Tectona grandis color change treatment method
A treatment method and technology of teak, which is applied in the field of physical discoloration of teak, can solve the problems of large deviation of moisture content in the board, low treatment efficiency, long health treatment time, etc., achieve uniform moisture content, improve production efficiency, and improve The effect of processing efficiency
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[0036] Example 1: In this example, the processing season is summer, and the outdoor temperature is 35-37°C, for reference figure 1 The shown teak discoloration treatment method includes the following treatment steps in sequence.
[0037] S101. The step of adjusting the moisture content. This step is to adjust the moisture content of the teak stock to 10-12%, and the deviation of the moisture content in the board is less than 1.5%.
[0038] S102. The step of surface wet treatment. This step is to roll-coat a wetting liquid on the surface of the teak blank using a sponge roll coater, wherein the wetting liquid is clear water, and the roll coating amount is 40±1g / ㎡.
[0039] S103. The step of heating treatment. This step is to add a hot air blower in the infrared light tunnel to simultaneously heat the teak wood blank by infrared light and convection heating (hot air heating). Through the joint action of the infrared light and the hot air blower, A heating temperature of 120±1℃ is forme...
Example Embodiment
[0047] Example 2: The difference between Example 2 and Example 1 is that in the step of S202. surface wet treatment, the amount of roll coating is 28±1g / ㎡; in the step of S203. heating treatment, it is in infrared light In the tunnel, through the action of infrared light, a heating temperature of 70±1℃ is formed in the infrared illumination tunnel. The time for the teak blank from entering the infrared illumination tunnel to leaving is 20s. In this step, infrared light can also be used. The temperature in the illumination tunnel is adjusted to a heating temperature of 50±2°C. At this time, the time for the teak blank from entering the infrared illumination tunnel to leaving is 25s.
Example Embodiment
[0048] Embodiment 3: In this embodiment, the treatment season is winter, and the outdoor temperature is minus 5-5°C. A teak discoloration treatment method includes the following treatment steps in sequence.
[0049] S301. The step of adjusting the moisture content. This step is to adjust the moisture content of the teak blank to 9-11%, and the deviation of the moisture content in the board is less than 1%.
[0050] S302. In the step of surface wet treatment, a sponge roller coater is used to roll-coat a wetting liquid on the surface of the teak wood blank, wherein the wetting liquid is a mixture of clear water and a discoloration treatment agent. The discoloration treatment agent can be any commercially available one, for example The formulation of the modified solution containing isocyanate groups disclosed in Chinese Patent CN 107471358A, the mass ratio of the modified solution containing isocyanate groups to water is 1: (30-32), and the amount of roll coating is 20 ±1g / ㎡.
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