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Re: [ja1484] nylon life:
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slacklinejoe
Aug 30, 2007, 1:23 AM
Views: 1299
Registered: Nov 5, 2003
Posts: 1423
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As someone who works with nylon a lot in industrial application I feel compelled to post. Yes, nylon has a shelf life. It isn't just a strength issue but a elongation issue as well as other characteristics such as handling.
In the best conditions 5-10 years of non-use is the max most manufacturers will say the product is still in usable condition due to this breakdown. Do not underestimate the importance of elasticity in nylon products. Small differences in elasticity make a product much more unsafe than small differences in overall tensile strength.
Also, I'm not sure I quite agree with that 2% solid rule, many products differ. I wouldn't expect spectra/nylon runners and a rope to be exactly the same. Also, many products will have something of a function curve going on over time, such as 2% first year, 3% 2nd, 3% 3rd, 3%4th, and 8% 5th but year 6 could be a 10% reduction (those numbers are purely for example only).
For any type of life saving nylon product 8 years is a significant amount of it's life used up, when you add actual wear and tear on it, it's best to be conservatively safe than injured or dead. Besides, your talking about a $3 runner here -- really, is it that hard to let go?
(This post was edited by slacklinejoe on Aug 30, 2007, 1:40 AM)
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