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Melted rope after a fall 24-Oct-2012 At 3:31:28 AM bladeso

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The melt probably happened from a loosely tied knot. As the knot cinched down rapidly the friction generated some heat. Nylon has a pretty low melting point. The mantle (sheath) is doing what's it's supposed to do protect the kern (core). Hence the title kernmantle ropes. That what really protects our asses from the fall. I wouldn't worry about it judging by your description of the rough patches. If you are really worried about it feel the rope for any deformities on the inside of the rope by rolling it around. If you ever feel an internal deformity I'd chop that part out but it's got to be pretty drastic to feel that sort of thing. You're describing a friction burn just make sure your tie-in knot ( whichever you use) is good and snug.
KB