I-Cellulose iyi-polysaccharide eyakha izimpaphe zempi ezinhlobonhlobo zamanzi. Ama-cellulose mkhulu ama-polymers ancibilikayo ancibilikayo. Umlando wawo wokusebenzisa isikhathi eside, ngaphezu kweminyaka engama-30, futhi kunezinhlobo eziningi. Basasetshenziswa cishe cishe kuwo wonke amapende ama-latex futhi bangama-moveram abakhulu. Ama-celluliosic omkhulu asebenza kahle kakhulu ezinhlelweni zamashele ngoba zikhula amanzi uqobo. Embonini yokupenda, ama-cellulose asetshenziswa kakhulu yi-cellulose esetshenziswa kakhulu yile: I-MethylYyllose, i-HydroxyEthyl cellulose (i-HPCHPROPYL Cellulose (HPMC), iHydroxypropyllls (HPMC), i-Hydroxypropylls (HPMC) kanye ne-Hydropobilly MethroxYethyl cellulose ( HMBHEC). I-HEC yi-polysaccharide esetshenziswa ngamanzi kabanzi esetshenziswa kakhulu ekuqondeni kwamapende we-tandx ne-semi-grass ye-latex. Ama-Fireners atholakala kumabanga okubona ahlukile kanye nama-cellulose anokuhambisana okuhle kombala nokuqina kwesitoreji.
I-Level, anti-splash, izakhiwo ezenziwe ngefilimu nezolwa zokulwa nefilimu ye-coating kuncike esimeni se-HEC esihlobene. I-HEC namanye ama-polymers angenayo angenayo ahlanganisiwe aqina isigaba samanzi se-coating. Ama-cellulose amikhulu angasetshenziswa yedwa noma ahlanganiswe nabanye abakhulu ukuthola i-rheology ekhethekile. I-Cellulose Afers ingaba nezinsimbi ezihlukile ze-molecular kanye namamaki okufanekisa, asuka esisindo esiphansi samamayela esingu-2% i-viscosity etholakala nge-10 MPS eguquguqukayo ye-100 000 MP.S. Amamaki wesisindo aphansi avame ukusetshenziswa njengama-colloids avikelayo e-Latex Paint emulzerization, kanye namabanga ajwayelekile (i-viscosity 4 800-50 000 mp · s) asetshenziswa njengabakhulu. Indlela yalolu hlobo lwe-smilener ingenxa ye-hydration ephezulu yama-hydrogen bond kanye nokufakwa phakathi kwamaketanga alo molefanel.
I-cellulose yendabuko i-polymer ephezulu ye-molecular ikhula ikakhulukazi ngokusebenzisa amaketanga ama-molefanel. Ngenxa yokuvunywa okuphezulu ngezinga eliphansi le-shear, impahla ekwandisayo ayimpofu, futhi ithinta i-gloss of the film ye-coating. Ngezinga eliphakeme kakhulu, i-viscosity iphansi, ukumelana okuchithekile kwefilimu yokuhlanganisa kumpofu, futhi ukugcwala kwefilimu yokuhlanganisa akukuhle. Izici zohlelo lokusebenza lwe-HEC, njengokuvimbela ukuxubha, ukuqopha kanye nokugibela i-roller, zihlobene ngokuqondile nokukhethwa komkhulu. Futhi izakhiwo zayo zokugeleza ezinjengezinga lokulinganisa nokulinganisa kwalokhu zithinteka kakhulu ngabakhulu.
I-Hydrophobically Moshified cellulose (HMHEC) yi-cellulose nyouner enokuguqulwa kwe-hydrophobic ngamanye amaketanga afakwe ama-alky (amaqembu amade we-alkyl amade ekhasini eliphakeme lesakhiwo). Le nhlanganisela inokubona okuphezulu ezindaweni eziphakeme ze-shear futhi ngenxa yalokho ukwakheka kwefilimu okungcono. Njenge-natrosol plus grade 330, 331, celosize SG-100, Bermocoll EHM-100. Umphumela wayo wokuqina uqhathaniswa nalokho kwe-cellulose ether cregeters enesisindo esikhulu se-molecular molecular. Kuthuthukisa ukubonakala nokusezingeni le-ICI, futhi kunciphisa ukungezwani komhlaba. Isibonelo, ukungezwani kwe-HEC kucishe kube ngu-67 MN / M, kanti ukungezwani kwe-HMBEC kungu-55 ~ 65 mN / m.
I-HMBHEC inokufakelwa okuhle kakhulu, ukulwa nama-sagging, amazinga okulinganisa, isicwebezelisi esihle kanye nokuvuka okulwa nopende. Isetshenziswa kabanzi futhi ayinawo umphumela ongemuhle ekwakhekeni kwamafilimu kwamapende amahle we-latex. Ukusebenza okuhle kwefilimu nokusebenza kokulwa nokulwa nokuwohloka. Lo hlobo oluthile lokuhlanganisa oluhlangene lusebenza kangcono ngezinhlelo ze-vinyl acetate copolymer, futhi ukusebenza kwalo kuyafana nezinye izinhlanzi ezihlangene, kepha ngokwenza lula ukwakhiwa.
Isikhathi sePosi: Mar-16-2023