Zophimba nkhopendi nsalu zosalukidwa, zomwe ndi nsalu zosalukidwa mosiyana ndi nsalu za nsalu, ndipo zimapangidwa ndi ulusi wolunjika kapena wosasinthika.
Zophimba nkhope zachipatala nthawi zambiri zimakhala ndi zigawo zambiri, zomwe nthawi zambiri zimatchedwa zomangamanga za SMS (zigawo ziwiri za S ndi 1 M). Pakadali pano, chiwerengero chachikulu cha zigawo ku China ndi 5, zomwe ndi SMMMS (zigawo ziwiri za S ndi zigawo zitatu za M).
Kodi SMS ndi chiyani?
Apa, S ikuyimira Spunbond layer. M'mimba mwake mwa ulusi ndi wokhuthala pang'ono, pafupifupi ma microns 20 (m). Ntchito yayikulu ya ma layer awiri a S Spunbond ndikuthandiza kapangidwe ka nsalu yonse yosalukidwa, yomwe siili ndi mphamvu yaikulu pa chotchinga. Gawo lofunika kwambiri la chigoba ndi chotchinga kapena Meltblown layer M (Meltblown layer). M'mimba mwake mwa chotsukira chosungunula ndi chopyapyala pang'ono, pafupifupi ma microns awiri (M), kotero ndi gawo limodzi mwa magawo khumi okha a m'mimba mwake mwa chotchinga chosungunula, chomwe chimagwira ntchito yofunika kwambiri poletsa mabakiteriya ndi kulowa kwa magazi.
Zophimba nkhope zachipatala nthawi zambiri zimagwiritsa ntchito nsalu yopopera yosungunuka yolemera magalamu 20, zophimba nkhope za chikho cha N95 zimagwiritsa ntchito nsalu yopopera yosungunuka yolemera magalamu 40 kapena kuposerapo.
Malinga ndi ziwerengero za bungwe la China Industrial Textile Industry Association, pofika kumapeto kwa chaka cha 2018, pali mizere 1,477 yopangira ma spunbonded, 65 yochulukirapo kuposa chaka chatha, ndi kuwonjezeka kwa chaka ndi chaka kwa 4.6%, pakati pa izi, mzere wopanga ma spunbonded non-wovens wa PP wawonjezeka ndi 3.38%, mzere wopanga ma SMS composite ndi pafupifupi 13%, ndi mzere wopanga ma PET spunbonded non-wovens ndi 9.32%. Chiwerengero cha makampani omwe amapanga matani opitilira 50,000 pachaka chinawonjezekanso kuchokera mu 2017. Makampani opanga ma spunbonded akufulumizitsa chitukuko chawo kuti akwaniritse zosowa za msika zokweza zinthu ndi kukweza ukadaulo.
Kuyambira mu 2018, mabizinesi ambiri am'nyumba apanga zinthu zawo kuti zikhale zopepuka, zopyapyala komanso zapamwamba, ndipo apeza zotsatira zabwino. SSMMS spunbonded/melten shotcreting composite process 600m/min kapena kupitirira liwiro lalikulu; Pafupifupi magalamu 10 pa mita imodzi ya sikweya zinthu zofewa kwambiri zopepuka komanso zokhazikika zikupitilirabe kuonekera.
Kodi nsalu yosalukidwa ya SMS imachokera kuti?
Nsalu zosalukidwa ndi SMSAmapangidwa makamaka ndi polypropylene PP (yokhala ndi mphamvu zachilengedwe za bacteriostatic komanso hydrophobicity), ndipo kukula kwa ulusi kumatha kufika ma microns 0.5-10. Ulusi wopyapyala kwambiriwu wokhala ndi capillarity yapadera umawonjezera kuchuluka ndi malo a ulusi pa unit department, motero zimapangitsa nsalu zosungunuka kukhala ndi mphamvu zabwino zosefera mpweya, zomwe zimapangitsa kuti zikhale chigoba chabwino.
Pakadali pano, pali njira zitatu zazikulu zopangira zinthu za SMS (nsalu yosalukidwa ndi SMS): "njira imodzi", "njira ziwiri" ndi "njira imodzi ndi theka".
Mbali imodzi ndi kugwiritsa ntchito gawo la zipangizo zopangira pa ndondomekoyi, pogwiritsa ntchito ukadaulo wopota, wosungunuka, wozungulira mwachindunji zinthu zopangira pambuyo posungunuka mu ukonde, bola ngati pali njira yolinganiza bwino njira zosiyanasiyana zopangira makina opota, ndipo zinthuzo zimatha kupanga kapangidwe kosiyana, nsalu iliyonse yopangidwa ndi laminated composite, nthawi zambiri imakhala ndi chophatikiza chotentha cha mphero kukhala nsalu. "Njira imodzi" imadziwika ndi kusungunuka mwachindunji mu ukonde, momwe makina aliwonse opota amatha kusinthidwa paokha, njira yopangira yowongolera mwamphamvu, thanzi labwino, kuthamanga kwambiri, kusintha kuchuluka kwa ukonde uliwonse wa ulusi, kupanga zinthu zamtundu wa SMS zamitundu yosiyanasiyana, ndiye ukadaulo waukulu masiku ano.
Njira ya magawo awiri: Pogwiritsa ntchito njira ya magawo awiri popanga zinthu za SMS, zinthu zomalizidwa za nsalu yophwanyidwa ndi nsalu yosungunuka zimatsegulidwa motsatira dongosolo linalake, kenako zimayikidwa motsatizana, kenako zimaphatikizidwa ndi mphero yotentha, ndikusakanikirana kukhala zinthu za SMS. Njira ya magawo awiriyi imadziwika ndi zida zosavuta komanso mtengo wotsika. Ndipotu, njira ya "magawo awiri" ndi ukadaulo wophatikizana womwe umagwiritsidwa ntchito kwambiri, komanso ukhoza kukhala wophatikizana ndi zinthu zina, ndi zinthu zina zosiyanasiyana, komanso ndi njira zosiyanasiyana, monga ultrasound, chomatira chosungunuka chotentha, zigawo zitatu za zipangizo pamodzi.
Njira imodzi ndi theka: mu njira ya magawo awiri, n'zothekanso kusintha nsalu yopopera yosungunuka ndi ukonde wosungunuka wa ulusi wopopera womwe umapangidwa m'munda, motero kumachokera njira yophatikiza yotchedwa "njira imodzi ndi theka". Nsalu yopopera imagwiritsidwa ntchito ngati gawo la pansi ndi gawo la pamwamba ndi zida ziwiri zomasuka, ndipo ukonde wopopera wa ulusi wosungunuka wa gawo lapakati umapotozedwa mwachindunji mu ukonde ndi makina opopera osungunuka, ndikuyikidwa pansi pa nsalu yopopera, kenako ndikuphimba ndi gawo lapamwamba la nsalu yopopera, ndi bwino kugwiritsa ntchito mphero yotentha yolumikizidwa kukhala zinthu za SMS.
Nthawi yotumizira: Sep-14-2020