JPH09302278A - Method for binding antibacterial particle, antibacterial agent-containing structure and member, and their production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that, in a conventional process for forming an antibacterial layer on the surface of an article by coating the surface with a coating material contg. antibacterial particles dispersed therein, an inorg. antibacterial agent has such a high specific gravity that it sinks by gravitation into a coating layer before the coating layer dries and solidifies and is thus liable to be buried in the coating layer. SOLUTION: A urethane resin coating film 11 is formed on the surface of an acrylic resin plate 10, and a dispersion prepd. by dispersing antibacterial particles 14 in a thinner 13 for a urethane resin is applied to the surface of the film 11 to form an assistant coating layer 12. The layer 12 dissolves the surface of the film 11. Then the thinner 13 evaporates and the particles 14 are implanted into the film 11 as shown by figure (b).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for binding antibacterial agent particles, a structure having antibacterial agent, a member and a method for producing the same, and more specifically, paper, wood, plastic, gypsum board, asbestos board and others. The present invention relates to a material or member having an improved antibacterial effect by being bonded and fixed to the surface of the material or member while being exposed from the coating film.

[0002]

2. Description of the Related Art With the development of organic and inorganic antibacterial agents,
In recent years, various products using antibacterial agents have been developed. For example, in the case of furniture, it tends to be used not only on the surface of a coating film of furniture, the surface of various printed materials used for furniture, or the surface of a surface plate such as a veneer, but also a decorative sheet.

Conventionally, for example, as a method of providing an antibacterial agent on the surface of furniture, the antibacterial agent particles are dispersed in a paint and applied to the surface of a veneer which is a member constituting the furniture. . According to this method, it is possible to provide an antibacterial agent on the surface of the veneer.

[0004]

However, among the antibacterial agents, inorganic antibacterial agents have a large specific gravity. Therefore, before the coating material dries and solidifies, it settles under the effect of gravity and becomes embedded in the coating material, and the antibacterial agent particles are not exposed on the surface of the coating film, or even if they are exposed, the proportion is low, and the antibacterial agent is not added. However, there is a problem that the antibacterial effect is poor. In order to solve this problem, it is necessary to increase the rate at which the antibacterial agent particles are exposed on the surface of the coating film.

In addition, the coating layer formed on the surface of the furniture is 3
When the thickness is 0 μm or less, there is a problem that the mold which is an organic member, such as a veneer, a veneer, or a paper, has a mold on the surface of the coating film after the product.

Therefore, an object of the present invention is to improve the antibacterial effect by binding the antibacterial agent particles in a state of being exposed on the surface of an object or member. Another object of the present invention is to prevent the generation of mold on the surface of the coating film even when the layer of the coating film formed on the surface of the object or member is 30 μm or less.

[0007]

Means of the present invention taken to achieve the above object are as follows. In the first invention, there is provided a method of binding antibacterial agent particles to the surface of an object,
A step of forming a coating film on the surface of the object, the step of applying a coating film auxiliary element of the coating film mixed with antibacterial agent particles before curing the coating film to the surface of the coating film, This is a method of binding antibacterial agent particles to the surface of an object.

According to a second aspect of the present invention, there is provided a method of binding antibacterial agent particles to the surface of an article, wherein a mildew-proofing agent is applied to the surface of the article and then a coating film is formed on the antifungal agent. Antibacterial agent particles on the surface of an article, the method comprising the steps of: applying a coating film auxiliary element of the coating film mixed with antibacterial agent particles to the surface of the coating film before curing the coating film. Is a method of combining.

In a third aspect of the invention, the coating film auxiliary element of the coating film mixed with antibacterial agent particles is applied when the coating film is in a touch-free or finger-pressure dry state. The method of binding an antibacterial agent to the surface of an article according to the first or second invention.

According to a fourth aspect of the present invention, there is provided a structure having an antibacterial agent, the coating film being formed on the surface of an article, and a large number of antibacterial agent particles implanted on the surface of the coating film. And a structure having an antibacterial agent.

According to a fifth aspect of the present invention, there is provided a structure having an antibacterial agent, the coating film being formed on the surface of a product coated with the antifungal agent, and the state of being planted on the surface of the coating film. A structure having an antibacterial agent, comprising a number of antibacterial particles.

According to a sixth aspect of the present invention, there is provided a member having an antibacterial agent, wherein a coating film formed on the surface of the member and a large number of antibacterial agent particles implanted on the surface of the coating film. And a member having an antibacterial agent.

According to a seventh aspect of the present invention, a member having an antibacterial agent, which is formed on the surface of the member on which the antifungal agent is applied, and a state of being planted on the surface of the film. A large number of antibacterial agent particles, and a member having an antibacterial agent.

According to an eighth aspect of the present invention, there is provided a method of bonding antibacterial agent particles to the surface of a member, which comprises the step of forming a coating film on the surface of the member, and mixing the antibacterial agent particles before curing the coating film. And a step of applying the coating film auxiliary element of the coating film to the surface of the coating film, the method for producing a member having an antibacterial agent.

According to a ninth aspect of the present invention, there is provided a method of binding antibacterial agent particles to the surface of a member, the method comprising the step of forming a coating film on the surface of the member coated with the antifungal agent, before curing the coating film. The method for producing a member having an antibacterial agent, comprising the step of applying the coating film auxiliary element of the coating film containing the antibacterial agent particles to the surface of the coating film.

In the tenth aspect of the invention, the coating film auxiliary element of the coating film mixed with antibacterial agent particles is characterized in that it is applied when the coating film is in the touch-dry or finger-pressure dry state. ,
It is a method for manufacturing a member having an antibacterial agent according to the eighth or ninth invention.

Any article or member according to the present invention may be used as long as a coating film is formed on its surface. The most commonly used items are furniture and buildings, or furniture and building boards,
Examples thereof include a decorative sheet in which a pattern or the like is printed on synthetic resin or paper, a veneer, and the like.

As the paint used in the present invention, there are various known paints. Examples thereof include paints such as urethane resin, aminoalkyd resin, acrylic resin, epoxy resin, lacquer, emulsion resin and the like. The coating film auxiliary element in the present invention is a component which adjusts the viscosity of the coating material and dissolves and dilutes it so that it can be easily coated, and is also referred to as a coating film forming auxiliary element or an evaporation component, and it is a solvent, thinner, water or the like.

Examples of inorganic antibacterial agents include Bactekiller (trademark Kanebo Kasei Co., Ltd.) containing silver (copper) as a main component, Novalon (trademark Toa Gosei Co., Ltd.) containing silver zirconium phosphate as a main component, and silver hydroxyapatite. Apacider (trademark Sangi Co., Ltd.) whose main component is, Ion Pure (trademark Ishizuka Glass Co., Ltd.) whose main component is silver phosphate glass, and antibacterial ceramic whose main component is silver phosphate ceramic (Shinto Kogyo Co., Ltd.) Company).

The size of the antibacterial agent particles is usually from 0.3 μm to
It is in the range of 10 μm. Although not particularly limited, a material having a uniform particle size of 0.5 μm is usually used. When the particle size is small, the particles can be easily dispersed in the coating film auxiliary element. The coating aid element of the coating film and the coating aid element mixed with the antibacterial agent have the same or equivalent function.

As the method of applying the coating film auxiliary element to the surface of the coating film, various coating methods can be mentioned, such as a method using a brush or a roller, a method using a spray gun, and a method using electrostatic coating. The electrostatic coating is suitable when the surface of the member is a curved surface.

The antibacterial effect seems to be exhibited if the amount of the antibacterial agent is 0.2 g to 2.0 g per 1 m ² of applied area. The blending ratio is 20 g to 200 g, preferably 40 g to 100 g of the antibacterial agent per 1000 g of the coating film auxiliary element. The amount applied is ² g to 10 g, preferably 3 g to 6 g per 1 m ² .

Examples of the mildew-proofing agent include Vinazine (trademark of Morton Thiokol Company, USA) and Preventol A4-S (trademark of Bayer Company, Germany).

[0024]

[Action]

(1) The process of forming a coating film on the surface of a plate or a decorative sheet and drying the surface of the coating film, preferably touch-drying (not sticky even if touched with a finger Dry) or Shiatsu dry (not sticky to the touch with your fingers,
After a dry state such that fingerprints do not stick even if pressed a little, the same coating auxiliary element as the coating film mixed with antibacterial agent particles is applied to the surface of the coating film. In addition, when a fungicide-proof function is required, a mildew-proofing agent is applied to the surface of a plate or a decorative sheet, and a coating film is formed thereon.

(2) The surface of the coating film begins to be melted by the coating aid element, but the coating aid element also begins to evaporate. The coating aid element then evaporates and leaves the antimicrobial particles with the lower part planted on the surface of the coating.

That is, unlike the case where the antibacterial agent particles are mixed in the paint, the antibacterial agent particles can be prevented from settling due to gravity, so that the antibacterial agent particles are fixed in an exposed state on the surface of the member and the antibacterial effect is improved. Can be made. Further, since no coating film is formed on the surface of the antibacterial agent particles, the antibacterial effect can be sufficiently exerted.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiments shown in the drawings. FIG. 1 is an explanatory view showing a state in which antibacterial agent particles are planted and bonded on the surface of an acrylic resin plate which is a member of furniture, and FIGS. 2 (a) and 2 (b) are antibacterial agent particles planted in a coating film. FIG. 3 is an explanatory view showing a state of being installed, and FIG. 3 is an explanatory view showing a state in which antibacterial agent particles are implanted and bonded after a mildew-proofing agent is applied to a surface of an acrylic resin plate which is a member of furniture. .

In the figure, reference numeral 10 indicates an acrylic resin plate. A urethane resin coating film 11 is formed on the surface of the acrylic resin plate 10. On the surface of the coating film 11, a layer 12 of a coating film auxiliary element is formed by applying a mixture of antibacterial agent particles 14 in a thinner 13 for urethane resin.
As the antibacterial agent, the above-mentioned Novalon (trademark Toa Gosei Co., Ltd.) is used. When the antifungal function is required, the antifungal agent 15 is applied to the surface of the acrylic resin plate 10 or the plate or the decorative sheet as shown in FIG. 3, and the coating film 11 is formed thereon.

Referring to FIG. Layer 12 of the coating aid element formed on top of coating 11 as shown in (a) is the bottom coating 1
The thinner 13 evaporates while melting the surface of 1. The antibacterial agent particles 14 are in an implanted state in which the lower portion is buried on the dissolved coating film 11 by the action of gravity. After that, the thinner 13 is entirely evaporated and the coating film 11 is dried and solidified to obtain a member in which the antibacterial agent particles 14 are exposed on the surface.

Comparative and Test Examples I. The member obtained by the present invention, the member provided with antibacterial agent particles on the surface, a member obtained by applying a paint containing antibacterial agent particles in the paint, and a member coated with a paint containing no antibacterial agent particles The comparative test of the antibacterial action of The comparison conditions are as follows.

1. Sample: 5 cm × 5 cm × 2.5 mm veneer-bonded plywood Urethane resin coating only Urethane resin (resin content 25%) was applied at 66 g / m ² . No antibacterial agent is mixed. Urethane resin mixed with antibacterial agent and coated Urethane resin (resin content 25%)
The mixture was mixed in a weight ratio of 1.3%, stirred, and then coated at 66 g / m ² . The thickness of the coating film is approximately 15 μm. The amount of the antibacterial agent is 0.8 g per 1 m ^{2 of} area. Implanted antibacterial agent on the surface Urethane resin (resin content 25%) was applied at 66 g / m ² . After touch-drying, the above Novalon was added to 100 g of thinner.
g was mixed and dispersed, and 5.5 g / m ^{2 was} applied to the urethane resin. The amount of the antibacterial agent is 0.7 g per 1 m ^{2 of} area. 2. Test strain: Esherichia coli IFO3301 (E. coli): Staphylococcus aureus (Staphylococcus aureus) 3. Preparation for the test: 1. Medium Normal broth medium (Eiken Chemical Co., Ltd.) Standard agar medium (Eiken Chemical Co., Ltd.) 2. Saline 0.8% sodium chloride (first-grade reagent) aqueous solution 3.1 / 200 NB medium: Normal broth 1/200 the medium with sterile water
The pH is adjusted to 7.0. 4. Container used for the test: Test tube for dilution of bacteria and aluminum cap, Pasteur pipette, 10 ml hole pipette, 100 ml Erlenmeyer flask, silicon stopper, Petri dish 5. Sterilization of instruments and materials used for the test: autoclave sterilization (121 3. C., 20 minutes) Dry heat sterilization (170.degree. C., 30 minutes) 4. Test method: According to the bacterial count measurement method. 1. One platinum loop of the test bacterium was inoculated into 50 ml of sterilized ordinary broth medium and cultured overnight at 37 ° C. The number of bacteria E. coli 1.4 × 10 ⁸ / ml S.aureus 1.5 × 10 ⁸ / ml 2.1. 0.1 ml of the bacterial solution was added to 200 ml of 1/200 NB medium and stirred. Number of bacteria 1 × 10 ^{5 to} 7 × 10 ⁴ 3. 10 ml of 2 was dispensed into a sterile petri dish. Measure the initial number of bacteria. 4. Each test veneer laminated plywood was floated on 3. with the antibacterial side facing down. As a control, also test only the bacterial solution alone. After storing at 5.5 ° C for 24 hours, it was cultured at 37 ° C for 24 hours. 6. The number of viable cells after 24 hours of culture was measured by the pour agar plate culture method using a standard agar medium. (Incubation at 37 ° C for 24 hours)

5. Test results: The test results are as follows. (1) Staph. aureus

[0033]

[Table 1]

(2) E. coli IFO3301

[0035]

[Table 2]

II. Quantitative analysis of silver in antibacterial test liquid The amount of silver, which is a component of the antibacterial agent, was analyzed in the antibacterial test liquid. The results are as follows. 1. Device: ICP-MS HP4500 2. Analysis conditions: Quantification of Ag Quantification by mass number: 107,109, other conditions are described in the data. 3. Sample: Each test solution for antibacterial property test (1 / 200NB medium with test pieces floating) S2-1: S. aureus Painted by mixing with urethane resin 1. E2-1: E.coli Urethane resin Painted by mixing 1. E2-2: E.coli Painted by mixing in urethane resin 2. S3-1: S. aureus One with antibacterial agent planted on the surface 1. S3-2: S. Aureus with antibacterial agent implanted 2. E3-1: E.coli with antibacterial agent implanted 1. E3-2: E.coli with antibacterial agent implanted 2. BLANK: Control bacterial solution 4. Standard reagent: Ag standard solution 1000 ppm (for Wako Pure Chemical Atomic Absorption Analysis) Prepare 10 ppb with ultrapure water and use it as the standard. 5. Test results

[0037]

[Table 3]

As shown in Tables 1 to 3, the member in which the antibacterial agent particles are implanted on the surface of the coating film has a higher antibacterial effect as compared with a member in which the antibacterial agent particles are directly mixed in the urethane resin paint. I understand.

.. III. Next, the antifungal test was conducted on the product coated with the antifungal agent and the product not coated with the antifungal agent. The status of the test is as follows. 1. Manufacture of test pieces The following six test pieces were prepared by using a 5 cm x 10 cm x 2.5 mm veneer plywood with decorative paper as a test piece. [Test piece 1 blank (urethane resin coating film thickness 1
5 μm)] Urethane resin coating (resin content 25%) 66
g / m ² and the film thickness was 15 μm (blank
And). [Test piece 2 Application of organic antifungal agent (preventol)
Post-Urethane Resin Coating] On the surface of the plywood laminated with a decorative paper, 5 g of an organic antifungal agent (Bayer Co .; Preventol A4-S) was dissolved in 100 g of a coating film auxiliary element (thinner) and applied. The coating amount was 5.5 g per 1 m ² of surface area.
66 g / m of urethane resin coating (resin content 25%) after drying
^It was applied in ² . [Test piece 3 Urethane resin coating after application of organic antifungal agent (Binazine)] 5 g of organic antifungal agent (Morton Co .; Vinadine BP-5-2MEK) is applied to the surface of the plywood on the decorative paper as a coating auxiliary element (thinner). It was dissolved in 100 g and then applied. The coating amount was 5.5 g per 1 m ² of surface area.
After drying, urethane resin (resin content 25%) was applied at 66 g / m ² . [Test Specimen 4 Urethane resin mixed with an organic antifungal agent (Binadine)] 5g of an organic antifungal agent (Morton Co .; Vinadine BP-5-2MEK) was mixed with 1250g of a urethane resin on the surface of a plywood laminated with decorative paper. 66 g / m ² after stirring
Was applied. [Test piece 5 Urethane resin coating (film thickness 30 μm or more)] Urethane resin (resin content 25
%) Was applied at 120 g / m ² to a film thickness of 30 μm or more. [Test Piece 6 Urethane Resin Coating, Implanting Surface Inorganic Antibacterial Agent] A urethane resin (resin content 25%) was applied at 66 g / m ² . After drying, an inorganic antibacterial agent was applied at a rate of 0.7 g / m ² .

Antifungal test 2. Test Preparation Preparation of Spore Suspension Two kinds of fungi separated from veneer and veneer plywood were preliminarily subjected to slant culture, and 10 ml of sterilized water was added thereto, followed by shaking and stirring to obtain a spore suspension.

3. Test method Sterilized glass beads and 200 ml of sterilized water were put in a sprayer, 2 ml of the mixed spore suspension was added, and the mixture was stirred well. Anti-mildew test Sprayed on the front and back such that drops fell on the laminated plywood. Each of the test pieces was hung with a wire in a mayonnaise bottle whose bottom was filled with 10 ml of sterilized water, and the lid was lightly covered with an aluminum foil. The cells were cultured for 9 days in Bio-Bazard Safety adjusted to a temperature of 30 ° C. and a humidity of 90%.

The criteria for the antifungal effect in Table 4 are as follows. -: No mold is observed on the sample surface. +1: A slight amount of mildew is observed on a part of the sample surface. +2: The growth of mold is recognized in 1/3 or less of the sample surface. +3: The growth of mold is recognized in 1/2 or less of the sample surface. +4: The growth of mold is recognized on 2/3 or less of the sample surface. +5: Those in which vigorous growth of mold is observed on the entire surface of the sample.

[0043]

[Table 4]

As is clear from Table 4, the antibacterial agent alone does not have an antifungal function, and when the antifungal agent is applied before the formation of the coating film, the antifungal function is obtained even when the thickness of the coating film is 30 μm or less. I know there is. Note that the present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the claims.

[0045]

As is apparent from the above description, according to the present invention, the antibacterial agent particles are bonded to the coating film formed on the surface of the object or member in the implanted state. The upper part of the particles is exposed from the surface of the coating film, and since the coating film is not formed on the surface of the antibacterial agent particles, the antibacterial effect can be exhibited and the antibacterial effect is improved. Although the antibacterial agent alone does not have a mildew-proofing function, when the mildew-proofing agent is applied to an object or member before the coating film is formed, the mildew-proofing force is exhibited even when the thickness of the coating film is 30 μm or less.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a state in which antibacterial agent particles are planted and bonded to a surface of an acrylic resin plate which is a member of furniture.

2 (a) and 2 (b) are explanatory views showing a state in which antibacterial agent particles are implanted in a coating film.

FIG. 3 is an explanatory diagram showing a state in which antibacterial agent particles are implanted and bonded after the antifungal agent is applied to the surface of an acrylic resin plate which is a member of furniture.

[Explanation of symbols]

 10 Acrylic resin plate 11 Coating film 12 Coating film auxiliary element film 13 Thinner 14 Antibacterial agent particles

Claims (10)

[Claims] 1. A method for binding antibacterial agent particles to the surface of an article, the method comprising the step of forming a coating film on the surface of the article, wherein the antibacterial agent particles are mixed before curing the coating film. Applying a membrane aid element to the surface of said coating, a method of binding antimicrobial particles to the surface of an article. 2. A method of binding antibacterial agent particles to the surface of an article, the method comprising the steps of applying a mildew-proofing agent on the surface of an article and then forming a coating film on the anti-molding agent, curing the coating film. A step of applying antibacterial agent particles to the surface of an object, the method comprising the step of applying to the surface of the above-mentioned coating film a coating film auxiliary element of the coating film to which antibacterial agent particles have been previously mixed. 3. The coating auxiliary element of a coating film containing antibacterial agent particles, characterized in that the coating film is applied when the coating film is in a touch-free or finger-pressure dry state. A method of binding an antibacterial agent to the surface of the object. 4. A structure having an antibacterial agent, comprising a coating film formed on the surface of an object, and a large number of antibacterial agent particles implanted on the surface of the coating film.
A structure having an antibacterial agent, comprising: 5. A structure having an antibacterial agent, comprising a coating film formed on the surface of an antifungal agent-coated article, and a large number of antibacterial agent particles implanted on the surface of the coating film. ,
A structure having an antibacterial agent, comprising: 6. A member having an antibacterial agent, comprising a coating film formed on the surface of the member, and a large number of antibacterial agent particles implanted on the surface of the coating film.
A member having an antibacterial agent, comprising: 7. A member having an antibacterial agent, which comprises a coating film formed on the surface of a member coated with an antifungal agent, and a large number of antibacterial agent particles implanted on the surface of the coating film.
A member having an antibacterial agent, comprising: 8. A method for binding antimicrobial agent particles to the surface of a member, the method comprising the step of forming a coating film on the surface of the member, wherein the coating film is mixed with antimicrobial agent particles before the coating film is cured. And a step of applying a film-assisting element to the surface of the coating film. 9. A method for binding antibacterial agent particles to the surface of a member, the method comprising the step of forming a coating film on the surface of a member coated with a fungicide, wherein the antibacterial agent particles are mixed before curing the coating film. And a step of applying a coating film auxiliary element of the coating film to the surface of the coating film, the method for producing a member having an antibacterial agent. 10. The coating auxiliary element of a coating film mixed with antibacterial agent particles is applied when the coating film is in a touch-free or finger-pressure dry state. A method for producing a member having an antibacterial agent.