Iimpawu ezibonakalayo ze-latex powder eziphinda zihlakazwe

Redispersible polymer powder (RDP) ngumgubo wepolymer osebenza kakhulu osetyenziswa ngokubanzi kulwakhiwo, iingubo kunye namanye amashishini. Yenziwe ngokusabalalisa i-emulsion ye-polymer emanzini, emva koko yomisa ukwenza umgubo. I-powder iyakwazi ukuchithwa ngokulula emanzini ukwenza i-emulsion ezinzileyo, eyenza i-polymer eguquguqukayo.

Iimpawu ezibonakalayo zeRDP zidlala indima ebalulekileyo ekusebenzeni kwayo kunye nokufaneleka kwezicelo ezahlukeneyo. Kweli nqaku, siza kuxoxa ngezinto ezahlukeneyo ze-RDP kwaye kutheni zibalulekile.

Ubungakanani beNcam kunye noSabelo

Ubungakanani bamasuntswana kunye nokuhanjiswa kwe-RDP kumisela ukuguquguquka kwayo kunye nokulula kokuphatha. Incinci isayizi yesuntswana, ingcono i-fluidity. Iipowders ze-RDP zihlala kuluhlu lwe-5-200 ye-micron kwaye inomlinganiselo omncinci wokusabalalisa ubungakanani. Ukusabalalisa ubungakanani be-particle efanayo kuqinisekisa ukuba i-powder isasazeka ngokulula emanzini kwaye inika i-emulsion ezinzileyo.

Unizi lolwapho kuyiwa khona

Uxinaniso lobuninzi bubunzima be-RDP ngomthamo weyunithi nganye. Ubuninzi be-powder ye-RDP buchaphazela ukugcinwa kwayo kunye nokuthutha. Ukuxinana kwezambuku ezisezantsi kuthetha umthamo othe kratya wobunzima obufanayo kwaye kufuna indawo enkulu yokugcina. Kwelinye icala, ukuxinana kwesambuku esiphezulu kuthetha ubuninzi obungaphantsi kobunzima obufanayo kwaye kufuna indawo yokugcina encinci.

Ubuninzi bobuninzi be-RDP buyohluka ngokohlobo, ibakala kunye nolwakhiwo. Uluhlu lwayo luyi-200-700 kg / m3. Ngokubanzi, ukuxinana kwesambuku esisezantsi kuyafunwa ukuze kube lula ukuphatha kunye nokuthutha.

umxholo wamanzi

Isiqulatho samanzi luphawu olubalulekileyo lwe-RDP njengoko luchaphazela uzinzo lwalo lokugcinwa, ukusasazeka kunye neempawu zokwenza ifilimu. Isiqulatho samanzi sinokwahluka ngokuxhomekeke kwinkqubo yokwenziwa, iimeko zokugcinwa kunye nokwakhiwa. Ngokuqhelekileyo, umxholo wamanzi kwi-RDP uvela kwi-1-3%, ukugcina umxholo wamanzi uphantsi ukuphucula ukuzinza kokugcinwa kwepowder.

Iimpawu zokwenza ifilimu

I-RDP isetyenziswa ngokuqhelekileyo njengento yokuncamathelisa okanye i-adhesive kulwakhiwo kunye nezicelo zokugquma. Iimpawu zayo zokwenza ifilimu, ezifana nokubambelela, ukudibanisa, kunye nokuguquguquka, kubaluleke kakhulu ekunqumeni ukufaneleka kwayo kwizicelo ezahlukeneyo.

Iimpawu zokwenza ifilimu ye-RDP zixhomekeke kuhlobo lwepolymer esetyenzisiweyo, uhlobo lwe-emulsifier kunye ne-polymer concentration. Ii-RDPs zenzelwe ukubonelela ngeempawu ezithile zokwenza ifilimu ukuhlangabezana neemfuno zezicelo ezahlukeneyo.

ukuphinda-dispersibility

I-Redispersibility ibhekisela kwisakhono se-RDP ukwenza i-emulsion ezinzileyo xa ifakwe emanzini emva kokumisa. Olu phawu lubaluleke kakhulu kwizicelo ezininzi njengoko luvumela ukuphathwa ngokulula kunye nokuxuba.

I-redispersibility ye-RDP ixhomekeke kuhlobo kunye nomgangatho we-emulsifier esetyenziswe kwinkqubo yokuvelisa kunye neemeko zokugcina ze powder. Iipowders ze-RDP zinokuba neempawu ezahlukeneyo zokuphinda zisasazwe ukusuka kwimizuzu ukuya kwimizuzu.

i-viscosity

I-Viscosity ngumlinganiselo wezinto eziphathekayo zokuchasa ukuhamba. I-viscosity ye-emulsion ye-RDP ichaphazela iimpawu zayo zesicelo ezifana nokusasazeka, ukulinganisa kunye nokumanzisa. Iiviscosities eziphezulu zibonelela ngokwenziwa kwefilimu engcono kunye nokuzinza, kodwa zinokwenza izicelo zibe nzima ngakumbi.

I-viscosity ye-emulsions ye-RDP ixhomekeke kugxininiso lwepolymer, uhlobo lwe-emulsifier kunye nokuqulunqwa. Inokuqala ukusuka ezantsi ukuya phezulu, kuxhomekeke kwiimfuno zesicelo.

ukuququmbela

Ukuqukumbela, iimpawu ezibonakalayo zeRDP zidlala indima ebalulekileyo ekusebenzeni kwayo nasekusebenzeni kwayo. Ubungakanani besuntswana, ukuxinana kwesambuku, umxholo wamanzi, ukubunjwa kwefilimu, ukuphinda-phinda ukwahlukana kunye ne-viscosity zezona mpawu zisisiseko ze-RDP. Ngokuqonda ezi mpawu, abavelisi banokulungelelanisa i-RDP kwizicelo ezithile ukuhlangabezana neemfuno ezahlukeneyo zabathengi. I-RDP ithathwa njengenye yezona zinto ziguquguqukayo nezisebenzayo zepolymer powders, iyenza ilunge kumashishini amaninzi kubandakanya ulwakhiwo, iingubo kunye nezinto zokuncamathelisa.