Aldehyde-free plate
A technology for board and particle board, applied in the field of formaldehyde-free board, can solve the problems of high cost and complicated preparation process, and achieve the effects of low cost, simple production process and good water solubility
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Embodiment 1
[0041] Manganese dioxide catalyst preparation
[0042] Weigh 1.57g KMnO 4 , 1.69g MnSO 4 ·H 2 O and 0.23g of glucose were dissolved in 150ml of deionized water, mixed thoroughly, and reacted in a water bath at 70°C for 7 hours. After the reaction was completed, 35mL of deionized water was added to dilute to obtain a manganese dioxide catalyst slurry. Alternatively, the reaction product is directly filtered and dried at 60° C. to obtain a powder catalyst.
[0043] Wood-based panel coating
[0044] The single-layer board is coated according to the catalyst coating amount of 0.004g / cm 2 The above-mentioned manganese dioxide catalyst slurry was coated, and pressed into plywood by hot pressing at a pressing temperature of 150° C., a pressure of 5 MPa, and a hot pressing time of 4 minutes. The surface layer of plywood is based on the catalyst coating amount of 0.005g / cm 2 The manganese dioxide catalyst slurry described above was coated. Blow drying at 70°C to obtain formaldeh...
Embodiment 2
[0047] Manganese dioxide catalyst preparation
[0048] Weigh 1.57g KMnO 4 , 2.01g MnSO 4 ·H 2 O and 0.15 g of glucose were dissolved in 130 ml of deionized water, mixed thoroughly, and reacted in a water bath at 60° C. for 6 hours. After the reaction, 40 mL of deionized water was added to dilute to obtain a manganese dioxide catalyst slurry. Alternatively, the reaction product is directly filtered and dried at 60° C. to obtain a powder catalyst.
[0049] Wood-based panel coating
[0050] The single-layer board is coated according to the catalyst coating amount of 0.004g / cm 2 Coating the above-mentioned manganese dioxide catalyst slurry, adding urea-formaldehyde adhesive and pressing into plywood by hot pressing, the pressing temperature is 160° C., the pressure is 6 MPa, and the hot pressing time is 4.5 min. The surface layer of plywood is based on the catalyst coating amount of 0.005g / cm 2 The manganese dioxide catalyst slurry described above was coated. Blow drying at...
Embodiment 3
[0053] Manganese dioxide catalyst preparation
[0054] Weigh 1.57g KMnO 4 , 1.82g MnSO 4 ·H 2 O and 0.21g of citric acid were dissolved in 130ml of deionized water, mixed thoroughly and then reacted in a water bath at 80°C for 9h. After the reaction was completed, 40mL of deionized water was added to dilute to obtain a manganese dioxide catalyst slurry. Alternatively, the reaction product is directly filtered and dried at 60° C. to obtain a powder catalyst.
[0055] Wood-based panel coating
[0056] The single-layer board is coated according to the catalyst coating amount of 0.006g / cm 2 Coating the above-mentioned manganese dioxide catalyst slurry, adding urea-formaldehyde adhesive and pressing into plywood by hot pressing, the pressing temperature is 155° C., the pressure is 7 MPa, and the hot pressing time is 4.5 min. The surface layer of plywood is based on the catalyst coating amount of 0.007g / cm 2 The manganese dioxide catalyst slurry described above was coated. Bl...
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