Mwachidule kagwiritsidwe ka cellulose ether mu utoto wa latex ndi putty

Ma cellulose ether ndi polymer ya cellulose semi-synthetic high molecular polymer, yomwe imasungunuka m'madzi komanso kusungunuka. Zili ndi zotsatira zosiyana m'mafakitale osiyanasiyana. Mwachitsanzo, muzinthu zomangira mankhwala, zimakhala ndi zotsatirazi:

① Wosunga madzi

②Wonenepa

③Kukweza

④Kupanga mafilimu

⑤ Binder

Mu polyvinyl kolorayidi makampani, ndi emulsifier ndi dispersant; mu makampani opanga mankhwala, ndi binder ndi pang'onopang'ono ndi kulamulidwa kumasulidwa chimango zakuthupi, etc. Chifukwa mapadi ali ndi zotsatira zosiyanasiyana zophatikizana, ntchito yake Munda ndi wochuluka kwambiri. Kenako, ndimayang'ana kwambiri kugwiritsa ntchito ndi ntchito ya cellulose ether muzinthu zosiyanasiyana zomangira.

1. Mu utoto wa latex

Mu makampani lalabala utoto kusankha hydroxyethyl mapadi, mfundo ambiri kukhuthala ofanana kukhuthala ndi 30000-50000cps, lofanana ndi HBR250 specifications, ndi buku mlingo zambiri za 1.5 ‰ -2 ‰. Ntchito yaikulu ya hydroxyethyl mu utoto wa latex ndi kukhuthala, kuteteza gelation ya pigment, kuthandizira kubalalika kwa pigment, kukhazikika kwa latex, ndikuwonjezera kukhuthala kwa zigawo, zomwe zimathandiza kuti ntchito yomangayo ikhale yolimba: Hydroxyethyl cellulose ndiyosavuta kugwiritsa ntchito. Ikhoza kusungunuka m'madzi ozizira ndi madzi otentha, ndipo sichikhudzidwa ndi pH mtengo. Itha kugwiritsidwa ntchito mosamala pakati pa PI mtengo 2 ndi 12. Njira zogwiritsira ntchito ndi izi:

I. Onjezani mwachindunji kupanga

Kwa njirayi, mtundu wochedwa wa hydroxyethyl cellulose uyenera kusankhidwa, ndipo mapadi a hydroxyethyl okhala ndi nthawi yosungunuka yopitilira mphindi 30 amagwiritsidwa ntchito. Masitepe ake ndi awa: ① Ikani madzi enaake mumtsuko wokhala ndi chowotchera chometa ubweya wambiri ② Yambani kugwedezeka mosalekeza pa liwiro lotsika, ndipo nthawi yomweyo onjezerani gulu la hydroxyethyl mu yankho mofanana ③Pitirizani kugwedeza mpaka zida zonse za granular zimanyowa ④Onjezani zowonjezera zina ndi zowonjezera zowonjezera, ndi zina zotero. ⑤Limbikitsani mpaka magulu onse a hydroxyethyl atasungunuka kwathunthu, kenaka Onjezani zigawo zina mu formula ndikupera mpaka mankhwala omaliza.

Ⅱ. Zokhala ndi mowa wamayi kuti mudzagwiritse ntchito mtsogolo

Njirayi imatha kusankha mtundu wanthawi yomweyo, ndipo imakhala ndi anti-mildew effect cellulose. Ubwino wa njirayi ndikuti umakhala ndi kusinthasintha kwakukulu ndipo ukhoza kuwonjezeredwa mwachindunji ku utoto wa latex. Njira yokonzekera ndi yofanana ndi masitepe ①-④.

Ⅲ. Pangani phala kuti mudzagwiritse ntchito pambuyo pake

Popeza organic solvents ndi osauka solvents (insoluble) kwa hydroxyethyl, zosungunulira izi angagwiritsidwe ntchito kupanga phala. Zosungunulira zomwe zimagwiritsidwa ntchito kwambiri ndi zamadzimadzi zomwe zimapangidwa ndi utoto wa latex, monga ethylene glycol, propylene glycol, ndi opanga mafilimu (monga diethylene glycol butyl acetate). Phala la hydroxyethyl cellulose likhoza kuwonjezeredwa mwachindunji ku utoto. Pitirizani kusonkhezera mpaka kusungunuka kwathunthu.

Chachiwiri, mu khoma scraping putty

Pakali pano, m'mizinda yambiri m'dziko langa, putty wosamva madzi komanso wosapaka malo otetezedwa ndi chilengedwe wakhala amtengo wapatali kwambiri ndi anthu. Amapangidwa ndi acetal reaction ya vinyl mowa ndi formaldehyde. Choncho, nkhaniyi pang'onopang'ono inathetsedwa ndi anthu, ndi mapadi etere mndandanda mankhwala ntchito m'malo nkhaniyi. Izi zikutanthauza kuti, pakupanga zida zomangira zachilengedwe, cellulose ndiyo yokhayo.

Mu putty yosagwira madzi, imagawidwa m'mitundu iwiri: ufa wowuma wa putty ndi putty phala. Mwa mitundu iwiriyi ya putty, methyl cellulose ndi hydroxypropyl methyl ziyenera kusankhidwa. Mawonekedwe a viscosity nthawi zambiri amakhala pakati pa 40000-75000cps. Ntchito zazikulu za cellulose ndikusunga madzi, kugwirizana ndi kuyamwitsa.

Popeza makonzedwe a putty a opanga osiyanasiyana ndi osiyana, ena ndi imvi kashiamu, kashiamu wopepuka, simenti yoyera, etc., ndipo ena ndi gypsum ufa, imvi kashiamu, calcium kuwala, etc., kotero specifications, mamasukidwe akayendedwe ndi malowedwe a mapadi mu njira ziwiri ndi zosiyana. Ndalama zomwe zawonjezeredwa ndi pafupifupi 2 ‰-3 ‰.