Kwinkqubo yokuvelisa ilaphu le-spunbond nonwoven, izinto ezahlukeneyo zinokuchaphazela iipropati ezibonakalayo zemveliso. Ukuhlalutya ubudlelwane phakathi kwezi zinto kunye nokusebenza kwemveliso kunokunceda ukulawula ngokuchanekileyo iimeko zenkqubo kunye nokufumana umgangatho ophezulu kunye nokusebenza ngokubanzi kweemveliso zelaphu ze-polypropylene spunbond ezingalukwanga. Apha, siza kuhlalutya ngokufutshane ezona zinto ziphambili ezinempembelelo kwiimpawu ezibonakalayo ze-spunbond nonwoven fabrics kwaye sabelane nabo bonke abantu.
Isalathisi se-Melt kunye nokusabalalisa ubunzima be-molecular of polypropylene slices
Iimpawu eziphambili zomgangatho we-polypropylene slices zinobunzima be-molecular weight, i-molecular weight distribution, i-isotropy, i-melt index, kunye nomxholo womlotha. Ubunzima bemolekyuli yeetshiphusi zePP ezisetyenziselwa ukusonta buphakathi kwe-100000 kunye ne-250000, kodwa uqheliselo lubonise ukuba iimpawu ze-rheological zokunyibilika zingcono xa ubunzima bemolekyuli bepolypropylene bujikeleze i-120000, kwaye isantya esiphezulu esivumelekileyo sokujikeleza siphezulu. Isalathisi sokunyibilika yiparameter ebonisa iimpawu ze-rheological zokunyibilika, kunye nesalathisi sokunyibilika kwee-polypropylene izilayi ezisetyenziswe kwi-spunbond ngokuqhelekileyo phakathi kwe-10 kunye ne-50. Kwinkqubo yokujikeleza kwi-web, i-filament ifumana kuphela idrafti enye yokuhamba komoya, kwaye umlinganiselo wedrafti we-filament ulinganiselwe yi-rheological properties of melt. Ubukhulu be-molecular weight, oko kukuthi, i-index index ye-melted encinci, i-flowability embi kakhulu, kunye nencinci i-draft ratio efunyenwe yi-filament. Phantsi kweemeko ezifanayo zokunyibilika kwe-ejection ukusuka kwi-nozzle, ubungakanani befayibha yefilamenti efunyenweyo nayo inkulu, ibangela ukuvakala kwesandla esinzima kwi-spunbond nonwoven fabrics. Ukuba isalathisi sokunyibilika siphezulu, i-viscosity ye-melt iyancipha, iimpawu ze-rheological zilungile, ukuchasana nokwelula kuyancipha, kwaye phantsi kweemeko ezifanayo zokwelula, umlinganiselo wokwelula uyanda. Njengoko iqondo lokuqhelaniswa ne-macromolecules lisanda, amandla okuqhekezwa kwelaphu le-spunbond nonwoven nalo liya kwanda, kwaye ukucoleka kweefilaments kuya kuncipha, okukhokelela kwimvakalelo ethambileyo yesandla selaphu. Ngaphantsi kwenkqubo efanayo, iphezulu isalathisi sokunyibilika kwe-polypropylene, incinci i-fineness yayo kwaye inkulu amandla ayo okuphuka.
Ukuhanjiswa kobunzima bemolekyuli kudla ngokulinganiswa ngomlinganiselo wobunzima bobunzima bemolekyuli (Mw) ukuya kwinani eliphakathi kobunzima bemolekyuli (Mn) yepolymer (Mw/Mn), eyaziwa ngokuba yi-molecular weight distribution value. Ixabiso elincinci le-molecular weight distribution value, lizinzile ngakumbi iimpawu ze-rheological zokunyibilika, kunye nokuzinza kwenkqubo yokujikeleza, ekhuthaza ukuphucula isantya sokujikeleza. Ikwanayo nokunyibilika okusezantsi kunye nokuqina kwe-viscosity, enokunciphisa uxinzelelo lokujikeleza, yenza iPP ibe lula ukuyolula kwaye ibe ntle, kwaye ifumane imicu ecolekileyo. Ngaphezu koko, ukufana kwenethiwekhi kulungile, kunye nokuvakalelwa kakuhle kwesandla kunye nokufana.
Ubushushu bokujikeleza
Ukumiselwa kobushushu obujikelezayo buxhomekeke kwisalathiso sokunyibilika kwezinto ezikrwada kunye neemfuno zeempawu ezibonakalayo zemveliso. Ukuphakama kwesalathiso sokunyibilika kwezinto ezikrwada, kokukhona kuphezulu ubushushu obujikelezayo, kwaye ngokuphambeneyo. Iqondo lokushisa elijikelezayo lihambelana ngqo ne-viscosity ye-melt, kwaye iqondo lokushisa liphantsi. I-viscosity ye-melt iphezulu, yenza ukujikeleza kunzima kwaye kukulungele ukuvelisa iifayili eziphukileyo, eziqinileyo okanye ezinqabileyo, ezichaphazela umgangatho wemveliso. Ngoko ke, ukuze kuncitshiswe i-viscosity yokunyibilika kunye nokuphucula iimpawu zayo ze-rheological, indlela yokwandisa ubushushu iyamkelwa ngokubanzi. Ubushushu obujikelezayo bunempembelelo ebalulekileyo kwisakhiwo kunye neempawu zemicu. Iqondo eliphantsi lobushushu obujikelezayo, ukuphakama kwe-viscosity eyolulayo yokunyibilika, ukuchasana okukhulu, kwaye kunzima ukunweba i-filament. Ukufumana imicu yokucoleka okufanayo, isantya sokuhamba komoya esolula kufuneka sibe phezulu kakhulu kumaqondo obushushu aphantsi. Ngoko ke, phantsi kweemeko zenkqubo efanayo, xa ukushisa kwe-spinning kuphantsi, iifibers zinzima ukuzolula. I-fiber ine-fineness ephezulu kunye ne-low orientation ye-molecular, ebonakaliswa kwi-spunbond ye-nonwoven fabrics enamandla aphantsi okuqhawula, ukuphakama okuphezulu ngexesha lokuphumla, kunye nokuvakalelwa kwesandla esinzima; Xa iqondo lobushushu elijikelezayo liphezulu, ukolulwa kwefayibha kungcono, ukucoleka kwefayibha kuncinci, kwaye i-molecular orientation iphezulu. Oku kubonakala kumandla aphezulu okuqhawuka, ukophuka okuncinci kobude, kunye nokuvakala kwesandla esithambileyo samalaphu a-spunbond angalukwanga. Nangona kunjalo, kuyafaneleka ukuba uqaphele ukuba phantsi kweemeko ezithile zokupholisa, ukuba ukushisa kwe-spinning kuphezulu kakhulu, i-filament ebangelwayo ayiyi kupholisa ngokwaneleyo ngexesha elifutshane, kwaye ezinye iifayili zinokuphuka ngexesha lenkqubo yokwelula, enokuthi yenze iziphene. Kwimveliso yokwenyani, ubushushu bokujikeleza kufuneka bukhethwe phakathi kwe-220-230 ℃.
Ukupholisa ukubumba iimeko
Umyinge wokupholisa we-filament unempembelelo ebalulekileyo kwiimpawu ezibonakalayo ze-spunbond nonwoven fabric ngexesha lenkqubo yokwenza. Ukuba i-polypropylene etyhidiweyo inokucoliswa ngokukhawuleza kwaye ifakwe ngokufanayo emva kokuphuma kwi-spinneret, izinga layo le-crystallization liyacotha kwaye i-crystallinity iphantsi. Ukwakhiwa kwefiber okubangelwa yi-disc-shaped-shaped liquid crystal structure, enokufikelela kumlinganiselo omkhulu wokwelula ngexesha lokwelula. Ukuqhelaniswa kwamatyathanga e-molecular kungcono, okunokwandisa ngakumbi i-crystallinity, ukuphucula amandla efiber, kunye nokunciphisa ubude bayo. Oku kubonakala kumalaphu e-spunbond angalukwanga anamandla aphezulu okuqhekeka kunye nobude obuphantsi; Ukuba ipholile ngokukhawuleza, iifayili ezibangelwayo zinesakhiwo esizinzile sekristale ye-monoclinic, engafanelekanga kwi-fiber stretching. Oku kubonakaliswa kumalaphu angalukwanga e-spunbond anamandla asezantsi okuqhekeka kunye nobude obukhulu. Ke ngoko, kwinkqubo yokubumba, ukonyusa umthamo womoya wokupholisa kunye nokunciphisa ubushushu begumbi lokusonta kudla ngokusetyenziswa ukuphucula amandla okuqhekeka kunye nokunciphisa ubude be-spunbond amalaphu angalukwanga. Ukongezelela, umgama wokupholisa we-filament uhambelana ngokusondeleyo nokusebenza kwayo. Kwimveliso yamalaphu e-spunbond angalukwanga, umgama wokupholisa ukhethwa ngokubanzi phakathi kwe-50-60cm.
Iimeko zokuzoba
Ukuqhelaniswa namatyathanga eemolekyuli kwimisonto yesilika yinto ebalulekileyo echaphazela ukomelela kunye nobude bokuqhawuka kwemicu enye. Okukhona iqondo lokuqhelaniswa likhulu, kokukhona uqina umcu omnye kwaye usiba luncinci ulwando ngexesha lekhefu. Iqondo lokuqhelaniswa linokumelwa yi-birefringence ye-filament, kwaye ixabiso elikhulu, liphezulu iqondo lokuqhelaniswa. Iintsinga eziphambili ezenziwe xa i-polypropylene inyibilika iphuma kwi-spinneret ine-crystallinity ephantsi kunye ne-orientation, i-fiber brittleness ephezulu, i-fracture elula, kunye nobude obalulekileyo ngexesha lekhefu. Ukutshintsha iimpawu zeentsinga, kufuneka zolulwe ukuya kumaqondo ahlukeneyo njengoko kufuneka ngaphambi kokuba zenze iwebhu. Kwiimveliso yespunbond, ukomelela kwefiber ubukhulu becala kuxhomekeke kubungakanani bomthamo womoya opholileyo kunye nomthamo womoya wokufunxa. Ubukhulu bomthamo womoya wokupholisa kunye nokufunxa, ngokukhawuleza isantya solula, kunye nemicu iya kwandiswa ngokupheleleyo. I-molecular orientation iya kwanda, i-fineness iya kuba ngcono, amandla aya kwanda, kwaye i-elongation ngexesha lekhefu iya kuncipha. Ngesantya esijikelezayo se-4000m / min, i-polypropylene filament ifikelela kwixabiso layo le-saturation ye-birefringence, kodwa kwinkqubo yokwelula komoya yokujikeleza kwiwebhu, isantya sangempela se-filament ngokuqhelekileyo kunzima ukudlula i-3000m / min. Ngoko ke, kwiimeko apho iimfuno ezinamandla ziphezulu, isantya esilula sinokunyuswa ngesibindi. Nangona kunjalo, phantsi kwemeko yomthamo womoya wokupholisa rhoqo, ukuba umthamo womoya wokufunxa mkhulu kakhulu kwaye ukupholisa kwe-filament akwanelanga, iifayili zivame ukuphuka kwindawo ye-extrusion yokufa, ebangela umonakalo kwintloko yokutofa kunye nokuchaphazela imveliso kunye nomgangatho wemveliso. Ngoko ke, uhlengahlengiso olufanelekileyo kufuneka lwenziwe kwimveliso yangempela.
Iimpawu ezibonakalayo ze-spunbond nonwoven fabrics azihambelani kuphela neempawu zemicu, kodwa kunye nesakhiwo sothungelwano semicu. Okukhona imicu iphucukile, iqondo eliphezulu lokuphazamiseka kulungiselelo lweentsinga xa ubeka umnatha, kokukhona umnatha ufanayo, kokukhona kukho iintsinga ezininzi kwindawo nganye yeyunithi, kokukhona umlinganiselo wokomelela obude kunye noguquguqukayo womnatha, kwaye kokukhona kunamandla okuqhawuka. Ngoko ke kuyenzeka ukuphucula ukufana kweemveliso zelaphu ezingalukwanga zespunbond kunye nokwandisa amandla azo okuqhawuka ngokwandisa umthamo womoya wokufunxa. Nangona kunjalo, ukuba umthamo womoya wokufunxa mkhulu kakhulu, kulula ukubangela ukuphuka kwecingo, kwaye ukolula kunamandla kakhulu. I-orientation ye-polymer ithande ukugqitywa, kwaye i-crystallinity ye-polymer iphezulu kakhulu, eya kunciphisa amandla empembelelo kunye nobude ngexesha lekhefu, ikhulise i-brittleness, kwaye ngaloo ndlela ikhokelele ekunciphiseni amandla kunye nobude belaphu elingalukwanga. Ngokusekwe koku, kunokubonwa ukuba ukomelela kunye nokwandiswa kwamalaphu e-spunbond nonwoven ayanda kwaye ayancipha rhoqo ngokunyuka komthamo womoya wokufunxa. Kwimveliso yangempela, kuyimfuneko ukulungelelanisa inkqubo ngokufanelekileyo ngokweemfuno kunye nemeko yangempela ukuze ufumane iimveliso eziphezulu.
Iqondo lobushushu elishushu
I-fiber web eyenziwe ngokuzolula iintsinga zikwimo ekhululekileyo kwaye kufuneka ishushu-isolwe kwaye ibotshwe ukuze ibe lilaphu. I-Hot rolling bonding yinkqubo apho imicu ekwiwebhu ithe yathamba ngokuyinxenye kwaye inyibilikiswa yimiqulu eshushu eqengqelekayo ngoxinzelelo oluthile kunye nobushushu, kwaye imicu idityaniswe kunye ukuze yenze ilaphu. Into ephambili kukulawula ubushushu kunye noxinzelelo kakuhle. Umsebenzi wokufudumeza kukuthambisa kunye nokunyibilikisa imicu. Umyinge wemicu ethambileyo kunye nenyibilikisiweyo imisela iimpawu ezibonakalayo zeamalaphu e-spunbond angalukwanga. Kumaqondo obushushu aphantsi kakhulu, kuphela inxalenye encinci yeentsinga ezinobunzima obuphantsi bemolekyuli iyathamba kwaye inyibilike, kwaye kukho iintsinga ezimbalwa kakhulu ezidityaniswe kunye phantsi koxinzelelo. Iintsinga ezikwiwebhu yefiber zithande ukutyibilika, kwaye amalaphu angalukwanga anamandla asezantsi okuqhawuka kodwa ubude obukhulu. Imveliso ivakalelwa kukuba ithambile kodwa ithande ukuxubha; Njengoko iqondo lobushushu elishushu linyuka ngokuthe ngcembe, inani leentsinga ezithambileyo nezinyibilikisiweyo liyenyuka, i-fiber web bond iya ibaqina, iintsinga azifane zityibilike, ukomelela kwelaphu elingalukwanga liyanda, kwaye ubude busemkhulu ngokwentelekiso. Ngaphezu koko, ngenxa yobudlelwane obuluqilima phakathi kwemicu, ulwandiso luyanda kancinci; Xa iqondo lobushushu linyuka kakhulu, uninzi lwefiber kwindawo yoxinzelelo luyanyibilika, kwaye iifibers ziba ngamaqhuma anyibilikayo, aqale ukuba brittle. Ngeli xesha, amandla endwangu engalukiweyo aqala ukuhla, kwaye i-elongation iyancipha kakhulu. Isandla sivakala siqinile kwaye sishwabene, kwaye amandla eenyembezi nawo aphantsi. Ukongeza, iimveliso ezahlukeneyo zinobunzima obuhlukeneyo kunye nobukhulu, kwaye ukusetwa kweqondo lobushushu le-hot rolling mill nako kuyahluka. Kwiimveliso ezibhityileyo, kukho iintsinga ezimbalwa kwindawo eshushu yokuqengqeleka, kwaye ubushushu obuncinci bufunekayo ukuze kuthambe kwaye kunyibilike, ngoko ke ubushushu obufunekayo buphantsi. Ngokuhambelanayo, kwiimveliso ezishinyeneyo, imfuno yobushushu obuqengqelekayo iphezulu.
Uxinzelelo olushushu oluqengqelekayo
Kwinkqubo yebhondi eshushu yokuqengqeleka, indima yoxinzelelo lomgca wokusila kukudibanisa i-fiber web, ibangela ukuba imicu kwiwebhu ingene kubushushu obuthile obuguquguqukayo kwaye isebenzise ngokupheleleyo isiphumo sokuqhuba ubushushu ngexesha lenkqubo eshushu yokuqengqeleka, ukwenza imicu ethambileyo nenyibilikisiweyo idityaniswe ngokuqinileyo kunye, inyusa amandla okuncamathela phakathi kwemicu, kwaye yenze kube nzima kwimicu. Xa uxinzelelo lomgca wokuqengqeleka oshushu lusezantsi ngokwentelekiso, ukuxinana kwefiber compaction kwindawo yoxinzelelo kwi-fiber web ihlwempuzekile, amandla okubopha ifayibha awekho phezulu, amandla okubamba phakathi kwemicu ahlwempuzekile, kwaye imicu kulula ukutyibilika. Ngeli xesha, ukuva kwesandla kwelaphu elingaphothiweyo elingaphothiweyo lithambile ngokwentelekiso, ukuqhekeka kobude bukhulu ngokwentelekiso, kwaye ukomelela kokwaphuka kuphantsi ngokwentelekiso; Ngokuchasene noko, xa uxinzelelo lomgca luphezulu ngokwentelekiso, isiphumo selaphu le-spunbond esingalukwanga sinoluvo olunzima lwesandla, ubude obusezantsi ngexesha lekhefu, kodwa ukophuka okukhulu ukomelela. Nangona kunjalo, xa uxinzelelo lomgca we-hot rolling mill luphezulu kakhulu, i-polymer ethambileyo kunye neyinyibilikisiwe kwindawo eshushu yokuqengqeleka ye-fiber web kunzima ukuhamba kwaye isasazeke, ekwanciphisa ukunyanzeliswa kokuqhekeka kwelaphu elingalukwanga. Ukongeza, ukusetwa koxinzelelo lomgca kuhambelana ngokusondeleyo nobunzima kunye nobukhulu belaphu elingalukwanga. Kwimveliso, ukhetho olufanelekileyo kufuneka lwenziwe ngokweemfuno ukwenzela ukuvelisa iimveliso ezihlangabezana neemfuno zokusebenza.
Isishwankathelo, iipropati zomzimba kunye nezomatshini zeilaphu le-polypropylene spunbond elingalukwangaiimveliso azigqitywanga yinto enye, kodwa ngemiphumo edibeneyo yezinto ezahlukeneyo. Kwimveliso yokwenyani, iiparamitha zenkqubo efanelekileyo kufuneka zikhethwe ngokweemfuno zokwenyani kunye neemeko zemveliso ukuze kuveliswe iimveliso zelaphu ezikumgangatho ophezulu we-spunbond ezingalukwanga ezinokuhlangabezana neemfuno ezahlukeneyo. Ukongeza, ulawulo olungqongqo olusemgangathweni lomgca wemveliso, ukugcinwa ngononophelo kwezixhobo, kunye nokuphuculwa komgangatho kunye nobuchule babaqhubi zizinto eziphambili ekuphuculeni umgangatho wemveliso.
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: Nov-29-2024