nomex™ polyaramid

8/19/2019 Nomex™ polyaramid

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NOMEX™ POLYARAMID

INTRODUCTION

Discovered: 1958, by P.W. Morgan (Du Pont).

Commercialized:1967, in fiber form, by Du Pont.

Key properties: Very good thermal resistance

Essentially flameproof in fabric form. Good

resistance to organic solvents (because of

crystallinity) but attacked and hydrolysed by strong

acids and bases, especially at high temperatures.

Excellent dimensional stability. Rated for

continuous use in electrical applications (several

thousand hours) at 200 deg.C. Very much higher

resistance to radiation than aliphatic polyamides.


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Applications OverviewBecause of its excellent physical and thermal

properties. NOMEX brand fiber is used in a

wide variety of applications, includingindustrial coated fabrics,ironingor pressing-

machine covers, rubber hose reinforcement,

felt scrims, and the three leading Applications:

Thermal Protective Apparel, Filtration and

Thermal-resistant furnishings.


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NOMEX® APPLICATIONS FOR MILITARY FORCES

With over 40 years experience in the personal protection sector,

DuPont offers a wide range of proven, science-based solutions

such as KevlaNomex® fibers are used across a broad range of applications.

It is a critical component in protective apparel and accessories as

used by fire fighters; police officers; first responders; civil rescue

teams; civilian, police and military pilots; military sailors and ground

forces all over the world.Nomex® protects the wearer from the

flames and the intense heat thoseforces may encounter. It offers

superior thermal insulation, durability and freedom of movement's

and Nomex®


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PROTECTING OUR PROTECTORS

AGAINST THERMAL HAZARDSNOMEX® USED IN PERSONAL PROTECTIVE CLOTHING RESPONDS TO A

WIDE VARIETY OF MILITARY END USES. FROM SUBMARINE CREW AND

MARINE SAILORS TO INFANTRY TROOPS, MRAP VEHICLE CREW, DEMINERS,

PARAMEDICS AND LOGISTIC STAFF, THEY HAVE FOUND RELIABLE AND TRUSTED

SOLUTIONS IN THE NOMEX® GARMENTS, WHETHER THEIR HAZARDS ARE

FLASH FIRE, FIRE, EXPLOSION, ELECTRICAL ARC, MOLTEN METAL SPLASHES,

STATIC DISCHARGE, CHEMICAL REPELLENCE OR LOW VISIBILITY.


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The NOMEX® fiber helps to reduce burn

injury in three ways:

1.The fiber itself absorbs heat energy during

the carbonization process.

2.The fiber swells and seals openings in the

fabric, decreasing air movement and the

associated convective heat transfer.

3.Both the fiber and the fabric thicken,

increasing the insulative barrier andreducing conductive heat transfer.


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Before Exposure After ExposureDuring Exposure


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Industrial ApplicationsOccupational Safety and Health

Administration regulations, American Society

for Testing and Materials standards and

corporate safety guidelines drive adoption offlame-resistant clothing for worker protection

where a flash fire or electric arc hazard is

identified. Chemical, petrochemical and utility

workers wear clothing of NOMEX®


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Filtration Applications

Filter bags of NOMEX® are the industry

leader in asphalt manufacturing facilities, as

well as a variety of other applications. Filter

bags of NOMEX® permit these facilities to

operate at higher temperatures, whichsignificantly improves capacity, lowers power

costs and eliminates condensation.


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WHY NOMEX®?

Nomex® is aninherently flame-resistant,

high-temperatureresistant meta- aramidfiber that doesn’t melt and drip or support

combustion in the air. A key factor in the

protection provided by Nomex® is its ability to

carbonize and thicken when exposed to intense

heat.

This typical reaction increases the protectivebarrier between the heat source and the

wearer’s skin and minimizes burn injury,

almost comparable to the way a modern car

protects its occupants with air-bags.


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Nomex® derives its flame resistant properties

from itsunique structure of aromatic

rings and conjugated amide bonds. As

thisthermal behavior is obtained by its

molecular structure and not by applying a

flame retardant chemical substance to thefabric, yarn, fiber or polymer. Nomex® offers

permanent protection, which cannot be

washed out or worn away. Fabrics from

Nomex® are soft, lightweight, behave like a

traditional textile fabric and are therefore

extremelycomfortable to wear.

The absence of any flame retardant chemical

substance reduces substantially the amount of

smoke and chemical gasses created

in case of fire enabling military forces to keep

a clear eye on the dangerous environment they

are in,and reduce the risk of lungs irritation.


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Chemical ResistanceIn general, NOMEX® fiber exhibits very good

resistance to many chemicals. It is highly

resistant to most hydrocarbons and organic

solvents. Chemical resistance during exposure

in use and to chemicals and solvents used incleaning contributes to the excellent durability

and wear life of garments of NOMEX


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UV LightLike other natural and synthetic textile

materials, most types of NOMEX® are

impacted by prolonged exposureto ultraviolet (UV) radiation from both

sunlight and artificial light sources.


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NOMEX® – THE FIBER THAT

REACTS IN A CRISIS

Durable performance + great value for money

Outer shell fabrics from Nomex® brand fiber wash well, are extremely

hard wearing and resistant to tear over their wear life. On a longer term

comparative cost basis Nomex® actually helps to reduce clothing budgets.

When you see the Nomex® labels and tags, it’s an immediate

assurance that the performance of the outer shell fabric and the

multilayer garment constructions surpass all regional and country

specific norms for heat and flame protection.

nomex™ polyaramid

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