I-HPMC (Hydroxypropyl methylcelcelcelsulose)sisiseko esisetyenzisiweyo solwakhiwo esisetyenzisiweyo kwaye sisetyenziswa ngokubanzi kwi-gyppum yodaka. Ezona zinto ziphambili kukuphucula ukusebenza kobukho, ukuphucula ukugcinwa kwamanzi, ukuphucula ubumbeleli kunye nokulungelelanisa iipropathi ze-suheological yodaka. U-Gyppum udaka yinto yokwakha ene-gypsum njengelona candelo liphambili, elihlala lisetyenziswa eludongeni kunye nolwakhiwo lokuhombisa lodonga.
I-1. Isiphumo se-HPMC Dosage ekugcinweni kwe-Gyppum yodaka
Ukugcinwa kwamanzi yenye yezona zinto zibalulekileyo ze-gyppum fars, ezinxulumene ngqo nendlela yokwakha kunye nokwabelana ngamandla odaka. I-HPMC, njengePolecular ephezulu, igcinwe kakuhle lamanzi. Iimolekyuli zayo ziqukethe inani elikhulu le-hydroxyl kunye namaqela e-ether. Ezi qela ze-hydrophilic zinokwenza iibhondi ze-hydrogen ngeemolekyuli zamanzi zokunciphisa ingxoxo yamanzi. Ke ngoko, ukongezwa kwesixa-mali esifanelekileyo se-HPMC kunokuphucula ngokufanelekileyo ukugcinwa kwamanzi kudaka kwaye kuthintele udaka ukuba luphume ngokukhawuleza kwaye lukhawuleze umphezulu ngexesha lokwakha.
Izifundo zibonakalise ukuba ukonyuka kwe-HPMC Dosage, ukugcinwa kwamanzi kodaka kunyuka ngokuthe ngcembe. Nangona kunjalo, xa idosi iphezulu kakhulu, i-RUOOOLOLOGLO LOLULEKILE Inokuba inkulu kakhulu, ichaphazela intsebenzo yokwakha. Ke ngoko, i-pusage efanelekileyo ye-HPMC kufuneka ilungiswe ngokobulungisa.
2. Isiphumo se-HPMC Dosage kumandla e-bill ye-gypsim yodaka
I-Bonding yamandla yenye indlela entsokothileyo ye-gyppum yodaka, oluchaphazela ngokuthe ngqo imbethe phakathi kodaka kunye nesiseko. I-HPMC, njengePolecular ephezulu, inokuphucula ubumbano kunye nokwenza umsebenzi wokwenza ubumbano. Isixa esifanelekileyo se-HPMC sinokuphucula ukonwaba kodaka, ukuze ikwazi ukubopha ububi bodonga kunye nodonga ngexesha lokwakha.
Izifundo zovavanyo zibonakalise ukuba i-Dosage ye-HPMC inefuthe elibonakalayo kumandla aphezulu kodaka. Xa idosi ye-HPMC iphakathi koluhlu oluthile (ngokufuthi i-0.2% -0.6%), amandla e-boing abonisa indlela ephezulu. Kungenxa yokuba i-HPMC inokuphucula iplasitiki yodaka, ukuze ikwazi ukulungela ubungakanani bendawo ngexesha lokwakha kwaye kuncitshiswe ukuphalazwa kunye nokuqhekeka. Nangona kunjalo, ukuba umthamo uphakame kakhulu, udaka lunokuba lulwelo olugqithisileyo, oluchaphazela ububi bayo kwindawo yokuthambisa, ngaloo ndlela kunciphisa amandla.
I-3. Iziphumo ze-HPMC Dosage kwi-fluidomity kunye nokusebenza kokwakhiwa kwe-gyppum far
Ulwelo sisiphumo esibaluleke kakhulu sentsebenzo kwinkqubo yokwakha i-gyppum yodaka, ngakumbi ukwakhiwa kwendawo enkulu yendawo. Ukongezwa kwe-HPMC kunokuphucula kakhulu udaka lodaka, kuyenza lula ukwakha nokusebenza. Iimpawu ze-HPMC ye-HPMC zenza ukuba inyuse udaka lodaka ngokutyibilika, ngaloo ndlela kuphuculwe umsebenzi wokusebenza nokusebenza kodaka.
Xa idosi ye-HPMC iphantsi, ifrafity yodaka ihlwempu, enokukhokelela kubunzima bokwakha kunye nokudrapha. Isixa esifanelekileyo se-HPMC Dosage (ihlala iphakathi kwe-0.2% -0.6%) inokuphucula ukuntywila kodaka, ukuphucula ukusebenza kwayo, kwaye ke kuphucule ukusebenza ngokukuko. Nangona kunjalo, ukuba umthamo uphakame kakhulu, ifrafity yodaka iya kuba yi-vicous, inkqubo yokwakha iya kuba nzima, kwaye inokukhokelela kwinkunkuma yempahla.
I-4. Iziphumo ze-HPMC Dosage kwi-shrinking ye-gypsim yodaka
I-Shrinkage eyomileyo yenye yepropathi ebalulekileyo ye-gyppum yodaka. I-shrinkage egqithisileyo inokuthi ibangele ukuba kuqhekezwe eludongeni. Ukongezwa kwe-HPMC kunokunciphisa ngokufanelekileyo ukuntywila kodaka. Isifundo sifumanise ukuba isixa esifanelekileyo se-HPMC sinokunciphisa ukuthunga kwamanzi, ngaloo ndlela kunciphisa i-shrintage ye-shrintage ye-gyppum far. Ukongeza, isakhiwo se-HPMC sinokwenza ubume obuzinzileyo kwenethiwekhi, ngakumbi ukuphucula ukunganyangeki kodaka.
Nangona kunjalo, ukuba umthamo we-HPMC uphezulu kakhulu, unokubangela udaka ukuba lube ixesha elide, ichaphazela ukusebenza ngokwakha. Kwangelo xesha, i-viscofity ephezulu inokubangela ukusasazwa kwamanzi ngexesha lolwakhiwo, kuchaphazele ukuphucuka kwe-shrinkage.
I-5. Iziphumo ze-HPMC Dosage kwi-Crack Ukunganyangeki kwe-gyppum far
Ukunganyangeki sisiphumo esibalulekileyo sokuvavanya umgangatho we-gyppum far. I-HPMC inokuphucula ukumelana kwe-rack ye-rack ngokuphucula amandla engcinezelo, ukunamathela kunye nobunzima bodaka. Ngokongeza isixa esifanelekileyo se-HPMC, ukuchasana kwe-rack ye-gyppum udaka kunokuphuculwa ngokufanelekileyo ukuphepha imingxunya ebangelwe ngamandla angaphandle okanye utshintsho lobushushu.
Umthamo ofanelekileyo we-HPMC ngokubanzi uphakathi kwe-0.3% ne-0.5%, enokuphucula ubunzima bobumbano lodaka kunye nokunciphisa imingxunya ebangelwe lumehluko kunye ne-shrinkage. Nangona kunjalo, ukuba umthamo uphakame kakhulu, i-viscofity egqithisileyo inokubangela ukuba udaka lunyanga ngokuthe ngcembe, ngenxa yoko ichaphazela ukunganyangeki kwe-rack.
I-6. Ulungelelwaniso kunye nokusetyenziswa okusebenzayo kwe-HPMC Dosage
Ukusuka kuhlalutyo lwezikhombisi zomsebenzi ongasentla, umthamo weI-HPMCinefuthe elibonakalayo kwintsebenzo ye-gyppum yodaka. Nangona kunjalo, uluhlu lwe-dosage elifanelekileyo yinkqubo yokulinganisa, kwaye idosi ihlala icetyiswa ukuba ibe yi-0.2% ukuya kwi-0.6%. Indawo eyahlukeneyo yokwakha kunye neemfuno zokusetyenziswa zinokufuna uhlengahlengiso kwi-dosage ukufezekisa eyona ntsebenzo ilungileyo. Kwizicelo ezisebenzayo, ukongeza kumthamo we-HPMC, ezinye izinto kufuneka ziqwalaselwe, njengenxalenye yodaka, iipropathi zeemeko zomhlaba kunye nolwakhiwo.
Umthamo we-HPMC unefuthe elibonakalayo kwintsebenzo ye-gyppum yodaka. Isixa esifanelekileyo se-HPMC sinokuphucula ngokufanelekileyo iiprofayili eziphambili zodaka olunjengokugcinwa kwamanzi njengokugcinwa kwamanzi, ukuhambisa amandla, ulwalamano, kunye nokunganyanyeki. Ulawulo lomthamo kufuneka luqwalasele ngokupheleleyo iimfuno zomsebenzi wokwakha kunye namandla okugqibela kodaka. I-dosage efanelekileyo ye-HPMC ayinakuphuculanga umsebenzi wokwakha wodaka, kodwa kukuphucula ukusebenza kwexesha elide kodaka. Ke ngoko, kwimveliso yokwenyani kunye nolwakhiwo, umthamo we-HPMC kufuneka ufeze ngokweemfuno ezithile ukufezekisa okona kubalulekileyo.
IXESHA LOKUQALA: I-DEC-16 ukuya ku-2004