Umgubo weglue we-Urea Formaldehyde, olungele ukuthunyelwa ~

Ingcaciso yeMveliso
I-Urea-formaldehyde resin (UF), eyaziwa ngokuba yi-urea-formaldehyde resin, yi-polycondensation ye-urea kunye ne-formaldehyde phantsi kwesenzo se-catalyst (i-alkaline okanye i-acidic catalyst) ukwenza i-urea-formaldehyde resin yokuqala, ize emva koko yenze isigaba sokugqibela esinganyibilikiyo nesingenakufakwa phantsi kwesenzo se-ejenti yokuphilisa okanye isongezo. I-thermosetting resin. I-urea-formaldehyde resin ekhanyisiweyo inombala okhanyayo kune-phenolic resin, ikhanya, imelana ne-acids ezibuthathaka kunye ne-alkali ebuthathaka, ineempawu ezilungileyo zokugquma, imelana nokuguguleka okuhle, kwaye ingabizi kakhulu. Lolu hlobo lusetyenziswa kakhulu phakathi kwe-adhesives, ngakumbi kwi-Ekuveliseni iibhodi ezahlukeneyo zokwenziwa kwishishini lokucubungula iinkuni, i-urea-formaldehyde resin kunye neemveliso zayo eziguquliweyo zithatha malunga ne-90% yokusetyenziswa kwe-adhesive iyonke. Nangona kunjalo, i-urea-formaldehyde resin kulula ukuyibola xa ivezwa kwi-acids ezinamandla kunye ne-alkalis. Inokumelana nemozulu okubi, i-viscosity embi yokuqala, ukushwabana okukhulu, ukubuthathaka, ukumelana namanzi, kunye nokuguga lula. Iibhodi zokwenziwa ezenziwe nge-urea-formaldehyde resin zikhupha i-formaldehyde ngexesha lenkqubo yokuvelisa nokusetyenziswa.

Isicelo
Ingasetyenziswa kwiimveliso ezingadingi ukumelana namanzi aphezulu kunye neempawu ze-dielectric, ezinje ngee-power strips, ii-switch, iziphatho zoomatshini, ii-instrument casings, amaqhosha, izinto ezifunekayo zemihla ngemihla, imihombiso, iithayile ze-mahjong, izivatho zendlu yangasese, kwaye ingasetyenziswa nasekwenzeni ezinye izitya zetafile.

I-urea-formaldehyde resin lolona hlobo lweglue lusetyenziswa kakhulu. Ingakumbi ekuvelisweni kweebhodi ezahlukeneyo zokwenziwa kwishishini lokucubungula iinkuni, i-urea-formaldehyde resin kunye neemveliso zayo ezilungisiweyo zimalunga ne-90% yeglue iyonke esetyenziswayo.