Nomex

Nomex is a registered trademark for flame-resistant meta-aramid material developed in the early 1960s by DuPont and first marketed in 1967.

Properties

Nomex and related aramid polymers are related to nylon, but have aromatic backbones, and hence are more rigid and more durable. Nomex is the premier example of a meta variant of the aramids (Kevlar is a para aramid). Unlike Kevlar, Nomex cannot align during filament formation and has poorer strength. However, it has excellent thermal, chemical, and radiation resistance for a polymer material.

Production

The polymer is produced by condensation reaction from the monomers m-phenylenediamine and isophthaloyl chloride.

It is sold in both fiber and sheet forms and is used as a fabric wherever resistance from heat and flame is required. Nomex sheet is actually a calendered paper and made in a similar fashion. Nomex Type 410 paper is the original and one of the larger grade types made, mostly for electrical insulation purposes. Nomex fiber is made in the USA and in Spain(Asturias).

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Irritant

Irritant may refer to:

A stimulus or agent which causes irritation

Irritant (album), a 2002 psychedelic trance album

Irritant (band), a United Kingdom rock musical group

Irritant Records, an independent record label

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Irritation

Irritation, in biology and physiology, is a state of inflammation or painful reaction to allergy or cell-lining damage. A stimulus or agent which induces the state of irritation is an irritant. Irritants are typically thought of as chemical agents (for example phenol and capsaicin) but mechanical, thermal (heat), and radiative stimuli (for example ultraviolet light or ionising radiations) can also be irritants. Irritation also has non-clinical usages referring to bothersome physical or psychological pain or discomfort.

Irritation can also be induced by some allergic response due to exposure of some allergens for example contact dermatitis, irritation of mucousal membranes and pruritis.Mucosal membrane is most common site of irritation because it contains secretory glands that release mucous which attracts the allergens due to its sticky nature.

Chronic irritation is a medical term signifying that afflictive health conditions have been present for a while. There are many disorders that can cause chronic irritation, the majority involves the skin, vagina, eyes and lungs.

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Irritant (band)

Irritant were a progressive rock / heavy metal band from Gloucester, England, UK, formed in 2002. They originally described themselves as an "independent hard rock band", and flirted with rap, but developed a blend of progressive metal and hard rock. They cited among their influences Black Sabbath, Pink Floyd, Iron Maiden, Rush, Avenged Sevenfold, Guns 'n' Roses, AFI, 80s metal and late 60s progressive rock.

Their 2007 single "Voice of the Siren", described by the BBC as a "gargantuan rock classic", was produced by Vic Coppersmith-Heaven (who previously worked with Black Sabbath, The Jam, and The Rolling Stones) and reached No. 70 on the UK Singles Chart. They band split on 8 February 2008.