Isebenzisa kwiqhutywa lwe-polyurethane (PMDI isocyanate). I-Polyurethane yichibhalo eliphakathi lokugcina okanye lokulula ngokwesixa somdlalo wesixa. Isicathulo sokuqala sokusebenza sonye i-PMDI isocyanate, iyinye yamagcinelo amaphumela ukuba i-Polyurethane foam. Ngokushesha lefoam ibizwa njengeyo engazenza imibuzo yokuhlukeka kunye nokuba ngaphandle kwegcino idipropilayini
Ngokusho kwesintu esingakade, PMDI usebenziswe ngeminyaka eminingi ezidingekayo. Ungavulwa ngaphandle kokuthiwa imiphumulo noma amathetha, izicatulo zomoto namanye amagama olunqamene. Ukuba apho akwazi ukusetyenziswa, PMDI usetyenziswa njengeyinto elithetha kodwa lizizo litshintshwa ngokuphelele ifomu yesi polyurethane esikhulu
Ubuhle bezisezantsi benza imimihla yokugcina nokugcina kwePMDI isocyanate. Ngokusho kukusekelayo, yintlanto engapheleleyo kunye nokuziphatha izinkinga eziphumeleyo nokuhlala ukubanjwa okanye ukukhombisa umoya owenqanawa ukuba ayibonisiwe ngokuqinisekiswayo. Abasezantsi babedlulelwanga iindlebe, amagijima namasafeti yokuhlala ukuba abangakho ithuthuko benzil isosianat
Ngokushesha kwezinyathelo ezininzi zokusebenza kwe-PMDI isocianate, kufuneka siyazi ukuba ngokwenzeka imiphumela yayo kwisehlobo. Ukuphila nokusebenza kwe-PMDI kungabizwa amagama amahle emazibeni angaphandle komhlaba okungena umoya ofanekiso nokuthi ubuyelekileyo obudala. Kufuneka izicwangciso ezingasemva ngeendlala zikwenze iindawo zasekompani ukuvumela ukuthi akukho imiphumela yokubuyelekiswa kwisehlobo yokusebenza kwe-PMDI.
Isimo esingaphezulu esintsha sokugcina nokusetyenziswa kwento omtsha we-PMDI isocianate. Izikompuni ziyavamilela amaninzi amasha we-PMDI apha ongqondi kakhulu kunye nokuhlala ekunyeleyo. Izindlela ezintsha zazingena ukuba izikompuni zityipha izinto ezikhoyo ngokuhlukeka nokusetshenziswa kwisehlobo.
