Our Ropes

General Characteristics of Man-Made Fibers

	Nylon	Polyester	Polypropylene	Manila
Fiber strength Grams per denier	8.0 - 9.0	6.5 - 8.5	6.0 - 7.5	5.0
Repeat Loading Characteristics	Excellent	Excellent	Good	Poor
Ability to Float	No	No	Yes	No
Elongation at Breaking Point	35%	22%	24%	27%
% of Water Absorption into Fibers	Up to 9%	less than 1%	0%	up to 100% of rope weight
Sunlight Deterioration	Some	Very Low	Some	High
Surface Abrasion Resistance	Very Good	Excellent	Good	Good
High Temperature Properties	Melts @480°F	Melts @482°F	Melts @330°F	Loses strengthover 180°F
Effects of Cold Temperature	Slight Increase in strength to -5°F	Slight Increase in strength to -40°F	Becomes Brittle @ -40°F	Begins to split & Fracture below -32°F
Flammability	Melts First	Melts First	Melts First	Burns like wood

	Nylon	Polyester	Polypropylene	Manila
Service Life Factor Manila = 1	2-5	3-5	2-3	1
Cost per Pound Manila = 100	187	178	102	100
Cost per Foot Manila = 100	179	201	68	100
Cost per Foot Factoring Service Life Manila = 100	51	50	27	100
Cost per Foot with Working Stretch Factor Manila = 100	113	163	52	100
Cost per foot with both working strength and service factor Manila = 100	32	40	21	100

Para asistencia en español favor contactar a Cecilia: cpadilla@unicordcorp.com