Udindo wa starch ether mu matope

Starch ether imagwiritsidwa ntchito kwambiri mu matope omangira, zomwe zingakhudze kukhazikika kwa matope pogwiritsa ntchito gypsum, simenti ndi laimu, komanso kusintha kapangidwe ndi kukana kwa matope. Starch ether nthawi zambiri amagwiritsidwa ntchito limodzi ndi ma cellulose ether osasinthidwa komanso osinthidwa. Ndi yoyenera machitidwe onse a neutral komanso alkaline, ndipo imagwirizana ndi zowonjezera zambiri mu gypsum ndi simenti (monga ma surfactants, MC, starch ndi polyvinyl acetate ndi ma polima ena osungunuka m'madzi).

Zinthu zazikulu:

(1) Starch ether nthawi zambiri imagwiritsidwa ntchito limodzi ndi methyl cellulose ether, zomwe zimasonyeza kuti pali mgwirizano wabwino pakati pa ziwirizi. Kuwonjezera starch ether yokwanira ku methyl cellulose ether kungathandize kwambiri kukana kutsika kwa matope ndi kukana kutsetsereka, zomwe zimapangitsa kuti pakhale phindu lalikulu.

(2) Kuwonjezera etha yokwanira ya starch ku matope okhala ndi methyl cellulose etha kungathandize kwambiri kuti matopewo azigwira ntchito bwino komanso kuti azigwira ntchito bwino, zomwe zimapangitsa kuti kapangidwe kake kakhale kosalala komanso kuti kukanda kukhale kosalala.

(3) Kuwonjezera etha yokwanira ya starch ku matope okhala ndi methyl cellulose etha kungathandize kuti matopewo asunge madzi ndikuwonjezera nthawi yotseguka.

(4) Starch ether ndi starch ether yosinthidwa mankhwala yomwe imasungunuka m'madzi, imagwirizana ndi zowonjezera zina mu matope ouma, zomwe zimagwiritsidwa ntchito kwambiri mu zomatira za matailosi, matope okonzanso, pulasitiki ya pulasitala, putty yamkati ndi yakunja ya khoma, zolumikizira zokhazikika ndi zida zodzaza, zolumikizirana, matope omangira.

Makhalidwe a starch ether makamaka amakhala mu: (a) kulimbitsa kukana kwa sag; (b) kukonza magwiridwe antchito; (c) kukonza kuchuluka kwa madzi mu matope.

Mtundu wa ntchito:

Starch ether ndi yoyenera mitundu yonse ya (simenti, gypsum, lime-calcium) putty yamkati ndi kunja kwa khoma, komanso mitundu yonse ya matope ozungulira ndi matope opaka pulasitala.

Itha kugwiritsidwa ntchito ngati chosakanizira cha zinthu zopangidwa ndi simenti, zinthu zopangidwa ndi gypsum ndi zinthu zopangidwa ndi lime-calcium. Starch ether imagwirizana bwino ndi zinthu zina zomangira ndi zosakanizira; ndi yoyenera makamaka zomangira zouma monga matope, zomatira, zopaka pulasitala ndi zozungulira. Ma starch ether ndi ma methyl cellulose ether (Tylose MC grades) amagwiritsidwa ntchito limodzi pomanga zouma kuti awonjezere kukhuthala, kapangidwe kolimba, kukana kutsika komanso kusavuta kugwiritsa ntchito. Kukhuthala kwa ma mortar, zomatira, ma plaster ndi ma roll render okhala ndi ma methyl cellulose ether ambiri kungachepe powonjezera ma starch ether.