Ọdịiche dị n'etiti MDI na TDI

Ma TDI na MDI bụ ụdị ihe eji eme ihe na mmepụta polyurethane, ha nwere ike dochie ibe ha ruo n'ókè ụfọdụ, ma ọ dịghị obere ọdịiche dị n'etiti TDI na MDI n'ihe gbasara nhazi, arụmọrụ na iji subdivision.

1. Ọdịnaya isocyanate nke TDI dị elu karịa nke MDI, na ụda ụfụfụ kwa otu unit ka ukwuu.Aha zuru oke nke TDI bụ toluene diisocyanate, nke nwere otu isocyanate abụọ na otu mgbanaka benzene, na ọdịnaya nke otu isocyanate bụ 48.3%;aha zuru oke nke MDI bụ diphenylmethane diisocyanate, nke nwere mgbanaka benzene abụọ na ọdịnaya nke otu isocyanate bụ 33.6%;N'ozuzu, ka ọdịnaya isocyanate dị elu, ka ọnụ ọgụgụ ahụ na-afụ ụfụ ka ukwuu, ya mere e jiri ya tụnyere abụọ ahụ, TDI unit mass foaming volume is ibu.

2. MDI adịchaghị egbu egbu, ebe TDI na-egbu egbu nke ukwuu.MDI nwere obere ikuku ikuku, ọ dịghị mfe ịgbagha, enweghị isi na-akpasu iwe, ọ dịghịkwa egbu egbu nye ụmụ mmadụ, ọ nweghịkwa ihe pụrụ iche chọrọ maka njem;TDI nwere nnukwu uzuoku nrụgide, ọ dị mfe ịgbagha, ma nwee isi ísì siri ike.Enwere ihe siri ike chọrọ.

3. Ọsọ ịka nká nke usoro MDI dị ngwa ngwa.E jiri ya tụnyere TDI, usoro MDI nwere ngwa ngwa ọgwụgwọ ọsọ, obere ịkpụzi okirikiri na ezigbo ụfụfụ.Dịka ọmụmaatụ, ụfụfụ dabeere na TDI n'ozuzu chọrọ usoro ọgwụgwọ 12-24h iji nweta arụmọrụ kachasị mma, ebe usoro MDI chọrọ naanị 1h iji nweta arụmọrụ kacha mma.95% ntozu oke.

4. MDI dị mfe ịmepụta ngwaahịa ụfụfụ dị iche iche na njupụta dị elu.Site n'ịgbanwe oke nke ihe mejupụtara ya, ọ nwere ike ịmepụta ngwaahịa ndị nwere oke siri ike.

5. The downstream nke polymerized MDI bụ tumadi na-eji maka mmepụta nke isiike ụfụfụ, nke na-eji na-ewu ike ịzọpụta,friji friza, wdg. Ihe owuwu zuru ụwa ọnụ bụ ihe dịka 35% nke oriri MDI polymerized, na friji na friza na-akpata ihe dịka 20% nke oriri MDI polymerized;MDI dị ọcha bụ nke a na-eji emepụta pulp,akpụkpọ ụkwụ ọbụ ụkwụ, elastomers, wdg, na-eji akpụkpọ anụ sịntetik, akpụkpọ ụkwụ, ụgbọ ala, wdg;ebe a na-ejikarị TDI eme ihe na ụfụfụ dị nro.A na-eme atụmatụ na ihe dịka 80% nke TDI ụwa na-eji na-emepụta ụfụfụ dị nro, nke a na-eji na ngwá ụlọ, ụgbọala na ubi ndị ọzọ.