Aramid fiber, luv luv rau aromatic polyamide fibers, yog teev nyob rau hauv plaub qhov kev ua tau zoo fibers ua ntej rau kev loj hlob nyob rau hauv Tuam Tshoj, nrog rau carbon fiber, ultra-siab molecular hnyav polyethylene fiber (UHMWPE), thiab basalt fiber. Zoo li nylon zoo tib yam, aramid fiber ntau belongs rau tsev neeg ntawm polyamide fibers, nrog amide bonds nyob rau hauv lub ntsiab molecular saw. Qhov sib txawv tseem ceeb nyob hauv kev sib raug zoo: nylon's amide bonds txuas nrog aliphatic pawg, whereas aramid's yog conjugated nrog benzene rings. Cov qauv molecular tshwj xeeb no muab aramid fiber ntau lub zog axial siab (> 20cN / dtex) thiab modulus (> 500GPa), ua rau nws cov khoom nyiam rau kev txhawb nqa high-end cables.
Hom ntawm Aramid Fiber
Aramid fiber ntauFeem ntau suav nrog tag nrho cov aromatic polyamide fibers thiab heterocyclic aromatic polyamide fibers, uas tuaj yeem raug cais ntxiv rau hauv ortho-aramid, para-aramid (PPTA), thiab meta-aramid (PMTA). Ntawm cov no, meta-aramid thiab para-aramid yog cov uas tau raug kev lag luam. Los ntawm cov qauv molecular foundations, qhov sib txawv tseem ceeb ntawm ob qhov no yog nyob rau hauv txoj hauj lwm ntawm cov pa roj carbon atom nyob rau hauv lub nplhaib benzene uas cov amide daim ntawv cog lus txuas. Qhov sib txawv ntawm cov qauv no ua rau muaj kev sib txawv tseem ceeb hauv cov khoom siv kho tshuab thiab thermal stability.
Para-Aramid
Para-aramid, los yog poly (p-phenylene terephthalamide) (PPTA), tseem hu ua Aramid 1414, yog ib tug linear siab polymer nrog ntau tshaj 85% ntawm nws cov amide bonds ncaj qha mus rau aromatic rings. Cov khoom lag luam zoo tshaj plaws para-aramid yog DuPont's Kevlar® thiab Teijin's Twaron®, uas yog tus thawj tswj hwm lub ntiaj teb kev lag luam. Nws yog thawj fiber ntau uas tau tsim los siv cov kua crystalline polymer spinning tov, ushering nyob rau hauv ib tug tshiab era ntawm high-kev ua tau zoo hluavtaws fibers. Raws li cov khoom siv kho tshuab, nws lub zog tensile tuaj yeem ncav cuag 3.0-3.6 GPa, elastic modulus 70-170 GPa, thiab elongation ntawm tawg 2-4%. Cov yam ntxwv tshwj xeeb no muab nws qhov txiaj ntsig tsis zoo hauv kev kho qhov muag cable, kev tiv thaiv ballistic, thiab lwm yam.
Meta-Aramid
Meta-aramid, los yog poly (m-phenylene isophthalamide) (PMTA), tseem hu ua Aramid 1313, yog ib qho ua rau kub-resistant organic fiber. Nws cov qauv molecular muaj cov amide pawg txuas cov meta-phenylene rings, tsim ib zigzag linear saw stabilized los ntawm muaj zog intermolecular hydrogen bonds nyob rau hauv ib tug 3D network. Cov qauv no endows cov fiber ntau nrog cov nplaim hluav taws zoo heev, thermal stability, thiab hluav taws xob tsis kam. Ib yam khoom lag luam yog DuPont's Nomex®, nrog rau Limiting Oxygen Index (LOI) ntawm 28-32, iav hloov pauv kub ntawm li 275 ° C, thiab kev pabcuam kub ntxhov siab tshaj 200 ° C, ua rau nws siv dav hauv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob kub.
Cov khoom zoo ntawm Aramid Fiber
Aramid fiber muaj ultra-siab zog, siab modulus, tshav kub tsis kam, acid thiab alkali tsis kam, tsis tshua muaj hnyav, rwb thaiv tsev, kev laus tsis kam, lub neej ntev, kev ruaj ntseg tshuaj, tsis muaj molten droplets thaum combustion, thiab tsis muaj tshuaj lom emissions. Los ntawm daim ntawv thov cable kev xav, para-aramid outperforms meta-aramid nyob rau hauv thermal kuj, nrog ib tug tas mus li kev pab cuam kub ntawm -196 mus rau 204 ° C thiab tsis decomposition los yog melting ntawm 500 ° C. Para-aramid cov khoom tseem ceeb tshaj plaws muaj xws li ultra-siab zog, siab modulus, kub tsis kam, tshuaj tsis kam, thiab tsawg ntom. Nws lub zog ntau dua 25 g / dtex - 5 mus rau 6 npaug ntawm cov hlau zoo, 3 npaug ntawm fiberglass, thiab ob zaug ntawm cov xov paj muaj zog nylon. Nws cov qauv yog 2-3 npaug ntawm cov hlau lossis fiberglass thiab 10 npaug ntawm cov nylon muaj zog. Nws yog ob zaug nyuaj li steel hlau thiab hnyav li ntawm 1/5 ntau npaum li cas, ua rau nws tshwj xeeb tshaj yog haum rau kev siv los txhawb hauv optical cables, submarine cables, thiab lwm yam high-end cable hom.
Mechanical Properties ntawm Aramid Fiber
Meta-aramid yog ib qho yooj yim polymer nrog tawg lub zog siab dua li polyester, paj rwb, los yog nylon. Nws muaj qhov siab elongation tus nqi, mos tes xav, zoo spinnability, thiab tuaj yeem ua rau hauv luv fibers lossis filaments ntawm txawv denier. Nws tuaj yeem raug spun rau hauv cov ntaub thiab cov khoom siv tsis yog siv cov tshuab textile txheem thiab ua tiav kom tau raws li kev tiv thaiv khaub ncaws xav tau ntawm ntau yam lag luam. Nyob rau hauv hluav taws xob rwb thaiv tsev, meta-aramid cov nplaim-retardant thiab kub-resistant zog sawv tawm. Nrog rau LOI ntau dua 28, nws yuav tsis txuas ntxiv hlawv tom qab tawm hauv nplaim taws. Nws cov nplaim taws ua haujlwm yog qhov tseem ceeb rau nws cov qauv tshuaj, ua rau nws mus tas li nplaim hluav taws-tiv taus rau kev ua haujlwm poob vim kev ntxuav lossis siv mus ntev. Meta-aramid muaj thermal stability zoo, nrog rau kev siv tas li ntawm 205 ° C thiab ruaj khov ntawm lub zog txawm tias kub tshaj 205 ° C. Nws qhov decomposition kub yog siab, thiab nws tsis yaj los yog poob ntawm qhov kub thiab txias, tsuas yog pib carbonize saum 370 ° C. Cov khoom no ua rau nws zoo tagnrho rau kev rwb thaiv tsev thiab kev txhawb nqa hauv high-temperature lossis hluav taws-resistant cables.
Tshuaj Stability ntawm Aramid Fiber
Meta-aramid muaj kev tiv thaiv zoo rau feem ntau cov tshuaj thiab cov concentrated inorganic acids, txawm hais tias nws yog rhiab heev rau cov concentrated sulfuric thiab nitric acids. Nws kuj muaj alkali tsis kam ntawm chav tsev kub.
Radiation Resistance ntawm Aramid Fiber
Meta-aramid nthuav tawm tshwj xeeb hluav taws xob tiv thaiv. Piv txwv li, nyob rau lub sij hawm raug rau 1.2 × 10⁻² W / cm² ultraviolet lub teeb thiab 1.72 × 10⁸ rad gamma rays, nws lub zog tseem tsis hloov. Qhov zoo tshaj plaws hluav taws xob tiv thaiv no ua rau nws tshwj xeeb tshaj yog tsim rau cov cables siv nyob rau hauv nuclear fais fab chaw nres tsheb thiab spacecraft.
Durability ntawm Aramid Fiber
Meta-aramid kuj qhia tau zoo heev puas thiab tshuaj tiv thaiv. Tom qab 100 ntxuav, ntaub ua los ntawm domestically tsim meta-aramid khaws ntau dua 85% ntawm nws thawj lub zog tsim kua muag. Nyob rau hauv daim ntawv thov cable, qhov no durability kom lub sij hawm ntev mechanical thiab hluav taws xob kev ua tau zoo stability.
Kev siv ntawm Aramid Fiber
Aramid fiber ntau yog dav siv nyob rau hauv Tuam Tshoj lub aerospace, automotive, electromechanical, kev tsim kho, thiab kev ua si industries vim nws zoo heev mechanical zog, high-temperature kuj, thiab tshuaj stability. Nws raug suav hais tias yog cov khoom siv tseem ceeb rau kev txhim kho yav tom ntej ntawm kev ua haujlwm siab. Tshwj xeeb, aramid plays lub luag haujlwm tsis tuaj yeem hloov pauv hauv kev sib txuas lus kho qhov muag cables, fais fab cables, high-temperature-resistant cables, submarine cables, thiab tshwj xeeb cables.
Aerospace thiab Tub Rog Fields
Aramid Fiber nta Tsawg ntom ntom, lub zog siab, thiab zoo heev corrosion tsis kam. Nws yog dav siv nyob rau hauv cov yam ntxwv ntawm lub tsheb aerospace, xws li foob pob hluav taws lub cev muaj zog casings thiab broadband radome lug. Nws cov ntaub ntawv sib xyaw ua rau muaj kev cuam tshuam zoo heev thiab electromagnetic yoj transparency, txo cov dav hlau hnyav thiab txhim kho kev nyab xeeb. Nyob rau hauv kev tiv thaiv sector, aramid yog siv nyob rau hauv cov mos txwv vests, kaus mom hlau, thiab blast-resistant ntim, ua rau nws yog ib qho tseem ceeb rau cov tiam tom ntej ntawm lub teeb yuag tub rog tiv thaiv.
Kev tsim kho thiab kev thauj mus los
Hauv kev tsim kho kev lag luam, aramid fiber ntau yog siv rau kev txhim kho cov txheej txheem thiab choj cable vim nws lub teeb yuag, yooj, thiab corrosion kuj. Nws yog tshwj xeeb tshaj yog zoo nyob rau hauv reinforcing irregular qauv. Hauv kev thauj mus los, aramid yog siv rau hauv cov log tsheb qaum ntaub rau tsheb thiab dav hlau. Aramid-reinforced log tsheb muaj lub zog siab, puncture resistance, tshav kub tsis kam, thiab kev pab lub neej ntev, ua tau raws li qhov kev xav tau ntawm cov tsheb loj thiab dav hlau niaj hnub no.
Hluav taws xob, Electronics, thiab Cable Industry
Aramid fiber ntau muaj cov ntawv thov tshwj xeeb hauv cov khoom siv hluav taws xob, hluav taws xob, thiab xaim & cable tsim, tshwj xeeb tshaj yog nyob rau hauv cov chaw hauv qab no:
Tensile Cov Tswv Cuab hauv Optical Cables: Nrog lub zog tensile siab thiab modulus, aramid fiber ua tus tswv cuab tensile hauv kev sib txuas lus kho qhov muag cables, tiv thaiv muag muag fibers los ntawm deformation nyob rau hauv nro thiab kom ruaj khov teeb liab kis tau tus mob.
Kev txhawb zog hauv Cables: Hauv tshwj xeeb cables, submarine cables, fais fab cables, thiab high-temperature-resistant cables, aramid feem ntau yog siv los ua lub hauv paus txhawb zog los yog armor txheej. Piv nrog rau cov hlau reinforcements, aramid muaj lub zog zoo dua ntawm qhov hnyav dua, ua kom muaj zog tensile zog thiab txhua yam ruaj khov.
Rwb thaiv tsev thiab nplaim retardancy: Aramid composites muaj zoo heev dielectric thiab thermal stability. Lawv tau siv dav hauv cov kab hluav taws xob rwb thaiv tsev, cov tsho nplaim hluav taws, thiab halogen tsis muaj pa taws tsawg. Aramid ntawv, tom qab impregnated nrog insulating kua roj vanish, yog ua ke nrog ntuj mica siv nyob rau hauv high-temperature-resistant motors thiab transformers.
Hluav taws kub-Resistant thiab Rail Transit Cables: Aramid fiber ntau qhov hluav taws kub tiv thaiv thiab kev tiv thaiv tshav kub ua rau nws zoo tagnrho rau kev siv hauv nkoj nkoj, tsheb ciav hlau cables, thiab hluav taws xob hluav taws xob hluav taws xob hluav taws xob hluav taws xob, uas cov qauv kev nyab xeeb yog nruj.
EMC thiab Lightweighting: Aramid qhov zoo tshaj plaws electromagnetic transparency thiab tsis tshua muaj dielectric tas li ua rau nws haum rau EMI shielding khaubncaws sab nraud povtseg, radar radomes, thiab optoelectronic integration Cheebtsam, pab txhim kho electromagnetic compatibility thiab txo lub cev nyhav.
Lwm Daim Ntawv Thov
Vim nws cov ntsiab lus muaj ntxhiab tsw qab, aramid fiber ntau muaj cov tshuaj lom neeg ruaj khov thiab kev tiv thaiv corrosion, ua rau nws tsim nyog rau cov hlua marine, roj drilling cables, thiab cov khoom siv hluav taws xob xa hluav taws xob hauv qhov chaw hnyav. Nws kuj tseem siv dav hauv cov khoom siv ua kis las, tiv thaiv iav, thiab tsheb nres tsheb, thiab tau nce ntxiv los ua ib qho kev phooj ywg ib puag ncig rau asbestos hauv kev sib khi thiab rwb thaiv tsev daim ntaub ntawv, thermal rwb thaiv tsev panels, thiab lwm yam sealing Cheebtsam, kom ntseeg tau tias kev ua tau zoo thiab ib puag ncig kev nyab xeeb.
Post lub sij hawm: Lub Xya hli ntuj-31-2025