Ungenza kanjani i-latex towx evuselelayo?

I-Redisperible Powmer Powder (RDP) iyinto ebalulekile esetshenziswa ekwakhiweni, embonweni, ezinamathelana nakwezinye izinkambu. Yakhiwa ngokufafaza i-emulsion futhi inokuhlakazeka okuhle nokunamathelisa.

1. Ukulungiswa okubonakalayo okuluhlaza
Izinto zokusetshenziswa eziphambili zokwenza i-latex evuselelayo ye-latex ifaka:
I-Polymer Emulsion: Njengo-Polyvinyl Alcohol (PVA), i-Ethylene-Vinyl Acetate (EVA), Styrene-acrylate (SA), njll.
I-colloid evikelayo: enjenge-polyvinyl alcohol, i-methyl cellulose, i-hydroxypropyl methyl cellulose, njll.
I-DeCoamer: Isetshenziselwa ukuqeda i-Foam kwinqubo yokukhiqiza, efana namafutha e-silicone kanye ne-polyse deforser.
I-Stabilizer: NjengeSodium Dodecylbenzene Sulfonate (SDBS), i-sodium polycacite, njll.

2. Ukulungiselela i-Emulsion
Khetha ama-monomers afanele ngokusho kwefomula yokusabela kwe-polymerization ukulungiselela i-polymer emulsion enezakhiwo ezidingekayo. Ngesikhathi sokulungiswa kwe-emulsion, lezi zinyathelo ezibalulekile ezilandelayo kufanele ziphawulwe:
Ukukhetha i-Monomer kanye nesilinganiso: Khetha ama-monomers afanele, anjenge-ethylene, i-vinyl acetate, njll., Ngokusho kwenhloso yomkhiqizo wokugcina, bese unquma isilinganiso sawo ukuze aqinisekise ukusebenza kwe-emulsion.
I-Emulsion Polymerization: Imvamisa i-radical polymerization isetshenziselwa ukwenza ama-polymerize ama-monomer abe yi-polymer emulsion. Ukusabela kwe-polymerization kudinga ukwenziwa ngaphansi kwezimo ezilawulwa ngokuqinile, kufaka phakathi izinga lokushisa, isivinini sokuvuselela, isilinganiso sokungezwa kwe-Initiator, njll.
Ukungezwa kwe-colloid evikelayo ne-stabilizer: engeza inani elifanele le-colloid evikelayo ne-stabilizer ku-emulsion ukuvikela i-emulsion kusuka kunqubo elandelayo yomisha.

3. Ukuhlekisa kwe-emulsion
Ngaphambi kokuchomisa okufafaza, i-emulsion idinga ukwenziwa sengathi, kufaka phakathi izinyathelo ezilandelayo:
I-FILTRATION: Susa ukungcola ku-emulsion ngesihlungi noma i-centrifuge ukuqinisekisa ubumsulwa be-emulsion.
Ukugxila: Gxila kakhulu i-Emulsion kokuqukethwe okuqinile okuqinile ngokuhwamuka noma ukugcwaliswa kwe-membrane ukuthuthukisa ukusebenza kahle.

4. Ukufafaza
I-Spray Corying inqubo eyinhloko yokwenza i-latex towx evuselelayo. Izinyathelo ezithile zinjengokulandelayo:
Ukukhetha i-Spray Corying tower: Khetha imishini yokumisa yokufafaza efanelekile ngokuya ngezakhiwo nokukhishwa kwe-emulsion. Imishini esetshenziswa kaningi ifaka i-centrifugal Spray Spray tower nengcindezi yokufafaza umbhoshongo.
Ukusethwa kwamapharamitha omiswa: Setha izinga lokushisa lomoya elifanele, okushisa komoya nokushisa kwengcindezi. Ngokuvamile, izinga lokushisa lomoya le-Inlet lilawulwa ku-150-200 ℃, kanti izinga lokushisa lomoya lokuphuma lilawulwa ku-60-80 ℃.
Inqubo yokumisa yokufafaza: I-emulsion ehleliwe ihlelwe ngamaconsi amahle ngokusebenzisa isifutho, futhi ngokushesha ukuxhumana nomoya oshisayo embhoshongo omisiwe, futhi amanzi ahanjiswa ukuze akha izinhlayiya ezinhle zokomisa.
Iqoqo le-Powder: I-latex yomisiwe ye-latex eqoqwe yi-cyclone upterter noma isihlungi sesikhwama. I-latex eqoqiwe ye-latex eqoqwe idinga ukuphola futhi izinhlayiya ezinkulu zisuswa ngokuhlonza ukuze kuqinisekiswe ukufana komkhiqizo.

I-5. I-post-processing andpakipha
I-latex yomi omisiwe ye-latex elungisiwe idinga ukucutshungulwa kahle ukuze kuqinisekiswe ukusebenza kwayo okuzinzile kanye nesitoreji esiphephile. Ukusebenza ngemuva kubandakanya ikakhulukazi:
Ukwelashwa okulwa nokwelashwa: Faka ama-anti-casiking agents (njenge-talcum powder, i-silicon dioxide) ebusweni be-latex powder ukuvikela i-powder ku-agglomerating ngesikhathi sokugcina nokuhamba.
Ukupakishwa: Ngokwezidingo zamakhasimende, i-latex powder ifakwe kwizikhwama zomswakama kanye nezikhwama zothuli noma imiphongolo. Umswakama udinga ukulawulwa ngokuqinile ngesikhathi senqubo yokupakisha ukuvikela i-powder ekutholeni umswakama.

6. Ukulawulwa kwekhwalithi
Ngesikhathi senqubo yokukhiqiza, kudingeka ukulawulwa kwekhwalithi okuqinile ukuqinisekisa ukuthi izinkomba zokusebenza kwempuphu ye-latex evuselelayo zihlangabezane nezidingo. Izinto ezijwayelekile zokulawula ikhwalithi zifaka:
Ukusatshalaliswa kosayizi wezinhlayiyana
Amandla okunamathela: Hlola amandla okunamathela we-latex powder kuma-substrates ahlukene ukuze uqinisekise ukusebenza kwawo kokunamathela.
Ukuhlenga kabusha: Hlanganisa i-latex powder ngamanzi ukuze ubone ukuthi ingasatshalaliswa ngokulinganayo futhi ibuyiselwe esimweni se-emulsion.

7. Isicelo kanye nokuqapha
I-FATTEX evuselelayo ye-latex isetshenziswa kabanzi ekwakheni udaka, izinamathiseli, amasimu wokufaka odongeni wangaphandle kanye nezinye izinkambu. Amaphuzu alandelayo adinga ukubonwa lapho usebenzisa:

Izimo Zokugcina: I-Latex Powder kufanele igcinwe endaweni eyomile nelipholile ukugwema izinga lokushisa eliphakeme kanye nomswakama.
Isilinganiso sokusetshenziswa: ngokuya ngezidingo ezithile zohlelo lokusebenza, engeza i-latex powder ngokufanele ukuze uthole ukusebenza okuhle kakhulu.
Ngezinye izithasiselo: I-Redisitible Teatex Powder ivame ukusetshenziswa nezinye izengezo (njenge-cellulose ether, defouamer) ukuthuthukisa ukusebenza kwezinto.

I-tablex evuselelayo ye-latex enokusebenza okuhle ingakhiqizwa ngempumelelo. Ekukhiqizweni kwangempela, kuyadingeka ukujwayela ngokuya ngemibandela ethile yokukhiqiza kanye nezidingo zomkhiqizo ukuqinisekisa ikhwalithi ezinzile nethembekile yomkhiqizo wokugcina.