Ingabe I-Shrinkage Cracking Kakhonkolo Ihlobene ne-Hydroxypropyl Methylcellulose(HPMC)?

Ukuqhekeka kwe-shrinkage kuyindaba evamile ekwakhiweni kukakhonkolo futhi kungenzeka ngenxa yezizathu ezahlukahlukene. Enye yezimbangela ezingaba khona zokuqhekeka kokhonkolo ukusetshenziswa kwe-hydroxypropyl methylcellulose (HPMC) njengesithako. I-HPMC ivame ukusetshenziswa kukhonkolo ukuze kuthuthukiswe ukusebenza, ukugcinwa kwamanzi, nokuthuthukiswa kwamandla. Kodwa-ke, ukusetshenziswa kwe-HPMC kungaholela ekuqhekekeni kokhonkolo ngaphansi kwezimo ezithile.

Isizathu esiyinhloko sokushwabana kukakhonkolo ngenxa ye-HPMC ukwehla kwezinga lokulahleka kwamanzi. I-HPMC iyi-ejenti egcina amanzi esebenzayo futhi inganciphisa kakhulu izinga lokulahlekelwa kwamanzi kusuka kusimende esisha. Nokho, amanzi agciniwe akhululwa kancane kancane ngokuhamba kwesikhathi, okuholela ekuncipheni nasekuqhekekeni okulandelayo kukakhonkolo.

Ngaphezu kwalokho, izakhiwo ze-HPMC, njengesisindo sayo samangqamuzana, izinga lokushintshwa, nokugxilisa ingqondo, zingathinta nokuqhekeka kokhonkolo. I-HPMC enesisindo samangqamuzana aphezulu kanye nezinga lokushintsha inganikeza ukugcinwa kwamanzi okungcono futhi inciphise izinga lokulahlekelwa kwamanzi, ngaleyo ndlela yandise amathuba okuqhekeka kokuncipha.

Ngaphezu kwalokho, ukugxila kwe-HPMC kungxube kakhonkolo kungase kuthinte izinga lokuqhekeka kokuncipha. Ukugxila okuphezulu kwe-HPMC kungaholela ekugcinweni okukhulu kwamanzi, okungaholela ekwenyukeni kokuncipha kanye nokuqhekeka okulandelayo.

Esinye isici esingaba nomthelela ekuqhekekeni kokhonkolo ngenxa ye-HPMC yizimo zemvelo ngesikhathi senqubo yokwelapha. Amazinga okushisa aphezulu kanye nomswakama ophansi kungasheshisa izinga lokulahlekelwa kwamanzi kusuka kukhonkolo entsha futhi kuholele ekushwabaneni nokuqhekeka ngokushesha.

Ukunciphisa ubungozi bokuqhekeka kokhonkolo ngenxa ye-HPMC, izinyathelo ezahlukahlukene zingathathwa. Enye inketho ukusebenzisa i-HPMC enesisindo esiphansi samangqamuzana kanye nezinga lokushintsha, okunganciphisa umthamo wokugcina amanzi kanye nezinga lokulahlekelwa kwamanzi, ngaleyo ndlela kunciphise amathuba okuqhekeka kokuncipha.

Enye inketho ukukhawulela ukugxila kwe-HPMC kungxube kakhonkolo ukugwema ukugcinwa kwamanzi ngokweqile kanye nokuncipha. Ukwengeza, izimo zemvelo ngesikhathi senqubo yokwelapha, njengokugcina indawo enomswakama nokulawula izinga lokushisa, zingasiza futhi ukunciphisa ingozi yokuqhekeka kokuncipha.

Sengiphetha, ukusetshenziswa kwe-HPMC kukhonkolo kungaholela ekuqhekekeni kokuncipha ngenxa yezindawo zayo zokugcina amanzi. Izici ze-HPMC, njengesisindo samangqamuzana, izinga lokushintsha, nokugxilisa ingqondo, kanye nezimo zemvelo ngesikhathi sokwelashwa, zingathinta izinga lokuqhekeka kokuncipha. Kodwa-ke, ngezinyathelo ezifanele, njengokukhetha i-HPMC enezici ezifanele kanye nokulawula izimo zemvelo, ingozi yokuqhekeka kokuncipha ingancishiswa.