Polyester/Lycra vs. Nylon/Lycra

[JamesSwim]

Agonswim's web site says that many so-called Nylon/Lycra swimsuits in the past were actually made of Polyester/Lycra. Polyester does not absorb water, holds colors better and is softer. Nylon is sturdier but the Lycra falls apart before anyhow, so sturdiness may be moot.

Anyone know why Poly/Lycra has fallen out of favor?

[SwimTeamSpeedo]

The Nylon suits of the past were really all Nylon. Lycra was not around until the the 70's, thanks to our friends at Dupont, who created it. Before the Nylon suits, suits were made of wool... I think Speedo started putting lycra in their suits sometime in the middle to late 70's, could have even been early 1980's. Poly lycra has gone out of favor becasue poly has about the same wear strength as lycra, and is more stretchy, so the suits did not hold up well.

[JamesSwim]

Thanks. That makes sense. I suppose the manufacturers will basically make things that the customers preferred.

But on the other hand, I thought that manufacturers will want suits to not last as long, so that we buy more!

But the Agonswim poly/lycra suit that wore was good -- it fit well.
---


For background:

I did a web search and found this science fair comparison (thanks to fabrics from Tyr), but can't tell if this compared suits that had Lycra, or was 100% Nylon or Poly.

http://www.usc.edu/CSSF/History/2006/Projects/J1107.pdf
----

By the way, here's what their web site says. I was slightly wrong -- they said that 100% poly suits were often called "Nylon" in the past. But maybe the info on hydrophobic polyester applies to Poly/Lycra suits too.

http://www.agonswim.com/fabricsnew.cfm

Knit Polyester:
100% knit polyester is soft to the touch and quick drying. It is similar to the “nylon” swimsuits manufactured back in the 60s and 70s. It is very durable and does not degrade in chlorine.

and

Polyester versus Nylon:
Polyester is hydrophobic, meaning it does not absorb water. This means that when it is dyed, only the color of the dye dissolves into the fabric (not any water-base), making the dye permanent. Nylon® possesses hydrophilic qualities (that is, it absorbs water). Its inability to repel water causes the fabric to swell and ultimately weakens the molecular structure. The dyestuffs used on nylon® tend to oxidize, a reaction which is catalyzed by light. The microscopic effects range from color fading to complete degradation of the polymer matrix. This is why the colors fade in nylon-lycra® swimsuits over time, but do not fade in polyester-lycra® swimsuits (Man-Made Fiber Yearbook, August 2000).
from

http://www.agonswim.com/fabrics/fabricInformationGuide.cfm

[Lap Counter]

One of the best features of the old all-nylon Speedos was that they dried almost instantly.

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[FrankJScott]

why not just google it (https://www.google.com)

[I'll be brief]

Polyester causes me to break out in hives! I can still find nylon suits but they are increasingly rare.
I'll be brief

[Torchwatch]

Is it the polyester fabric that causes the hives issue or the elastane in the Lycra (making it stretchy and skintight) that causes the issue?
Many tents and lightweight waterproofs are now made of polyester.
Aussibum were making some swim briefs in nylon, I bought some, it's kind of retro going back to pre Lycra days.
If you have an issue with elastic in waist bands and leg holes on both swim and underwear briefs consider wearing Japanese fundoshi designs. The Japanese used to swim in fundoshi until VJ day 80 years ago on Friday. Japanese swim teachers used to grab kids by the rear strap of their fundoshi should they start drowning.
The fundoshi is worn like a thong, the original B&W version of the 7 Samuri shows men in fundoshi.

[I'll be brief]

Torchwatch,
Thank you for your reply. It is polyester and not the elastane that causes the rash. I have several nylon/spandex suits that do not cause problems. There are so many great looking suits and underwear on the market that I have to pass on.

[Lap Counter]

Polyester causes me to break out in hives! I can still find nylon suits but they are increasingly rare.
I'll be brief

According to a friend who’s a nurse, the correct term is “contact dermatitis”. I get it from my bike shorts and it isn’t pleasant.

[Torchwatch]

There's a naturist camp near Cap Ferret called La Jenny, the happy campers travel some distance from their site to the beach access along the long distance coastal cycle path. I was quietly hiking the coastal cycle path in speedos with a heavy camping pack and noticed I was being passed in both directions by stark naked cyclists. Their bikes weren't particularly good, the French seem to have a class of almost expendable beach bikes that grind sand into all moving parts, suggesting these cyclists were more interested in naturism than cycling.
If you are allergic to your cycling shorts maybe a week or 2 at La Jenny would do you good!

I once had some cotton Lycra, it's thicker than cycle/swim Lycra but it might get around your issues. I do have a sewing pattern for 4 panel cycle shorts somewhere. It might dodge your issues.

[Torchwatch]

I've looked up the Organic Cotton supplier I used to use, they have some interesting products including bamboo silk and cotton Lycra. The Lycra content is 5% so they won't be super stretchy but will tend to cling especially when wet or sweaty.
I've experimented with organic cotton fundoshi wondering if there were a market among those allergic to synthetics and elastics.
https://organiccotton.biz/store/

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