Polyurethane (rufi, sealants, manne)
Danshin da ke cikin tsarin PU yana amsawa da isocyanate, komai a cikin samfuran polyurethane guda ɗaya ko ɓangarori biyu, waɗanda ke samar da amine da carbon dioxide, amine yana ci gaba da amsawa da isocyanate, don haka amfaninsa don fitar da iskar carbon dioxide a lokaci guda, yana samar da kumfa a saman fim ɗin fenti, wanda ke haifar da lalacewa ko ma aikin fim ɗin fenti.
Kashi 2% zuwa 5% na sieve na kwayoyin halitta (foda) a cikin tsarin ya isa ya cire ragowar danshi a cikin tsarin PU, amma a ƙarshe ya dogara da danshi a cikin tsarin.
Rufin hana lalatawa
A cikin sinadarin primer mai arzikin zinc na epoxy, wani ƙaramin adadin ruwa zai samar da kyakkyawan amsawa tare da foda na zinc, ya samar da hydrogen, ya ƙara matsin lamba a cikin ganga, ya rage tsawon rayuwar primer, wanda ke haifar da matsewa, juriyar lalacewa da tauri na fim ɗin rufewa. Sieve na molecular (foda) a matsayin abin sha mai sha ruwa, wanda yake shawa ta jiki gaba ɗaya, zai kawar da ruwa kuma ba tare da wani tasiri ga substrate ba. Don haka sieve na molecular yana da aminci kuma ya dace da tsarin rufewa mai hana lalata.
Rufin foda na ƙarfe
Irin waɗannan halayen na iya faruwa a cikin murfin foda na ƙarfe, kamar a cikin murfin foda na aluminum.
Kayayyaki masu alaƙa:Sifewar kwayoyin halitta ta JZ-AZ