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45_492618f1a386d64b3214b2ba47f628ad
2010-12-03 22:35:03

Kevlar, a trademark of para-aramid synthetic fiber, is related to other aramids such as Nomex and Technora. DuPont developed Kevlar in 1965 and was first commercially used in the 1970s as a replacement for steel in racing tires. Its normal form is as a rope or a sheet of fabric that can be used as an ingredient in composite material components. Kevlar is used in bicycle tires, racing sails, and body armor due to its high tensile strength-to-weight ratio. Twaron, produced in 1978, is a...

45_5b86f15a3b4b775b2bbe988cb5567159
2010-11-19 17:31:54

Kevlar, a trademark of para-aramid synthetic fiber, is related to other aramids such as Nomex and Technora. DuPont developed Kevlar in 1965 and was first commercially used in the 1970s as a replacement for steel in racing tires. Its normal form is as a rope or a sheet of fabric that can be used as an ingredient in composite material components. Kevlar is used in bicycle tires, racing sails, and body armor due to its high tensile strength-to-weight ratio. Twaron, produced in 1978, is a...

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Word of the Day
cock-a-hoop
  • Exultant; jubilant; triumphant; on the high horse.
  • Tipsy; slightly intoxicated.
This word may come from the phrase 'to set cock on hoop,' or 'to drink festively.' Its origin otherwise is unclear. A theory, according to the Word Detective, is that it's a 'transliteration of the French phrase 'coq a huppe,' meaning a rooster displaying its crest ('huppe') in a pose of proud defiance.' Therefore, 'cock-a-hoop' would 'liken a drunken man to a boastful and aggressive rooster.'
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