CN117683410A - Wood coloring agent and application method thereof - Google Patents

Abstract

The wood stain comprises water, plant source stain, citric acid, tannic acid, clam shell powder and mica powder. The plant source coloring agent comprises, by weight, 35% -71% of a plant source coloring agent, 4% -10% of citric acid, 5% -25% of tannic acid, 12% -21% of clam shell powder, 20% -29% of mica powder and the balance of water. According to the wood stain, the plant source stain, the citric acid, the tannic acid and the potassium acetate are used, so that the stain with any color can be obtained, and the environment is protected and the color is close to the natural color due to the use of the plant source stain, so that the dyed wood can be improved to be more natural, and the wood stain meets the use expectations of people. The invention also provides a using method of the wood coloring agent.

Description

Wood coloring agent and application method thereof

Technical Field

The invention relates to the technical field of wood-based dyeing, in particular to a wood dyeing agent and a using method thereof.

Background

Wooden floors are often used in quality homes and offices. Bare wood can be dyed to change its color, as the natural color of wood is sometimes unsuitable for its surroundings. The domestic traditional pure wood floor and the new solid wood composite floor represented by three or more layers of solid wood always have the situation of eliminating each other. The new solid wood composite floor keeps high growth rate of more than 30% in the last two years. Under the economic pattern of recent years, the domestic market has a strong internal market, and the demand of the Chinese furniture building material market is also great. The upgrading of solid wood floor products caused by the new solid wood composite floor or the key power for continuously pushing the home decoration floor to consume hot flashes. The solid wood composite floor is a wood floor type derived from a family of solid wood floors, so it is a new solid wood floor. The solid wood composite floor has become the main popular floor type in Europe and America and is accepted by the people in China gradually due to the advantages of natural wood texture, easy installation and maintenance, corrosion resistance, moisture resistance, bacteria resistance, electric heating and the like. Most of the existing traditional colorants and the conventional dyeing methods use chemical colorants, and the components of the colorants are ferrous sulfate, acetic acid, ferric sulfate, copper sulfate, penetrant and the like, so that the chemical colorants are not friendly to the environment and users, and are not beneficial to the environmental protection and the health.

Disclosure of Invention

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

The timber dye consists of water, plant source dye, citric acid, tannic acid, clam shell powder and mica powder. The plant source coloring agent comprises, by weight, 35% -71% of a plant source coloring agent, 4% -10% of citric acid, 5% -25% of tannic acid, 12% -21% of clam shell powder, 20% -29% of mica powder and the balance of water. The wood is required to be dyed in a soaking and spraying mode when in use, while the clam shell powder and mica powder will be added only at the time of spraying.

Further, the preparation raw materials of the wood stain also comprise potassium acetate.

Further, the weight percentage of the potassium acetate is less than 7%.

Further, when the wood is required to have a certain color difference, the wood stain is free of potassium acetate.

Further, the content of the plant-derived colorant is 39%.

Further, the content of the citric acid is 6%.

Further, the content of tannic acid was 13%.

Further, the weight percentages of the clam shell powder and the mica powder are 13% and 21%, respectively.

A method of using a wood stain as described above comprising the steps of:

STEP101: providing wood to be dyed, and placing the wood in a drying kiln to be dried until the water content is 8% -14%;

STEP102: providing a wood stain according to any one of claims 1 to 8 mixed with a plant-derived stain, citric acid, tannic acid, but not comprising clam shell powder and mica powder;

STEP103: mixing the above materials and forming a solution;

STEP104: soaking the wood in the solution for 6-24 hours;

STEP105: conventionally drying the wood in which STEP104 is soaked with the wood stain;

STEP106: performing surface polishing treatment on the wood after STEP105 is dried;

STEP107: repeating STEP104 to STEP106;

STEP108: providing a spraying device, and spraying a solution formed by adding the clam shell powder and the mica powder into the solution in STEP103 onto the wood treated by STEP106;

STEP109: naturally drying the wood sprayed by STEP 108;

STEP110: repeating STEP108 to STEP109;

STEP111: and drying the wood by adopting a high-frequency vacuum drying mode to finish the dyeing of the wood.

Further, the preparation raw materials of the wood stain further comprise potassium acetate, and the weight percentage of the potassium acetate is less than 7%.

Compared with the prior art, the wood stain provided by the invention is difficult to use the plant source stain, the citric acid, the tannic acid and the potassium acetate, so that the stain with any color can be obtained, and the environment is protected and the color is close to the natural color due to the use of the plant source stain, thereby improving the similarity of the dyed wood to the natural color and meeting the use expectations of people. The citric acid, the tannic acid and the potassium acetate are added to ensure the quality of the plant-source coloring agent, namely the color of the plant-source coloring agent is not affected, the plant-source coloring agent is not oxidized or deteriorated, and the stability of the color is ensured. In order to increase the aesthetic degree of the wood, the clam shell powder and the mica powder are added, so that the wood has the perception of a flash crystal under illumination, and in order to increase the clam shell powder and the mica powder, the dyeing process is divided into soaking and spraying, and the clam shell powder and the mica powder are added into the dyeing solution only during spraying, so that the required dyed wood is prepared.

Detailed Description

Specific embodiments of the present invention are described in further detail below. It should be understood that the description herein of the embodiments of the invention is not intended to limit the scope of the invention.

The wood coloring agent consists of water, plant source coloring agent, citric acid, potassium acetate, clam shell powder and mica powder. The plant source coloring agent comprises, by weight, 35% -71% of a plant source coloring agent, 4% -10% of citric acid, 5% -25% of tannic acid, 0% -7% of potassium acetate, 12% -21% of clam shell powder, 20% -29% of mica powder and the balance of water.

The plant-derived coloring agent is a prior art, and can be extracted from residues or tea dust after extraction of various essential oils or other plants, thereby obtaining a plant-derived coloring agent, namely the plant-derived coloring agent. It is conceivable that different colors may be extracted from different plants, and if red is required, from madder, safflower, sappan wood, etc. Yellow is required, such as fructus Gardeniae, flos Sophorae Immaturus, curcuma rhizome, etc., and blue is required, such as herba Polygoni Avicularis, isatis tinctoria, radix Isatidis, and herba Kalimeridis, etc., which are not described herein. As to how to provide the plant-derived pigment from the residue, the extraction method thereof includes, but is not limited to, ethanol extraction, pigment extraction, etc., but is the prior art and is not described herein. The content of the plant-derived coloring agent should be limited to 35% -71%, because less than 35% results in poor dyeing effect, but more than 71% results in no obvious difference change in dyeing effect, and the excess results in waste of raw materials, and at the same time, the dosage proportion of the solid-type coloring agent is lower than that of the liquid-type coloring agent.

The citric acid acts as a preservative which ensures that the plant-derived colorant is not oxidized to failure. The citric acid itself is a prior art and will not be described in detail herein. Citric acid is an important organic acid with a molecular formula of C6H8O7, belongs to hydroxy acid, and comprises four active groups, three carboxyl groups and one hydroxyl group. Citric acid can ionize to generate three H+ ions, has good reducibility, and has the effect of improving the antioxidation of the citric acid in combination with phenol antioxidants. However, the weight percentage of the citric acid must be limited to 4% -10%, and if more than 10% it causes discoloration of the dyed wood, and also causes waste of raw materials. If the content is less than 4%, the plant-derived pigment is oxidized and blackened, and the dyeing effect is affected.

The tannic acid itself belongs to a phenol-based antioxidant, which is used as an antioxidant and an antibacterial agent. Tannic acid changes the cell membrane structure of the microorganism or directly influences the metabolic process of the microorganism by combining metal ions and proteins required by the growth of the microorganism so as to achieve the aim of antibacterial activity, namely antibiosis. Meanwhile, the temporary phenolic hydroxyl groups of the tannic acid are extremely easy to oxidize, hydrogen ions can be released in organisms and are combined with free radicals such as active oxygen in a competitive manner, so that the lipid can be protected from being oxidized in a way of blocking the chain reaction of the free radicals, the more the number of the phenolic hydroxyl groups is, the stronger the inhibition effect of the phenolic hydroxyl groups on the free radicals is, and the stronger the antioxidation capability is. However, the content of tannic acid should be between 5% and 25%, if the content exceeds 25%, the wood is discolored, and less than 5% cannot interact with citric acid to improve the antioxidation effect.

The potassium acetate is used as a color retention agent, namely, the stability of the plant-derived pigment is protected to a certain extent, and the color change of the plant-derived pigment is prevented. The potassium acetate is colorless, but can react with the plant pigment to form a new substance, and the new substance can strengthen the stability of the pigment, thereby achieving the purpose of color protection. The potassium acetate belongs to neutral alkaline salt, has small influence on acid-base change of other chemical reagents, and simultaneously, the potassium acetate belongs to food-grade preservative and has small influence on environment. The potassium acetate is used as a preservative and a color fixative in the food industry, so that the natural color of animals and plants is better protected, and meanwhile, the acidity of citric acid and tannic acid can be neutralized to a certain extent, so that the influence of the too strong acidity on the dyeing effect is avoided. But the weight percentage of potassium acetate should be limited to less than 7%. Because, in some application scenes with low requirement on the self color of the wood or in the case of finishing with a cover color in the later surface decoration process, or in the case of a material with a certain difference in color difference, potassium acetate is not required, and if the alkalinity exceeds 7%, citric acid and tannic acid are neutralized too strongly, so that the dyeing effect of the dyeing agent is affected.

The clam shell powder and the mica powder are used for providing wear-resistant capability for the wood stain, and simultaneously have decoration, namely provide bright spots and can generate light reflection under illumination. The weight percentage of the clam shell powder is limited to 12% -21%, the weight percentage of the mica powder is limited to 20% -29%, excessive clam shell powder and mica powder can excessively shade the surface of wood to influence the dyeing effect, meanwhile, the adhesive force of a paint film at the later stage can be reduced, insufficient clam shell and mica powder can cause the surface wear resistance to be reduced, and the light sensation effect after dyeing is poor. Meanwhile, in order to achieve the aim of decoration, the mesh number of the clam shell powder is between 200 and 400 meshes, and the mesh number of the mica powder is between 200 and 400 meshes. Too large mesh number, then the granule is too little, then plays the effect of decorating, can not provide the bright spot at the effect of reflection of light promptly, and the too big mesh number, the granule is too big, then can shelter from timber surface excessively, influences dyeing effect, still can reduce later stage paint film adhesive force.

The invention also provides a using method of the wood coloring agent, which comprises the following steps:

STEP101: providing wood to be dyed, and placing the wood in a drying kiln to be dried until the water content is 8% -14%;

STEP102: providing a wood stain as described above which is mixed with a plant-derived stain, citric acid, tannic acid, potassium acetate, but does not comprise a clam shell powder and mica powder;

STEP103: mixing the above materials and forming a solution;

STEP104: soaking the wood in the solution for 6-24 hours;

STEP105: conventionally drying the wood in which STEP104 is soaked with the wood stain;

STEP106: performing surface polishing treatment on the wood after STEP105 is dried;

STEP107: repeating STEP104 to STEP106;

STEP108: providing a spraying device, and spraying a solution formed by adding the clam shell powder and the mica powder into the solution in STEP103 onto the wood treated by STEP106;

STEP109: naturally drying the wood sprayed by STEP 108;

STEP110: repeating STEP108 to STEP109;

STEP111: and drying the wood by adopting a high-frequency vacuum drying mode to finish the dyeing of the wood.

In STEP101, the wood must be dried to a moisture content of 8% -14%, and the moisture content of less than 8% may cause too low moisture content of the wood, so that a high energy waste is caused in the drying process, and the probability of occurrence of wood defects is increased. If the moisture content exceeds 14%, the moisture content of the wood is too high, which affects the dip dyeing effect of the post-dyeing agent.

In STEP102 and STEP103, a stain for soaking wood is prepared, which consists of only a plant-derived stain, citric acid, tannic acid, and potassium acetate, but does not contain clam shell powder and mica powder. Because the clamshell powder and the mica powder are solid particles when the undyed wood is soaked, the clamshell powder and the mica powder can block pores on the surface of the wood, and the dip dyeing effect is affected. At the same time it adheres to the surface of the wood, polishing said wood after the first dip dyeing removes the surface layer of the wood, resulting in wastage of this material.

In STEP104, the wood stain must be sufficiently impregnated into the wood by soaking because the moisture content in the dried wood is low, and the wood is soaked into the stain, so that a high osmotic pressure is easily formed due to the difference of the moisture contents in and out of the wood, and the stain is promoted to be quickly soaked into the wood, thereby improving the dyeing efficiency and providing the uniformity of the overall color of the dyed wood.

In STEP105, natural drying is necessary because, by soaking, natural drying is necessary in order to reduce the rate of deformation of the wood and promote deeper penetration of the wood stain into the wood interior.

In STEP109, spraying treatment is necessary, firstly, the whole wood tends to be stable after drying, the moisture content is not easy to change greatly, and secondly, the residual amount of the coloring agent generated by spraying on the surface of the wood is far greater than the residual amount by soaking, which is beneficial to improving the color saturation of the surface of the wood. Meanwhile, when spraying, the clam shell powder and the mica powder are required to be added so as to increase the attractiveness of the dyed wood. The clam shell powder and the mica powder can be added only when spraying, and the surface of the wood is exposed in a certain gap after polishing, so that the surface pore of the wood can be blocked to a certain extent by adding the colorant with the clam shell powder and the mica powder through spraying, the light sensation effect of the surface of the wood is improved, a large amount of penetration of moisture into the interior of the wood is reduced, the dimensional stability of the wood is improved, and the drying energy consumption of the later-stage wood is reduced.

In STEP111, high-frequency vacuum drying is employed in order to stabilize the color of the wood surface while improving the flatness of the wood surface by a vacuum drying kiln.

Examples

Wood used: acacia wood with pigment of red color extracted from lignum sappan residue

Dyeing agent: raw materials: 39% by weight of a plant-derived coloring agent, 6% by weight of citric acid, 13% by weight of tannic acid, 3% by weight of potassium acetate, 13% by weight of clam shell powder, 21% by weight of mica powder and the balance of water.

Table 1 actual measurement of plate surface data after dyeing of two templates in the same batch by using a color difference meter

From the data determined in Table 1, it can be seen that the dyed wood color was dark red, the lightness was slightly lower, and the color difference was not large after the same batch of wood was dyed. This indicates that the above-mentioned colorants meet the dyeing requirements.

Compared with the prior art, the wood stain provided by the invention is difficult to use the plant source stain, the citric acid, the tannic acid and the potassium acetate, so that the stain with any color can be obtained, and the environment is protected and the color is close to the natural color due to the use of the plant source stain, thereby improving the similarity of the dyed wood to the natural color and meeting the use expectations of people. The citric acid, the tannic acid and the potassium acetate are added to ensure the quality of the plant-source coloring agent, namely the color of the plant-source coloring agent is not affected, the plant-source coloring agent is not oxidized or deteriorated, and the stability of the color is ensured. In order to increase the aesthetic degree of the wood, the clam shell powder and the mica powder are added, so that the wood has the perception of a flash crystal under illumination, and in order to increase the clam shell powder and the mica powder, the dyeing process is divided into soaking and spraying, and the clam shell powder and the mica powder are added into the dyeing solution only during spraying, so that the required dyed wood is prepared.

The above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions or improvements within the spirit of the present invention are intended to be covered by the claims of the present invention.

Claims (10)

1. A wood stain, characterized by: the wood stain is prepared from the following raw materials, by weight, 35% -71% of plant source stain, 4% -10% of citric acid, 5% -25% of tannic acid, 12% -21% of clam shell powder, 20% -29% of mica powder and the balance of water, wherein the wood is stained by soaking and spraying when in use, and the clam shell powder and the mica powder are added only when in spraying.

2. The wood stain of claim 1 wherein: the preparation raw materials of the wood stain also comprise potassium acetate.

3. The wood stain of claim 2 wherein: the weight percentage of the potassium acetate is less than 7%.

4. The wood stain of claim 1 wherein: when the wood is required to have certain chromatic aberration, the wood stain is free of potassium acetate.

5. The wood stain of claim 1 wherein: the content of the plant-derived coloring agent is 39%.

6. The wood stain of claim 1 wherein: the content of the citric acid is 6%.

7. The wood stain of claim 1 wherein: the content of tannic acid is 13%.

8. The wood stain of claim 1 wherein: the weight percentages of the clam shell powder and the mica powder are 13% and 21%, respectively.

9. A method of using the wood stain of any of claims 1 to 8 comprising the steps of:

STEP101: providing wood to be dyed, and placing the wood in a drying kiln to be dried until the water content is 8% -14%;

STEP102: providing a wood stain according to any one of claims 1 to 8 mixed with a plant-derived stain, citric acid, tannic acid, but not comprising clam shell powder and mica powder;

STEP103: mixing the above materials and forming a solution;

STEP104: soaking the wood in the solution for 6-24 hours;

STEP105: conventionally drying the wood in which STEP104 is soaked with the wood stain;

STEP106: performing surface polishing treatment on the wood after STEP105 is dried;

STEP107: repeating STEP104 to STEP106;

STEP108: providing a spraying device, and spraying a solution formed by adding the clam shell powder and the mica powder into the solution in STEP103 onto the wood treated by STEP106;

STEP109: naturally drying the wood sprayed by STEP 108;

STEP110: repeating STEP108 to STEP109;

STEP111: and drying the wood by adopting a high-frequency vacuum drying mode to finish the dyeing of the wood.

10. The wood stain of claim 9 wherein: the wood stain is prepared from the following raw materials by weight percent of potassium acetate which is less than 7%.