Ose maviri TDI neMDI imhando yezvakagadzirwa mukugadzirwa kwepolyurethane, uye anogona kutsiva mumwe kune imwe nhanho, asi hapana misiyano midiki pakati peTDI neMDI maererano nechimiro, kuita uye kupatsanura kushandiswa.
1. Iyo isocyanate yemukati yeTDI yakakwira kupfuura yeMDI, uye vhoriyamu inopupuma payuniti misa yakakura.Zita rakazara reTDI nderekuti toluene diisocyanate, ine zvikwata zviviri zve isocyanate pane imwe benzene ring, uye isocyanate group content i48.3%;zita rakazara reMDI idiphenylmethane diisocyanate, ine mhete dzebenzene mbiri uye isocyanate group content i33.6%;Kazhinji, iyo yakakwira iyo isocyanate yemukati, iyo yakakura iyo unit inopupa vhoriyamu, saka kana ichienzaniswa neaya maviri, iyo TDI unit mass foaming volume yakakura.
2. MDI haina chepfu shoma, nepo TDI ine chepfu yakanyanya.MDI ine low vapor pressure, haisi nyore kuvhuvhuta, haina hwema hunogumbura, uye haina chepfu kuvanhu, uye haina zvakakosha zvekufambisa;TDI ine high vapor pressure, iri nyore kunyungudika, uye ine kunhuhwirira kwakasimba.Pane zvinodiwa zvakasimba.
3. Kukurumidza kukwegura kweMDI system inokurumidza.Kuenzaniswa neTDI, MDI system ine kukurumidza kurapa kukurumidza, kupfupika kwekuumbwa kutenderera uye kuita kwakanaka kwefuro.Semuenzaniso, TDI-based foam inowanzoda 12-24h yekurapa maitiro kuti iite yakanakisa kuita, nepo MDI system inongoda 1h kuti iite yakanakisa kuita.95% kukura.
4. MDI iri nyore kugadzira zvigadzirwa zvakasiyana-siyana zvefuro zvine hukama hwepamusoro.Nekushandura chikamu chezvikamu, inogona kugadzira zvigadzirwa zvine huwandu hwakawanda hwekuoma.
5. Iyo yakadzika yepolymerized MDI inonyanya kushandiswa kugadzira furo rakaomarara, rinoshandiswa mukuvaka kuchengetedza simba,firiji mafiriza, etc. Kuvaka kwepasirese kunotora 35% yepolymerized MDI kushandiswa, uye firiji nefiriza inotora 20% yepolymerized MDI kushandiswa;yakachena MDI kunyanya Inoshandiswa kugadzira pulp,shoe soles, elastomers, nezvimwewo, uye inoshandiswa mukugadzirwa kwematehwe, kugadzira shangu, mota, nezvimwewo;nepo kudzika kweTDI kuchinyanya kushandiswa mufuro rakapfava.Zvinofungidzirwa kuti chikamu che80% cheTDI yepasi rose inoshandiswa kugadzira furo rakapfava, iro rinoshandiswa muFenicha, mota nemimwe minda.
Nguva yekutumira: Jun-29-2022