Zvisanganiswa zvine basa guru mukuvandudza mashandiro ekuvaka dhaka rakasanganiswa nemvura. Izvi zvinotevera zvinoongorora uye zvinoenzanisa hunhu hwehupfu hwelatex necellulose, uye zvinoongorora mashandiro ezvigadzirwa zvedhaka rakasanganiswa nemvura uchishandisa zvisanganiswa.
Upfu hwelatex hunonyungudika zvakare
Upfu hwelatex hunonyungudika zvakareinogadziriswa nekuomeswa nespray ye special polymer emulsion. Upfu hwelatex hwakaomeswa hunenge huine zvidimbu zvakatenderera zve 80 ~ 100mm zvakaunganidzwa pamwe chete. Zvikamu izvi zvinonyungudika mumvura uye zvinoumba kupararira kwakasimba kwakakura zvishoma pane zvimedu zvepakutanga zve emulsion, izvo zvinoumba firimu mushure mekushaya mvura uye kuoma.
Matanho akasiyana ekugadzirisa anoita kuti upfu hwelatex hunonyungudika huve nehunhu hwakasiyana hwakadai sekudzivirira mvura, kurwisa alkali, kudzivirira mamiriro ekunze uye kuchinjika. Upfu hwelatex hunoshandiswa mudura hunogona kuvandudza kupesana nekukanganiswa, kugara kwenguva refu, kuramba kupera, nyore kuvaka, simba rekubatana uye kubatana, kuramba mamiriro ekunze, kuramba kuomeswa nechando, kudzivirira mvura, kusimba kwekukotama uye kusimba kwekuchinjika kwedura.
Cellulose ether
Cellulose ether izwi rekuti zvigadzirwa zvinogadzirwa nekuita kwealkali cellulose uye etherifying agent pasi pemamwe mamiriro. Alkali cellulose inotsiviwa nemaether akasiyana e ether kuti iwane ether dzakasiyana dze cellulose. Zvichienderana nehunhu hwe ionization hwezvinhu zvinotsiva, ether dze cellulose dzinogona kukamurwa muzvikamu zviviri: ionic (senge carboxymethyl cellulose) uye non-ionic (senge methyl cellulose). Zvichienderana nerudzi rwe substituent, ether ye cellulose inogona kukamurwa kuita monoether (senge methyl cellulose) uye mixed ether (senge hydroxypropyl methyl cellulose). Zvichienderana nekunyungudika kwakasiyana, inogona kukamurwa kuita water-soluble (senge hydroxyethyl cellulose) uye organic solvent-soluble (senge ethyl cellulose), nezvimwewo. Dry-mixed mortar inonyanya kunyungudika mumvura, uye water-soluble cellulose yakakamurwa kuita instant type uye surface treated delayed dissolve type.
Maitiro ekuita kwe cellulose ether mudhaka ndeaya anotevera:
(1) Mushure meether ye celluloseMudhaka unonyungudutswa mumvura, kupararira kwakafanana uye kunoshanda kwezvinhu zvinosimbisa mudhaka kunovimbiswa nekuda kwebasa repamusoro, uye cellulose ether, se colloid inodzivirira, "inoputira" zvidimbu zvakasimba uye Rutivi rwefirimu rinozora runoumbwa pamusoro paro wekunze, izvo zvinoita kuti dhaka rigadzikane, uye zvakare inovandudza kuyerera kwedhaka panguva yekusanganisa uye kutsetseka kwekuvaka.
(2) Nekuda kwemaumbirwo ayo emamorekuru, mhinduro ye cellulose ether inoita kuti mvura iri mumota isarasikirwe nyore nyore, uye inoiburitsa zvishoma nezvishoma kwenguva yakareba, zvichiita kuti mota irambe iine mvura uye inokwanisa kushanda zvakanaka.
faibha yehuni
Fiber yehuni inogadzirwa nemiti sezvinhu zvikuru uye inogadziriswa netekinoroji dzakasiyana-siyana, uye mashandiro ayo akasiyana neaya e-cellulose ether. Hunhu hukuru ndehwekuti:
(1) Hainyungudike mumvura nemuzvinhu zvinonyungudutsa, uye hainyungudikewo muzvinhu zvine acid isina simba nemuzvinhu zvine base isina simba
(2) Kana ikashandiswa mudura, inopindirana kuita chimiro chemativi matatu muchimiro chisingachinji, inowedzera thixotropy uye kuramba kudonha kwedura, uye inovandudza kugadzirwa kwayo.
(3) Nekuda kwechimiro chefiber yehuni chine mativi matatu, ine hunhu hwe "water-locking" mudhaka rakasanganiswa, uye mvura iri mudhaka haizonyungudike kana kubviswa zviri nyore. Asi haina cellulose ether inochengetedza mvura yakawanda.
(4) Mhedzisiro yakanaka yefiber yehuni mu capillary ine basa re "kufambisa mvura" mudura, izvo zvinoita kuti pamusoro nemukati medura zvive zvakafanana, nokudaro zvichideredza kuputika kunokonzerwa nekusawirirana kwekutsvedza.
(5) Fiber yehuni inogona kuderedza kushushikana kwekuchinja kwesimbi yakaoma uye kuderedza kupwanyika nekutsemuka kwesimbi.
Nguva yekutumira: Kubvumbi-25-2024