Urea -formaldehydlimpulver ， klar til forsendelse ~

Produktbeskrivelse
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. Termohærdende harpiks. 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. Urea-formaldehydharpiks er imidlertid let at nedbrydes, når den udsættes for stærke syrer og alkalier. Det har dårlig vejrbestandighed, dårlig indledende viskositet, stor krympning, skørhed, vandbestandighed og let aldring. Kunstige tavler produceret med urinstof-formaldehydharpiksudgivelsesformaldehyd under fremstillings- og brugsprocessen. problem, så det skal ændres.

Anvendelse

Urea-formaldehydharpiks er den mest almindeligt anvendte type klæbemiddel. 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.