Sammelfaden: Neues aus der Welt der Zelte

Zitat von Carsten K.

A detail of the upcoming ArcDome 2 Polyester

Drops early April

"We are very excited about the unique 30D super high tenacity polyester we are introducing in this tent. This fabric is the product of years of work to find a suitable rival for 30D nylon 6,6. Most polyester fabrics, including those labeled as “high tenacity”, achieve strength that is relatively far from the theoretical max. This is why despite the theoretical ability of polyester to come close to nylon 6,6 in strength, the reality is that the fabrics used in the outdoor industry are distinctly weaker or at least until now.

A interesting aspect of this fabric is that since it uses the most cutting edge super high tenacity yarns available it cannot be reliably dyed. This means the fabric is only available in its natural white color. These fibers are also currently only available in 30D and heavier but our suppliers assure us that 20D yarns are in development.

Tarptent hat in deren Buyers Guide übrigens noch ergänzende Informationen zu den verschiedenen Zeltmaterialien verfasst. Ich habe einige interessante Stellen im Text markiert:

Zitat

Silicone + Polyurethane Coated Fabrics

20D Nylon Double Ripstop:

Previously used in our Ultra and Li Series floors
20D Nylon 6 with Double Ripstop Grid
4000mm+ Hydrostatic Head
One Side Silicone, One Side Polyether Urethane (PE/PeU)
~1.2oz/yd

15D Nylon Quadruple Ripstop:

Used in our latest Li Series floors
15D Nylon 6.6 with Quadruple Ripstop Grid
4000mm+ Hydrostatic Head
One Side Silicone, One Side Polyether Urethane (PE/PeU)
~1.2oz/yd

30D Super High Tenacity Polyester Double Ripstop:

Used in our newest 4-season tents
30D Super High Tenacity Polyester with Double Ripstop Grid
4000mm+ Hydrostatic Head
One Side Silicone, One Side Polycarbonate Urethane (PcU)
~1.5oz/yd

Polyurethane based coatings go by many names and have various types. These are the only coatings that can be seam taped so if the tent is seam taped and not made from a Dyneema or UltraTNT it uses a polyurethane coated fabric. Details on the different types of PU coatings can be found below but they all are lower performing than 100% silicone coatings in nearly every measurable aspect. We use these coatings due to the convenience to the customer of not having to seam seal. Polyurethane coated fabrics typically are coated on one side with PU and one side with silicone as silicone is higher performing and only one side needs to be taped. However this does not mitigate either the breakdown of the PU coating or the fact that PU coatings decrease tear strength.

PU vs PE/PeU vs PC/PcU

There are three main types of polyurethane based coatings. Polyester urethane, polyether urethane (PE/PeU), and polycarbonate urethane (PC/PcU). Polyester urethane is the cheapest and lowest performing of these types as it is prone to decomposition due to hydrolysis which occurs due to prolonged moisture contact. Polyether urethane (PE/PeU) is more expensive and less prone to hydrolysis, and polycarbonate urethane (PC/PcU) is even more expensive and even less prone to hydrolysis. These days it is rare to find coatings that are not either polyether urethane (PE/PeU) or polycarbonate urethane (PC/PcU) on most well regarded tents, so many large companies don’t bother listing the specific type and just call the coating ‘PU’. Some companies like to claim that ‘PU’ implies low quality polyester urethane while touting their PE/PC coatings as vastly superior or claim that PE/PC is not polyurethane when it is. We always list the coating type as either PeU PcU as we feel it is important for customers to know that these are all still polyurethane while also noting the specific type used.

Coatings and Seam Sealing

Which do you use fabrics that need seam sealing?
We choose fabrics with 100% silicone coatings (the highest performance and longest lasting coating available), and currently no usable seam tape exists for these coatings. This means that to seam seal the tent, liquid silicone must be ‘painted’ on by hand.

Li and Ultra series tents do not need seam sealing as they are fully seam taped using PSA backed DCF tape from the factory.

To see how to seam seal click here.

Why use 100% silicone coated fabrics?

Unlike any coating containing polyurethane (PU, PE, PC, PeU, PcU), 100% silicone coatings will never rot, yellow, or chemically decompose under normal conditions including hot humid environments. This means that the fabric’s coating will not limit the lifespan of the tent and does not require special care or storage specifically to preserve the coating. 100% Silicone coatings also increase the strength of the fabrics they are applied to, providing yet another benefit over polyurethane coatings which actually decrease a fabric’s tear strength.

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Insbesondere der letzte Abschnitt dürfte auch für wilbo interessant sein.