Izinto ezithinta ukulinganiswa kwezinga lempushana

Izinto Ezithinta Ukulinganiswa Kwe Amakhava wePowder

I-Powder coating iwuhlobo olusha lwe-solvent-free 100% ye-powder eqinile. Inezigaba ezimbili eziyinhloko: i-thermoplastic powder coatings kanye ne-thermosetting powder coatings. Upende wenziwe nge-resin, i-pigment, i-filler, i-ejenti yokuphulukisa nezinye izinto ezisizayo, ezixutshwe ngesilinganiso esithile, bese zilungiswa ngokukhipha okushisayo nokuhlunga nokuhlunga. Zigcinwa ekamelweni lokushisa, ezinzile, isifutho electrostatic noma fluidized embhedeni dip enamathela, ukushisisa futhi baking ncibilika ukuqina, ukuze ukwakheka bushelelezi futhi ehlala isikhathi eside enamathela ifilimu, ukufeza inhloso umhlobiso kanye nokuvikelwa ukugqwala.

Okubizwa ngokuthi ukulinganisa kopende kusho ukuthi ifilimu yepende ibushelelezi ngemva kokufakwa. Indawo esezingeni elifanele akufanele ibe nokungahambi kahle okufana nekhasi lewolintshi, izimpawu zebhulashi, ukubola, nezimbobo zokushwabana. Imvamisa, abantu babuka ngqo iso lenyama ngokuqhathanisa isampula nesampula ejwayelekile ukuze bahlole izinga lokuleveliya kwefilimu. Le ndlela iyahlukahluka kumuntu nomuntu futhi inokuzithoba okuqinile. Indlela yokuskena ye-wavelength esetshenziswa embonini yezimoto ukuze ibonise isimo esingaphezulu sefilimu yokumboza inomphumela wokulinganisa okuncane. Kusetshenziswa izikena zamagagasi amade (10-0.6 mm) kanye ne-short-wave (0.6-0.1 mm), futhi inani elilinganisiwe liphakathi kuka-0 no-100. Uma liphansi inani, liba bushelelezi indawo enamathelayo futhi kuba ngcono izinga.
Izici ezithinta impahla yokukala ye-powder coating ikakhulukazi zifaka izici ezinhlanu:

Okokuqala, ukuncibilika viscosity of powder ezinengilazi

Ezimbotsheni zempuphu ye-thermosetting, enqubweni yokuncibilika kokuncibilika, ngokusabela kokwelapha kwe-cross-link, izinga lokushisa liphezulu, ukusabela kokwelapha ngokushesha, i-viscosity yesistimu ikhuphuka ngokushesha, isikhathi sokugeleza siba mfishane, kanye nokuncipha kokulinganisa. Ngakho-ke, lapho sikhetha i-resin, sikhetha i-resin ene-viscosity ephansi, ekhombisa umsebenzi ohamba kancane, ukuze ukumboza kube nesikhathi esanele sokuphuma.

Okwesibili, ukulinganisa izithasiselo

Izinsiza ezifanele zokulinganisa zengezwa ekwakhiweni kwe-powder coating. Lapho i-powder coating incibilika, lezi zithasiselo zinganciphisa ngokushesha ukushuba kwesimo se-coating, zikhuthaze ukugeleza okusheshayo kwe-coating ngaphambi kokuphulukisa nokuqeda noma ukunciphisa ikhasi lewolintshi, izimpawu zokuxubha, nama-ripples. , Ukushwabana nokunye ukonakala kwendawo.

Okwesithathu, ukukhetha kwe-pigment

Ngaphambi kokulinganisa imibala, akumelwe nje sihambisane ne-hue yemibala ehlukahlukene, kodwa futhi sicabangele ukumuncwa kwamafutha kanye nenani le-pigment ngayinye. Ukumuncwa kwamafutha kwezingulube ze-inorganic kuncane kakhulu kunokwakheka kwe-organic pigments, ngakho-ke singazama ukugwema ukusetshenziswa kombala wemvelo. Isamba esiphelele semibala ehlukahlukene kufanele silungiswe ngokuya ngezidingo zamakhasimende zokumboza. Ngisho noma i-pigment inokumunca uwoyela ophansi, ukweqisa kungadala ukuthi izinga liwohloke.

Okwesine, ukukhetha kokugcwalisa

Kuyaziwa ukuthi ama-fillers e-powder coatings awagcini nje ukunciphisa izindleko kodwa futhi athuthukisa izakhiwo ze-powder coatings, ikakhulukazi ukumelana nokugqoka. Kodwa-ke, ukugcwalisa okungalungile kuzonikeza impusha igalelo elibulalayo. Kufuzoral, ukumuncwa kwamafutha e-barium sulfate kuncane kune-calcium carbonate, i-kaolin, i-mica powder, i-quartz powder, i-silicon powder, njll. Uma ubukhulu bebubanzi bube bucwebe futhi buphakama isicwebezelisi, kulapho usayizi wezinhlayiyana wezinye izigcwalisi ucoleka kakhulu. ukumuncwa kukawoyela kanye nokukhuphuka kancane kancane.

Okwesihlanu, inqubo yokwelapha

Kukhona inqubo yokwenyuka kwezinga lokushisa lapho i-powder coating ibhakwa. Isivinini sezinga lokushisa sinethonya elibaluleke kakhulu ekulinganisweni kwe-coating.
Ngamafuphi, ucabangela i-overall isakhiwo sefomula, kufanele siqale sikhethe i-viscosity ephansi, i-resin esabela kancane njengesisekelo esiyinhloko, sengeze inani elanele le-ejenti yokulinganisa, futhi sisebenzise i-pigments ne-filer (i-barium sulfate) enokumuncwa kwamafutha aphansi. Ukwengeza, amapharamitha wenqubo alungiswa ngokufanele ohlelweni lwe-extrusion nokugaya ukuze kuzuzwe impahla yokubukeka okwengeziwe.