mankhwala

Basic mankhwala anachita pa solventless lamination

Ndi patsogolo mosalekeza luso, zosungunulira lamination ndi kulandiridwa ndi ambiri kusintha phukusi wopanga.

Mofulumira, zosavuta, zowongoka zachilengedwe, zotsika mtengo ndizopindulitsa za lamination zopanda solvent.

Ndikofunikira kwambiri kuti tidziwe momwe mankhwala amachitira panthawi yopanda zosungunulira kuti apange bwino kwambiri.

Zigawo ziwiriZomatira zopanda zosungunuliraidapangidwa ndi polyurethane (PU), PU idaphatikizidwa ndi isocyanate(-NCO) yomwe imatchedwa A chigawo, ndi polyol(-OH) yomwe imadziwika kuti B chigawo.Tsatanetsatane wa momwe mungachitire chonde onani pansipa;

Basic mankhwala anachita pa solventless lamination

Zomwe zimayambira zili pakati pa A ndi B, -NCO imakhala ndi mankhwala -OH, nthawi yomweyo, chifukwa cha madzi ali ndi -OH ntchito gulu, madzi adzakhala ndi mankhwala ndi A chigawo kumasula CO.2, Carbon dioxide.Ndipo polyurea.

Mtengo CO2 Zingayambitse vuto la kuwira ndipo polyurea ikhoza kuyambitsa chisindikizo chotsutsa kutentha.Kupatula ngati chinyezi chikukwera mokwanira, madziwo amawononga gawo lochulukirapo la A.Zotsatira zake ndikuti zomatira sizingachiritsidwe 100% ndipo mphamvu yolumikizira imatsika.

Mwachidule, tikupempha kuti;

Kusungirako zomatira ziyenera Kusungidwa pamalo ozizira, ouma kutali ndi chinyezi

Msonkhanowo uyenera kusunga chinyezi pakati pa 30% ~ 70%, ndikugwiritsa ntchito AC kuwongolera kuchuluka kwa chinyezi.

Pamwambapa pali zomwe zimachitika pakati pa zomatira pagawo ziwiri, koma zomatira zamtundu wa mono-component zidzakhala zosiyana kotheratu, tidzawonetsa mono component chemical reaction mtsogolomo.


Nthawi yotumiza: Dec-07-2022