The Offshore Voyaging Reference Site

Nylon Line In Europe 2

The plot thickens. I came across this product page at RobLine an Austrian rope maker and they have a bunch of lines for mooring, docking, that will be good for anchor snubbers.

Interesting quote from that page:

Robline caters to the trend toward using different fibers for mooring and anchor lines, depending on the specific use, and introduces cordage made of polyamide (known as nylon) in order to utilize the high elasticity of this fiber to cope with critical shock loads.

These lines are available from upffront.com, in Germany, who ship everywhere, among others.

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Michael Jack

Thanks, John. Being said member, I have continued my research as well and as far as I can tell, the letters H.T. are often not used when describing Polyester. Mostly they seem to drop it but I am assured by my supplier that good quality marine rope makers always use H.T. Polyester. For example, the Marlow website talks about Polyester on it’s materials description page but doesn’t mention H.T. But I am told (by the shop) that is is indeed H.T. I have sent an email to Marlow to confirm (btw, they also talk about Nylon on the same page): https://www.marlowropes.com/innovation/material-types/

Michael Jack

And here is what Marlow says. I find the point about Nylon being Hygroscopic interesting as it seems to speak to H.T. Polyester being more suited to boat use:

The majority of the Polyester we use is high tenacity type. We do also use some recycled HT and some other specialised grades. 
 
Nylon and polyester are different materials with a whole list of differences in their properties, the most significant ones probably being:

  • Nylon has much higher elongation
  • Nylon type 6 has lower melt point
  • Nylon is Hygroscopic and so affected by water
  • Different densities: 1.38 for polyester, 1.14 for Nylon
  • Chemical formulation is different so they are resistant/attacked by different chemicals.
Michael Jack

I quite like the overthinking on certain subjects since its actually not in my nature to do so (I tend to treat things at quite a high level the weakness of which is just doing the first thing that comes along that seems to make sense). But agreed, this subject is now done to death 🙂 Thanks again for your help.

Anton P.

Thanks for the reference about snubbers. I am replacing a Manson anchor these days with a Sarca Excel (the only one that should fit the arm design) and looking at ARMARE’s options here in Italy:
Square Line Polyester (8 strand braid in Polyester)
Round Line Polyester (12 strand braid in Polyester)
https://store.armareropes.com/eng/square-line-pp.html?linea=1279

What do you think John?
I am looking for something in the +10T Breaking Load for a 73ft carbon racing yacht.

Anton P.

Sorry, let me get this straight…

Nylon = H.T. Polyester (https://www.morganscloud.com/2020/01/11/anchoring-snubbers/#comment-303790)Dacron = ? Polyester (not High Tenacity?)? = H.T. PolypropyleneArmare Square Line PP
8 strand braid in H.T. Polypropylene with UV treatment.Multi-use floating line, for long moorings and towing.

Armare Square Line
8 strand braid in Polyester. Commonly used for the mooring of all types of boats up to Super Yachts, anchoring as well as temporary and long moorings of medium and small boats.

https://www.armareropes.com/en/mooring-line/

Anton P.

Sure I get that John.

Looks like what you call in North America as H.T. NYLON is actually H.T. POLYAMIDE
You can see this in the title of this PDF from plam.it

CORDA GHERLINO POLIAMMIDE H.T.

DOUBLE TWISTED H.T. NYLON ROPE

https://www.plam.it/wp-content/uploads/150.pdf

H.T. POLYAMIDE ≠ H.T. POLYESTER ≠ H.T. POLYPROPYLENE

I will get my new snubber from Plam, cheers

Anton P.

In Europe, get:

Gottifredi Maffioli MAXIDOCK
which has a core in Polyamide and has higher stretch than Polyester.

Liros ANCHORPLAIT or OCTOPLAIT is another excellent product for a snubber or anchor warps, more expensive though…

So the European translation for Nylon = POLYAMIDE