Izinto eziphambili zeemaski ziilaphu le-polypropylene elingalukwanga(ekwaziwa njengelaphu elingalukwanga), elibhityileyo okanye elivakala njengemveliso eyenziwe ngemisonto yelaphu ngokudityaniswa, ukudibanisa, okanye ezinye iindlela zekhemikhali kunye nezomatshini. Iimaski zotyando lwezonyango ziqhele ukwenziwa ngokwemigangatho emithathu yelaphu elingalukwanga, elilaphu le-spunbond elingalukwanga S, ilaphu elingalukwanga elinyibilikayo elingu-M, kunye ne-spunbond engalukwanga ilaphu elingu-S, elaziwa ngokuba yi-SMS; Uluhlu lwangaphakathi lwenziwe ngelaphu eliqhelekileyo elingalukwanga, elinobungane besikhumba kunye nefuthe lokufunxa ukufuma; Umaleko wangaphandle wenziwe ngelaphu elingangenwa ngamanzi elingalukwanga, elinomsebenzi wokuthintela ulwelo kwaye lisetyenziswa ikakhulu ukuvala ulwelo olutshizwe ngumntu onxibileyo okanye abanye; Umaleko wesihluzi esiphakathi udla ngokwenziwa ngelaphu eline-polypropylene elinyibilikayo elivuthelweyo elingalukwanga elenziwe i-electrostatically polarized, enokucoca iintsholongwane kwaye idlale indima eqinisekileyo ekuthinteleni nasekuhluzeni.
Umgca wokuvelisa imaski ozenzekelayo uphucula kakhulu ukusebenza kwemveliso yeemaski. Imiqulu emikhulu ye-polypropylene yelaphu engalukiweyo inqunyulwa ibe yimiqulu encinci kwaye ibekwe kumgca wokuvelisa imaski. Umatshini ubeka i-engile encinci kwaye ucuthe ngokuthe ngcembe kwaye uwaqokelele ukusuka ekhohlo ukuya ekunene. Umphezulu wemaski ucinezelwe ukuba ucwecwe ngethebhulethi, kwaye iinkqubo ezinje ngokusika, ukutywinwa komphetho kunye nokucinezela ziyenziwa. Phantsi kokusebenza koomatshini abazisebenzelayo, kuthatha umyinge wemizuzwana eyi-0.5 kuphela kumgca wokudityaniswa kwefektri ukuvelisa imaski. Emva kwemveliso, iimaski zibulawa iintsholongwane nge-ethylene oxide kwaye ziyekwe ukuba zizinze kangangeentsuku ezisi-7 ngaphambi kokuba zitywinwe, zipakishwe, zifakwe ebhokisini, kwaye zithunyelwe ukuba zithengiswe.
Izinto eziphambili zeemaski - i-polypropylene fiber
Umaleko wokucoca (i-M layer) embindini weemaski zonyango lilaphu lokucoca elivuthelweyo, eyona nto ibalulekileyo, kwaye eyona nto iphambili yi-polypropylene melt blown material ekhethekileyo. Esi sixhobo sineempawu ze-ultra-high flow, ukuguquguquka okuphantsi, kunye nokusabalalisa ubunzima be-molecular. Umaleko wokucoca owenziweyo unokucoca okuqinileyo, ukukhuselwa, ukugquma, kunye neempawu zokufunxa ioyile, ezinokuhlangabezana nemigangatho eyahlukeneyo yenani leefayili kwindawo nganye kunye nommandla womphezulu womgangatho ongundoqo weemaski zonyango. Itoni enye yendawo ephezulu yokunyibilika yepolypropylene fiber inokuvelisa phantse i-250000 yepolypropylene N95 imaski yokhuseleko lwezonyango, okanye i-900000 ukuya kwi-1 yesigidi seemaski zotyando ezilahlwayo.
Isakhiwo se-polypropylene evuthelweyo sokucoca imathiriyeli yenziwe ngeentsinga ezininzi ezinqumlayo ezipakishwe ngendlela engacwangciswanga, kunye nedayamitha engumndilili wefayibha eyi-1.5 ~ 3 μ m, malunga ne-1/30 yedayamitha yeenwele zomntu. Umatshini wokuhluza we-polypropylene unyibilike izixhobo zokucoca ezivuthelweyo ikakhulu ubandakanya imiba emibini: isithintelo somatshini kunye ne-electrostatic adsorption. Ngenxa yeentsinga ze-ultrafine, indawo enkulu yendawo ethile, i-porosity ephezulu, kunye nobungakanani obuncinci bepore, i-polypropylene inyibilika ivuthelwe izixhobo zokucoca zinezithintelo ezilungileyo zebhaktheriya kunye neziphumo zokucoca. I-Polypropylene inyibilika isihluzo esivuthelweyo sinomsebenzi we-electrostatic adsorption emva konyango lwe-electrostatic.
Ubungakanani be-coronavirus yenoveli buncinci kakhulu, malunga ne-100 nm (0.1 μ m), kodwa intsholongwane ayinakho ukuzimela. Ikakhulu ikhona kwiimfihlo kunye namaconsi xa uthimla, kwaye ubukhulu bamaconsi bu malunga ne-5 μ m. Xa intsholongwane equlathe amathontsi isondela kwilaphu elinyibilikisiweyo, ziya kubhengezwa ngomphezulu we-electrostatically, zithintele ekungeneni kumaleko axineneyo aphakathi kwaye aphumeze isithintelo. Ngenxa yokuba intsholongwane inzima kakhulu ukuyikhupha ekucoceni emva kokuba ibanjwe yi-ultrafine electrostatic fibers, kwaye ukuhlamba kunokonakalisa isakhono sokufunxa i-electrostatic, olu hlobo lwemaski lunokusetyenziswa kube kanye kuphela.
Ukuqonda iFayibha yePolypropylene
I-polypropylene fiber, eyaziwa ngokuba yi-PP fiber, ibizwa ngokuba yi-polypropylene e-China. Ifayibha yePolypropylene yifiber eyenziwe ngepolymerizing propylene njengemathiriyeli ekrwada ukwenza i-polypropylene, kwaye emva koko iqhube uthotho lweenkqubo zokusonta. Iindidi eziphambili ze-polypropylene zibandakanya i-polypropylene filament, i-polypropylene ifayibha emfutshane, i-polypropylene ifayibha yokuqhekeka, i-polypropylene eyandisiweyo i-filament (BCF), i-polypropylene yamashishini, i-polypropylene engalukiweyo ilaphu, i-polypropylene i-cigarette tow, njl.
Ifayibha yePolypropylene isetyenziswa ikakhulu kwiikhaphethi (isiseko sekhaphethi kunye ne-suede), amalaphu okuhombisa, amalaphu efanitshala, iintambo ezahlukeneyo, iminatha yokuloba, ukufunxa ioyile, izixhobo zokuqinisa isakhiwo, izixhobo zokupakisha, kunye namalaphu emizi-mveliso anje ngelaphu lokucoca, ilaphu lengxowa, njl. njl. Iifayibha ze-Polypropylene ze-ultrafine zingasetyenziselwa ukuvelisa iingubo eziphezulu zempahla; Iqhina elenziwe ngeentsinga zepolypropylene ezihollow zikhaphukhaphu, zishushu, kwaye zinokunwebeka kakuhle.
Uphuhliso lweFayibha yePolypropylene
Ifayibha zePolypropylene luhlobo lwefayibha olwaqala ukuveliswa kwamashishini ngeminyaka yoo-1960. Ngowe-1957, uNatta waseItali et al. I-polypropylene ye-isotactic yokuqala yaphuhliswa kunye nokuveliswa kwemveliso yezoshishino. Kungekudala emva koko, inkampani yaseMontecatini yayisebenzisela ukuveliswa kwemicu yepolypropylene. Kwi-1958-1960, inkampani yasebenzisa i-polypropylene kwimveliso yefiber kwaye yabiza ngokuba yiMeraklon. Emva koko, imveliso yaqala eUnited States naseCanada. Emva ko-1964, ifilimu ye-polypropylene yahlula iintsinga zokudibanisa zaphuhliswa kwaye zenziwa iintsinga ezilukiweyo kunye nemisonto yekhaphethi ngefibrillation yefilimu ebhityileyo.
Kwiminyaka ye-1970, inkqubo yokujikeleza emfutshane kunye nezixhobo zaphucula inkqubo yokuvelisa i-polypropylene fibers. Ngelo xesha, i-filament eyandisiweyo eqhubekayo yaqala ukusetyenziswa kwishishini lekhaphethi, kwaye ukuveliswa kwefiber ye-polypropylene yaphuhliswa ngokukhawuleza. Emva kwe-1980, ukuphuhliswa kwe-polypropylene kunye nobuchwepheshe obutsha bokuvelisa i-polypropylene fibers, ngokukodwa ukuveliswa kwee-catalysts ze-metallocene, kwaphucula kakhulu umgangatho we-polypropylene resin. Ngenxa yokuphuculwa kwe-stereoregularity yayo (isotropy ukuya kwi-99.5%), umgangatho wangaphakathi we-polypropylene fibers uphuculwe kakhulu.
Phakathi kwiminyaka yoo-1980, iintsinga zepolypropylene ultra-fine zathatha indawo yezinye iintsinga zomqhaphu kumalaphu elaphu kunye namalaphu angalukwanga. Okwangoku, uphando kunye nophuhliso lweentsinga zepolypropylene ziyasebenza kumazwe ahlukeneyo kwihlabathi liphela. Ukuthandwa kunye nokuphuculwa kweteknoloji yokuvelisa ifayibha eyahlukanisiweyo iye yandisa kakhulu imimandla yesicelo se-polypropylene fibers.
Ubume bemicu yepolypropylene
I-Polypropylene yimolekyuli enkulu eneathom zekhabhoni njengekhonkco eliphambili. Ngokuxhomekeke kulungiselelo lwesithuba samaqela ayo e-methyl, kukho iindidi ezintathu zezakhiwo ezine-dimensional: random, iso rhoqo, kunye ne-meta rhoqo. Iiathom zekhabhoni kwikhonkco eliphambili leemolekyuli ze-polypropylene zikwindiza enye, kwaye amaqela abo e-methyl asecaleni anokucwangciswa kumalungiselelo ahlukeneyo esithuba nangaphantsi kweyona nqwelo-moya ingundoqo.
Ukuveliswa kwee-polypropylene fibers isebenzisa i-isotactic polypropylene ene-isotropy enkulu kune-95%, ene-crystallinity ephezulu. Ulwakhiwo lwayo yityathanga elijikelezayo eliqhelekileyo elinobume obuthathu. Ikhonkco eliphambili leathom liqulunqwe ngamatyathanga e-carbon athom ephothiweyo kwinqwelomoya enye, kwaye amaqela e-methyl asecaleni akwicala elinye lenqwelomoya yekhonkco. Le crystallization ayiyona nje isakhiwo esiqhelekileyo samatyathanga ngamnye, kodwa iphinde ibe ne-chain stacking rhoqo kwicala elifanelekileyo le-axis ye-chain. I-crystallinity ye-primary polypropylene fibers yi-33% ~ 40%. Emva kokwelula, i-crystallinity iyanda ukuya kwi-37% ~ 48%. Emva kokunyanga ubushushu, i-crystallinity inokufikelela kwi-65% ~ 75%.
Iintsinga zePolypropylene zikholisa ukwenziwa ngendlela yokunyibilika. Ngokuqhelekileyo, iifayili zihamba kakuhle kwaye zithe tye kwi-longitudinal direction, ngaphandle kwemivimbo, kunye ne-circular cross-section. Ziphinde zijikwe zibe yimicu engaqhelekanga kunye nemicu edibeneyo.
Iimpawu zokusebenza zemicu yepolypropylene
Ubume
Olona phawu lukhulu lwepolypropylene kukukhanya kwayo, kunye noxinzelelo lwe-0.91g/cm ³, olukhaphukhaphu kunamanzi kunye ne-60% kuphela yobunzima bomqhaphu. Lolona didi loxinaniso lukhaphukhaphu phakathi kwemicu yekhemikhali eqhelekileyo, i-20% ikhaphukhaphu kunenylon, i-30% ikhaphukhaphu kunepolyester, kunye ne-40% ikhaphukhaphu kunefiber ye-viscose. Kufanelekile ukwenza iimpahla zemidlalo yamanzi.
Iimpawu ezibonakalayo
I-Polypropylene inamandla amakhulu kunye nobude be-fracture ye-20% -80%. Amandla ayancipha ngokunyuka kweqondo lokushisa, kwaye i-polypropylene ine-modulus ephezulu yokuqala. Ikhono layo lokubuyisela i-elastic lifana ne-nylon 66 kunye ne-polyester, kwaye ingcono kune-acrylic. Ngokukodwa, amandla ayo okubuyisela ngokukhawuleza okulastiki mkhulu, ke ilaphu le-polypropylene nalo liyakwazi ukunxiba. Ilaphu lePolypropylene aliqhelekanga ukushwabana, ngenxa yoko lihlala ixesha elide, ubungakanani bempahla buzinzile, kwaye abunakukhubazeka ngokulula.
Ukufunxa ukufuma kunye nokusebenza ukudaya
Phakathi kweentsinga zokwenziwa, i-polypropylene ineyona nto ifunxa ukufuma imbi kakhulu, ngokuphantse ukuba ngu-zero ukufuma kwakhona phantsi kweemeko eziqhelekileyo zomoya. Ngoko ke, amandla ayo omileyo namanzi kunye namandla okuqhekeka aphantse alingane, okwenza ukuba ifaneleke ngokukodwa ukwenza iminatha yokuloba, iintambo, ilaphu lokuhluza, kunye ne-gauze yokubulala iintsholongwane kwiyeza. I-Polypropylene ixhomekeke kumbane ongatshintshiyo kunye neepilisi ngexesha lokusetyenziswa, kunye nezinga eliphantsi lokunciphisa. Ilaphu kulula ukulihlamba kwaye lome ngokukhawuleza, kwaye liqinile. Ngenxa yokufunxa ukufuma okulambathayo kunye nokugcwala kwayo xa kunxitywe, i-polypropylene isoloko idityaniswa nemicu enokufunxa ukufuma okuphezulu xa isetyenziswa kwiilaphu zempahla.
I-Polypropylene inesakhiwo esiqhelekileyo se-macromolecular kunye ne-crystallinity ephezulu, kodwa ayinalo amaqela asebenzayo anokuthi abophe ii-molecule zedayi, okwenza kube nzima ukudaya. Idayi eziqhelekileyo azinambala. Ukusebenzisa iidayi ezisasaziweyo ukudaya i-polypropylene kunokukhokelela kuphela kwimibala ekhaphukhaphu kakhulu kunye nokukhawuleza kombala obuthathaka. Ukuphucula ukusebenza kokudaya kwe-polypropylene kunokufezekiswa ngeendlela ezinje nge-graft copolymerization, umbala wolwelo wokuqala, kunye nokuguqulwa kwekhompawundi yentsimbi.
Iimpawu zeMichiza
I-Polypropylene inamandla okumelana neekhemikhali, ukuhlaselwa kwezinambuzane kunye nokungunda. Ukuzinza kwayo ngokuchasene ne-asidi, i-alkali, kunye nezinye ii-agent zeekhemikhali ziphezulu kunezinye iifayili zokwenziwa. I-Polypropylene inokumelana kakuhle nokubola kweekhemikhali, ngaphandle kwe-nitric acid egxininisiweyo kunye nesoda ye-caustic. Inokumelana kakuhle ne-asidi kunye ne-alkali, iyenza ilungele ukusetyenziswa njengento yokucoca kunyeizinto zokupakisha.Nangona kunjalo, ukuzinza kwayo kwizinyibilikisi eziphilayo kumbi kancinane.
Ukumelana nobushushu
I-Polypropylene yifayibha ye-thermoplastic enendawo esezantsi yokuthambisa kunye nendawo yokunyibilika kunezinye iintsinga. Ubushushu bendawo yokuthambisa yi-10-15 ℃ ngaphantsi kwendawo yokunyibilika, nto leyo ekhokelela ekuxhathiseni ubushushu. Ngexesha lokudaya, ukugqiba, kunye nokusetyenziswa kwe-polypropylene, kuyimfuneko ukunikela ingqalelo kulawulo lobushushu ukuphepha ukuguqulwa kweplastiki. Xa ishushu kwiimeko ezomileyo (ezifana namaqondo obushushu angaphezu kwe-130 ℃), i-polypropylene iyakuqhekeka ngenxa ye-oxidation. Ngoko ke, i-agent anti-aging (i-heat stabilizer) isoloko ifakwe kwimveliso ye-polypropylene fiber ukuphucula ukuzinza kwe-polypropylene fiber. Kodwa i-polypropylene inokuchasana okungcono kumswakama kunye nobushushu. Bilisa emanzini abilayo iiyure ezininzi ngaphandle kokuguqulwa.
Okunye ukusebenza
I-Polypropylene inokukhanya okungahambi kakuhle kunye nokuchasana kwemozulu, iyakwazi ukuguga, ayinakumelana ne-ayina, kwaye kufuneka igcinwe kude nokukhanya kunye nobushushu. Nangona kunjalo, ipropati yokuchasana nokuguga ingaphuculwa ngokudibanisa i-agent echasayo ngexesha lokujikeleza. Ukongeza, i-polypropylene ine-insulation elungileyo yombane, kodwa ithanda umbane ongatshintshiyo ngexesha lokulungiswa. I-Polypropylene ayilula ukutshisa. Xa imicu icutheka ize inyibilike kwidangatye, idangatye linokuzicima ngokwalo. Xa itshisiwe, yenza ibhloko eqinileyo ecacileyo enevumba le-asphalt elincinane.
Dongguan Liansheng Non woven Technology Co., Ltd.yasekwa ngoMeyi 2020. Lishishini elikhulu lemveliso yelaphu elingalukiweyo elidibanisa uphando nophuhliso, imveliso, kunye neentengiso. Inokuvelisa imibala eyahlukeneyo ye-PP spunbond amalaphu angalukwanga kunye nobubanzi obungaphantsi kwe-3.2 yeemitha ukusuka kwi-9 grams ukuya kwi-300 grams.
Ixesha lokuposa: Oct-14-2024