Hmoov Polymer uas yaj tau dua (RDP)yog ib yam khoom ua los ntawm kev ziab polymer emulsion, uas feem ntau siv rau hauv cov ntaub ntawv xws li kev tsim kho, txheej, nplaum, thiab cov nplaum pobzeb. Nws lub luag haujlwm tseem ceeb yog rov ua dua rau hauv emulsion los ntawm kev ntxiv dej, muab kev nplaum zoo, elasticity, tiv taus dej, tiv taus tawg, thiab tiv taus huab cua.
Cov khoom sib xyaw ntawm Redispersible Polymer Hmoov (RDP) tuaj yeem tshuaj xyuas los ntawm ntau yam, feem ntau suav nrog cov khoom hauv qab no:
1. Cov tshuaj polymer
Cov khoom tseem ceeb ntawm Redispersible Polymer Hmoov yog polymer resin, uas feem ntau yog cov polymer tau los ntawm emulsion polymerization. Cov polymer resins feem ntau suav nrog:
Polyvinyl cawv (PVA): muaj cov khoom nplaum zoo thiab cov khoom ua zaj duab xis thiab siv dav hauv cov ntaub ntawv tsim kho.
Polyacrylates (xws li polyacrylates, polyurethanes, thiab lwm yam): muaj kev ywj pheej zoo heev, lub zog sib txuas, thiab kev tiv thaiv dej.
Polystyrene (PS) los yog ethylene-vinyl acetate copolymer (EVA): feem ntau siv los txhim kho cov khoom ua zaj duab xis, ua kom tsis txhob muaj dej ntau, thiab tiv taus huab cua.
Polymethyl methacrylate (PMMA): Cov polymer no muaj kev tiv thaiv kev laus thiab pob tshab zoo.
Cov polymer resins no tsim cov emulsions los ntawm cov tshuaj polymerization, thiab tom qab ntawd cov dej hauv cov emulsion raug tshem tawm los ntawm kev tsuag kom qhuav lossis khov kom qhuav, thiab thaum kawg tau txais Redispersible Polymer Hmoov (RDP) hauv daim ntawv hmoov.
2. Cov tshuaj surfactants
Yuav kom tswj tau qhov ruaj khov ntawm cov khoom polymer thiab tsis txhob muaj kev sib sau ua ke hauv cov hmoov, yuav ntxiv cov surfactants kom tsim nyog thaum lub sijhawm tsim khoom. Lub luag haujlwm ntawm surfactants yog txo qhov nro ntawm qhov chaw ntawm cov khoom me me thiab pab cov khoom me me tawg hauv dej. Cov surfactants feem ntau suav nrog:
Cov tshuaj surfactants uas tsis yog ionic (xws li polyethers, polyethylene glycols, thiab lwm yam).
Cov tshuaj anionic surfactants (xws li cov ntsev fatty acid, alkyl sulfonates, thiab lwm yam).
Cov surfactants no tuaj yeem txhim kho qhov kev sib kis ntawm Redispersible Polymer Powder (RDP) s, uas tso cai rau cov hmoov latex rov ua dua ib qho emulsion tom qab ntxiv dej.
3. Cov khoom sau thiab cov khoom ua kom tuab
Yuav kom kho qhov ua tau zoo ntawm cov hmoov latex thiab txo cov nqi, qee cov khoom sau thiab cov khoom ua kom tuab kuj tseem yuav raug ntxiv thaum lub sijhawm tsim khoom. Muaj ntau hom khoom sau, thiab cov uas feem ntau suav nrog:
Calcium carbonate: ib qho khoom siv inorganic filler uas feem ntau siv uas tuaj yeem ua rau kom lo rau thiab txhim kho kev siv nyiaj.
Talc: tuaj yeem ua rau kom cov khoom siv tsis yooj yim tawg thiab tawg.
Cov zaub mov silicate: xws li bentonite, nthuav dav graphite, thiab lwm yam, tuaj yeem txhim kho qhov tawg tsis kam thiab dej tsis kam ntawm cov khoom.
Cov tshuaj ua kom tuab feem ntau yog siv los kho qhov viscosity ntawm cov khoom kom hloov kho nws rau ntau yam kev tsim kho. Cov tshuaj ua kom tuab feem ntau suav nrog hydroxypropyl methylcellulose (HPMC) thiab polyvinyl cawv (PVA).
4. Tus neeg sawv cev tiv thaiv kev sib sau ua ke
Hauv cov khoom hmoov, txhawm rau tiv thaiv kev sib sau ua ke thaum lub sijhawm khaws cia thiab thauj mus los, cov neeg sawv cev tiv thaiv kev sib sau ua ke kuj tseem yuav raug ntxiv thaum lub sijhawm tsim khoom. Cov neeg sawv cev tiv thaiv kev sib sau ua ke feem ntau yog qee cov khoom tsis muaj zog, xws li txhuas silicate, silicon dioxide, thiab lwm yam. Cov tshuaj no tuaj yeem tsim ib daim zaj duab xis tiv thaiv rau ntawm qhov chaw ntawm cov hmoov latex kom tiv thaiv cov khoom me me los ntawm kev sib sau ua ke.
5. Lwm yam khoom ntxiv
Hmoov Polymer Redispersible (RDP) kuj tseem yuav muaj qee cov khoom ntxiv tshwj xeeb los txhim kho cov khoom tshwj xeeb:
Tus neeg sawv cev tiv taus UV: txhim kho kev tiv thaiv huab cua thiab kev tiv thaiv kev laus ntawm cov khoom.
Tus neeg sawv cev tua kab mob: txo qhov kev loj hlob ntawm cov kab mob me me, tshwj xeeb tshaj yog thaum siv rau hauv qhov chaw noo noo.
Plasticizer: txhim kho qhov yooj ywm thiab tawg tsis kam ntawm cov hmoov latex.
Tshuaj Tiv Thaiv Kev Khov: Tiv thaiv cov khoom kom tsis txhob khov rau hauv qhov chaw kub qis, cuam tshuam rau kev tsim kho thiab kev siv.
6. Cov dej noo
Txawm hais tias Redispersible Polymer Hmoov (RDP) yog nyob rau hauv daim ntawv ntawm cov hmoov qhuav, nws kuj xav tau qee qhov kev tswj hwm dej noo thaum lub sijhawm tsim khoom, thiab cov dej noo feem ntau raug tswj hwm qis dua 1%. Cov dej noo tsim nyog pab tswj kom cov hmoov ntawd fluidity thiab ruaj khov mus sij hawm ntev.
Lub luag haujlwm thiab kev ua tau zoo ntawm Redispersible Polymer Hmoov (RDP)
Lub luag haujlwm tseem ceeb ntawm Redispersible Polymer Hmoov (RDP) yog tias nws tuaj yeem rov ua dua los ua cov emulsion tom qab ntxiv dej, thiab muaj cov yam ntxwv tseem ceeb hauv qab no:
Kev nplaum zoo heev: Txhim kho lub peev xwm sib txuas ntawm cov xim pleev thiab cov nplaum, thiab txhim kho lub zog sib txuas ntawm cov ntaub ntawv tsim kho.
Kev ywj pheej thiab kev ywj pheej: Txhim kho qhov elasticity ntawm cov txheej, txhim kho nws qhov kev tawg tsis kam thiab kev cuam tshuam tsis kam.
Kev tiv thaiv dej: Txhim kho qhov tiv thaiv dej ntawm cov khoom, tsim nyog rau kev siv rau sab nraum zoov lossis cov chaw noo noo.
Kev tiv thaiv huab cua: Txhim kho cov khoom siv tiv thaiv UV, tiv thaiv kev laus thiab lwm yam khoom, thiab txuas nws lub neej kev pabcuam.
Kev tiv thaiv kab nrib pleb: Nws muaj kev tiv thaiv kab nrib pleb zoo thiab tsim nyog rau kev tiv thaiv kev tawg hauv cov haujlwm tsim kho.
RDPyog ua los ntawm kev hloov cov polymer emulsion mus ua hmoov los ntawm cov txheej txheem nyuaj. Nws muaj ntau yam khoom zoo heev thiab siv dav hauv kev tsim kho, txheej txheej, nplaum thiab lwm yam teb. Kev xaiv thiab qhov sib piv ntawm nws cov khoom xyaw ncaj qha cuam tshuam rau nws qhov kev ua tau zoo kawg.
Lub sijhawm tshaj tawm: Lub Peb Hlis-11-2025