Modified wood dyeing method
A dyeing method and modified technology, which is applied in wood treatment, wood processing equipment, wood treatment details, etc., can solve problems such as uneven structure, achieve the effect of wide chromatographic range, uniform color, and improved dyeing levelness
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Embodiment 1
[0024] Example 1: Staining of acetylated pear wood boards
[0025] 558 Dehong soaked 10.15g of acetylated pear wood board in water for 30min (weight gain was about 7.5%), and hung it in supercritical CO 2Add 0.100g of Disperse Red 73 to the dyeing jar (1000mL) of the fluid dyeing equipment, and seal the dyeing jar. Inject CO at 130°C 2 , to a pressure of 35MPa, and keep it warm at 130°C for 240min. After the staining was completed, the CO was recovered under reduced pressure. 2 and dyes, and lower the temperature to below 40°C. Take out the dyeing vat, and take out the dyed acetylated pear wood board to obtain a evenly colored maroon acetylated pear wood board with grade 4 color fastness to washing.
Embodiment 2
[0029] Embodiment 2: the dyeing of acetylated Chinese fir powder
[0030] After mixing 5.00g acetylated fir powder and 0.050g Disperse Red 152, add to supercritical CO 2 In the dyeing jar (1000mL) of the fluid dyeing equipment, then evenly drop 2.0mL of water onto the acetylated fir powder, and seal the dyeing jar. Inject CO at 130°C 2 Gas to a pressure of 30MPa, and maintain for 90min. After the staining was completed, the CO was recovered under reduced pressure. 2 and dyes, and lower the temperature to below 40°C. Take out the dyeing vat and pour out the dyed wood powder in the vat to obtain evenly colored red acetylated fir powder with a color fastness to washing of grade 4.
[0031] The above-mentioned red acetylated Chinese fir powder was hot-pressed at 120°C and 2.0 MPa for 10 minutes to obtain red acetylated wood boards.
Embodiment 3
[0035] Example 3: Staining of benzylated Chinese fir powder
[0036] After mixing 20.00g benzylated fir powder and 0.400g disperse blue 148, add to supercritical CO 2 In the dyeing jar (1000mL) of the fluid dyeing equipment, 2.0mL of water was evenly added dropwise to the benzylated fir powder. Airtight dyeing tank, through 120 ℃ CO 2 Gas to a pressure of 25MPa, and keep for 45min. After the staining was completed, the CO was recovered under reduced pressure. 2 Gas and dye, and cool down to 40°C. Take out the dyeing vat, and pour out the dyed wood powder in the vat to obtain dark blue benzylated fir powder with uniform color, and its color fastness to washing is grade 4.
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