Izigxivizo ze-polyurethane eziphendukile ziyizinto ezinhle kakhulu zokuvala ezinokumelana okuhle kakhulu nokugqoka, ukugqwala namazinga okushisa aphezulu futhi zisetshenziswa ezinhlobonhlobo zezicelo zezimboni.Lesi sihloko sizochaza izici eziyisisekelo, izindawo zokufaka isicelo kanye nezinzuzo zezimpawu ze-polyurethane eziphendukile.Izimpawu zibuye zibizwe ngokuthi izimpawu noma izimpawu zamafutha, zakhiwe ingxenye eyodwa noma eziningana zekhava emise okwendandatho, egxilwe ku-shaft, ephethe isethi yezindandatho, nenye isethi yezindandatho noma othintana naye we-gaskets noma yakha igebe elincane le-labyrinth, dlala. indima ekuhlukaniseni uwoyela negesi ewuketshezi, ukuvimbela ukuchichima kwamafutha noma ukudlula kanye nokuhlasela kwezinto zangaphandle.Ngesikhathi esifanayo, ingakwazi futhi ukuthwala ingcindezi, ngaphakathi kwebanga elithile elinendima ekabili yokuthwala ingcindezi nokubeka uphawu.Izigxivizo ze-polyurethane eziguquliwe, ezinokumelana nokuguga, uwoyela, i-asidi, i-ozone, ukuguga, izinga lokushisa eliphansi, izinyembezi, umthelela kanye nezinye izici, ukuguqula izimpawu ze-polyurethane zithwala umthamo wokusekela, osetshenziswa kabanzi emikhakheni ehlukahlukene.Kafushane, izigxivizo ze-polyurethane eziphendukile zinezinzuzo eziningi futhi zingasetshenziswa kabanzi emikhakheni ehlukahlukene yezimboni.Ngakho-ke, lapho ukhetha into yokuvala uphawu, izigxivizo ze-polyurethane eziphendukile ziyisinqumo esihle.
Ukuphumelela kwe-polyurethane njengempahla yotywino kwafika ekuqaleni kwawo-1980, lapho abakhiqizi abaningi benza izinto zokusetshenziswa ze-polyurethane ezazimelana kakhulu ne-hydrolysis.Lezi zinto ezintsha zikhiqize ama-polyurethane seal ahlala eguquguquka ezicindezelweni eziphezulu futhi afinyelela ku-+110 ° C, afinyelela ukusebenza okungcono kokuvala nempilo ende yokusebenza kune-polyurethane yasekuqaleni (eyayikwazi ukumelana nezinga lokushisa eliphezulu elingu-+80 ° C).Lo mphumela uvula umnyango wezinhlelo zokusebenza ze-hydraulic emishinini ephathwayo.
Isikhathi sokuthumela: Apr-18-2023
