Chii chinonzi redispersible latex powders?

Redispersible latex poda (RLP), inozivikanwawo seredispersible polymer poda (RPP), inoyerera-inoyerera, mvura-inopararira poda inowanikwa nekupfapfaidza-kuomesa polymer latex emulsion. Iyo ine polymer particles, kazhinji ine core-shell chimiro, pamwe neakasiyana ekuwedzera akadai sekudzivirira colloids, plasticizers, dispersants, uye anti-foaming agents. RLP yakagadzirirwa kuvandudza mashandiro uye zvivakwa zvesimende zvinhu, zvinosanganisira zvinonamira, dhaka, renders, uye machira, nekusimudzira kunamatira, kuchinjika, kuramba kwemvura, kushanda, uye kusimba.

Iyo nzira yekugadzira ye redispersible latex poda inosanganisira akati wandei matanho:

1. Polymer Emulsion Kugadzira: Iyo maitiro anotanga nekugadzirwa kwepolymer emulsion nekupolymerization yemamonomers akadai sevinyl acetate, ethylene, acrylic esters, kana styrene-butadiene pamberi pevano surfactants, emulsifiers, uye stabilizers. Iyo emulsion polymerization reaction inowanzoitwa mumvura pasi pemamiriro ekudzora kuburitsa yakagadzikana latex dispersions.
2. Kupfapfaidza Kuomesa: Iyo polymer emulsion inozoiswa pasi pekupfapfaidza kuomeswa, maitiro apo emulsion inoiswa atomu kuita madonhwe akanaka uye inounzwa mumhepo inopisa mukati mekamuri yekuomesa. Kukurumidza kubuda kwemvura kubva mumadonhwe kunotungamirira pakuumbwa kwezvikamu zvakasimba, izvo zvinounganidzwa sehupfu hwakaoma pasi pekamuri yekuomesa. Panguva yekuomeswa nekupfapfaidza, zvinowedzera senge ekudzivirira colloids uye plasticizers zvinogona kuiswa muzvikamu zvepolymer kuti zvivandudze kugadzikana uye kuita kwavo.
3. Particle Surface Kurapa: Mushure mekupfapfaidza kuomesa, iyo redispersible latex poda inogona kurapwa pamusoro pekugadzirisa zvimiro zvayo uye maitiro ekuita. Kurapa kwepamusoro kunogona kusanganisira kushandiswa kwemamwe machira kana kuiswa kwezvinowedzera zvinoshanda kuti zviwedzere kunamira, kusamira kwemvura, kana kuenderana nezvimwe zvinoumba simentitious formulations.
4. Packaging uye Kuchengeta: Iyo yekupedzisira inodispersible latex poda inoiswa mumabhegi anodzivirira hunyoro kana midziyo kuti idzivirire kubva kuhunyoro hwemamiriro ekunze uye kusvibiswa. Kurongedza kwakakodzera uye kuchengetedza mamiriro akakosha kuchengetedza kunaka uye kugadzikana kwehupfu nekufamba kwenguva.

Redispersible latex poda inowanzo chena kana isina-chena muruvara uye ine yakanaka particle saizi kugovera, kubva kune mashoma mamicrometer kusvika makumi emamicrometer. Inopararira nyore nyore mumvura kuti igadzire emulsions yakagadzikana kana dispersions, iyo inogona kuiswa nyore nyore mumagadzirirwo esimentiti panguva yekusanganiswa uye kushandiswa. RLP inoshandiswa zvakanyanya muindastiri yekuvaka sechinhu chinowedzera chinowedzera kuvandudza mashandiro, kushanda, uye kusimba kwezvinhu zvakasiyana siyana zvekuvaka uye kuisirwa.