Qhov Kevlar Fabric no yog tsib npaug zog dua li cov hlau

Textile durability thiab daim ntawv thov ntawm high-strength textiles yog nquag tham txog cov ntsiab lus ntawm peb blog, nrog rau txhua yam ntawm tarps rau Cordura. Cov textiles elastic heev no zoo tagnrho rau cov neeg teb thawj zaug, kev siv tub rog thiab kev tiv thaiv tus kheej, thiab txhua yam khoom siv sewn uas yuav tsum tau muaj kev cuam tshuam rau cov ntsiab lus degrading, tshwj xeeb tshaj yog thaum tshav kub kub lossis txias txias. Kevlar, qhov kev tshawb pom tsis zoo ntawm tus kws kho mob Stephanie Kwolek, yog ib qho ntawm cov ntaub ntawv muaj zog tshaj plaws thiab ntau yam, khav theeb xws li lub zog tensile-rau-hnyav piv uas nws yog tsib zaug muaj zog dua hlau.

Kevlar yog cov khoom siv hluavtaws, yooj yim muab, cov yas woven muaj zog heev.

Tsim tawm ntawm qhov tsis muaj nyob hauv xyoo 1964, cov ntaub ntawv tau tsim los ua ib qho kev daws teeb meem rau kev tsim cov log tsheb sib zog tsis tau muaj zog dua thaum muaj roj av tsis txaus. Kev sim ntxiv thiab kev txhim kho tau tshwm sim tom qab pom nws qhov tawv thiab muaj peev xwm tiv taus cov kev sim uas lwm cov kev daws teeb meem nylon tsis tuaj yeem. Cov txiaj ntsig ntawm polymer chemistry cuam tshuam nrog cov molecular muaj pes tsawg leeg thiab chemistry ntawm hluavtaws polymers.

Kevlar lub zog tsis yog los ntawm txoj kev uas cov fibers yog spun thiab woven, tab sis kuj los ntawm nws cov qauv molecular; Synthetic aramids (hom molecule siv los ua Kevlar) muaj ntev, sib npaug molecular chains uas tau ua kom muaj zog los ntawm kev tsim cov ntaub. Kevlar cov qauv tshuaj yuav tsum tau tsim ua ntej nws tuaj yeem raug spun los ntawm kev txuas cov hlua ntev ntawm tib lub molecule uas rov ua dua thiab tuav nruj ua ke nrog hydrogen molecules. Cov fibers yog tsim los ntawm cov txheej txheem "ntub spinning" uas ua kom tag nrho cov molecules nyob rau hauv tib txoj kev los ntawm cua sov cov nplaum molecular khoom thiab dhau cov khoom los ntawm ib tug spinneret. Thaum txiav thiab nruj nreem rau hauv cov ntaub ntawv, Kevlar yog npaj rau daim ntawv thov teb.

Daim ntawv thov Kevlar feem ntau siv tau yog cov tsho tiv thaiv mos txwv. Lub nruj molecular muaj pes tsawg leeg ua ke nrog nruj weave ntawm cov ntaub ua rau nws nyuaj rau nkag mus nrog ib tug mos txwv los yog riam. Txawm hais tias nws tsis yog indestructible, nws absorbs feem ntau blows thiab ua puas tsawg dua rau cov neeg hnav. Armed nrog cov kev paub no, ntau lub tsho tiv thaiv mos txwv yog tsim los nrog ntau txheej ntawm Kevlar, uas txhais tau tias muaj kev tiv thaiv ntau dua thiab kev tawm tsam kev nqus. Lwm yam kev siv muaj xws li lub thawv rau khaub ncaws uas tsim los rau kev tiv thaiv siab tshaj plaws, cov khoom siv hauv tsheb xws li cov brakes thiab cov khoom siv sab hauv, cov log tsheb, cov khoom siv archery xws li bowstrings, thiab txawm lub cev sab nrauv ntawm lub dav hlau, nkoj thiab tsheb.

Kev siv cov khoom siv ballistic no, muaj peev xwm ua ke nrog lub cev muaj peev xwm sib koom ua ke, tuaj yeem hloov kho kev tiv thaiv tus kheej rau leej twg los ntawm thawj cov neeg teb rau tub rog.