lightest available urethane-coated fabric
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Colin Krusor
(ckrusor) - M

Locale: Northwest US
lightest available urethane-coated fabric on 09/18/2010 15:16:39 MDT Print View

I have a project that requires bonding a waterproof fabric to cuben. I don't know of an adhesive that will bond a silicone-coated fabric to the mylar surface of cuben fiber, and melamine or polycarbonate-coated kite and spinnaker fabrics are not reliably waterproof, so I'm hoping to find a lightweight (<2oz after coating), urethane-coated nylon or polyester fabric. I checked the sources I'm familiar with (thru-hiker, rockywoods, oware, seattle fabrics, etc.), but didn't find anything lighter than 3oz/yard (70D stuff). Any tips?

Chris Lucas
(ChemE) - F

Locale: SC
Bender? on 09/18/2010 19:12:10 MDT Print View

Bender uses some 30D stuff doesn't he? Maybe see if he can make it available by the yard?

Colin Krusor
(ckrusor) - M

Locale: Northwest US
30D heat-sealable nylon on 09/18/2010 21:00:48 MDT Print View

The white, 30D heat-sealable nylon that Bender uses (which is essentially the same as the stuff available from Seattle Fabrics) would work but it weighs about 3oz/yard (with some batch variation). I don't expect to find urethane-coated nylon in the silnylon weight range, but I hope to find something lighter than the heat-sealable stuff...

Chris Lucas
(ChemE) - F

Locale: SC
I stand corrected on 09/18/2010 21:17:55 MDT Print View

Oh interesting. Except for cuben I'm a fabric idiot.

Tim Marshall
(MarshLaw303) - MLife

Locale: Minnesota
Re: I stand corrected on 09/18/2010 22:33:28 MDT Print View

would cuben work as the waterproof fabric? not sure your application or budget but cuben can be bonded to cuben and i am sure it would be the lightest/strongest option but don't know your application.

Also the 70D stuff should only weigh 2.2oz/yd2

-Tim

Edited by MarshLaw303 on 09/18/2010 22:34:19 MDT.

Colin Krusor
(ckrusor) - M

Locale: Northwest US
2.2oz 70D urethane-coated nylon on 09/19/2010 12:10:40 MDT Print View

Thanks for the tip, Tim. 2.2oz is acceptable, I think. Where did you see that material?

I'm only considering coated nylon instead of cuben because I'd like to put abrasion-resistant patches on a down-filled cuben parka (a project in its second year that may never actually yield a finished garment).

Dan Durston
(dandydan) - M

Locale: Cascadia
Cuben on 09/19/2010 16:32:53 MDT Print View

The heavier weights of cuben have much thicker mylar layers as I'm sure you know. The new 1.2oz cuben uses the same thicker mylar membrane as 1.5oz but with less spectra. 1.5oz cuben is really tough so this should be too. Since abrasion resistance is what you're going for, this seems like a good choice. I feel comfortable using 1.5oz cuben as a shelter floor without any additional groundsheet. You can buy 1.2oz and 1.5oz cuben at Zpacks.com for $28/yd.

Colin Krusor
(ckrusor) - M

Locale: Northwest US
Heavier cuben on 09/20/2010 01:31:47 MDT Print View

Dan, I think you are probably right in suggesting that cuben will be competitive in abrasion resistance with coated nylon at any given weight (and superior in tensile strength). 1.5oz cuben would probably serve me as well or better than coated nylon of equivalent weight. Thanks for the suggestion. I'll post my observations as this project (gradually) progresses.

Tim Marshall
(MarshLaw303) - MLife

Locale: Minnesota
Re: 2.2oz 70D urethane-coated nylon on 09/20/2010 08:23:53 MDT Print View

1.9oz 70D nylon ends up running about 2.2oz after the coating. Quest, OWFINC.com and all the others have a material like this and i have made a lot of packs from it with never a tear, scuff or other problem aside from pine sap sticking to it, but that will happen to anything.

Again, i agree that 1.2oz cuben is the lightest/toughest option, just have to choose cost vs weight. Weight wins!

-Tim