Iimveliso zePolyurethane ezithambileyo zamagwebu ikakhulu zibandakanya ibhloko, i-sponji eqhubekayo, i-foam ephezulu yokuqina (HR), igwebu lesikhumba esizenzelayo, ugwebu lokuqina olucothayo, igwebu le-microporous kunye ne-semi-rigid ugwebu olufunxa amandla.Olu hlobo logwebu lusathatha malunga ne-50% yemveliso ye-polyurethane iyonke.Kukho iintlobo ngeentlobo zeemveliso kwaye ububanzi besicelo buhlala busanda, kwaye baye babandakanyeka kwiinkalo ezahlukeneyo zoqoqosho lwesizwe: izixhobo zasekhaya, iimoto, ukuphuculwa kwekhaya, ifenitshala, oololiwe, iinqanawa, i-aerospace kunye nezinye iindawo ezininzi.Ukusukela oko kwathi kwafika ugwebu oluthambileyo lwePU ngeminyaka yee-1950, ngakumbi emva kokungena kwinkulungwane yama-21, itekhnoloji, iindidi, kunye nemveliso yemveliso zonke zenze imitsi.Amagqabantshintshi aquka: i-PU ethambileyo ye-pu, eyile iimveliso zepolyurethane eluhlaza;ixabiso eliphantsi le-VOC i-PU igwebu elithambileyo;i-atomization ephantsi ye-PU i-foam ethambileyo;amanzi agcweleyo i-PU igwebu elithambileyo;Uthotho olupheleleyo lwe-MDI ugwebu oluthambileyo;i-flame retardant, umsi ophantsi, i-MDI epheleleyo yochungechunge lwe-foam;Izongezo ezitsha ezifana ne-polymer catalysts esebenzayo, i-stabilizers, i-flame retardants kunye ne-antioxidants;iipolyols ezine-unsaturation ephantsi kunye nomxholo ophantsi we-monoalcohol;Uxinzelelo lwe-Ultra-low density PU flexible foam eneempawu ezibalaseleyo zomzimba;i-resonance frequency ephantsi, i-Low-transfer PU soft foam;i-polycarbonate diol, i-polyε-caprolactone polyol, i-polybutadiene diol, i-polytetrahydrofuran kunye nezinye ii-polyols ezikhethekileyo;Ulwelo lwe-CO2 iteknoloji yogwebu, iteknoloji yoxinzelelo olugwebu olubi, njl njl. Ngamafutshane, ukuvela kweentlobo ezintsha kunye nobuchwepheshe obutsha bukhuthaze uphuhliso olungakumbi lwe-PU ethambileyo yogwebu.
Umgaqo onamagwebu
Ukuze kuhlanganiswe i-PU i-foam ethambileyo efanelekileyo ehlangabezana neemfuno, kuyafuneka ukuba uqonde umgaqo wokusabela kweekhemikhali wenkqubo ye-foam ukuze ukhethe eyona nto iphambili kunye neyokuncedisa imathiriyeli ekrwada kunye neenkqubo zokuvelisa.Uphuhliso loshishino lwe-polyurethane alusekho inqanaba lokuxelisa, kodwa luqondwa ngokusebenzisa i-raw material structure kunye nenkqubo yokudibanisa ngokweemfuno zokusebenza kwemveliso yokugqibela.I-Polyurethane foam ithatha inxaxheba ekutshintsheni kweekhemikhali ngexesha lenkqubo yokudibanisa, kwaye izinto ezichaphazela iimpawu zesakhiwo se-foam ziyinkimbinkimbi, azibandakanyi nje ukusabela kweekhemikhali ze-isocyanate, i-polyether (ester) yotywala kunye namanzi, kodwa kunye nekhemikhali ye-colloid ye-foam.Ukusabela kweekhemikhali kubandakanya ukwandiswa kwekhonkco, ukugwebu kunye nokudityaniswa.Kwakhona kuchaphazela isakhiwo, umsebenzi kunye nobunzima bemolekyuli yezinto ezibandakanyekayo ekuphenduleni.Ukusabela ngokubanzi kwi-synthesis ye-polyurethane foam kunokubonakaliswa ngale fomyula ilandelayo:
Ixesha lokuposa: Sep-06-2022