Redispersible polymer hmoov (RDPS) ua lub luag haujlwm tseem ceeb hauv kev lag luam, suav nrog kev tsim kho, cov nplaum, thiab txheej. Cov hmoov no tau siv dav rau kev txhim kho cov khoom ntawm cov xis, txhim kho adhesion, thiab kav ntev. Nkag siab txog cov txheej txheem ntau lawm ntawm RDP yog qhov tseem ceeb rau cov chaw tsim khoom kom paub meej cov khoom lag luam zoo.
Cov Khoom Siv Raw:
Kev tsim cov refispersible hmoov polymer pib nrog ua tib zoo xaiv cov ntaub ntawv raw uas cuam tshuam cov khoom ntawm cov khoom kawg. Thawj lub koom haum muaj cov resins polymer, tiv thaiv kev tiv thaiv, cov hlua khi, thiab ntau yam ntxiv.
Polymer Resins: Ethylene-Vinyl acetate (EVA), Vinyl acetate-Ethylene (VAE), thiab Acrylic Polymer muaj feem ntau siv los ua cov resins loj. Cov khoom siv no muab cov nplaum, yoog raws, thiab dej tsis kam rau RDP.
Kev Tiv Thaiv Kev Tiv Thaiv: Hydrophilic tiv thaiv me me xws li polyvinyl cawv (PVA) lossis cov cellulose cais thaum ziab thiab cia, tiv thaiv kev sib sau ua ke.
Cov hnab yas: cov plyas kom txhim kho qhov hloov thiab ua haujlwm ntawm RDP. Cov roj hmab sib xyaw muaj xws li glycol muaj kev pab yam ntxwv lossis polyethylene glycols.
Ntxiv: Ntau yam ntxiv xws li Dispersants, Thickeners, thiab hla kev sib txuas rau cov khoom tshwj xeeb xws li Dispersibility zoo li dispersibility zoo li dispersibility zoo li dispersibility zoo li dispersibility zoo li dispersibility, rhuaurical, lossis tshuab zog.
Cov txheej txheem:
Kev tsim cov refispersible hmoov polymer muaj ntau yam kev ua cov kauj ruam, suav nrog emulsion oxymerization, thiab cov txheej txheem kev kho mob.
Emulsion Polymerization:
Cov txheej txheem pib nrog emulsion polymerization, qhov chaw nyob, emulsifiers, thiab cov pib sib xyaw ua ke nyob rau hauv kev tswj hwm ntawm kev tswj kom sov thiab siab. Cov monomers polymerize los ua cov tshuaj yas tawg hauv dej. Cov kev xaiv ntawm monomers thiab cov tshuaj tiv thaiv kev txiav txim siab cov polymer muaj pes tsawg leeg thiab cov khoom.
Ruaj khov thiab sib cais:
Tom qab polymerization, cov latex undergoe stabilization los ntawm kev ntxiv tiv thaiv kev tiv thaiv thiab stabilizers. Cov kauj ruam no tiv thaiv kev sib cais ua ke thiab ua kom muaj kev ruaj ntseg ntawm cov latex dispersion. Kev tswj hwm kev ua kom cov neeg sawv cev yuav ua rau muaj kev cuam tshuam nrog cov nplais ntawm cov kua txiv hmab txiv ntoo khov kho.
Txau kom qhuav:
Lub dogilized looj dispersion yog tom qab ntawd noj rau hauv tshuab tshuaj txau. Nyob rau hauv cov tshuaj tsuag kom qhuav chamber, cov dispersion yog atomized rau hauv cov tee dej me me uas siv cov kev siv siab. Cov cua kub yog ib txhij qhia rau yaj cov ntsiab lus dej, tawm tom qab cov khoom polymer. Lub tshuab ziab khaub ncaws, suav nrog Inlet huab cua kub, lub sijhawm nyob hauv tsev, thiab tus nqi dav hlau, cuam tshuam rau cov part porpleology thiab hmoov khoom.
Kev Kho Mob Tom Qab:
Tom qab tsuag tsuag qhuav, lub txiaj ntsig polymer hmoov undergoes cov txheej txheem kho kom zoo nkauj los txhim kho nws cov kev ua tau zoo thiab kev tso tseg ruaj khov. Cov txheej txheem no yuav suav nrog kev hloov kho qhov chaw nyob deb, thiab ntim khoom.
a. Kev hloov kho deg: Cov neeg sawv cev saum npoo av lossis cov chaw ua haujlwm hla los hloov kho cov txheej txheem saum npoo av, txhim kho lawv qhov tawg thiab sib xyaw nrog lwm cov ntaub ntawv.
b. Granulation: txhawm rau txhim kho kev kov thiab tawg, cov polymer hmoov yuav dhau los tsim cov av nplaum thiab txo cov hmoov av tsim.
c. Ntim: Lub thawv kawg yog ntim rau hauv cov dej noo-tiv taus kom tiv thaiv kev nqus dej noo thiab tswj lawv lub sijhawm cia thiab thauj mus los.
Kev tswj kev ntsuas zoo:
Kev tswj hwm zoo yog qhov tseem ceeb thoob plaws hauv cov txheej txheem ntau lawm los xyuas kom meej thiab ntseeg tau cov hmoov ntawm cov hmoov polymer. Ob peb cov cwj pwm tseem ceeb yog cov tshuaj xyuas thiab tswj tau ntawm ntau theem:
Cov Khoom Siv Raw Khoom Noj Ua Si Zoo: Kev tshuaj xyuas cov khoom siv raw, suav nrog cov polymers, thiab ntxiv, ua kom paub meej, thiab sib xyaw nrog cov ntawv thov.
Kev Tshuaj Ntsuam Xyuas: Cov txheej txheem tseem ceeb xws li cov tshuaj tiv thaiv kub, thiab cov kev kho kom qhuav yog kho kom tau cov khoom lag luam zoo thiab muaj zog.
Cov cim yuam kev: particle loj faib tawm, morphology, thiab cov khoom siv polymer ntawm cov qauv siv hluav taws xob, hluav taws xob tsom iav, thiab sab nraud.
Kev kuaj mob: Tus refispersible polymer hmoov kev sim tshuaj xyuas lawv cov nplaum ua kom zoo nkauj, thiab cov neeg ua haujlwm raws li cov qauv kev lag luam thiab cov neeg siv khoom.
Kev Kuaj Xyuas Kev Nyab Xeeb: Cov kev xeem sai thiab kev saib xyuas kev ruaj khov yog ua los ntsuas qhov chaw khaws cia ntev ntev ntawm RDPs nyob rau ntau qhov chaw cia khoom, suav nrog qhov kub thiab vaum.
Kev tsim cov refispersible hmoov polymer cuam tshuam nrog cov txheej txheem nyuaj, los ntawm emulsion polascerization kom ua tshuaj tsuag thiab tom qab cov txheej txheem kho mob. Los ntawm kev ua tib zoo tswj cov ntaub ntawv raw, ua cov tsis muaj zog, thiab kev tswj hwm zoo ntawm RDPs hauv kev tsim kho, cov tshuaj nplaum, thiab kev lag luam ntau. Nkag siab txog cov intricacies ntawm cov txheej txheem ntau lawm yog qhov tseem ceeb rau kev ua cov yam ntxwv cov yam ntxwv thiab ua kom tau cov kev xav tau ntawm cov neeg siv khoom hauv kev ua lag luam.
Lub Sijhawm Post: Mar-12-2024