Isikhumba se-polyurethane synthetic siyinto entsha enezinjongo eziningi ehlanganisiwe eye yathuthuka ngokushesha eminyakeni yamuva.Yenziwe ngesisekelo sokumboza i-polyurethane slurry enesakhiwo seseli esivulekile esisekelweni esiphansi sezindwangu zendwangu nezingezona ezilukiwe.Kodwa-ke, iningi lama-polyurethanes asetshenziswayo asekelwe ku-solvent, futhi ukulimala kwemvelo nomzimba womuntu okubangelwa izinsalela ze-DMF kanye nokushintshashintsha kwe-VOC ohlelweni lokukhiqiza sekuphenduke ibhodlela lobuchwepheshe elivimbela ukuthuthukiswa kwemboni.Njengamanje, i-polyurethane esekwe emanzini iyindawo efanelekile ye-polyurethane esekelwe ku-solvent, kodwa ukukhubazeka kwayo kungukuqukethwe okuqinile okuphansi, izakhiwo ezingezinhle zomzimba, ukunamathela kalula endaweni enamathelayo, ukumelana kabi kwe-hydrolysis, ukuvuthwa kancane kwenqubo yokukhiqiza, nokukhiqizwa okuphansi. ukusebenza kahle.
Ngokusekelwe emqondweni "wokuvikela okuluhlaza kanye nemvelo" kanye nokwenza ngcono inani elengeziwe lemikhiqizo, iphrojekthi isungule isethi yohlelo olusha lobuchwepheshe lokukhiqiza i-polyurethane ephezulu eqinile nenamanzi kanye nesikhumba sokwenziwa kwemvelo esingangena esikhundleni se-solvent polyurethane.I-polyurethane yamanzi eqinile ephezulu eklanywe futhi yathuthukiswa inganciphisa izinsalela ze-DMF kanye nokuguquguquka kwe-VOC emthonjeni wokuthuthukiswa ngenkathi kuthuthukisa ukusebenza kokumboza.Ngesikhathi esifanayo, ngenxa yokuthi ifilimu iqukethe inani elikhulu lamaqembu e-hydrophilic kanye nezakhiwo ezincane, ukugqoka kunomoya omuhle nomswakama wokungena, futhi umkhiqizo wangempela wokukhiqiza.Ngaphezu kwalokho, i-polyurethane ilungiswa ngezinto ze-nano ukuze kuthuthukiswe imikhiqizo yesikhumba eyenziwe nge-polyurethane esebenza kahle kakhulu efanelekile ukufunwa yimakethe, ukuze kuthuthukiswe inani elengeziwe lemikhiqizo nokuqinisa ukuncintisana kwemakethe.
Okuqukethwe kocwaningo oluyinhloko:
(1) Ukulungiselela ubuchwepheshe bokuqukethwe okuphezulu okuqinile okune-polyurethane emanzini.Ngokwemodeli yezibalo yokuminyana kwenqwaba yezinto eziyindilinga, kulungiselelwa okuqukethwe okuqinile okuphezulu kwe-polyurethane enama-aqueous enobukhulu bezinhlayiyana ezinobukhulu obuhlukahlukene.Ukusabalalisa usayizi wezinhlayiyana ezinezinhlangothi eziningi kungathuthukisa okuqukethwe okuqinile kwe-lotion ngaphandle kokwandisa i-viscosity ephezulu kakhulu.Inkinga ye-viscosity ephezulu kanye nokuqina okuphansi ekukhiqizeni okuqukethwe okuphezulu kwe-polyurethane yamanzi iyaxazululwa.Okuqukethwe okuqinile ngu-> 50%, i-angle yokuxhumana yefilimu ingu-101.1 °, futhi ukumelana kwamanzi nokumelana ne-hydrolysis kuyathuthukiswa.
(2) Ubuchwepheshe bokukhiqiza be-polyurethane foamed bass emanzini.Ngokusekelwe kokuqukethwe okuphezulu okuqinile okune-aqueous polyurethane, inhlanganisela yezindlela zokukhiya amagwebu ngokomzimba namakhemikhali ziyakhethwa ukuze kwakhiwe amabhasi e-polyurethane asekelwe emanzini aneseli elilungisekayo.Umkhiqizo ushubile, uminyene futhi uthambile, unokumunca umswakama omuhle kanye nokungeneka, ufinyelela ukukhishwa kwe-VOC engu-zero ne-DMF ohlelweni lokukhiqiza, unciphisa ubunzima bokuphela kokwelashwa kanye nokulondoloza izindleko zokubuyiselwa kwe-solvent nokwelashwa esikhathini esizayo.
(3) Ukulungiselela ubuchwepheshe be-polyurethane esebenzayo emanzini.I-polyurethane yasemanzini esebenza ngezindlela eziningi ene-super hydrophobicity, ukumelana nokugqokwa kanye nezindawo ezilwa nokuqina ilungiswe kusetshenziswa indlela yokusabela ngokuchofoza kwe-"mercapto monoene", i-nanotechnology kanye nobuchwepheshe bokuphulukisa ukukhanya.Ingasetshenziswa esikhumbeni sokwenziwa, indwangu yendwangu, ukwahlukanisa uwoyela-amanzi, ukuvikela i-electromagnetic kanye neminye imikhakha.
Isikhathi sokuthumela: Sep-13-2022