If the epoxy is not absorbed into "non treated" thread, why does the non treated thread change colors when epoxy is applied?

It is absorbed into the thread, but not into the nylon fibers that make up the thread. Nylon is not like organic fibers that may absorb fluids.

Isn’t it the same for fiberglass, and carbon fibers?
Norm

yes

Nylon mono filament line absorbs water.

I just read several; articles on polymers, including nylon, and their interactions with different kinds of epoxy. One of them even gave explanations of how carbon nanotubes could be added, nd how it increased tensile, shear strength, modulus, and flexibility when applied to the resin/carbon fiber substrate wound onto a mandrel, especially when micr-combed. In all cases, the articles srated tgat certain epoxie do penetrate into the nylon, forming a chemical lattice. So yes, epoxies can absorb into nylon, silks, and other polymers.

Tight Lies and frisky fish

RJF

How about showing us the links to the articles on polymers?

Robert Flowers Wrote:
-------------------------------------------------------

> cases, the articles srated tgat certain epoxie do
> penetrate into the nylon, forming a chemical
> lattice. So yes, epoxies can absorb into nylon,
> silks, and other polymers.

I'd like to see proof of this as well. It seems to me this thread has an issue with what the term absorption means or how far it goes. Just because a ball of fuzz can absorb some liquid by capillary action does not mean the liquid is also being absorbed into the substrate materials or chemically altering them for the attachment. Surface attachment is far different than molecular reconstruction.

If there is a chemical connection or lattice as claimed, this would mean the epoxy is physically altering the substrate by chemical reaction for better adhesion is how this is coming across, yet from my own experiences over decades I have never personally seen an epoxy join with the substrate as one from two. I have always seen 2 simply side by side and separable to some degree.

Adhesion is always an issue, but generally, the softer and more flexible an epoxy is after curing will have greater surface adhesion than epoxies that cure super hard. Those tend to flake off down the road.- without showing any chemical lattices when the flaking off begins.

So I'd really like to see proof of this claim that epoxy breaks down substrate materials like nylon and polymers- but NOT silks- and joins with them as one.

We gotta keep it straight... are we dealing with chemical reconstruction and reactions between epoxy and substrate materials becoming as one, or simple surface adhesion with capillary action making it appear something more is going on?

Bottom line: Does it hold guides firmly in place?

[www.deepdyve.com]

[www.sciencedirect.com]

[www.researchgate.net]
'
Spoiler; can be dry reading.

Tight Lies and frisky fish

RJF

Mono filament is nor nylon

Depending on the type of nylon, it can be extruded into many different forms, as in monofilament nylon fishing line, fly tying threads, guide wrapping threads, as a base for rod blank construction, etc. Phil, are you a mechanical engineer? nylon/carbon resins are even used to make helicopter rotor blades, aircraft wings, car body panels, etc. How can you say that nylon can't be monofilament? Yes there are other monofilaments out there, Kevlar, GSP, fluorocarbon, etc. nylon is certainly a monofilament option.

Tight Lies and frisky fish

RJF

Assuming nor means not..... you might want to look up what we commonly refer to as mono filament line, is made of.

It's extruded nylon.

Robert, thank you for the references. However, I'm not sure that what is covered in them is relevent to the wrap discussion since the "epoxy" that is used for wrap finish is a casting resin and not really "epoxy."

But I'm not qualified to judge. I don't understand the technology that well. I asked for the references since it is easy for different people to interpret scientific papers and their conclusions differently. So I wanted to see them.

The third paper on nanotube/nylon composites is interesting , but simply covers a special type of composite, not whether nylon is affected/influenced/absorptive of epoxy. thanks again.