I-polypropylene iyancibilika ukukhiqizwa kwendwangu engalukiwe
Ncibilikisa indwangu engalukiwe ephephethiwe
Uhlolojikelele
Ukusetshenziswa okuhlukile noma amazinga amamaski okuzivikela nezingubo asebenzisa izinto ezihlukile nezindlela zokuzilungiselela, njengezinga eliphakeme kakhulu lamamaski okuvikela ezokwelapha (njenge-N95) nezingubo zokuzivikela, izendlalelo ezintathu kuya kwezinhlanu zenhlanganisela yendwangu engalukiwe, okuyinhlanganisela ye-SMS noma i-SMMMS.
Ingxenye ebaluleke kakhulu yale mishini yokuvikela ungqimba oluyisithiyo, okuyi-melt-blown non-woven layer M, ububanzi befiber of the layer buhle kakhulu, 2 ~ 3μm, idlala indima ebalulekile ekuvimbeleni ukungena kwamagciwane negazi. . Indwangu ye-microfiber ibonisa isihlungi esihle, ukungena komoya kanye ne-adsorbability, ngakho-ke isetshenziswa kabanzi ezintweni zokuhlunga, izinto ezishisayo, inhlanzeko yezokwelapha nezinye izinkambu.
I-polypropylene incibilika ubuchwepheshe bokukhiqiza indwangu engalukiwe nenqubo
Inqubo yokukhiqiza indwangu engalukiwe ephephethekayo ngokuvamile iwukuphakelwa kwe-polymer resin slice → ncibilikisa i-extrusion → ncibilikisa ukucwenga kokungcola → ukulinganisa okunembile kwephampu yemitha → umgogodla → anezikhala → ukusonga konqenqema → ukucutshungulwa komkhiqizo.
Umgomo wenqubo yokuncibilika kokuncibilika ukukhipha i-polymer encibilika embobeni ye-spinneret yekhanda le-die ukuze kwakhe ukugeleza okuncane kokuncibilika. Ngasikhathi sinye, ukugeleza komoya okunesivinini esikhulu kanye nokushisa okuphezulu ezinhlangothini zombili zezifutho zembobo yomgogodla futhi kwelula umfudlana oncibilikayo, obese ucwengwa ube imicu ngokucoleka okungu-1 ~ 5μm kuphela. Le micu ibe isidonselwa emicucini emifushane engaba ngu-45mm ngokugeleza okushisayo.
Ukuze uvimbele umoya oshisayo ukuthi ungaphephuleli i-fiber emfushane ngokuhlukana, idivayisi yokumunca i-vacuum iyasethwa (ngaphansi kwesikrini se-coagulation) ukuze iqoqe ngokulinganayo i-microfiber eyakhiwe ukwelula komoya oshisayo ngesivinini esiphezulu. Okokugcina, incike ekuzinamathiseleni ukuze yenze indwangu engalukiwe encibilikayo.
Amapharamitha enqubo eyinhloko:
Izakhiwo zezinto zokusetshenziswa kwe-polymer: kufaka phakathi izakhiwo ze-rheological zezinto zokusetshenziswa kwe-resin, okuqukethwe komlotha, ukusatshalaliswa kwenqwaba yamangqamuzana, njll. Phakathi kwazo, izakhiwo ze-rheological zezinto zokusetshenziswa ziyinkomba ebaluleke kakhulu, evame ukuvezwa nge-melting index (MFI). Uma i-MFI inkulu, kungcono ukuncibilika kwe-fluidity yezinto, futhi ngokuphambene nalokho. Lapho ukuncipha kwesisindo se-resin, i-MFI iphakama futhi i-viscosity ye-ncibilika iphansi, kufaneleka kakhulu inqubo yokuncibilika kokuncibilika nokungabhalwa kahle. Nge-polypropylene, i-MFI iyadingeka ukuthi ibe kububanzi obungu-400 ~ 1800g / 10mIN.
Enqubweni yokukhiqizwa kokuncibilika kokuncibilika, amapharamitha alungiswa ngokuya ngesidingo sezinto ezingavuthiwe nemikhiqizo ikakhulukazi afaka:
(1) Ncibilikisa inani le-extrusion lapho izinga lokushisa lingaguquki, inani le-extrusion liyakhuphuka, inani elincibilikayo elincibilikayo le-nonwoven liyakhuphuka, namandla ayakhuphuka (yehla ngemva kokufinyelela inani eliphakeme). Ubuhlobo bayo nobubanzi be-fiber buyakhula ngokulandelana, inani le-extrusion likhulu kakhulu, ububanzi be-fiber buyakhula, inombolo yezimpande iyancipha futhi amandla ayancipha, ingxenye yokubopha iyancipha, ibangele kanye nosilika, ngakho-ke amandla ahlobene endwangu engalukiwe ayancipha. .
(2) izinga lokushisa lendawo ngayinye yesikulufu alihlobene nje kuphela nokushelela kwenqubo yokuphotha, kodwa futhi lithinta ukubukeka, ukuzwa nokusebenza komkhiqizo. Izinga lokushisa liphezulu kakhulu, kuzoba khona "SHOT" block polymer, ukukhubazeka kwendwangu kwanda, ukwanda kwe-fiber ephukile, kubonakala "kundiza". Izinga lokushisa elingafanele Amasethingi angabangela ukuvinjelwa kwekhanda lokufafaza, aguge imbobo ye-spinneret, futhi alimaze idivayisi.
(3) Ukushisa komoya okunwebekayo Ukushisa komoya oshisayo okwelula ngokuvamile kuvezwa isivinini somoya oshisayo (ingcindezi), kunomthelela oqondile ebuhleni bomucu. Endabeni yeminye imingcele iyafana, khulisa isivinini somoya oshisayo, ukunciphisa i-fiber, ukwanda kwe-fiber node, amandla afanayo, ukwanda kwamandla, ukuzwa okungezona nokwelukiweyo kuba thambile futhi bushelelezi. Kodwa ijubane likhulu kakhulu, kulula ukubonakala "lindiza", lithinta ukubukeka kwendwangu engalukiwe; Ngokuncipha kwesivinini, i-porosity iyanda, ukumelana nokuhlunga kuyancipha, kodwa ukusebenza kahle kokuhlunga kuyawohloka. Kumele kuqashelwe ukuthi izinga lokushisa lomoya oshisayo kufanele libe eduze nezinga lokushisa elincibilikayo, ngaphandle kwalokho ukugeleza komoya kuzokwenziwa futhi ibhokisi lizolimala.
(4) Izinga lokushisa elincibilikayo Izinga lokushisa elincibilikayo, elaziwa nangokuthi izinga lokushisa lekhanda elincibilikayo, lihlobene eduze nokuncibilika kwamanzi. Ngokukhula kwezinga lokushisa, ukuncibilika kwe-fluidity kuba ngcono, i-viscosity iyancipha, i-fiber iba ngcono futhi ukufana kuba ngcono. Kodwa-ke, i-viscosity ephansi, i-viscosity engcono, ephansi kakhulu, izobangela ukuhlelwa ngokweqile, i-fiber kulula ukuphuka, ukwakheka kwe-microfiber ezindizayo emoyeni ayikwazi ukuqoqwa.
(5) Ibanga lokwamukela Ibanga lokwamukela (DCD) libhekisela ebangeni eliphakathi kwe-spinneret nekhethini lemeshi. Le parameter inethonya elibalulekile ikakhulukazi emandleni e-fiber mesh. Ngokukhula kwe-DCD, amandla nokuqina kokugoba kuncipha, ububanzi befiber buyancipha, futhi iphuzu lokubopha liyancipha. Ngakho-ke, indwangu engalukiwe ithambile futhi i-fluffy, ukuvuthwa kuyanda, futhi ukumelana nokuhlunga nokusebenza kahle kokuhlunga kuyancipha. Uma ibanga likhulu kakhulu, okusalungiswa kwefiber kuncishiswa ukugeleza komoya oshisayo, futhi ukugoqa kuzokwenzeka phakathi kwamafayili enkambweni yokubhala, okuholela kuma-filaments. Lapho ibanga elitholayo lincane kakhulu, i-fiber ayikwazi ukupholiswa ngokuphelele, okuholela kucingo, amandla endwangu engalukiwe ayancipha, i-brittleness iyanda.
