Kodi mungasinthire bwanji kusefa kwa nsalu yosungunuka?

Monga maziko a masks azachipatala, kusefera kwa nsalu yosungunuka kumakhudza mwachindunji chitetezo cha masks. Pali zinthu zambiri zomwe zimakhudza kusefera kwa nsalu zosungunuka, monga kachulukidwe ka fiber line, kapangidwe ka fiber mesh, makulidwe, ndi kachulukidwe.

Komabe, mongazinthu zosefera mpweyakwa masks, ngati zinthuzo zili zolimba kwambiri, ma pores ndi ochepa kwambiri, ndipo kukana kupuma kumakhala kwakukulu, wogwiritsa ntchito sangathe kupuma bwino mpweya, ndipo chigoba chimataya mtengo wake.

Izi zimafuna kuti zinthu zosefera zisamangowonjezera kusefera bwino, komanso kuchepetsa kukana kwake kupuma momwe kungathekere, komanso kukana kupuma komanso kusefera moyenera ndizomwe zimatsutsana. Njira yothandizira ma electrostatic polarization ndiyo njira yabwino yothetsera kusagwirizana pakati pa kukana kupuma komanso kusefera bwino.

Makina osefa a nsalu yosungunuka

Mu makina osewerera a zosefera zowombedwa, njira zodziwika bwino zimaphatikizira kufalikira kwa Brownian, kulowera, kugunda kwa inertial, kukhazikika kwa mphamvu yokoka, ndi ma electrostatic adsorption. Chifukwa chakuti mfundo zinayi zoyamba ndizo zotchinga zamakina, makina osefera a nsalu zosungunuka amatha kufotokozedwa mwachidule ngati zotchinga zamakina ndi kutsatsa kwamagetsi.

Zotchinga zamakina

Avereji ya fiber diameter yapolypropylene meltblown nsalundi 2-5 μ m, ndi madontho okhala ndi kukula kwa tinthu kwakukulu kuposa 5 μ m mumlengalenga akhoza kutsekedwa ndi nsalu yosungunuka.

Pamene makulidwe a fumbi labwino ndi losakwana 3 μ m, ulusi munsalu yosungunuka imasanjidwa mwachisawawa ndikuphatikizana kuti apange wosanjikiza wopindika wa fiber fiber. Pamene particles kudutsa mitundu yosiyanasiyana ya njira zokhotakhota kapena njira, bwino fumbi ndi adsorbed pa CHIKWANGWANI pamwamba ndi makina kusefera van der Waals mphamvu.

Pamene kukula kwa tinthu ndi kuthamanga kwa mpweya kuli kwakukulu, kutuluka kwa mpweya kumayandikira zinthu zosefera ndipo kumalepheretsa, kuchititsa kuti ziziyenda mozungulira, pamene tinthu tating'onoting'ono timachoka pamtsinje chifukwa cha inertia ndikuwombana mwachindunji ndi ulusi, kugwidwa.

Pamene tinthu kukula yaing'ono ndi otaya mlingo otsika, ndi particles diffuse chifukwa Brownian kuyenda ndi kugunda ndi ulusi kuti anagwidwa.

Electrostatic adsorption

Electrostatic adsorption imatanthawuza kugwidwa kwa tinthu tating'ono ndi mphamvu ya Coulomb ya ulusi woyipitsidwa (polarizations) pomwe ulusi wa zinthu zosefera waperekedwa. Pamene fumbi, mabakiteriya, mavairasi ndi tinthu ting'onoting'ono kudutsa zinthu fyuluta, electrostatic mphamvu osati mogwira kukopa particles mlandu, komanso anagwira anachititsa polarized ndale particles kudzera electrostatic kupatsidwa ulemu kwenikweni. Pamene mphamvu ya electrostatic ikuwonjezeka, mphamvu ya electrostatic adsorption imakhala yamphamvu.

Chiyambi cha Njira ya Electrostatic Electrification

Chifukwa cha kusefedwa kwa nsalu zosalukidwa zomwe zimasungunuka ndi zosakwana 70%, kudalira mphamvu yotchinga yamakina amitundu itatu ya ulusi wokhala ndi ulusi wabwino, ma voids ang'onoang'ono, komanso porosity yayikulu yopangidwa ndi ulusi wa ultrafine sikokwanira. Choncho, meltblown kusefera zinthu zambiri kuwonjezera zotsatira electrostatic mlandu kwa nsalu meltblown kudzera electrostatic polarization luso, ntchito njira electrostatic kusintha dzuwa kusefera, kupangitsa kuti tikwaniritse 99,9% mpaka 99.99% kusefera dzuwa. Chosanjikiza chochepa kwambiri chikhoza kukwaniritsa miyezo yoyembekezeka, ndipo kukana kupuma kumakhala kochepa.

Pakalipano, njira zazikuluzikulu za electrostatic polarization ndi monga electrospinning, corona discharge, friction induced polarization, thermal polarization, ndi bombardment yotsika mphamvu ya ma elekitironi. Mwa iwo, kutulutsa kwa corona pakadali pano ndiye njira yabwino kwambiri ya electrostatic polarization.

Njira yotulutsa korona ndi njira yolipiritsa zinthu zosungunuka kudzera mu seti imodzi kapena zingapo za maelekitirodi ooneka ngati singano (voltage nthawi zambiri 5-10KV) ya jenereta ya electrostatic musanazungulire ma meltblown fiber mesh. Mphamvu yamagetsi ikagwiritsidwa ntchito, mpweya womwe uli pansi pa singano umatulutsa ionization ya corona, zomwe zimapangitsa kuti pakhale kutulutsa kwapanyumba. Zonyamulira zimayikidwa pamwamba pa nsalu yosungunuka pansi pa ntchito ya magetsi, ndipo zonyamulira zina zimagwidwa ndi misampha ya tinthu tating'onoting'ono ta amayi omwe ali pansi pamtunda, ndikupanga nsalu yosungunuka kukhala fyuluta ya thupi loyima.

Kuchulukitsa kuchuluka kwa pamwamba pa nsalu yosungunuka imatha kupezeka kudzera mu njira yotulutsira ma corona pochiza ma electrostatic discharge, koma pofuna kupewa kuwonongeka kwa chosungirako cha electrostatic ichi, kapangidwe kake ndi kapangidwe kazinthu zama elekitirodi zomwe zimasungunuka zimayenera kukhala zolimbikitsa kusungitsa. Njira yopititsira patsogolo mphamvu yosungiramo zinthu za electret imatha kutheka pobweretsa zowonjezera zomwe zili ndi katundu wosungira ndalama kuti apange misampha yolipira komanso zolipiritsa.

Choncho, poyerekeza ndi wamba Sungunulani kuwomberedwa mizere kupanga, kupanga Sungunulani zidawomberedwa kuti kusefera mpweya amafuna Kuwonjezera mkulu-voltage electrostatic kumaliseche zipangizo mu mzere kupanga, ndi Kuwonjezera wa polar masterbatch monga tourmaline particles kupanga yaiwisi polypropylene (PP).

Zinthu zazikulu zomwe zimakhudza zotsatira za chithandizo cha electrospinning pa nsalu zosungunuka

1. Kulipiritsa: nthawi yolipirira, mtunda wothamangitsa, voteji yamagetsi;

2. Makulidwe;

3. Zida zamagetsi.

Dongguan Liansheng Non Woven Technology Co., Ltd.idakhazikitsidwa mu Meyi 2020. Ndi bizinesi yayikulu yopanda nsalu yopanga nsalu kuphatikiza kafukufuku ndi chitukuko, kupanga, ndi malonda. Itha kupanga mitundu yosiyanasiyana ya nsalu za PP spunbond zosalukidwa ndi m'lifupi mwake osakwana 3.2 metres kuchokera ku 9 magalamu mpaka 300 magalamu.