Ib qho ntawm plaub qhov kev ua tau zoo fiber ntau: aramid staple fiber
Aramid fiber yog hu ua "alicyclic polyamide fiber", uas yog ib hom tshiab ntawm cov thev naus laus zis tshiab uas tib neeg tsim fiber ntau.
Ib yam li cov paj rwb zoo tib yam yog cov tshuaj fluorobenzene fibers, thiab cov roj carbon chains ntawm biomacromolecules muaj amide bonds. Lub nplhaib sib ntsib.
Hom ntawm Aramid
Aramid staple fiber ntau cov tuam txhab ntseeg tias aramid staple aramid fiber ntau suav nrog ob hom puv-alicyclic polyamide fiber ntau thiab heterocyclic compound alicyclic polyamide fiber, uas tuaj yeem muab faib ua ortho-aramid fiber, para-aramid fiber (PPTA) thiab inter-txoj hauj lwm aramid fiber. . Muaj peb hom para-aramid fiber ntau (PMTA), ntawm cov khoom uas paub txog niaj hnub no feem ntau suav nrog ob hom poly-aramid fiber ntau thiab para-aramid fiber ntau. Ntawm lawv, qhov sib txawv tseem ceeb ntawm ob hom aramid fibers yog qhov sib txuas ntawm amide daim ntawv cog lus thiab C molecule ntawm lub nplhaib benzene txawv.
✪ Pair aramid fiber ntau
Para-aramid fiber, aramid staple fiber yog polyparaphenylene terephthalamide (PPTA) chemical fiber, uas yog hu ua aramid fiber 1414 hauv kuv lub tebchaws, thiab ntau dua 85 feem pua ntawm cov amide bonds hauv cov qauv molecular saw tau ncaj qha rau A linear polymer ntawm lub nplhaib nplhaib. Nws yog lub ntiaj teb thawj cov tshuaj fiber ntau ua los ntawm cov khoom siv polymer lcd npo spinning tov, qhib lub sijhawm tshiab ntawm cov neeg ua haujlwm siab fibers.
✪ Meta-aramid fiber ntau
Meta-aramid fiber ntau, uas yog, polyisophthalyl-m-xylylenediamide (PMTA) chemical fiber, tseem hu ua aramid fiber hauv kuv lub tebchaws. 1313 Meta-aramid fiber ntau yog cov organic tshuaj lom neeg kub-resistant tshuaj fiber ntau. Cov tshuaj fiber ntau molecular qauv yog tsim los ntawm fluorobenzene functional pawg interconnected nrog meta-phenyl pawg, thiab cov qauv molecular saw yog linear thiab zigzag. Vim tias muaj zog hydrogen bonding ntawm cov qauv molecular, cov tshuaj fiber ntau muaj cov nplaim hluav taws zoo, tiv taus tshav kub, tiv thaiv hluav taws xob thiab lwm yam khoom.
Kev ua tau zoo ntawm aramid fiber ntau
Nws muaj cov khoom zoo heev xws li lub zog siab compressive, siab toughness thiab kub tsis kam, acid thiab alkali tsis kam, lub teeb yuag, rwb thaiv tsev txheej, kev laus tsis kam, lub neej ntev, ruaj khov qauv, tsis muaj molten droplets thaum ignited, thiab tsis muaj tshuaj lom roj. .
Qhov kub tsis kam ntawm para-aramid fiber ntau yog siab dua li ntawm meta-aramid fiber ntau. Cov ntawv thov txuas mus ntxiv yog -196 degree rau 204 degree, thiab nws yuav tsis yaj lossis yaj ntawm qhov kub ntawm 560 degree. Cov yam ntxwv pom tseeb tshaj plaws ntawm para-aramid fiber ntau yog siab compressive zog, siab toughness thiab kub tsis kam, acid thiab alkali tsis kam, lub teeb yuag thiab lwm yam khoom zoo. Nws hardness tshaj 25 grams ib denier, uas yog 5 npaug ntawm high-zoo stainless hlau daim hlau. ~ 6 npaug ntawm cov iav fiber ntau, 3 npaug ntawm cov khoom siv polyester muaj zog ntau lawm; tus nqi strain yog 2-3 npaug ntawm cov khoom zoo stainless hlau phaj lossis iav fiber ntau, thiab 10 npaug ntawm cov xov paj polyester muaj zog ntau lawm. Lub elasticity yog ob zaug ntawm cov hlau hlau, thiab qhov hnyav tsuas yog li 1/5 ntawm cov hlau tsis muaj hlau. Nws muaj cov nplaim hluav taws zoo heev thiab kev laus ua haujlwm, thiab muaj lub neej ntev.
✪ Cov khoom siv zoo heev thiab cov khoom siv ntawm aramid fiber ntau
Meta-aramid fiber ntau yog ib yam ntawm cov khoom siv mos polymer. Nws elongation ntawm kev tawg yog ntau tshaj li cov ntaub polyester zoo tib yam, paj rwb, polyester, thiab lwm yam. Nws muaj qhov loj elongation, mos kov, thiab zoo spinnability. Nws tuaj yeem ua tiav rau hauv qhov sib txawv deniers thiab ntev. High-quality polyester staple fibers thiab polyester yarns yog tsim rau hauv cov xov paj sib txawv suav nrog cov khoom siv textile zoo tib yam rau cov ntaub npuag thiab cov ntaub tsis-woven. Tom qab ua tiav, lawv ua tau raws li cov kev cai ntawm cov khaub ncaws tiv thaiv hauv kev lag luam sib txawv.
✪ Cov nplaim retardancy zoo heev thiab kub tsis kam ntawm aramid fiber ntau
Qhov kawg nplaim retardancy (LOI) ntawm meta-aramid fiber ntau tshaj 28, yog li nws tsis yooj yim rau re-ignite thaum nws tawm ntawm cov nplaim taws. Cov nplaim hluav taws kub nyhiab ntawm Newstar® meta-aramid fiber ntau yog txiav txim siab los ntawm nws tus kheej cov qauv tshuaj, yog li nws yog cov nplaim hluav taws kub nyhiab, uas tsis yooj yim los txo lossis poob cov nplaim hluav taws xob vim siv sij hawm thiab tu zaus. Newstar® meta-aramid fiber ntau muaj cov cua sov zoo, tuaj yeem siv tsis tu ncua ntawm tus qauv ntawm 205 degree, thiab tseem tuaj yeem tuav lub zog super ntawm qhov kub siab tshaj 205 degree. Newstar® meta-aramid fiber ntau muaj qhov kub melting kub, thiab nws tsis yooj yim rau yaj thiab drip nyob rau hauv qhov kub thiab txias, thiab nws pib carbonize thaum lub ambient kub tshaj 370 degree.
✪Aramid fibers muaj lub cev ruaj khov
Meta-aramid fibers muaj kev tiv thaiv zoo rau feem ntau cov tshuaj, tuaj yeem tiv taus cov oxidants muaj zog nrog cov concentrations siab, thiab muaj cov alkali tsis kam ntawm chav tsev kub.
✪ Radiation kuj ntawm aramid fiber ntau
Cov hluav taws xob tiv thaiv ntawm meta-aramid fibers yog qhov zoo heev. Piv txwv li, nyob rau hauv lub sij hawm ntev illumination ntawm 1.2 × 10-2w/in2 ultraviolet lub teeb thiab 1.72 × 108rads gamma hluav taws xob, nws hardness tseem tsis hloov.
✪ Aramid rau durability
Meta-aramid fiber ntau muaj kev ua haujlwm zoo heev thiab tshuaj lom neeg ua haujlwm. Tom qab 100 zaug ntawm kev ntxuav, lub zog tearing ntawm cov ntaub ua tiav nrog Newstar® meta-aramid fiber ntau tseem tuaj yeem ncav cuag 85 feem pua ntawm lub zog qub. saum toj no.
Qhov tseem ceeb ntawm kev siv aramid fiber ntau
Nws yog dav siv nyob rau hauv ntau industries xws li Tuam Tshoj lub aerospace, tsheb, electromechanical engineering, engineering siv, kev ua kis las kab lis kev cai, thiab lwm yam., thiab yog ib tug indispensable raw khoom nyob rau hauv lub neej yav tom ntej.
✪ Kev lag luam dav hlau
Aramid fiber ntau muaj qhov ntom ntom, siab zog, thiab zoo corrosion kuj. Nws tuaj yeem siv los tsim cov ramjet plhaub rau cov foob pob ua ntxaij nkoj, nrog rau cov khoom siv dav dav-yoj xa mus rau airfields, tag nrho cov fuselages ntawm qhov chaw shuttles, lub ntsiab tis, thiab tail fins. Ib tug tswv cuab uas dais cuam tshuam lub zog. Aramid fiber prepreg yog tsim los ntawm pre-impregnating aramid daim ntaub nrog epoxy resin kua nplaum, thiab ncaj qha sib txuas nrog honeycomb los yog ua npuas ncauj qauv los ua ib tug ob-txheej honeycomb qauv board, uas muaj zog hnav tsis kam thiab wireless Wave passability thiab lwm yam khoom. Lub super-hybrid composite multi-txheej board tsim los ntawm laminating aramid fiber nrog nyias aluminium alloy board thiab epoxy resin non-weft daim ntaub muaj ib tug siab tshwj xeeb tus nqi thiab lub zog tshwj xeeb, thiab kev pab cuam lub neej ntawm qaug zog nyem yog 100 npaug ntawm txhuas board. . Lub sij hawm mus txog 1000 zaug, tuaj yeem siv rau hauv tag nrho cov fuselage ntawm lub tshav dav hlau thiab lwm txoj haujlwm. Cov epoxy resin-raws li txhim kho cov khoom sib xyaw ua los ntawm aramid fiber ntau yog siv rau hauv lub cev tseem ceeb ntawm lub tshav dav hlau, uas tuaj yeem txo qhov hnyav tag nrho ntawm tshav dav hlau.
✪ Kev tiv thaiv kev lag luam
Nrog rau txoj kev loj hlob ntawm cov tub rog tshiab riam phom thiab khoom siv xws li organic chemistry thiab nuclear, muaj ntau cov kev cai tshiab ntawm kev ua tub rog tiv thaiv khaub ncaws: ruaj, hnav, EXO, nplaim taws retardancy thiab zoo ib puag ncig zoo adaptability thiab zais thiab lwm yam. armor thiab mos txwv kaus mom hlau ua los ntawm aramid tuaj yeem hloov cov qub polyester camisole thiab tank kaus mom hlau. Ntxiv rau qhov tsim nyog ntawm aramid fiber ntau rau lub cev armor thiab lub kaus mom tsis tuaj yeem ua rau nws me me thiab lub teeb hauv qhov hnyav, tab sis kuj nce EXO efficiency los ntawm 40 feem pua. Cov mos mos lub cev armor ua los ntawm high-end EXO aramid fiber ntau non-weft ntaub thiab high-kev ua tau zoo polyethylene zaj duab xis muaj zog EXO kev ua tau zoo thiab kub tsis kam tshaj polyethylene fiber ntau nrog cov txheeb ze molecular hnyav. Aramid kuj tuaj yeem sib xyaw nrog lwm cov ntaub ntawv (xws li hlau, ceramics, thiab lwm yam) ua kom muaj ntau yam muaj zog, cuam tshuam-resistant explosion-proof tso tsheb hlau luam, bulletproof shields thiab EXO armor plates, thiab lwm yam. Tsis tas li ntawd, cov ntaub aramid. yog sib koom ua ke rau cov kab noj hniav sab hauv ntawm cov qauv, uas tuaj yeem nqus tau cov blast yoj thiab zam kev puas tsuaj ntawm lub caij nplooj ntoos hlav rau lub cev.
✪ Kev lag luam thiab kev tsim kho
Lub plasticity ntawm aramid ntaub yog zoo dua li ntawm cov ntaub ntawv carbon fiber. Aramid staple fiber raw cov ntaub ntawv yog lub teeb hauv qhov hnyav thiab hloov tau yooj yim hauv kev ua si. Vim nws qhov yooj yooj yim, tsis txhob puag ncig lub ces kaum thaum cov qauv yog ntxiv dag zog. Weaving aramid fibers rau hauv steel tuav tuaj yeem siv los ua cov pob zeb ua kom muaj zog rau cov tsev loj. Ntxiv nrog rau qhov zoo ntawm lub zog siab thiab lub teeb yuag, nws kuj yog corrosion-resistant, thiab tib lub sij hawm muaj qhov zoo los tiv thaiv kev txiav.
✪ Kev lag luam kev thauj mus los
Vim tias aramid fiber muaj qhov tsis tshua muaj zog tsawg, siab thiab qis dua cov roj hmab, nws tuaj yeem siv tau raws li cov log tsheb lossis cov tshav dav hlau. Lub log tsheb ua los ntawm aramid fiber yog lub teeb hauv qhov hnyav, nyias hauv lub log, tsis tshua muaj kev sib txhuam tsis sib haum, siab hauv cov log tsheb muaj peev xwm, zoo hnav tsis kam, laser txiav tsis kam thiab puncture tsis kam, thiab lub log yog grounded thaum lub sij hawm tag nrho cov txheej txheem ntawm daim ntawv thov me me. Kev txav ntawm qhov nruab nrab ntawm lub ntiajteb txawj nqus nyob rau hauv siab, kev ua haujlwm zoo, kev ua haujlwm zoo, yooj yim rau dissipate tshav kub, tsis yooj yim rau deform, txhim kho lub caij kev nplij siab ntawm lub tsheb, ncua kev pab cuam lub neej ntawm lub log tsheb, thiab ua tau raws li cov kev cai ntawm niaj hnub dav hlau aircraft rau tsheb log tsheb. .
✪ Kev lag luam khoom siv hluav taws xob
Aramid fiber ntau muaj hardness thiab strain npaum li cas thiab tsawg hluav taws xob polarization Performance index, thiab xov tooj cua yoj transmittance yog zoo. Nyob rau hauv tib yam dabtsi yog khoov nruj, lub radar nrhiav tau wireless kav hlau txais xov tiv thaiv npog ua los ntawm aramid fiber ntau cov khoom yog nyias dua li iav fiber ntau cov khoom. Cov khoom tuaj yeem raug txo los ntawm 30 feem pua, thiab cov xov tooj cua nthwv dej tuaj yeem nce ntxiv los ntawm 10 feem pua; Lub thermal expansion coefficient ntawm laminated steel phaj ua los ntawm aramid fiber ntau thiab epoxy resin, phenolic resin, polyacrylonitrile thiab lwm yam epoxy resins yog ntau tshaj nrog cov plooj (porcelain siab), nws yog tsis yooj yim sua kom tawg nyob rau hauv lub thermal expansion thiab contraction, thiab tuaj yeem siv los ua cov ntawv luam tawm tshwj xeeb hauv cov khoom siv hluav taws xob saum npoo av, uas yog qhov zoo rau kev ua tau zoo thiab lub teeb yuag ntawm cov khoom siv hluav taws xob.
Siv aramid fiber ntau lub zog compressive thiab kub tsis kam, nws yog siv los ua "kev txhawb nqa prefabricated tivthaiv" hauv cov khoom siv kho qhov muag, uas tuaj yeem tiv thaiv qhov muag muag thiab rhiab fiber ntau ntawm stretching thiab deformation thaum nws raug tensile quab yuam, thiab tsis yooj yim. cuam tshuam lub teeb. xa. Cov khoom sib xyaw ntawm aramid fiber ntau thiab carbon fiber muaj cov txheej txheem zoo heev, cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob, thiab feem ntau yog siv los ua cov khoom siv los txo cov electrostatic teb hauv cov khoom siv hluav taws xob siab. Tom qab daim ntawv aramid yog pre-impregnated nrog peb-pov thawj xim, nws muaj kev ua tau zoo rwb thaiv tsev, thiab nws yog ua ke nrog ntuj mica raws li rwb thaiv tsev txheej khoom ntawm kub-resistant lub cev muaj zog.
✪ Lwm yam kev lag luam
Cov qauv molecular ntawm aramid fiber ntau muaj ntau benzene rings, nws muaj tshuaj zoo stability, corrosion kuj, siab tshwj xeeb zog, lub teeb thiab ntev, thiab yuav siv tau los tsim nylon ropes rau seagoing cov hlab ntsha thiab cov dej tob. Siv aramid fiber ntau thaum tshav kub kub tsis kam, qaug zog tiv thaiv thiab lwm yam khoom siv los ua cov rooj ntaus pob tesniv qib siab, cov pas nuv ntses, sleds, snowboards, skating ncej, crossbows, kayaks, golf khoom, thiab lwm yam, thiab tseem tuaj yeem siv los ua kom muaj kev nyab xeeb rau khau khau , boxing hnab looj tes, kev sib tw kaus mom hlau, lub cev ntaus pob ncaws pob, thiab lwm yam nrog cov qauv kev ua kis las nruj. Vim tias asbestos ua rau muaj kev hem thawj rau tib neeg txoj kev ua pa, aramid fiber ntau tuaj yeem siv los hloov cov asbestos los ua hydraulic seals xws li txhim kho sealing gasket daim hlau, uas yog siv rau gaskets thiab linings ntawm lub tsheb nres tsheb.
