I-Polypropylene inyibilika imveliso yelaphu elingalukiweyo elivuthelweyo
Nyibilikisa ilaphu elingaphothiweyo
Isishwankathelo
Ukusetyenziswa okwahlukeneyo okanye amanqanaba eemaski ezikhuselayo kunye nempahla yokunxiba zisebenzisa izixhobo ezahlukeneyo kunye neendlela zokulungiselela, njengelona nqanaba liphezulu leemaski zokhuselo lwezonyango (ezifana ne-N95) kunye nempahla ekhuselayo, iileya ezintathu ukuya kwezintlanu zokuhlanganiswa kwelaphu elingalukwanga, oko kukuthi iSMS okanye iSMMMS indibaniselwano.
Eyona nxalenye ibalulekileyo yezi zixhobo zokhuselo ngumaleko osithintelo, oko kukuthi, inyibilika-engalukiweyo umaleko we-M, i-fiber diameter yomaleko ilungile, i-2 ~ 3μm, idlala indima ebalulekileyo ekuthinteleni ukungena kwebhaktheriya kunye negazi. . Ilaphu le-microfiber libonisa isihluzo esilungileyo, ukunyanzeliswa komoya kunye nokubhengezwa, ngoko ke isetyenziswa kakhulu kwizinto zokucoca, izinto ezishushu, ucoceko lwezonyango kunye nezinye iinkalo.
I-polypropylene inyibilika iteknoloji yokuvelisa ilaphu elingalukiweyo kunye nenkqubo
Inkqubo yokuvelisa ilaphu elingalukwanga elivuthelweyo lidla ngokuba sisilayi sepolymer yeresin → nyibilika extrusion → nyibilika ukuhluzwa kokungcola → impompo yokulinganisa ngokuchanekileyo → ispinathi → umnatha → umphetho wokujija → ukusetyenzwa kwemveliso.
Umgaqo wenkqubo yokuvuthela inyibilika kukukhupha i-polymer enyibilikayo kumngxunya we-spinneret yentloko yokufa ukwenza umqukuqelo obhityileyo wokunyibilika. Kwangaxeshanye, isantya esiphezulu kunye nobushushu obuphezulu ukuhamba komoya kumacala omabini e-spinet hole izitshizi kwaye yolule umjelo onyibilikayo, othi ke ucocwe ube yimicu ngokucolwa kwe-1 ~ 5μm kuphela. Le micu iye itsalwe kwimicu emifutshane emalunga ne-45mm ngokuhamba kwe-thermal.
Ukuze kuthintelwe umoya oshushu ekuvutheleni ifayibha emfutshane ngokwahlukeneyo, isixhobo sokufunxa ivacuum sisetiwe (phantsi kwesikrini se-coagulation) ukuqokelela ngokulinganayo i-microfiber eyenziwe yi-high-speed hot air stretching. Okokugqibela, ixhomekeke ekuzincamatheleni ukwenza ilaphu elingalukwanga elinyibilikayo.
Iiparamitha zenkqubo engundoqo:
Properties of polymer ekrwada: kubandakanywa iimpawu rheological of resin izinto ekrwada, umxholo uthuthu, isalamane molecular mass distribution, etc. Phakathi kwabo, iimpawu rheological izinto ekrwada yeyona isalathiso ibalulekileyo, edla ngokuchazwa ukunyibilika index (MFI). Inkulu i-MFI, ingcono ukunyibilika kwezinto eziphathekayo, kwaye ngokuphambene noko. Ukunciphisa ubunzima bemolekyuli yezinto ze-resin, iphezulu i-MFI kwaye isezantsi i-viscosity enyibilikayo, ifaneleke ngakumbi inkqubo yokunyibilika kokunyibilika ngokuyilwa okungalunganga. Kwi-polypropylene, i-MFI iyadingeka ukuba ibe kuluhlu lwe-400 ~ 1800g / 10mIN.
Kwinkqubo yokuvelisa ukunyibilika kokunyibilika, iiparamitha ezihlengahlengisiweyo ngokwemfuno yemathiriyeli ekrwada kunye neemveliso ikakhulu ziquka:
(1) Nyibilika ubungakanani be-extrusion xa iqondo lobushushu lingaguquguquki, ubungakanani be-extrusion buyanda, ubuninzi be-melt obuvuthelwe buyanda, kwaye amandla ayanda (ayancipha emva kokufikelela kwixabiso eliphezulu). Ubudlelwane bayo kunye nedayamitha yefayibha yonyuka ngomgca, inani le-extrusion lininzi kakhulu, i-fiber diameter iyanda, inani leengcambu liyehla kwaye amandla ayancipha, inxalenye ye-bonding iyancipha, ibangela kunye nesilika, ngoko ke amandla ahlobene nelaphu elingalukwanga ayancipha. .
(2) ubushushu bendawo nganye yesikrufu abuhambelani kuphela nokuguda kwenkqubo yokusonta, kodwa kuchaphazela inkangeleko, imvakalelo kunye nokusebenza kwemveliso. Iqondo lokushisa liphezulu kakhulu, kuya kubakho "i-SHOT" ye-polymer block, iziphene zelaphu zanda, ukunyuka kwefayibha ephukileyo, kubonakala "kubhabha". Ubushushu obungafanelekanga Useto lunokubangela ukuvaleka kwentloko yesitshizi, iguge umngxuma we-spinneret, kwaye yonakalise isixhobo.
(3) Ubushushu bomoya oshushu Wolula Ubushushu bomoya oshushu ngokuqhelekileyo bubonakaliswa ngesantya somoya oshushu (uxinzelelo), kunempembelelo ethe ngqo kukulunga kosinga. Kwimeko yezinye iiparamitha ziyafana, yonyusa isantya somoya oshushu, ukucolwa kwefiber, ukonyuka kwefiber node, amandla afanayo, ukonyuka kwamandla, ukuziva okungalukwanga kuyathambile kwaye kugudileyo. Kodwa isantya sikhulu kakhulu, kulula ukubonakala "sibhabha", sichaphazela ukubonakala kwelaphu elingalukwanga; Ngokuhla kwesantya, i-porosity iyanda, ukuxhathisa kokucoca kuyancipha, kodwa ukusebenza kakuhle kokucoca kuyawohloka. Kufuneka kuqatshelwe ukuba ukushisa komoya oshushu kufuneka kusondele kwiqondo lokushisa lokunyibilika, ngaphandle koko ukuhamba komoya kuya kuveliswa kwaye ibhokisi iya konakaliswa.
4 Ngokunyuka kweqondo lokushisa, ukunyibilika kwe-melt kuba ngcono, i-viscosity iyancipha, i-fiber iba ngcono kwaye ukufana kuya kuba ngcono. Nangona kunjalo, i-viscosity ephantsi, ingcono, i-viscosity ephantsi kakhulu, iya kubangela ukuyila ngokugqithiseleyo, i-fiber kulula ukuphuka, ukubunjwa kwe-ultra-short microfiber ebhabha emoyeni ayinakuqokelelwa.
(5) Ukufumana umgama Ukufumana umgama (DCD) kubhekiselele kumgama phakathi kwespinneret kunye nomnatha womkhusane. Le parameter inefuthe elibalulekileyo ngokukodwa kumandla e-fiber mesh. Ngokunyuka kwe-DCD, amandla kunye nokuqina kokugoba kuncipha, i-fiber diameter iyancipha, kwaye indawo yokudibanisa iyancipha. Ke ngoko, ilaphu elingalukwanga lithambile kwaye lithambile, ukunyanzeliswa kuyanda, kunye nokumelana nokucoca kunye nokusebenza kakuhle kokucoca. Xa umgama ukhulu kakhulu, idrafti yefiber iyancitshiswa ngokuhamba komoya oshushu, kwaye ukudibanisa kuya kwenzeka phakathi kweefayili kwinkqubo yokuqulunqa, okubangelwa yi-filaments. Xa umgama ofumanayo umncinci kakhulu, ifayibha ayinakupholiswa ngokupheleleyo, okukhokelela kucingo, amandla elaphu elingalukwanga ayancipha, ubuqhophololo buyanda.
