1. Isishwankathelo se-HPMC
I-Hydroxypropyl methylcellulose (i-HPMC ngokufutshane) yinto eqhelekileyo esetyenziswa kwi-polymer yendalo, isetyenziswa ngokubanzi kulwakhiwo, iingubo, amayeza, ukutya kunye nezinye iindawo. I-HPMC ifunyenwe ngokuguqulwa kweekhemikhali zeselulosi yendalo, inonyibiliko lwamanzi kunye ne-biocompatibility, kwaye ayinyibiliki kwizinyibilikisi zendalo. Ngenxa yokunyibilika kwamanzi okugqwesileyo, ukunamathela, ukuqina, ukumiswa kunye nezinye iipropati, i-HPMC isetyenziswe ngokubanzi kwishishini lokwakha, ngakumbi ekusebenziseni i-putty powder.
2. Indima ye-HPMC kwi-putty powder
I-putty powder yimpahla yokwakha esetyenziselwa unyango eludongeni, kwaye amacandelo ayo aphambili afakela kunye nezibophelelo. I-HPMC, njenge-thickener eqhelekileyo kunye ne-ejenti yokugcina amanzi, inokuphucula ngokufanelekileyo ukusebenza kwe-putty powder, ngokukodwa kuquka le miba ilandelayo:
Ukuqina kwefuthe: I-HPMC yenza isisombululo se-colloidal emva kokunyibilika emanzini, enefuthe eliqinileyo lokuqina, inokuphucula iimpawu ze-rheological ze-putty powder, iyenze ibe ne-viscosity efanelekileyo, igweme ukuba ibhityile kakhulu xa ifaka isicelo, kwaye iphucule induduzo yokusebenza.
Ukuphucula ukusebenza kolwakhiwo: Isiphumo sokuqina kwe-HPMC asinakukwenza kuphela ukuba i-putty powder ibe yinto engaphantsi kwe-sag okanye i-drip ngexesha lenkqubo yesicelo, kodwa iphinde ikhulise ukunamathela kwe-putty powder, okwenza kube lula ukuyifaka eludongeni, ngaloo ndlela iphucula ukusebenza kakuhle kokwakhiwa.
Ukuphucula ukugcinwa kwamanzi: I-HPMC inokugcina ngokufanelekileyo amanzi kwi-putty powder kwaye icothise izinga lokunyuka kwamanzi. Oku kunokuthintela umphezulu we-putty powder ukuba wome ngokukhawuleza, uqinisekise ukusebenza kwawo ngexesha lokwakha, kwaye ugweme ukuqhekeka kunye nokuchithwa.
Ukuphucula ukubamba kunye nokugudiswa komphezulu: I-HPMC ayinako ukunyusa kuphela i-ductility ye-putty powder, kodwa iphinde iphucule i-flatness yayo yomhlaba, yenza i-putty layer igudileyo, ehambelana nemisebenzi yokupeyinta elandelayo. Ngexesha lenkqubo yokwakha, i-HPMC inokubonelela ngokuguda okungcono kunye nokunciphisa ukuveliswa kweziphene kunye namaqamza.
Ukuphucula ukuzinza kokwakhiwa: Ukongezwa kwe-HPMC kunokuphucula i-anti-precipitation ye-putty powder, ukukhusela ukufakwa kweengqungquthela ezintle kuyo, kwaye uqinisekise ukuba umgangatho kunye nokusebenza kwe-putty powder akuyi kutshintsha kakhulu ngexesha lokugcinwa kwexesha elide.
Ukuphucula ukuchasana nokuqhekeka: Ngokugcina amanzi kunye nomphumo wokuqina we-HPMC, ukuchasana kokuqhekeka kwe-putty powder kunokuphuculwa, ukuqhekeka eludongeni kunokuphetshwa, kwaye ubomi benkonzo bunokwandiswa.
3. I-viscosity efanelekileyo ye-HPMC
Impembelelo ye-HPMC kwi-putty powder ihambelana ngokusondeleyo ne-viscosity yayo. Ukukhethwa kwe-viscosity kufuneka kunqunywe ngokweemfuno ezithile ze-putty powder kunye nommandla wokwakha. Ngokuqhelekileyo, i-viscosity ye-HPMC isuka kumakhulu ukuya kwishumi lamawaka e-millipoise (mPa · s), phakathi kwayo i-viscosity eyahlukeneyo ifanelekile kwiindidi ezahlukeneyo zeputty kunye neemfuno zokwakha.
I-viscosity ephantsi ye-HPMC (malunga ne-1000-3000 mPa · s): ilungele i-putty putty ekhaphukhaphu okanye i-base putty, isetyenziswa ikakhulu kwiimeko apho kufuneka ulwelo oluphezulu. I-viscosity ephantsi ye-HPMC inokubonelela ngokusebenza okungcono kokugquma, ukwenza i-putty powder ibe lula ukusebenza, kodwa ukugcinwa kwamanzi kunye nokumelana nokuqhekeka kubuthathaka.
I-HPMC ye-viscosity ephakathi (malunga ne-3000-8000 mPa · s): ifanelekile kwiifomyula ze-putty ze-putty eziqhelekileyo, ezinokubonelela ngokugcinwa kakuhle kwamanzi kunye nokuchasana kwemvula ngelixa igcina ukumanzi okulungileyo. I-HPMC yale viscosity ayikwazi ukuhlangabezana neemfuno zokugquma ngexesha lokwakha, kodwa ikhusela ngempumelelo iingxaki ezifana nokuqhekeka kunye nokuwa.
I-viscosity ephezulu ye-HPMC (malunga ne-8000-20000 mPa·s): ilungele iileya ezishinyeneyo zomgubo weputty okanye iziganeko ezifuna isiphumo esiqinileyo sokujiya. I-viscosity ephezulu ye-HPMC inokubonelela ngokusebenza okungcono kokutyabeka kunye nozinzo, kwaye ifanelekile kwizicelo zokugquma ezifuna ukubamba okuqinileyo kunye nokuguda, kodwa kufuneka kuqatshelwe ukuba i-viscosity ephezulu kakhulu inokubangela ukuba i-putty powder ibe yi-viscous kakhulu kwaye ichaphazele umsebenzi wokwakha.
Kwizicelo eziphathekayo, i-viscosity ye-HPMC efanelekileyo kufuneka ikhethwe ngokwemeko yokusetyenziswa kunye nendlela yokwakha ye-putty powder. Umzekelo, xa umphezulu wodonga urhabaxa ngokwentelekiso okanye ulwakhiwo oluninzi luyafuneka, i-viscosity ephezulu ye-HPMC inokukhethwa ukuba iphucule ukubambelela kunye nokumelana nokuqhekeka kwengubo; ngelixa kwizihlandlo ezifuna ulwelo oluphezulu kunye nokwakhiwa ngokukhawuleza, i-viscosity ephantsi ukuya ephakathi HPMC inokukhethwa.
IHydroxypropyl methylcellulosesisongezo sesakhiwo esibalulekileyo esinokuphucula kakhulu ukusebenza kolwakhiwo, ukugcinwa kwamanzi, ukunamathela kunye nokumelana nokuqhekeka kwe-putty powder. Ukukhetha i-viscosity ye-HPMC efanelekileyo ibalulekile ekusebenziseni i-putty powder. Ii-viscosities ezahlukeneyo zinokuhlengahlengiswa ngokohlobo lwe-putty powder, indawo yokwakha, kunye neemfuno zokusebenza. Kwimveliso yangempela kunye nokwakhiwa, ukulawula i-viscosity ye-HPMC inokufikelela kwimiphumo efanelekileyo yokwakha kunye nokusebenza kwexesha elide. Ngoko ke, ngokweemfuno ezahlukeneyo zokwakha, ukukhetha ngokufanelekileyo kunye nokulungelelanisa i-viscosity ye-HPMC linyathelo elibalulekileyo lokuqinisekisa ukusebenza kunye nomgangatho we-putty powder.
Ixesha lokuposa: Mar-25-2025