BrinM wrote: ↑
Wed Sep 16, 2020 8:27 pm
Dyneema woven with polyester would be a challenge for a lightweight technical fabric
Polyester and UHMWPE (ultra high molecular weight polyethylene...what a mouthfu = Dyneema) are very different fibres with different properties....hard to make a stable performance fabric I would guess its unlikely that such a mixture would make it to market...
but ya never know......
I'd like to add what you spared us:
- UHMWPE yarns are very slippery, so even if very dense woven the weave won't be as stable as 100% HT Polyester
- poor adhesion properties make the coating and impregnation not very long lasting (Aluula is a different thing)
- the very different modulus and stretch of the 2 yarns would result in UHMWPE yarns (supposedly ripstop only) taking all the load, long before the polyester yarns do. Which will most likely result in lower tensile strength.
Nevertheless, such canopy ripstop fabric was developped few years ago, but never made it to market. Tear strength was ridiculously high, to the point where if a damage happens it's a very ugly one and much more difficult to repair. And bias elongation was not better than a conventional polyester ripstop.
Faxie wrote: ↑
Tue Sep 15, 2020 4:08 pm
I still cannot find anything about what material it actually is. Looking at the specs and price, my guess is still that it's lighter Dacron (so polyester) with a double ripstop dyneema thread and maybe a new coating. Makes me wonder about the puncture and abrasion resistance, and also the strength of the seams...
It is a lighter Dacron, yet different.
Same type of polyester yarn, but different 'thickness'
Same weave pattern, but not so tight (therefore the 5x tear strength)
Different 'coating' type and process - actually similar to canopy coating - also contributing to the 5x tear strength.
The 5x tear strength I consider almost irrelevant and would put it at the bottom of the list with advantages over conventional dacron (for kite LE/struts). Too much marketing BS again.