Chinotisa pendi yelatex chinofanira kunge chiine hukama hwakanaka ne emulsion polymer compound, zvikasadaro firimu rekufukidza richava ne reticulate shoma, uye richagadzira kuungana kwe particles kusingadzoreki, izvo zvinoderedza viscosity uye kukura kwe particles. Chinotisa pendi chichachinja chaji ye emulsion. Semuenzaniso, cationic thickener ichave nemhedzisiro isingadzoreki pa anionic emulsifier kuti iparadze emulsion. Chinotisa pendi yelatex chakakodzera chinofanira kunge chine zvinotevera:
1. Chipimo chakaderera uye kunaka kwekupenya
2. Kugadzikana kwakanaka kwekuchengetedza, hapana kudzikiswa kwe viscosity nekuda kwebasa rema enzymes, uye hapana kudzikiswa kwe viscosity nekuda kwekuchinja kwetembiricha uye kukosha kwePH
3, kuchengetedza mvura zvakanaka, hapana pachena chiitiko chebubble
4. Hapana migumisiro yakaipa pahunhu hwefirimu hwakadai sekudzivirira kukwesha, kupenya, simba rekuviga uye kudzivirira mvura
5. Hapana kutenderera kwepigment
Tekinoroji yekukora kwependi yelatex inzira yakakosha yekuvandudza mhando yelatex uye kuderedza mutengo. Hydroxyethyl cellulose chinhu chakanakira kukora, chine mabasa akawanda pakuita kuti pendi yelatex ikora, igare yakasimba uye igadziriswe nerheological.
Mukugadzirwa kwependi yelatex,hydroxyethyl cellulose (HEC)Inoshandiswa semushonga unoparadzanisa, unosimbisa uye unomisa pigment kuti usimbise viscosity yechigadzirwa, kuderedza agglomeration, kuita kuti pendi iite soft uye soft, uye zvakare inoita kuti pendi yelatex igare kwenguva refu. Yakanaka, inogona kumira yakasimba, uye inogona kupa leveling yakanaka, resistance yekukwenya uye kufanana kwepigment. Panguva imwe chete, HEC inoshanda zvakanaka, uye pendi yelatex yakakora neHEC ine pseudoplasticity, saka nzira dzekuvaka dzakadai sekukwesha, kutenderedza, kuzadza, uye kupfapfaidza dzine zvakanakira zvekuchengetedza basa, hazvisi nyore kuchenesa uye kudonha, uye kusaswa zvishoma. HEC ine kukura kwakanaka kwemavara. Inokwanisa kusanganiswa zvakanaka nemavara akawanda uye ma binders, zvichiita kuti zvikwanisike kugadzira pendi yelatex ine kugadzikana kwakanaka uye kugadzikana. Nekushandiswa kwakasiyana-siyana mukugadzira, i non-ionic ether. Saka, inogona kushandiswa muhuwandu hwakakura hwe pH (2 ~ 12), uye inogona kusanganiswa nezvikamu zvependi dzelatex dzakadai se reactive pigments, additives, soluble salts kana electrolytes.
Hapana mhedzisiro yakaipa pafirimu rekuputira. Nekuti mvura yeHEC ine hunhu hwakajeka hwekumanikidzwa kwemvura pamusoro, hazvisi nyore kupupuma furo panguva yekugadzira nekuvaka, uye maitiro emakomba emakomo anoputika nepaburi repamusoro haasi madiki.
Kugara zvakanaka kwekuchengetedza. Mukuchengetedza kwenguva refu, ruvara runogona kupararira uye kusungirirwa, uye hapana dambudziko reruvara rwunoyangarara uye kutumbuka. Kana pendi isina mvura yakawanda uye tembiricha yekuchengetera inochinja zvakanyanya. Kusviba kwayo kuchiri kugadzikana.
HEC inogona kuwedzera kukosha kwePVC (huwandu hwepigment) kusvika pa50-60%. Pamusoro pezvo, chinhu chinosimbisa pendi ine mvura chinogonawo kushandisa HEC.
Parizvino, zvinogocha zvinoshandiswa mukupenda kwe latex yepamusoro-soro zvinotengeswa kunze kwenyika ne HEC uye acrylic polymers (kusanganisira polyacrylates, homopolymer kana copolymer emulsion thickeners dze acrylic acid uye methacrylic acid).
Hydroxyethyl cellulose inogona kushandiswa
1. Seguruu rinoparadzira kana rinodzivirira
Kazhinji, HEC ine viscosity ye10 kusvika 30 mPaS inoshandiswa. HEC inosvika 300mPa·S inogona kushandiswa pamwe chete neanionic kana cationic surfactants, uye dispersion effect iri nani. Huwandu hwereferensi hunowanzova 0.05% yehuremu hwemonomer.
2, sechinosimbisa
Shandisa 15000mPa. Chiyero che HEC ine viscosity yakakwira pamusoro pe s i0.5 kusvika 1% yehuwandu hwese hwe latex coating, uye kukosha kwePVC kunogona kusvika 60%. Mu pendi ye latex, HEC inosvika 20Pa,s inoshandiswa, uye hunhu hwakasiyana hwe pendi ye latex ndihwo hwakanakisa. Mutengo wekushandisa HEC pamusoro pe 30O00Pa.s wakaderera. Zvisinei, kuenzana uye humwe hunhu hwe latex pendi hazvina kunaka. Kubva pamaonero ezvinodiwa zvemhando yepamusoro uye kudzikiswa kwemari, zvakanakisa kushandisa HEC yepakati neyakakwira pamwe chete.
3. Nzira yekubatanidza pendi yelatex
HEC yakagadziriswa pamusoro inogona kuwedzerwa muupfu hwakaoma kana muchimiro cheslurry. Upfu hwakaoma hunowedzerwa zvakananga pakukuya kwepigment. pH yenzvimbo yekuwedzera inofanira kuva 7 kana pasi. Zvikamu zvealkaline zvakaita sedispersants zvinogona kuwedzerwa mushure meHECyakanyoroveswa uye yakapararira zvizere. Slurry yakagadzirwa neHEC inofanira kusanganiswa muslurry HEC isati yawana nguva yakakwana yekunyorovesa uye yakakora kusvika yave mamiriro asingachashandiswi. Slurry dzeHEC dzinogonawo kugadzirwa ne glycol-based coalescing agents.
4. Pendi ye latex inorwisa ganda risinganyanyi kukora
HEC inonyungudika mumvura inoora kana ikasangana nemolds dzakagadzirwa ne cellulose nezvimwe zvinobva mairi. Kuwedzera zvinochengetedza pakupenda chete hazvina kukwana, zvese zvinoumba zvinofanira kunge zvisina ma enzymes. Magadzirirwo ependi ye latex anofanirwa kucheneswa uye kurongeka, uye michina yese inofanira kugara ichicheneswa ne 0.5% formalin kana 0.1% mercury solution.
Nguva yekutumira: Kubvumbi-25-2024