Izici Zobuchwepheshe Zokufafaza Insimu Ye-Polyurethane Eqinile Ye-Foam
Izinto zokufaka i-polyurethane (PU) eziqinile ziyi-polymer eneyunithi yesakhiwo ephindaphindayo yesigaba se-carbamate, eyakhiwe ukusabela kwe-isocyanate ne-polyol. Ngenxa yokufakwa kwayo okuhle kakhulu kokushisa kanye nokusebenza kwayo okungangeni manzi, ithola ukusetshenziswa okubanzi ekufakweni kodonga nophahla lwangaphandle, kanye nasezindaweni zokugcina izinto ezibandayo, ezindaweni zokugcina okusanhlamvu, emakamelweni okugcina izinto, emapayipini, eminyango, emafasiteleni nakwezinye izindawo ezikhethekile zokufaka i-thermal insulation.
Njengamanje, ngaphandle kokufakwa kokuvikela uphahla kanye nokuvimbela amanzi, kusiza ngezinjongo ezahlukahlukene njengezindawo zokugcina izinto ezibandayo kanye nokufakwa kwamakhemikhali amakhulu kuya kwaphakathi.
Ubuchwepheshe obuyinhloko bokwakha i-polyurethane spray eqinile
Ubuchwepheshe bokufafaza nge-polyurethane eqinile buletha izinselele ngenxa yezinkinga ezingaba khona njengemigodi ye-foam engalingani. Kubalulekile ukuthuthukisa ukuqeqeshwa kwabasebenzi bokwakha ukuze bakwazi ukusingatha kahle amasu okufafaza nokuxazulula izinkinga zobuchwepheshe ezihlangatshezwana nazo ngesikhathi sokwakha. Izinselele zobuchwepheshe eziyinhloko ekwakhiweni kokufafaza zigxile kakhulu kulezi zici ezilandelayo:
Ukulawula isikhathi sokwenza mhlophe kanye nomphumela we-atomization.
Ukwakheka kwe-polyurethane foam kuhilela izigaba ezimbili: ukwenziwa kwe-foam kanye nokulungiswa kwe-foam.
Kusukela esigabeni sokuxuba kuze kube yilapho ukwanda kwevolumu ye-foam kuphela - le nqubo yaziwa ngokuthi i-foam. Phakathi nalesi sigaba, ukufana ekusabalalisweni kwemigodi ye-bubble kufanele kucatshangelwe lapho inani elikhulu le-ester eshisayo esabelayo likhishwa ohlelweni ngesikhathi sokufafaza. Ukufana kwe-bubble ngokuyinhloko kuncike ezintweni ezifana nalezi:
1. Ukuphambuka kwesilinganiso sezinto ezibonakalayo
Kukhona ukwehluka okukhulu kobuningi phakathi kwamabhamuza akhiqizwe ngomshini uma kuqhathaniswa nalawo akhiqizwe ngesandla. Ngokuvamile, izilinganiso zezinto eziqiniswe ngomshini ziyi-1:1; noma kunjalo ngenxa yamazinga ahlukahlukene e-viscosity phakathi kwezinto ezimhlophe zabakhiqizi abahlukene - izilinganiso zezinto zangempela zingase zingahambisani nalezi zilinganiso eziqinisiwe okuholela ekungafanini kobuningi be-foam ngokusekelwe ekusetshenzisweni ngokweqile kwezinto ezimhlophe noma ezimnyama.
2. Izinga lokushisa eliphakathi
Ama-foam e-polyurethane azwela kakhulu ekushintsheni kwezinga lokushisa; inqubo yawo yokwenza amagwebu incike kakhulu ekutholakaleni kokushisa okuvela kokubili ekuphenduleni kwamakhemikhali ngaphakathi kohlelo uqobo kanye nezinhlinzeko zemvelo.
Uma amazinga okushisa asezingeni eliphezulu ngokwanele ukuze kuhlinzekwe ngokushisa kwemvelo - kusheshisa isivinini sokusabela okuholela kuma-foam anwetshiwe ngokugcwele anobukhulu obufanayo obuvela phezulu kuya enkabeni.
Ngakolunye uhlangothi, emazingeni okushisa aphansi (isb., ngaphansi kuka-18°C), ukushisa okuthile kokusabela kuyanyamalala endaweni ezungezile okubangela izikhathi zokuqina ezinde kanye namazinga okuncipha kokubumba ngaleyo ndlela kukhuphule izindleko zokukhiqiza.
3. Umoya
Ngesikhathi sokufafaza, isivinini somoya kufanele sihlale singaphansi kwama-5m/s; ukudlula lo mkhawulo kuphephula ukushisa okubangelwa ukusabela okuthinta ukugqwala okusheshayo ngenkathi kwenza izindawo zomkhiqizo zibe buthaka.
4. Izinga lokushisa eliyisisekelo kanye nomswakama
Amazinga okushisa odonga oluyisisekelo athinta kakhulu ukusebenza kahle kwe-polyurethane ngesikhathi sezinqubo zokufaka ikakhulukazi uma amazinga okushisa odonga oluzungezile nolusisekelo ephansi - ukumuncwa okusheshayo kwenzeka ngemva kokumbozwa kokuqala kunciphisa isivuno sezinto ezisetshenziswayo.
Ngakho-ke ukunciphisa izikhathi zokuphumula emini ngesikhathi sokwakha kanye namalungiselelo okuhlela amasu kuba yinto ebalulekile ekuqinisekiseni amazinga aphezulu okukhulisa i-polyurethane ye-foam eqinile.
I-Rigid Polyurethane Foam imele umkhiqizo we-polymer owakhiwe ngokusebenzisa ukusabela phakathi kwezingxenye ezimbili - i-Isocyanate kanye ne-Combined Polyether.
Izingxenye ze-Isocyanate zisabela kalula kuma-urea bond akhiqiza amanzi; ukwanda kokuqukethwe kwe-urea bond kwenza amagwebu aphumele ekubeni aqhekeke ngenkathi kunciphisa ukunamathelana phakathi kwawo kanye nama-substrate ngakho-ke kudingeke izindawo ezihlanzekile ze-substrate ezomile ezingenayo i-rust/uthuli/umswakama/ukungcola ikakhulukazi ukugwema izinsuku zemvula lapho ukuba khona kwamazolo/iqhwa kudinga ukususwa kulandelwe ukomiswa ngaphambi kokuqhubeka.
Isikhathi sokuthunyelwe: Julayi-16-2024