Tam sim no,yaj-blown nonwovenCov ntaub siv dav hauv kev ua cov ntaub 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 cov txheej txheem electrostatic electret tam sim no. Tam sim no, cov txheej txheem electret feem ntau suav nrog electrostatic spinning, corona charging, friction electrification, thermal polarization, low-energy electron beam bombardment, pure water jet, thiab lwm yam. Vim muaj cov txheej txheem electrostatic electret sib txawv ntawm cov ntaub ntawv, cov khoom ntawm electret lub cev tsim kuj sib txawv heev, thiab muaj qhov sib txawv hauv kev txhim kho kev ua haujlwm lim dej thiab electrostatic persistence.
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 yaj thiab txau feem ntau ntxiv cov nyhuv electrostatic rau cov ntaub yaj thiab txau los ntawm cov txheej txheem electrostatic electoral-electrode, thiab siv txoj kev electrostatic los txhim kho kev ua haujlwm lim dej, uas tuaj yeem ncav cuag % txog%. Qhov ntawd yog kom ua tau raws li tus qauv KN95 lossis siab dua.
Cov khoom siv lim cua Electret SIV lub polarity ntawm cov fiber nws tus kheej los nqus cov hmoov av electrostatic thiab ntes cov kab mob thiab cov kab mob. Lub zog hluav taws xob ntawm lub electret ntawm polypropylene fused jet fiber txawv ntawm qhov ntawm txoj siv sib txhuam ntawm cov khoom siv ib txwm muaj. Nws tsis yog kev tshawb fawb los kos cov ntawv tawg los txiav txim seb cov tshuaj tsuag molten puas raug them lossis seb lub ntsej muag puas muaj kev ua haujlwm lim dej los ntawm kev sib txhuam hluav taws xob. Kev sib txhuam hluav taws xob yog qhov them ib ntus, yog qhov them ntawm qhov chaw yog qhov tshwm sim ib ntus. Kev sib txhuam yog qhov them polarized zoo thiab tsis zoo ntawm qhov chaw, thaum electret fiber them yog qhov them ntxiv sab hauv ntxiv los ntawm kev siv cov nqi hluav taws xob siab thaum lub sijhawm electret. Cov nqi no tau tawg ua rau hauv qhov porous sab hauv ntawm cov fiber ultrafine molten hauv daim ntawv ntawm electret master nanoparticles. Kev tiv thaiv dej ntawm cov khoom siv molten jet thiab qhov thaiv ntawm cov fiber ultrafine ua rau cov nqi no xauv ruaj khov hauv sab hauv. Thaum tsuas yog cov khoom me me nkag mus rau sab hauv ntawm cov txheej molten jet, qhov cuam tshuam electrostatic thiab cov qauv ntawm cov fiber ultrafine pib ua lub luag haujlwm.
Qhov hu ua hluav taws xob zoo li qub yog vim cov khoom siv polypropylene molten jet nws tus kheej yog insulating, kuj yog ib hom khoom siv electropoles, yog li ntawd tus nqi yuav tsis raug neutralized random, random dissipated. Lub zog siab ntxiv voltage discharge charge khaws cia rau hauv lub fiber ntev nrog lub zog hluav taws xob txaus. Ntxiv mus, nws yog qhov sib koom ua ke ntawm ntau tus nqi, tsis yog ib hom nqi tsim los ntawm kev sib txhuam. Yog li ntawd, macro adsorption tsis tuaj yeem qhia ncaj qha rau qhov kev ua tau zoo ntawm microscopic charge. Lub porosity siab thiab qhib electrostatic electret khoom ntawm ultrafine fibers yog siv los muab kev ua haujlwm siab thiab qis tsis kam lim zoo. Hauv cov tshuaj tua kab mob heev mechanism 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, kev ua haujlwm ntawm cov enzyme, loj hloov pauv los ntawm phab ntsa cell, yog li inhibiting cov kab mob cell muaj antibacterial nyhuv.
Peb yog ib tugchaw tsim khoom ntawm cov ntaub tsis-woven uas yaj tawm, txais tos los sab laj nrog peb ~
Lub sijhawm tshaj tawm: Lub Xya Hli-30-2020