Iyini i-Expandable PU Foam Futhi Isebenza Kanjani?

Emikhakheni yokwakha kanye neyokukhiqiza, ukuthola ukuvikela okuphezulu ngenkathi kugcinwa ubuqotho besakhiwo kudala inselele engapheli. Cabanga ngenkinga ebhekene nabakhi kanye nabakhiqizi ngokufanayo lapho izinto zokuvikela zendabuko zehluleka ukuletha ukusebenza kahle kwamandla okwanele noma zinqotshwa yimithelela yemvelo ngokuhamba kwesikhathi. Ukwembulwa kwesisombululo esiphezulu kusemkhakheni we-expandable polyurethane (PU) foam, into engagcini nje ngokubhekana nalezi zinkinga eziphuthumayo kodwa futhi ibe yitshe lesisekelo ekusetshenzisweni okuhlukahlukene ngenxa yezakhiwo zayo eziphawulekayo.

I-Expandable PU foam iyanconywa ngokuguquguquka kwayo, imiphumela yemfundiso, kanye nezinzuzo zomhlaba wangempela kuzo zonke izimboni ezahlukahlukene. Ukwakheka kwayo okuhlukile kuyivumela ukuthi ingagcini nje ngokukhula lapho isetshenziswa kodwa futhi idale isithiyo esisebenzayo ngokumelene nomswakama, ukuvuza komoya, kanye nokungcola kwemvelo. Leli khwalithi alinikezi nje izinzuzo zokuvikela ngokushesha, kodwa futhi nokuqina kwesikhathi eside, okwenza kube umthombo obalulekile wamabhizinisi alwela ukusimama kanye nokonga izindleko.

Ukuqonda i-Expanded PU Foam

I-foam ye-PU enwebekayo yakhiwa uhlelo olunezingxenye ezimbili, lapho luxutshwa, lubhekana nokusabela kwamakhemikhali okuholela ekukhuleni okusheshayo. Le foam yakhiwe ngokuyinhloko nge-polyurethane, ekhiqizwa kusetshenziswa ama-polyol nama-isocyanates. Lapho isabela nge-ejenti yokufutha, ngokuvamile amanzi noma ezinye izinto ezikhiqiza igesi, i-foam iyanda kakhulu, ngokuvamile ngokuphindwe izikhathi ezingu-20 kuya kwezingu-30 zomthamo wayo wokuqala.

Leli khono lokunweba yilona elihlukanisa i-PU foam enwebekayo nezinto zokwemba ezivamile. I-foam ephumayo ilula kodwa isebenza kahle kakhulu ekugcwaliseni izikhala nasekuhlinzekeni ngokushisa okuzwakalayo nokushisa. Ukusetshenziswa kwayo kuvame ukubonakala kumaphrojekthi okwakha, izinto zokupakisha, izingxenye zezimoto, kanye nezinto zikagesi. Izakhiwo zokushisa eziphakeme zigcizelelwa ukuhanjiswa kokushisa okuphansi, ngokuvamile kusuka ku-0.022 kuya ku-0.038 W/m°C, okuvumela ukuthi kuncishiswe kakhulu ukudluliselwa kokushisa futhi kwehlise izindleko zamandla ezakhiweni zokuhlala nezebhizinisi.

Ngokuphathelene nokusetshenziswa, i-PU foam enwebekayo isetshenziswa ngezindlela ezahlukahlukene, okuhlanganisa ukufutha, ukuthulula endaweni, kanye nezindlela ze-foam ezifakwe injektha. Lokhu kuvumelana nezimo akugcini nje ngokwenza kube lula ukufakwa kodwa futhi kuqinisekisa ukumbozwa okuphelele kumajiyometri ayinkimbinkimbi noma ezindaweni ezivalekile. Ukuvalwa okwenziwe yi-foam lapho iqina kufeza injongo ekabili: kusebenza njengesivikelo sokuvikela futhi kusebenza njengesinamathelisi sesakhiwo kwezinye izinhlelo zokusebenza, kuthuthukisa amandla okuthwala umthwalo.

Indlela Yokusebenza

Ukusebenza kahle kwe-PU foam enwebekayo kubangelwa kakhulu isayensi ngemuva kokudalwa kwayo kanye nokusetshenziswa kwayo. Lapho izingxenye zixutshwa, kuqala ukusabela kwe-exothermic, okubangela ukuthi i-polyol kanye ne-isocyanate kuhlangane. Lokhu kusabela kukhipha igesi ye-carbon dioxide, ebhajwe ngaphakathi kwe-polymer matrix, okuholela ku-foam. Njengoba i-foam ikhula, ingena kuyo yonke imifantu, idale uphawu olungangeni moya olubalulekile ekufakweni kwe-insulation.

Indlela exakile yokusabela isho ukuthi igwebu likhiqiza ukushisa njengoba liphola. Lesi simo asigcini nje ngokusheshisa izikhathi zokuphola kodwa futhi sinegalelo ezimpahleni zegwebu. Njengoba liphola futhi liqina, lingamelana nengcindezi enkulu kanye nokucindezeleka, okwenza lifanelekele ukusetshenziswa okudinga ukuqina.

Ngaphezu kwalokho, ukwakheka okuguquguqukayo kuvumela izinketho ezahlukahlukene zobuningi kanye nokuqina. Ama-foam aguquguqukayo avame ukusetshenziswa efenisha nasemamatileni, kanti ama-foam aqinile kakhulu afanelekela ukufudumala ezimvilophini zokwakha. Lokhu kuhlela ngokwezifiso kunenzuzo kubakhiqizi njengoba kuvumela izixazululo ezenzelwe wena ngokusekelwe ezidingweni ezithile zephrojekthi, kungakhathaliseki ukuthi lokho kuhilela amandla aphezulu okuthwala umthwalo noma ukumelana okuthuthukisiwe kokushisa.

Ngaphezu kwalokho, ukumelana kwamanzi ngokwemvelo kwe-foam kanye nezakhiwo zokulwa nesikhunta kuthuthukisa ukusebenza kwayo ezindaweni ezivame ukuchayeka kumswakama, njengekhishi nezindlu zangasese. Lokhu kuqina akugcini nje ngokwandisa isikhathi sokuphila kwento kodwa futhi kunegalelo ezimweni zokuphila ezinempilo ngokuvimbela ukukhula kwesikhunta.

Izicelo Ezimbonini Ezihlukahlukene

Uhlobo oluguquguqukayo lwe-PU foam enwebekayo luvumela ukusetshenziswa okubanzi kwezimboni eziningi. Ekwakhiweni, isibonelo, isetshenziselwa izindonga, uphahla, kanye nezisekelo, ihlinzeka ngokusebenza okuphezulu kokushisa ngenkathi isebenza njengesithiyo esingangenwa umswakama. Lokhu kusebenza okubili kuthuthukisa kakhulu izilinganiso zokonga amandla, okwenza izakhiwo zihlale isikhathi eside futhi kunciphisa izindleko zokusebenza zesikhathi eside.

Embonini yezimoto, i-PU foam enwebekayo isetshenziswa kakhulu ekusetshenzisweni kwangaphakathi, okuhlanganisa izihlalo kanye nokuvimbela umsindo. Izakhiwo ze-foam ezilula kodwa eziqinile zinegalelo ekunciphiseni isisindo semoto iyonke, zithinta kahle ukusebenza kahle kukaphethiloli ngaphandle kokubeka engcupheni induduzo noma ukuphepha kwabagibeli. Ngaphezu kwalokho, abakhiqizi bayisebenzisela ukuvikela ukushayisana, ukuqinisekisa kokubili ukuphepha kwabagibeli kanye nobude bomkhiqizo.

Ukupakisha kungenye indawo ezuze kakhulu ezintweni ezintsha ze-PU foam enwebekayo. Ngokufuna ukusimama, amabhizinisi ashintsha kusuka ezintweni zendabuko ezifana ne-polystyrene aye kwezinye izindlela ezinobungani nemvelo. Izithako ze-foam ezibunjwe ngokwezifiso zivikela izinto ezibucayi ngesikhathi sokuthunyelwa noma ukugcinwa, zihlinzeka ngokunethezeka okuphezulu ngenkathi kunciphisa isisindo sokupakisha sonke. Lokhu kuguquka akuholeli nje kuphela ekongeni izindleko kodwa futhi kuhambisana nokwanda kwezintandokazi zabathengi zezixazululo ezinakekela imvelo.

Ngaphezu kwalokho, umkhakha wezinto zikagesi usebenzisa i-PU foam enwebekayo kumayunithi okuqandisa, lapho amakhono ayo okuvikela egcina khona izindleko zamandla ziphansi ngenkathi enweba impilo yento kagesi. Ama-foam asebenza njengesivikelo sokushisa esisebenzayo, esivimbela ukudluliselwa kokushisa futhi sigcine amazinga okushisa angaphakathi afunekayo, okwenza abe abalulekile ezintweni zikagesi ezisebenzisa amandla kahle.

Izinto Ezicatshangelwayo Nezinto Ezintsha Emvelweni

Ngokugxila okwandayo ekusimeni, ukukhiqizwa nokusetshenziswa kwe-PU foam enwebekayo kuye kwavela ngenxa yokukhathazeka ngemvelo. Ngokomlando, izinto zokusetshenziswa ze-PU foam ziveze ukukhathazeka ngenxa yokuncika kwazo ku-fossil fuel kanye nokukhishwa kwegesi ebamba ukushisa okuhambisanayo. Kodwa-ke, izinto ezintsha zakamuva ziholele ekuthuthukisweni kwama-polyol asekelwe ku-bio atholakala ezinsizeni ezivuselelekayo njengamafutha emifino, ngaleyo ndlela kunciphisa umthelela wekhabhoni ohlotshaniswa nokukhiqizwa kwe-foam yendabuko.

Ngaphezu kwalokho, abakhiqizi manje sebegxile ekuthuthukiseni ukuzinza kokuphela kokuphila kwama-PU foam. Ucwaningo luyaqhubeka ngobuchwepheshe bokuvuselela obuhlose ukubuyisa izingxenye ezibalulekile zama-PU foam, okwenza kube nendlela yomnotho ojikelezayo. Izinto ezintsha ezinjalo zinegalelo ekunciphiseni imfucuza nokukhuthaza ukusebenza kahle kwezinsizakusebenza, okuhambisana nemigomo yokuzinza yomhlaba wonke.

Imizamo yokunciphisa ukukhishwa okuyingozi ngesikhathi senqubo yokukhiqiza igwebu nayo iyanda. Kuvele izinto ezintsha ezibonisa ukuthi ama-volatile organic compounds (ama-VOC) ancipha kakhulu ngesikhathi sokukhiqiza nokusetshenziswa. Lokhu akugcini nje ngokuthuthukisa ukuphepha kwabasebenzi kodwa futhi kunciphisa umthelela wemvelo wokufakwa kwegwebu le-PU ezindaweni ezinabantu.

Izintshisekelo ezikhulayo emikhiqizweni enobungani nemvelo ziye zashukumisela izinkampani eziningi ukuba zamukele imikhuba yokukhiqiza enobungani nemvelo, okwadala ithuba lokuncintisana emakethe. Njengoba imithetho iqhubeka nokukhula ukuze ikhuthaze imikhuba esimeme, imboni ikulungele ukuzivumelanisa nezimo futhi isungule izinto ezintsha ngokushesha.

Izinselele kanye Nokucatshangelwa

Naphezu kwezinzuzo zayo eziphawulekayo, ukwamukelwa kwe-PU foam enwebekayo akunazo izinselele. Enye yezinto ezikhathazayo eziyinhloko kusewukuhlukahluka kwekhwalithi phakathi kwabaphakeli, okungaholela ekungahambelani ekusebenzeni. Abakhi nabakhiqizi kumele bahlale beqaphile, bekhetha abaphakeli abathembekile futhi bahlole ngokucophelela izinto zokwakha ukuqinisekisa ukuthi i-foam ihlangabezana nezindinganiso ezidingekayo zesicelo ngasinye esithile.

Ngaphezu kwalokho, yize i-PU foam enwebekayo ibonisa izakhiwo ezinhle kakhulu zokumelana nokushisa nomswakama, ukufakwa okungafanele kungaholela ekungasebenzi kahle okukhulu. Izikhala noma ukugcwalisa okungaphelele kungasusa izinzuzo ezihlosiwe zokufakwa kokushisa, okuholela ekulahlekelweni kwamandla nezinkinga ezingaba khona zesakhiwo. Kubalulekile ukuthi ochwepheshe embonini bathole ukuqeqeshwa okwanele ukuqinisekisa amasu okufaka afanele kanye nokunamathela eziqondisweni ezibekwe abakhiqizi.

Kukhona futhi ukukhathazeka mayelana nokukhishwa kwe-VOC, ikakhulukazi ngesikhathi nangemva kokufakwa. Imfundo mayelana nokuphathwa okuphephile, izindlela zokufakwa, kanye nezikhathi zokupholisa kubalulekile ukunciphisa izingozi zempilo ezingaba khona kubasebenzi nakubantu abahlala khona. Ukugcina umoya ohlanzekile owanele ngesikhathi sokufakwa nokusebenzisa izinto zokuzivikela kungasiza ekuphatheni izingozi futhi kuthuthukise ukuphepha.

Uma kukhulunywa ngemithethonqubo eshintshashintshayo, abakhiqizi kumele bahlale bevumelana nezimo. Iziqondiso eziqinile zemvelo zingadinga izinguquko ezinqubweni zokukhiqiza noma ekwakhiweni kwama-foam, okubangela ukusungula izinto ezintsha kanye nokutshalwa kwezimali kwezinye izindlela eziqhubekayo.

Isiphetho

Ukuvela kwe-PU foam enwebekayo kushintshe izimboni ezahlukene, kwanikeza izixazululo eziningi zezinselelo zokushisa ezihlala isikhathi eside. Amandla ayo okusebenza kokushisa, ubuqotho besakhiwo, kanye nokwenza ngokwezifiso kwenza kube ukukhetha okuhle kakhulu kwezicelo zokwakha, izimoto, ukupakisha, kanye nezinto zikagesi.

Nakuba izinselelo ziqhubeka, intuthuko eqhubekayo emikhubeni yokusimeme kwemvelo, ukuthuthukiswa kwezingxenye ezisekelwe ku-bio, kanye nokuzibophezela ekhwalithini kuvula indlela yekusasa eliqinile lobuchwepheshe be-PU foam. Njengoba amabhizinisi eqhubeka efuna izixazululo ezintsha, i-PU foam enwebekayo ikulungele ukudlala indima ebalulekile ekwakheni imikhuba eyonga amandla futhi enakekela imvelo kuyo yonke imboni.

Ngamafuphi, ukuqonda i-PU foam enwebekayo kuhlomisa ababambiqhaza kuyo yonke imikhakha ukuthi basebenzise izinzuzo zayo ngempumelelo, babhekane nezinselele zokushisa eziphuthumayo ngenkathi beqhubekisela phambili imigomo yokuzinza. Ukuthuthuka kwayo okuqhubekayo kukhuluma ngamathuba okusungula izinto ezintsha lapho sibhekene nesimo sebhizinisi esiyinkimbinkimbi sanamuhla, okuphakamisa ukuthi ikusasa lokushisa lingatholakala kakhulu ku-foam.