IHydroxypropylmethylcellulose (HPMC) yipolymer eguquguqukayo enoluhlu olubanzi lwezicelo kumashishini ahlukeneyo.Elinye lamashishini apho i-HPMC idlala indima ephambili yipeyinti kunye neshishini lezogquma.Ngenxa yeempawu zayo ezizodwa, i-HPMC isetyenziswa kwiipeyinti kunye neengubo njengeyona nto iphambili ekuqulunqweni kwezi mveliso.
I-HPMC yipolima enyibilikayo emanzini ephuma kwi-cellulose ethers.Ineempawu ezahlukeneyo ezifana nokutyeba okuphezulu, ukubumbana, ukuncamathela, umxholo womlotha ophantsi, ukwenza ifilimu, kunye nokugcinwa kwamanzi.Ezi zakhiwo zenza i-HPMC ibe yinto efanelekileyo ekuqulunqweni kwepeyinti kunye neemveliso zokugquma.
Ukusetyenziswa kwe-HPMC kushishino lwepeyinti kunye neengubo zokwaleka kuzisa iinzuzo ezininzi kubavelisi, abasasazi kunye nabasebenzisi bokugqibela.Ezinye zezi zibonelelo zixoxwa ngezantsi:
1. Ukutyeba
Olunye uncedo oluphambili lokusebenzisa i-HPMC kwipeyinti kunye nokwakheka kokugquma kukusetyenziswa kwayo njengento etyebisayo.I-HPMC ineempawu ezigqwesileyo zokujiya kwaye idla ngokusetyenziselwa ukunyusa i-viscosity yeengubo.Le propati ibalulekile ekuveliseni iingubo ezinobumba obulula, obufanayo kunye nokulula ukuyisebenzisa.
Ubunzima bepeyinti bubaluleke kakhulu kwiipende kunye neengubo ezifakwe ngebrashi okanye i-roller.Imixube esekwe kwi-HPMC ibonelela ngeenzuzo zokhuseleko kwiidriphu zepeyinti, ukubaleka kunye nokutshiza.Ngoko ke, i-HPMC inokunceda abavelisi baqulunqe iingubo kunye neepeyinti ekulula ukuyisebenzisa kunye nokuphatha, okwenza ukuba zithandwa ngabasebenzisi.
2. Ukugcinwa kwamanzi
I-HPMC yipolima ye-hydrophilic enamandla okugcina amanzi.Ineempawu ezigqwesileyo zokugcina amanzi, eyona nzuzo ibalulekileyo ekwenzeni iipeyinti kunye neengubo.Ukugcinwa kwamanzi kwandisa ukufana kwefilimu kwaye kunika ukusabalalisa kombala okungcono.Kwakhona kunceda ukwandisa ubomi beshelufu yepeyinti.
Ngaphaya koko, ukugcinwa kwamanzi yenye yezona parameters zibaluleke kakhulu kumgangatho wokugquma kunye nokusebenza.Ipeyinti kufuneka ihlale isebenza ixesha elide kwaye i-HPMC iqinisekisa ukuba ipeyinti ayimi ngokukhawuleza.
3. Ukudibanisa kunye noKubambelela
I-HPMC ineepropati ezibalaseleyo zokudibanisa kunye nokudibanisa, iyenza ibe yinto ebalulekileyo kwiipeyinti kunye neengubo.I-polysaccharide moiety kwi-HPMC inoxanduva lokubopha okulungileyo kunye neempawu zokubambelela kwi-polymer.
Iimpawu zokuncamathelisa ze-HPMC zinceda ukubamba ii-pigments kunye nezihluzi kunye, okukhokelela kumbala ofanayo kwifilimu yepeyinti.I-HPMC iqinisekisa ukusasazwa kakuhle kwee-pigments kunye nezihluzi kwipeyinti, okukhokelela kwisiphelo esigudileyo, esinamandla.
Ngakolunye uhlangothi, ukunamathela kwe-HPMC kuhambelana nokunamathela kwifilimu yepeyinti kwi-substrate, okwenza ipeyinti ibe yinto ehlala ixesha elide kwaye ihlala ixesha elide.
4. Isakhono sokwenza ifilimu
I-HPMC isebenza njengefilimu yangaphambili xa kusenziwa iipeyinti kunye neengubo.Inceda ukwenza ifilimu eqhubekayo ekhusela umphezulu kwizinto ezisingqongileyo ezifana nokukhanya kwelanga, amanzi kunye nokufuma.Ukuqulunqwa kwale filimu kukhusela i-substrate kwi-abrasion, i-corrosion kunye nomnye umonakalo.
Ukongeza, iifilimu zepeyinti ezisekwe kwi-HPMC zizinzile ngokwekhemikhali kwaye zibonisa ukuxhathisa okugqwesileyo kwamabala kunye nokuqina, zibenza zibe ngamacandelo afanelekileyo okufakwa kwepeyinti yendlu.
Ukusetyenziswa kwe-hydroxypropyl methylcellulose kwipeyinti kunye nokuxutywa kwe-coating kubonelela ngeenzuzo ezininzi kubavelisi, abasasazi kunye nabasebenzisi bokugqibela.Iipeyinti ezisekelwe kwi-HPMC kunye neengubo zithandwa ngabathengi ngenxa yokutyeba okugqwesileyo, ukugcinwa kwamanzi, ukudibanisa, ukunamathela kunye neempawu zokwenza ifilimu.Iphucula umgangatho kunye nokusebenza kwepeyinti kunye neemveliso zokugquma, ukubonelela ngexabiso elingcono kubasebenzisi.Kwixesha elizayo, ukufakwa kwe-HPMC ekuveliseni iipeyinti kunye neengubo zokugqoka kukhuthazwa kakhulu.
Ixesha lokuposa: Aug-16-2023