Kokubili i-TDI ne-MDI ziwuhlobo lwempahla eluhlaza ekukhiqizeni i-polyurethane, futhi zingashintshana ngokwezinga elithile, kodwa awukho umehluko omncane phakathi kwe-TDI ne-MDI mayelana nesakhiwo, ukusebenza kanye nokusetshenziswa kweziqephu.
1. Okuqukethwe kwe-isocyanate kwe-TDI kungaphezulu kwalokho kwe-MDI, futhi ivolumu egcwele ugwebu ngeyunithi yesisindo sikhulu.Igama eliphelele le-TDI i-toluene diisocyanate, enamaqembu amabili e-isocyanate eringini eyodwa ye-benzene, futhi okuqukethwe kweqembu le-isocyanate kungu-48.3%;igama eliphelele le-MDI yi-diphenylmethane diisocyanate, enezindandatho ezimbili ze-benzene futhi okuqukethwe kweqembu le-isocyanate kungu-33.6%;Ngokuvamile, ukuphakama kokuqukethwe kwe-isocyanate, ivolumu yeyunithi egwebuzelayo iba nkulu, ngakho-ke uma kuqhathaniswa nalokhu okubili, umthamo we-TDI unit mass foaming uba mkhulu.
2. I-MDI ayinabo ubuthi obuncane, kuyilapho i-TDI inobuthi obukhulu.I-MDI inomfutho we-vapor ophansi, akulula ukuvuthwa, ayinalo iphunga elicasulayo, futhi ayinabo ubuthi obuncane kubantu, futhi ayinazo izidingo ezikhethekile zokuhamba;I-TDI inomfutho we-vapor ophezulu, kulula ukuguquguquka, futhi inephunga elimnandi elinamandla.Kunezidingo eziqinile.
3. Isivinini sokuguga sohlelo lwe-MDI siyashesha.Uma kuqhathaniswa ne-TDI, uhlelo lwe-MDI lunesivinini sokuphulukisa ngokushesha, umjikelezo omfushane wokubumba nokusebenza okuhle kwegwebu.Isibonelo, igwebu elisekelwe ku-TDI ngokuvamile lidinga inqubo yokuphulukisa yamahora angu-12-24 ukuze kuzuzwe ukusebenza okungcono kakhulu, kuyilapho isistimu ye-MDI idinga kuphela i-1h ukuze ifinyelele ukusebenza okuhle kakhulu.95% ukuvuthwa.
4. I-MDI kulula ukuthuthukisa imikhiqizo yegwebu ehlukahlukene enobuningi obuhlobene.Ngokushintsha ingxenye yezingxenye, ingakhiqiza imikhiqizo enobunzima obuningi.
5. Umfula we-MDI owenziwe nge-polymerized ikakhulukazi usetshenziselwa ukukhiqizwa kwegwebu eliqinile, elisetshenziselwa ukwakha ukonga amandla,isiqandisi amafriji, njll. Ukwakhiwa komhlaba wonke kubala cishe u-35% wokusetshenziswa kwe-MDI ye-polymerized, futhi isiqandisi nesiqandisi kubala cishe u-20% wokusetshenziswa kwe-MDI ye-polymerized;I-MDI ehlanzekile ikakhulukazi Isetshenziselwa ukukhiqiza i-pulp,isicathulo ematheni, ama-elastomers, njll., futhi isetshenziselwa isikhumba sokwenziwa, ukwenza izicathulo, izimoto, njll.;kuyilapho umfula ongezansi we-TDI usetshenziswa kakhulu kugwebu elithambile.Kulinganiselwa ukuthi cishe amaphesenti angama-80 e-TDI emhlabeni asetshenziselwa ukukhiqiza igwebu elithambile, elisetshenziswa kwiFenisha, ezimotweni nakweminye imikhakha.
Isikhathi sokuthumela: Jun-29-2022