Wood stain and method of using the same

Abstract

A wood stain and a method for using the same. The raw materials for preparing the wood stain include the following components: water, a plant-based stain, citric acid, tannic acid, clam shell powder, and mica powder. By weight percentage, the plant-based stain accounts for 35% to 71%, the citric acid accounts for 4% to 10%, the tannic acid accounts for 5% to 25%, the clam shell powder accounts for 12% to 21%, and the mica powder accounts for 20% to 29%, with the remainder being water. The wood stain provided by the present invention can not only obtain a stain of any color by using the plant-based stain, citric acid, tannic acid, and potassium acetate, but also, because the plant-based stain is used, it is environmentally friendly and the color is close to natural, thereby making the dyed wood closer to nature and more in line with people's usage expectations. The present invention also provides a method for using the wood stain.

Description

Technical Field

[0001] The present invention relates to the technical field of wood-based dyeing, in particular to a wood dye and a use method thereof. Background Art

[0002] Wood flooring is often used in high-quality homes and offices. Bare wood can be stained to change its color, as the natural color of wood is sometimes not suitable for its surroundings. In China, there has been a constant growth spurt between traditional solid wood flooring and new engineered wood flooring, represented by three-layer or multi-layer solid wood. In the past two years, new engineered wood flooring has maintained a high growth rate of over 30%. In recent years, China has enjoyed a strong domestic demand market, and demand for furniture and building materials remains high. The upgrade in the solid wood flooring category triggered by new engineered wood flooring may be a key driver of the continued consumer boom in home flooring. Engineered wood flooring is a type of wood flooring derived from the solid wood flooring family, making it a new type of solid wood flooring. Engineered wood flooring, with its natural wood feel, easy installation and maintenance, corrosion resistance, moisture resistance, antibacterial properties, and compatibility with electric heating, has become a popular flooring type in Europe and the United States and is gradually gaining acceptance among the Chinese public. Currently, the dyes used in traditional dyes and dyeing methods are mostly chemical dyes, and their ingredients are mostly ferrous sulfate, acetic acid, ferrous sulfate, copper sulfate, penetrants, etc. These chemical dyes are not friendly to the environment and users, and are not conducive to environmental protection and health. Summary of the Invention

[0003] In view of this, the present invention provides a wood stain and a method of using the same to solve the above technical problems.

[0004] A wood stain is prepared from raw materials consisting of water, a plant-based stain, citric acid, tannic acid, clamshell powder, and mica powder. By weight, the plant-based stain comprises 35% to 71%, the citric acid comprises 4% to 10%, the tannic acid comprises 5% to 25%, the clamshell powder comprises 12% to 21%, the mica powder comprises 20% to 29%, and the remainder is water. The wood is stained by both immersion and spraying, with the clamshell and mica powders added only during the spraying process.

[0005] Furthermore, the raw materials for preparing the wood stain also include potassium acetate.

[0006] Furthermore, the weight percentage of the potassium acetate is less than 7%.

[0007] Furthermore, when the wood is required to have a certain color difference, potassium acetate is not added to the wood stain.

[0008] Furthermore, the content of the plant-derived dye is 39%.

[0009] Furthermore, the content of citric acid is 6%.

[0010] Furthermore, the content of tannic acid is 13%.

[0011] Furthermore, the weight percentages of the clam shell powder and the mica powder are 13% and 21% respectively.

[0012] A method for using the wood stain as described above comprises the following steps:

[0013] STEP 101: Provide the wood to be dyed and place it in a drying kiln to dry it to a moisture content of 8% to 14%;

[0014] STEP 102: Providing the wood stain according to any one of claims 1 to 8, wherein the wood stain is a mixture of a plant-derived dye, citric acid, and tannic acid, but does not contain clam shell powder and mica powder;

[0015] STEP 103: Mix the above materials to form a solution;

[0016] STEP 104: Soak the wood in the above solution for 6 to 24 hours;

[0017] STEP 105: Dry the wood soaked with wood stain in STEP 104 in a conventional manner;

[0018] STEP 106: Polish the surface of the wood dried in STEP 105;

[0019] STEP 107: Repeat STEP 104 to STEP 106.

[0020] STEP 108: Provide a spraying device and spray the solution formed by adding the clam shell powder and mica powder to the solution in STEP 103 onto the wood treated in STEP 106;

[0021] STEP 109: Allow the wood to dry naturally after being sprayed in STEP 108;

[0022] STEP 110: Repeat STEP 108 to STEP 109;

[0023] STEP 111: Use high-frequency vacuum drying to dry the wood and complete the dyeing of the wood.

[0024] Furthermore, the raw materials for preparing the wood stain also include potassium acetate, and the weight percentage of the potassium acetate is less than 7%.

[0025] Compared with the prior art, the wood dye provided by the present invention is not only able to obtain a dye of any color by using the plant-derived dye, citric acid, tannic acid, and potassium acetate, but also environmentally friendly and close to natural color due to the use of the plant-derived dye, thereby improving the wood after dyeing to be closer to nature and more in line with people's expectations of use. The added citric acid, tannic acid, and potassium acetate are all for ensuring the quality of the plant-derived dye, that is, they will not affect the color of the plant-derived dye, while also preventing the plant-derived dye from being oxidized or deteriorating, and also ensuring the stability of the color. In order to increase the aesthetics of the wood, the clam shell powder and mica powder are added so that the wood has a sparkling and sparkling appearance under light, and in order to add the clam shell powder and mica powder, the present invention divides the dyeing process into soaking and spraying, and only adds the clam shell powder and mica powder to the dyeing solution during spraying, thereby obtaining the desired dyed wood. DETAILED DESCRIPTION

[0026] The following is a further detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0027] A wood stain is composed of the following components: water, a plant-based stain, citric acid, potassium acetate, clam shell powder, and mica powder. In terms of weight percentage, the plant-based stain comprises 35% to 71%, the citric acid comprises 4% to 10%, the tannic acid comprises 5% to 25%, the potassium acetate comprises 0% to 7%, the clam shell powder comprises 12% to 21%, the mica powder comprises 20% to 29%, and the remainder is water.

[0028] The plant-derived dye itself is a prior art. It can be extracted from the residue after various essential oil extractions, tea leaves, or other plants to obtain a plant-derived pigment, i.e., a plant-derived dye. It is conceivable that different colors can be extracted from different plants. For example, if red is needed, it can be extracted from madder, safflower, sappan wood, etc. If yellow is needed, it can be extracted from gardenia, sophora japonica, turmeric, etc. If blue is needed, it can be extracted from indigo, isatis indigotica, indigo, and scutellaria baicalensis, etc., which will not be described in detail here. As for how to provide plant-derived pigments from the residue, the extraction methods include but are not limited to ethanol extraction and pigment extraction, but these are prior art and will not be described in detail here. The content of the plant-derived dye should be limited to 35% to 71%, because less than 35% will result in poor dyeing effect, while more than 71% will not result in significant difference in dyeing effect, and the excess will also result in waste of raw materials. At the same time, the dosage ratio of some solid dyes should be lower than that of liquid dyes.

[0029] The citric acid is used as a preservative, which can ensure that the plant-based dye will not be oxidized and become ineffective. The citric acid itself is a prior art and will not be described in detail here. Citric acid is an important organic acid with a molecular formula of C6H8O7. It is a hydroxy acid and contains four active groups, three carboxyl groups and one hydroxyl group. Citric acid can ionize to produce three H+ ions, which has good reducing properties and can be combined with phenolic antioxidants to enhance its antioxidant effect. However, the weight percentage of the citric acid must be limited to 4% to 10%. If it is more than 10%, it will cause the dyed wood to change color and also cause a waste of raw materials. If it is less than 4%, the plant-based pigment will oxidize and turn black, affecting the dyeing effect.

[0030] Tannic acid itself belongs to the phenolic antioxidant class and is used as an antioxidant and antibacterial agent. Tannic acid binds to the metal ions and proteins required for microbial growth, thereby changing the structure of microbial cell membranes or directly affecting the metabolic processes of microorganisms, thereby achieving antibacterial activity, i.e., antimicrobial activity. Furthermore, the phenolic hydroxyl groups in tannic acid are easily oxidized, releasing hydrogen ions in the body that compete with free radicals such as reactive oxygen species for binding, thereby protecting lipids from oxidation by blocking free radical chain reactions. The greater the number of phenolic hydroxyl groups, the stronger the inhibitory effect on free radicals and the greater the antioxidant capacity. However, the percentage of tannic acid should be between 5% and 25%. If it exceeds 25%, the wood will discolor, and if it is less than 5%, it will not interact with citric acid to enhance the antioxidant effect.

[0031] The potassium acetate is used as a color preservative, that is, it protects the stability of the plant-derived pigment to a certain extent and prevents it from changing color. The potassium acetate itself is colorless, but it can react with the plant-derived pigment to form a new substance. This new substance can enhance the stability of the pigment, thereby achieving the purpose of color protection. The potassium acetate itself is a neutral alkaline salt and has little effect on the acidity and alkalinity changes of other chemical reagents. At the same time, potassium acetate is a food-grade preservative and has little impact on the environment. The application of potassium acetate in the food industry is as a preservative and color preservative. Therefore, it has a good protective effect on the natural colors of animals and plants. At the same time, it can neutralize the acidity of citric acid and tannic acid to a certain extent, avoiding excessive acidity affecting the dyeing effect. However, the weight percentage of the potassium acetate should be limited to less than 7%. Because, for some application scenarios that do not require high color of the wood itself, or when the later surface decoration process has a covering color coating, or when the material itself requires a certain color difference, potassium acetate may not be needed. If it exceeds 7%, the alkalinity is too strong and will neutralize citric acid and tannic acid, thereby affecting the dyeing effect of the dye.

[0032] The clamshell powder and mica powder are used to provide the wood stain with wear resistance while also providing decorative properties, namely, providing bright spots and generating reflections under light. The weight percentage of the clamshell powder is limited to 12% to 21%, and the weight percentage of the mica powder is limited to 20% to 29%. Excessive amounts of clamshell powder and mica powder will excessively block the wood surface, affecting the dyeing effect and reducing the adhesion of the paint film after dyeing. Insufficient amounts of clamshell and mica powder will reduce the surface wear resistance and the light perception after dyeing. To achieve decorative purposes, the mesh size of the clamshell powder is between 200 and 400 mesh, and the mesh size of the mica powder is between 200 and 400 mesh. If the mesh size is too large, the particles are too small, and the decorative effect is not achieved, that is, the bright spots cannot be generated by the reflective effect. If the mesh size is too large, the particles are too large, and the wood surface is excessively blocked, affecting the dyeing effect and reducing the adhesion of the paint film after dyeing.

[0033] The present invention also provides a method for using the wood stain, which comprises the following steps:

[0034] STEP 101: Provide the wood to be dyed and place it in a drying kiln to dry it to a moisture content of 8% to 14%;

[0035] STEP 102: Provide the wood stain as described above, which is a mixture of a plant-based dye, citric acid, tannic acid, and potassium acetate, but does not contain clam shell powder and mica powder;

[0036] STEP 103: Mix the above materials to form a solution;

[0037] STEP 104: Soak the wood in the above solution for 6 to 24 hours;

[0038] STEP 105: Dry the wood soaked with wood stain in STEP 104 in a conventional manner;

[0039] STEP 106: Polish the surface of the wood dried in STEP 105;

[0040] STEP 107: Repeat STEP 104 to STEP 106.

[0041] STEP 108: Provide a spraying device and spray the solution formed by adding the clam shell powder and mica powder to the solution in STEP 103 onto the wood treated in STEP 106;

[0042] STEP 109: Allow the wood to dry naturally after being sprayed in STEP 108;

[0043] STEP 110: Repeat STEP 108 to STEP 109;

[0044] STEP 111: Use high-frequency vacuum drying to dry the wood and complete the dyeing of the wood.

[0045] In STEP 101, the wood must first be dried to a moisture content of 8% to 14%. Below 8% will result in a low moisture content, which will waste a lot of energy during the drying process and increase the probability of wood defects. Above 14%, the moisture content is too high, affecting the subsequent dyeing effect.

[0046] In Steps 102 and 103, a dye for soaking wood is prepared. This dye consists solely of a plant-based dye, citric acid, tannic acid, and potassium acetate, but does not contain clamshell powder or mica powder. This is because when soaking the unstained wood, these clamshell powder and mica powder are solid particles that can clog the wood's surface pores, affecting the dyeing effect. Furthermore, these particles adhere to the wood's surface, and polishing the wood after the initial dyeing process removes the surface layer, resulting in waste.

[0047] In STEP 104, the wood stain must be fully infiltrated into the wood by immersion. This is because the moisture content inside the wood is low after drying. Immersing the wood in the stain easily forms a high osmotic pressure due to the difference in moisture content inside and outside the wood, which enables the stain to quickly penetrate into the wood, thereby improving the staining efficiency and providing uniformity in the overall color of the stained wood.

[0048] In STEP 105, natural drying is necessary because soaking can reduce the deformation rate of the wood and enable the wood stain to penetrate deeper into the wood.

[0049] In STEP109, spraying treatment must be adopted. Firstly, after drying, the wood tends to be stable as a whole and is not prone to large changes in moisture content. Secondly, the residual amount of dye produced by spraying on the wood surface is much greater than the amount remaining by soaking, which is conducive to improving the color saturation of the wood surface. At the same time, when spraying, it is necessary to add the clam shell powder and mica powder to increase the aesthetics of the dyed wood. Moreover, the clam shell powder and mica powder can only be added during spraying, because after polishing, there are certain gaps exposed on the wood surface. By spraying, adding the dye with the clam shell powder and mica powder can block the pores on the wood surface to a certain extent, while improving the light effect of the wood surface, reducing the large-scale penetration of water into the wood interior, improving the dimensional stability of the wood, and reducing the energy consumption of wood drying in the later stage.

[0050] In STEP 111, high-frequency vacuum drying is used to stabilize the color of the wood surface and to improve the smoothness of the wood surface through the vacuum drying kiln.

[0051] Example

[0052] Wood used: Acacia, the pigment color is red extracted from the residue of Sumac

[0053] Dye: Raw materials: The weight percentage of the plant-derived dye is 39%, the weight percentage of the citric acid is 6%, the weight percentage of the tannic acid is 13%, the weight percentage of the potassium acetate is 3%, the weight percentage of the clam shell powder is 13%, and the weight percentage of the mica powder is 21%, and the rest is water.

[0054] Table 1 Surface data of two samples from the same batch after dyeing measured using a colorimeter

[0055]

[0056] From the data measured in Table 1, it can be seen that the color of the wood after dyeing is dark red with a slightly lower brightness, and the color difference of the wood from the same batch after dyeing is not large. This shows that the above-mentioned dye meets the requirements of dyeing.

[0057] Compared with the prior art, the wood dye provided by the present invention is not only able to obtain a dye of any color by using the plant-derived dye, citric acid, tannic acid, and potassium acetate, but also environmentally friendly and close to natural color due to the use of the plant-derived dye, thereby improving the wood after dyeing to be closer to nature and more in line with people's expectations of use. The added citric acid, tannic acid, and potassium acetate are all for ensuring the quality of the plant-derived dye, that is, they will not affect the color of the plant-derived dye, while also preventing the plant-derived dye from being oxidized or deteriorating, and also ensuring the stability of the color. In order to increase the aesthetics of the wood, the clam shell powder and mica powder are added so that the wood has a sparkling and sparkling appearance under light, and in order to add the clam shell powder and mica powder, the present invention divides the dyeing process into soaking and spraying, and only adds the clam shell powder and mica powder to the dyeing solution during spraying, thereby obtaining the desired dyed wood.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements or improvements within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A method for using a wood stain, comprising the following steps: STEP 101: Provide the wood to be dyed and place it in a drying kiln to dry it to a moisture content of 8% to 14%; STEP 102: Provide a wood stain, wherein the raw materials for preparing the wood stain are composed of water, a plant-based stain, citric acid, tannic acid, clam shell powder, and mica powder. In terms of weight percentage, the weight percentage of the plant-based stain is 35% to 71%, the weight percentage of the citric acid is 4% to 10%, the weight percentage of the tannic acid is 5% to 25%, the weight percentage of the clam shell powder is 12% to 21%, and the weight percentage of the mica powder is 20% to 29%. The remainder is water, and the sum of the weight percentages of the components of the wood stain is 100%. STEP 103: Mix the water, plant-derived dye, citric acid, and tannic acid provided in STEP 102 to form a solution; STEP 104: Soak the wood in the above solution for 6 to 24 hours; STEP 105: Allow the wood soaked in wood stain in STEP 104 to dry naturally; STEP 106: Polish the surface of the wood dried in STEP 105; STEP 107: Repeat STEP 104 to STEP 106. STEP 108: Provide a spraying device and spray the solution formed by adding the clam shell powder and mica powder provided in STEP 102 to the solution in STEP 103 onto the wood treated in STEP 106; STEP 109: Allow the wood to dry naturally after being sprayed in STEP 108; STEP 110: Repeat STEP 108 to STEP 109; STEP 111: Use high-frequency vacuum drying to dry the wood and complete the dyeing of the wood.

2. The method for using the wood stain according to claim 1, wherein: The raw materials for preparing the wood stain further include potassium acetate, and the weight percentage of the potassium acetate is less than 7%.

3. The method for using the wood stain according to claim 1, wherein: The weight percentage of the plant-derived dye is 39%.

4. The method for using the wood stain according to claim 1, wherein: The weight percentage of the citric acid is 6%.

5. The method for using the wood stain according to claim 1, wherein: The weight percentage of the tannic acid is 13%.

6. The method for using the wood stain according to claim 1, wherein: The weight percentages of the clam shell powder and the mica powder are 13% and 21% respectively.

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