(1. Intshayelelo
IHydroxypropyl methylcellulose (HPMC) yi-ether eselulosi enyibilikayo emanzini esetyenziswa kakhulu kwiipeyinti zelatex. Inokuchaphazela kakhulu iipropathi ze-rheological, ukuxhathisa kwe-sag kunye nokuguda komphezulu wepeyinti ye-latex. Nangona kunjalo, kwizicelo ezibonakalayo, iipropati ezisisiseko ze-HPMC zodwa zisenokunganeli ukuhlangabezana nazo zonke iimfuno zokuqina, ngoko ke amanyathelo athile kufuneka athathwe ukuphucula ukuqina kwayo kwiipende ze-latex.
(2) Indlela yokusebenza ye-HPMC
I-HPMC iphucula amandla kunye nokuqina kwefilimu yepeyinti ngokwenza isakhiwo sothungelwano kwipeyinti ye-latex. Inemisebenzi emininzi ebalulekileyo:
Ukuphucula iimpawu ze-rheological: I-HPMC inokulungelelanisa i-viscosity yepeyinti ye-latex, inike umsebenzi ofanelekileyo wokwakha, kunye nokunciphisa ukuthoba.
Ukuphucula iimpawu zokugquma: inokusasaza ngokulinganayo ii-pigments kunye nezihluzi ukuqinisekisa ukufana kunye nokugudiswa komphezulu wefilimu yepeyinti.
Ukwandisa iipropati zokwenza ifilimu: I-HPMC inokudibanisa kunye neemolekyuli zamanzi ukunceda ifilimu yepeyinti ifake kwaye igcine ukuqina kwayo kunye namandla.
(3) Izinto ezichaphazela ukuqina kwe-HPMC
Xa uphucula ukuqina kwe-HPMC kwipeyinti ye-latex, le miba ilandelayo kufuneka ithathelwe ingqalelo:
Umgangatho we-HPMC: Umgangatho ophezulu we-HPMC unokubonelela ngeepropati zeekhemikhali ezizinzileyo kunye nokuxhathisa okunamandla ekuthotyweni.
Ukumelana nokuqhekeka kwefilimu yepeyinti: Ukumelana nokuqhekeka kwefilimu yepeyinti kuxhomekeke kubunzima bemolekyuli kunye nenqanaba lokuthatha indawo ye-HPMC, echaphazela amandla ayo okuwela ikhonkco kunye nokudibanisa namanye amacandelo.
Iimeko zokusingqongileyo: Imiba yokusingqongileyo efana nemitha ye-ultraviolet, ukufuma, kunye nobushushu kunempembelelo enkulu ekusebenzeni kwe-HPMC. Iindidi ezifanelekileyo ze-HPMC kufuneka zikhethwe ukumelana nemingeni yeemeko ezahlukeneyo.
(4) Amaqhinga okuphucula ukuqina kwe-HPMC
1. Ukwandisa ubume bemichiza ye-HPMC
Ukukhetha i-HPMC eneqondo elifanelekileyo lokutshintshwa kunokuphucula uzinzo kunye nokuqina kwifilimu yepeyinti. Ngokubanzi, i-HPMC eneqondo eliphezulu lokutshintshwa ingcono ukumelana ne-hydrolysis kunye nokuthotywa kwe-UV. Ukongeza, ukulungelelanisa ubunzima bemolekyuli ye-HPMC inokuchaphazela neempawu zayo ze-rheological kunye neempawu zokwenza ifilimu kwiipeyinti ze-latex.
2. Uhlengahlengiso lwefomula
Ngokulungelelanisa ngokufanelekileyo ifomyula yepeyinti ye-latex, ukusebenza kwe-HPMC kunokwandiswa:
Sebenzisa izongezo ezifanelekileyo zokwenza ifilimu: Ukongeza izongezo zefilimu ezifana ne-ethylene glycol okanye ipropylene glycol inokuphucula ukuguquguquka kwe-HPMC kwifilimu yepeyinti kunye nokunciphisa umngcipheko wokuqhekeka.
Ukongeza i-agent-linking-cross-linking agents: Ii-agent zokudibanisa ezinqamlezileyo zinokuphucula ukudibanisa kwamakhonkco e-polymer ngexesha lokubunjwa kwefilimu yepeyinti, ngaloo ndlela kuphuculwe amandla omatshini kunye nokuqina kwefilimu yepeyinti.
Ukusetyenziswa kwezinzisi: Ukongeza i-antioxidants kunye ne-UV absorbers kunokunciphisa izinga lokuthotywa kwe-HPMC kunye neefilimu zepeyinti kunye nokwandisa ubomi babo benkonzo.
3. Ukuphucula iteknoloji yokwakha
Ukuphucula inkqubo yokwakhiwa kwepeyinti yelatex nako kunokuchaphazela kakhulu ukuqina kwayo:
Ukutyeba okufanelekileyo kwePeyinti yeFilimu: Ukuqinisekisa ukutyeba kwefilimu yepeyinti efanayo kunciphisa amathuba okuqhekeka kwefilimu kunye nokuqhekeka.
Ukulawulwa kwendawo yokwakha: Ukulawula umswakama kunye nobushushu kwindawo yokwakha kunokunciphisa uxinzelelo ngexesha lokunyanga ifilimu yepeyinti, ngaloo ndlela iphucula ukuhlala kwayo.
4. Ukugquma kwe-Multi-layer
Ukusebenzisa inkqubo yokugquma yamatye amaninzi kunokwandisa ngokufanelekileyo ukuqina kwepeyinti yelatex. Ixesha elaneleyo lokumisa liyafuneka phakathi kwengubo nganye yepeyinti ukuze kuqinisekiswe ukuphilisa ngokupheleleyo kunye nokudibanisa ifilimu yepeyinti.
5. Sebenzisa ii-ether ze-cellulose eziyinkimbinkimbi
Ngokudibanisa i-HPMC kunye nezinye i-cellulose ethers ezifana ne-carboxymethylcellulose (CMC), iipropati ezincedisayo zinokufezekiswa, ngaloo ndlela kuphuculwe ukuqina kwepeyinti ye-latex. I-ethers ye-cellulose eyinkimbinkimbi inokubonelela ngeempawu ezingcono ze-rheological kunye nokuqina kwefilimu.
Ukuphucula ukuqina kwe-HPMC kwipeyinti ye-latex ngumsebenzi obanzi ofuna ukuphuculwa kwimiba emininzi efana nolwakhiwo lweekhemikhali, uhlengahlengiso lwefomula, kunye nobuchwepheshe bokwakha. Ukudityaniswa komgangatho ophezulu we-HPMC, izongezo ezifanelekileyo kunye nobuchule bokwakha obufanelekileyo kunokuphucula ngokubonakalayo ukuqina kwepeyinti ye-latex, ukuyivumela ukuba igcine ukusebenza kakuhle kunye nokubonakala kwiindawo ezahlukeneyo ezinzima.
Ixesha lokuposa: Jul-04-2024