Zvigadzirwa zvevhitamini zvese zvakatorwa kubva kune zvakasikwa donje pulp kana huni pulp, izvo zvinogadzirwa kuburikidza ne etherification.Zvigadzirwa zvakasiyana zve cellulose zvinoshandisa akasiyana etherifying agents.Iyo etherifying agent inoshandiswa muhydroxyethyl cellulose (HEC) inonzi ethylene oxide, uye iyo etherifying agent inoshandiswa muhydroxypropyl methylcellulose (HPMC) mamwe marudzi eetherifying agents.(chloromethane uye propylene oxide).
Mune chaiyo szone pendi uye latex pendi, hydroxyethyl cellulose inogona kushandiswa seyakakora.
Pendi chaiyo yematombo iri nyore kudonha nekuda kwehuwandu hwayo hwekuunganidzwa uye hukuru hwakanyanya.Izvo zvinodikanwa kuwedzera thickener kuti iwedzere viscosity yayo kuti isangane neiyo viscosity inodiwa pakupfapfaidza panguva yekuvaka, kuvandudza kwayo kuchengetedza kugadzikana, uye kuwana rimwe simba.
Kana iwe uchida pende chaiyo yematombo kuti uwane simba rakanaka, kumira zvakanaka kwemvura uye kusagadzikana kwemamiriro ekunze, kusarudzwa kwezvinhu zvakasvibirira uye kugadzirwa kwemaitiro zvakakosha zvikuru.
Mumamiriro ezvinhu akajairika, chiyero che emulsion chinoshandiswa mumhando yepamusoro yepende yematombo chaiyo ichave yakakwira.
Semuenzaniso, mune tani yepende chaiyo yematombo, panogona kunge paine 300kg ye pure acrylic emulsion uye 650kg yejecha rematombo ane mavara echisikigo.Kana iyo yakasimba ye emulsion iri 50%, huwandu hwe300kg emulsion mushure mekuoma inenge 150 litres, uye huwandu hwe650kg yejecha inenge 228 malita.Izvi zvinoreva kuti, iyo PVC (pigment volume concentration) yepende chaiyo yematombo ndeye 60% panguva ino, nokuti zvidimbu zvejecha rine ruvara zvakakura uye hazvina kumira muchimiro, uye pasi pemamiriro eimwe particle size kugoverwa, yakaomeswa. pendi chaiyo yematombo inogona kunge iri muCPVC (critical mass concentration).Pigment volume concentration) approx.Nekuda kwekukora, kana ukasarudza cellulose ine viscosity yakakodzera, pendi yedombo chaiyo inogona kuumba firimu rependi rakakwana uye rakakora kuti rizadzise matatu makuru ekuita zvinodiwa zvependi yedombo chaiyo.Kana zviri mukati meiyo chaiyo ibwe pendi emulsion yakaderera, zvinokurudzirwa kushandisa cellulose ine yakakwira viscosity seyakakora (senge 100,000 viscosity), kunyanya mushure mekunge mutengo we cellulose ukawedzera, izvo zvinogona kuderedza huwandu hweserulosi hunoshandiswa uye kuita ibwe chairo Kuita kwepende kuri nani.
Vamwe vagadziri vependi yematombo ehupfumi vanoshandisa hydroxypropyl methylcellulose pachinzvimbo chehydroxyethyl cellulose pamutengo uye zvimwe zvinhu.
Kana ichienzaniswa nemhando mbiri dze cellulose, hydroxyethyl cellulose ine nani kuchengetedza mvura, haizorasikirwe nekuchengetwa kwemvura nekuda kwegelatin pakupisa kwepamusoro, uye ine kumwe kupikisa ukuru.Pakufunga nezvekuita, zvinokurudzirwa kushandisa hydroxyethyl cellulose ine viscosity ye100,000 seyakakora yependi yematombo chaiwo.
Nguva yekutumira: Kubvumbi-28-2023