Zombini i-TDI kunye ne-MDI luhlobo lwemathiriyeli ekrwada kwimveliso ye-polyurethane, kwaye banokutshintshana ukuya kwinqanaba elithile, kodwa akukho mahluko omncinci phakathi kwe-TDI kunye ne-MDI ngokwesakhiwo, ukusebenza kunye nokusetyenziswa kokwahlulahlula.
1. Umxholo we-isocyanate we-TDI uphezulu kune-MDI, kwaye umthamo we-foaming ngeyunithi yobunzima mkhulu.Igama elipheleleyo le-TDI yi-toluene diisocyanate, enamaqela amabini e-isocyanate kwiringi ye-benzene enye, kwaye umxholo weqela le-isocyanate yi-48.3%;igama elipheleleyo le-MDI yi-diphenylmethane diisocyanate, enezangqa ezimbini zebenzene kwaye umxholo weqela le-isocyanate yi-33.6%;Ngokubanzi, okukhona isiqulatho se-isocyanate siphezulu, kokukhona umthamo weyunithi ugwebu bukhulu, ngoko xa kuthelekiswa nezi zimbini, iyunithi ye-TDI yobunzima bevolumu yogwebu inkulu.
2. I-MDI ayinayo ityhefu encinci, ngelixa i-TDI inetyhefu kakhulu.I-MDI inoxinzelelo oluphantsi lomphunga, akulula ukuguquguquka, ayinalo ivumba elicaphukisayo, kwaye ayinayo ityhefu ebantwini, kwaye ayinayo imfuneko ekhethekileyo yokuthutha;I-TDI inoxinzelelo oluphezulu lomphunga, kulula ukuguquguquka, kwaye inevumba elibukhali elibukhali.Kukho iimfuno ezingqongqo.
3. Isantya sokuguga senkqubo ye-MDI sikhawuleza.Xa kuthelekiswa ne-TDI, inkqubo ye-MDI inesantya sokunyanga ngokukhawuleza, umjikelo omfutshane wokubumba kunye nokusebenza kakuhle kwamagwebu.Ngokomzekelo, i-foam esekelwe kwi-TDI ngokubanzi idinga inkqubo yokunyanga i-12-24h ukufezekisa ukusebenza kakuhle, ngelixa inkqubo ye-MDI idinga kuphela i-1h ukufezekisa ukusebenza kakuhle.Ukuvuthwa ngama-95%.
4. I-MDI kulula ukuphuhlisa iimveliso ze-foam ezihlukeneyo kunye noxinano oluphezulu.Ngokutshintsha umlinganiselo wamacandelo, inokuvelisa iimveliso ezinobunzima obuninzi.
5. Umzantsi we-MDI we-polymerized usetyenziselwa ukuveliswa kwe-foam eqinile, esetyenziselwa ukwakha ukugcinwa kwamandla,ifriji iifriji, njl njl. Ulwakhiwo lwehlabathi lubalelwa malunga ne-35% yokusetyenziswa kwe-MDI yepolymerized, kunye ne-akhawunti yefriji kunye nesikhenkcisi malunga ne-20% yokusetyenziswa kwe-MDI ye-polymerized;I-MDI esulungekileyo ubukhulu becala Isetyenziselwa ukuvelisa ipulp,isihlangu ii soli, iielastomers, njl., kwaye isetyenziselwa ukwenziwa kwesikhumba, ukwenza izihlangu, iimoto, njl.;ngelixa ezantsi kwe-TDI isetyenziswa ikakhulu kwi-foam ethambileyo.Kuqikelelwa ukuba malunga ne-80% ye-TDI yehlabathi isetyenziselwa ukuvelisa ugwebu oluthambileyo, olusetyenziswa kwiFenitshala, iimoto kunye nezinye iindawo.
Ixesha lokuposa: Jun-29-2022