Kevlar - mea he kemikala puluniu, ka 'epekema inoa o "aramid, polyparaphenylene terephthalamide." I ka 1965, e hoʻomohala i ka US huakai DuPont. Manawa i kona kiʻekiʻe ikaika (3620 MPa), he kū hoʻokahi aiiay waiwai, malamalama ke kaupaona a me ka ductility, kevlar i ua hoʻomano hoʻohana i loko o nā kula. Keia mea i hiki ke pale loa-makahiki hopena a me nā wahie, ka mea, ua i ino.
Makahiki 1970-m palekana a me ka ike loea i ka loa ana Kevlar i ke kālepa? Iecaianoaaiiuo. Naʻe, i loko o ka hoʻomaka ia i papahana no ka mea kilo o ke kaʻa papale hainaka, i mea e hoomahuahua i ko lakou ikaika, a emi ke kaumaha. Ano, e hoomau ana i ka holomua me ka hana pono, a me ka ikaika puluniu optic a me ke keleawe uwea e ole ai i ko lakou rupture a me ka tensile i hui fabrics - e haawi ia'ku i ke kalai a me abrasive ololi. Ma kekahi, ua fabrics i i aiiay nenelu loa i loko o ka lole o ka 'âlapa a me koa mahiole a me Kevlar Loan. Poe koa o na aina i loko o ke ao nei i aponoia, a Kevlar, hoʻohana 'ana i kona ÿano waiwai, ua hoʻohana' Imi i koa lako a pan a me ka maluhia lawelawe. A Kuhina Nui mamuli o ka pono i pōkā maopopo vests.
All huahana i Kevlar i kiʻekiʻe wela ia'ku a me ka ia'ku i nāʻakika a me alkalis. Maikaʻi pāʻoihana i lole Loan me kevlar: i hoʻopōʻino manufacturing, a ua pili i nā uea o nāʻoki aniani a pahu metala, paʻa hui 'me kaʻulaʻula-wela mea (i ka 100 ° C), i loko o ka meaʻai hana, ma paʻi' enekinia, halihali o ke aniani a me na ia a pau o ia ha awina irreplaceable. Kevlar Loan pono ke hoʻololi e hoʻopale ai i ka lima, maiʻoki oiai, no kekahi laʻana, nui ana ka iʻa, nā manuʻaiʻia, ai, hua a me kaʻai iā. Ka mea, e Lightweight a me ka nohoʻana ma - i loko o ko lākou mau lima, "hanu",'ōlewa nui e mālama i ka pā lonoaʻili o na lima a me ka ae i ka hana me ka liʻiliʻi lāliʻi, e like me ka hoʻolako 'ana maikaʻi loaʻa - pulu (hamoia i) a me ka maloo. Mau Loan i ua hanaʻia me ka ulana, a ma kekahi nui like 'ole, no laila, kela kanaka keia kanaka ke kiʻi i ka mea e ola ai. Kevlar Loan hiki ke hoʻohana 'ole wale me he maʻamau Loan, akā, i like me ka naʻau, a me iiaie oaoieei. Ka mea, e i koi kūikawā. Holoi ka mea, hiki e me ka'ākilikai ma 40 ° C detergent, a me ka mea e maloʻo i mehana ea e pono ai. Oe ke lawe aku ia lakou a hiki i ka wahine holoi maloo ina oe makemake. Ma hope o hai hoʻohana a me ka holoi ana Loan (mittens) Kevlar noho ma kā lākou aiiay waiwai, shape a me ka nānā aku, a pela lākou lifespan Ua nui nui iho la ia.
Ua pono ai i loko o kekahi mau hana Kevlar ua hoʻohana 'ia i loko o haʻuki. Skiers, racers, mokokailala racers a me ka pôhili âlapa pôhili me pomaikai i hoʻohana Kevlar Loan. Lākou oolea, hopena ia'ku a me ka wela ia'ku ke emi ka helu o nā palapū paha e pale aku ia lakou.
Akā, Kevlar a me ka C. Brewer a pono e loaʻa kekahi mau keakea. I lawa ke kiekie Mahana O Ke Kai (430-480 ° C) ia decomposes, akā, ma ke ana wela i oi mamua o 150 ° C haalele i kona ikaika. Ka paio hahana maoli nō mämä a me ka lōʻihi like 'ole, o ka papa, pāʻani i ke kūlana. Penei, ma 70 hola o ka waiū a hiki i ka wela o ka ma kahi o 250 ° C kevlar Loan nalowale 50% o kona ikaika. At haʻahaʻa Mahana O Ke Kai (-190 ° C), ma ka mea ku ole, me ka ikaika a me ka elasticity e mālama. Akā, ma ka maʻamau o ke ola ka mea, aole e hiki i ka ho okumu i ka hoʻolilo 'ia e luku aku i ka hakakino' ole o Kevlar.