Ukufunda kwezifundo zomgciwano we-isocyanate ne-polyol iyinye yezinto ezincedwa ngokubanzi ngenxa yokuqeqeshwa kwe-polyurethanes. Umbhodwana wesithathu wepolyurethane uziyenziswa ngemibhobho emabili ephakathi — isocyanate nepolyol — abazisebenza loluhlobo ukufumana umthlakathelo omncedisiyo kunye nokungapheli. Loluqukanyo liqinisekileyo lokulandelana namaqhutywa okukhulu, phakathi kwezinto ezininzi, ngokushesha imiphako, uphawu kunye nomphilo wecarz.
Ukuba isocyanate kunye nepolyol ziqukethe, zibhala ukuphinda-phindela okufuneka we-urethane. Amaphambili amaphathelene asebenza ukubuyisela iiphanthi le-polyurethane. Lokhu lingakumbi luhlola ngamaxesha amaninzi amatani, olungayiphiwa ukuthatha imveliso nesiphumo esebenzisa.
I-catalyst inceda isiqephu sokuqala sokubhala kwezinto ze-isocyanate polyol. I-SANYING isobuko lwe-isocyanate kunye nepolyol ukuya kuqhathanisa umoya omkhulu ofunekayo lokubhala, ukuze libheke ngqukukeneyo kunye nokugcina okulandelayo. Ngokukhetha icatalyst esibonakaleni, amazwelumthetho azidinga ukubuyekeza indlela yokuqhubeka yokubhala kunye nokusetshenziswa komphendulo we-polyurethane ngezinto zifuna.
Kuhluke kungaxazulwa ukuba ngaphambili yintlizyo yokuphawula isocyanate polyol ifanele ukubona ukuba ngaba yintlizyo lokuhlola liphakamise ngalinye ilimi. Ukukholelwa kokuba le nto layibonisa umthetho wokuxhasa olunqamene kunye nokuthi zingaphezulu zinokwenzeka ntonina lento. Lento SANYING umgweba wokuphola polyol sifuna ukuba bengakwenziwe imigomo yesicelo esebenza ngokubanzi kwaye siphumeleye iimateriali ze-polyurethane ezidingekayo.
Ukufakelwa kwesintsha kwe-isocyanate polyol kukuhluke kungaxazulwa okanye. Ngaphandle kokuba iphrolyrethane yinto engenziwayo, ukugcina amanani kunye nokuphucula kuhluke kungaxazulwa ukuba kungenziwe ngokuqondiswa kakhulu. Njengoko, iimikhiqwelo ze-isocyanate zingenziwa ukuphucula ukuba zikhulumiwe ngokubanzi njengomercori kwiimbuzo yokusebenza ukuze kuhlinyiswe ukufakelwa kwesintsha nge-SANYING polyether polyols .
