Kodi ntchito ya ether ya cellulose ndi yotani m'magawo osiyanasiyana?

Cellulose etherndi polima ya molekyulu yopangidwa ndi semi-synthetic yokhala ndi mamolekyulu ambiri, yomwe imasungunuka m'madzi komanso imasungunuka ndi zosungunulira. Ili ndi zotsatira zosiyanasiyana m'mafakitale osiyanasiyana. Mwachitsanzo, mu zipangizo zomangira mankhwala, ili ndi zotsatira zotsatirazi:

① Chosungira madzi, ②Chokhuthala, ③Katundu wolinganiza, ④Katundu wopanga mafilimu,

⑤ Chomangira

Mu makampani opanga polyvinyl chloride, ndi emulsifier ndi dispersant; mu makampani opanga mankhwala, ndi binder komanso zinthu zotulutsa pang'onopang'ono komanso zolamulidwa, ndi zina zotero. Chifukwa cellulose ili ndi zotsatira zosiyanasiyana zophatikizika, ntchito yake ndi yofala kwambiri. Kenako, ndiyang'ana kwambiri pa kagwiritsidwe ntchito ndi ntchito ya cellulose ether mu zipangizo zosiyanasiyana zomangira.

Iutoto wa latex

Mu makampani opanga utoto wa latex, posankha hydroxyethyl cellulose, kufotokozera kwa viscosity yofanana ndi 30000-50000cps, komwe kumagwirizana ndi specification ya HBR250, ndipo mlingo wofunikira nthawi zambiri umakhala pafupifupi 1.5‰-2‰. Ntchito yayikulu ya hydroxyethyl mu utoto wa latex ndikukhuthala, kuletsa gelation ya pigment, kuthandiza kufalikira kwa pigment, kukhazikika kwa latex, ndikuwonjezera viscosity ya zigawo, zomwe zimathandiza pakugwira ntchito bwino kwa kapangidwe kake: Hydroxyethyl cellulose ndiyosavuta kugwiritsa ntchito. Itha kusungunuka m'madzi ozizira kapena m'madzi otentha, ndipo siyikhudzidwa ndi pH. Itha kugwiritsidwa ntchito mosamala pakati pa PI value 2 ndi 12. Njira zogwiritsira ntchito ndi izi:

1. Onjezani mwachindunji mu kupanga

Njira iyi, hydroxyethyl cellulose delayed mtundu uyenera kusankhidwa, ndipo hydroxyethyl cellulose yokhala ndi nthawi yosungunuka ya mphindi zoposa 30 imagwiritsidwa ntchito. Njira zake ndi izi: ① Ikani madzi oyera pang'ono mu chidebe chokhala ndi agitator yodula kwambiri ② Yambani kusakaniza mosalekeza pa liwiro lotsika, ndipo nthawi yomweyo onjezerani pang'onopang'ono gulu la hydroxyethyl mu yankho mofanana ③Pitirizani kusakaniza mpaka zinthu zonse za granular zitanyowa ④Onjezani zowonjezera zina ndi zowonjezera zoyambira, ndi zina zotero. ⑤Sakanizani mpaka magulu onse a hydroxyethyl atasungunuka kwathunthu, kenako onjezerani zigawo zina mu fomula ndikupukuta mpaka chinthu chomalizidwa.

2. Yokhala ndi mowa wothira madzi kuti mugwiritse ntchito pambuyo pake

Njira iyi ingasankhe mtundu wa instant, ndipo ili ndi anti-mildew effect cellulose. Ubwino wa njira iyi ndikuti imakhala yosinthasintha kwambiri ndipo imatha kuwonjezeredwa mwachindunji ku utoto wa latex. Njira yokonzekera ndi yofanana ndi masitepe ①-④.

3. Pangani phala kuti mudzagwiritse ntchito mtsogolo

Popeza zosungunulira zachilengedwe sizisungunuka bwino (sizisungunuka) za hydroxyethyl, zosungunulirazi zingagwiritsidwe ntchito popanga phala. Zosungunulira zachilengedwe zomwe zimagwiritsidwa ntchito kwambiri ndi zakumwa zachilengedwe zomwe zimapezeka mu utoto wa latex, monga ethylene glycol, propylene glycol, ndi zinthu zopangira filimu (monga diethylene glycol butyl acetate). Porridge ya hydroxyethyl cellulose ikhoza kuwonjezeredwa mwachindunji ku utoto. Pitirizani kusakaniza mpaka itasungunuka kwathunthu.

In putty

Pakadali pano, m'mizinda yambiri m'dziko langa, anthu amaona kuti putty yosalowa madzi komanso yosawononga chilengedwe ndi yofunika kwambiri. Imapangidwa ndi acetal reaction ya vinyl alcohol ndi formaldehyde. Chifukwa chake, anthu amachotsa pang'onopang'ono zinthuzi, ndipo zinthu za cellulose ether zimagwiritsidwa ntchito m'malo mwa zinthuzi. Izi zikutanthauza kuti, popanga zipangizo zomangira zosawononga chilengedwe, cellulose ndiye chinthu chokhacho chomwe chimagwiritsidwa ntchito.

Mu putty yosalowa madzi, imagawidwa m'mitundu iwiri: putty youma ndi putty phala. Pakati pa mitundu iwiri ya putty iyi, methyl cellulose ndi hydroxypropyl methyl ziyenera kusankhidwa. Ma specification a viscosity nthawi zambiri amakhala pakati pa 40000-75000cps. Ntchito zazikulu za cellulose ndi kusunga madzi, kugwirizana ndi mafuta.

Popeza ma formula a putty a opanga osiyanasiyana ndi osiyana, ena ndi imvi calcium, calcium yopepuka, simenti yoyera, ndi zina zotero, ndipo ena ndi ufa wa gypsum, calcium yoyera, calcium yopepuka, ndi zina zotero, kotero kufotokozera, kukhuthala ndi kuchuluka kwa cellulose komwe kwasankhidwa ndi ma formula awiriwa nakonso n'kosiyana. Kuchuluka komwe kwawonjezeredwa ndi pafupifupi 2‰-3‰.