Njengento eyinhloko yokusetshenziswa kumaski, indwangu encibilikisiwe isanda kubiza kakhulu eChina, ifinyelela phezulu njengamafu. Intengo yemakethe ye-high melt index polypropylene (PP), impahla eluhlaza yezindwangu ezincibilikisiwe, nayo inyuke kakhulu, futhi imboni yasekhaya ye-petrochemical ibangele igagasi lokuguqulelwa ezintweni ze-polypropylene ezinenkomba ephezulu.
Ngendlela, kufanele kuqashelwe ukuthi izinto zangempela ezincibilikayo ziyakwazi ukubola. I-2040 evame ukusetshenziswa emakethe imane nje iyinto evamile ye-PP, futhi izinto zangempela ze-PP ezincibilikayo zonke zishintshiwe. Njengamanje, emishinini emincane (ama-extruder ashintshiwe) emakethe, ukusebenzisa izinto ezincibilikayo ezincibilikayo akuzinzile. Uma umshini umkhulu, kuba ngcono umphumela wokusebenzisa izinto ezincibilikayo ze-PP ezincibilikayo. Izinkinga zekhwalithi zemishini emincane ngokwazo zilandisa ingxenye enkulu yezizathu. Indwangu encibilikisiwe evamile idinga ukusetshenziswa kwezinto ezikhethekile ze-meltblown eziyi-1500 zeminwe encibilikayo, ngokungezwa kwe-polar masterbatch kanye nokwelashwa kwenqubo ye-polar ukuze kuthuthukiswe ukusebenza kahle kokuhlunga.
Namuhla, umhleli uhlanganise isiqephu sendatshana mayelana nezici zokusebenza zokuguquliweIzinto ezincibilikayo ze-PP, ngethemba lokuba usizo kuwo wonke umuntu. Uma ufuna ukukhiqiza izindwangu ezincibilikisiwe ezihlangabezana namazinga kazwelonke we-KN90, KN95, kanye ne-KN99, udinga ukuqonda yonke inqubo yokukhiqiza, ukhombe inqubo eyeqiwe, futhi ukwenzele yona. Okokuqala, ake siqale ngezinto ezingavuthiwe ezincibilikisiwe.
Iphuzu elincibilikayo eliphakeme libhekisela ezintweni ezincibilikayo zebanga le-PP
Omaski abakhiqizayo abakwazi ukwenza ngaphandle kwendwangu ye-spunbond nendwangu encibilikayo, kokubili okuyizinto ezincibilikayo ze-PP ngemuva kokuwohloka. Ukuphakama kwenkomba encibilikayo ye-PP esetshenziselwa ukwenza indwangu encibilikisiwe, kulapho amafayibha aphephuka kahle, futhi kuba ngcono nokusebenza kokuhlunga kwendwangu encibilikisiwe ewumphumela. I-PP enesisindo esiphansi samangqamuzana kanye nokusatshalaliswa kwesisindo se-molecular kulula ukukhiqiza imicu ngokufana okuhle.
Impahla eluhlaza yokukhiqiza imaski ye-S-layer (indwangu ye-spunbond) ikakhulukazi inkomba ephezulu yokuncibilika kwe-PP enenkomba yokuncibilika phakathi kuka-35-40, kanti impahla yokukhiqiza ungqimba lwe-M (indwangu encibilikisiwe) iyibanga le-PP elincibilikayo elinenkomba ephezulu yokuncibilika (1500). Ukukhiqizwa kwalezi zinhlobo ezimbili zephoyinti eliphezulu lokuncibilika kwe-PP akukwazi ukuhlukaniswa nempahla eluhlaza eyinhloko, okuyi-organic peroxide degradation agent.
Ngenxa yenkomba yokuncibilika ngokuvamile ephansi ye-PP evamile, ukugeleza kwayo esimweni esincibilikisiwe kubi, okukhawulela ukusetshenziswa kwayo emikhakheni ethile. Ngokungeza ama-peroxides e-organic ukuze kuguqulwe i-polypropylene, inkomba yokuncibilika kwe-PP inganyuswa, isisindo sayo samangqamuzana singancishiswa, futhi ukusatshalaliswa kwesisindo samangqamuzana ku-PP kungancishiswa, okuholela ekugelezeni okungcono kanye nezinga eliphezulu lokudweba. Ngakho-ke, i-PP eshintshwe ukuwohloka kwe-organic peroxide ingasetshenziswa kabanzi ekubunjweni komjovo onezindonga ezincane nezingalukiwe.
Ama-ejenti amaningi okwehlisa i-peroxide
Ama-peroxides angamakhemikhali ayingozi eSigaba 5.2 anezidingo eziqinile zokukhiqiza, ukugcinwa, ukuthutha, nokusetshenziswa. Njengamanje, kunama-peroxide ambalwa kuphela asetshenziswa ngokuyinhloko ukucekelwa phansi kwe-PP eChina. Nazi ezimbalwa:
I-peroxide ye-butyl (DTBP)
Izici zayo eziyinhloko zimi kanje:
Akugunyazwanga yi-FDA ukuthi kwengezwe ku-PP, akunconyelwe ukukhiqizwa kwebanga lokudla nemikhiqizo yebanga lokuhlanzeka.
Iphoyinti elikhanyayo lingu-6 ℃ kuphela, futhi lizwela kakhulu kugesi omile. I-0.1MJ yamandla yanele ukuthungela umhwamuko wayo, okwenza kube lula ukubaneka futhi iqhume ezingeni lokushisa legumbi; Ngisho nokuvikelwa kwe-nitrogen, isengakhanya futhi iqhume endaweni engaphezu kuka-55 ℃.
I-coefficient ye-conductivity iphansi kakhulu, okwenza kube lula ukuqongelela amanani phakathi nenqubo yokugeleza.
I-DTBP yahlukaniswa yi-European Chemicals Agency (ECHA) ngo-2010 njengento eshintsha izakhi yofuzo ekuZingeni 3 futhi ayikwazi ukunconywa ukuthi isetshenziswe njengesengezo ekuthintaneni nokudla kanye nokuxhumana ngqo nemikhiqizo yabantu, njengoba kunobungozi obukhulu bokubangela i-biotoxicity.
2,5-dimethyl-2,5-bis (tert butylperoxy) hexane (okubhekiselwa kuyo ngokuthi “101″)
Le ejenti yokucekela phansi ingenye yama-peroxides asekuqaleni asetshenziswa emkhakheni wokucekelwa phansi kwe-PP. Ngenxa yebanga lokushisa elifanele kanye nokuqukethwe okuphezulu kwezinhlobo zomoya-mpilo osebenzayo, kanye nokugunyazwa kwe-FDA e-United States kanye nokugunyazwa kwe-BfR eYurophu, kuseyi-ejenti yokucekela phansi esetshenziswa kabanzi kulo mkhakha. Ngenxa yokuqukethwe okuphezulu kwezinhlanganisela eziguquguqukayo emikhiqizweni yayo yokubola, okuyizinhlanganisela eziguquguqukayo eziningi ezinamaphunga anamandla aphunga, umphumela wokuncibilika okuphezulu kwe-PP unokunambitheka okuqinile. Ikakhulukazi ezintweni ezincibilikayo ezisetshenziswa ekukhiqizweni kwemaski, ukwengezwa kwenani elikhulu lama-ejenti amoshayo kungabangela izinkinga ezinkulu zephunga lezindwangu ezincibilikayo ezingaphansi komfula.
3,6,9-Triethyl-3,6,9-Trimethyl-1,4,7-Triperoxynonane (okubhekiselwa kuyo ngokuthi “301″)
Uma kuqhathaniswa namanye ama-ejenti okwehlisa isithunzi, i-301 inokusebenza okuhle kakhulu kokuphepha kanye nokusebenza kahle kokucekela phansi, kanye nephunga eliphansi kakhulu, okuyenza ibe enye yezinketho ezikhethwayo zokwehlisa isithunzi se-PP. Izinzuzo zayo zimi kanje:
● Kuphephe kakhudlwana
Izinga lokushisa elizisheshayo lokubola lingu-110 ℃, futhi indawo ekhanyayo nayo iphakeme njengo-74 ℃, engavimbela ngempumelelo ukubola kanye nokushiswa kwe-flash kwe-ejenti yokuwohloka ngesikhathi senqubo yokuphakela. Iwumkhiqizo we-peroxide ophephe kunazo zonke phakathi kwama-ejenti adicilela phansi aziwayo.
● Isebenza kahle kakhulu
Ngenxa yokuba khona kwamabhondi amathathu e-peroxide ku-molecule, ukwengezwa kwengxenye efanayo yezinhlobo ze-oksijini esebenzayo kunganikeza ama-radicals wamahhala, okuthuthukise ngempumelelo ukuwohloka kwemvelo.
Iphunga eliphansi
Uma kuqhathaniswa ne-"Double 25", izinhlanganisela eziguquguqukayo ezikhiqizwa ukubola kwazo ziyingxenye eyodwa kweshumi yaleyo yeminye imikhiqizo, futhi izinhlobo zezinhlanganisela eziguquguqukayo ziyi-ester enephunga eliphansi, ngaphandle kwezinhlanganisela ezicasulayo ezicasulayo. Ngakho-ke, kunganciphisa kakhulu iphunga lomkhiqizo, okusiza ukuthuthukisa izimakethe ezisezingeni eliphezulu ngenani eliqinile lephunga elinamandla, futhi kunciphise iphunga elibi lomkhiqizo. ingozi yokululaza imikhiqizo ye-PP ngesikhathi sokugcinwa nokuthutha, ngaleyo ndlela kuthuthukisa ukuphepha ngempumelelo.
Nakuba i-DTBP ingasanconyiwe njenge-ejenti yokuwohloka kwe-PP eguquliwe, kusekhona abakhiqizi abathile basekhaya abasebenzisa i-DTBP njenge-ejenti yokuwohloka ukuze kukhiqizwe inkomba ephezulu yokuncibilika kwe-PP, ebeka izingozi eziningi zokuphepha enqubweni yokukhiqiza nasezindaweni ezisetshenziswayo ezilandelayo. Imikhiqizo ewumphumela nayo inezinkinga ezinkulu zephunga, futhi kunengozi enkulu yokwenqatshwa noma yokwehluleka ukuphumelela ukuhlolwa lapho ithunyelwa emakethe yamazwe ngamazwe.
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.
Isikhathi sokuthumela: Nov-09-2024