Polyester ropes is a synthetic material that is used for many different tasks, and polyester rope is often chosen because polyester rope has specific physical property. One important property of polyester rope is that polyester rope has low stretch, which is a stretch elongation of 10 to 15 percent. This low stretch are useful for dock lines and halyards because low stretch ensure that the rope stays steady under tension.
When you select polyester rope, you must understand the difference between breaking strength and safe working load. Breaking strength is an amount of force that causes the rope to break, but the safe working load is the amount of force that is safe for everyday use. Many manufacturers calculates the safe working load by dividing the breaking strength by five, and this calculation provides a safety buffer for knots, wear, and unexpected wind gusts.
Polyester Rope: Properties, Uses and Care
For example, a half inch polyester rope has a breaking strength of 5,300 pounds, but the safe working load for that half-inch polyester rope is 1,060 pounds. Additionally, a half-inch polyester rope weigh 7.5 pounds per hundred feet, so a person can manage teh weight of the half-inch polyester rope during use. Polyester rope has several advantage when polyester rope is used in different environments.
Polyester rope sink in water, and because polyester rope sinks, polyester rope help to keep propellers clear of the rope. Polyester rope is also resistant to ultraviolet (UV) radiation, so polyester rope does not become brittle in the sun like polypropylene rope become brittle in the sun. Furthermore, polyester rope has low water absorption, which is less than half a percent, so polyester rope do not gain significant weight or lose it’s strength when polyester rope becomes wet.
Nylon rope stretch more than polyester rope, and nylon rope also absorbs more water than polyester rope. Manila rope is also different because manila rope can rot, but polyester rope do not rot. The construction of polyester rope determine how the polyester rope performs.
Three strand twisted polyester rope is a common construction, and you can easily splice three-strand twisted polyester rope by hand using a tool called a fid. Double braid polyester rope has a smooth outer jacket and a braided core, so double braid polyester rope move smoothly through blocks. Kernmantle polyester rope has a tough outer sheath that protect a load-bearing core, and kernmantle polyester rope is resistant to abrasion.
If you choose the incorrect construction, you may experience slippage or chafe, but if you choose the correct construction, the polyester rope will function as intended. There are many specific use for polyester rope based off the properties of polyester rope. You can use polyester rope for dock lines because dock lines require low stretch to keep a boat snug against a piling.
You can use polyester rope for halyards because halyards need to hoist sails without the sails flapping. For anchor lines, you can pair polyester rope with a chain, and the polyester rope will handle the stretch of the rode. Polyester rope is also used for off-road recovery tow ropes, for arborist rigging, and for safety lines in fall arrest applications.
To maintain polyester rope, you must follow specific maintenance step. You should rinse polyester rope with fresh water after the polyester rope has been in saltwater to remove salt crystals. You must inspect polyester rope for fuzzy spot or stiff sections, because fuzzy spots and stiff sections indicate that the polyester rope is damaged.
You should avoid contact with acid because acids cause the fibers of the polyester rope to break down quick. You should retire polyester rope if the polyester rope becomes stiff, because a stiff polyester rope is no longer safe to use. You can use heat-melting to seal the ends of synthetic polyester rope, or you can use eye splices and thimbles to protect the ends of the polyester rope from chafe.
In summary, polyester rope is a consistant material that perform well in wet, dry, and sunny conditions. While nylon rope may have a higher raw strength in some instances, polyester rope is more consistent. You should of consult a strength chart to match the diameter of the polyester rope to your specific load requirements, and you should select the polyester rope that match the specific needs of your task.
