Redispersible latex poda yakasarudzika yemvura-based emulsion uye polymer binder yakagadzirwa nekupfapfaidza kuomesa nevinyl acetate-ethylene copolymer sechinhu chikuru mbishi. Mushure mekunge chikamu chemvura chanyungudika, zvikamu zvepolymer zvinoumba firimu repolymer neagglomeration, rinoshanda sebhainda. Kana iyo redispersible latex poda inoshandiswa pamwe chete neinorganic gelling zvicherwa senge simende, inogona kugadzirisa dhaka. Iwo makuru mabasa e redispersible latex powder ndeaya anotevera.
(1) Kuvandudza bond simba, tensile simba uye kukotama simba.
Redispersible latex poda inogona kuvandudza zvakanyanya kusimba kwechisungo chedhaka. Iyo yakakura iyo mari yakawedzerwa, iyo yakakura kusimudza. Kusimba kwechisungo chakakwirira kunogona kudzivisa shrinkage kune imwe nhanho, uye panguva imwe chete, kushungurudzika kunokonzerwa nekugadzirisa zviri nyore kuparadzira uye kusunungurwa, saka kusungirirwa kwesimba kwakakosha zvikuru pakuvandudza kupesana kwekuputika. Zvidzidzo zvakaratidza kuti synergistic mhedzisiro ye cellulose ether uye polymer poda inobatsira kuvandudza kusimba kwechisungo chesamende dhaka.
(2) Deredza elastic modulus yedhaka, kuitira kuti brittle simende dhaka ine imwe nhanho yekushanduka.
Iyo elastic modulus ye redispersible latex powder yakaderera, 0.001-10GPa; nepo elastic modulus yesamende dhaka yakakwirira, 10-30GPa, saka elastic modulus yesamende dhaka inoderera nekuwedzera kwepolymer poda. Nekudaro, iyo mhando uye huwandu hwepolymer hupfu zvakare hune mhedzisiro pane modulus ye elasticity. Kazhinji, sezvo reshiyo yepolymer kune simende inowedzera, modulus ye elasticity inodzikira uye deformability inowedzera.
(3) Kuvandudza kudzivirira kwemvura, alkali resistance, abrasion resistance uye kukanganiswa kwemaitiro.
Iyo network membrane chimiro chakaumbwa nepolymer inovhara maburi uye kuputika mumatope esimende, inoderedza porosity yemuviri wakaoma, uye nekudaro inovandudza kusamira, kudzivirira kwemvura uye kupikisa kwechando kwesamende dhaka. Iyi mhedzisiro inowedzera nekuwedzera polymer-simende ratio. Iko kunatsiridza kwekupfeka kuramba kune hukama nerudzi rwepolymer poda uye chiyero chepolymer kune simende. Kazhinji, kupfeka kuramba kunovandudza sezvo reshiyo yepolymer kune simende inowedzera.
(4) Kuvandudza kuyerera uye kushanda kwedhaka.
(5) Kuvandudza kuchengetwa kwemvura kwedhaka uye kuderedza kubuda kwemvura.
Iyo polymer emulsion inoumbwa nekunyungudutsa iyo redispersible polymer hupfu mumvura inoparadzirwa mudhaka, uye inoenderera organic firimu inoumbwa mudhaka mushure mekuoma. Iyi firimu yehupenyu inogona kudzivirira kutama kwemvura, nokudaro kuderedza kurasikirwa kwemvura mumatope uye kutamba basa mukuchengetedza mvura.
(6) Deredza kuputika chiitiko
Kurebesa uye kuoma kwepolymer yakagadziridzwa simende dhaka zviri nani pane yakajairwa simende dhaka. Iko flexural performance inopfuura ka2 nguva yeyakajairika simende dhaka; iko kuomarara kunowedzera nekuwedzera kweiyo polymer simende ratio. Nekuwedzera kwehuwandu hwepolymer poda yakawedzerwa, flexible cushioning effect yepolymer inogona kudzivisa kana kunonoka kukura kwekutsemuka, uye panguva imwe chete iyo ine yakanaka yekushungurudzika kuparadzira maitiro.
Nguva yekutumira: Jun-20-2023