Tam sim no,yaj tshuab nonwoven ntaubyog siv dav hauv kev ua cov ntaub ntawv lim dej. Txij li xyoo 1970, ntau yam thev naus laus zis them thiab cov lim dej tshwj xeeb nrog cov nqi electrostatic los ntawm kev sib xyaw cov fibers sib txawv tau tsim thiab siv. Qhov tshwm sim tam sim ntawd yog txoj kev electrostatic electret tam sim no. Cov txheej txheem electret tseem ceeb tam sim no suav nrog electrostatic spinning, corona charging, friction electrification, thermal polarization thiab low energy electron beam bombardment. Vim yog cov txheej txheem electrostatic electret sib txawv (txheej txheem) ntawm cov ntaub ntawv, cov khoom ntawm electret lub cev tsim kuj txawv heev.
Qhov tseeb, qhov kev ua tau zoo ntawm cov ntaub meltblown nonwoven tsuas yog tsawg dua 70%, thiab nws tsis txaus los cia siab rau qhov cuam tshuam ntawm kev thaiv cov khoom siv ntawm peb-seem ntawm cov fibers ultrafine nrog cov fibers zoo, cov qhov me me thiab cov porosity siab. Txwv tsis pub, tsuas yog nce cov khoom siv gram hnyav tuab yuav ua rau muaj kev tiv thaiv kev lim dej ntau heev. Yog li ntawd, cov khoom siv lim dej feem ntau ntxiv cov nyhuv electrostatic rau cov ntaub melting spray los ntawm cov txheej txheem xaiv electrostatic. Qhov kev ua haujlwm lim dej tuaj yeem ncav cuag 99.9% txog 99.99% los ntawm kev siv txoj kev electrostatic.KN95 tus qauv.
Cov khoom siv lim cua Electret SIV lub polarity ntawm cov fiber nws tus kheej kom nqus cov hmoov av electrostatic thiab ntes cov kab mob thiab cov kab mob. Lub siab porosity thiab qhib electrostatic electret cov khoom ntawm ultrafine fibers yog siv los muab kev ua haujlwm siab thiab tsis tshua muaj kev lim dej zoo. Hauv cov tshuaj tua kab mob heev ntawm kev ua haujlwm yog electret yaj-blown daim ntaub txhawb nqa lub zog electrostatic teb thiab microelectronics ntws ntawm cov kab mob, ua rau nws cov protein thiab nucleic acid mutation puas tsuaj, rhuav tshem cov kab mob ntawm qhov chaw, tua cov kab mob, tso tawm cov ions tsis zoo tourmaline nws tus kheej thaiv qee cov kab mob microbial metabolic txheej txheem, suav nrog lub cev ua pa, cov haujlwm ntawm cov enzyme, pawg hloov pauv los ntawm phab ntsa cell, yog li inhibiting cov kab mob hlwb muaj cov nyhuv antibacterial.
Cov khoom siv lim dej melting - jet electret ntes cov khoom me me feem ntau los ntawm kev ua ob qho kev thaiv tshuab thiab electrostatic adsorption. Kev tiv thaiv tshuab muaj feem cuam tshuam nrog cov qauv thiab cov khoom ntawm cov khoom siv: thaum daim ntaub txau molten raug them los ntawm corona nrog lub zog ntawm ntau pua mus rau ntau kilovolts, cov fibers diffuse mus rau hauv lub network ntawm qhov vim yog electrostatic repulsion, thiab qhov loj ntawm cov fibers loj dua qhov loj ntawm cov hmoov av, yog li tsim cov qauv qhib. Thaum cov hmoov av hla dhau cov khoom siv lim dej molten, electrostatic effect tsis tsuas yog tuaj yeem nyiam cov hmoov av them tau zoo, tab sis kuj ntes cov khoom tsis muaj polarized los ntawm electrostatic induction effect. Qhov siab dua ntawm electrostatic peev xwm ntawm cov khoom siv, qhov siab dua qhov ceev ntawm cov khoom siv, qhov ntau dua qhov them, qhov muaj zog dua electrostatic effect. Corona discharge tuaj yeem txhim kho kev ua haujlwm lim ntawm polypropylene melting - spraying daim ntaub. Kev ntxiv cov khoom tourmaline tuaj yeem txhim kho qhov ua haujlwm electret, ua kom muaj kev ua haujlwm lim, txo qhov tsis kam lim, ua kom qhov ceev ntawm cov fiber, thiab txhim kho lub peev xwm cia ntawm cov fiber net. Qhov ua tiav zoo dua thaum ntxiv 6% tourmaline electret. Ntau dhau cov khoom siv electret yuav ua rau kom cov neeg nqa khoom txav mus los tsis ua haujlwm.
Saum toj no yog hais txog: dab tsi yog qhov kev qhia txog cov ntaub mos mos uas tsis yog woven, vam tias yuav muaj qee yam kev pab rau koj; Peb tsim khoomBEF99 yaj tshuab,lim dej yaj,Meltblown nonwoven Npuag rau lub ntsej muag lub ntsej muagTxais tos rau kev sab laj ~
Lub sijhawm tshaj tawm: Cuaj hlis-21-2020