Machitidwe oyambira a mankhwala panthawi yopaka mafuta opanda solvent

Ndi kupita patsogolo kosalekeza kwa ukadaulo, kusungunuka kosasinthika kumalandiridwa ndi opanga ma phukusi ambiri osinthika.

Ubwino wa lamination yopanda zosungunulira ndi wofulumira, wosavuta, wosawononga chilengedwe, komanso wotsika mtengo.

Ndikofunikira kwambiri kuti tidziwe momwe mankhwala amagwirira ntchito panthawi yopaka mafuta popanda kusungunuka kuti tipange zinthu zambiri.

Zigawo ziwiriGuluu wopanda zosungunuliraidapangidwa ndi polyurethane (PU), PU idaphatikizidwa ndi isocyanate(-NCO) yomwe imatchedwa kwambiri gawo la A, ndi polyol(-OH) yomwe imatchedwa kwambiri gawo la B. Tsatanetsatane wa zomwe zimachitika chonde onani pansipa;

Yankho lalikulu ndi pakati pa A ndi B, -NCO imakhala ndi mankhwala omwe amachititsa ndi -OH, nthawi yomweyo, chifukwa madzi alinso ndi gulu la ntchito la -OH, madzi amakhala ndi mankhwala omwe amachititsa ndi gawo la A lomwe limatulutsa CO2.₂, Mpweya woipa. Ndi polyurea.

Kampani ya CO₂ Zingayambitse vuto la thovu ndipo polyurea ingayambitse chisindikizo choletsa kutentha. Kupatula apo, ngati chinyezi chili chokwanira, madziwo amadya gawo la A lochuluka. Zotsatira zake n'zakuti guluu silingathe kuchira 100% ndipo mphamvu yolumikizirana imachepa.

Mwachidule, tikupangira kuti;

Kusunga guluu kuyenera kusungidwa pamalo ozizira komanso ouma kutali ndi chinyezi

Malo ogwirira ntchito ayenera kusunga chinyezi pakati pa 30% ~ 70%, ndikugwiritsa ntchito AC kuti azitha kuwongolera chinyezi.

Pamwambapa pali njira yoyambira ya mankhwala pakati pa zomatira ziwiri, koma guluu wa mono-component udzasiyana kwambiri, tidzayambitsa njira ya mono component chemical reaction mtsogolo.