Urea-formaldehyde resin wood adhesive modifier and applications thereof
A wood adhesive and urea-formaldehyde resin technology, applied in the directions of adhesive additives, adhesives, non-polymer adhesive additives, etc., can solve the problem of high brittleness of the adhesive layer, and achieve the improvement of veneer strength, cost reduction, and formaldehyde release. volume reduction effect
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Embodiment 1
[0016] Urea-formaldehyde wood adhesives are unmodified.
[0017] E2 grade urea-formaldehyde resin adhesive 100kg, flour 20kg, stir evenly, according to the amount of glue applied 60g / m 2 Apply it to the fiberboard, and then paste it with oak veneer with a thickness of 0.2mm. Under the action of 1.1Mpa, it is hot-pressed at 110°C to form a finished board. The surface bonding strength of the veneered panels in the finished product is 1.0MPa, and the formaldehyde emission is 2.2mg / L.
Embodiment 2
[0019] Weigh 10kg of styrene-acrylic latex, 1kg of silicon dioxide particles, 1kg of light calcium carbonate, 1kg of titanium dioxide particles, 0.1kg of ferric chloride, 0.1kg of sodium dodecylsulfonate, and 1kg of polyethylene glycol according to the mass ratio. In 100kg E2 urea-formaldehyde resin adhesive, stir evenly, according to the amount of glue applied 60g / m 2 Apply it to the fiberboard, and then paste it with oak veneer with a thickness of 0.2mm. Under the action of 1.1Mpa, it is hot-pressed at 110°C to form a finished board. The surface bonding strength of the veneered panels in the finished product is 1.10MPa, and the formaldehyde emission is 1.4mg / L.
Embodiment 3
[0021] Weigh 20kg of styrene-acrylic latex, 5kg of silicon dioxide particles, 10kg of light calcium carbonate, 5kg of titanium dioxide particles, 0.1kg of ferric chloride, 0.1kg of sodium dodecylsulfonate, and 5kg of polyethylene glycol according to the mass ratio. In 100kg E2 urea-formaldehyde resin adhesive, stir evenly, according to the amount of glue applied 60g / m 2 Apply it to the fiberboard, and then paste it with oak veneer with a thickness of 0.2mm. Under the action of 1.1Mpa, it is hot-pressed at 110°C to form a finished board. The surface bonding strength of the veneered panels in the finished product is 1.15MPa, and the formaldehyde emission is 1.1mg / L.
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