KR20130080991A - Natural dyeing method for wood products using pine tree bark extract and the natural dyed wood products thereby - Google Patents

Abstract

PURPOSE: A natural dye method of timber is provided to manufacture excellent natural dye timber with high durability in an economical and a simple method. CONSTITUTION: Natural dye is extracted from white pine by using mixed liquid generated by mixing water, ethanol, methanol, ethyl acetate, and ferment alcohol. The timber is dyed with the extracted natural dye extract. Solvent is fermentation solution including ethanol concentration of 95 % ( v/v) to 1 % ( v/v). The rate of solvent and white pine bark is a volume ratio of 1 to 3 or 1 to 50. The timer is immersed in the dye during 72 hours by controlling the temperature of the extract.

Description

Natural dyeing method for wood products using pine tree bark extract and the natural dyed wood products hence}

The present invention relates to a natural dyeing method of woods using pine bark extract and natural dyeing wood prepared by the method, specifically, a solution selected from water, ethanol, methanol, ethyl acetate and fermentation alcohol or mixed solution of two or more solvents Extracting the natural dye from the pine bark using as; And dyeing wood with the extracted natural dye extract.

Natural dyeing means dyeing using materials obtained from nature. There are plant dyeing method, animal dyeing method and mineral dyeing method, and plant dyeing method is mainly used to extract and dye water-soluble dyes from plants. Plant dyeing is a method of extracting and dyeing pigments contained in the leaves, flowers, berries, shells, heartwood, roots, etc. of plants, and animal dyeing is a method of dyeing with cochineal, kermes, violet shells, and gall bladder. Dyeing method after making the pigment using silver mineral powder or loess, and so far known dyeing method mainly for fibers and textile products.

Natural dyeing has a merit of obtaining a natural and subtle color because it is dyed by collecting dyeing materials from nature, but has a disadvantage of low durability such as poor dyeing and fading colors over time. Therefore, in order to increase the dyeability and durability, it is often treated with mordant, salt, iron salt, copper salt, glue, etc. as a mordant during the dyeing process. There is a problem that the process is complicated and a large amount of environmental polluted water may occur. In addition, most natural dyeing methods have low salt concentrations. Since the dyeing material is composed mostly of water-soluble components, the dyeing must be repeated several times in order to obtain a desired color, there is a high labor cost and low productivity.

Nevertheless, the natural dyeing method has almost no harmful effects to human body compared with the use of chemical dyes, and the natural dyeing material has various physiologically active effects (antibacterial, anti-inflammatory, deodorizing, etc.) to improve the safety of the living environment and the quality of life. Many people prefer it because it helps to promote health. Natural dyeing is also an environmentally friendly dyeing method by releasing less water and air pollutants than chemical dyeing.

On the other hand, due to the increase of various diseases such as headache, fatigue, dyspnea, asthma, rhinitis, dermatitis, etc. due to the harmful substances generated from building materials and furniture in the house, such as sick house syndrome, Consumers' interest in safety is increasing. Conventional natural dyeing method of wood is lacquer dyeing method, but the price of natural lacquer dye is very expensive, dyeing process is very cumbersome such as maintaining specific temperature and humidity, and impermeable film is formed on the surface of wood. Therefore, there is a limit to the popular application of lacquer dyes to wood or woodworking products due to low breathability. Therefore, there is a need for a natural dyeing method that can be applied to the wood more economical, simple and versatile.

The present inventors, while trying to develop a new natural dyeing method that can solve the problems of the prior art, became interested in the pine bark as the extraction target of natural dyes.

Pine is mainly used as wood, pulp and fuel, but pine bark is produced as a by-product, and only a part of it is used for fuel, compost, horticulture, and decoration. It was determined that the present invention would be suitable for the natural dyeing intended to be achieved.

As a result of intensive research to develop a natural dyeing method for wood using pine bark, natural dyes are extracted from pine bark under certain conditions using solvents such as water, ethanol, methanol, ethyl acetate, fermentation spirits, and When used in the dyeing, excellent dyeing and durability, not only can be produced natural dyeing wood, which is beneficial to the human body, but also confirmed that the manufacturing process is very easy and economical to complete the present invention.

Accordingly, a main object of the present invention is to use a natural dyeing method for dyeing wood, and to provide a method for dyeing wood, which is economical and simple, and has excellent dyeing and durability.

Another object of the present invention to provide a wood of various uses dyed by the wood dyeing method.

According to an aspect of the present invention, the present invention comprises the steps of extracting a natural dye from pine bark (pine bark) using a solution selected from water, ethanol, methanol, ethyl acetate and fermentation alcohol or two or more mixed solutions as a solvent; And dyeing wood with the extracted natural dye extract.

Pine tree in the present invention is defined as a plant belonging to the pine family, specifically Red pine (Pinus densiflora Sieb & Zucc.), Sea pine (Pinus thumbergii Parlatore), Pinus densiflora Sieb. & Zucc. For.erecta Uyeki , Pinus radiata D. Don, Pinus taeda Linne, Pinus sylvestris L., Pine pine, Cupressus Sempervirens, Casuarina equisetifolia JR & G. Forst., Casuarina litorea L. Casuarinaceae or Himalayan pine (Abies pindrow) can be exemplified.

Bark also refers to bark that can be obtained from trunks and branches, except for the leaves or roots of plants, and pine bark is commonly called pine bark.

In addition, the alcohol solution or fermentation alcohol referred to in the present invention is defined as a fluid liquid of the ethanol main component fermenting the food material containing starch or the food material containing sugar (糖分).

Pine bark may be obtained from harvested pines by hand or by machine, and may be pulverized with a pulverizer to prepare a particle or powder and then used in an extraction step.

As the extraction solvent, a solution selected from water, ethanol, methanol, ethyl acetate, and fermentation spirit or two or more mixed solutions may be used, but in order to efficiently extract natural dyes, fermentation with an ethanol concentration of 1 to 95% (v / v) It is preferable to use a spirit solution as a solvent. More preferably, a fermentation alcohol solution having an ethanol concentration of 30 to 95% may be used as a solvent.

The ratio of the pine bark and the solvent in the natural dye extracting step may be 1: 3 to 1:50 by volume, preferably 1: 5 to 1:20. This is because when the ratio of the solvent is low, it is difficult to extract the natural dye sufficiently, and when the ratio of the solvent is high, the concentration of the natural dye extracted from the natural dye extract is lowered. Concentrate the extract to increase the concentration of natural dyes in the extract, but when extracted in the ratio can be used for dyeing the extract as it is.

The natural dyes can be extracted from the pine bark by mixing the pine bark with the solvent and by standing still, intermittent mixing or continuous mixing. At this time, the extraction temperature is -20 ~ 90 ℃, preferably 10 ~ 70 ℃, extraction time can be 10 minutes to 3 days, preferably 30 minutes to 24 hours.

When the extraction of the lead dye is completed, the extract and the bark may be separated using a known method such as filtration or centrifugation in order to separate the extract from the bark.

After filtration, the alcohol solution is mixed in the bark filtration foil 1 to 20 times, preferably 5 to 15 times compared to the filtration foil may be used to extract the natural dye remaining in the filtration foil 1 to 2 times more.

The filtered natural dye extracts can be collected together and used after concentration, or can be used in the next dyeing process without being concentrated.

The natural dye extract obtained through the extraction step may be dyed by immersing the wood for a predetermined time to partially dye even the inside of the wood or by applying the natural dye extract to the surface of the wood using a paint sprayer or the like. In the case of using the immersion method, the immersion time may be 0.1 minutes to 72 hours, preferably 5 minutes to 36 hours, and the temperature of the natural dye extract may be 0 to 90 ° C, preferably 30 to 70 ° C. Can be. At this time, intermittent mixing and flipping may be performed for uniform dyeing of wood.

When the dyeing is completed, the dyed wood is separated from the natural dye extract, dried at room temperature or high temperature, and repeated several times as needed to obtain a darker color.

Some water-soluble substances and excess dyes remaining on the surface of the wood after the dyeing step are removed with water or a wet towel, and if necessary, the color of the dyed wood is thickened by applying natural oil such as soybean oil or perilla oil. Waterproofness can be improved.

The present invention is characterized in that the natural dye extracted from pine bark (pine bark) is used for dyeing wood.

Pine bark extract according to the present invention contains polyphenols, proteins, rosin, fragrances and the like, and exhibits high dyeing and durability even without the use of additional mordant. In addition, the polyphenol component contained in pine bark extract has various physiological activities that are beneficial to the human body such as antioxidant activity, blood circulation effect, anti-inflammatory effect, antibacterial effect, skin beauty effect, deodorizing effect, etc. Unlike the chemicals that cause allergies, the natural dye products processed with this extract have almost no irritation to the skin and can improve skin diseases. Thus, the wood dyeing method of the present invention provides various well-being products that are naturally friendly. It has the strength to do it.

According to the present invention, it is possible to manufacture natural dyeing wood with high dyeing property and durability in an economical and convenient way, the natural dyeing wood prepared according to the present invention is allergic to harmful gases generated from the existing building interior materials and furniture It can solve the problems of sick house syndrome such as asthma, dermatitis and atopic dermatitis, thereby improving the quality of life of consumers.

In addition, the dyeing method according to the present invention is an environmentally friendly method with no generation of harmful pollutants and minimizes the generation of carbon dioxide, and because of the natural dyeing material extracted from the pine bark, natural texture, high dyeability and It can exhibit durability and makes it possible to manufacture various natural dyeing products with excellent practicality.

And it is possible to manufacture a large amount of dyed wood by a simple dyeing method, so the possibility of practical use is very high.If developing natural dyeing products applied to various woods, added value of pine trees, income of forest farmers, wood industry, building industry, It can greatly contribute to the development of household goods industry and well-being health industry.

In addition, pine bark extract contains physiologically active substances such as polyphenols, and thus exhibits the effects of anti-oxidation, blood circulation, anti-inflammatory, antibacterial, skin beauty, and the like, and is a natural dyeing product dyed according to the method of the present invention. It is a natural, health-oriented well-being product that not only has little irritation to the skin but can also contribute to the healing and prevention of skin diseases and atopy. Therefore, by providing such a product can contribute to the improvement of the health of the consumer, it will be able to contribute to the improvement of the international balance by exporting the differentiated natural dyes and natural dye products derived from domestic pine to overseas.

1 is a photograph of a natural dyed pine board prepared according to the present invention.
Figure 2 is a photograph of a natural dyed cypress board prepared according to the present invention.
Figure 3 is a photograph of natural dyed Hongsong chopping board prepared according to the present invention.
Figure 4 is a photograph showing the state after using the natural dyed pine board produced in accordance with the present invention with a chopping board for 2 years.

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are only for illustrating the present invention, and the scope of the present invention is not to be construed as being limited by these examples.

Example  One.

The shells were collected from 50-year-old red pine (Pinus densiflora Sieb & Zucc.) Harvested in Gangneung, Gangwon-do, Korea, and passed through a mill to prepare 10 kg of crushed products. 80 grams of fermented alcoholic solution containing 40% water and 60% ethanol was mixed with 10 kg of pine bark crushed, and then extracted for 6 hours while intermittently mixing in a constant temperature water bath heated to 70 ° C. L was obtained. 50 L of the natural dye extracts were taken to adjust the temperature to 50 ° C., and the pine board material (30 cm × 20 cm × 3 cm) was immersed and then dyed for 24 hours while stirring intermittently. After the dyeing is completed, the dyed pine boards were taken out and the natural dye solution remaining on the surface was removed with a towel, and the dyed boards were dried at room temperature for 24 hours to complete the final natural dyed pine boards (see FIG. 1).

Example 2.

Except for using the fermentation alcohol solution in Example 1 60% ethyl acetate solution was carried out in the same manner.

Example 3.

Except for using the purified water instead of fermentation alcohol solution in Example 1 was carried out in the same manner.

Example 4.

Except for using the fermentation alcohol solution in Example 1 60% methanol solution was carried out in the same manner.

Example 5.

Except for using the birch board instead of pine board in Example 1 was carried out in the same manner.

Example 6.

Except for using a cypress board instead of pine board in Example 1 was carried out in the same manner (see Figure 2).

Example  7.

Except for using the pine board material processed with a cutting board instead of pine board in Example 1 was carried out in the same manner (see Figure 3).

Example  8.

Except for using a paulownia wood board instead of pine board in Example 1 was carried out in the same way.

Example  9.

Except for using the attention wood board instead of pine board in Example 1 was carried out in the same way.

Example  10.

Except for using the pine pine (Pinus thunbergii) in Example 1 was carried out in the same manner.

Example  11.

Except for using pine radish pine (Pinus radiata) instead of red pine in Example 1 was carried out in the same manner.

Example  12.

After obtaining the primary natural dye extract in Example 1, 50 liters of fermented alcoholic solution containing 60% ethanol in the filter foil was combined and extracted for 2 hours with intermittent mixing in a constant temperature water bath heated to 70 ℃ and then filtered 49 L of a secondary natural dye extract was obtained. The primary extract and the secondary extract were combined to obtain a total of 114.8 L of natural dye extract, which was carried out in the same manner as in Example 1 using the salt solution.

Example  13.

The natural dyed pine board prepared in Example 1 was further dyed twice using the same method as Example 1 with 20 L of natural dye extract.

Example  14.

Coating a small amount of perilla oil with a towel on the natural dyed pine board prepared in Example 1 to prepare a pine board having a darker color and a higher waterproof.

Example  15.

The natural dyeing pine board prepared in Example 1 was used as a kitchen chopping board for 2 years to confirm the durability of the natural dyeing (see Figure 4).

Claims (5)

Extracting a natural dye from pine bark using a solution selected from water, ethanol, methanol, ethyl acetate and fermentation alcohol or two or more mixed solutions as a solvent; And
Dyeing wood with the extracted natural dye extract. The method of claim 1, wherein the solvent
Wood dyeing method characterized in that the fermentation alcohol solution with an ethanol concentration of 1 to 95% (v / v). The method of claim 1, wherein the ratio of the pine bark and the solvent is 1: 3 to 1:50 by volume ratio. The method of claim 1, wherein the dyeing
The temperature of the extract is 0 to 90 ℃ wood dyeing method, characterized in that made by immersing the wood for 0.1 minutes to 72 hours. Wood produced by the method of claim 1.

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