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FIBRE ROPE
POLYESTER › Polyester is very close to Nylon in strength when a steady force is applied › Unlike nylon, polyester stretches very little and therefore cannot absorb shock loads › It is as equally resistant as nylon to moisture and chemicals › Is superior in resistance to abrasion and sunlight and is the best rope material for outdoor › Easy to dye - particular lines can be colour coded for ease of recognition › Soft feel for handling but a little heavier than Nylon › Typically only lose 10% of its breaking strength after 2 years of outdoor use › Does not soften progressively with a rise in temperature › Minimal strength loss when wet › Has a very high resistance to the degrading effects of sunlight and weather › It is not susceptible to attack by rot and mildew › Unlike nylon, polyester is resistant to acids and attack by alkalis › Is sensitive to hot caustic soda, concentrated ammonia, concentrated sulphuric acid › Has resistance to organic mineral and nitric acids, oxidizing agents, diluted alkali
MECHANICAL PROPERTIES: › Specific gravity: 1.38 g/cm3 (Doesn’t float on water) › Melting point: 225-240°C › Resistance to short term Heat: 170°C › Tensile Strength of Polyester: 115 kg/mm2 › Elongation at break points: 10-17% › Ultra Violet (UV) resistance: Excellent › Resistance to Alkalis: Good at room temperature › Resistance to Acids: Predominantly good
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MATERIALS HANDLING TECHNICAL MANUAL | VOL. 4
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