Umwuma wa Polyurethane

Polyurethane (impuzu, kashe, ibifunga)

Ubushuhe muri sisitemu ya PU bugira ingaruka kuri isocyanate, hatitawe kubintu bimwe cyangwa ibice bibiri bya polyurethane, bitanga amine na dioxyde de carbone, amine ikomeza kwitwara hamwe na isocyanate, kuburyo ikoreshwa ryayo kugirango irekure gaze karuboni icyarimwe, shiraho ibibyimba hejuru ya firime irangi, biganisha ku kwangirika cyangwa no gukora kunanirwa kwa firime.

2% ~ 5% bya sikeli ya molekile (ifu) muri sisitemu irahagije kugirango ikureho ubuhehere busigaye muri sisitemu ya PU, ariko amaherezo biterwa nubushuhe buri muri sisitemu.

Kurwanya ruswa

Muri epoxy zinc ikungahaye kuri primer, ubwinshi bwamazi azatanga reaction ikomeye hamwe nifu ya zinc, bitange hydrogène, byongere umuvuduko muri barriel, bigabanya ubuzima bwumurimo wa primer, bikaviramo gukomera, kwambara birwanya ubukana ya firime.Icyuma cya molekuline (ifu) nkicyuma cyinjiza amazi, kikaba ari adsorption yumubiri rwose, kizakuraho amazi kandi nta reaction na substrate.Icyuma cya molekile rero gifite umutekano kandi cyoroshye kuri sisitemu yo kurwanya ruswa.

Ifu y'ifu

Imyitwarire nkiyi irashobora kugaragara mubyuma byifu, nko muri aluminiyumu yifu.