Kwimveliso ye-polyurethane foam, ukufikelela kwisakhiwo se-foam esifunekayo, uxinano, kunye namandla oomatshini kuxhomekeke kwizinto ezininzi - phakathi kwazo,ubushushu bezinto ezibonakalayokwayeubushushu obugciniwezezona zimbini zibalulekileyo. Ukuqonda indlela ezi parameters zobushushu ezichaphazela ngayoimpendulo ye-polyurethane foamkubalulekile ekugcineni umgangatho, imveliso, kunye nokusebenza kakuhle kweendleko.
1. Ukubaluleka koLawulo loBushushu kwiPolyurethane Foaming
Iinkqubo yokwenza i-polyurethane foamibandakanya uthotho oluntsonkothileyo lweempendulo zeekhemikhali ezingaqhelekanga phakathiiipolyol, i-isocyanates, amanzi, kunyeiikhatalyst ze-polyurethaneEzi mpendulo zivelisa ubushushu, igesi ye-CO₂, kwaye ekugqibeleni zenze isakhiwo sefoam yeselula.
Zombiniubushushu bezinto ezibonakalayo(ubushushu be-polyol kunye ne-isocyanate ngaphambi kokuxuba) kunyeubushushu obugciniwe(indawo engqongileyo ngexesha lokwenziwa kwegwebu kunye nokuphiliswa) ichaphazela ngokuthe ngqo izinga lokusabela, ulwakhiwo lweseli, ukunyuka kwegwebu, kunye neempawu zokuphiliswa.
2. Impembelelo yoBushushu beZinto kwiNdlela esebenza ngayo iFoam
Ukugcina indlela efanelekileyoubushushu bezinto ezibonakalayokubalulekile ngaphambi kokuba kuxutywe izithako.
- Ubushushu obuphantsi bezinto (<18°C): Xa i-polyol okanye i-isocyanate ibanda kakhulu, impendulo iba buthathaka. I-foam inokunyuka kancinci, ibonise iiseli ezingalinganiyo, okanye ide iwe ngenxa yempendulo engaphelelanga. Izinto ezibandayo nazo ziyandisa i-viscosity, nto leyo ebangela ukuxubana okubi kunye nokungahambelani kakuhle kwe-foam.
- Ubushushu obuphezulu bezinto (>25°C): Ukufudumala okugqithisileyo kuyakhawulezisa ukusabela ngokugqithisileyo, kunciphisa ixesha lekhrimu kunye nexesha lokunyuka. Oku kunokukhokelela kwizakhiwo zeeseli ezirhabaxa, iziphene zomphezulu, kunye nemingxunya yoxinzelelo lwangaphakathi kwi-foam.
Uninziiinkqubo ze-polyurethane foam, okucetyiswayoubushushu bezinto ezibonakalayouluhlu lu20–25°Cukuqinisekisa ukuxubana okufanayo, izinga elifanelekileyo lokuphendula, kunye nokunyuka okuzinzileyo kwefoam.
3. Impembelelo yoBushushu obuPhakathi ekuFumeni nasekuPhiliseni
Iubushushu obugciniwekwicandelo lemveliso nako kudlala indima ebalulekileyoumgangatho wefoam ye-polyurethane.
- Ubushushu obuphantsi (<15°C): Ukulahleka kobushushu kwindawo engqongileyo kucothisa ukusabela kwegwebu, kwandisa amaxesha okungabi nazithintelo kunye nokudilizwa. Igwebu lisenokubonakala lixinene kwaye linzima ngenxa yokwanda kwe-CO₂ okunciphileyo.
- Ubushushu obuphezulu (>30°C): Ubushushu obugqithisileyo bunokubangela i-gelling ngaphambi kwexesha, ukwanda okungaphelelanga, kunye neziphene ze-open-cell. Kwi-spray polyurethane foam (SPF), amaqondo obushushu aphezulu anokubangela ukunamathelana okungalinganiyo kunye nokuzinza okungalunganga kobukhulu.
Isitaliubushushu obuphakathi kwe-20–25°Ckunye nokufuma okuphantsi kuqinisekisa ukubaimpendulo ye-polyurethane foamiqhubeka ngokufanayo kwaye ifoam yokugqibela ibonisa uxinano oluhambelanayo kunye nomxholo weeseli ezivaliweyo.
4. Ibhalansi yoBushushu kunye noKhetho lweCatalyst
Ukutshintshatshintsha kobushushu akuchaphazeli nje kuphela isantya sokuphendula kweekhemikhali kodwa kukwachaphazela nokusebenzai-polyurethane catalystIi-catalysts ezifana nee-tertiary amines kunye nee-organometallic compounds zilawula ibhalansi phakathiimpendulo evuthuzayo(amanzi–isocyanate) kunyeimpendulo ye-gelling(i-polyol–isocyanate).
Kumaqondo obushushu aphantsi, impendulo iyehla, kwayei-catalyst ye-amine esebenzayo kakhulu(njengeI-MXC-A1okanye i-MXC-5) inokubuyisela ukwenziwa kwe-reactivity ephantsi.
Kumaqondo obushushu aphezulu,isikhuthazi sesenzo esilinganiselayo okanye esilibazisekileyo(njengeI-MXC-B20okanye iMXC-TMA) inokunceda ukugcina ukuphakama okufanayo kunye nokunciphisa iziphene zomphezulu.
Efanelekileyoulawulo lobushushu oludityaniswe ne-catalyst ye-polyurethane efanelekileyoiqinisekisa ukuba iipropati zefoam zihlala zifana naphantsi kweemeko ezahlukeneyo zendalo.
5. Iingcebiso Ezisebenzayo Zokulawula Ubushushu Kwimveliso Ye-PU Foam
- Izinto zokushisa umlilokuluhlu olufanelekileyo (20–25°C) ngaphambi kokuba uxube.
- Gcina ubushushu begumbi buzinzilekwindawo ekhupha amagwebu ngokulawula imozulu okanye ubushushu.
- Ziphephe iinguqu ezikhawulezayo zobushushuezibangela uxinano olungalinganiyo lwefoam.
- Jonga iiprofayili zokusabelarhoqo ukuze ulungise umthamo we-catalyst xa amaqondo obushushu okusingqongileyo etshintsha.
- Qinisekisa ukuba igcinwe kakuhleizinto ezikrwada — ingakumbi ii-isocyanates — ukuthintela ukufunxwa komswakama kunye notshintsho lwe-viscosity.
6. Isiphelo
Zombiniubushushu bezinto ezibonakalayokwayeubushushu obugciniweziiparameter ezibalulekileyo ezinefuthei-polyurethane foamumgangatho. Ulawulo olufanelekileyo lobushushu luqinisekisa uzinzo lwempendulo yeekhemikhali, luphucula ukusebenza kakuhle kwe-catalyst, kwaye luvelisa amagwebu anoxinano olufanayo, ulwakhiwo lweseli olufanayo, kunye neempawu zoomatshini eziphezulu.
At Izixhobo Ezintsha zeMingxu, sinikezela uluhlu olubanzi lweiikhatalyst ze-polyurethaneilungiselelwe iimeko ezahlukeneyo zobushushu kunye neefomyula zefoam. Nokuba uyayivelisaamagwebu e-polyurethane aqinileyo, aguquguqukayo, okanye atshizwayo, ii-catalysts zethu ezingenayo i-emission, ezingenavumba liphantsi zibonelela ngokusebenza okuthembekileyo kwaye zikunceda ugcine umgangatho wemveliso uphezulu phantsi kwayo nayiphi na imeko yemveliso.
Ixesha leposi: Oktobha-15-2025