Trab tal-kolla formaldehyde urea ， lest għall-ġarr ~

Deskrizzjoni tal-Prodott
Urea-formaldehyde resin (UF), also known as urea-formaldehyde resin, is the polycondensation of urea and formaldehyde under the action of a catalyst (alkaline or acidic catalyst) to form an initial urea-formaldehyde resin, and then forms an insoluble and infusible final phase under the action of a curing agent or additive. Reżina Thermosetting. Cured urea-formaldehyde resin is lighter in color than phenolic resin, translucent, resistant to weak acids and weak alkali, has good insulation properties, excellent wear resistance, and is cheap. It is the most commonly used variety among adhesives, especially in In the manufacturing of various artificial boards in the wood processing industry, urea-formaldehyde resin and its modified products account for about 90% of the total adhesive usage. Madankollu, ir-reżina tal-urea-formaldehyde hija faċli biex tiddekomponi meta tkun esposta għal aċidi qawwija u alkali. Għandu reżistenza ħażina tat-temp, viskożità inizjali fqira, jinxtorob kbir, fraġilità, reżistenza għall-ilma, u tixjiħ faċli. Bordijiet artifiċjali prodotti bir-rilaxx tar-reżina tal-urea-formaldehyde Formaldehyde waqt il-proċess tal-manifattura u l-użu. Problema, għalhekk trid tiġi modifikata.

Applikazzjoni

Ir-reżina urea-formaldehyde hija t-tip ta 'kolla l-iktar użat komunement. Especially in the manufacturing of various artificial boards in the wood processing industry, urea-formaldehyde resin and its modified products account for about 90% of the total adhesive usage.