Nhasi tichatarisa maitirwo ekuwedzera mhando dzezvikukutu.
Mhando dzezvinyanya kushandiswa zvakanyanya ndedzisina kugadzirwa, cellulose, acrylic, uye polyurethane.
Zvisiri zvechisikigo
Zvinhu zvisina kugadzirwa makemikari zvinonyanya kuve bentonite, fumed silicon, nezvimwewo, izvo zvinowanzoiswa mutsvina kuti zvikuyiwe, nekuti zvakaoma kuzviparadzira zvachose nekuda kwesimba remusanganiswa wependi.
Kunewo chikamu chidiki chichazoparadzirwa chogadzirwa kuita gel kuti chishandiswe.
Zvinogona kuwedzerwa papendi nekukuya kuti pave nehuwandu hwakati hwe pre-gel. Kunewo mamwe ari nyore kuparadzira uye anogona kugadzirwa kuita gel nekukurunga nekukurumidza. Munguva yekugadzirira, kushandisa mvura inodziya kunogona kukurudzira maitiro aya.
Serosi
Chinhu chinoshandiswa zvakanyanya mu cellulosic ndechekutihydroxyethyl cellulose (HEC). Kuyerera kwakashata uye kusaenzana, kusakwana kwemvura, kudzivirira chakuvhuvhu nezvimwe zvinhu, hazviwanzo shandiswa mumapendi emaindasitiri.
Kana ikashandiswa, inogona kuwedzerwa zvakananga kana kunyungudutswa mumvura pachine nguva.
Usati wawedzera, nyatsocherechedza kugadzirisa pH yesystem kuti ienderane nemamiriro ealkaline, izvo zvinoita kuti ikure nekukurumidza.
Acrylic
Zvishandiso zvinosimbisa ruvara rweacrylic zvine mamwe mashandisirwo azvo mumapendi emaindasitiri. Zvinonyanya kushandiswa mumachira echinyakare akadai sechikamu chimwe chete uye chiyero chepamusoro chepigment-to-base, zvakaita sesimbi nema primer ekudzivirira.
Mu topcoat (kunyanya clear topcoat), ine zvikamu zviviri, baking varnish, high-gloss pendi nedzimwe nzira, ine zvimwe zvikanganiso uye haigone kunyatsoshanda zvakanaka.
Pfungwa yekukora kwe acrylic thickener ndeyekuti: boka re carboxyl riri pa polymer chain rinoshandurwa kuita ionized carboxylate pasi pemamiriro e alkaline, uye mhedzisiro yekukora inowanikwa kuburikidza nekudzoserwa kwe electrostatic.
Saka, pH yemuchina inofanira kugadziriswa kuita alkaline usati washandisa, uye pH inofanirawo kuchengetwa pa >7 panguva yekuchengetwa kunotevera.
Inogona kuwedzerwa zvakananga kana kusanganiswa nemvura.
Inogona kunyungudutswa kare kuti ishandiswe mune mamwe masisitimu anoda kugadzikana kwakanyanya kwe viscosity. Zvinoreva kuti: tanga wasanganisa acrylic thickener nemvura, wobva wawedzera pH adjuster uchikurunga. Panguva ino, mhinduro yacho inokora zviri pachena, kubva pachena semukaka kusvika paste inopenya, uye inogona kusiiwa kuti ishandiswe gare gare.
Kushandisa nzira iyi kunodzima kushanda kwekuwedzera kwehukobvu, asi kunogona kuwedzera hukobvu hwacho pakutanga, izvo zvinoita kuti hukobvu hurambe hwakagadzikana mushure mekunge pendi yagadzirwa.
Mukugadzirwa uye kugadzirwa kwependi yeH1260 yehupfu hwesirivha ine chikamu chimwe chete chemvura, chinhu chinogozha chinoshandiswa nenzira iyi.
Polyurethane
Zvishongedzo zvepolyurethane zvinoshandiswa zvakanyanya mumachira eindasitiri zvine mashandiro akanaka uye zvakakodzera kushandiswa mumasisitimu akasiyana-siyana.
Pakushandisa, hapana chinodiwa pa pH yemuchina, inogona kuwedzerwa zvakananga kana mushure mekusanganiswa, kungave nemvura kana solvent. Zvimwe zvinogodza zvine hydrophilicity yakaderera uye hazvigone kusanganiswa nemvura, asi zvinogona kusanganiswa chete ne solvents.
sisitimu ye emulsion
Masisitimu emulsion (kusanganisira acrylic emulsions nehydroxypropyl emulsions) haana zvinonyungudutsa uye zviri nyore kugokora. Zvakanaka kuawedzera mushure mekugokora. Paunenge uchigokora, zvichienderana nekushanda kwemugokora, wedzera chiyero chakati.
Kana kushanda nesimba kwekuwedzera kuine simba kwakaderera, chiyero chekudzikisa chinofanira kunge chakaderera kana kuti chisina kudzikisa simba; kana kushanda nesimba kwekuwedzera kuine simba kwakakwira, chiyero chekudzikisa simba chinofanira kunge chakakwira.
Semuenzaniso, SV-1540 water-based polyurethane associative thickener ine simba guru rekukora. Kana ikashandiswa mu emulsion system, inowanzo sanganiswa kagumi kana makumi maviri (10% kana 5%) kuti ishandiswe.
Kupararira kweHydroxypropyl
Hydroxypropyl dispersion resin pachayo ine huwandu hwakati hwe solvent, uye hazvisi nyore kukora panguva yekugadzira pendi. Saka, polyurethane inowanzowedzerwa mu dilution ratio yakaderera kana kuwedzerwa pasina dilution mumhando iyi yesystem.
Zvakakosha kuziva kuti nekuda kwekushandiswa kwezvinyungudutsa zvakawanda, simba rekukora kwezvinyungudutsa zvakawanda zvepolyurethane mumhando iyi yesystem harisi pachena, uye chinyungudutsa chakakodzera chinofanira kusarudzwa nenzira yakatarwa. Pano, ndinoda kukurudzira chinyungudutsa cheSV-1140 chemvura chakavakirwa papolyurethane associative, chine simba guru rekukora uye chinoshanda zvakanaka mumasystem ane solvent yakawanda.
Nguva yekutumira: Kubvumbi-25-2024