Sezvinhu zvepakati zvemasiki ekurapa, kusefa kwejira rakanyunguduka kunobata zvakananga kudzivirira kwemasiki. Pane zvinhu zvakawanda zvinokanganisa kusefa kwemachira akanyunguduka, senge fiber line density, fiber mesh chimiro, ukobvu, uye density.
Zvisinei, semuair filtration materialnokuda kwemasikisi, kana zvinhu zvakanyanyisa, ma pores ari maduku, uye kupikisa kufema kwakanyanya, mushandisi haakwanisi kufema mweya, uye mask inorasikirwa nekukosha kwayo.
Izvi zvinoda iyo sefa zvinhu kwete chete kunatsiridza kusefa kwayo kushanda zvakanaka, asi zvakare kuderedza kufema kwayo kuramba zvakanyanya sezvinobvira, uye kuramba kufema uye kusefa kwakanaka iviri inopokana. Iyo electrostatic polarization kurapwa maitiro ndiyo yakanakisa nzira yekugadzirisa kupokana pakati pekufema kuramba uye kusefa kunyatsoita.
Iyo filtration mechanism yejira rakanyungudika
Mukuita kusefa kwezvinonyungudutswa zvinofefeta zvinhu, nzira dzinowanzo zivikanwa dzinosanganisira kupararira kweBrownian, kupindira, kudhumhana kweinertial, kugadzika kwegiravhiti, uye electrostatic adsorption. Nekuda kwekuti mana ekutanga misimboti zvese zvipingamupinyi zvemuchina, iyo yekusefa yemachira akanyunguduka inogona kungopfupikiswa semakiniki zvipingamupinyi uye electrostatic adsorption.
Mechanical chipingamupinyi
Avhareji faibha dhayamita yepolypropylene meltblown fabriciri 2-5 μ m, uye madonhwe ane particle size yakakura kudarika 5 μ m mumhepo inogona kuvharwa nemucheka wakanyunguduka.
Kana iyo dhayamita yeguruva rakatsetseka iri isingasviki 3 μ m, mafiibhi ari mumucheka wakanyunguduka anorongwa zvisina tsarukano uye anopindirana kuti aumbe multi curved chiteshi fiber sefa layer. Kana zvimedu zvichipfuura nemhando dzakasiyana dzematanho akakomberedzwa kana nzira, guruva rakatsetseka rinoshambadzirwa pamusoro pefiber pamusoro neiyo mechaniki yekusefa van der Waals simba.
Kana iyo particle size uye airflow velocity zviri zviviri zvakakura, mhepo inoyerera inosvika kune iyo sefa zvinhu uye inovharika, zvichiita kuti iyerere ichitenderedza, nepo zvimedu zvichibva pakuyerera nekuda kweinertia uye kudhumhana zvakananga nemafiber, achitorwa.
Kana saizi yechikamu idiki uye mwero wekuyerera wakadzikira, zvimedu zvinopararira nekuda kweBrownian kufamba uye kudhumhana nemafiibhi anotorwa.
Electrostatic adsorption
Electrostatic adsorption inoreva kutorwa kwezvimedu neCoulomb simba remafayibha akachajiswa (polarizations) kana mafiber eiyo sefa zvinhu achichajwa. Kana guruva, mabhakitiriya, mavhairasi uye zvimwe zvimedu zvichipfuura nepasefa zvinhu, simba remagetsi haringogone kukwezva zvimedu zvinochaja, asi zvakare kubata induced polarized neutral particles kuburikidza ne electrostatic induction effect. Sezvo simba remagetsi rinowedzera, iyo electrostatic adsorption effect inova yakasimba.
Nhanganyaya yeElectrostatic Electrification process
Nekuda kwekuita kusefa kwemachira akajairwa akanyunguduka asina kurukwa ari pasi pe70%, kungovimba chete nemuchina chivhariso mhedzisiro yematatu-dimensional aggregates emafiber ane mafibers akanaka, madiki voids, uye yakakwirira porosity inogadzirwa ne meltblown ultrafine fiber haina kukwana. Naizvozvo, meltblown sefa zvinhu zvinowanzo wedzera electrostatic kuchaja machaji kumucheka wakanyunguduka kuburikidza neelectrostatic polarization tekinoroji, uchishandisa nzira dzemagetsi kuvandudza kunaka kwekusefa, zvichiita kuti zvikwanise kuwana 99.9% kusvika 99.99% yekusefeta zvakanaka. Iro rakatetepa kwazvo rinogona kusangana nezvinodiwa zvinotarisirwa, uye kupikisa kwekufema zvakare kwakaderera.
Parizvino, nzira huru dze electrostatic polarization dzinosanganisira electrospinning, corona discharge, friction induced polarization, thermal polarization, uye low-energy electron beam bombardment. Pakati pavo, corona discharge parizvino ndiyo yakanakisa electrostatic polarization nzira.
Corona discharge method inzira yekuchaja zvinhu zvakanyunguduka kuburikidza neseti imwe chete kana anopfuura emagetsi akaita tsono (voltage kazhinji 5-10KV) yejenareta remagetsi risati ramonya meltblown fiber mesh. Kana yakakwira voltage yaiswa, mhepo iri pazasi petsono tipi inoburitsa corona ionization, zvichikonzera kuparara kwenzvimbo. Vatakuri vanoiswa pamusoro pemucheka wakanyunguduka pasi pechiito chemunda wemagetsi, uye vamwe vatakuri vanobatwa nemisungo yezvimedu zveamai vakamira zvakadzika mukati mepamusoro, zvichiita kuti jira rakanyunguduka rive sefa zvinhu zvemuviri wakamira.
Kuwedzera kuchajiswa kwepamusoro kwejira rakanyungudutswa rinogona kuwanikwa kuburikidza neiyo corona discharge nzira ye electrostatic discharge kurapwa, asi kuitira kudzivirira kuora kweiyi electrostatic chengetedzo, kuumbwa uye chimiro chemeltblown electrode zvinhu zvinofanirwa kuve zvakanakira kubhadharisa kuchengetwa. Iyo nzira yekuvandudza iyo yekuchaja yekuchengetera huwandu hwemagetsi emagetsi inogona kuwanikwa nekuunza ekuwedzera ane evhavha yekuchengetera zvivakwa kugadzira misungo yekuchaja uye machaji ekutora.
Naizvozvo, kana zvichienzaniswa neyakajairwa yakanyunguduka yakavhuvhuta mitsara yekugadzira, kugadzirwa kwezvinhu zvakanyungudutswa zvekufefeta kwemhepo kunoda kuwedzerwa kwe-high-voltage electrostatic discharge zvishandiso mumutsara wekugadzira, uye nekuwedzera kwepolar masterbatch senge tourmaline zvimedu kune kugadzirwa raw material polypropylene (PP).
Zvinhu zvikuru zvinokanganisa mhedzisiro ye electrospinning kurapwa pamachira akanyungudika
1. Mamiriro ekuchaja: nguva yekuchaja, chinhambwe chekuchaja, voltage yekuchaja;
2. Hukobvu;
3. Zvigadzirwa zvemagetsi.
Dongguan Liansheng Non woven Technology Co., Ltd.yakavambwa muna Chivabvu 2020. Ibhizimusi rekugadzira jira rakakura risingarukwe rinobatanidza tsvakiridzo nekusimudzira, kugadzira, uye kutengesa. Inogona kuburitsa mavara akasiyana-siyana ePP spunbond machira asiri akarukwa ane hupamhi husingasviki 3.2 metres kubva pa9 gramu kusvika 300 magiramu.
Nguva yekutumira: Oct-26-2024