Talk:Kevlar/Archive 1

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Archive 1

ADD

Kevlar is poly(p-phenylene terephthalamide) —Preceding unsigned comment added by 98.245.211.25 (talk) 01:10, 27 October 2009 (UTC)

Contradict

This page contradicts itself: "is unaffected by immersion in water" ... "is degraded when wet" (both in second paragraph).

Sombody needs to check this page, it's full of garbage like "thick as a monkey"?? 82.28.25.177 03:17, 15 October 2005 (UTC)

Sorry about my last comment, it apears to have been fixed, but somehow when i first accessed the page wikipedia showed me an older revision? 82.28.25.177 03:25, 15 October 2005 (UTC)

check these site out about kevlar

History of Kevlar

In the 1970s, one of its most significant achievements in the development of body armor was the invention of DuPont's Kevlar ballistic fabric. Ironically, the fabric was originally intended to replace steel belting in vehicle tires. The development of Kevlar body armor by NIJ was a four-phase effort that took place over several years.

The first phase involved testing Kevlar fabric to determine whether it could stop a lead bullet. The second phase involved determining the number of layers of material necessary to prevent penetration by bullets of varying speeds and calibers and developing a prototype vest that would protect officers against the most common threats: the 38 Special and the 22 Long Rifle bullets.

By 1973, researchers at the Army's Edgewood Arsenal responsible for the bullet proof vest design had developed a garment made of seven layers of Kevlar fabric for use in field trials. It was determined that the penetration resistance of Kevlar was degraded when wet.

The bullet resistant properties of the fabric also diminished upon exposure to ultraviolet light, including sunlight. Dry-cleaning agents and bleach also had a negative effect on the antiballistic properties of the fabric, as did repeated washing. To protect against these problems, the vest was designed with waterproofing, as well as with fabric coverings to prevent exposure to sunlight and other degrading agent Kevlar was first used commercially in the early 1970s. It can be spun into ropes or sheets of fabric that can either be used as-is, or used in the construction of composite components. Kevlar is now used in a wide range of applications, from bicycles to body armor —Preceding unsigned comment added by Evilelf7 (talk • contribs) 19:25, 4 April 2010 (UTC)


"intra-molecular hydrogen bonds"

The article reads:

Kevlar derives its strength from intra-molecular hydrogen bonds and aromatic-aromatic stacking interactions between the strands. These interactions are much stronger than the van der Waals interaction found in other synthetic polymers and fibers like dyneema.

But the hydrogen bonds are an instance of Van der Waals bonding.


Actually, Hydrogen bonds are a special kind of Van der Waals bond. The term is used to differentiate from the weaker kinds of Van der Waals interraction such as dipole-induced dipole bonds. Nonetheless the phrasing is misleading -- and other polymers (Nylon for instance) also contain Hydrogen Bonds. --Xanthine 16:03, 25 January 2006 (UTC)


The statement is misleading and contradicted later in the article. "Water that enters the interior of the fiber can take the place of bonding between molecules and reduce the material's strength.." So the first statement is conditional on the material being dry.

Secondly, the second sentence "These interactions are much stronger than the van der Waals interaction found in other synthetic polymers and fibers like dyneema." is untrue as the interactions in the UHWMPE molecules outnumber the interactions in the poly-paraphenylene terephthalamide molecule and therefore provide a far stronger bond molecule for molecule. The comparison goes astray when the author tries to compare the qualities of a single atomic level bond with an entire molecule. The two sentences should go.--203.206.186.81 06:00, 31 January 2006 (UTC)

Hydrogen Bonding

Hydrogen bonding is a term used which desibes intermolecular forces greater in magnitude than normal Van der Waals forces. Although the mechanism is similar, it would be misleading to change the words to something different to what is currently. The words at the moment give a good explaination and are not misleading.--LukeSurl 13:26, 2 May 2005 (UTC)

Actually, it seems to imply that other polymers don't contain hydrogen bonds -- which isn't true. --Xanthine 16:08, 25 January 2006 (UTC)

Sure you also get h bonding in other plastics but not too this extent.

...Your point being? It could still do with a little clarification.

non-bonded interaction in PPTA

Two small points about the interactions in PPTA fibers:

The article mentions intra-molecular H-bonds; however, the h-bonds are inter-molecular.

The article also mentions aromatic stacking as an important contribution to the strength of the structure. The aromatic rings in the individual chains are however not all in one plane, but in two planes, in an alternating fashion. Related to that, rings in neighbouring chains are not parallel, but at an angle of some 50 degrees. The contribution of aromatic ring stacking is therefore probably rather small compared to the contribution from the H-bonds.

The structure has been reported by Liu et al., Polymer vol. 38, 8, 1413-1430 (1996).

Verp 11:44, 16 September 2005 (UTC)

Introduction

The introduction section has some redundancies such as 5 times as strong, dupont brand, etc. There is also no logical sequence to it, jumping back and forth between properties, history and use. I'm going to try and edit the introduction. This isn't one of the flaming hot wikipedia articles were people revert to their point of view and I don't intend to lose information, so I guess there's no real issue. If in doubt, feel free to revert. 165.21.154.14 23:57, 5 November 2005 (UTC) Roy

I edited the introduction text into three parts: history and properties, uses and the technical description. I was careful not to lose any information and left most of the text intact, merely shifting it around and grouping it logically. I can see how someone may argue the order of the above though. I'm not completely happy with my change but feel it's better than the previous text. 165.21.154.8 00:18, 6 November 2005 (UTC) Roy

Kevlar was invented by Stephanie Kwolek, a DuPont chemist. I believe recognition of her name would be appropriate. She has been responsible for saving thousands of lives. —Preceding unsigned comment added by 153.24.73.61 (talk) 20:03, 2 March 2010 (UTC)

Solvent

Unless I'm mistaken, isn't the industrial solvent for Kevlar actually Hydrochloric Acid and not Sulphuric as that last paragraph states? --Xanthine 15:59, 25 January 2006 (UTC)


clorine breaks it down and all you need is a strong acid to disrupt the intermolecular electrostatic effects (or pi stacking)

this article should have a picture

picture and synthesis details

http://www.chemie.fu-berlin.de/chemistry/kunststoffe/kevent.htm —The preceding unsigned comment was added by Stone (talk • contribs) 13:56, 11 December 2006 (UTC).

HCl is produced in the production method stated by it would be in the form of hydrogen chloride not hydrochloric acid! What do i want to... (talk) 09:36, 3 December 2009 (UTC) What do i want to..(talk) 09:35, 3 December 2009 (UTC)

Strength considerations

http://www2.dupont.com/Personal_Protection/en_US/news_events/article20050902.html

This site says that Kevlar is five times stronger than steel, but there are two things I wish to bring up.

1. Does it mean that it is six times or five times AS strong as steel? 2. This site is made by the creator of Kevlar. I think we need an independent confirmation that it IS, indeed, five times stronger THAN steel. After all, the military would have switched all its tanks to a Kevlar-steel armor shell despite Kevlar's low melting point if this is true. —The preceding unsigned comment was added by -Slash- (talk • contribs) 03:44, 18 December 2006 (UTC).

The five times stronger thing

Someone screwed up the reference. -Slash-μιλώ 02:55, 31 December 2006 (UTC)

...also this sentence... Under water, Kevlar is less resistant to ballistic projectiles, although it is water resistant. [2] ...was obviously beaten with the ugly stick, and the reference cited does not contain any mention of this. Please either remove or edit so that it makes sense and cites correct articles. —Preceding unsigned comment added by Spikesagal (talk • contribs) 21:32, 3 October 2007 (UTC)

Bicycles

Other than tires, where else is Kevlar used in bicycle manufacturing? Is it used in making frames? —The preceding unsigned comment was added by 209.218.206.2 (talk) 20:43, 15 January 2007 (UTC).

Seat covers or the corners of seats (or saddles as cyclist say), almost anywhere carbon fiber is used, but generally not for large items like frames (usually handle bars, bar ends, or seat posts), and braided outer housing on hydraulic disk brake lines.

Refrences?

There is wierd thing saying that the articles do not work. Some kind of error. I thought it might be because what someone had put there, so I got rid of them and added new sites that I thought were helpfull. However, it gave me the same error message, so I do not know what is with this. Could someone who knows more about this kind of thing fix it. That would be appreciated, Thank you. --Robin63 19:44, 2 February 2007 (UTC)

Fixed, and sorry for the revert-message. --Dirk Beetstra T C 19:48, 2 February 2007 (UTC)
It was even stupid little me who made the typo in the first place. Again sorry! --Dirk Beetstra T C 19:49, 2 February 2007 (UTC)

See also

This is not very important, but I decided to alphabetize the See Also links, as I believe this to be more pleasing to the eye and while there are not very many links there, if there are more in the future, it wwill help peolpe find the links faster. So if you are adding a link to the see also section, please put it in the right spot, according to alphabetical order. Thank you --Robin63 18:58, 9 February 2007 (UTC)

Magical properties

Hi:

The X times stronger than steel magical super wonderful talk needs to lightened. What doesn't Kevlar do? What are the trade offs? Ie, aluminum is strong for its weight, but there are many applications where steel is preferred for strength.

AG

1. The 5 times stronger than is just a throw away comment, however one that is common. For what it's worth, nylon is 3 times stronger! Since the exact strength test and also the grade of steel are not specified, it's obviously not a crisp technical description. It's ok toleave it in the article, but note that it's a popular description. Not recite it ourselves as some sort of definition.

2. Some of the places where steel eclipses Kevlar include: -compressive strength -cost -machinability (forming, cutting, casting, etc.) -high temp thermal performance

TCO (talk) 21:42, 3 January 2009 (UTC)

History?

The whole "History" section is very poor - in particular it's about the history of Kevlar bullet-proof vests, not Kevlar itself. It also reads very much like a PR piece "borrowed" from somewhere. Surely these articles are a better start:

Anyone game to do a re-write?Snori 20:56, 28 July 2007 (UTC)

  • Does anyone have that clip from 70's of that guy making a public test of his vest by just pointing the gun at himself and firing? Its a really good clip, really impressive. —Preceding unsigned comment added by 69.152.226.191 (talk) 11:41, 20 September 2007 (UTC)

Adding information

  • Kevlar fiber is synthesized by a unique method, called liquid crystal spinning (so-called dry jet-wet spinning), which is nearly a combination of dry spinning and wet spinning. First, they prepare Kevlar in liquid crystal solution by solving it in strong concentrated sulfuric acid. Then, the solution goes through a spinneret (look like a shower) to get the form of fiber. After that, the fiber goes through a small gap of air, this step makes rod-like liquid crystals orient in the fiber-axis. Next step, fibers go through cool water (coagulated bath) to be hardened, then spinned into simple yarns. There's no draw step here!

Jakminh (talk) 16:32, 19 March 2009 (UTC)

Kevlar

A Long Beach Native Hip hop rapper. —Preceding unsigned comment added by Kngofroq (talk • contribs) 04:09, 4 July 2009 (UTC)

Kevlar in paintball

A recent edit to remove a reference to kevlar vests being used in paintball led to do a bit of searching. Paintball accessories appear to include pants with kevlar kneepads, and kevlar face protection. But I didn't find any kevlar shirts/vests for paintball. As this was an unsourced reference, I'm thinking of removing it again, unless someone can find such a thing. Rwessel (talk) 04:15, 9 October 2011 (UTC)

DYE Paintball also used to have Kevlar reinforced shoes Aam25-NJITWILL (talk) 01:07, 14 December 2011 (UTC)

APA Sources

The APA formatted source for the DuPont page on Kevlar (the home page for reference 16) is as follows: Welcome to Kevlar. (2005, June 04). DuPont the Miracles of Science. Retrieved November 4, 2011, from http://www2.dupont.com/Kevlar/en_US/index.html


The APA formatted source for the official Motorola Droid RAZR page is as follows: Droid RAZR by Motorola. (2011, October 11). Motorola Mobility. Retrieved November 4, 2011, from http://www.motorola.com/Consumers/US-EN/Consumer-Product-and-Services/Mobile-Phones/DROID-RAZR-BY-MOTOROLA-US-EN


The APA formatted source for reference 21 is as follows: Hopkin, K. (2008, February 22). Fabric Produces Electricity as You Wear it. Retrieved November 12, 2011, from http://www.scientificamerican.com/podcast/episode.cfm?id=3E0E600F-F7B2-4F1F-DA377027B8FDC443&sc=rss


The APA formatted source for reference 9 is as follows: Woodford, C. (2009, December 7). Explain that stuff. Retrieved November 12, 2011, from http://www.explainthatstuff.com/kevlar.html

Aam25-NJITWILL (talk) 00:25, 2 December 2011 (UTC)


These are great. Appropriately formatted sources give a better level of credibility to the article. JohnHenley (talk) 14:37, 9 December 2011 (UTC) — Preceding unsigned comment added by 173.71.7.41 (talk)

Bows Not Strings

Shouldn't the section under Applications called "Strings" be called "Bows"? It states very clearly that the kevlar is used in bows for stringed instruments, not in the strings themselves. — Preceding unsigned comment added by 162.119.246.161 (talk) 15:02, 13 August 2012 (UTC)

Density?

The article says kevlar has a "relative density of 1.44," and the link to "relative density" doesn't say what the default reference density is.

This article does not clearly state the density of kevlar. — Preceding unsigned comment added by 128.143.100.108 (talk) 17:18, 2 October 2012 (UTC)

Unless otherwise specified, it's always relative to water. Rwessel (talk) 17:29, 2 October 2012 (UTC)

hi — Preceding unsigned comment added by 121.79.229.218 (talk) 00:48, 23 October 2012 (UTC)

Relative strength

This article says kevlar is 5 times stronger than steel. The article on silk also says silk is five times stronger than steel ... but that kevlar is twice as strong as silk.

https://en.wikipedia.org/wiki/Spider_silk

WithGLEE (talk) 12:19, 18 September 2013 (UTC)

Unprotect?

This article has been protected since Nov. 2012 for "persistent vandalism." The history shows the vandalism that occurred to be minor and infrequent, no more so than any other article. I may be wrong, but I don't think that Kevlar is the type of topic that would lend itself to mass vandalism. I am therefore suggesting unprotecting the article.

70.138.117.211 (talk) 18:06, 8 January 2014 (UTC)

 Done I have unprotected it. There was persistent vandalism at one time, but I think it is worth trying unprotection now. -- Ed (Edgar181) 19:19, 8 January 2014 (UTC)

.

How was the Kevlar name created?

How did that name come about? Who came up with it? — Preceding unsigned comment added by 23.119.205.88 (talk) 04:21, 22 June 2014 (UTC)

Semi-protected edit request on 13 July 2014

I found the live link for Nike's Kevlar Trainers, if you want to replace the dead link: http://nikeinc.com/news/nike-basketball-s-superhero-elite-series-2-0-rises-above-the-rest

Dave086 (talk) 10:18, 13 July 2014 (UTC)

 Done. Thanks for finding the link. —Mr. Granger (talk · contribs) 03:46, 14 July 2014 (UTC)

In bicycle tires

The article mentions that kevlar is used for puncture protection in some bicycle tires, and this is true. But it is more commonly used in a completely different capacity in bicycle tires: for the bead, a pair of wires or cords going around the edges of the tire that hold the tire onto the rim. There is a trade-off between steel and kevlar beads: steel is cheaper and easier to mount, but kevlar is lighter and allows the tire to be folded up, useful for spare tires. One source: [1] -- 97.120.76.86 (talk) 01:27, 26 October 2014 (UTC)

Semi-protected edit request on 15 December 2014

The ultraviolet component of sunlight degrades and decomposes Kevlar, a problem known as UV degradation, and so it is rarely used outdoors without protection against sunlight.[citation needed]

Please add the below citation to the above text:

[2]


McSkeptic (talk) 15:48, 15 December 2014 (UTC)

Surely we can find some better sources than these? Andy Dingley (talk) 16:04, 15 December 2014 (UTC)
Not done: - As Andy says we need better sources than that. –Davey2010 • (talk) 20:52, 15 December 2014 (UTC)
  1. ^ http://sheldonbrown.com/tires.html
  2. ^ http://repository.lib.ncsu.edu/ir/handle/1840.16/1092

Accidental Discovery?

The History section calls Kwolek's discovery of Kevlar's resilience, "accidental." However, it also describes Kwolek's process of recognizing properties she was looking for in a substance and then pursuing examination of that substance based on that observation, which led to the discovery the section discussed. Even if Kwolek was not expecting the result she got, calling the discovery, "accidental" is questionable, given that the discovery was the result of intentional examination of a substance that displayed properties Kwolek's team was looking for.

Gnosego (talk) 04:51, 3 January 2015 (UTC)

Assessment comment

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Last edited at 23:05, 14 April 2007 (UTC). Substituted at 15:12, 1 May 2016 (UTC)

Applications,: Sporting goods

The first two paragraphs in this section list multiple unrelated items snd then these are followed by single-sentence entries per product.

Also, Kevlar is not often used to string tennis racquets, it use would be considered uncommon but still available as of 2015. — Preceding unsigned comment added by 160.94.167.79 (talk) 22:28, 17 March 2015 (UTC)


I've made it a bit better. The entire Applications section needs to be restructured, and is short references. Rwessel (talk) 09:41, 18 March 2015 (UTC)

Etymology

Any idea how the word "Kevlar" was created? Equinox (talk) 19:21, 10 September 2015 (UTC)

Needed Citations

I found potential references sources for the statement about use of Kevlar in bellows expansion joints in European Plastics News, Volume 9, 1982. Also in https://books.google.com/books?id=COgvEhUnFq8C&dq=kevlar+expansion+joint+bellows&lr=&source=gbs_navlinks_s p. 78 discusses rubber expansion joints, but does not mention Kevlar specifically, but p. 29-30 discussed Kevlar used in inflatable seals. A source for use in braided hoses is https://books.google.com/books?id=KQ5IAgAAQBAJ&dq=kevlar+braided+hose&lr=&source=gbs_navlinks_s, p. 349. Although I would rephrase to better reflect the sources. Thatcher57 (talk) 22:33, 18 August 2016 (UTC)

Soap Shoes?

I've been all over the archives Soap Shoes site and I can't find any verification for this claim that kevlar was used as speed control patches for certain Soap Shoes models. Jessamyn (talk) 19:05, 16 January 2017 (UTC)

was the solvent initially used for the polymerization

Such Polymers are not made by polymerization, but by polykondensation. 2A02:810B:C640:1970:F88D:530C:FD18:694F (talk) 11:47, 9 February 2017 (UTC)

That's still one of the forms of polymerisation. Andy Dingley (talk) 12:00, 9 February 2017 (UTC)

Semi-protected edit request on 15 February 2017

2601:18C:4201:B8BC:9D9:5821:6292:1333 (talk) 02:59, 15 February 2017 (UTC)

ɳɲɲɵɳɲɳɲɳɲɳɲɳ

Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format. DRAGON BOOSTER ★ 04:54, 15 February 2017 (UTC)

Semi-protected edit request on 21 June 2017

On the section

External links

DELETE the next Link

As is not related in any way with the article. 194.250.98.243 (talk) 09:57, 21 June 2017 (UTC)

 Done Andy Dingley (talk) 10:34, 21 June 2017 (UTC)

Semi-protected edit request on 17 August 2017

I dont know what the generic name is but it should have the genric name as Kevlar is a trademark and most articles use the generic name unless it talks about the brand 72.73.112.126 (talk) 23:21, 17 August 2017 (UTC)

Not done: please establish a consensus for this alteration before using the {{edit semi-protected}} template. jd22292 (Jalen D. Folf) (talk) 00:19, 18 August 2017 (UTC)

Sports use

Article says first use in trainers is by Nike in 2013 but there is a much earlier trainer - the Nike air resistance (1 and 2) which also had Kevlar and date from 1995. Ardgrain (talk) 23:01, 3 November 2017 (UTC)

External Link for Kevlar Synthesis Returns 404

The external link for the Synthesis of Kevlar is broken as it returns a 404 error. The Internet Archive link for the most recent capture is here - http://web.archive.org/web/20091103042718/web.mst.edu/~wlf/Synthesis/kevlar.html. 71.251.87.61 (talk) 20:41, 27 February 2018 (UTC)

 Done Spintendo      19:12, 28 February 2018 (UTC)

Proposed new section, "Legal"

polyaramid Kevlar patent
Initial patented structure of Kevlar polyaramid, indicating alkyl structure

— Preceding unsigned comment added by Ghutchis (talk • contribs) 18:24, 30 November 2018 (UTC)

Legal

polyaramid Kevlar patent
Initial patented structure of Kevlar polyaramid, indicating alkyl structure

— Preceding unsigned comment added by Ghutchis (talk • contribs) 18:24, 30 November 2018 (UTC)

In 1965, DuPont chemist Stephanie Kwolek invented a group of novel crystalline polyamides.[1] These polymers, when aligned, created fibers with heretofore unseen strength, which was particularly impressive as the material was incredibly lightweight. DuPont applied for a patent in 1965, and on November 22, 1966, U. S. Patent No. 3,287,323 was issued. It covered a class of novel crystalline polyamides that has the repeating unit seen in the figure to the right. Molecules with m integer from 4 through 8 are covered by this patent. While the patent does give information on how Kevlar fibers were created to apply for this patent, the method of making them is not protected, only the end result.[1]
DuPont has had several challenges to their Kevlar trademark and patent over the years. One of the more prominent cases is that of Azko v. DuPont.[2] Akzo, a Dutch company, argued that DuPont’s Kevlar patent and manufacture were infringing upon a patent held by Azko for creating very strong aramid fibers. The case went through eleven years of litigation in both countries, ending in 1988. At the end of litigation, both industrial giants agreed to cease all legal battles with one another and each were granted industrial patents for the manufacture of the ultra strong aramid fiber. Azko then began selling it under the name Twaron, while DuPont continued to manufacture Kevlar as they had been doing.[3]
On February 3, 2009, DuPont filed a lawsuit against Kolon Industries claiming that a former employee had retained highly confidential information on his home computer relating to the patented and trademark-protected Kevlar product. The accused employee then went to work for Kolon Industries, a rival company, where he purportedly passed on this information to Kolon Industries.[4] The employee plead guilty and was sentenced to 18 months in prison.[5] In 2011, a judge ruled in favor of DuPont, awarding $919.9 million in damages, though this was later reduced to $275 million in 2015.[6]
Legal and ethical controversy surround DuPont and its Kevlar exports. Kevlar, best known for making bulletproof vests, is a highly sought after material for militaries, police, and similar groups across the world. Kevlar was first tested by the United States Army during the Invasion of Grenada. The new Kevlar helmets saved the lives of at least two soldiers. The Army was incredibly pleased with the results and planned to buy one million of them to outfit its soldiers. Conflict arose, however, when it was found out that The Commerce Department had just authorized DuPont to sell enough Kevlar to Syria to make 30,000 bulletproof vests, as the Syrians were, at the time (1983), the enemy military force. With an American company selling American materials to a foreign military, the United States’ military leaders were in an uproar. The Commerce Department quickly tried to reverse the authorization to appease the Army, but DuPont and their Kevlar product were still brought under scrutiny for supplying to an enemy nation.[7]

Materials Science Class Project UpdatesMoleculargeeves (talk) 18:26, 30 November 2018 (UTC)

References

  1. ^ "Kevlar Patents: Everything You Need to Know". UpCounsel. Retrieved 2018-11-28.
  2. ^ Circuit., United States Court of Appeals,Federal (1987-02-05). "810 F2d 1148 Akzo v. Dupont". F2d (810). {{cite journal}}: Cite journal requires |journal= (help)CS1 maint: multiple names: authors list (link)
  3. ^ "COMPANY NEWS; Akzo-Du Pont Deal Ends 11-Year Fight". Retrieved 2018-11-28.
  4. ^ Rushe, Dominic (2011-09-15). "DuPont wins $900m Kevlar trade spy case". the Guardian. Retrieved 2018-11-28.
  5. ^ Schulz, William G. "Former DuPont Employee Sentenced | Chemical & Engineering News". cen.acs.org. Retrieved 2018-11-28.
  6. ^ Rushe, Dominic (2011-09-15). "DuPont wins $900m Kevlar trade spy case". the Guardian. Retrieved 2018-11-28.
  7. ^ "The Kevlar Heart of Commerce". Retrieved 2018-11-28.

Semi-protected edit request on 8 March 2021

Kevlar in water-poles adds great durability! With Ultra-high-mod (63 msi) it will make the water-fed-pole super-stiff too! SimPoleInc (talk) 01:20, 8 March 2021 (UTC)

 Not done: please provide reliable sources that support the change you want to be made. ◢  Ganbaruby!  (Say hi!) 01:59, 8 March 2021 (UTC)

Wiki Education Foundation-supported course assignment

This article was the subject of a Wiki Education Foundation-supported course assignment, between 28 August 2018 and 6 December 2018. Further details are available on the course page. Student editor(s): Ewodzanowski.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 01:44, 17 January 2022 (UTC)

Environmental impact, anyone?

Does anyone have access to reliable sources concerning the environmental impact of the manufacture, use, and after-use persistence of Kevlar? Whether it's squeaky clean or problematic, it might make an interesting section in the article. Thanks. --Frans Fowler (talk) 11:34, 20 May 2022 (UTC)

Jacob Lahijani Invented Kevlar 149 used in Ballistic and Aerospace Application

Jacob Lahijani Invented Kevlar 149 used in Ballistic and Aerospace Application . This article is misleading and falsely credits Stephanie Kowlek who did not invent Kevlar 149 used for ballistics. The video of Lahijani describing how and why he invented Kevlar 149 is in the Hagley Museum, under "Agents of Change". [2]https://digital.hagley.org/VID_2011320_B05_ID01[3]http://article.sapub.org/10.5923.j.textile.20120106.04.html InformationValidation (talk) 01:11, 19 January 2023 (UTC)

  • That paper you linked is so poorly written that we should check whether this isn't a predatory publication. Drmies (talk) 01:22, 19 January 2023 (UTC)
  • Ah, it is. Drmies (talk) 01:23, 19 January 2023 (UTC)
    • There are numerous cites, including The United States Patent Office. Please ensure feedback is factual, neutral and remain polite . This is a fact based request crediting the inventor of Kevlar 149 used in ballistic and aerospace application. Jacob Lahijani is the inventor of Kevlar 149 used in Ballistic and Aerospace Application. InformationValidation (talk) 02:38, 19 January 2023 (UTC)
      • Please don't patronize other editors. Drmies (talk) 02:53, 19 January 2023 (UTC)
        • This is fact based request. Please keep the feedback fact based as Wikipedia is a driven by facts and cited sources. Jacob Lahijani is the inventor of Kevlar 149 used in Ballistic and Aerospace Application . Please update the page accordingly. InformationValidation (talk) 03:09, 19 January 2023 (UTC)
Kevlar, the ballistic material, is a specific branded product, but including unrelated aramids allows borderline irrelevant asides about non-white non-men to decolonize the article. The sort of vandalism you've noticed will not be corrected, unfortunately, as it conforms with the popular bigotries shared by many active Wikipedia editors. Continuing to notice these sorts of issues will result in escalating threats and eventually action taken against your account. 64.121.126.15 (talk) 06:53, 12 March 2023 (UTC)
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