Kulungile, ake sichaze ngokuningiliziwe umgomo wokuguqulwa kwe-elastomer ukuthuthukisa ukuqina kweizindwangu ezingalukiwe ze-spunbond. Lesi isibonelo esijwayelekile sokuthola ukusebenza okuphezulu "ngokukhulisa amandla nokunciphisa ubuthakathaka" ngokusebenzisa izinhlanganisela zezinto.
Imiqondo eyinhloko: Ukuqina vs. Brittleness
Okokuqala, masiqonde “ukuqina.” Ukuqina yikhono lezinto ezibonakalayo lokumunca amandla futhi lingene kupulasitiki kuze kube yilapho liphuka ngaphansi kwengcindezi. Impahla enokuqina okuhle iqinile futhi iqinile, idinga inani elikhulu lomsebenzi ukuze iphuke.
I-Brittle materials (njenge-polypropylene engashintshiwe): Ngaphansi kwamandla angaphandle, amaketanga e-molecular awabi naso isikhathi sokuhlela kabusha, ukucindezeleka kugxila ekushiyekeni, okuholela ngokuqondile ekuqhekekeni okusheshayo kanye nobude obuphansi ngesikhathi sokuphumula.
Izinto eziqinile: Ngaphansi kwamandla angaphandle, zingakwazi ukukhiqiza futhi zenze i-plastic deformation, zidle inani elikhulu lamandla kule nqubo, ngaleyo ndlela zimelane nokuphuka.
Inhloso eyinhloko yokuguqulwa kwe-elastomer ukuguqula ama-semi-crystalline polymers njenge-polypropylene ukusuka ekuziphatheni kokuphuka okuphukayo ukuya ekuziphatheni kokuphuka kwe-ductile.
Izimiso ezinemininingwane zokuguqulwa kwe-Elastomer
Umgomo ungaqondwa kusukela kokubili amazinga amancane nama-macroscopic. Umongo ulele ezinhlayiyeni ze-elastomer ezisebenza njengamaphoyinti okugxilisa ingqondo kanye nezimunca amandla.
1. I-Microscopic Mechanical Mechanism: Ukwethulwa kanye Nokuqedwa Kokuhlanya, Ukuphromothwa Kwe-Shear Yield
Lesi yisimiso esibaluleke kakhulu. Uma indwangu ye-spunbond ingaphansi kwamandla angaphandle (njengokudabuka noma umthelela), lezi zinqubo ezilandelayo zenzeka ngaphakathi:
a) I-Stress Concentration and Crazing Initiation
Ama-Elastomer (afana ne-EPDM, POE) awahambisani noma asebenzisane kancane ne-polypropylene matrix. Ngakho-ke, ngemva kokuxuba, zisakazwa njengezakhiwo ezincane, ezihlakazekile "zesiqhingi" ngaphakathi kwesigaba esiqhubekayo se-polypropylene "solwandle".
Njengoba i-modulus ye-elastomer iphansi kakhulu kune-polypropylene, ukugxila okukhulu kwengcindezi kwenzeka esibonakalayo phakathi kwezigaba ezimbili lapho kungaphansi kwamandla angaphandle.
Lawa maphuzu okugxilisa ingqondo abe yizindawo zokuqala zokuhlanya. I-Crazing ayikona ukuqhekeka, kodwa kunalokho i-microporous fiber bundle structure perpendicular to stress direction, isaxhunywe ngaphakathi ngemicu ye-polymer. Ukwakheka kokuhlanya kuthatha inani elikhulu lamandla.
b) I-Crazing Termination kanye Nokwakhiwa Kwebhendi Le-Shear
Indima yesibili ebalulekile yezinhlayiya ze-elastomer ukuqeda ukuhlanya. Lapho ukuhlanya kuhlangana nezinhlayiya ze-elastomer eziguquguqukayo phakathi nokusakazwa kwayo, inkundla yokucindezeleka okuphezulu ekugcineni kwayo iba buthuntu, ivimbele ukuhlanya ukuthi kukhule kube imifantu ebulalayo enkulu.
Ngasikhathi sinye, ukugxilwa kwengcindezi nakho kudala ukuvuzwa kwe-shear ku-polypropylene matrix. Lokhu kubhekisela ekusheleleni okuhlobene nokuhlelwa kabusha kwamaketanga e-polypropylene amangqamuzana ngaphansi kokucindezeleka kwe-shear, ukwakha amabhande okugunda; le nqubo idinga nenani elikhulu lamandla.
c) I-Synergistic Energy Dissipation Mechanism
Ekugcineni, amandla asetshenziswa ngaphandle ahlakazwa ngokuyinhloko ngalezi zindlela ezilandelayo:
Ukwakha ama-crazing amaningi: ukusetshenziswa kwamandla.
Ukuguqulwa nokuphuka kwezinhlayiya ze-elastomer ngokwazo: ukusetshenziswa kwamandla.
Ukukhishwa kwe-Shear kwe-matrix: ukusetshenziswa kwamandla.
I-interfacial debonding: izinhlayiya ze-elastomer ezixebuka ku-matrix, ukusetshenziswa kwamandla.
Le nqubo inyusa kakhulu umsebenzi odingekayo wokuphuka kwempahla, okubonakala ngokubonakalayo njengokuthuthuka okuphawulekayo kumandla omthelela kanye nokumelana nezinyembezi, kuyilapho ikhulisa kakhulu ubude ngesikhathi sekhefu.
2. Izinguquko Zesakhiwo Sesigaba: Ezithinta Ukuziphatha Kwe-Crystallization
Ukwengezwa kwama-elastomers akusebenzi nje "njengesengezo" somzimba kuphela kodwa futhi kuthinta i-microstructure ye-polypropylene.
Ukucwenga ama-Spherulite: Izinhlayiya ze-Elastomer zingasebenza njengezindawo ze-nucleation ezingafani, ziphazamise ukuhlelwa okuvamile kwamaketanga e-polypropylene amangqamuzana futhi kuwenze acwebezele abe yizakhiwo ezicwebezelayo, eziminyene kakhulu ze-spherulite.
Ukuthuthukisa isixhumi esibonakalayo: Ngokusebenzisa ama-compatibilizers, ukunamathela kobuso phakathi kwe-elastomer kanye ne-polypropylene matrix kungathuthukiswa, kuqinisekiswe ukuthi ukucindezeleka kungadluliswa ngokuphumelelayo kusuka ku-matrix kuya ezinhlayiyeni ze-elastomer, ngaleyo ndlela kubangele ngokuphumelelayo ukuhlanya kanye ne-shear banding.
Izicelo Eziqondile Ekukhiqizeni Indwangu Yendwangu Engenayo I-Spunbond
Ukusebenzisa lezi zimiso ezingenhla ekukhiqizeni izindwangu ezingalukiwe ze-spunbond kunemiphumela elandelayo:
Ukuqina Okuthuthukisiwe Kwemicu Ngayodwa:
Ngesikhathi sokuphotha, ukuncibilika kwe-polypropylene okuqukethe ama-elastomers kunwetshwa kube imicu. Imicu eguquliwe ngokwawo iba namandla. Ngaphansi kwamandla angaphandle, imicu ayijwayele ukuphuka futhi ingashintsha kakhulu ipulasitiki, imunce amandla engeziwe.
Ukuqiniswa kanye Nokuqiniswa Kwesakhiwo Senethiwekhi Ye-Fiber:
Ngesikhathi sokuqiniswa kokuginqika okushisayo, imicu iyahlangana endaweni eginqikayo. Amafayibha anokuqina okungcono mancane amathuba okuthi aphuke khona manjalo lapho kuginqika lapho ebhekene namandla okudabula.
Amandla angaphandle angasatshalaliswa kabusha ngempumelelo kuyo yonke inethiwekhi yefiber. Uma i-fiber ingaphansi kwengcindezi enkulu, ingadlulisela ingcindezi kumafayibha azungezile ngokusebenzisa ukuguqulwa, ukuvimbela ukwehluleka okusheshayo okubangelwa ukugxila kokucindezeleka.
Ukugxumela phambili ekulweni nezinyembezi nokubhoboza:
Ukumelana nezinyembezi: Ukudabula kuyinqubo yokusabalalisa imifantu. Izinhlayiya ze-elastomer ziqala futhi zinqamule ama-microcracks amaningi, ziwavimbele ukuthi angahlangani abe imifantu emikhulu, ebambezela kakhulu inqubo yokudabuka.
Ukumelana nokubhoboza: Ukubhoboza kuyinhlanganisela eyinkimbinkimbi yomthelela nokuklebhula. Izinto ezinokuqina okuphezulu zingabhekana nokuhoxa okukhulu kanye nokuguquka lapho into yangaphandle ibhoboza, ivale into ebhobozayo esikhundleni sokubhobozwa ngokuqondile.
Isiphetho
Kafushane: Umgomo wokuguqulwa kwe-elastomer ukuze kuthuthukiswe ukuqina kwe-spunbond nonwovens empeleni uwukuhlanganisa i-polypropylene matrix eqinile kodwa ephukayo nerabha ethambile, enwebeka kakhulu, kwakhiwe uhlelo olusebenzayo lokuhlakaza amandla ngaphakathi kwempahla.
Ngokuheha ukuhlanya, ukunqamula ukuqhekeka, kanye nokukhuthaza ukuvunwa kwe-shear ngokusebenzisa izindlela zemishini ezincane, amandla abhubhisayo (umthelela, ukuklebhula) asetshenziswa ngaphandle aguqulwa abe inani elikhulu lomsebenzi wokuguga, ongabhubhisi. Lokhu kuthuthukisa ngokukhulu ukungezwani komthelela wento, ukumelana nezinyembezi, nobude ngesikhathi sekhefu, kuguqula indwangu engalukiwe ye-spunbond isuke “entekenteke” iye “eqinile.” Lokhu kufana nokwengeza izinsimbi zensimbi kusimende, ezingagcini nje ngokukhulisa amandla kodwa, okubaluleke nakakhulu, zinikeza ukuqina okubalulekile.
I-Dongguan Liansheng Non woven Technology Co., Ltd.yasungulwa ngoMeyi 2020. Kuyibhizinisi elikhulu lokukhiqiza indwangu engalukiwe ehlanganisa ucwaningo nentuthuko, ukukhiqiza, nokudayiswa. Ingakhiqiza imibala ehlukahlukene ye-PP spunbond yezindwangu ezingalukiwe ezinobubanzi obungaphansi kwamamitha angu-3.2 ukusuka ku-9 amagremu kuya ku-300 amagremu.
Isikhathi sokuthumela: Nov-16-2025