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Indasitiri yepasi rose yekupenda machira iri kuona shanduko huru kuenda kumhando dzemvura, zvichikonzerwa nemitemo yakasimba yezvakatipoteredza uye kunetseka kuri kukura kwekuchengetedza. Pakati peshanduko iyi ndipo pane kutsvaga pigments dzinoshanda zvakanaka, uye kabhoni nhema yakabuda sechinhu chakakosha. Zvisinei, kugadzira machira akavakirwa mumvura ane ruvara rutema rwakadzama kunounza matambudziko akasiyana, uye apa ndipo panopinda dema rakadzikira rekabhoni dema sechinochinja mutambo.

Mapendi emvura ari kuwedzera kufarirwa nekuda kwekusaburitsa kwawo VOC (Volatile Organic Compound) kwakaderera, kusasvibisa nharaunda, uye nyore kuchenesa. Asi, kuisa black yakajairwa yekabhoni mumasystem aya kunowanzo tungamira mukuwedzera kwe viscosity yependi, zvichikonzera kusafamba zvakanaka kwemvura, kuumbwa kwefirimu isina kuenzana, uye mavanga emabhurashi asina kunaka. Black yakajairwa yekabhoni, giredhi rakasiyana rakagadzirwa kugadzirisa matambudziko aya, rinopa mhinduro inosanganisa dema rakadzika nekugona kugadzikiswa zvakanaka mumasystem emvura.

Chinhu chikuru chinobatsira che low viscosity carbon black mu water-based coatings kugona kwayo kuchengetedza low viscosity kunyangwe kana paine zvinhu zvakawanda. Standard carbon black, ine nzvimbo yayo yepamusoro uye mapoka e polar surface akadai se carboxyl ne hydroxyl, inosangana zvakanyanya nemamorekuru emvura. Kubatana uku kunoumba network inogona kuwedzera kaviri kana katatu viscosity ye coat pa low loading ye 2-3%. Kusiyana neizvi, low viscosity carbon black inogadziriswa pamusoro uchishandisa non-ionic surfactants senge ethoxylated alcohols. Kuchinja uku kunoderedza kusangana pakati pemvura ne carbon black, zvichideredza surface charge density ye carbon black, ne zeta potential inowanzo bva pa -20 kusvika -30 mV (inoyerwa kuburikidza ne electrophoretic light scattering). Nekuda kweizvozvo, network formation inodzivirirwa, zvichiita kuti coating iite zvakanaka uye inoenderana.

Muenzaniso chaiwo wemugadziri wezvokuputira muUnited States unoratidza kushanda kwe low viscosity carbon black. Pakaedzwa mu water-based acrylic architectural coating pa 2.5% loading, viscosity yezvokuputira yakaramba iri pa 350-400 cP (Brookfield, 60 rpm). Kana tichienzanisa, coating imwechete ne standard carbon black yaive ne viscosity ye 800-900 cP. Kudzikira uku kwakakosha mu viscosity kwakashandura kuita soft brush uye roller application, nefirimu yakaomeswa isingaratidzi mavanga ebhurashi anooneka kana magadzirirwo eganda reorenji.

Kuumbwa kwefirimu chimwe chinhu chakakosha apo dema recarbon risingaonekwe zvakanaka. Mapendi emvura anotsigira kubatana kwezvikamu zvepolymer panguva yekuomesa kuti agadzire firimu rinoenderera mberi, rakafanana. Kuwanda kwesimba kunogona kukanganisa maitiro aya, zvichikonzera zvikanganiso zvakaita semaburi, maburi, kana kusabatana zvakanaka. Kupararira kwakafanana kweganda recarbon black risingaonekwe zvakanaka, kwakasimbiswa kuburikidza ne centrifugal sedimentation, kunoita kuti zvikamu zvecarbon black zvisavharise kubatana kwezvikamu zvepolymer. Mafirimu akaomeswa ane dema recarbon iri rakasarudzika anoratidza nzvimbo yakatsetseka, ine kukosha kweroughness (Ra) kwe ≤0.5 μm (yakayerwa kuburikidza ne profilometry), uye kunamatira kwakasimba kune substrates. Semuenzaniso, pakongiri, simba rekunamira rinogona kusvika 6-8 MPa (ASTM D4541), zvichienzaniswa ne 4-5 MPa yemafirimu ane dema recarbon rakajairika. Mumapendi ehuni akavakirwa mumvura, kugadzirwa kwefirimu rakatsetseka hakungowedzere huni dzechisikigo asiwo kunopa kupera kwakasimba, kunodzivirira kukwenya. Mugadziri wemidziyo yemumba akataura mhedzisiro yakanaka achishandisa carbon black yakaderera mupurasitiki yemumvura, fenicha yakapedzwa ichiratidza kupenya, dema rakafanana rakaita serinopenya uye rakatsungirira kukwesha kanopfuura mazana mashanu (ASTM D2486) pasina kupera simba kana kusvuuka.

Hunhu hwemavara hwakakoshawo mukuputira, uye dema rekabhoni rakapfava rinopa kushanda kwakanaka munzvimbo iyi. Nesimba rayo guru rekupenya, rinowanzova 100-110% kana tichienzanisa nedema rekabhoni rakapfava (rakayerwa kuburikidza neASTM D2805), rinogona kuita dema rakadzika kana rakapfava. Kutakura kwe2-2.5% kwakakwana kusvika paL* kukosha kwe≤12 (CIE Lab), zvichizadzisa zvinodiwa zvemachira ekuvaka nemaindasitiri. Kupararira kwehukuru hwezvidimbu zvidiki zvekabhoni dema rakapfava, kazhinji kuri pakati pe20-30 nm, kunoita kuti pave neruvara rwakafanana pasina manzwi asingadiwe, zvichidzivirira mavara ebrown kana ebhuruu anogona kuitika nemavara matema ekabhoni asingawirirani. Kuongororwa kwemamiriro ekunze kwakakurumidza (ASTM G154) kwakaratidza kuti machira eacrylic ane dema rekabhoni dema rakapfava anochengetedza 80% yeruvara rwayo rwepakutanga (ΔE ≤2) mushure memaawa 2000 ekuratidzwa, zvichipfuura machira ane pigment dema reorganic, ayo anochengeta 60% chete yeruvara rwayo. Kusapindirana nemamiriro ekunze uku kunoita kuti carbon black isina kusimba ive sarudzo yakanaka yekupenda panze nemvura, senge pendi dzekunze dzemadziro nesimbi.

Mukugadzirwa uye kuwanikwa kwekabhoni nhema ine viscosity yakaderera, kudzora mhando uye rutsigiro rwehunyanzvi ndizvo zvakakosha. Magiredhi akasarudzika akagadzirirwa makemikari akasiyana-siyana ekuputira anowanikwa. Magiredhi aya anochengetedza hunhu hwakafanana, kusanganisira nzvimbo yeBET ye200-240 m²/g, kukosha kweDBP yekunyudzwa kwe90-100 cm³/100g, uye pH isina kusimba ye6.5-7.5 kudzivirira kukanganisa kuputira. Kudzora kwakasimba kwehuwandu hwesimbi inorema, ine lead ≤0.0005% uye arsenic ≤0.0003%, inoita kuti zvienderane nezvinodiwa pasi rose zvezvakatipoteredza zvakaita seLEED neEurofins.

Kutakura zvinhu kunoita basa rakakosha mukugadzirwa kwechinhu chine kabhoni nhema shoma. Mabhegi anonyungudika mumvura (25 kg/bhegi) anoshandiswa kuita kuti zvive nyore kupararira mumvura, zvichibvisa kudiwa kwekuvhura mabhegi uye kuderedza njodzi yeguruva nekusvibiswa. Pakugadzirwa kukuru, magaba e500 kg ane mavharuvhu ekuburitsa zvinhu anowanikwa kuti apihwe zvekudya otomatiki. Ne network yepasi rose yekutumira zvinhu inofukidza nzvimbo huru dzekugadzira macoating muEurope, Asia, neSouth America, nguva yekutumira inotangira pamazuva gumi nemaviri kusvika makumi maviri nemashanu. Chikwata chemushure mekutengesa chinopa rutsigiro panzvimbo yacho.

Nguva yekutumira: Gunyana-04-2025