellent|
|Aramid (Kevlar®)||Resistant to weak acids. Degradation by strong acids & bases in high concentrations or temperatures.||Resistant||Fair||Degrades in Chlorine bleach.||Excellent|
|Technora®||Resistant to mineral and organic acids. Degrades in hydochloric, hydrobromic and sulphuric acids.||Resistant||Resistant||Resistant to sea water and steam. Sensitive to bleaching and sunlight.||Excellent|
|UHMwPE||Chemically inert except for strong oxidising acids.||Resistant||Resistant to cold alcohols, ethers, esters, ketones & bleaches.||High||Excellent|
* for properly stored rope
Rope Abrasion Resistance & Heat Reaction
|Fibre||Surface abrasion||Internal abrasion||Heat reaction|
|Sisal||Fair||Good||Burns as fire touches flame. Supports combustion.|
|Manila||Good||Good||Critical temp is 150°C after which fibre burns at flame. Supports combustion.|
|Polyethylene||Fair||Good||Softens 100°C. Melts 110°C – 120°C.|
|Polypropylene||Good||Good||Shrinks rapidly from flame. Curls and melts at 165°C.|
|HT Polyester||Excellent||Excellent||Softens 228°C. Melts 255°C.|
|Nylon||Very Good||Excellent||Softens 229°C. Melts 249°C – 260°C.|
|Aramid (Kevlar®)||Fair||Good||371°C decomposition|
|Technora®||Very Good||Very Good||500°C+ decomposition|