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Generations of Nylon



"Generations of Nylon," in the Carpet Q&A forum, begins: "Another thread got me thinking about the changes in nylon over the years. I'm not positive if we are on ..."

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Old October 29, 2009, 08:05 AM   #1
Peter Kodner
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Generations of Nylon


Another thread got me thinking about the changes in nylon over the years. I'm not positive if we are on fifth or sixth generation (probably depends on which fiber producer you speak to ).

What were the changes made?

I start wit first generation: DuPont 501 nylon was the first nylon fiber introduced for carpet applications in the mid fifties. It had a round cross section and was clear.

What was 2nd generation?

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Old October 29, 2009, 01:05 PM   #2
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Re: Generations of Nylon


Don't know , But i do know i was ripping that 26 oz 501 out of peoples houses 20 to 30 years later .
Think i was paying around $2.00 a yard for it .

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Old October 29, 2009, 09:00 PM   #3
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Re: Generations of Nylon


I'll give you some more time to answer. 501: looked all bright and shiny, showed every bit of soil but dang, it never wore out!

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Old October 29, 2009, 09:18 PM   #4
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Re: Generations of Nylon


Aren't we in the 6.6 stage now?
Anyway, I have a little doddad that has yarn shapes on them showing through magnification what it did to dirt.

"Round" Creates a lens effect, magnifiying the soil

"Trilobal" Reduces magnifcation effect and scatters light ato make soil less visible. Trilobal shapes can hold soil

"Delta" Reduces soil-trapping crevices while scattering light to make soil less visible.

"Four Hole Hollow filament" This smooth square shape resists soil while the four voids scatter light most effectively to make soil less visible.

by Dupont Antron

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Old October 29, 2009, 09:22 PM   #5
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Re: Generations of Nylon


Peter Kodner said View Post
What was 2nd generation?
................ anso.........

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Old October 30, 2009, 06:12 AM   #6
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Re: Generations of Nylon


Wasn't the first generation just plain nylon and the second 501 ? I do't remember seeing the 501 label until the late 60's to early 70's.

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Old October 30, 2009, 08:40 AM   #7
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Re: Generations of Nylon


The second generation was delustered. Basically still a round cross section that had "nicks" or cuts on the fiber to break up the light passing through.

Third generation was the trilobal, delta and hollow filament (DuPont had a four hole and BASF had a five hole. Monsanto and Allied never produced anything other than trilobal/delta cross sections.)

Nlyon is made in two basic polymer forms: type 6 and type 6,6. This has been the case since they were both polymerized in the early 30s. Type has nothing to do with generations. In my belief, the old 6 versus 6,6 "debate" has never established any concrete performance difference for carpet fiber, and in fact, the one scientific study I have read concluded that maintenance is far more important than fiber type.

501 was developed as a clothing fiber and found to be great for carpet fiber. It was always 501 but the labeling of it was before my time...

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Old October 30, 2009, 08:42 AM   #8
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Re: Generations of Nylon


cproader said View Post
................ anso.........
............I guess not..............

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Old October 30, 2009, 08:59 AM   #9
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Re: Generations of Nylon


cproader said View Post
............I guess not..............
Sorry CP! Anso (Allied now Shaw) and Anton (DuPont now Invista) are fiber brand names and are not necessarily designations of generations. That said, some of the permutations of the brand name did and do denote advanced generation, i.e. Anton III and Anso IV.

What was added for the 4th generation?

It also might be helpful to understand most of these developments were first applied to commercial. Some of the "Generation" were never applied full scale to residential. (and vice-versa!).. As an example, hollow filament fibers have never been a factor for residential. Trilobal/delta cross sections provide the needed soiling hiding protection for that end use. The ultra-premium fibers do not garner a cost/benefit increase.

BTW, the comments about commercial/residential provides a clue for what became 4th generation...


Last edited by Peter Kodner; October 30, 2009 at 09:08 AM.
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Old October 30, 2009, 10:04 AM   #10
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Re: Generations of Nylon


I believe you mean Antron.

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Old October 30, 2009, 10:15 AM   #11
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Re: Generations of Nylon


Thanks T, but I meant Anton, Antron's gay sibling...

Alas, my fingers are quicker than my eyes

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Old October 30, 2009, 02:07 PM   #12
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Re: Generations of Nylon


Peter Kodner said View Post
Sorry CP! Anso (Allied now Shaw) and Anton (DuPont now Invista) are fiber brand names and are not necessarily designations of generations. That said, some of the permutations of the brand name did and do denote advanced generation, i.e. Anton III and Anso IV.

What was added for the 4th generation?

It also might be helpful to understand most of these developments were first applied to commercial. Some of the "Generation" were never applied full scale to residential. (and vice-versa!).. As an example, hollow filament fibers have never been a factor for residential. Trilobal/delta cross sections provide the needed soiling hiding protection for that end use. The ultra-premium fibers do not garner a cost/benefit increase.

BTW, the comments about commercial/residential provides a clue for what became 4th generation...
Peter are you talking about Fluorocarbon treatments to improve cleanablity and repel stains, anti-microbial agents to prevent mold and bacterial growth?

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Old October 30, 2009, 02:11 PM   #13
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Re: Generations of Nylon


Short answer: no.

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Old October 30, 2009, 04:25 PM   #14
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Re: Generations of Nylon


Nylon was first planed to replace silk stockings, one of the first's places it was tested was on East ST. right here in Frederick MD. It was going to be named after the inventor, then the started to look for other names, then they thought about calling it NO Run because haw fast silk stoking ran and nylon was going to be better, then they deside that if it did run the cuold be sued so they started playing with the name and ended up with Nylon. The inventor felt he had failed and hung himself. It was introduced at the Worlds Fair.

Talk to Dupont and they will say it is the 6 th generation and the others say the 5 th
6.6 Nylon is harder to dye for it takes the dye harder and because of this it doe's not fade as fast and is better in areas that get lots of sun light.
As far as wear they are both the same

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Old October 30, 2009, 09:35 PM   #15
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Re: Generations of Nylon


6,6 has a melting point about 50 degrees F higher than 6 and requires a hotter dye bath and longer exposure. This can be a benefit or a detriment depending on the yarn system and carpet being made.

Testing indicates for interior use, there is not a major difference between 6 and 6,6 for Uv exposure. This said, I have seen some pretty ugly color changes in both types under strong direct sunlight. Uv stabilizers help for color, but nylon cannot be made where it will not degrade under strong Uv light like a polypropylene will. In other words, there will never be an outdoor nylon yarn.

Roland is referring to Wallace Carothers, a true genius. Here is a link to a Wikipedia article that is pretty good and accurate to my knowledge. Wallace Carothers - Wikipedia, the free encyclopedia

No more answers on what became fourth generation? I'll give it until tomorrow.

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