Ubuchule bokungasemva
I-powder yerabha ekwahlulwahlulwayo ngumgubo oqinileyo omhlophe ocutshungulwa ngokutshiza kunye nokomisa i-latex ekhethekileyo.Isetyenziswa ikakhulu njengesongezo esibalulekileyo "kwiwaka-mix mix mortar" kunye nezinye izongezo zodaka oluxubeneyo oluxubeneyo lwezixhobo zokwakha zobunjineli bodonga lwangaphandle..I-refractory latex powder esetyenziswa ngokuqhelekileyo i-copolymer ye-vinyl acetate, eyimpuphu emhlophe ekwazi ukuslayida ngokukhululekileyo kwaye inokusasazwa kakuhle emanzini ukuze yenze i-emulsion ezinzileyo kunye nokusebenza okufanayo njenge-latex yasekuqaleni.Njengento eyongeziweyo eyimfuneko kwiimveliso zodaka oluxutyiweyo, umgubo welatex ophinda uhlakazwe udlala indima ebalulekileyo kudaka oluxutywe nesamente eyomileyo.Inokuphucula amandla ebhondi kunye nokudibanisa kwezinto eziphathekayo.Ukuphucula amandla okugoba i-elastic kunye namandla okuguquguquka kwezinto.Ukuphucula ukuxhathisa ukunyibilika komkhenkce kwezinto.Ukuphucula ukuchasana kwemozulu, ukuqina, ukuxhatshazwa kwempahla.Ukuphucula i-hydrophobicity yezinto eziphathekayo kunye nokunciphisa ukufunxa kwamanzi.Ukuphucula ukusebenza kunye nokunciphisa ukuncipha kwezinto.Inokuthintela ngempumelelo ukuqhekeka.(I) Ukuphucula amandla okudibanisa kunye nokubambisana
Kwiimveliso zodaka lwesamente eyomileyo, kubaluleke kakhulu ukongeza umgubo werabha ophinda uhlakazwe.Kucacile kakhulu ukuphucula amandla okudibanisa kunye nokudibanisa kwezinto eziphathekayo.Oku kubangelwa ukungena kweengqungquthela zepolymer kwiipores kunye ne-capillaries ye-matrix ye-samente, kunye nesiphumo samandla okubambisana kakuhle emva kwe-hydration kunye ne-samente.Ngenxa yokuncamathela okugqwesileyo kwe-polymer resin ngokwayo, inokuphucula ukuncamathelwa kweemveliso zodaka lwesamente kwi-substrates, ngakumbi ukudityaniswa kwezibophelelo ze-inorganic ezifana nesamente kwiisubstrates ze-organic ezifana nomthi, ifayibha, i-PWC, kunye ne-PS.Ukuphuculwa komsebenzi ongemhle kunesiphumo esicacileyo.
Ukugoba okuphuculweyo kunye nokumelana nokuqina
Kwi-skeleton eqinile eyenziwe emva kokuba udaka lwesamente lufakwe emanzini, ifilimu ye-polymer i-elastic kwaye iqinile, kwaye yenza njengento edibeneyo ehambayo phakathi kwamasuntswana odaka lwesamente, anokumelana nemithwalo ephezulu yokuguqulwa kunye nokunciphisa uxinzelelo.Ukuphuculwa kokuqina kunye nokumelana nokugoba
Ukuphucula ukuxhathisa impembelelo
Redispersible latex powder is a thermoplastic resin.Ifilimu ethambileyo efakwe kumphezulu weengqungquthela zodaka inokuthatha impembelelo yamandla angaphandle kwaye iphumle ngaphandle kokuphuka, ngaloo ndlela iphucula ukuchasana kwempembelelo yodaka.
Ukuphucula i-hydrophobicity kunye nokunciphisa ukufunxa kwamanzi
Ukongeza i-latex powder enokuphinda ihlaziywe inokuphucula i-microstructure yodaka lwesamente.Ipolymer yayo yenza inethiwekhi engenakuguqulwa ngexesha lenkqubo ye-cement hydration, ivala i-capillary kwi-gel ye-samente, ivimbela ukuxutywa kwamanzi, ikhusela ukungena kwamanzi, kwaye iphucula ukungaphumeleli.
Ukuphucula ukumelana nokunxiba kunye nokuqina
Ukongeza i-redispersible 휘 ipowder yerabha inokunyusa ukubumbana phakathi kwamasuntswana odaka lwesamente kunye nefilimu yepolymer.Ukongezwa kwamandla okubambisana ngokuhambelanayo kuphucula amandla odaka ukumelana noxinzelelo lokucheba, kunciphisa isantya sokunxiba, kuphucula ukuxhathisa ukunxiba, kunye nokwandisa ubomi benkonzo yodaka.
Ukuphucula ukuzinza kwe-frize-nyibiliko kwaye uthintele ngokufanelekileyo ukuqhekeka kwezinto
I-latex powder ye-redispersible, impembelelo yeplastiki ye-resin yayo ye-thermoplastic inokuwoyisa umonakalo obangelwa ukwanda kwe-thermal kunye nokucutshungulwa kwezinto zodaka lwe-samente olubangelwa utshintsho lwamaqondo obushushu.Ukoyisa iintsilelo zodaka lwesamente olulula, olufana ne-shrinkage enkulu eyomileyo kunye nokuqhekeka okulula, kunokwenza izinto eziphathekayo ziguquguquke, ngaloo ndlela ziphucula ukuzinza kwexesha elide lezinto eziphathekayo.Nangona kunjalo, kukho iingxaki ezithile kwinkqubo yokuvelisa i-latex powder ehlaziywayo kwi-art yangaphambili, okubangelwa ukuba iincinci ze-latex azifani kwaye zilungile ngokwaneleyo, kwaye i-agglomeration iyakwazi ukwenzeka ngexesha lokuvelisa, ukuthutha kunye nokugcinwa.Ngaloo ndlela ichaphazela ukusebenza kwayo.
Le nkqubo inokuphunyezwa ngezisombululo zobuchwepheshe zilandelayo: inkqubo yokuvelisa i-redispersible back-dispersed latex powder, ezi zinto zilandelayo ziqulunqwe ngokwepesenti yobunzima obuqhotyoshelweyo be-polymer emulsion 72-85%;i-colloid yokukhusela i-4-9%;i-arhente yokukhulula i-11 -15%;izongezo ezisebenzayo 0-5%;uveliswa yinkqubo elandelayo
a, ukulungiswa kwe-colloid ekhuselayo: kwi-kettle yokuphendula, i-powder colloid ekhuselekileyo ye-batching ayixutywanga namanzi kwaye ishushu ukuze iguqulwe ibe yiglue, kwaye i-defoamer yongezwa, ishushu kwaye igcinwe ishushu ukwenza i-colloid ebonakalayo ebonakalayo , ukwenzela ukuba i-viscosity ifike kwi-2500as, iqinile Umxholo ufikelela kwi-19.5-20.5%.
b.Ukulungiswa kokusasazwa: beka i-colloid ekhuselekileyo yokukhusela kwi-kettle yokulungiselela, uze udibanise i-polymer emulsion ye-batching mali, udibanise ngokulinganayo, uze udibanise i-defoamer kwaye ungeze amanzi ukulungelelanisa i-viscosity kwi-70-200Mas, kwaye umxholo oqinileyo ufikelela kuma-39% - 42%, ukufudumala ukuya kwi-50-55 °
C, ukusetyenziswa;
C, ilifu lokutshiza ukomisa: vula inqaba yokutshiza yelifu, xa iqondo lobushushu lendawo yokutshiza ikwindawo ephezulu yelifu lokutshiza lokumisa inqaba lifudunyezwe ukuya kuthi ga kwi-140-150 DEG C, ukusasazwa okulungisiweyo kusiwa kwindawo yokungena kwi-feed inlet. umphezulu wesitshizi sokumisa inqaba ngepompo ejijwayo.Kwi-port feed, i-dispersion liquid i-atomized kwi-micro-droplets kunye ne-droplet diameter ye-10-100 microns ngokusebenzisa i-disc ye-atomization ye-centrifugal ephezulu kwi-port feed.Ngexesha elifanayo, i-micro-droplets ifudumala ngokukhawuleza nge-air-high-temperature airflow, kwaye ngexesha elifanayo, i-arhente yokukhululwa yongezwa kwi-airflow ephezulu., xa i-micro-droplets ishushu ukuze ivelise i-viscosity, i-arhente yokukhulula ibambelela kwi-micro-droplets ngexesha, kwaye emva koko amanzi kwi-micro-droplets ngokukhawuleza akhutshulwe ekomeni ngokuphuma komoya ophezulu wokushisa ukwenza i-gas- umxube oqinileyo;
d, ukupholisa kunye nokwahlula: gcina ubushushu bendawo yokuphuma komoya ye-spray drying tower kwi-79 ° C-81 ° C, kwaye umxube oqinileyo wegesi uthunyelwa ngaphandle ngokukhawuleza ukusuka kwindawo yokuphuma komoya ezantsi kwinqaba yokutshiza. , kwaye emva koko ingeniswe kwingxowa enkulu yokucoca emva kokupholisa.Umgubo wokuhamba komoya uyahlulwa kwaye umgubo ohluliweyo ucalulwe kwaye uhluzwe ukuze ufumane imveliso egqityiweyo yomgubo welatex ophinde wahlakazwa.I-Specific Embodiments Yongeza umlinganiselo othile wamanzi acocekileyo ngokomlinganiselo we-reactor ecocekileyo, nyusa ubushushu bube malunga ne-50°C, vula i-mechargeling, yongeza umgubo we-colloid okhuselayo ngokwe-25% yomthamo wamanzi ofakwe kwi-reactor, kwaye inkqubo yokudibanisa kufuneka icothe Yongeza ukuba ukuthintela umgubo ukusuka agglomerating emanzini.Musa ukuyongeza kudonga olusecaleni lwe-reactor.Emva kokuba ukongeza kugqityiwe, yongeza i-defoamer elingana ne-1% yemali iyonke.Kunconywa ukusebenzisa i-silicone-based defoamer.Gquma umngxuma wokuxheshisela uze ufudumeze ukuya kutsho kuma-95°C.Ifakwe kwi-1 iyure, i-liquid kwi-reactor kufuneka yenziwe ibe yi-glue ebonakalayo ebonakalayo, ngaphandle kwamaqhekeza amhlophe, isampuli, i-viscosity yokuvavanya kunye nomxholo oqinileyo, odinga i-viscosity ukufikelela malunga ne-2500as, kunye nomxholo oqinileyo ukufikelela kwi-19.5 ~ 20.5%.Yongeza i-colloid yokukhusela elungiselelwe kwi-kettle yokudibanisa, uze ungeze i-emulsion ye-polymer ngokulinganayo, xuba i-colloid ekhuselayo kunye ne-emulsion ngokulinganayo, kwaye ungeze i-defoamer ngokufanelekileyo, ngokuqhelekileyo ilingana ne-0.1% yesixa esipheleleyo, kwaye i-defoamer kufuneka isetyenziswe ngu. ngokwakho Emulsified abicah isibulali ntsholongwane
I-agent ye-foaming, kwaye yongeza amanzi ukulungelelanisa i-viscosity kwi-70-200pas, kunye nomxholo oqinileyo kwi-39% -42%.Nyusa ubushushu ukuya kuma-5055C.Uvavanyo lwesampulu, ilungele ukusetyenziswa.
Amanzi kumathontsi aya komiswa ngokukhawuleza ngobushushu obuphezulu bomoya, kwaye ke umxube oqinileyo werhasi uya kukhutshwa ngokukhawuleza uphume kwinqaba yokomisa, ugcine ubushushu bendawo yokuphuma komoya kwindawo esezantsi yokuphuma kwezixhobo zokomisa. I-79 ° C -81 ° Co. Umxube we-gas-solid ukhokelwa kwisixhobo sokumisa Emva kokushiya, yongeza i-dehumidified 5 ° C umoya owomileyo ukuze uphole phantsi, kwaye i-airflow equkethe umgubo ifakwe kwi-bag filter enkulu, kunye nomgubo ngaphakathi. ukuhamba komoya kwahlulwe ngeendlela ezimbini zokwahlula isitshingitshane kunye nokwahlulwa kohlulo., Umgubo ohluliweyo uhlelwa kwaye uhluzwe ukuze ufumane iziqithi ze-latex ezinokwakheka kwakhona.
Ukuthutha i-1,000 kg ye-dispersion liquid kunye nomxholo oqinileyo we-42% ukuya kwinqaba yokomisa kuxinzelelo oluthile, kwaye udibanise i-51 kg ye-arhente yokukhulula ngokwendlela engentla ngexesha elifanayo, yome ngokutshiza kwaye yahlule eqinile kunye negesi, kwaye ufumane. umgubo ophuma kwi-461 kg ngokucoleka okufanelekileyo.
Ixesha lokuposa: Feb-27-2023