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Detonating cord (also called detonation cord, detacord, detcord, blasting rope, or primer cord) is a thin, flexible plastic tube usually filled with pentaerythritol tetranitrate (PETN, pentrite). With the PETN exploding at a rate of approximately 6,400 m/s (21,000 ft/s), any common length of detonation cord appears to explode instantaneously.
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 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]
Releasing the cord loop by removing the cable with a tug causes the three-ring system to cascade free and quickly disconnect the riser from the harness. Each ring in the series multiplies the mechanical advantage [ 3 ] of the loop of cord that is held in place by the semi-rigid cable (a Lolon-F or Teflon impregnated plastic coated steel cable ...
A friction hitch or knot used to put a loop of cord around a rope, applied in climbing, canyoneering, mountaineering, caving, rope rescue, and by arborists. Rolling hitch (Taut-line hitch) Schwabisch hitch: A friction hitch tied around a thicker rope that can slide while unloaded, but locks when loaded. Similar to the Prusik: Todd-Kramer hitch