Background technique
Redividable rabha poda ipfu chena yakasimba yakagadziriswa nekupfapfaidza nekuomesa yakakosha latex.Inonyanya kushandiswa sechinhu chakakosha chekuwedzera che "chiuru-musanganiswa dhaka" uye mamwe akaoma-musanganiswa edhaka ekuwedzera kune ekunze madziro ekudzivirira engineering engineering yekuvaka..Iyo inowanzoshandiswa refractory latex powder is a copolymer yevinyl acetate, iyo ipfu chena inogona kutsvedza zvakasununguka uye inogona kunyatsoparadzirwa mumvura kuti iite emulsion yakagadzikana nekushanda kwakafanana neyokutanga latex.Sechinhu chakakosha chekuwedzera mune dzakaoma-musanganiswa zvigadzirwa zvedhaka, redispersible latex poda inoita basa rakakosha musimende yakaoma-yakasanganiswa dhaka.Inogona kuvandudza kusimba kwechisungo nekubatana kwezvinhu.Kuvandudza iyo elastic bending simba uye flexural simba rezvinhu.Kuvandudza kutonhora-kunyunguduka kwekupikisa kwezvinhu.Kuvandudza kupikisa kwemamiriro ekunze, kusimba, kupfeka kusagadzikana kwezvinhu.Kuvandudza hydrophobicity yezvinhu uye kuderedza kunyura kwemvura.Kuvandudza kushanda uye kuderedza shrinkage yezvinhu.Inogona kunyatso kudzivirira kutsemuka.(I) Kuvandudza simba rekubatanidza uye kubatana
Mune yakaoma simende zvigadzirwa zvedhaka, zvinonyanya kukosha kuwedzera redispersible rubber poda.Zvinonyatsojeka kuvandudza simba rekubatanidza uye kubatana kwezvinhu.Izvi zvinokonzerwa nekupinda kwemapolymer particles mu pores uye capillaries ye simenti matrix, uye mugumisiro wesimba rakanaka rakabatana mushure me hydration ne simenti.Nekuda kwekunamira kwakanakisa kwepolymer resin pachayo, inogona kuvandudza kunamatira kwezvigadzirwa zvesimende kune substrates, kunyanya kusungirirwa kwemainorganic binders sesimende kune organic substrates sehuni, fiber, PWC, uye PS.Kuvandudzwa kwekuita kwakashata kune zvakanyanya kuoneka.
Kuvandudzwa kwekukotama uye kusagadzikana kwekudzivirira
Mune skeleton yakaoma yakaumbwa mushure mekunge simende yaiswa mvura, iyo firimu yepolymer yakanyungudika uye yakaoma, uye inoita senge mubatanidzwa unofambiswa pakati pemasimende edhaka zvimedu, izvo zvinokwanisa kumira zvakanyanya deformation mitoro uye kuderedza kushushikana.Kuvandudza tensile uye kukotama kuramba
Kuvandudza kukanganisa kwekudzivirira
Redispersible latex powder is thermoplastic resin.Iyo firimu yakapfava yakavharwa pamusoro pevhu zvidimbu zvinogona kutora kukanganiswa kwesimba rekunze uye kuzorora pasina kutyora, nekudaro ichivandudza kupikisa kwedhaka.
Kuvandudza hydrophobicity uye kuderedza kunyura kwemvura
Kuwedzera redispersible latex poda inogona kuvandudza iyo microstructure yesamende dhaka.Iyo polymer yayo inoumba network isingadzokerike panguva ye simenti hydration process, inovhara iyo capillary mune simende gel, inovhara kunyura kwemvura, inodzivirira kupinda kwemvura, uye inovandudza kusamira.
Kuvandudza kupfeka kusagadzikana uye kusimba
Kuwedzera redispersible 휘 rubber poda inogona kuwedzera compactness pakati pesimende dhaka zvimedu uye polymer firimu.Kukwidziridzwa kwesimba rakabatana kunonatsiridza kugona kwedhaka kuti rimire kushushikana kweshear, kunoderedza chiyero chekupfeka, kunonatsiridza kuramba kwekupfeka, uye kurebesa hupenyu hwebasa redhaka.
Kuvandudza kugadzikana kwechando-thaw uye kudzivirira zvinobudirira kuparuka kwezvinhu
Redispersible latex poda, iyo yepurasitiki mhedzisiro ye thermoplastic resin yayo inogona kukunda kukuvadzwa kunokonzerwa nekuwedzera kwekupisa uye kudhonzwa kwesamende yedhaka zvinhu zvinokonzerwa nekushanduka kwekusiyana kwekushisa.Kukunda kukanganisa kwedhaka resimende rakareruka, senge shrinkage yakakura yakaoma uye kuputika kuri nyore, kunogona kuita kuti zvinhu zviwedzere kushanduka, nokudaro zvichivandudza kugadzikana kwenguva refu kwezvinhu.Nekudaro, kune mamwe matambudziko mukugadzirwa kweiyo redispersible latex poda mune yekutanga art, zvichikonzera kuti latex particles haina yunifomu uye yakanaka zvakakwana, uye agglomeration inowanzoitika panguva yekugadzira, kutakura uye kuchengetedza.Izvi zvinokanganisa kushandiswa kwayo.
Iyi nzira inogona kuitika kuburikidza neanotevera ehunyanzvi mhinduro: chirongwa chekugadzira che redispersible back-dispersed latex powder, zvinotevera zvinhu zvinoumbwa zvinoenderana neakabatanidzwa uremu muzana polymer emulsion 72-85%;kudzivirira colloid 4-9%;kuburitsa mumiriri 11 -15%;zvinoshanda zvinowedzera 0-5%;inogadzirwa nenzira inotevera
a, kugadzirira kwekudzivirira colloid: mukuita kettle, iyo inodzivirira colloid poda yehuwandu hwebatching haina kusanganiswa nemvura uye inopisa kuti igadziriswe kuita glue, uye defoamer inowedzerwa, inopisa uye inochengetwa ichidziya kuti iite yakajeka viscous inodzivirira colloid. , kuitira kuti viscosity isvike 2500as, yakasimba Zvinyorwa zvinosvika 19.5-20.5%.
b.Kugadzirira kwekupararira: isa iyo yakagadzirira inodzivirira colloid mupoto yekugadzirira, wobva wawedzera emulsion yepolymer yehuwandu hwebatching, sanganisa zvakaenzana, wobva wawedzera defoamer uye wedzera mvura kugadzirisa viscosity kusvika 70-200Mas, uye yakasimba yemukati inosvika 39% - 42%, ichidziya kusvika 50-55 °
C, kushandiswa;
C, gore rekupfapfaidza kuomesa: vhura gore rekupfapfaidza shongwe yekuomesa, kana tembiricha yefeed inlet iri pamusoro peiyo yekupfapfaidza gore yekuomesa shongwe inodziya kusvika 140-150 DEG C, kuparadzirwa kwakagadzirirwa kunounzwa kune yekudyira yekudya. pamusoro pespray drying tower ine screw pump.Muchiteshi chekudya, mvura yekuparadzira inoiswa atomi kuita madiki-madonhwe ane donhwe dhayamita ye10-100 microns kuburikidza neakakwira-speed centrifugal atomization disc muchiteshi chekudya.Panguva imwecheteyo, ma-micro-droplets anokurumidza kupisa ne-high-temperature airflow, uye panguva imwechete, mumiririri wekusunungura anowedzerwa mumhepo yakakwirira-yepamusoro., apo ma-micro-droplets anopisa kuti abudise viscosity, iyo inosunungura inonamatira kune micro-droplets munguva, uye ipapo mvura iri mudiki-madonhwe inokurumidza kubuda kuti iome nepamusoro-tembiricha yemhepo kuti iite gasi- musanganiswa wakasimba;
d, kutonhora uye kupatsanurwa: chengetedza tembiricha yemhepo yekubuda kwespray drying tower air outlet pa79 ° C-81 ° C, uye musanganiswa wakasimba gasi unokurumidza kutumirwa kunze kubva mumhepo inobuda pazasi pespray drying tower. , yobva yapinzwa musefa yebhegi hombe mushure mekutonhodzwa.Iyo hupfu mumhepo inoyerera inopatsanurwa uye iyo yakapatsanurwa hupfu inoiswa mumapoka uye inosefa kuti iwane chakapedzwa chigadzirwa cheyakaparadzirwazve latex poda.Specific Embodiments Wedzera imwe huwandu hwemvura yakachena zvichienderana nereactor yakachena, simudza tembiricha kusvika pa50 ° C, batidza iyo inomutsa nzira, wedzera inodzivirira colloid powder zvinoenderana ne25% yehuwandu hwemvura yakawedzerwa kune reactor, uye nzira yekuwedzera inofanira kunonoka Wedzera iyo kudzivirira hupfu kubva kune agglomerating mumvura.Usaiwedzera kumadziro edivi reiyo reactor.Mushure mekunge kuwedzera kwapera, wedzera defoamer yakaenzana ne1% yemari yose.Inokurudzirwa kushandisa silicone-based defoamer.Vhara gomba rekudyisa uye kupisa kusvika pa 95°C.Insulated kweawa imwe, iyo mvura iri mureactor ichaumbwa kuita yakajeka viscous glue, isina chena zvimedu, sampling, yekuyedza viscosity uye yakasimba yemukati, inoda viscosity kusvika 2500as, uye yakasimba yemukati kusvika 19.5 ~ 20.5%.Wedzera iyo yakagadzirwa inodzivirira colloid kune kettle yekusanganisa, wobva wawedzera emulsion yepolymer muchiyero, sanganisa iyo inodzivirira colloid uye emulsion zvakaenzana, uye wedzera defoamer zvakakodzera, kazhinji yakaenzana neinenge 0.1% yehuwandu hwese, uye defoamer inofanira kushandiswa ne iwe pachako Emulsified silicone disinfectant
Foaming agent, uye wedzera mvura kugadzirisa viscosity kusvika 70-200pas, uye yakasimba yemukati kusvika 39% -42%.Simudza tembiricha kusvika 5055C.Sampling bvunzo, yakagadzirira kushandisa.
Mvura iri mumadonhwe ichakurumidza kuomeswa nepamusoro-tembiricha yemhepo, uye ipapo gasi-yakasimba musanganiswa ichakurumidza kuendeswa kunze kwekuomeswa kweshongwe, kuchengetedza kutonhora kwemhepo inobuda pamhepo yakadzika yemhepo yekuomesa michina pa. 79 ° C -81 ° Co. Iyo gasi-yakasimba musanganiswa inotungamirirwa kubva mumidziyo yekuomesa Mushure mekubva, wedzera dehumidified 5 ° C mhepo yakaoma kuti itonhorere pasi, uye mhepo ine hupfu inounzwa muhombe yebhegi sefa, uye poda mukati. kuyerera kwemhepo kunopatsanurwa nenzira mbiri dzekuparadzanisa dutu uye kupatsanurwa kwesefa., Iyo yakaparadzaniswa yehupfu inoiswa mumapoka uye inosefa kuti iwane redispersible latex poda zvitsuwa.
Kutakura 1,000 kg yemvura yekuparadzira ine yakasimba yemukati ye42% kune yekuomesa shongwe pane imwe dzvinyiriro, uye wedzera 51 kg yekuburitsa mumiriri zvinoenderana neiyo nzira iri pamusoro panguva imwe chete, yakaoma nekupfapfaidza uye kupatsanura yakasimba uye gasi, uye uwane. hupfu hunobuda 461 kg nekunaka kwakakodzera .
Nguva yekutumira: Feb-27-2023