Isingeniso se-Hydroxypropyl Methylcellulose (HPMC)
I-Hydroxypropyl methylcellulose, evame ukwaziwa nge-HPMC, iphuma ku-cellulose eguqulwe isuka ku-cellulose yemvelo.Isetshenziswa kabanzi kwezokwakha, ezemithi, ezokudla nezinye izimboni, ikakhulukazi embonini ye-PVC.I-compound iyimpushana emhlophe, engenaphunga enokuncibilika kwamanzi okuhle kakhulu kanye nohlu lwezakhiwo zomzimba namakhemikhali ezenza ifanelekele ukusetshenziswa okuhlukahlukene.
Izici ezithuthukisiwe ze-rheological:
Omunye weminikelo emikhulu ye-HPMC embonini ye-PVC umthelela wayo ezimpahleni ze-rheological.Isebenza njenge-rheology modifier, ethinta ukugeleza nokuguqulwa kwamakhompiyutha e-PVC ngesikhathi sokucubungula.Lokhu kubaluleke kakhulu kuzinqubo zokubumba ze-extrusion kanye nomjovo.
Thuthukisa ukunamathela kwe-PVC:
I-HPMC yaziwa ngekhono layo lokuthuthukisa ukunamathela, okusho ukuthi embonini ye-PVC kusho ukuhlangana okungcono phakathi kwezinhlanganisela ze-PVC nezinye izinto.Lokhu kubaluleke kakhulu ekukhiqizeni izinhlanganisela ze-PVC nezixube, lapho ukunamathela okuqinile kobuso kubalulekile ekusebenzeni kahle.
Ukugcinwa kwamanzi nokuzinza:
Ekwenziweni kwe-PVC, kubalulekile ukugcina okuqukethwe kwamanzi kumazinga athile ngesikhathi sokucubungula.I-HPMC isebenza njenge-ejenti egcina amanzi, ivimbela ukoma ngaphambi kwesikhathi futhi iqinisekise amazinga amanzi angashintshi.Lokhu kubaluleke kakhulu ekusetshenzisweni lapho isimo se-hydration ye-PVC compound sithinta izakhiwo zomkhiqizo wokugcina.
Izinhlelo zokusebenza ezilawulwayo zokukhishwa:
I-HPMC ivamise ukusetshenziswa kanye ne-PVC ekwakhiweni kokukhishwa okulawulwayo.Lokhu kuvamile ekusetshenzisweni kwezolimo lapho izinhlelo ze-PVC zisetshenziselwa ukulawula ukukhululwa komanyolo noma izibulala-zinambuzane.Izici eziqhubekayo nezibikezeleka zokuqedwa ze-HPMC zisiza ukukhululwa okulawulwayo.
Umthelela kuzakhiwo zefilimu ye-PVC:
Ukwengeza i-HPMC ekwakhiweni kwe-PVC kungathinta izici zefilimu ewumphumela.Lokhu kuhlanganisa izici ezifana nokuguquguquka, ukukhanya namandla okusebenza.Ngokuya ngezidingo ezithile zomkhiqizo wokugcina, i-HPMC ingenziwa ngendlela oyifisayo ukunikeza ifilimu ye-PVC izakhiwo ezifiselekayo.
Izinga lokushisa kanye nokumelana ne-UV:
Imikhiqizo ye-PVC ivame ukudingeka ukuze imelane nezimo ezihlukahlukene zemvelo.I-HPMC ithuthukisa ukusebenza okuphelele kwe-PVC ngokwandisa ukumelana kwayo nezinga lokushisa kanye nemisebe ye-UV.Lokhu kubaluleke kakhulu ezinhlelweni zokusebenza zangaphandle lapho i-PVC ichayeka ekukhanyeni kwelanga kanye nesimo sezulu.
Ama-binder nama-ejenti amisiwe:
I-HPMC isetshenziswa njenge-binder ekwakhiweni kwe-PVC, isiza ekuhlanganeni kwezinhlayiyana futhi ikhuthaze ukwakheka kwezigaxa ezifanayo.Ukwengeza, isebenza njenge-ejenti yokumisa, ivimbela izinhlayiya ukuthi zingahlali futhi ziqinisekise ukusatshalaliswa okufanayo ngaphakathi kwe-matrix ye-PVC.
Lungiselela isilinganiso seresiphi:
Ukusebenza kwe-HPMC ezinhlelweni ze-PVC kuvame ukuncika ekulinganisweni kokwakhiwa.Ukulinganisa ukugxila kwe-HPMC nezinye izithasiselo kanye ne-PVC resin kubalulekile ekuzuzeni izici ezifiselekayo zomkhiqizo wokugcina.
Ukuhambisana nezinye izithasiselo:
Ukuhambisana nezinye izithasiselo, ama-plasticizers neziqinisi kuyisici esibalulekile sokufaka i-HPMC ekwakhekeni kwe-PVC.Ukuqinisekisa ukuthi i-HPMC isebenzisana ngokuhlanganyela nezinye izingxenye kubalulekile ekugcineni ukusebenza okuphelele nokuzinza kwenhlanganisela ye-PVC.
Izimo zokucubungula:
Izimo zokucubungula, okuhlanganisa izinga lokushisa kanye nokucindezela ngesikhathi sokukhipha noma ukubumba, kungathinta ukusebenza kahle kwe-HPMC.Ukuqonda ukuzinza okushisayo kanye nezidingo zokucubungula ze-HPMC kubalulekile ekwandiseni inqubo yokukhiqiza.
Ekuphetheni
Kafushane, i-hydroxypropyl methylcellulose idlala indima ehlukahlukene embonini ye-PVC, isiza ukuthuthukisa izici zokucubungula, ukunamathela, ukugcinwa kwamanzi kanye nokusebenza okuphelele kwemikhiqizo esekelwe ku-PVC.Njengoba imboni iqhubeka nokuvela, izakhiwo ezihlukile ze-HPMC cishe zizoqhubeka nokusetshenziswa ezinhlelweni ezintsha nasekuthuthukisweni kobuchwepheshe be-PVC.Njengoba abacwaningi nabakhiqizi bejula ekusebenzisaneni phakathi kwe-HPMC ne-PVC, amandla okwakhiwa okusha kanye nemikhiqizo ye-PVC ethuthukisiwe makhulu kakhulu.
Isikhathi sokuthumela: Dec-12-2023