Izicelo zokuQinisa kunye nokwenza iifilimu ze-MHEC kwiShishini leeCoatings

I-Methyl hydroxyethyl cellulose (MHEC)yi-cellulose ether ebalulekileyo engeyiyo ionic, enyibilikayo emanzini esetyenziswa kakhulu kushishino lwezogquma, ngakumbi kwiinkqubo zogquma ezisekelwe emanzini. Ukuqina kwayo, ukugcinwa kwamanzi, ulawulo lwe-rheological, kunye nemiphumo yentsebenziswano yokwenza ifilimu zibonakala kakhulu. Ngenxa yemithetho yokusingqongileyo engqongqo ngakumbi kunye nophuhliso olukhawulezileyo lwemarike yezogquma ezisekelwe emanzini, i-MHEC ibe yenye yezongezo ezibalulekileyo ezisebenzayo zokuphucula ukusebenza kogquma.

Ngokuphathelele ukuqina, i-MHEC inyusa kakhulu ukuqina kwenkqubo yokugquma ngokudumba ngokupheleleyo imixokelelwane yayo yepolymer emanzini kwaye yenze isakhiwo senethiwekhi yendawo. Esi siphumo sokuqina sibonisa iimpawu ezicacileyo ze-pseudoplastic: ukugcina ukuqina okuphezulu phantsi kweemeko eziphantsi zokusika ukuthintela i-pigment kunye ne-filler sedimentation kunye ne-stratification; kunye nokunciphisa ukuqina phantsi kweemeko eziphezulu zokusika, okwenza kube lula ukuxubha kunye nokusebenza kokutshiza. Le propati ye-rheological ivumela ulungelelwaniso oluhle phakathi kozinzo lokugcina kunye nokusebenza kwesicelo, kunciphisa iziphene zesicelo ezifana nokugoba kunye nokutshiza.

I-MHEC idlala indima ebalulekileyo yokusebenzisana kwinkqubo yokwenza ifilimu. Nangona i-MHEC ngokwayo ingeyo-resin yokwenza ifilimu, amandla ayo okugcina amanzi acothisa isantya sokuphuma kwamanzi, ivumela amasuntswana e-emulsion ukuba adibane ngokupheleleyo, ngaloo ndlela enze ifilimu eqhubekayo nexineneyo. Oku kunempembelelo entle ekuphuculeni ukuthamba, ukunamathela, kunye nokubonakala komphezulu wefilimu yokugquma, ngakumbi xa isetyenziswa kwiindawo ezinobushushu obuphezulu okanye ezomileyo, apho isiphumo se-MHEC sibonakala ngakumbi.

I-MHEC ikwaphucula uzinzo lokusasazeka kwenkqubo yokugquma. Amaqela athanda amanzi kwisakhiwo sayo semolekyuli anceda ekusasazeni imibala kunye nezizalisi ngokulinganayo, anciphise ukuqunjelwa kunye nokwahlukana kombala, ngaloo ndlela aphucula ukufana kombala kunye namandla okufihla ifilimu yokugquma. Kwangaxeshanye, i-MHEC yimveliso engeyiyo i-ionic, ayikhathali kutshintsho lwe-pH, kwaye ihambelana kakuhle nee-emulsions ezahlukeneyo kunye nezongezo, nto leyo eyenza ukuba isetyenziswe ngokubanzi.

Ngokwembono yokusingqongileyo nokhuseleko,I-MHECisuka kwi-cellulose yendalo kwaye ineengenelo zevumba eliphantsi, i-VOC ephantsi, kunye nokungabi natyhefu, ihambelana nesikhokelo sophuhliso lwangoku lweengubo eziluhlaza. Ngokukhetha ngokunengqiqo iimveliso ze-MHEC ezinamazinga ahlukeneyo e-viscosity kunye namanqanaba okutshintsha, iifomyula zinokulungiswa kwiipeyinti ze-latex zangaphakathi, iingubo zangaphandle, kunye neengubo ezisekelwe emanzini ezisebenzayo. Kwishishini leengubo, i-MHEC ayisiyonto nje yokuqinisa esebenza kakhulu kodwa ikwayisongezo esibalulekileyo esichaphazela umgangatho wokwenziwa kwefilimu kunye nokusebenza ngokubanzi. Ixabiso layo elipheleleyo ekuphuculeni ukusebenza kakuhle, ukuphucula ukubonakala kwengubo, kunye nokwandisa uzinzo kwenza ukuba ibe yinxalenye ebalulekileyo kwiifomyula zanamhlanje zengubo ezisekelwe emanzini.