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31

02 - FIBRE ROPE

Characteristics & Properties of Fibres

Fibre

Sisal

Manila (Abaca)

Nylon, Perlon etc.

Constitution

Agave Sisalana

Musa Textilis

Polyamide (Synthetic)

Description

A hard fibre, strong, nearly white

colour obtained from leaves of the

sisal plant.

Strongest of all the vegetable fibres

obtained from a tree of the banana

family in the Philippine Islands, 1-2m

long fibre which is light in weight,

lustrous, cream/white - brown.

Soft and silky, bright lustre.

Continuous filament and staple,

resistant to abrasion and bacteria.

Transparent strong fibre of circual

cross-section.

Reaction

to Heat

Burns as fibre touches flame -

supports combustion.

Critical temperature 149°C after

which fibre burns at flame - supports

combustion.

Will not burn - softens at 235°C

leaves a bead and has a celery

smell.

Sensitive to

Mineral acids, paints, detergents,

chemicals, salts, fats, oils, solvents,

weathering, sunlight, fungi and

moisture.

Mineral acids, paints, detergents,

chemicals, salts, fats, some oils,

solvents, weathering, fungi and

moisture.

Phenols, strong acids,

concentrated formic acid, sunlight.

Resistant to

Volatile petroleum solvents,

batching oils and lkalis.

Volatile petroleum solvents,

batching oils and alkalis.

Acetone, organic solvents,

mineral and/ or organic acids.

Dry

13% ext.

causes rupture.

Wet strength

less than dry.

13% ext. causes

rupture.

Wet strength

less than dry but

better than sisal.

Nylon 6.6

30-42% ext.

causes rupture.

Wet strength

approx. 10%

less than dry.

Wet

15% ext

causes rupture.

15% ext causes

rupture.

27-34% ext.

causes rupture.

Fibre

Terylene, Dacron, etc.

Polypropylene

Polyethylene

Constitution

Polyester

Polypropylene

Polyethylene

Description

Soft and silky, bright lustre.

Continuous filament and staple,

abrasion resistance second to nylon,

excellent resistance to sunlight,

weathering and bacteria.

Continuous filament and film. High

strength and toughness and good

resistance to sunlight if UV inhibitors

are used. Unaffected by changes in

relative humidity and water.

Continuous filament and

staple, very tough, fungi resistant.

Reaction

to Heat

Melts at 260°C and leaves hard

balls and has an aromatic smell.

Shrinks rapidly from flame, curls

and melts; ignites with difficulty. Has

low melting point 165°C.

Melts, shrinks and curls from

flame then softens at 110°C.Burns

rapidly.

Sensitive to

Hot caustic soda, concentrated

ammonia, concentrated sulphuric

acid.

Bleaching agents (sodium

hypochlorite), cleaning agents

(trichloroethylene).

Xylene at 93°C. Deteriorates on

very long exposure to sunlight or

heat. Inhibitors may prevent this

from happening. Hot nitric acid or

sulphuric acid.

Resistant to

Organic mineral and nitric acids,

oxidising agents, dilute alkali.

Most alkalis and acids,

solvents and oxidising agents.

Most acids, alkalis, grease,

oil, organic solvents and water.

Dry

Approx.

25-35% ext.

causes rupture.

Wet strength

equal to dry.

25-30% ext.

causes rupture.

Wet strength

equal to dry.

Approx.

50% ext.

causes rupture.

Wet strength

equal to dry.

Wet

Approx.

35% ext.

causes rupture.

Same as dry.

Same as dry.