I-Pelyperble Pelmer Powder (RDP)kuyindlela eyimpuphu ye-latex engavuselelwa kabusha ngamanzi ukwakha ukusakazwa okuzinzile. Kuvame ukusetshenziswa ekwakheni, ikakhulukazi ekwakhekeni kwezikhangiso, ama-tile grouts, upende kanye nokumbona. I-powder ihlinzeka ngezinzuzo ezahlukahlukene, njengokuthuthukisa ukuguquguquka, ukunamathela, ukumelana kwamanzi, nokuqina.
1. I-polymer (isakhi esiyinhloko)
Isithako esiyisihluthulelo e-Redisperserble Powder Powder iyi-polymer, imvamisa i-latex eyenziwe nge-polyvinyl acetate (PVA), i-styrene-buthadiene rubber (i-Styrene-buteine (SBR), i-Ethylene-Vinyl Acetate (EVA), noma inhlanganisela yalokhu. I-polymer yakha umgogodla wokuhlakazwa lapho i-powder ishiywe kabusha.
I-Polyvinyl Acetate (PVA):Imvamisa esetshenziswa ezinamathelayo kanye nezimbobo ngenxa yezakhiwo zayo ezinamathela.
I-styrere-buthadiene rubber (SBR):Okuvamile kwizicelo zokwakha ngenxa yokuguquguquka kwayo nokuqina.
I-Ethylene-vinyl acetate (EVA):Yaziwa nge-elasticity yayo kanye nezindawo ezinamathela, ezivame ukusetshenziswa ezinhlelweni eziguqukayo.
Indima:Lapho amanzi efakwa ku-powder, ama-molecule e-polymer avuselele futhi akha ukusakazwa okuzinzile, ukuhlinzeka ngezakhiwo ezifunwayo ezifana nokunamathela, ukuguquguquka nokumelana namanzi.
2. Ama-Surfactants (ama-ejenti asabalalisa)
Ama-surfactants angamakhemikhali asiza ekuqiniseni i-powder ye-latex, eqinisekisa ukuthi ihlala ihluke emanzini ngemuva kokuvuselelwa. Banciphisa ukungezwani okungaphezulu phakathi kwezinhlayiya, kusiza inqubo yokuhlakazeka kanye nokwenza ngcono ukusebenza kwe-powder.
Ama-Surfactants angezona athi:Lokhu kuvame ukusetshenziswa ukuqinisa ukuhlakazwa ngaphandle kokuthinta imali ekhokhwayo.
I-Anionic Surfactants:Siza ukuvikela ukuhlanganiswa kwezinhlayiya zezinhlayiya zezinhlayiya zezinhlayiya zezinhlayiya zezinhlayiya zezinhlayiya zezinhlayiya ze-latex.
Ama-CATALIC SURFCACTAnts:Kwesinye isikhathi esetshenziselwa izinhlelo zokusebenza ezithile lapho kudingeka khona icala elihle ukuze kubunguswe kangcono.
Indima:Ama-surfactants asiza ekuqinisekiseni ukuthi i-powder ingavuselelwa kalula ekusakazeni okubushelelezi, okuzinzile ngaphandle kokuqubuka noma ukugoqa.
3. Amathegi
Ama-Stagilizer angezwa kuma-polymer powders aqambukelayo ukuvikela izinhlayiya ze-latex kusuka ku-agglomerating (clumpling ndawonye). Baqinisekisa ukuthi lapho i-powder ixutshwe namanzi, ukusakazeka okuholela kufana futhi kuzinzile.
I-Polyethylene Glycol (PEG):I-Stabilizer Ejwayelekile Esiza Ukugcina Ukungaguquguquki Kokuhlakazwa.
I-Cellulose Derivatives:Kwesinye isikhathi bekusetshenziselwa ukuthuthukisa ukuqina nokubonakala kokuhlakazeka.
Ama-Starches aguqulwe nge-Hydrophobically:Lokhu kungenza njengezitebhisi ekwakhiweni okuthile ukuvikela okuhlanganisiwe kwezinhlayiya.
Indima:Abazimele babalulekile ukuze balondoloze ikhwalithi yokuhlakazeka ye-latex evuselelayo, ukuqinisekisa nokuguquguquka nokuqina okuhle kwezicelo.
4. Ama-filler
Ama-filler angezwe ama-powder we-latex ukunciphisa izindleko, athuthukise izakhiwo ezithile, noma aguqule ukuthungwa komkhiqizo wokugcina. Lokhu kufaka phakathi izinto ezinjenge-calcium carbonate, i-talc kanye ne-silica.
Calcium carbonate:Ivame ukusetshenziswa njenge-filler ukukhulisa inqwaba futhi ihlinzeke ngezixazululo ezingenzeka ngezindleko ezinamathelayo nezingubo.
I-TalC:Isetshenziselwa ukwenza ngcono ukugeleza nokulawula ukubonwa komkhiqizo.
SILICA:Ingathuthukisa izakhiwo zemishini kanye nokumelana kweSktrakt komkhiqizo wokugcina.
Indima:Ama-filler avezwa kaningi ukuguqula izakhiwo zesimbozo sokuhlakazeka kwe-latex, ngcono ukucubungula, futhi alawule ukuthungwa kokugcina.
5. Ukulondolozwa
Ama-Proservatives afakiwe ekwakhekeni ukuvikela ukukhula kwe-microbial ngesikhathi sokugcina futhi agcine ukuqina komkhiqizo ngokuhamba kwesikhathi. Ukulondolozwa okujwayelekile kufaka i-methylisothiazolinone, benzisothiazolinone, kanye nama-armaldehyde-ajenti.
Methylisothiazolinone (mit):Ukulondolozwa okusetshenziswa kabanzi okuvimbela ukukhula kwe-microbial ku-powder.
IBenzisothiazolone (Bit):Ifana ne-MIT, ivimbela ukungcoliswa kwe-fungal kanye negciwane legciwane.
Indima:Ama-Proservatives aqinisekisa isikhathi eside nokuqina kwe-polymer powder evuselelayo ngesikhathi sokugcina, ukusivimba ekulimaleni noma ekungcolisweni.
6. Ama-ejenti ahlanganisiwe
Ama-ejenti wama-coalescing angamakhemikhali asiza izinhlayiya ze-latex ukuba zihlangane ndawonye ngempumelelo lapho kusetshenziswa ukuhanjiswa ku-substrate. Bathuthukisa ukwakheka kwefilimu, okwenza umkhiqizo wokugcina uhlala isikhathi eside futhi uzwele ukugqoka nokuklebhula.
2,2,4-Trimethyl-1,3-pentanediol:Coalescent ejwayelekile esetshenziselwa ukuthuthukisa ukwakheka kwefilimu kuma-emulsions.
I-Butyl Carbitol Acetate:Isetshenziswa kweminye imikhiqizo ye-latex yokugeleza okungcono kanye nokwakheka kwefilimu.
Indima:Ama-ejenti ahlanganisiwe athuthukisa ukusebenza kokuhlakazeka kwe-latex, aqinisekise ukuthi akha ifilimu ebushelelezi, eqinile ebusweni.
7. Amapulangwe
Amapulasitiki asetshenziselwa ukuthuthukisa ukuguquguquka nokusebenza kwe-polymer powder evuselelwayo uma isisetshenziswa futhi sivuseleleke kabusha. Behlisa izinga lokushisa le-glass (TG) le-polymer, okwenza umkhiqizo wokugcina uguquke kakhulu.
I-DI-2-ethylhexyl phthalate (dehp):Ipulasitiki ejwayelekile esetshenziswe emikhiqizweni ehlukahlukene ye-latex.
I-Tri-n-Buttyl Citure (TBC):Imvamisa isetshenziswa njenge-spitifizizer engeyona inobuthi kwizicelo zokwakha.
Indima:Amapulasitiki athuthukisa ukuguquguquka kokuhlakazeka okuvuselelayo kwe-latex, ethuthukisa amandla awo okumelana nokuqhekeka nokukhubazeka ngokuhamba kwesikhathi.
8.Abaguquli be-PH
Ama-ph activater angezwa ekwakhekeni ukuze aqinisekise ukuthi i-latex igcina i-ph ezinzile, okubalulekile ekuzinzileni kokusabalalisa kanye nokusebenza kwezinye izithako.
I-Ammonium Hydroxide: Kuvame ukusetshenziselwa ukulungisa i-PH ekunikezelweni kwe-latex.
Sodium hydroxide: Kusetshenziselwa ukwandisa ph uma kunesidingo.
Indima:Ukugcina i-PH efanelekile kuqinisekisa ukuqina kokuhlakazeka kwe-latex, njengoba amazinga we-PH ajwayelekile angadala ukonakaliswa noma ukungazinzi ekwakhekeni.
Ithebula: Isifinyezo sezithako kuI-polymer polymer powder
| Umqobelo | Umsebenzi / Indima | Izibonelo |
| Ipholisa | Kwakha isisekelo sokuhlakazwa, ukuhlinzeka ngesibalo, ukuvumelana nezimo, nokuqina | I-PVA (i-polyvinyl acetate), i-SBR (Styrene-Buthadiene Rubber), EVA (Ethylene-Vinyl Acetate) |
| Ama-Surfactants | Ukusiza ekusakazeni i-powder emanzini, ukuvimbela ukuqina | I-nonionic, anionic, noma i-cationic surfic |
| Abaqinisi | Vimbela ukuhlangana kwe-latex yezinhlayiya, uqinisekisa ukuhlakazeka okufanayo | I-PEG (Polyethylene Glycol), Ama-Cellulose Derivatives, Starches Elungisiwe |
| Amapliki | Shintsha ukuthungwa, ukunciphisa izindleko, uthuthukise ukugeleza | I-calcium carbonate, talc, silica |
| Ukulondolozwa | Vimbela ukungcoliswa kwe-microbial kanye nokuwohloka | Methylisothiazolinone (mit), benzisothiazolinone (bit) |
| Ama-ejenti ahlanganisiwe | Thuthukisa ukwakheka kwefilimu nokuqina komkhiqizo wokugcina | I-Trimethyl Pentanediol, i-Butyl Carbittol Acetate |
| Amapulasitiki | Yenza ngcono ukuguquguquka nokusebenza kwe-latex yake yasebenza | I-Dehp (di-2-ethylhexyl phthalate), TBC (Tri-n-Buttyl citrate) |
| Abaguquli be-PH | Gcina i-PH efanelekile ukuze uqinisekise ukuqina kanye nokusebenza kahle | I-Ammonium Hydroxide, iSodium Hydroxide |
I-RDPIngabe imikhiqizo eguquguqukayo esetshenziswa kabanzi ekwakheni nasekugqokeni, ngenxa yokusebenza kwayo ekwakhekeni okulinganiselwe kwezithako ezahlukahlukene. Ingxenye ngayinye, kusuka ku-polymer kuya kubagcini nasekuqinisekiseni, idlala indima ebalulekile ekuqinisekiseni ukuthi i-powder isabalalisa kalula emanzini, yakha ukuhlakazeka okuzinzile nokusebenzayo kwe-latex. Ukuqonda izindima nemisebenzi yalezi zithako kubalulekile ekwakheni ukusebenza kwazo kuzinhlelo zokusebenza ezihlukile, kungaba ngama-adhesive, upende, noma ama-sealants.
Isikhathi sePosi: Feb-15-2025