1. Inombolo ye-Viscosity
Inombolo ye-viscosity ibonisa isisindo se-molecule ye-resin futhi iyisici esiyinhloko sokunquma uhlobo lwe-resin. Izakhiwo kanye nokusetshenziswa kwe-resin kuyahlukahluka kuye ngokuthi i-viscosity. Njengoba idigri ye-polymerization ye-PVC resin ikhula, izakhiwo zemishini ezifana namandla aqinile, amandla omthelela, amandla okuphuka, nobude ngesikhathi sekhefu, kuyilapho amandla esivuno ehla. Imiphumela yocwaningo ikhombisa ukuthi njengoba izinga le-polymerization yezinsiza zokucubungula ze-PVC landa, izakhiwo eziyisisekelo ze-resin ziyathuthuka, kuyilapho ukusebenza kokucubungula kanye nokuziphatha kwe-rheological kuwohloka. Kungabonakala ukuthi ukusatshalaliswa kwesisindo samangqamuzana e-PVC resin kunobudlelwane obuseduze nokucubungula kwepulasitiki nokusebenza komkhiqizo.
2. Isibalo sezinhlayiyana zokungcola (amachashazi amnyama naphuzi)
Izinhlayiya zokungcola zingenye yezinkomba ezibalulekile zokuhlola i-PVC resin. Izici eziyinhloko ezithinta le nkomba yilezi: okokuqala, izinto ezisele odongeni lokumboza lweketela le-polymerization azihlanzwa kahle futhi izinto ezingavuthiwe zingcoliswe ukungcola; okwesibili, ukugqokwa kwemishini okuxubene nokungcola nokusebenza okungafanele okuletha ukungcola; Enqubweni yokucubungula ipulasitiki, uma kunezinhlayiya eziningi zokungcola, kuzoba nemiphumela emibi ekusebenzeni nasekusetshenzisweni kwemikhiqizo ye-PVC ekhiqizwayo. Isibonelo, ekucubunguleni nasekubunjweni kwamaphrofayili, kukhona ukungcola okuningi nezinhlayiya, ezingabangela amabala avele ebusweni bephrofayili, ngaleyo ndlela kunciphise umphumela wokubukeka komkhiqizo. Ngaphezu kwalokho, ngenxa yokungafakwa kwepulasitiki kwezinhlayiya zokungcola noma amandla aphansi naphezu kwe-plasticization, izakhiwo zemishini yomkhiqizo ziyancipha.
3. Ama-Volatiles (kuhlanganise namanzi)
Le nkomba ibonisa ukwehla kwesisindo se-resin ngemva kokushiswa ezingeni elithile lokushisa. Okuqukethwe okuphansi kwezinto eziguquguqukayo kungenza kalula ugesi omile, ongahambisani nokusebenza kokuphakela ngesikhathi sokucubungula nokubunjwa; Uma okuqukethwe okuguquguqukayo kuphezulu kakhulu, inhlaka ijwayele ukunqwabelana futhi ingabi namanzi kahle, futhi amabhamuza akhiqizwa kalula phakathi nokubunjwa nokucutshungulwa, okunomthelela omubi kukhwalithi yomkhiqizo.
4. Ukuminyana okusobala
Ukuminyana okusobala yisisindo seyunithi ngayinye ye-PVC resin powder empeleni engacindezelwanga. Ihlobene ne-particle morphology, isilinganiso sosayizi wezinhlayiyana, nokusabalalisa usayizi wezinhlayiyana we-resin. Ukuminyana okubonakalayo okuphansi, umthamo omkhulu, ukumuncwa okusheshayo kwama-plasticizers, nokucubungula kalula. Ngokuphambene, isilinganiso esiphezulu sosayizi wezinhlayiyana kanye nevolumu encane kuholela ekumunceni izinsiza zokucubungula ze-PVC. Ukuze kukhiqizwe imikhiqizo eqinile, imfuneko yesisindo samangqamuzana ayiphezulu, futhi ama-plasticizers ngokuvamile awangeziwe ngesikhathi sokucubungula. Ngakho-ke, i-porosity yezinhlayiya ze-resin iyadingeka ukuba ibe ngaphansi, kodwa kunesidingo sokugeleza okomile kwe-resin, ngakho-ke ukuminyana okubonakalayo kwe-resin kuphakeme ngokuhambisanayo.
5. Ukumuncwa kwe-Plasticizer kwe-resin
Inani lokumuncwa lezinsiza zokucubungula ze-PVC libonisa izinga lezimbotshana ezingaphakathi kwezinhlayiya ze-resin, ngezinga eliphezulu lokumunca uwoyela kanye ne-porosity enkulu. I-resin imunca ama-plasticizers ngokushesha futhi inokusebenza okuhle kokucubungula. Ngokubunjwa kwe-extrusion (njengamaphrofayili), nakuba imfuneko ye-resin porosity ingephezulu kakhulu, ama-pores ngaphakathi kwezinhlayiya anomphumela omuhle we-adsorption ekungezeni izithasiselo ngesikhathi sokucubungula, okukhuthaza ukusebenza kahle kwezithasiselo.
6. Ubumhlophe
Ubumhlophe bubonisa ukubukeka nombala we-resin, kanye nokuwohloka okubangelwa ukuzinza okuphansi kokushisa noma isikhathi sokugcinwa isikhathi eside, okuholela ekwehleni okukhulu kobumhlophe. Izinga lobumhlophe linomthelela omkhulu ekumelaneni nokuguga kwezihlahla nemikhiqizo.
7. Okuqukethwe okusele kwe-vinyl chloride
Izinsalela ze-VCM zisho ingxenye yenhlaka engakakhangiswa noma ehlakazwe ku-polyethylene monomer, futhi umthamo wayo wokukhangisa uyahluka kuye ngohlobo lwe-resin. Ezicini zangempela zezinsalela ze-VCM, izici eziyinhloko zihlanganisa izinga lokushisa eliphansi eliphezulu lombhoshongo wokuhlubula, umehluko omkhulu wengcindezi embhoshongweni, kanye ne-morphology yezinhlayiya ze-resin ezimbi, konke okungathinta ukuchithwa kwezinsalela ze-VCM, okuyinkomba yokulinganisa izinga lenhlanzeko. izinhlaka. Emikhiqizweni ekhethekile, njengezikhwama ze-tin foil ezibonisa ngale zefilimu yezokwelapha, okuqukethwe kwe-VCM okusele kwenhlaka akukho ezingeni elijwayelekile (ngaphansi kuka-5PPM).
8. Ukuzinza okushisayo
Uma okuqukethwe kwamanzi ku-monomer kuphezulu kakhulu, kuzokhiqiza i-asidi, kugqwese okokusebenza, kwakhiwe uhlelo lwe-iron polymerization, futhi ekugcineni kuthinte ukuzinza kokushisa komkhiqizo. Uma i-hydrogen chloride noma i-chlorine yamahhala ikhona ku-monomer, izoba nemiphumela emibi ekuphenduleni kwe-polymerization. I-Hydrogen chloride ijwayele ukwakheka emanzini, okunciphisa inani le-pH ye-polymerization system futhi kuthinte ukuzinza kwesistimu ye-polymerization. Ngaphezu kwalokho, okuqukethwe okuphezulu kwe-acetylene ku-monomer yomkhiqizo kuthinta ukuzinza okushisayo kwe-PVC ngaphansi komphumela we-synergistic we-acetaldehyde nensimbi, othinta ukusebenza kokucubungula komkhiqizo.
9. Izinsalela zesisefo
Izinsalela zesisefo zibonisa izinga losayizi wezinhlayiyana ezingalingani ze-resin, futhi izici zayo eziyinhloko ezithonya inani le-dispersant kufomula ye-polymerization kanye nomphumela onyakazayo. Uma izinhlayiya ze-resin zimaholoholo noma zizinhle kakhulu, zizothinta izinga le-resin futhi zibe nomthelela ekucutshungulweni okulandelayo komkhiqizo.
10. “Iso Lenhlanzi”
“Iso lezinhlanzi”, elaziwa nangokuthi i-crystal point, libhekisela ezinhlayiyeni ze-resin esobala ezingazange zenziwe ipulasitiki ngaphansi kwezimo ezijwayelekile zokucubungula i-thermoplastic. Umthelela ekukhiqizeni kwangempela. Isici esiyinhloko "so iso lezinhlanzi" siwukuthi lapho okuqukethwe kwezinto eziphezulu ezibilayo ku-monomer kuphezulu, kuncibilikisa i-polymer ngaphakathi kwezinhlayiya ngesikhathi senqubo ye-polymerization, inciphisa i-porosity, yenza izinhlayiya zibe nzima, futhi ibe "inhlanzi yesikhashana." iso" ngesikhathi sokucubungula i-plasticization. Umqalisi usatshalaliswa ngokungalingani kumaconsi kawoyela we-monomer. Kusistimu ye-polymerization enokudlulisa ukushisa okungalingani, ukwakheka kwe-resin enesisindo samangqamuzana esingalingani, noma ukungcola kwe-reactor ngesikhathi sokuphakelwa, insalela esele, noma ukunamathela ngokweqile kwento esabelayo kungabangela "i-fisheye". Ukwakhiwa "kwamehlo ezinhlanzi" kuthinta ngokuqondile ikhwalithi yemikhiqizo ye-PVC, futhi ekucubunguleni okulandelayo, kuzothinta ubuhle bobuso bemikhiqizo. Izophinde inciphise kakhulu izici zemishini ezifana namandla aqinile kanye nobude bemikhiqizo, okungaholela kalula ekubhobhozweni kwamafilimu noma amashidi epulasitiki, ikakhulukazi imikhiqizo yamakhebula, okuzothinta izakhiwo zawo zokuvala ugesi. Ingenye yezinkomba ezibalulekile ekukhiqizeni i-resin kanye nokucubungula i-plasticization.
Isikhathi sokuthumela: Jun-12-2024
