Zvinhu zvinokanganisa kuenzana kwehupfu

Zvinhu Zvinokanganisa Kukwidziridzwa kwe Upfu Coatings

Powder coating imhando nyowani yekunyungudutsa-isina 100% yakasimba poda yekuputira. Iine mapoka makuru maviri: thermoplastic powder coatings uye thermosetting poda coatings. Iyo pendi inogadzirwa ne resin, pigment, filler, kuporesa mumiririri uye zvimwe zvinobatsira, zvakasanganiswa mune imwe chikamu, uye zvino inogadzirirwa nekupisa extrusion uye kupepeta uye sieving. Ivo vanochengetwa mukamuri tembiricha, yakatsiga, electrostatic spraying kana fluidized mubhedha dip coating, reheating uye kubheka kunyunguduka solidification, kuitira kuti paumbwe yakatsetseka uye inogara kwenguva refu coating firimu, kuzadzisa chinangwa chokushongedza uye ngura kudzivirira.

Iyo inonzi leveling yepende inoreva kuti firimu repende rinotsetseka mushure mekuiswa. Iyo yakanaka yekumisikidza nzvimbo haifanirwe kunge isina zvimiro zvakaita seorenji peel, mabrashi mamaki, corrugations, uye shrinkage maburi. Kazhinji, vanhu vanotarisa zvakananga ziso rakashama nekuenzanisa sampuli neyakajairwa sampu yekuongorora nhanho yekuputira firimu kuyera. Iyi nzira inosiyana kubva kumunhu kuenda kumunhu uye ine yakasimba subjectivity. Iyo wavelength scanning nzira inoshandiswa muindasitiri yemotokari kuratidza mamiriro epamusoro eiyo firimu yekuputira ine semi-quantitative maitiro. Yakareba-wave (10-0.6 mm) uye pfupi-wave (0.6-0.1 mm) scans inoshandiswa, uye iyo yakayerwa kukosha iri pakati pe0 ne100. Iyo yakaderera kukosha, iyo inotsvedzerera yekuvhara pamusoro uye zviri nani kuenzana.
Izvo zvinhu zvinokanganisa chiyero cheiyo poda coating zvinonyanya zvinosanganisira zvishanu zvinhu:

Kutanga, iyo yakanyunguduka viscosity yehupfu coatings

Kune thermosetting powder coatings, mukunyunguduka kuyerera, ne-cross-link curring reaction, kukwirisa tembiricha, kukurumidza kurapa maitiro, nekukurumidza viscosity yehurongwa inosimuka, kupfupika kwekuyerera, uye kushomeka kwemazinga. Naizvozvo, pakusarudza resin, tinosarudza resin ine yakaderera viscosity, iyo inoratidza inononoka basa, kuitira kuti kupfekedza kuve nenguva yakakwana yekudzikamisa.

Chechipiri, kuenzanisa zvinowedzera

Zviyamuro zvakakodzera zvekuenzanisa zvinowedzerwa kune kugadzirwa kwehupfu. Kana iyo poda yakanyungudutswa, izvi zvinowedzera zvinogona kukurumidza kudzikisa kusimba kwepamusoro kwejasi, kukurudzira kuyerera nekukurumidza kwejasi risati rapora uye kubvisa kana kuderedza peel yeorenji, mavara ebhurashi, uye ripples. , Shrinkage uye humwe hurema hwepamusoro.

Chechitatu, kusarudzwa kwe pigment

Pamberi pekufananidza mavara, hatifaniri kungofananidza hue yemavara akasiyana-siyana, asiwo funga nezvekutorwa kwemafuta uye chiyero chepigment imwe neimwe. Kutorwa kwemafuta einorganic pigments kudiki pane yeorganic pigment, saka tinogona kuedza kudzivirira kushandiswa kwe organic pigments. Iyo yakazara chikamu cheakasiyana pigment inofanira kugadziridzwa zvinoenderana nezvinodiwa nevatengi zvekufukidzira. Kunyangwe iyo pigment ine yakaderera kunyudza mafuta, yakawandisa inogona kukonzera mwero kudzikira.

Chechina, sarudzo yekuzadza

Zvinonyatsozivikanwa kuti mafirita muhupfu haangodzikisi mari chete asiwo anovandudza maitiro ehupfu hwekuputira, kunyanya kupfeka kuramba. Zvisinei, kuzadza kusina kufanira kuchapa hupfu hunouraya. Mune general, kunyura kwemafuta e barium sulfate idiki pane kuya kwe calcium carbonate, kaolin, mica powder, quartz powder, silicon powder, etc. Iyo dhayamita yakapfava uye nekukwirira kupenya, kukwenenzvera saizi yeimwe particle kunyura kwemafuta uye kuderera kwekuenzanisa.

Chechishanu, nzira yekurapa

Pane tembiricha-kukwira maitiro kana poda coating yakabikwa. Iyo yekumhanyisa kweyero yekudziya ine simba rakakosha padanho rejasi.
Muchidimbu, tichifunga nezve ovhenirall fomula chimiro, isu tinofanirwa kutanga tasarudza iyo yakaderera-viscosity, inononoka-inopindura resin sechinhu chikuru chigadziko, tichiwedzera huwandu hwakakwana hweajenti yekuenzanisa, uye kushandisa pigment uye filer (barium sulfate) ine yakaderera kunyudza mafuta. Uye zvakare, iwo maitiro paramita anogadziridzwa zvakafanira mukuita extrusion uye milling kuti iwane imwe chitarisiko chivakwa.