Ultra-High Molecular Nyhav Polyethylene (UHMWPE) thiab Kevlar yog ob qho tib si hluavtaws fibers uas nrov tshaj plaws siv hauv kev tsim lub cev armor thiab tiv thaiv iav. Thaum lawv sib koom ntau yam khoom zoo sib xws, muaj kev sib cav tsis tu ncua ntawm cov kws tshaj lij txog qhov twg muaj kev tiv thaiv zoo dua. Hauv tsab xov xwm no, peb yuav tshuaj xyuas cov khoom ntawm UHMWPE thiab Kevlar, thiab txiav txim siab seb qhov twg muaj kev puas tsuaj zoo dua.
Properties of UHMWPE
UHMWPE yog ib hom thermoplastic polyethylene uas muaj cov qauv ntawm cov saw hlau ntev heev. Raws li qhov tshwm sim, nws muaj lub zog tensile zoo, muaj kev cuam tshuam zoo, thiab kev ruaj ntseg tshuaj zoo dua. Ntxiv mus, nws yog ib qho zoo heev insulator ntawm tshav kub thiab hluav taws xob, ua rau nws zoo tagnrho rau ntau yam kev siv.
Ib qho zoo tshaj plaws ntawm UHMWPE tshaj lwm cov fibers yog nws lub peev xwm los tiv thaiv puas. UHMWPE muaj kev tiv thaiv zoo heev rau kev puas tsuaj, txhais tau tias nws tuaj yeem tiv taus hnyav hnyav thiab tsim kua muag yam tsis tau poob nws lub cev thiab lub zog. Qhov no ua rau UHMWPE fibers yog qhov kev xaiv zoo tshaj plaws rau cov khoom lag luam uas xav tau cov khoom siv muaj zog, ruaj khov, thiab siv tau ntev, xws li lub cev armor, hlua, thiab nuv ntses kab.
Properties of Kevlar
Kevlar yog lub zog hluavtaws fiber ntau tsim los ntawm DuPont, uas yog siv rau hauv ntau yam lag luam vim nws cov khoom tshwj xeeb. Kevlar yog ua los ntawm cov saw ntev ntawm cov khoom siv polymer molecules teem rau ib leeg, uas muab nws lub zog tshwj xeeb. Zoo li UHMWPE, Kevlar tseem paub txog nws qhov kev tiv thaiv zoo tshaj plaws thiab muaj peev xwm nqus tau lub zog.
Kevlar kuj tseem paub txog nws txoj kev puas tsuaj zoo heev. Cov fibers yog tawv, rugged, thiab ruaj, ua rau lawv zoo tagnrho rau cov khoom uas yuav tsum tau tiv taus hnyav hnyav thiab tsim kua muag. Kevlar tau siv rau hauv ntau daim ntawv thov, xws li cov iav tiv thaiv, lub tsho tiv thaiv mos txwv, thiab lub tsho tiv thaiv tsheb.
UHMWPE vs Kevlar
Thaum nws los txog rau kev puas tsuaj, ob qho tib si UHMWPE thiab Kevlar fibers yog cov resistant rau hnav thiab tsim kua muag. Txawm li cas los xij, UHMWPE muaj me ntsis ntug ntawm Kevlar hauv qhov no. UHMWPE muaj kev puas tsuaj ntau dua li Kevlar, ua rau nws muaj kev xaiv zoo dua rau cov ntawv thov uas puas yog qhov tseem ceeb.
UHMWPE kuj tseem tiv taus tshuaj ntau dua Kevlar. Nws tuaj yeem tiv taus cov kua qaub lossis qhov chaw ib puag ncig yam tsis muaj kev puas tsuaj loj, thaum Kevlar tuaj yeem pib tawg hauv cov xwm txheej zoo li no. Qhov no ua rau UHMWPE zoo tagnrho rau cov ntawv thov uas cuam tshuam rau cov tshuaj lom neeg, xws li hauv kev lag luam tsheb thiab tshuaj lom neeg.
Lwm thaj chaw uas UHMWPE outperforms Kevlar yog hais txog qhov hnyav. UHMWPE yog qhov sib zog dua Kevlar, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov uas qhov hnyav yog qhov tseem ceeb, xws li hauv lub cev armor lossis cov iav tiv thaiv.
Hauv kev xaus, ob qho tib si UHMWPE thiab Kevlar muab tshwj xeeb rau kev puas tsuaj thiab yog qhov zoo tagnrho rau ntau yam kev siv. Txawm li cas los xij, rau cov ntawv thov uas xav tau cov qib siab ntawm kev puas tsuaj, UHMWPE yog qhov kev xaiv zoo dua vim nws qhov kev tiv thaiv zoo dua rau hnav thiab tsim kua muag. Tsis tas li ntawd, UHMWPE tseem muaj cov tshuaj tiv thaiv ntau dua thiab sib zog dua Kevlar, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev lag luam uas qhov hnyav thiab tshuaj lom neeg yog qhov tseem ceeb. Yog li ntawd, txhua qhov kev txiav txim siab txog kev siv fiber ntau yuav tsum yog raws li cov cai tshwj xeeb ntawm daim ntawv thov.
