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- From: blgardne@javelin.sim.es.com (Dances With Bikers)
- Subject: Re: KEVLAR suits, any good?
- Message-ID: <BxtDF1.GGu@javelin.sim.es.com>
- Reply-To: blgardne@javelin.sim.es.com
- Organization: Evans & Sutherland Computer Corporation
- References: <1992Nov14.033354.1@slc.slac.stanford.edu> <1992Nov15.210237.28759@informix.com>
- Date: Mon, 16 Nov 1992 14:54:37 GMT
- Lines: 57
-
- johng@informix.com (John Galloway) writes:
-
- > DuPont said that
- >KEVLAR is NOT particulaly strong in abrasion resistance. So its great
- >for impact, or tensile strength (like bullet proof vests, or thread in
- >anything) but its not going to stand up to well if you grind it into the
- >highway. Now it might not be any WORSE than other substitutes, but
-
- It's not, in fact Kevlar is better than nylon, according to Cycle
- magazine's tests. (See below)
-
- >(according to the article) it is not as abbrasion resistant as good old
- >leather.
-
- True.
- ===========================================================================
- In the Sept. 1988 issue of Cycle they "road tested" several grades of
- leather, nylon and Kevlar. The two tests were dragging the material at
- 50 mph until it failed, and running a sample on an abrasion tester
- until failure.
-
- At 50 mph the results were:
-
- "Natural Armor"
- 3 oz leather 86' 0"
-
- "Strong Synthetics"
- Kevlar 22' 1"
- Codura Nylon 18' 3"
-
- The Rest
- 1.75 oz leather 4' 4"
- 2.25 oz suede 4' 3"
- Denim, 2 year old 4' 0.5"
- Denim, new 3' 10"
- Ballistic Nylon 3' 10"
-
- The results were a bit different on an abrasion tester, but the overall
- ranking was 3 oz leather, then the synthetics, and far behind those were
- denim and thin leather. Note that the best synthetics are 1/4 as effective
- as HEAVY leather, while lightweight leather is considerably worse than the
- synthetics, and far worse that heavy leather. Of course multiple layers
- of any material is better than a single layer.
-
- Another point not covered by the table is that a material with a hard,
- slick finish is important because it resists snagging and tearing. The
- reason that Cordura nylon did so much better than the thicker Ballistic
- nylon is that the coarse weave of the Ballistic caught on a flaw in the
- road, and tore. The suede finish leather suffered a similar fate on the
- road. On the other hand, Ballistic nylon did much better on the abrasion
- tester where snagging was not an issue.
- ===========================================================================
- --
- Blaine Gardner @ Evans & Sutherland blgardne@javelin.sim.es.com BIX:blaine_g
- 580 Arapeen Drive, SLC, Utah 84108 Favorite road signs:
- Dumper of Dirtbikes #46 FJ1200 Winding Road Next 77 Miles
- My other motorcycle is a Quadracer Caution: Passing Areas Not Marked
-