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Parachute cord (also paracord or 550 cord when referring to type-III paracord) is a lightweight nylon kernmantle rope originally used in the suspension lines of parachutes. This cord is useful for many other tasks and is now used as a general purpose utility cord by both military personnel and civilians.
Kevlar (para-aramid) [2] is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora.Developed by Stephanie Kwolek at DuPont in 1965, [3] [2] [4] the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires.
The reef knot can capsize if one of its standing ends is pulled.. A knot that has capsized or spilled has deformed into a different structure. Although capsizing is sometimes the result of incorrect tying or misuse, it can also be done purposefully in certain cases to strengthen the knot (see the carrick bend [4]) or to untie a seized knot which would otherwise be difficult to release (see ...
The ends of the cord can be melted and/or crimped to prevent fraying. Patented SurvivorCord (MIL-SPEC 550 Paracord, with integrated fishing line, fire-starter, and snare wire.) There are also modern versions of parachute cord that include non-traditional survival strands within the core such as fishing line, fire tinder, and even snare wire. [5]
Pretzel link knot – in knot theory, a branch of mathematics, a pretzel link is a special kind of link; Prusik knot – friction hitch or knot used to put a loop of cord around a rope; Portuguese bowline a.k.a. French bowline – variant of the bowline with two loops that are adjustable in size; Portuguese whipping – a type of whipping knot
For spearguns, the constrictor knot is the usual knot used to secure modern, toggled, Dyneema, cord wishbones into the hollow, bulk-rubber loops, which are used to power the spear. Usually tied with braid, Kevlar or Dyneema cord of approximately 1.4-2mm diameter.