Redispersible polymer poda yekugadzira maitiro

Nhanganyaya

Redispersible polymer powder (RDP) imhando yepolymer poda inogona kuparadzirwa mumvura kuti iite emulsion yakagadzikana. Inoshandiswa zvakanyanya muindastiri yekuvaka sechinhu chinowedzera kuvandudza mashandiro esimende-yakavakirwa zvinhu. RDP inogadzirwa nemaitiro anozivikanwa sekupfapfaidza-kuomesa, ayo anosanganisira iyo atomization yepolymer mhinduro kuita hupfu hwakatsetseka. Hupfu hunobva hwaomeswa hwogayiwa kusvika pakukura kwechidimbu chaidiwa.

Maitiro ekugadzira eRDP anosanganisira akati wandei matanho, anosanganisira kusarudzwa kwepolymer, kugadzirira mhinduro, atomization, kuomesa, uye kugaya. Hunhu hwechigadzirwa chekupedzisira hunoenderana zvakanyanya nemhando yezvakagadzirwa uye maitiro ekugadzirisa anoshandiswa panguva yekugadzira.

Polymer Sarudzo

Nhanho yekutanga mukugadzirwa kweRDP ndiko kusarudzwa kwepolymer yakakodzera. Kusarudzwa kwepolymer kunoenderana nezvinodiwa zvechigadzirwa chekupedzisira, sekuramba kwemvura, kunamatira, uye kuchinjika. Mapolima anonyanya kushandiswa pakugadzirwa kweRDP vinyl acetate-ethylene copolymers, acrylic copolymers, uye styrene-butadiene copolymer.

Kugadzirira Kugadzirisa

Kana iyo polymer yasarudzwa, inobva yanyungudutswa musolvent kugadzira mhinduro. Izvo zvinowanzo shandiswa zvinonyungudutsa zveRDP kugadzirwa imvura uye organic solvents senge ethanol uye isopropanol. Iko kusungirirwa kwepolymer mhinduro kunowanzo pakati pe10-20%.

Atomization

Nhanho inotevera mukugadzirwa kweRDP ndeye atomization. Atomization ndiyo nzira yekupwanya mhinduro yepolymer kuita madonhwe madiki. Izvi zvinowanzoitwa uchishandisa high-pressure nozzle kana rotary atomizer. Madonhwe acho anobva aomeswa mumhepo inopisa kuita hupfu.

Kuomesa

Poda yacho inoomeswa mumhepo inopisa kuti ibvise solvent. Kuomesa kunowanzoitwa patembiricha iri pakati pe80-120°C. Nguva yekuomesa inoenderana nerudzi rwepolymer inoshandiswa, kusungirirwa kwemhinduro, uye saizi inodiwa.

Kugaya

Nhanho yekupedzisira mukugadzirwa kweRDP iri kugaya. Kugaya inzira yekukuya hupfu kuita hukuru hwakatsetseka. Izvi zvinowanzoitwa pachishandiswa sando chigayo kana bhora. Saizi yechikamu chechigadzirwa chekupedzisira kazhinji iri pakati pe5-50 microns.

Mhedziso

Redispersible polymer poda imhando yepolymer poda inogona kuparadzirwa zvakare mumvura kuita emulsion yakagadzikana. Inoshandiswa zvakanyanya muindastiri yekuvaka sechinhu chinowedzera kuvandudza mashandiro esimende-yakavakirwa zvinhu. Iyo yekugadzira maitiro eRDP inosanganisira akati wandei matanho, anosanganisira kusarudzwa kwepolymer, kugadzirira mhinduro, atomization, kuomesa, uye kugaya. Hunhu hwechigadzirwa chekupedzisira hunoenderana zvakanyanya nemhando yezvakagadzirwa uye maitiro ekugadzirisa anoshandiswa panguva yekugadzira.