Ureum formaldehyde lijmpoeder, klaar voor verzending ~

Productbeschrijving
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. Thermohardende hars. 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. Ureum-formaldehydehars is echter gemakkelijk te ontbinden bij blootstelling aan sterke zuren en alkalisten. Het heeft een slechte weerweerstand, slechte initiële viscositeit, grote krimp, brosheid, waterweerstand en gemakkelijk veroudering. Kunstmatige boards geproduceerd met ureum-formaldehyde hars release formaldehyde tijdens het productie- en gebruiksproces. Probleem, dus het moet worden gewijzigd.

Sollicitatie

Ureum-formaldehydehars is het meest gebruikte type lijm. 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.