High-strength fiberboard and preparation method thereof
A high-strength fiber and wood fiber technology, applied in the field of high-strength fiberboard and its preparation, can solve the problems of easy expansion deformation, low strength, etc.
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[0014] The present invention provides a kind of preparation method of high-strength fiberboard, and described preparation method comprises:
[0015] (1) Fiber slurry A is obtained by mixing wood fiber, buffer solution, laccase, ABTS, water and paraffin emulsion;
[0016] (2) Continuously inject air into the fiber slurry and stir, add filler particles, adhesives and additives after stirring for 30-40 minutes, and obtain fiber slurry B;
[0017] (3) The high-strength fiberboard is obtained by subjecting the fiber slurry B to a thermocompression molding process.
[0018] In a preferred embodiment of the present invention, in order to make the obtained fiberboard have more excellent mechanical properties and water resistance, relative to 100 parts by weight of wood fiber, the amount of the buffer solution is 50-80 parts by weight , the consumption of the laccase is 2-8 parts by weight, the consumption of the ABTS is 4-12 parts by weight, the consumption of the water is 20-40 part...
Embodiment 1
[0029] Mix 100g wood fiber (dried before use, the drying temperature is 90°C, and the drying time is 20min), 50g buffer solution (composed of citric acid, sodium citrate and water, and the concentration of citric acid is 0.1mol / L , the concentration of sodium citrate is 0.2mol / L), 2g laccase, 4gABTS, 20g water and 10g paraffin emulsion are mixed to obtain fiber slurry A; continue to pass air into the fiber slurry and stir for 30min Then add 15g polypropylene particles (average particle size 2mm), 5g modified urea-formaldehyde resin adhesive and 2g ammonium chloride to obtain fiber slurry B; the fiber slurry B is subjected to hot-press molding process (hot-press temperature is 100°C, hot pressing time is 10min, hot pressing pressure is 30kg / cm 2 ) to obtain the high-strength fiberboard A1.
Embodiment 2
[0031] Mix 100g wood fiber (dried before use, the drying temperature is 110°C, and the drying time is 40min), 80g buffer solution (composed of citric acid, sodium citrate and water, and the concentration of citric acid is 0.2mol / L , the concentration of sodium citrate is 0.3mol / L), 8g laccase, 12gABTS, 40g water and 20g paraffin emulsion are mixed to obtain fiber slurry A; continue to pass air into the fiber slurry and stir for 40min Finally, 25g of polyethylene particles (average particle size 5mm), 12g of phenolic resin adhesive and 8g of ammonium sulfate were added to obtain fiber slurry B; The hot pressing time is 20min, and the hot pressing pressure is 110kg / cm 2 ) to obtain the high-strength fiberboard A2.
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