Kodi Skim coat ndi chiyani?

Chovala cha skim ndi chinthu chopyapyala chomwe chimayikidwa pakhoma kapena padenga kuti zisawonongeke ndikupanga malo athyathyathya popenta kapena kupaka mapepala. Zomwe zimagwiritsidwa ntchito popaka skim nthawi zambiri zimakhala zosakaniza madzi, simenti, ndi zina zowonjezera monga cellulose ether.

Cellulose ether ndi polima wosungunuka m'madzi wochokera ku cellulose wachilengedwe. Amagwiritsidwa ntchito kwambiri pantchito yomanga ngati thickener, stabilizer, binder, ndi wosungira madzi. Pankhani ya skim coat, cellulose ether imawonjezeredwa kusakaniza kuti ipereke ntchito yabwino komanso kusunga madzi.

Imodzi mwamaudindo ofunikira a cellulose ether mu skim coat ndikutha kukulitsa kusakaniza. Chovala cha skim chiyenera kukhala chochepa kwambiri kuti chifalikire mosavuta pamwamba koma chokhuthala mokwanira kuti chitseke mipata kapena zolakwika zilizonse. Cellulose ether imathandiza kukwaniritsa kusasinthasintha koyenera mwa kukulitsa kusakaniza, kuti zikhale zosavuta kufalitsa mofanana pamwamba.

Ntchito ina yofunika ya cellulose ether mu skim coat ndikutha kusunga madzi. Chovala cha skim chimayenera kukhala chonyowa kwa nthawi yayitali kuti chitsimikizire kuti chimamatira bwino komanso kupewa kusweka kapena kuchepa. Cellulose ether imathandizira kusunga madzi mumsanganizo, zomwe zimachepetsa kuyanika ndikuonetsetsa kuti malaya a skim akhazikika bwino.

Cellulose ether imagwiranso ntchito ngati chomangira mu malaya a skim, kuthandiza kugwirizanitsa chisakanizocho ndikuwongolera kumamatira kwake pamwamba. Izi zimatsimikizira kuti malaya a skim amapanga mgwirizano wolimba ndi pamwamba, kupanga chosalala komanso chowoneka bwino chojambula kapena kujambula.

Ubwino ndi magwiridwe antchito a skim coat zimakhudzidwa kwambiri ndi mtundu ndi kuchuluka kwa cellulose ether yomwe imagwiritsidwa ntchito. Pali mitundu yosiyanasiyana ya etha ya cellulose yomwe ikupezeka pamsika, monga hydroxyethyl cellulose (HEC), methyl cellulose (MC), ndi carboxymethyl cellulose (CMC). Mtundu uliwonse uli ndi mawonekedwe ndi mawonekedwe osiyanasiyana, ndipo kusankha mtundu woyenera ndi kuchuluka kwake ndikofunikira pakuzindikira mtundu wa malaya osambira.

Mwachidule, cellulose ether imagwira ntchito yofunika kwambiri pakupanga ma skim coat. Amapereka zofunikira zowonjezera, zomangiriza, ndi zosungira madzi kusakaniza, zomwe zimatsimikizira kuti zimagwira ntchito, zimapangitsa kuti azimatira, komanso zimalepheretsa kusweka kapena kuchepa. Kusankha mtundu woyenera ndi kuchuluka kwa cellulose ether ndikofunikira popanga malaya apamwamba a skim coat omwe amakwaniritsa zofunikira zamakampani omanga.