Nomex is a flame-resistant

meta Meta (from the Greek μετά, '' meta'', meaning "after" or "beyond") is a prefix meaning "more comprehensive" or "transcending". In modern nomenclature, ''meta''- can also serve as a prefix meaning self-referential, as a field of study or end ...

aramid Aramid fibers, short for aromatic polyamide, are a class of heat-resistant and strong synthetic fibers. They are used in aerospace and military applications, for ballistic-rated body armor fabric and ballistic composites, in marine cordage, mar ...

material developed in the early 1960s by

DuPont DuPont de Nemours, Inc., commonly shortened to DuPont, is an American multinational chemical company first formed in 1802 by French-American chemist and industrialist Éleuthère Irénée du Pont de Nemours. The company played a major role in ...

and first marketed in 1967.

Properties

Nomex and related aramid polymers are related to

nylon Nylon is a generic designation for a family of synthetic polymers composed of polyamides ( repeating units linked by amide links).The polyamides may be aliphatic or semi-aromatic. Nylon is a silk-like thermoplastic, generally made from pet ...

, but have

aromatic In chemistry, aromaticity is a chemical property of cyclic ( ring-shaped), ''typically'' planar (flat) molecular structures with pi bonds in resonance (those containing delocalized electrons) that gives increased stability compared to satur ...

backbones, and hence are more rigid and more durable. Nomex is an example of a ''

'' variant of the

s (

Kevlar Kevlar (para-aramid) is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, the high-strength material was first used commercially in the early 1970s a ...

is a ''

para Para, or PARA, may refer to: Businesses and organizations * Paramount Global, traded as PARA on the Nasdaq stock exchange * Para Group, the former name of CT Corp * Para Rubber, now Skellerup, a New Zealand manufacturer * Para USA, formerly ...

'' aramid). Unlike Kevlar, Nomex strands cannot align during filament

polymerization In polymer chemistry, polymerization (American English), or polymerisation (British English), is a process of reacting monomer molecules together in a chemical reaction to form polymer chains or three-dimensional networks. There are many f ...

and have less strength: its

ultimate tensile strength Ultimate tensile strength (UTS), often shortened to tensile strength (TS), ultimate strength, or F_\text within equations, is the maximum stress that a material can withstand while being stretched or pulled before breaking. In brittle materials ...

is 340 MPa. However, it has excellent thermal, chemical, and radiation resistance for a polymer material. It can withstand temperatures of up to 370 °C.

Production

Nomex is produced by

condensation reaction In organic chemistry, a condensation reaction is a type of chemical reaction in which two molecules are combined to form a single molecule, usually with the loss of a small molecule such as water. If water is lost, the reaction is also known as a ...

from the

monomer In chemistry, a monomer ( ; '' mono-'', "one" + '' -mer'', "part") is a molecule that can react together with other monomer molecules to form a larger polymer chain or three-dimensional network in a process called polymerization. Classification ...

s ''m''-phenylenediamine and isophthaloyl chloride. It is sold in both fiber and sheet forms and is used as a fabric where resistance from heat and flame is required. Nomex sheet is actually a calendered paper and made in a similar fashion. Nomex Type 410 paper was the first Nomex paper developed and one of the higher volume grades made, mostly for

electrical insulation An electrical insulator is a material in which electric current does not flow freely. The atoms of the insulator have tightly bound electrons which cannot readily move. Other materials—semiconductors and conductors—conduct electric current ...

purposes. Nomex fiber is made in the United States. Wilfred Sweeny (1926–2011), the DuPont scientist responsible for discoveries leading to Nomex, earned a DuPont

Lavoisier Medal A Lavoisier Medal is an award named and given in honor of Antoine Lavoisier, considered by some to be a father of modern chemistry.

in 2002 partly for this work.

Applications

Nomex Paper is used in electrical laminates such as circuit boards and transformer cores as well as fireproof

honeycomb structures Honeycomb structures are natural or man-made structures that have the geometry of a honeycomb to allow the minimization of the amount of used material to reach minimal weight and minimal material cost. The geometry of honeycomb structures can ...

where it is saturated with a

phenolic resin Phenol formaldehyde resins (PF) or phenolic resins (also infrequently called phenoplasts) are synthetic polymers obtained by the reaction of phenol or substituted phenol with formaldehyde. Used as the basis for Bakelite, PFs were the first commerc ...

. Honeycomb structures such as these, as well as

mylar BoPET (biaxially-oriented polyethylene terephthalate) is a polyester film made from stretched polyethylene terephthalate (PET) and is used for its high tensile strength, chemical and dimensional stability, transparency, reflectivity, gas and a ...

-Nomex laminates, are used extensively in aircraft construction. Firefighting, military aviation, and vehicle racing industries use Nomex to create clothing and equipment that can withstand intense heat. A Nomex hood is a common piece of racing and

firefighting Firefighting is the act of extinguishing or preventing the spread of unwanted fires from threatening human lives and destroying property and the environment. A person who engages in firefighting is known as a firefighter. Firefighters typically ...

equipment. It is placed on the

head A head is the part of an organism which usually includes the ears, brain, forehead, cheeks, chin, eyes, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste. Some very simple animals ...

on top of a

firefighter A firefighter is a first responder and rescuer extensively trained in firefighting, primarily to extinguish hazardous fires that threaten life, property, and the environment as well as to rescue people and in some cases or jurisdictions als ...

face The face is the front of an animal's head that features the eyes, nose and mouth, and through which animals express many of their emotions. The face is crucial for human identity, and damage such as scarring or developmental deformities may aff ...

mask. The hood protects the portions of the head not covered by the

helmet A helmet is a form of protective gear worn to protect the head. More specifically, a helmet complements the skull in protecting the human brain. Ceremonial or symbolic helmets (e.g., a policeman's helmet in the United Kingdom) without protect ...

and face mask from the intense

heat In thermodynamics, heat is defined as the form of energy crossing the boundary of a thermodynamic system by virtue of a temperature difference across the boundary. A thermodynamic system does not ''contain'' heat. Nevertheless, the term is ...

of the fire. Wildland firefighters wear Nomex shirts and trousers as part of their personal protective equipment during

wildfire suppression Wildfire suppression is a range of firefighting tactics used to suppress wildfires. Firefighting efforts in wild land areas require different techniques, equipment, and training from the more familiar structure fire fighting found in populated ...

activities. Racing car drivers wear driving suits constructed of Nomex and or other fire retardant materials, along with Nomex gloves, long underwear, balaclavas, socks,

lining and shoes, to protect them in the event of a

fire Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. At a certain point in the combustion reaction, called the ignition point, flames ...

Military A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. It is typically authorized and maintained by a sovereign state, with its members identifiable by their distinct ...

pilots and aircrew wear

flight suit A flight suit is a full-body garment, worn while flying aircraft such as military airplanes, gliders and helicopters. These suits are generally made to keep the wearer warm, as well as being practical (plenty of pockets), and durable (includi ...

s made of over 92 percent Nomex to protect them from

cockpit A cockpit or flight deck is the area, usually near the front of an aircraft or spacecraft, from which a pilot controls the aircraft. The cockpit of an aircraft contains flight instruments on an instrument panel, and the controls that e ...

fires. Troops riding in ground vehicles often wear Nomex for fire protection. Kevlar thread is often used to hold the fabric together at seams. Military tank drivers also typically use Nomex hoods as protection against fire. In the U.S. space program, Nomex has been used for the

Thermal Micrometeoroid Garment An (Integrated) Thermal Micrometeoroid Garment (TMG or ITMG) is the outer layer of a space suit. The TMG has three functions: to insulate the suit occupant and prevent heat loss, to shield the occupant from harmful solar radiation, and to protec ...

on the

Extravehicular Mobility Unit The Extravehicular Mobility Unit (EMU) is an independent anthropomorphic spacesuit that provides environmental protection, mobility, life support, and communications for astronauts performing extravehicular activity (EVA) in Earth orbit. Introduc ...

(in conjunction with

and

Gore-Tex Gore-Tex is a waterproof, breathable fabric membrane and registered trademark of W. L. Gore & Associates. Invented in 1969, Gore-Tex can repel liquid water while allowing water vapor to pass through and is designed to be a lightweight, waterpr ...

) and

ACES ACeS (PT Asia Cellular Satellite) was a regional satellite telecommunications company based in Jakarta, Indonesia. It offered GSM-like satellite telephony services to Asian market. The coverage area included Indonesia, Malaysia, Thailand, Philip ...

pressure suit, both for fire and extreme environment (water immersion to near vacuum) protection, and as thermal blankets on the payload bay doors, fuselage, and upper wing surfaces of the

Space Shuttle The Space Shuttle is a retired, partially reusable low Earth orbital spacecraft system operated from 1981 to 2011 by the U.S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. Its official program n ...

Orbiter. It has also been used for the airbags for the

Mars Pathfinder ''Mars Pathfinder'' (''MESUR Pathfinder'') is an American robotic spacecraft that landed a base station with a roving probe on Mars in 1997. It consisted of a lander, renamed the Carl Sagan Memorial Station, and a lightweight, wheeled robot ...

and

Mars Exploration Rover NASA's Mars Exploration Rover (MER) mission was a robotic space mission involving two Mars rovers, '' Spirit'' and '' Opportunity'', exploring the planet Mars. It began in 2003 with the launch of the two rovers to explore the Martian surface ...

missions , the Galileo atmospheric probe, the Cassini-Huygens

Titan Titan most often refers to: * Titan (moon), the largest moon of Saturn * Titans, a race of deities in Greek mythology Titan or Titans may also refer to: Arts and entertainment Fictional entities Fictional locations * Titan in fiction, fictiona ...

probe, as an external covering on the AERCam Sprint, and is planned to be incorporated into NASA's upcoming

Crew Exploration Vehicle The Crew Exploration Vehicle (CEV) was a component of the U.S. NASA Vision for Space Exploration plan. A competition was held to design a spacecraft that could carry humans to the destinations envisioned by the plan. The winning design was th ...

. Nomex has been used as an acoustic material in Troy, NY, at Rensselaer Polytechnic Institute's Experimental Media and Performing Arts Center (

EMPAC The Curtis R. Priem Experimental Media and Performing Arts Center (EMPAC) is a multi-venue arts center at Rensselaer Polytechnic Institute in Troy, New York, which opened on October 3, 2008. The building is named after Curtis Priem, co-founder of ...

) main concert hall. A ceiling canopy of Nomex reflects high and mid frequency sound, providing reverberation, while letting lower frequency sound partially pass through the canopy. According to RPI President Shirley Ann Jackson, EMPAC is the first venue in the world to use Nomex as an architectural material for acoustic reasons. Nomex (like Kevlar) is also used in the production of

loudspeaker A loudspeaker (commonly referred to as a speaker or speaker driver) is an electroacoustic transducer that converts an electrical audio signal into a corresponding sound. A ''speaker system'', also often simply referred to as a "speaker" or ...

drivers. Honeycomb-structured Nomex paper is used as a spacer between layers of lead in the

ATLAS An atlas is a collection of maps; it is typically a bundle of maps of Earth or of a region of Earth. Atlases have traditionally been bound into book form, but today many atlases are in multimedia formats. In addition to presenting geogra ...

Liquid Argon Calorimeter, and as a laminate core for hull and deck construction in custom boats such as Stiletto Catamarans like the Stiletto 27. Nomex is used in industrial applications as a filter in exhaust filtration systems, typically a

baghouse A baghouse, also known as a baghouse filter, bag filter, or fabric filter is an air pollution control device and dust collector that removes particulates or gas released from commercial processes out of the air. Power plants, steel mills, pharmaceu ...

, that deal with hot gas emissions found in asphalt plants, cement plants, steel smelting facilities, and non-ferrous metal production facilities. Nomex is used in some

classical guitar The classical guitar (also known as the nylon-string guitar or Spanish guitar) is a member of the guitar family used in classical music and other styles. An acoustic wooden string instrument with strings made of gut or nylon, it is a precursor o ...

tops in order to create a 'composite' soundboard. When Nomex is laminated between 2 spruce or cedar 'skins', a rigid and lightweight plate is produced, which can improve the efficiency of the soundboard. While the 'laminated' technique was created by Matthias Dammann, the use of Nomex within was first employed by

luthier A luthier ( ; AmE also ) is a craftsperson who builds or repairs string instruments that have a neck and a sound box. The word "luthier" is originally French and comes from the French word for lute. The term was originally used for makers of ...

Gernot Wagner.

History

The deaths in fiery crashes of race car drivers

Fireball Roberts Edward Glenn "Fireball" Roberts Jr. (January 20, 1929July 2, 1964) was an American stock car racer. Background Roberts was born in Tavares, Florida, and raised in Apopka, Florida, where he was interested in both auto racing and baseball. He was ...

at Charlotte, and

Eddie Sachs Edward Julius Sachs Jr, (May 28, 1927 – May 30, 1964) was a United States Auto Club driver who was known as the "Clown Prince of Auto Racing". He coined the phrase "If you can't win, be spectacular". Early life Sachs was born May 28, 1927 in A ...

and

Dave MacDonald David George MacDonald (July 23, 1936 – May 30, 1964) was an American road racing champion noted for his successes driving Corvettes and Shelby Cobras in the early 1960s. At the age of 27, he was killed in the 1964 Indianapolis 500, alon ...

at Indianapolis in 1964, led to the use of flame-resistant fabrics such as Nomex. In early 1966 ''Competition Press and Autoweek'' reported: "During the past season, experimental driving suits were worn by

Walt Hansgen Walter Edwin Hansgen (October 28, 1919 – April 7, 1966) was an American racecar driver. His motorsport career began as a road racing driver, he made his Grand Prix debut at 41 and he died aged 46, several days after crashing during testing for ...

Masten Gregory Masten Gregory (February 29, 1932 − November 8, 1985) was an American racing driver. He raced in Formula One between and , participating in 43 World Championship races, and numerous non-Championship races. He was also a successful sports car r ...

Marvin Panch Marvin Panch (May 28, 1926December 31, 2015) was an American stock car racing driver. Winner of the 1961 Daytona 500 and 1966 World 600, he won seventeen NASCAR Grand National Series events during a 17-year career. Early career Born in Menom ...

and Group 44's

Bob Tullius Robert Charles "Bob" Tullius was born 7 December 1930 in Rochester, New York. He is best known as a race car driver and racing team owner. Early years Tullius considered a career in teaching after graduating from high school. He served a term in ...

; these four representing a fairly good cross section in the sport. The goal was to get use-test information on the comfort and laundering characteristics of Nomex. The Chrysler-Plymouth team at the recent Motor Trend 500 at Riverside also wore these suits."''Competition Press and Autoweek'', April 9, 1966, Page 17.

References

External links