Zvinhu zvehunyanzvi zvekushandisa Polyurethane Field Spraying neFoam Rigid
Zvinhu zvinodzivirira furo re polyurethane (PU) ipolymer ine chikamu checarbamate chinodzokororwa, chinoumbwa nekuita kwe isocyanate ne polyol. Nekuda kwekudzivirira kwayo kupisa kwakanaka uye kushanda kwayo kwemvura, inoshandiswa zvakanyanya mukudzivirira madziro nedenga, pamwe nekuchengetera zvinhu zvinotonhora, nzvimbo dzekuchengetera zviyo, dzimba dzekuchengetera zvinhu, mapaipi, magonhi, mahwindo nedzimwe nzvimbo dzekudzivirira kupisa.
Parizvino, kunze kwekushandisa denga rekudzivirira kupisa uye kudzivirira mvura, inoshandawo zvakasiyana-siyana zvakaita senzvimbo dzekuchengetera zvinhu zvinotonhora uye kuisa makemikari makuru kusvika pakati nepakati.
Tekinoroji yakakosha yekuvaka furo rakasimba repolyurethane spray
Kugona kushandisa tekinoroji yekupfapfaidza yakagadzirwa nefoam polyurethane kwakaoma nekuda kwematambudziko angangoitika akadai semaburi asina kuenzana efoam. Zvakakosha kudzidzisa vashandi vekuvaka kuitira kuti vagone kubata matekiniki ekupfapfaidza nemazvo uye kugadzirisa matambudziko ehunyanzvi anosangana nawo panguva yekuvaka. Matambudziko makuru ehunyanzvi mukuvaka kwekupfapfaidza anonyanya kutarisa pazvinhu zvinotevera:
Kudzora nguva yekucheneswa kweganda uye mhedzisiro yeatomization.
Kuumbwa kwefuro repolyurethane kunosanganisira matanho maviri: kuputira furo uye kupodza.
Kubva padanho rekusanganisa kusvika pakupera kwehuwandu hwefuro - maitiro aya anozivikanwa sekufuridzira furo. Munguva iyi, kufanana mukugoverwa kwemaburi emabubble kunofanirwa kufungwa nezvako kana huwandu hwakawanda hwe reactive hot ester hukaburitswa musystem panguva yekupfapfaidza. Kufanana kwemabubble kunonyanya kuenderana nezvinhu zvakaita se:
1. Kutsauka kwehuwandu hwezvinhu
Pane musiyano mukuru pakati pemabhuru anogadzirwa nemuchina uchienzaniswa neeakagadzirwa nemaoko. Kazhinji, zviyero zvezvinhu zvakagadziriswa nemuchina zvinosvika 1:1; zvisinei nekuda kwemazinga akasiyana ekusimba pakati pezvinhu zvichena zvevagadziri vakasiyana - zviyero zvezvinhu chaizvo zvinogona kusaenderana nezvikamu izvi zvakagadziriswa zvichikonzera kusiyana kwehuwandu hwefuro zvichibva pakushandiswa zvakanyanya kwechinhu chichena kana chitema.
2. Tembiricha iri pakati nepakati
Mafuro epolyurethane anonyanya kukanganiswa nekuchinja-chinja kwekushisa; maitiro avo ekufuridza furo anoenderana zvakanyanya nekuwanikwa kwekupisa kunobva mukuita kwemakemikari mukati mehurongwa pamwe chete nezvinodiwa nezvakatipoteredza.
Kana tembiricha yekunze yakakwira zvakakwana kuti ipe kupisa kwezvakatipoteredza - inokurumidza kukurumidza kuita zvinoita kuti pave nemafuro akazara ane huwandu hwakafanana kubva pamusoro kusvika pakati.
Kusiyana neizvi, kana tembiricha yakaderera (semuenzaniso, iri pasi pe18°C), kumwe kupisa kunonyangarika munzvimbo dzakatenderedza zvichikonzera nguva refu yekupisa pamwe nekuwedzera kwehuwandu hwekuumbwa kwechinhu, zvichiwedzera mari yekugadzira.
3. Mhepo
Munguva yekupfapfaidza mhepo inofanira kuramba iri pasi pe5m/s; kupfuura chiyero ichi kunobvisa kupisa kunokonzerwa nekuita kwemvura kunokanganisa furo nekukurumidza ukuwo zvichiita kuti pamusoro pechigadzirwa pave nechando.
4. Tembiricha yepakati & hunyoro
Kupisa kwemadziro epasi kunokanganisa zvakanyanya kushanda zvakanaka kwepolyurethane panguva yekushandiswa, kunyanya kana tembiricha yekunze nemadziro epasi yakaderera - kupinza nekukurumidza kunoitika mushure mekuputirwa kwekutanga kunoderedza goho rezvinhu.
Saka kuderedza nguva dzekuzorora masikati panguva yekuvaka pamwe chete nehurongwa hwehurongwa hwehurongwa hwekuvaka kwakakosha pakuona kuti foam polyurethane inowedzera nekukurumidza.
Foam yePolyurethane yakamanikana inomiririra chigadzirwa chepolymer chinoumbwa kuburikidza nekuita pakati pezvikamu zviviri - Isocyanate nePolyether yakasanganiswa.
Zvikamu zveIsocyanate zvinosangana nyore nyore nemvura inogadzira urea bonds; kuwedzera kwehuwandu hweurea bond kunoita kuti furo rive rakapfava ukuwo richideredza kunamira pakati pazvo nesubstrates saka zvinoda kuti nzvimbo dzakachena dzakaoma dzesubstrate dzisave nengura/guruva/hunyoro/kusvibiswa kunyanya kudzivirira mazuva ekunaya kwemvura apo dova/chando zvinoda kubviswa zvichizoomeswa usati waenderera mberi.
Nguva yekutumira: Chikunguru-16-2024