Deodorizing wooden products

Abstract

To provide a deodorizing wooden product that is harmless to the environment and humans and is made from thinned wood and wood offcuts. [Solution] The deodorizing wooden product 1 is a rectangular cypress or cedar piece of wood made from thinned wood or scrap wood, with numerous slits 2 cut perpendicular to the wood fiber direction at equal intervals of approximately 15 mm on the back side of the wood, each approximately 2 mm wide and approximately two-thirds the depth of the rectangular piece of wood. This increases the specific surface area, and deodorizes bad odors such as ammonia and acetic acid through a chemical reaction, or allows them to be adsorbed onto the surface of the wood.

Description

[Technical Field]

[0001] This invention relates to a deodorizing wooden product. [Background technology]

[0002] Coniferous woods such as cypress and cedar emit a strong fragrance due to the large amount of essential oil components, a group of terpenoid compounds. The odor components are volatile substances contained in essential oils obtained by steam distillation of wood. Most of them are liquid. Their content in wood is very small compared to the major components such as cellulose, hemicellulose, and lignin. These essential oils have antiseptic, insect repellent, waterproofing, and animal repellent effects. These essential oils also act as deodorizers, masking odors with other scents (Non-Patent Document 1).

[0003] The components of the scent of cypress are α-pinene, β-pinene, myrcene, limonene, α-terpineol, and bornyl acetate. The components of the scent of cedar are sesquiterpenes, cryptomeridiol, and cryptomeriol (Non-Patent Document 2).

[0004] The pH of wood is generally expressed as the value of the pH of the water extract of wood measured with a glass electrode pH meter. The pH of most wood is in the weakly acidic range of pH 4 to 6. The pH of Japanese cypress sapwood is 6.8, that of heartwood is 5.3 to 5.4, that of Japanese cedar sapwood is 5.40 to 6.1, and that of heartwood is 6.05 to 6.1 (Non-Patent Document 3).

[0005] Prior art has devised an aromatic, antibacterial material that penetrates from the bottom of the body to the wood, reaching the outer surface at the top. The penetration is filled with a porous wood aggregate, and water is brought into contact with the bottom slit and penetrates into the wood (Patent Document 1). This device requires a lot of work to make and install, as it involves filling the penetration part with a wooden aggregate and bringing water into contact with the cut on the bottom side to allow it to penetrate the wooden part.

[0006] A slit panel has been devised in which numerous concave and convex strips are formed on both sides of a wooden board, leaving a board-shaped uncut section in the middle of the board cross section (Patent Document 2). These slit panels can be joined together to make a building material. Also, by forming concave and convex strips in the direction of the grain of a wooden board and immersing one end in water and setting it upright, it can be used as a decorative wall for fragrancing. In this invention, there is a risk of reducing the strength of the plate material because many uneven stripes are formed on both sides of the plate material.

[0007] A wooden deodorizing and antibacterial material has been invented that has a peripheral surface made of a curved surface formed by cutting, and flat surfaces formed by sawing at both end faces, and a body with a through hole from one end face to the other (Patent Document 3). Forming curved surfaces is technically difficult. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Mito 3195268 [Patent Document 2] Mito 3130145 [Patent Document 3] Patent Publication No. 09-187807 [Non-patent literature]

[0009] [Non-patent document 4] Hiroyuki Imamura et al., eds., "Chemistry of Wood Utilization", Kyoritsu Publishing Co., Ltd. (1986) Summary of the Invention [Problem to be solved by the invention]

[0010] There is a demand for deodorizing materials that are gentle on the environment and humans. Thinned wood and wood scraps contain essential oils and have a slightly acidic pH. Thinned wood and wood scraps were used as deodorizing materials.

[0011] Prior art has devised an aromatic, antibacterial material that penetrates from the bottom of the body to the wood, reaching the outer surface of the top. The penetration is filled with a porous wood aggregate, and water is brought into contact with the bottom slit and allowed to penetrate the wood. This device requires a lot of work to make and install, as it involves making an incision from the bottom of the main body into the wood and penetrating it to the outer surface of the top, filling the penetration with wood aggregate, and then contacting the incision on the bottom side with water to allow it to penetrate into the wood.

[0012] One idea for a slit panel is to create a wooden board with numerous concave and convex strips on both sides, leaving a board-like uncut section in the middle of the board cross section. These slit panels can be joined together to create a building material. Also, by forming concave and convex strips in the direction of the grain of the wooden board and immersing one end in water and setting it upright, it can be used as a decorative wall for fragrances. In this invention, there is a risk of reducing the strength of the plate material because many uneven stripes are formed on both sides of the plate material.

[0013] A wooden deodorizing and antibacterial material has been invented, which has a peripheral surface consisting of a curved surface formed by cutting work and flat surfaces formed by sawing at both end faces, and a body with a through hole from one end face to the other. Forming curved surfaces is technically difficult.

[0014] The present invention has been made to solve the problems that have existed in the past. There is a demand for wooden products that are easy to manufacture, environmentally friendly, harmless to humans, and have deodorizing properties. [Means for solving the problem]

[0015] In order to solve the above problems and achieve the objectives, we have devised the following deodorizing wooden products using thinned wood and wood offcuts.

[0016] The deodorizing wooden product is a rectangular parallelepiped wooden piece with many notches on the back side of the wood, the notches being perpendicular to the direction of the fibers. The deodorizing wooden product of this invention can be placed in toilets, pet toilets, closets, cars, helmets, shoes, futons, etc. to eliminate bad odors.

[0017] This is a deodorizing wooden product in which cuts are made on the back surface of a rectangular parallelepiped wooden piece at equal intervals of about 15 mm, with a width of about 2 mm and a depth of about two-thirds the thickness of the rectangular parallelepiped wooden piece. Normally, wood warps when the front side is concave and the back side is convex, but by making cuts (slits) on the back side of the wood as in this invention, warping can be prevented. The core wood on the underside of the wood contains more essential oils than the surface. Therefore, cuts are made in the core wood on the underside of the wood to increase the surface area. This increases the specific surface area, which increases the degree to which odorous components come into contact with the wood surface and also increases the evaporation of essential oils.

[0018] The large deodorizing wooden product is 12 cm wide, 24 cm long, and 3 cm thick, with 15 notches on the underside of the wood (Figure 1). The medium deodorizing wooden product is 12 cm wide, 12 cm long, and 3 cm thick, with 6 notches on the underside of the wood (Figure 2). The small deodorizing wooden product is 3.5 cm wide, 12 cm long, and 3 cm thick, with 6 notches on the underside of the wood (Figure 3). All notches (slits) are made perpendicular to the grain direction.

[0019] This is a rectangular wooden product with deodorizing properties, made of Japanese cypress and cedar. The pH of cypress sapwood is 6.8, the heartwood is 5.3-5.4, while the pH of cedar sapwood is 5.40-6.1, and the heartwood is 6.05-6.1. Because the pH of wood is weakly acidic, it chemically reacts with odorous ammonia and amine compounds to neutralize them. It is thought that the deodorization of acetic acid is due to absorption by the wood. The components of the scent of cypress are α-pinene, β-pinene, myrcene, limonene, α-terpineol, and bornyl acetate. The components of the scent of cedar are sesquiterpenes, cryptomeridiol, and cryptomeriol. These fragrances act as deodorizers by masking bad odors. [Effects of the Invention]

[0020] We have developed deodorizing wooden products using thinned wood and wood offcuts. These products are natural, harmless to the environment and humans, and are easy to make. Furthermore, using thinned wood helps protect forests. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a schematic perspective view of a large deodorizing wooden product according to the present invention; [Figure 2] 1 is a schematic perspective view of a deodorizing wooden product according to the present invention; [Figure 3] 1 is a schematic perspective view of a small deodorizing wooden product according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0022] Examples of the present invention are given below, but the present invention is not limited to the following examples. [Example]

[0023] FIG. 1 is a schematic perspective view of a large deodorizing wooden product (1) of the present invention. This deodorizing wooden product has cuts (2) on the back surface (3) of a rectangular parallelepiped wooden piece, spaced at equal intervals of about 15 mm, with a width of about 2 mm and a depth of about two-thirds the thickness of the rectangular parallelepiped wooden piece. A deodorizing test was conducted using the large wooden product (1) we invented (tested at the Wakayama Prefectural Industrial Technology Center). Ammonia was used as the odor-causing component. The ammonia was used as an ethanol solution. For the large deodorizing wooden product (1), a 10-liter glass desiccator was used, with a metal middle plate on which the sample was placed. The malodorous components were placed in a glass watch glass placed under the middle plate. The residual concentration was measured using a detector tube. The removal rate (%) was calculated using the formula: Removal rate (%) = (blank - test value) / blank x 100. The blank was a measurement value obtained by adding only the malodorous components to an empty desiccator without adding any sample. Test results 1% ammonia ethanol solution 0.1 ml 2 hours later 99% removal rate 5% ammonia ethanol solution 0.1 ml 2 hours later 99% removal rate The ammonia odor component was removed by 99%. Ammonia reacts with the weak acidic components of wood and becomes odorless. [Example]

[0024] FIG. 2 is a schematic perspective view of the deodorizing wooden product (6) of the present invention. A deodorizing test was conducted using the wooden product (6) developed (tested at the Wakayama Prefectural Industrial Technology Center). Ammonia and acetic acid were used as odor-causing components. Ammonia was used as an ethanol solution. Acetic acid was used as an aqueous solution. The deodorizing function of the wooden product (6) was measured using a 6-liter glass desiccator with a metal middle plate, on which the sample was placed. The malodorous components were placed in a glass watch glass placed under the middle plate. The residual concentration was measured using a detector tube. The removal rate (%) was calculated using the formula: Removal rate (%) = (blank - test value) / blank x 100. The blank was a measurement value obtained by adding only the malodorous components to an empty desiccator without adding any sample. Test results: Grade 1 1% acetic acid solution 0.5 ml 2 hours later 90% removal rate 2% acetic acid solution 0.5 ml 2 hours later 94% removal rate 4% acetic acid solution 0.5 ml 2 hours later 91% removal rate More than 90% of the acetic acid malodor component was removed. It is believed that acetic acid is physically adsorbed onto the wood surface. Test results: 2nd year 1% ammonia ethanol solution 0.1 ml 2 hours later 95% removal rate 0.1 ml of 1% ammonia ethanol solution: 4 hours later, removal rate: 95% 0.1 ml of 1% ammonia ethanol solution: 6 hours later, removal rate: 95% 0.1 ml of 1% ammonia ethanol solution: 8 hours later, removal rate: 95% The ammonia malodor component was removed by 95%. Ammonia reacts with the weak acidic components of wood and becomes odorless. Test results: 3rd year 1% ammonia ethanol solution 0.5 ml 2 hours later 99% removal rate 0.5 ml of 1% ammonia ethanol solution: 4 hours later, removal rate: 99% 0.5 ml of 1% ammonia ethanol solution: 6 hours later, removal rate: 99% 0.5 ml of 1% ammonia ethanol solution: 8 hours later, removal rate: 99% The ammonia malodor component was removed by 99%. Ammonia reacts with the weak acidic components of wood and becomes odorless. Exam results: 4th grade 5% ammonia ethanol solution 0.1 ml 2 hours later 98% removal rate 0.1 ml of 5% ammonia ethanol solution: 4 hours later, removal rate 98% 0.1 ml of 5% ammonia ethanol solution: 6 hours later, removal rate 98% 0.1 ml of 5% ammonia ethanol solution: 8 hours later, removal rate 98% The ammonia malodor component was removed by 98%. Ammonia reacts with the weak acidic components of wood and becomes odorless. [Example]

[0025] FIG. 3 is a schematic perspective view of a small deodorizing wooden product (7) of the present invention. A deodorizing test was conducted using the wooden product (7) developed (tested at the Wakayama Prefectural Industrial Technology Center). Ammonia and acetic acid were used as odor-causing components. Ammonia was used as an ethanol solution. Acetic acid was used as an aqueous solution. For small deodorizing wooden products (7), a 6-liter glass desiccator was used, with a metal middle plate on which the sample was placed. The malodorous components were placed in a glass watch glass placed under the middle plate. The residual concentration was measured using a detector tube. The removal rate (%) was calculated using the formula: Removal rate (%) = (blank - test value) / blank x 100. The blank was a measurement value obtained by adding only the malodorous components to an empty desiccator without adding any sample. Test results: Small - 1 1% acetic acid solution 0.5 ml 2 hours later 83% removal rate 2% acetic acid solution 0.5 ml 2 hours later 89% removal rate 4% acetic acid solution 0.5 ml 2 hours later 79% removal rate The acetic acid malodor component was removed by more than 79%. It is believed that acetic acid is physically adsorbed onto the wood surface. Test results: Grade 2 1% ammonia ethanol solution 0.1 ml 2 hours later 98% removal rate 0.1 ml of 1% ammonia ethanol solution: 4 hours later, removal rate: 98% 0.1 ml of 1% ammonia ethanol solution: 6 hours later, removal rate: 98% 0.1 ml of 1% ammonia ethanol solution: 8 hours later, removal rate: 98% The ammonia malodor component was removed by 98%. Ammonia reacts with the weak acidic components of wood and becomes odorless. Test results: Grade 3 1% ammonia ethanol solution 0.5 ml 2 hours later 99% removal rate 0.5 ml of 1% ammonia ethanol solution: 4 hours later, removal rate: 99% 0.5 ml of 1% ammonia ethanol solution: 6 hours later, removal rate: 99% 0.5 ml of 1% ammonia ethanol solution: 8 hours later, removal rate: 99% The ammonia malodor component was removed by 99%. Ammonia reacts with the weak acidic components of wood and becomes odorless. Test results: Grade 4 5% ammonia ethanol solution 0.1 ml 2 hours later 98% removal rate 0.1 ml of 5% ammonia ethanol solution: 4 hours later, removal rate: 99% 0.1 ml of 5% ammonia ethanol solution: 6 hours later, removal rate: 99% 0.1 ml of 5% ammonia ethanol solution: 8 hours later, removal rate: 99% The ammonia malodor component was removed by 99%. Ammonia reacts with the weak acidic components of wood and becomes odorless.

[0026] The invention of large, medium and small deodorizing wooden products has been described above, but performance can be improved by making small improvements to each part. [Industrial Applicability]

[0027] As mentioned above, this is a deodorizing wooden product made from thinned wood and wood scraps, and has rectangular pieces of wood with slits on the back side of the wood, spaced at equal intervals of approximately 15 mm, each approximately 2 mm wide and approximately two-thirds the depth of the rectangular piece of wood. This invention is a wooden product that is easy to make, is harmless to the environment and humans, and uses thinned wood. The use of thinned wood promotes forest management and prevents forest degradation. [Explanation of symbols]

[0028] 1. The most effective deodorizing wooden product 2 Cutout 3 Back of the tree 4 annual rings 5 Wood surface 6. Deodorizing wooden products 7 small deodorizing wooden products

Claims

1. The deodorizing wooden product is characterized in that a rectangular parallelepiped wooden piece has many notches on the back side of the wood, the notches being perpendicular to the direction of the grain.

2. The deodorizing wooden product according to claim 1, characterized in that the rectangular lumber has notches on the back surface of the wood at equal intervals of approximately 15 mm, with a width of approximately 2 mm and a depth of approximately two-thirds the thickness of the rectangular lumber.

3. 3. The deodorizing wooden product according to claim 1, wherein the rectangular parallelepiped wooden material is made of Japanese cypress or Japanese cedar.

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