Chii chinonzi Skim coat?

A skim coat idhadha rakatetepa rechinhu chakaiswa kumadziro kana sirin'i kutsvedzerera kusakwana uye kugadzira nzvimbo yakati sandara yekupenda kana kupenta.Izvo zvinoshandiswa pakupfekedza skim zvinowanzoitika musanganiswa wemvura, simende, uye zvimwe zvekuwedzera senge cellulose ether.

Cellulose ether ipolymer inonyungudika nemvura inotorwa kubva kucellulose chaiyo.Inoshandiswa zvakanyanya muindasitiri yekuvaka seyakakora, stabilizer, binder, uye mumiriri wekuchengetedza mvura.Muchiitiko che skim coat, cellulose ether inowedzerwa kumusanganiswa kuti ipe kuvandudzwa kwekushanda uye kuchengetedza mvura.

Imwe yebasa rakakosha re cellulose ether mu skim coat kugona kwayo kukora musanganiswa.Skim jasi rinoda kuve rakatetepa zvakakwana kuti ripararire zviri nyore pamusoro pepamusoro asi rakakora zvakakwana kuzadza chero mapundu kana kusakwana.Cellulose ether inobatsira mukuwana kuenderana kwakakodzera nekukora musanganiswa, zvichiita kuti zvive nyore kupararira zvakaenzana pamusoro pepamusoro.

Rimwe basa rakakosha re cellulose ether mu skim coat kugona kwayo kuchengetedza mvura.Skim jasi rinoda kugara rakanyorova kweimwe nguva yenguva kuti ive nechokwadi chekunamatira uye kudzivirira kutsemuka kana kudonha.Cellulose ether inobatsira mukuchengetedza mvura mumusanganiswa, iyo inononoka kuomesa uye inovimbisa kuti skim jasi rinogara zvakanaka.

Cellulose ether inoshandawo sebhainda mujasi re skim, inobatsira kubata musanganiswa pamwe chete nekuvandudza kunamatira kwayo kumusoro.Izvi zvinovimbisa kuti jasi re skim rinoumba chisungo chakasimba nechepamusoro, chichigadzira yakatsetseka uye kunyange pamusoro pekupenda kana mapepa emadziro.

Hunhu uye kuita kwe skim jasi kunokonzerwa zvakanyanya nerudzi uye huwandu hwe cellulose ether inoshandiswa.Kune akasiyana marudzi ecellulose ether anowanikwa pamusika, akadai sehydroxyethyl cellulose (HEC), methyl cellulose (MC), uye carboxymethyl cellulose (CMC).Rudzi rwega rwega rune zvimiro uye hunhu hwakasiyana, uye kusarudza iyo chaiyo mhando uye huwandu hwakakosha pakuona kunaka kwejasi re skim.

Muchidimbu, cellulose ether inoita basa rakakosha mukugadzirwa kwejasi re skim.Inopa iyo inodiwa thickening, kusunga, uye kuchengetedza mvura zvivakwa kune musanganiswa, iyo inovimbisa kushanda kwayo, inovandudza kunamatira, uye inodzivirira kuputika kana shrinkage.Kusarudza mhando yakakodzera uye huwandu hweselulosi ether kwakakosha mukugadzira yemhando yepamusoro skim jasi rinosangana nezvinodiwa zveindasitiri yekuvaka.