Cov laj thawj ntawm kev tshawb fawb txog cov khoom siv tom qab kev siv ntau hom khoom sib txawv yog dab tsi?lub ntsej muagNtxiv mus rau cov khoom siv tiv thaiv tus kheej (PPE), cov khoom siv polymer tshwj xeeb thiab cov txheej txheem tsim khoom twg koom nrog?
Cov ntaub npog qhov ncauj ua los ntawm cov khoom dab tsi?
Vim li cas thiaj muaj qhov sib txawv loj ntawm cov ntaub npog qhov ncauj sib txawv? Thaum kuv sau ntawv, kuv txiav lub ntaub npog qhov ncauj plaub txheej uas siv feem ntau hauv chav kuaj mob kom paub seb nws zoo li cas sab hauv:
Raws li peb pom, lub npog ntsej muag tau muab faib ua plaub txheej. Ob txheej sab nraud tshaj plaws yog ob daim ntaub zoo li cov ntaub, txheej dub yog cov pa roj carbon ua kom muaj zog, thiab lwm txheej yog ntom, uas zoo li daim ntaub so ntswg me ntsis. Ua me me tom qab saib qee cov ntaub ntawv kom nkag siab, ntxiv rau nruab nrab ntawm cov pa roj carbon ua kom muaj zog, peb txheej ntxiv yog ib hom khoom hu ua cov ntaub tsis-woven. Cov Ntaub Tsis-woven (lub npe lus Askiv: Cov Ntaub Tsis-woven lossis Cov Ntaub Tsis-woven) kuj tseem hu ua Cov Ntaub Tsis-woven, uas yog ua los ntawm cov xov hlau lossis cov xov hlau tsis sib xws. Nws hu ua ntaub vim nws qhov tsos thiab qee yam khoom.
Muaj ntau hom txheej txheem tsim khoom rau cov ntaub tsis-woven, suav nrog cov txheej txheem spunbonded, cov txheej txheem melting spray, cov txheej txheem kub dov, cov txheej txheem spuning thiab lwm yam. Cov fibers nyoos uas tuaj yeem siv tau yog polypropylene (PP) thiab polyester (PET). Tsis tas li ntawd, muaj nylon (PA), viscose fiber, acrylic fiber, polypropylene fiber (HDPE), PVC, thiab lwm yam.
Tam sim no, feem ntau cov ntaub tsis-woven yog tsim los ntawm txoj kev spunbonded hauv kev ua lag luam. Txoj kev no tsim cov filament txuas ntxiv los ntawm kev extruding thiab ncab cov polymer, tom qab ntawd cov filament raug muab tso rau hauv lub vas, thiab cov fiber net tom qab ntawd raug khi los ntawm nws tus kheej, thermal bonding, chemical bonding lossis mechanical reinforcement, yog li ntawd cov fiber net ua tsis-woven. Cov ntaub tsis-woven spunbonded yooj yim txheeb xyuas. Feem ntau, qhov dov ntawm cov ntaub tsis-woven spunbonded yog pob zeb diamond zoo li.
Lwm cov txheej txheem tsim khoom tsis-woven hu ua needling non-woven fabric. Lub hauv paus ntsiab lus ntawm kev tsim khoom yog rov ua dua lub fiber net nrog cov npoo thiab cov npoo ntawm seem peb sab (lossis lwm qhov). Thaum lub barb hla dhau lub network, nws yuam qhov chaw thiab txheej sab hauv ntawm lub network mus rau hauv lub network. Vim yog kev sib txhuam ntawm cov fibers, lub network fluffy thawj zaug raug nias. Thaum lub koob tawm ntawm lub net, cov strands raug tso tseg los ntawm cov barbs, yog li ntawd ntau cov strands ua entangled hauv lub net thiab tsis tuaj yeem rov qab mus rau lawv lub xeev fluffy thawj zaug. Tom qab ntau zaus ntawm needling, ntau cov fiber bundles raug punctured rau hauv lub fiber net, thiab cov fibers hauv lub net ua entangled nrog ib leeg, yog li tsim cov khoom siv needling nonwoven nrog qee lub zog thiab tuab.
Tab sis cov qhov hws ntawm ob daim ntaub tsis-woven loj dhau rau lub hom phiaj kho mob kom cais cov kab mob ntawm ib ncig ntawm 100 nm.
Yog li ntawd, txheej nruab nrab ntawm lub npog ntsej muag phais dav dav yog ua los ntawm cov ntaub tsis-woven los ntawm kev txau yaj. Kev tsim cov ntaub tsis-woven uas yaj-tshuaj tsuag yog thawj zaug muab cov polymer masterbatch (feem ntau polypropylene) rau hauv lub extruder thiab yaj nws hauv lub extruder ntawm qhov kub ntawm kwv yees li 240 ℃ (rau PP). Cov yaj dhau los ntawm lub twj tso kua mis thiab mus txog lub taub hau pwm txhaj tshuaj. Thaum cov polymer tshiab tsim los ntawm lub spinneret, qhov kawg ntawm cov cua compressed ACTS rau ntawm polymer thiab rub cov filament kub mus rau 1 ~ 10 m hauv txoj kab uas hla ntawm qhov ceev cua siab dua suab (550m / s). Raws li nws cov khoom siv lub cev, xws li lub vas hu ua microfiber net. Cov fibers ultrafine nrog cov capillarity tshwj xeeb nce tus lej thiab thaj chaw ntawm cov fibers ib chav tsev, yog li ua rau cov ntaub yaj-tshuaj tsuag muaj cov khoom lim zoo, tiv thaiv, rwb thaiv tsev thiab nqus roj. Nws tuaj yeem siv rau hauv huab cua, cov khoom siv lim kua, cov khoom siv cais tawm, cov khoom siv lub ntsej muag thiab lwm yam teb.
Lub tshuab lim dej ntawm lub npog ntsej muag kho mob yog Brownian diffusion, interception, inertial collision, gravity settlement thiab electrostatic adsorption. Plaub yam thawj zaug yog txhua yam khoom siv lub cev, uas yog cov yam ntxwv ntuj ntawm cov ntaub tsis-woven uas tsim los ntawm kev txau melting. Lub zog lim dej yog li 35%. Qhov no tsis yog raws li qhov yuav tsum tau ua ntawm lub npog ntsej muag kho mob. Peb yuav tsum ua kev kho mob tsis txav chaw ntawm cov khoom siv, ua kom cov fiber nqa hluav taws xob, thiab siv electrostatic los ntes cov aerosol uas tus kab mob Coronavirus tshiab nyob hauv.
Cov tshuaj aerosol tshiab Coronavirus (aerosol) raug ntes los ntawm kev nqus ntawm cov tshuaj coronavirus tshiab los ntawm lub zog coulomb ntawm cov fiber uas them. Lub hauv paus ntsiab lus yog ua kom qhov chaw ntawm cov khoom siv lim dej qhib dua, cov khoom me me tuaj yeem ntes tau muaj zog, thiab qhov ceev ntawm cov khoom nce ntxiv, qhov nqus ntawm cov khoom me me thiab cov nyhuv polarization muaj zog dua, yog li cov txheej lim dej ntawm cov khoom siv lim dej uas tsis yog ntaub, yuav tsum dhau los daws, tsis tuaj yeem hloov pauv raws li qhov ua pa tiv taus, ua tiav 95% kev lim dej, kom ua tau zoo tiv thaiv tus kab mob.
Tom qab qee qhov kev tshawb fawb, kuv muaj kev nkag siab dav dav txog cov khoom sib xyaw ntawm lub npog ntsej muag hauv kuv txhais tes: txheej sab nraud yog ua los ntawm cov ntaub tsis-woven uas tau xuas los ntawm PP, thiab cov txheej nruab nrab yog cov pa roj carbon ua kom muaj zog thiab cov ntaub PP yaj tshuaj tsuag txheej.
Lub sijhawm tshaj tawm: Lub Yim Hli-29-2020