Zvigadzirwa zvemavhitamini zvese zvinobva mudonje remuchisikigo kana kuti huni, izvo zvinogadzirwa kuburikidza ne etherification. Zvigadzirwa zvakasiyana zve cellulose zvinoshandisa etherifying agents dzakasiyana. Etherifying agent inoshandiswa mu hydroxyethyl cellulose (HEC) i ethylene oxide, uye etherifying agent inoshandiswa mu hydroxypropyl methylcellulose (HPMC) mamwe marudzi e etherifying agents. (chloromethane ne propylene oxide).
Mupendi chaiyo ye szone ne latex, hydroxyethyl cellulose inogona kushandiswa se thickener.
Pendi chaiyo yematombo iri nyore kudonha nekuda kwehuwandu hwayo hwakawanda uye kugona kwayo kukuru. Zvakakosha kuwedzera chinhu chinoigovanisa kuti iwedzere kunaka kwayo kuti isvike kunaka kunodiwa pakupfapfaidza panguva yekuvaka, kuvandudza kugadzikana kwayo, uye kuwana simba rakati.
Kana uchida kuti pendi yematombo chaiyo iwane simba rakanaka, inodzivirira mvura zvakanaka uye inodzivirira mamiriro ekunze, kusarudzwa kwezvinhu zvakagadzirwa uye dhizaini yefomura yacho zvakakosha zvikuru.
Mumamiriro ezvinhu akajairwa, huwandu hwe emulsion hunoshandiswa mupendi yematombo chaiyo yemhando yepamusoro huchava hwakakwira.
Semuenzaniso, mupendi yematombo chaiwo ine tani, panogona kunge paine 300kg ye emulsion yakachena ye acrylic uye 650kg yejecha rematombo rine ruvara rwechisikigo. Kana huwandu hwakasimba hwe emulsion huri 50%, huwandu hwe300kg ye emulsion mushure mekuomeswa hunosvika marita 150, uye huwandu hwe650kg yejecha hunosvika marita 228. Izvi zvinoreva kuti, PVC (pigment volume concentration) yependi yematombo chaiyo i60% panguva ino, nekuti zvidimbu zvejecha rine ruvara zvakakura uye hazvina kurongeka, uye pasi pemamiriro ekugoverwa kwehukuru hwezvidimbu, pendi yematombo chaiyo yakaomeswa inogona kunge iri muCPVC (critical mass concentration). Pigment volume concentration) inenge. Kana tichitaura nezve thickener, kana ukasarudza cellulose ine viscosity yakakodzera, pendi yematombo chaiyo inogona kugadzira firimu rependi rakakwana uye rakakora kuti isangane nezvinodiwa zvitatu zvikuru zve pendi yematombo chaiyo. Kana huwandu hwependi yematombo chaiyo hwakaderera, zvinokurudzirwa kushandisa cellulose ine viscosity yakakwira sechinotisa (senge viscosity 100,000), kunyanya mushure mekunge mutengo we cellulose wawedzera, izvo zvinogona kuderedza huwandu hwe cellulose inoshandiswa uye kugadzira dombo chairo. Kushanda kwependi kuri nani.
Vamwe vagadziri vependi yematombo chaiwo inodhura vanoshandisa hydroxypropyl methylcellulose pachinzvimbo chehydroxyethyl cellulose nekuda kwemutengo nezvimwe zvinhu.
Zvichienzaniswa nemhando mbiri dze cellulose, hydroxyethyl cellulose inochengetedza mvura zviri nani, hairasikirwe nemvura nekuda kwegelatin pakupisa kwakanyanya, uye ine simba rekudzivirira mildew. Kuti utarise mashandiro ayo, zvinokurudzirwa kushandisa hydroxyethyl cellulose ine viscosity ye100,000 sechinokora pendi chaiyo yematombo.
Nguva yekutumira: Kubvumbi-28-2023