Understanding Bonded Nylon and Bonded Polyester Thread

[nylonRigging]

On 12/26/2020 at 8:29 PM, JJN said:

Nylon will stretch where polyester will not.

Poly. thread does stretch, it just that Nylon thread stretches more than Poly. 

like ( DoninReno ) saying, the general 'rule of thumb' is that Poly.thread tends to be more UV resistant and hold dye color better when getting a beating by UV . Nylon is better for holding up for abrasion and a little higher tensile strength over Poly.

Nylon and Poly. thread both start melt right around the same Temp. , When burning each they also smell totally different . When melting thread tails,  the Nylon thread melt a lot nicer than Poly thread . I like the way Nylon thread tails makes a nice little puddle. Poly. thread tends to just Flame-on pretty intense and quick .
You also notice when hot knifing/cutting Nylon thread weave of webbing's and nylon fabrics, that it's a lot cleaner/nicer melt with Nylon.
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[Trouthunter]

Thank you for all the guidance and help!!!

[Synicsel]

The stiffness and softness you're experiencing can be due to their individual properties. Bonded Nylon tends to be softer and more pliable, which can make it prone to fraying. Bonded Polyester, on the other hand, is usually stiffer and more durable.

[nylonRigging]

13 hours ago, Synicsel said:

The stiffness and softness you're experiencing can be due to their individual properties. Bonded Nylon tends to be softer and more pliable, which can make it prone to fraying. Bonded Polyester, on the other hand, is usually stiffer and more durable.

Nylon is structurally stronger and more abrasive resistant than Poly . Poly is more UV resistant than Nylon .  Both Nylon and Poly have there versions of ' satin soft ' threads.

.

[Synicsel]

On 1/17/2024 at 12:24 PM, Synicsel said:

The stiffness and softness you're experiencing can be due to their individual properties. Bonded Nylon tends to be softer and more pliable, which can make it prone to fraying. Bonded Polyester, on the other hand, is usually stiffer and more durable.

It's not unusual to prefer one over the other for specific projects. If you're looking for a stiffer #138 thread, you might want to check if there's a Bonded Polyester variant that suits your needs.

If you're ever interested in exploring something else, I recently came across some interesting info about Polyethylene Terephthalate (PET). It's all about plastics and recycling, which is quite a hot topic nowadays.

Edited January 18, 2024 by Synicsel