anyone tried dyneema tree straps?

[Rain Man]

... although none of them have the weight per foot that I found but all were 3k+ break strength...

If weight per foot is not a concern, you can get plenty of polyester straps with 3k+ break strength.

[OCDave]

With all due respect, It seems you're looking for a solution to a problem that doesn't exist.

What do you expect to gain over polyester straps?

I expect the OP was feeding a spirit of exploration. I have that spirit and non-existent problems. I typically feed them both w/titanium shipped directly from Lancaster County, PA.

[Wanderlost]

Dyneema straps would solve the problems created by Kevlar straps: Stronger,lighter, hydrophobic, and more UV resistance. http://www.bainbridgeint.com/Variant...tem=PRD-900174

I found them as well. Unfortunately, the webbing itself isn't listed in any of their subsidiary catalogs (that I found). I'm scared to see what the price compared to polypro or Kelvar would be though. Consider the prices for other Dyneema based products: 7/64" Amsteel is .20 per foot. CF is about $12 a half (roughly $8 per linear foot...not that you can buy it that way.). Zing-it/Lash-t .16 per foot when bought by the 180' spool. I imagine the webbing, since there don't seem to be many places that have it in suitable widths, would be pretty cost prohibitive.

[gmcttr]

Dyneema straps would solve the problems created by Kevlar straps: Stronger,lighter, hydrophobic, and more UV resistance. http://www.bainbridgeint.com/Variant...tem=PRD-900174

OP hadn't mentioned kevlar at the time of my question.

I expect the OP was feeding a spirit of exploration. I have that spirit and non-existent problems. I typically feed them both w/titanium shipped directly from Lancaster County, PA.

I'd like to think I have that spirit of exploration as well. However, in this case, I suspected availability in less than full rolls would be minimal and there's a fair chance of incompatibility with some hardware.

For the best compromise between price, weight, compactness. compatibility and availability, quality 1500 lb polyester webbing is going to be hard to beat. Therefore I asked "What do you expect to gain over polyester straps?" in an attempt to learn which of these priorities the OP hoped to improve on....which was answered in post #7 providing better parameters for a discussion.

[genixia]

This just isn't economically feasible at this time.

I did a lot of research before concentrating on kevlar as the candidate for the next big thing in hammock suspensions. Ultra High Molecular Weight Polyethylene (UHMWPE), branded as Dyneema and Spectra, is a superb material in many respects but suffers from one weakness - it has a low melting point (as do all forms of polyethylene). For our requirements that isn't a problem, but it is for the other applications that typically make webbing and cordage available on the market.

UHMWPE webbing used in climbing applications are woven with nylon or polyester to introduce more abrasion resistance. The cross-section of the webbing is also tailored for climbers' ease-of-use and typically to meet a 22kN (5000lbs) tensile rating. The end result is that climbing slings are no good to us. They aren't wide enough for LNT purposes and about as heavy as the polyester they would replace.

UHMWPE webbing used in industrial applications are extremely heavy duty. If you wanted a sling to lift diesel engines into ships you could probably find one made out of UHMWPE. Yes, it would be extremely lightweight in industrial terms, but not something you'd want in your backpack.

Aramids have a market segment that drives availability in the widths, weights and strengths that are ideal for our use. The Kevlar tape that I recommended to Dutch is only available to us as a direct result of that market existing. MIL-T-87130 was developed to specify a range of tapes used in parachutes, a sizable market where weight and performance are both important. This means that we just needed to find a tape in that Milspec suitable for our needs and a vendor who made it. Even so, as observed above, it is still pricey when compared to polyester. (Although any time a backpacker halves the weight of an item in their pack for under $15, that's a win.)

I still haven't given up totally on the idea of UHMWPE treestraps, but kevlar in the backpack meets all my needs. Chasing UHMWPE would only be for the academic exercise of hitting the limit.

[SimonMc]

I did look into UHMWPE (Dyneema) webbing over here in Australia but it was just too expensive for very little gain.

[genixia]

One other observation - that Bainbridge UHMWPE webbing doesn't have any weight specified. Napkin math based on its 4000lb rating and UHMWPE being 40% stronger than Kevlar suggests that it is unlikely to be lighter than the 2000lb Kevlar that Dutch stocks.

[Armor Like Fire]

I'm not conserned about Kevlar at all it sounded great until the uv issue. Like I said I'm out for quite a while at a time sometimes and I don't want the straps rotting on me haa I know their might not be a whole lot of difference between dyneema webbing and poly, but the not absorbing as much moisture would be nice. But mostly I was just corious if anyone had any dyneema ones and how they liked them.

[muckypops]

My brain hurts from reading this thread.

[latriper]

My brain hurts from reading this thread.