.61 Dyneema (CT1K.18) now at RSBTR

@jturner140 – I was just coming over to announce this. I remembered you asking about CT1K.18 a while back, so definitely wanted to get that one in. I’ll put some other DCF related news in another thread.

Neat! This is really intriguing. I was going to use 0.75 oz DCF for my tent project but I wasn’t sure if the extra spectra was truly needed. But extra mylar? That seems like a good idea for sure. I do love that spruce green color on the 0.75oz though!

AG, I have been prototyping the LiteSkin on some parts of our bike bags. Really neat stuff. I do think it would make a good lightweight pack fabric, although it’s possible that the lower tear strength would come into play when bushwhacking if you got a stick or rock stuck on it. They also make an LS42 LiteSkin at 6.9oz which would make a great pack bottom material with its higher tear strength.

(LiteSkin tear strength: for LS07, 5.1 lb on the warp, 5.3 on the weft – in comparison, VX21 is 16.9 on the warp and 13.5 on the weft).

The other difference with LiteSkin versus other DP fabrics is that it does not have a layer specifically for waterproofing in the middle of the fabric (like VX21 which has a 0.25 mil PET film inside). The spec sheet does give it a very high waterproof rating so I think the polyester resin coating provides good waterproofing, but that may wear off over time. No way to tell without testing it.

Has anyone handled this material? I’m curious to hear how it folds/stuffs/rolls with the thicker facing.

Good point. The floor of my old Duplex folded and rolled just fine.

It’s hard to keep track of all the variations…

I worked with the old Cuben only (0.5 osy, 0.8 osy, 1.0 osy, 1.43 osy and 2.92osy). I loved the 0.8 the most. It had a single ”E” layer of a different material. About as puncture resistant as the double layered ”K” according to Cubic tech long ago… The single layer was much more compact than the double one which for a 3 man tunnel would have made a big difference. This new .61 osy sounds very tempting… and for smaller projects and tarps the slight bulk of the thicker layers shouldn’t be an issue and it give me peace of mind with regards to durability.

my 2 cents

Cheers

Half the dyneema but double the mylar.  Looks like it could be a lighter choice for floors where 1 oz is often used for the extra mylar thickness but extra strength isn’t needed or a slightly heavier replacement for 0.51 oz with the same strength but extra mylar for better long term waterproofness.

The HMG Ultamid 2 and 4 , use 0.51 oz fir the white and 0.74 oz (for their optional green) correct?

so their white and green are  both .74 dyneema then?

how does the mylar content compare between the .61 and .74?

re mylar: this is also not entirely clear. and perhaps an industry person can explain better. but short answer is the “18” row fabrics in the chart above have a mylar that is roughly twice as thick as the fabrics in the “08” row.  

i say roughly twice because as i understand it, these are also two different *types* of mylar (not just two different thicknesses of the same type). thus if you look at the product codes you will see that the .8oz fabric uses an “E” type mylar, while the .61oz fabric has a “K” type mylar.

here’s how it was once described in another BPL thread: “The 0.18 has a doubled ‘K’ mylar layer. The ‘E’ is a different mylar layer than the ‘K’. The ‘E’ is lighter than the doubled ‘K’ layer while more resistant than a single ‘K’ layer.”