Iyini impahla ye-PU?
Incazelo eyisisekelo yezinto ze-PU
I-PU imele i-Polyurethane, i-polymer material esetshenziswa kabanzi ezimbonini ezihlukahlukene. I-polyurethane ikhiqizwa ukusabela kwamakhemikhali phakathi kwe-isocyanate ne-polyol, futhi inohlu olubanzi lwezinto ezibonakalayo namakhemikhali. Ngenxa yokuthi i-PU ingaba nezakhiwo zayo ezilungiswe ngokushintsha ukwakheka kwayo, isetshenziswa ezinhlobonhlobo zezinhlelo zokusebenza, kusukela ekugqokeni kuya ezintweni zokwakha.
Ukuhlukaniswa kanye Nezakhiwo ze-PU
I-polyurethane ingahlukaniswa ngezinhlobo ezihlukahlukene, okuhlanganisa amagwebu aqinile, amagwebu aguquguqukayo, ama-elastomers, ama-coatings nama-adhesives. Amagwebu aqinile avame ukusetshenziselwa ukufaka amaphaneli nokwakha, kuyilapho amagwebu aguquguqukayo asetshenziswa kakhulu ifenisha, izihlalo zemoto kanye nomatilasi. Ama-elastomer, ngakolunye uhlangothi, akhombisa ukunwebeka okufana nenjoloba futhi asetshenziselwa amasoli ezicathulo, amathayi nokunye. Ngenxa yokunwebeka kwayo okuhle, ukumelana nokuhuzuka, ukumelana nowoyela nokumelana nokuguga, izinto ze-PU zibonisa ukusebenza okuhle kakhulu ezinhlelweni ezihlukene.
Ukusetshenziswa kwe-PU ezimbonini ezahlukahlukene
I-polyurethane inezinhlobo eziningi zokusetshenziswa emikhakheni ehlukene. Isibonelo, embonini yendwangu, i-PU ivame ukusetshenziswa ekukhiqizeni isikhumba sokwenziwa, esinokwakheka okufana nesikhumba kodwa ishibhile futhi kulula ukusinakekela. Embonini yezokwakha, igwebu le-PU lisetshenziswa njengento esezingeni eliphakeme yokufaka, ethandwa ngenxa ye-thermal conductivity ephansi kanye nokumelana nomswakama okuhle. Embonini yezimoto, izinto ze-PU zisetshenziselwa ukwenza amagwebu ezihlalo kanye nezingxenye zokunquma ingaphakathi njengoba zinikeza ukunethezeka okuhle nokuqina.
Ubungane bemvelo kanye nokusimama kwezinto ze-PU
Njengoba ukwanda kokuqwashisa ngemvelo, ukusimama kwezinto ze-PU sekuyinkinga enkulu. Ngokwesiko, amanye amakhemikhali ayingozi angasetshenziswa ekukhiqizeni i-PU, kodwa eminyakeni yamuva, imboni iye yathuthukisa izinqubo zokukhiqiza ezinobungani bemvelo ezifana ne-polyurethane esekelwe emanzini kanye nokusetshenziswa kwezinto ezingavuthiwe ezivuselelekayo. Lezi zinto ezintsha ze-PU azigcini nje ngokunciphisa umthelela emvelweni, kodwa futhi zithuthukisa ukuphepha nokuqina komkhiqizo.
Isifinyezo
Iyini impahla ye-PU? Kuyimpahla ye-polymer eguquguqukayo, esebenza kakhulu esetshenziswa kakhulu ezimbonini ezahlukahlukene. Kungakhathaliseki ukuthi isembatho, ukwakhiwa, ezezimoto, noma ukuvikelwa kwemvelo, i-PU ithandwa ngenxa yezakhiwo zayo ezinhle kakhulu ze-physicochemical. Ngokuthuthuka kobuchwepheshe kanye nokwenza ngcono izidingo zokuvikela imvelo, ububanzi bokufaka isicelo kanye nezinga lobuchwepheshe lezinto ze-PU lizoqhubeka nokukhula futhi libe ngcono.