Heat-resistant and strong aromatic polyamide fiber
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
Kevlar (para-aramid)[2] is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965,[3][2][4] the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires. It is typically spun into ropes or fabric sheets that can be used as such, or as an ingredient in composite material components.
Kevlar has many applications, ranging from bicycle tires and racing sails to bulletproof vests, all due to its high tensile strength-to-weight ratio; by this measure it is five times stronger than steel.[2] It is also used to make modern marching drumheads that withstand high impact; and for mooring lines and other underwater applications.
A similar fiber called Twaron with the same chemical structure was developed by Akzo in the 1970s; commercial production started in 1986, and Twaron is manufactured by Teijin.[5][6]
^Mormann, Werner; Hellwich, Karl-Heinz; Chen, Jiazhong; Wilks, Edward S. (2017). "Preferred names of constitutional units for use in structure-based names of polymers (IUPAC Recommendations 2016)". Pure and Applied Chemistry. 89 (11): 1695–1736 [1732]. doi:10.1515/pac-2016-0502. S2CID 104022755.
^ abc"What is Kevlar". DuPont. Archived from the original on 2007-03-20. Retrieved 2007-03-28.
^Mera, Hiroshi; Takata, Tadahiko (2000). "High-Performance Fibers". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a13_001. ISBN 978-3527306732.
^"Wholly aromatic carbocyclic polycarbonamide fiber having orientation... - US 3819587 A - IP.com". ip.com.
^Tatsuya Hongū, Glyn O. Phillips, New Fibers, Ellis Horwood, 1990, p. 22
^J. K. Fink, Handbook of Engineering and Specialty Thermoplastics: Polyolefins and Styrenics, Scrivener Publishing, 2010, p. 35
Kevlar (para-aramid) is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at...
Kevlar KM2 is a synthetic para-aramid fibre produced by DuPont. The fiber is an evolution of the original Kevlar fibre. The following quotes summarise...
the PASGT helmet was most commonly known by its wearers as simply the "Kevlar". The nickname has since been adopted for usage with other helmets. The...
1923 – June 18, 2014) is an American chemist who is known for inventing Kevlar. Her career at the DuPont company spanned more than 40 years. She discovered...
mid-1970s, DuPont, the company which employed Kwolek, introduced Kevlar. Immediately Kevlar was incorporated into a National Institute of Justice (NIJ) evaluation...
The M83 kevlar helmet is a combat helmet of South African manufactured by South African Pith Helmet Industries (S.A.P.H.I) of Rosslyn, adopted in 1983...
introduced Kevlar Edge, a fiber developed specifically for sails with 25% higher flex strength and a higher modulus than Kevlar 49. Kevlar, along with...
neat Kevlar and STF-Kevlar samples. The test proved that the STF-Kevlar was able to show a result that was slightly better than the neat Kevlar. The samples...
high melting point (>500 °C (932 °F)). Common aramid brand names include Kevlar, Nomex, and Twaron. The term aramid is shortened from aromatic polyamide...
manufactured by South African Pith Helmet Industries (S.A.P.H.I) of Rosslyn. The kevlar composite M87 replaced the steel M63 helmet during the late 1980s, and saw...
Nomex is an example of a meta variant of the aramids (Kevlar is a para aramid). Unlike Kevlar, Nomex strands cannot align during filament polymerization...
November 20, 2009) was a researcher who developed Kevlar for the use in ballistic vests. Kevlar's use in ballistic vests was later expanded for use in...
a fire, and Kevlar such as vests for police officers, security, and SWAT. The latest Kevlar material that DuPont has developed is Kevlar XP. In comparison...
"Differences Between Kevlar and Twaron | Difference Between". www.differencebetween.net. 3 April 2013. Retrieved 30 March 2018. "Kevlar PASGT Helmet". "combat...
also later used by NASA as one of the materials, combined with nylon and Kevlar, making up the parachute that was used to perform a braking manoeuvre during...
terephthalic acid. It is a white solid. It is one of two precursors used to make Kevlar, the other being p-phenylenediamine. TCL is used as a key component in performance...
including natural gut and synthetic stings made from materials such as nylon, kevlar, or polyester. The first type of tennis strings available were natural gut...
function are sometimes worn. Soldiers wear combat helmets, often made from Kevlar or other lightweight synthetic fibers. The word helmet is derived from helm...
personal protective equipment for fencing is made of tough cotton or nylon. Kevlar was added to top level uniform pieces (jacket, breeches, underarm protector...
the suit. Most bomb suits, such as the Advanced Bomb Suit, use layers of Kevlar, foam, and plastic to accomplish these functions. In order to maximize protection...
Kourounis, Interview with National Geographic Kourounis used a custom-made Kevlar harness and multiple Technora ropes attached to a full-body aluminized suit...
traditionally made of wood, but are now often made also with fibreglass, kevlar or carbon fibre composites. Metal is forbidden from use in field hockey...
definitive date yet planned. Current Q1 and Q1R models feature a fully carbon-kevlar body. The 2015 Rossion Q1 has a maximum power of 508 bhp (515 PS; 379 kW)...
The filling in these shields is usually a high-strength material like Kevlar or Nextel aluminium oxide fiber. The type of shield, the material, thickness...
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