Izinto eziyinhloko kumaski okuvimbela ubhubhane - i-polypropylene

Impahla eyinhloko yamaskipolypropylene non-nokwendwangu(eyaziwa nangokuthi indwangu engalukiwe), okuwumkhiqizo omncane noma ozwakala sengathi owenziwe ngemicu yendwangu ngokubopha, ukuhlanganisa, noma ezinye izindlela zamakhemikhali nezomshini. Amamaski okuhlinzwa ezokwelapha ngokuvamile enziwa ngezingqimba ezintathu zendwangu engalukiwe, okuyindwangu engalukiwe engu-spunbond engu-S, indwangu engalukiwe encibilikisiwe engu-M, nendwangu engalukiwe engu-spunbond engu-S, eyaziwa ngokuthi isakhiwo se-SMS; Ungqimba lwangaphakathi lwenziwe ngendwangu evamile engalukiwe, enesikhumba esinobungane nomphumela wokumunca umswakama; Isendlalelo sangaphandle senziwe ngendwangu engenamanzi engalukiwe, enomsebenzi wokuvimbela uketshezi futhi isetshenziselwa ikakhulukazi ukuvimba uketshezi olufuthwe ngumuntu ogqokile noma abanye; Isendlalelo sesihlungi esimaphakathi ngokuvamile senziwe ngendwangu engalukiwe ephephethwa yi-polypropylene eye yahlukaniswa ngokwe-electrostatically, engahluza amagciwane futhi ibambe iqhaza eliwujuqu ekuvimbeni nasekuhlungeni.

Ulayini wokukhiqiza imaski ozenzakalelayo uthuthukisa kakhulu ukusebenza kahle kokukhiqizwa kwemaski. Imiqulu emikhulu yendwangu engalukiwe ye-polypropylene isikwa ibe yimiqulu emincane futhi ibekwe emgqeni wokukhiqiza imaski. Umshini usetha i-engeli encane futhi kancane kancane unciphise futhi uwaqoqe kusukela kwesokunxele kuya kwesokudla. Indawo yemaski icindezelwa isicaba ngethebhulethi, futhi izinqubo ezinjengokusikwa, ukuvala onqenqemeni, nokucindezela ziyenziwa. Ngaphansi kokusebenza kwemishini ezenzakalelayo, kuthatha isilinganiso samasekhondi angaba ngu-0.5 kuphela ukuze umugqa wokuhlanganisa wasefekthri ukhiqize imaskhi. Ngemuva kokukhiqizwa, imaski ibulawa amagciwane nge-ethylene oxide futhi iyekwa ukuthi ihlale izinsuku eziyi-7 ngaphambi kokuvalwa, ukupakishwa, ukufakwa emabhokisini, futhi kuthunyelwe ukudayiswa.

Izinto eziyinhloko zamamaski - i-polypropylene fiber

Ungqimba lokuhlunga (ungqimba luka-M) oluphakathi komaski bezokwelapha luyindwangu yokuhlunga ephephethekayo encibilikayo, okuwungqimba olubalulekile oluwumgogodla, futhi impahla eyinhloko i-polypropylene melt blown material ekhethekile. Lokhu okuqukethwe kunezici zokugeleza okuphezulu kakhulu, ukuguquguquka okuphansi, nokusabalalisa kwesisindo samangqamuzana amancane. Isendlalelo sesihlungi esakhiwe sinezinto ezinamandla zokuhlunga, ezivikelayo, zokufakwa ngaphakathi, kanye nokumunca uwoyela, ezingahlangabezana namazinga ahlukahlukene enani lemicu endaweni yeyunithi ngayinye kanye nendawo engaphezulu yongqimba oluwumgogodla lwemaski yezokwelapha. Ithani elilodwa le-polypropylene fiber elincibilika kakhulu lingakhiqiza imaski yokuvikela yezokwelapha ecishe ibe ngu-250000 ye-polypropylene N95, noma imaski yokuhlinzwa eyi-900000 ukuya kweyisigidi esisodwa.

Isakhiwo se-polypropylene ephephethekayo sesihlungi siqukethe imicu eminingi enqamulayo enqwabelene ezindaweni ezingahleliwe, enobubanzi be-fiber emaphakathi obungu-1.5~3 μ m, cishe u-1/30 wobubanzi bezinwele zomuntu. Indlela yokuhlunga yezinto zokuhlunga ezincibilikayo ze-polypropylene ngokuyinhloko ihlanganisa izici ezimbili: isithiyo semishini kanye ne-electrostatic adsorption. Ngenxa yemicu ye-ultrafine, indawo enkulu ethize, i-porosity ephezulu, nosayizi omncane we-pore omaphakathi, izinto zokuhlunga ezincibilikayo ze-polypropylene zinezivimbi ezinhle zebhaktheriya kanye nemiphumela yokuhlunga. I-Polypropylene melt blown filter material inomsebenzi we-electrostatic adsorption ngemva kokwelashwa kwe-electrostatic.

Usayizi wenoveli coronavirus mncane kakhulu, cishe 100 nm (0.1 μ m), kodwa leli gciwane alikwazi ukuba khona ngokuzimela. Itholakala ikakhulukazi ekusithekeni kanye namaconsi lapho uthimula, futhi ubukhulu bamaconsi bungaba ngu-5 μ m. Uma igciwane eliqukethe amaconsi lisondela kwendwangu encibilikisiwe, azokhangiswa ngogesi phezulu, avimbele ukuthi lingangeni ungqimba oluphakathi nendawo oluminyene futhi lufinyelele umphumela wokuvimba. Ngenxa yokuthi igciwane kunzima kakhulu ukulikhipha ekuhlanzeni ngemva kokuba libanjwe imicu ye-electrostatic ye-ultrafine, futhi ukuwasha nakho kungalimaza ikhono lokumunca i-electrostatic, lolu hlobo lwemaski lungasetshenziswa kanye kuphela.

Ukuqonda i-Polypropylene Fiber

I-polypropylene fiber, eyaziwa nangokuthi i-PP fiber, ngokuvamile ibizwa ngokuthi i-polypropylene e-China. I-polypropylene fiber iyifayibha eyenziwe nge-polymerizing propylene njengento eluhlaza ukuze ihlanganise i-polypropylene, bese ingena uchungechunge lwezinqubo zokuphotha. Izinhlobo eziyinhloko ze-polypropylene zifaka i-polypropylene filament, i-polypropylene i-fiber emfushane, i-polypropylene split filament, i-polypropylene enwetshiwe i-filament (BCF), intambo yezimboni ye-polypropylene, indwangu engalukiwe ye-polypropylene, i-polypropylene cigarette tow, njll.

I-polypropylene fiber isetshenziselwa ikakhulukazi umata (isisekelo sikakhaphethi kanye ne-suede), izindwangu zokuhlobisa, izindwangu zefenisha, izintambo ezihlukahlukene zezintambo, amanetha okudoba, ukuzwa okumunca uwoyela, izinto zokuqinisa isakhiwo, izinto zokupakisha, nezindwangu zezimboni ezifana nendwangu yokuhlunga, indwangu yesikhwama, njll. I-Polypropylene ingasetshenziswa njengezihlungi zikagwayi, njll. Izintambo ze-polypropylene ultrafine zingasetshenziselwa ukukhiqiza izindwangu zezingubo eziphezulu; I-quilt eyenziwe nge-polypropylene hollow fibers ilula, ifudumele, futhi inokunwebeka okuhle.

Ukuthuthukiswa kwe-Polypropylene Fiber

I-Polypropylene fiber iyinhlobonhlobo yefayibha eyaqala ukukhiqizwa kwezimboni ngawo-1960. Ngo-1957, uNatta wase-Italy et al. okokuqala kwasungulwa i-isotactic polypropylene futhi kuzuzwe ukukhiqizwa kwezimboni. Ngokushesha ngemva kwalokho, inkampani yaseMontecatini yayisebenzisela ukukhiqiza imicu ye-polypropylene. Ngo-1958-1960, inkampani yasebenzisa i-polypropylene ekukhiqizeni i-fiber futhi yaqamba ngokuthi i-Meraklon. Kamuva, ukukhiqizwa nakho kwaqala e-United States naseCanada. Ngemuva kuka-1964, imicu yokuhlukanisa ifilimu ye-polypropylene ukuze ihlanganiswe yathuthukiswa futhi yenziwa imicu yendwangu kanye nezintambo zikakhaphethi ngokusebenzisa i-fibrillation yefilimu emincane.
Ngawo-1970, inqubo yokuphotha yebanga elifushane kanye nemishini yenza ngcono inqubo yokukhiqiza imicu ye-polypropylene. Ngesikhathi esifanayo, i-filament eqhubekayo eyandisiwe yaqala ukusetshenziswa embonini ye-carpet, futhi ukukhiqizwa kwe-polypropylene fiber kwathuthuka ngokushesha. Ngemuva kuka-1980, ukuthuthukiswa kwe-polypropylene kanye nobuchwepheshe obusha bokukhiqiza imicu ye-polypropylene, ikakhulukazi ukusungulwa kwama-catalysts e-metallocene, kwathuthukisa kakhulu izinga le-polypropylene resin. Ngenxa yokuthuthukiswa kwe-stereoregularity yayo (isotropy efika ku-99.5%), ikhwalithi yangaphakathi ye-polypropylene fibers iye yathuthukiswa kakhulu.
Maphakathi nawo-1980, imicu ye-polypropylene ultra-fine yathatha indawo yeminye imicu kakotini yezindwangu zendwangu kanye nezindwangu ezingalukiwe. Njengamanje, ucwaningo nokuthuthukiswa kwemicu ye-polypropylene nayo iyasebenza emazweni ahlukahlukene emhlabeni jikelele. Ukuthandwa nokuthuthukiswa kobuchwepheshe bokukhiqiza i-fiber ehlukene kuye kwandise kakhulu izinkambu zokufaka isicelo zemicu ye-polypropylene.

Isakhiwo semicu ye-polypropylene

I-Polypropylene iyi-molecule enkulu enama-athomu ekhabhoni njengeketango eliyinhloko. Ngokuya ngokuhlelwa kwendawo kwamaqembu ayo e-methyl, kunezinhlobo ezintathu zezakhiwo ezinezinhlangothi ezintathu: okungahleliwe, okungajwayelekile, kanye ne-meta ejwayelekile. Ama-athomu ekhabhoni ochungechungeni oluyinhloko lwamamolekyuli e-polypropylene asendizeni efanayo, futhi amaqembu awo e-methyl aseceleni angahlelwa ngamalungiselelo ahlukene wendawo ngaphakathi nangaphansi kwendiza eyiketango elikhulu.
Ukukhiqizwa kwemicu ye-polypropylene kusebenzisa i-isotactic polypropylene ene-isotropy engaphezu kuka-95%, ene-crystallinity ephezulu. Isakhiwo sawo siyiketango elivunguzayo elijwayelekile elinezinhlangothi ezintathu. Iketango eliyinhloko le-molecule lakhiwe ngamaketanga e-carbon athomu asontekile endizeni efanayo, futhi amaqembu e-methyl aseceleni asohlangothini olufanayo lwendiza yeketango eliyinhloko. Le crystallization ayiyona nje isakhiwo esivamile samaketanga ngamanye, kodwa futhi ine-chain stacking evamile endaweni efanele ye-axis chain. I-crystallinity ye-primary polypropylene fibers ingama-33% ~ 40%. Ngemuva kokwelula, i-crystallinity inyuka ibe ngu-37% ~ 48%. Ngemuva kokwelashwa okushisa, i-crystallinity ingafinyelela ku-65% ~ 75%.

Imicu ye-polypropylene ngokuvamile yenziwa ngendlela yokuncibilika kokuphotha. Ngokuvamile, izintambo zibushelelezi futhi ziqondile ohlangothini lwe-longitudinal, ngaphandle kwemivimbo, futhi zinesigaba esiphambano esiyindilinga. Zibuye ziphothwe zibe imicu engajwayelekile kanye nemicu eyinhlanganisela.

Izici zokusebenza zemicu ye-polypropylene

Ukuma komzimba

Isici esikhulu kunazo zonke se-polypropylene ukuthungwa kwayo okulula, okunokuminyana okungu-0.91g/cm ³, okulula kunamanzi futhi okungu-60% kuphela kwesisindo sikakotini. Iwuhlobo olulula kakhulu lokuminyana phakathi kwemicu yamakhemikhali ejwayelekile, i-20% ilula kunenayiloni, i-30% ilula kune-polyester, futhi i-40% ilula kune-viscose fiber. Kufanelekile ukwenza izingubo zezemidlalo zamanzi.

Izici ezingokomzimba

I-Polypropylene inamandla aphezulu kanye nokwephulwa kokuphuka okungama-20% -80%. Amandla ayancipha ngokunyuka kwezinga lokushisa, futhi i-polypropylene ine-modulus yokuqala ephezulu. Ikhono layo lokululama elinwebekayo lifana neyiloni 66 ne-polyester, futhi lingcono kune-acrylic. Ikakhulukazi, ikhono layo lokubuyisela ngokushesha elinwebekayo likhulu, ngakho-ke indwangu ye-polypropylene nayo imelana kakhulu nokugqoka. Indwangu ye-polypropylene ayijwayele ukushwabana, ngakho-ke ihlala isikhathi eside, usayizi wezingubo uzinzile, futhi awukhubazeki kalula.

Ukumuncwa komswakama nokusebenza kokudaya

Phakathi kwamafayibha okwenziwa, i-polypropylene inokumunca umswakama okubi kakhulu, cishe umswakama ocishe ube yiziro uphinde utholakale ngaphansi kwezimo ezijwayelekile zomkhathi. Ngakho-ke, amandla ayo omile namanzi kanye namandla okuphuka acishe alingane, okuyenza ifaneleke ngokukhethekile ukwenza amanetha okudoba, izintambo, indwangu yokuhlunga, kanye ne-gauze ebulala amagciwane emthini. I-polypropylene ithambekele ekubeni nogesi omile kanye nokugoqa ngesikhathi sokusetshenziswa, ngenani eliphansi lokushwabana. Indwangu kulula ukuyigeza futhi yome ngokushesha, futhi iqinile. Ngenxa yokumunca umswakama ompofu kanye nokugqwala lapho igqokwa, i-polypropylene ivame ukuhlanganiswa nemicu yokumunca umswakama ophezulu uma isetshenziswa ezindwangu zezingubo.
I-Polypropylene inesakhiwo esivamile se-macromolecular kanye ne-crystallinity ephezulu, kodwa ayinawo amaqembu asebenzayo angakwazi ukuhlanganisa ama-molecule odayi, okwenza ukudaya kube nzima. Odayi abavamile abakwazi ukuwufaka umbala. Ukusebenzisa odayi abahlakazekile ukudaya i-polypropylene kungabangela kuphela imibala ekhanyayo kanye nokushesha kombala okungekuhle. Ukuthuthukisa ukusebenza kokudaya kwe-polypropylene kungafinyelelwa ngezindlela ezifana ne-graft copolymerization, umbala wangempela woketshezi, nokuguqulwa kwenhlanganisela yensimbi.

Izakhiwo zamakhemikhali

I-Polypropylene inokumelana okuhle kakhulu namakhemikhali, ukuhlasela kwezinambuzane, kanye nesikhunta. Ukuzinza kwayo ngokumelene ne-asidi, i-alkali, namanye ama-agent amakhemikhali kuphakeme kuneminye imicu yokwenziwa. I-Polypropylene inokumelana kahle nokugqwala kwamakhemikhali, ngaphandle kwe-nitric acid egxilile kanye ne-caustic soda egxilile. Inokumelana okuhle ne-asidi ne-alkali, okwenza ifanelekele ukusetshenziswa njengento yokuhlunga futhiimpahla yokupakisha.Nokho, ukuzinza kwayo kuzincibilikisi zemvelo kubi kancane.

Ukumelana nokushisa

I-Polypropylene iyifayibha ye-thermoplastic enephuzu eliphansi lokuthambisa nendawo yokuncibilika kuneminye imicu. Izinga lokushisa lendawo yokuthambisa liphansi ngo-10-15 ℃ kunephuzu elincibilikayo, okuholela ekwehlulekeni kokumelana nokushisa. Ngesikhathi sokudaya, ukuqedwa, kanye nokusetshenziswa kwe-polypropylene, kuyadingeka ukunaka ukulawulwa kwezinga lokushisa ukuze ugweme ukuguquguquka kwepulasitiki. Uma ishiswa ezimeni ezomile (njengamazinga okushisa angaphezu kuka-130 ℃), i-polypropylene izoqhekeka ngenxa ye-oxidation. Ngakho-ke, i-anti-aging agent (i-heat stabilizer) ivame ukungezwa ekukhiqizeni i-polypropylene fiber ukuze kuthuthukiswe ukuzinza kwe-polypropylene fiber. Kodwa i-polypropylene inokumelana kangcono nomswakama nokushisa. Bilisa emanzini abilayo amahora ambalwa ngaphandle kokuguqulwa.

Okunye Ukusebenza

I-Polypropylene inokukhanya okungekuhle nesimo sezulu, ijwayele ukuguga, ayimelani noku-ayina, futhi kufanele igcinwe kude nokukhanya nokushisa. Kodwa-ke, impahla yokunqanda ukuguga ingathuthukiswa ngokungeza i-ejenti elwa nokuguga ngesikhathi sokuphotha. Ngaphezu kwalokho, i-polypropylene ine-insulation kagesi enhle, kodwa ijwayele ugesi omile ngesikhathi sokucubungula. I-Polypropylene akulula ukuyishisa. Lapho imicu ishwabana futhi inyibilika elangabini, ilangabi lingazicimela ngokwalo. Lapho kushiswa, kwakha ibhulokhi eliqinile elisobala elinephunga elincane le-asphalt.

I-Dongguan Liansheng Non woven Technology Co., Ltd.yasungulwa ngoMeyi 2020. Kuyibhizinisi elikhulu lokukhiqiza indwangu engalukiwe ehlanganisa ucwaningo nentuthuko, ukukhiqiza, nokudayiswa. Ingakwazi ukukhiqiza imibala ehlukahlukene ye-PP spunbond izindwangu ezingalukiwe ezinobubanzi obungaphansi kwamamitha angu-3.2 ukusuka ku-9 amagremu kuya ku-300 amagremu.