Kulungile, makhe sichaze ngokweenkcukacha umgaqo wokuguqulwa kwe-elastomer ukuphucula ukuqina kweamalaphu e-spunbond angalukwanga. Lo ngumzekelo oqhelekileyo wokuphumeza ukusebenza okuphezulu "ngokwandisa amandla kunye nokunciphisa ubuthathaka" ngokusebenzisa izinto eziphathekayo.
Iingcamango ezingundoqo: Ukuqina vs. Brittleness
Okokuqala, makhe siqonde "ukuqina." Ukuqina bubuchule bemathiriyeli bokufunxa amandla kwaye bungene kwi-deformation yeplastiki de ibe yophuka phantsi koxinzelelo. Isixhobo esinokuqina okuhle komelele kwaye siyakwazi ukuqina, sidinga umsebenzi omninzi wokuqhekeka.
Izinto ezinqabileyo (ezifana ne-polypropylene engaguqukiyo): Ngaphantsi kwamandla angaphandle, iintambo ze-molecular azinalo ixesha lokuhlengahlengisa, uxinzelelo lugxininise kwiziphene, ezikhokelela ngokuthe ngqo ukuphuka ngokukhawuleza kunye nokunyuka okuphantsi kwekhefu.
Izinto ezinzima: Ngaphantsi kwamandla angaphandle, banokuvelisa kwaye baqhube i-deformation yeplastiki, basebenzise umthamo omkhulu wamandla kwinkqubo, ngaloo ndlela bexhathisa ukuphuka.
Eyona njongo yohlengahlengiso lwe-elastomer kukuguqula iipholima ze-semi-crystalline ezifana ne-polypropylene ukusuka ekuziphatheni okunokwaphuka kwe-brittle ukuya kwi-ductile fracture.
Imigaqo-siseko eneenkcukacha yoLungiso lwe-Elastomer
Umgaqo unokuqondwa kuwo omabini amanqanaba e-microscopic kunye ne-macroscopic. Undoqo ulele kumasuntswana e-elastomer asebenza njengamanqaku oxinzelelo kunye nezinto ezithatha amandla.
1. IMicroscopic Mechanical Mechanism: Ukungeniswa kunye nokupheliswa koku Crazing, ukuPhakanyiswa kweSivuno sokucheba
Lo ngowona mgaqo ubalulekileyo. Xa ilaphu le-spunbond liphantsi kwamandla angaphandle (njengokukrazulwa okanye impembelelo), ezi nkqubo zilandelayo zenzeka ngaphakathi:
a) UkuQiniswa koxinzelelo kunye nokuQalwa kokuPhila
Ii-elastomers (ezifana ne-EPDM, i-POE) azihambelani okanye azihambelani ne-polypropylene matrix. Ngoko ke, emva kokudibanisa, zisasazwa njengezakhiwo ezincinci, ezihlakazekileyo "zesiqithi" ngaphakathi kwesigaba esiqhubekayo se-polypropylene "solwandle".
Ekubeni i-modulus ye-elastomer iphantsi kakhulu kune-polypropylene, uxinzelelo olukhulu loxinzelelo lwenzeka kwi-interface phakathi kwezigaba ezimbini xa ziphantsi kwamandla angaphandle.
Ezi ndawo zoxinzelelo zoxinzelelo ziba ziindawo zokuqalisa ukurhalela. I-Crazing ayiyonkqantosi, kodwa i-microporous fiber bundle structure perpendicular to the stress direction, isadityaniswe ngaphakathi ngeefiber zepolymer. Ukubunjwa kwe-crazing kuthatha umthamo omkhulu wamandla.
b) Ukupheliswa kweCrazing kunye noLwakhiwo lweBhanti yokucheba
Indima yesibini ephambili yamasuntswana e-elastomer kukuphelisa ukuhlanya. Xa inkanuko idibana namasuntswana e-elastomer aguquguqukayo ngexesha lokusasaza kwayo, ibala loxinzelelo oluphezulu kwincam yalo liba buthuntu, lithintele inkanuko ekuphuhliseni ibe ziintanda ezibulalayo.
Kwangaxeshanye, uxinzelelo loxinzelelo luphinda lukhuthaze ukuchetywa kwe-polypropylene matrix. Oku kubhekiselele kwisalamane sokutyibilika kunye nokuhlengahlengiswa kwamatyathanga e-polypropylene molekyuli phantsi koxinzelelo lwe-shear, ukwenza iibhendi zokucheba; le nkqubo ikwafuna isixa esibalulekileyo samandla.
c) Indlela yokuNciphisa amandla e-Synergistic
Ekugqibeleni, amandla asetyenziswa ngaphandle achithwa ngokuyintloko ngezi ndlela zilandelayo:
Ukwenza izinto ezininzi eziphambeneyo: ukusetyenziswa kwamandla.
Ukuguqulwa kunye nokuqhekeka kwamaqhekeza e-elastomer ngokwawo: ukusetyenziswa kwamandla.
Ukuchetywa kwe-matrix: ukusetyenziswa kwamandla.
I-Interfacial debonding: i-elastomer particles ephuma kwi-matrix, ukusetyenziswa kwamandla.
Le nkqubo yonyusa kakhulu umsebenzi ofunekayo wokwaphuka kwezinto, okubonakaliswa ngokubonakalayo njengophuculo olubonakalayo kumandla empembelelo kunye nokuxhathisa ukukrazula, ngelixa ikwanyusa kakhulu ubude ngexesha lekhefu.
2. Utshintsho lweSigaba soLwakhiwo: Ukuchaphazela i-Crystallization Behaviour
Ukongezwa kwee-elastomers akusebenzi nje "njengezongezo" zomzimba kodwa kuchaphazela i-microstructure ye-polypropylene.
Ukucoca i-Spherulites: Iincinci ze-Elastomer zinokusebenza njengeendawo ze-nucleation ze-heterogeneous, ziphazamisa ukucwangciswa rhoqo kwee-polypropylene ze-molecular chain kwaye zibangele ukuba zikhanye zibe yi-finer, i-denser spherulite izakhiwo.
Ukuphucula i-Interface: Ngokusebenzisa i-compatibilizers, ukudibanisa kwe-interfacial adhesion phakathi kwe-elastomer kunye ne-polypropylene matrix inokuphuculwa, ukuqinisekisa ukuba uxinzelelo lunokudluliselwa ngokufanelekileyo ukusuka kwi-matrix ukuya kwiincinci ze-elastomer, ngaloo ndlela zenza ngempumelelo i-crazes kunye ne-shear banding.
Izicelo eziKhethekileyo kwiMveliso yeFabric yeSpunbond Nonwoven
Ukusebenzisa le migaqo ingasentla ekuvelisweni kwamalaphu angalukwanga e-spunbond kunezi ziphumo zilandelayo:
Ukuqina okongeziweyo kweeFayibha zoMnye:
Ngethuba lenkqubo yokujikeleza, i-polypropylene inyibilika equkethe i-elastomers yoluliwe ibe yimicu. Iintsinga ezitshintshiweyo ngokwazo ziba nzima. Ngaphantsi kwamandla angaphandle, iintsinga azifanekanga kukuqhekeka kwaye zinokungena kwi-deformation enkulu yeplastiki, zifunxa amandla amaninzi.
Ukomelezwa kunye nokuQinisekiswa koLwakhiwo lweFiber Network:
Ngethuba lokuqiniswa kwe-hot rolling, i-fibers idibanisa kwindawo yokuguqa. Iintsinga ezinobulukhuni obungcono azifane ziphuke ngoko nangoko kwindawo yokuqengqeleka xa ziphantsi kwamandla akrazukileyo.
Amandla angaphandle anokwabiwa ngokusebenzayo ngakumbi kuthungelwano lwefiber. Xa i-fiber iphantsi koxinzelelo olubalulekileyo, inokudlulisela uxinzelelo kwimicu ejikelezileyo ngokuguqulwa, ukuthintela ukusilela okukhawulezayo okubangelwa kukugxininiswa koxinzelelo.
Ukutsibela phambili ekukraleni kunye nokuchasana nokugqobhoza:
Ukuxhathisa kweenyembezi: Ukukrazula yinkqubo yokusasazwa kweentanda. Amasuntswana e-Elastomer aqalisa ngokufanelekileyo kwaye aphelise ii-microcracks ezininzi, ezithintela ukuba zingadibanisi zibe ziintanda ze-macroscopic, zicothisa kakhulu inkqubo yokukrazula.
Ukumelana nokugqobhoza: Ukuhlatywa yindibaniselwano entsonkothileyo yempembelelo kunye nokukrazula. Izinto ezinobunzima obuphezulu zinokungena kwisivuno esikhulu kunye nokuguqulwa xa into yangaphandle igqobhoza, igqume into yokugqobhoza endaweni yokugqobhozwa ngokuthe ngqo.
Ukuqukumbela
Isishwankathelo: Umgaqo wokuguqulwa kwe-elastomer ukuphucula ukuqina kwe-spunbond nonwovens kubaluleke kakhulu ukudibanisa i-polypropylene matrix eqinile kodwa e-brittle kunye nerabha ethambileyo, e-elastiki ephezulu, eyakha inkqubo esebenzayo yokulahla amandla ngaphakathi kwemathiriyeli.
Ngokubangela ukukhwabanisa, ukuphelisa iintanda, kunye nokukhuthaza ukuchetywa kwe-chear ngokusebenzisa iindlela ze-microscopic mechanical, amandla atshabalalisayo (impembelelo, ukukrazula) asetyenziswe ngaphandle aguqulwa abe ngumsebenzi omncinci omncinci, ongonakalisiyo. Oku kuphucula ngokubonakalayo ukuxhathisa kwempembelelo yemathiriyeli, ukuxhathisa kokukrazula, kunye nobude ngexesha lekhefu, ukuguqula ilaphu le-spunbond elingalukwanga lisuka “elubuthathaka” ukuya “lokuqina.” Oku kufana nokongeza imivalo yentsimbi kwisamente, enganyusi nje kuphela amandla kodwa, okona kubaluleke kakhulu, ibonelela ngobulukhuni obubalulekileyo.
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 anobubanzi obungaphantsi kwe-3.2 yeemitha ukusuka kwi-9 grams ukuya kwi-300 grams.
Ixesha lokuposa: Nov-16-2025