Iyini i-Skim coat?

Ijazi le-skim ungqimba oluncane lwento esetshenziswa odongeni noma ophahleni ukuze bushelelezi ukungapheleli nokudala indawo eyisicaba yokudweba noma ukwenza iphepha lodonga. Izinto ezisetshenziselwa ukugqoka i-skim ngokuvamile ziyingxube yamanzi, usimende, nezinye izithasiselo ezifana ne-cellulose ether.

I-Cellulose ether i-polymer encibilika emanzini etholakala ku-cellulose yemvelo. Isetshenziswa kabanzi embonini yezokwakha njenge-thickener, stabilizer, binder, kanye ne-ejenti yokugcina amanzi. Endabeni ye-skim coat, i-cellulose ether yengezwa engxubeni ukuze inikeze ukusebenza okuthuthukisiwe kanye nezindawo zokugcina amanzi.

Enye yezindima ezibalulekile ze-cellulose ether ku-skim coat yikhono layo lokujiyisa ingxube. Ijazi le-Skim lidinga ukuba mncane ngokwanele ukuze lisabalale kalula kodwa lijiye ngokwanele ukugcwalisa izikhala noma ukungapheleli. I-Cellulose ether isiza ekuzuzeni ukuvumelana okulungile ngokujiya ingxube, ikwenze kube lula ukusabalala ngokulinganayo phezu kwendawo.

Omunye umsebenzi obalulekile we-cellulose ether ku-skim coat yikhono layo lokugcina amanzi. Ijazi le-Skim lidinga ukuhlala limanzi isikhathi esithile ukuze kuqinisekiswe ukunamathela okufanele futhi kuvimbele ukuqhekeka noma ukuncipha. I-Cellulose ether isiza ekugcineni amanzi enhlanganisweni, ebambezela inqubo yokomisa futhi iqinisekise ukuthi ijazi le-skim lihlala kahle.

I-Cellulose ether iphinde isebenze njenge-binder ku-skim coat, esiza ukubamba ingxube ndawonye futhi ithuthukise ukunamathela kwayo phezulu. Lokhu kuqinisekisa ukuthi ijazi le-skim lakha isibopho esiqinile nengaphezulu, okwenza kube bushelelezi futhi ngisho nendawo yokudweba noma ukwenza iphepha lodonga.

Izinga nokusebenza kwe-skim coat kuthonywa kakhulu uhlobo nenani le-cellulose ether esetshenzisiwe. Kunezinhlobo ezahlukene ze-cellulose ether etholakala emakethe, njenge-hydroxyethyl cellulose (HEC), i-methyl cellulose (MC), ne-carboxymethyl cellulose (CMC). Uhlobo ngalunye lunezici nezici ezihlukile, futhi ukukhetha uhlobo olufanele kanye nenani kubalulekile ekunqumeni ikhwalithi yejazi le-skim.

Kafushane, i-cellulose ether idlala indima ebalulekile ekukhiqizeni i-skim coat. Ihlinzeka ngezinto ezidingekayo zokuqina, ukubopha, kanye nokugcinwa kwamanzi engxubeni, okuqinisekisa ukusebenza kwayo, ukuthuthukisa ukunamathela, nokuvimbela ukuqhekeka noma ukuncipha. Ukukhetha uhlobo olufanele kanye nenani le-cellulose ether kubalulekile ekukhiqizeni ijazi le-skim lekhwalithi ephezulu elihlangabezana namazinga adingekayo embonini yezokwakha.