Kevlar yog ib hom khoom siv hluavtaws uas feem ntau siv hauv ntau qhov kev lag luam vim nws cov khoom tshwj xeeb ntawm lub zog thiab ua haujlwm ntev. Nws yog dav siv nyob rau hauv kev tsim cov mos txwv vests, log tsheb, ropes, thiab lwm yam kev siv uas yuav tsum tau muaj kev tiv thaiv siab thiab ntev. Raws li ib tug kws tshaj lij hauv kev lag luam textiles, kuv feem ntau nug txog kev ua neej nyob ntawm Kevlar cov khoom. Hauv tsab xov xwm no, kuv yuav muab cov lus qhia dav dav ntawm Kevlar thiab nws txoj sia.
Yuav pib nrog, Kevlar yog ib hom khoom siv polymer uas yog thawj zaug tsim los ntawm Stephanie Kwolek ntawm DuPont xyoo 1965. Nws yog ib hom aramid fiber ntau uas muaj zog heev thiab tiv taus cua sov. Nws yog Ameslikas tsim los siv rau hauv cov log tsheb tab sis txij li thaum nws tau pom nws txoj hauv kev mus rau ntau yam ntawm lwm yam kev siv. Kevlar paub txog nws lub zog tensile zoo, uas yog siab dua li cov hlau. Nws kuj yog heev resistant rau abrasion, tshuaj, thiab tej yam.
Thaum nws los txog rau Kevlar lifespan, muaj ob peb yam los xav txog. Ua ntej, lub neej ntawm Kevlar cov khoom yuav txawv nyob ntawm daim ntawv thov thiab lawv khaws cia zoo npaum li cas. Piv txwv li, lub tsho tiv thaiv Kevlar cov mos txwv uas tau siv ntau zaus thiab raug mob hnyav yuav muaj lub neej luv dua li Kevlar hlua uas siv tsis tu ncua thiab khaws cia kom zoo.
Lwm qhov yuav tsum tau xav txog yog kev degradation ntawm Kevlar lub sijhawm. Zoo li txhua yam ntaub ntawv, Kevlar yuav kawg degrade vim raug rau ib puag ncig yam xws li tshav kub, UV hluav taws xob, thiab ya raws. Txawm li cas los xij, Kevlar tau pom tias muaj lub neej ntev dua piv rau lwm cov ntaub ntawv. Hauv kev sim kuaj, Kevlar tau pom tias nws lub zog thiab kev ncaj ncees mus txog 20 xyoo thaum raug rau ib puag ncig ib puag ncig. Qee zaum, Kevlar cov khoom tau paub tias yuav kav ntev dua qhov no.
Nws tseem tsim nyog sau cia tias Kevlar tuaj yeem ntxiv dag zog lossis ua ke nrog lwm cov ntaub ntawv los ua kom nws lub neej ntev. Piv txwv li, Kevlar tuaj yeem sib xyaw nrog lwm cov fibers xws li Twaron lossis Spectra los tsim cov ntaub ntawv uas muaj zog thiab ruaj khov dua li Kevlar ntshiab. Qhov no feem ntau ua tiav hauv cov ntawv thov xws li cov tsho tiv thaiv mos txwv lossis cov kaus mom hlau uas yuav tsum tau muaj kev tiv thaiv ntau tshaj plaws.
Yuav tiv tauj peb li cas?
