JP3235649U - Antibacterial tile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antibacterial tile having antibacterial properties and far-infrared radiation characteristics. An antibacterial tile 1 includes a substrate 11, a slip layer 12, a base glaze layer 13, and an antibacterial glaze layer 14. The slip layer covers the surface of the substrate, the base glaze layer covers the slip layer, and the antibacterial glaze layer covers the base glaze layer. Water and the antibacterial glaze are mixed in a weight ratio of 5-6: 4-5 with respect to the antibacterial glaze in which the surface glaze and the antibacterial material are mixed in a weight ratio of 100: 5-10, and further pulverized. The antibacterial glaze is used as an antibacterial glaze, and the antibacterial glaze is scattered on the base glaze layer, sprayed or poured to provide an antibacterial glaze layer on the base glaze layer. The antibacterial tile has an antibacterial rate of 99.9% or more in 24 hours when the antibacterial tile is fired at 1000 to 1600 ° C. [Selection diagram] Fig. 1

Description

The present invention relates to antibacterial tiles, such as antibacterial tiles having properties such as antibacterial properties and far infrared radiation.

If people want a good living environment, they must first prevent and effectively control the growth of bacteria in their surroundings. In this regard, with the development of nanomaterials, for example, nanophotocatalytic particles having antibacterial properties have come to be widely used in daily necessities. That is, the photocatalyst is irradiated with light to generate hydroxyl radicals, and the high oxidizing ability of hydroxyl radicals denatures proteins of bacteria and viruses to exert a bactericidal effect.

Because tiles are long trampled, touched, and contaminated with various dusts, tiles inside and outside the house are heavily infected with bacteria and viruses. Therefore, by combining nanomaterials and tiles, such as adding antibacterial action using photocatalyst to tiles, it is useful for disinfecting and purifying the environment. In an environment where various viruses appear as it is today, a safe and hygienic space is required in places where environmental hygiene requirements are high.

Nanomaterials currently in use require multiple filtration, cleaning, evaporation, decomposition, and other steps to remove impurities produced during the manufacturing process. In addition, since the manufacturing process is complicated, the equipment and installation space are large, the cost is high, the entire manufacturing cycle is long, and the stability of quality control is poor. In addition, the generated waste pollutes the environment and increases processing costs and energy consumption.

In view of the above, the creators of this practical proposal seek to invest a lot of energy and spirit in research and development, break through the conventional process framework with innovative thinking, and solve the conventional shortcomings. , Has made constant breakthroughs and innovations in this area. And not only will we use new technological means to bring more to society, but safe and superior products will also promote the development of industry.

The main purpose of the present invention is to provide antibacterial tiles.
The antibacterial material used in the antibacterial tile is a ceramic glaze, which retains excellent antibacterial ability and far-infrared radiation-like properties after firing at 1000-1600 ° C.
The manufacturing process is simple, low cost, pollution-free, and can be industrialized and continuously automated, so stable product quality can be achieved.

In order to achieve the above object, the present invention has an antibacterial substance having a substrate, a slip layer covering the substrate, a base glaze layer covering the slip layer, and an antibacterial glaze layer covering the base glaze layer. It is a tile.
Then, the surface glaze and the antibacterial material are mixed at a weight ratio of 100: 5-10 to make an antibacterial glaze. Next, water and the antibacterial glaze are mixed in a weight ratio of 5-6: 4-5 and further pulverized. At this time, the specific gravity of the antibacterial glaze is adjusted to 1.30 to 1.50. The antibacterial glaze layer is provided on the base glaze layer by interspersing, spraying or spraying the antibacterial glaze on the base glaze layer.

In the antibacterial tile of the present invention, the antibacterial material is a coated nano-zinc oxide powder, a coated nano-copper oxide powder, or a mixture of a coated nano-zinc oxide powder and a coated nano-copper oxide powder.

In the antibacterial tile of the present invention, the nanozinc oxide powder coated with the antibacterial material is formed by coating the nanozinc oxide powder with silica sol.
Further, the coated nano-copper oxide powder is formed by coating the nano-copper oxide powder with sand.
Note that sand is a collection of extremely fine or finely crushed stones, which may be natural rocks, etc., and the composition is not particularly limited, but as a general rule, sand is rich in silicon. Examples include siliceous rocks and those derived from felsic rocks rich in silicon and aluminum. However, it does not exclude mafic or calcareous rock-derived sand. A sol of fine sand may be added to the copper oxide suspension and coated with sand in steps such as precipitation, filtration, drying, pulverization, and baking. Alternatively, it may be coated with silica (silica sol) in the same manner as the nanozinc oxide powder.

In the antibacterial tile of the present invention, the antibacterial rate of the antibacterial tile against Escherichia coli is 99.9% or more.

In the antibacterial tile of the present invention, the antibacterial rate of the antibacterial tile against Staphylococcus aureus is 99.9% or more.

In the antibacterial tile of the present invention, the average particle size (average particle size) of the nano-zinc oxide powder is 2 to 45 nanometers, the specific surface area is 70 to 130 square meters / g, and the average particles of the nano-copper oxide powder. The size (average particle size) is 30 to 35 nanometers, and the specific surface area is 150 to 180 square meters / g.

In the antibacterial tile of the present invention, the average particle size of the particles of the silica sol of the antibacterial material is 4 nm-5 nm.

It is a schematic sectional view of the antibacterial tile of this invention. It is a flowchart of the manufacturing method of the antibacterial tile of this invention.

The following is a specific example for explaining the implementation of the present invention. Those skilled in the art who are familiar with this technique will be able to easily understand the other advantages and effects of the present invention from the contents disclosed herein. Also, the invention can be implemented or applied by other different specific embodiments, and various modifications and modifications can be made without departing from the spirit of the invention.

See FIG.
FIG. 1 is a schematic cross-sectional view of the antibacterial tile of the present invention.

As shown in FIG. 1, the present invention is an antibacterial tile 1, which includes a substrate 11, a slip layer 12, a base glaze layer 13, and an antibacterial glaze layer 14.
The slip layer 12 covers the surface of the substrate 11. The base glaze layer 13 covers the slip layer 12. The antibacterial glaze layer 14 covers the base glaze layer 13.
The surface glaze and the antibacterial material are mixed in a weight ratio of 100: 5-10 to form an antibacterial glaze. Next, water and the antibacterial glaze are mixed in a weight ratio of 5-6: 4-5 and ground to adjust the specific density to 1.30-1.50.
The antibacterial glaze is interspersed, sprayed or poured onto the base glaze layer to form the antibacterial glaze layer 14. Dotted is like, for example, applying an antibacterial glaze on a base glaze layer at a plurality of points in a dense or coarse dot shape at intervals from each other.
In one embodiment, 8-12 g of glaze is applied in a size of 20 x 20 cm, the antibacterial glaze is sprayed on the base glaze layer of the semi-finished product, and after the antibacterial effect is obtained, it is stored on a trolley, for example. Then, it is fired in a kiln.
The antibacterial material is composed of a coated nano-zinc oxide powder, a coated nano-copper oxide powder, or a mixture of a coated nano-zinc oxide powder and a coated nano-copper oxide powder.
The coated nanozinc oxide is formed by coating the nanozinc oxide powder with silica sol. The coated nano-copper oxide powder is formed by coating the nano-copper oxide powder with sand.
Coating techniques for coating nanocopper oxide powder can achieve two effects.
First, it is difficult to oxidize.
Although nanocopper oxide is a metal, it is relatively non-hazardous and relatively safe after coating.
After coating, nanocopper oxide does not affect the release of copper ions. This is because it is derived from the original oxidative properties of copper ions and has unique electron affinity properties and bonding strength.
Also, the sand used in the coating technique has two advantages.
The first is to use sand coating technology to protect the properties of nanocopper oxide. In general, uncoated nanocopper oxides become cuprous oxide at high temperatures of about 1100 ° C. And the second advantage is that the continuation of oxidation can be prevented and the raw material can be made more stable.
The average particle size (average particle size) of the nanozinc oxide powder is 2 to 45 nanometers, and the specific surface area is 70 to 130 square meters / g. The average particle size of the nanocopper oxide powder is 30 to 35 nanometers, and the specific surface area is 150 to 180 square meters / g. The particle fineness (average particle size) of the silica sol is 4 to 5 nanometers.
The average particle size may be obtained by confirming the sampled several times with a microscope and calculating the average particle size by statistical processing, or by a light scattering method (laser diffraction / scattering method). Let's do it.

See FIG. FIG. 2 is a flowchart of the method for manufacturing an antibacterial tile of the present invention.

As shown in FIG. 2, the method for producing an antibacterial tile of the present invention comprises the steps of providing a tile body, forming an antibacterial glaze, and firing.
Here, the steps of providing the tile body include:
The soil material is crushed into a slurry, the slurry is dried into powder with hot air, and the powder is used as a substrate by a molding machine.
A cosmetic glaze (slip) is scattered, sprayed, or poured (sprinkled) on the surface of the substrate to form a slip layer. Then, the glaze slurry is scattered on the cosmetic soil layer, sprayed, or poured (sprinkled) to form a base glaze.
Specifically, 20-30 wt% clay, 60-70 wt% feldspar, 5-10 wt% sand are crushed into slurries and polished with medium and high alumina balls for 10-11 hours (eg steel). ) For 18 to 19 hours.
The test standard specific gravity is 1.72 ± 0.02, the residue is 1.0 g ± 0.3 g, and the viscosity is 300 cps ± 100 cps. If the test is ineligible, adjust to pass before draining the slurry.
Next, the slurry is pumped into a spray tower and made into a mist by high pressure, and the temperature inside the tower is in the range of 570 to 650 ° C. The liquid moisture content of the slurry is 32 to 35%, and it is instantly dried to 5.5 to 6.5% at high temperature to generate granular particles, which are transported to a powder bucket for storage.
The powder is molded at a high pressure of 300-400 kgf / cm ² and the bending resistance before baking is adjusted to ^{12-20 kgf / cm 2.} It is then taken to a vertical drying chamber for glaze application.
As an example, a tile having a size of 20 × 20 cm is taken as an example. First, a glaze (glaze as a slip) having a specific gravity of 1.50 to 1.60 and a weight of 18 g to 21 g is spread. Further, a glaze having a specific gravity of 1.55 to 1.65 and a weight of 18 g to 21 g is applied on the above-mentioned cosmetic soil.

Next, the surface glaze and the antibacterial material are mixed in a weight ratio of 100: 5-10 to form an antibacterial glaze. Next, water and the antibacterial glaze are mixed in a weight ratio of 5-6: 4-5 and ground to adjust the specific density to 1.30-1.50. The base glaze layer is interspersed, sprayed, or poured with antibacterial glaze. In addition, the tiles and antibacterial glaze are quickly fired into antibacterial tiles at the firing temperature.
In a preferred embodiment, the firing temperature is 1180 to 1195 ° C. and the kiln speed is 32 to 45 minutes. The sintering curve changes from room temperature to 1180 to 1195 ° C., after which quenching is completed. At the final temperature, the antibacterial glaze is smoothly sintered by inkjet or screen or roller printing. The appearance, bending resistance, water absorption rate, texture, and antibacterial effect are selected according to the user's satisfaction according to the characteristics of the finished product. After sorting, the products are packed, labeled, stored according to specifications (eg CNS (National Standards of the Republic of China)) and then sent to the client.

Due to the low solubility of zinc oxide in water, Zn ions slowly react with the saturated carbon dioxide solution to form a low solubility basic zinc carbonate precipitate.
The entire process is a dynamic process in which Zn ions are continuously ionized and basic zinc carbonate is continuously precipitated. The particle size of basic zinc carbonate is adjusted by the amount of zinc oxide, the unit amount of carbon dioxide gas, the proportion of water, and the temperature control.
A silica sol coating is added and dried and calcined to decompose excess water and carbonate. In this way, coated nanozinc oxide is obtained in an active state.
In the manufacturing process, nanozinc oxide forms a dense hexagonal close-packed lattice. Each hexagonal close-packed lattice is negatively charged, and thermal energy is generated by collisions between hexagonal close-packed lattices and high-speed rotation. It then produces hydroxides and peroxygen ions, which are directly sterilizing.
In addition, the coated nanozinc oxide has the ability to emit far-infrared rays with wavelengths of 88-92 micrometers, helping, for example, human blood circulation. In addition, the positively charged copper ions contained in the coated nano-copper oxide have stronger bactericidal activity, adhere directly to the protein membranes of bacterial cells and viruses, and directly destroy their structures for sterilization. Achieve the effect of detoxification. With the introduction of coating technology, the sterility rate of nano-zinc oxide copper baked at 1000 to 1600 ° C exceeds 99.9% in 24 hours, and it also has a function like far-infrared radiation with an emissivity of 0.92. ing.

The antibacterial tile of the present invention was tested by the JIS test method (JIS Z 2801: 210 Antibacterial products-Test for antibacterial activity and efficacy). Table 1 shows the test results of the action time of 24 hours.

Table 1 Test results of antibacterial tile

In Table 1,
Antibacterial value (R) = [Average logarithmic number of bacteria in sample without antibacterial substance]-[Average logarithmic number of bacteria in sample containing antibacterial substance]
Is.
When the antibacterial value (R) ≥ 2.0, it means that there is an antibacterial effect.

The antibacterial tiles of the present invention were tested by the ISO inspection method (ISO 22196: 2011 Plastic-Measurement of antibacterial active on plastics surfaces), and the test results are shown in Tables 2 and 3.

Table 2 Test results of antibacterial tile

Table 3 Test results of antibacterial tile

In Tables 2 and 3,
U0: The number of bacteria detected immediately after inoculation of the antimicrobial-free sample, which is between 6.2 × 10 ^{3 and} 2.5 × 10 ⁴ (CFU / cm ² ).
Ut: The number of bacteria in the antibacterial-free sample after 24 hours of incubation.
At: The number of bacteria in the sample containing the antibacterial substance after 24 hours of incubation.
Antibacterial value (R) = Ut-At
The above tests were commissioned by SGS-Food Research Institute-Kaohsiung and SGS-UTIS-Taipei.
In addition, the antibacterial value is converted into a percentage value by the following formula.
[(Ut-At) / Ut] × 100 [%],
The antibacterial rate of E. coli is as follows.
^{[(6.9 × 10 5 -8.10)} /6.9×10 5] × 100 = 99.99 [%]
The antibacterial rate of Staphylococcus aureus is as follows.
^{[(2.1 × 10 3 -1.90)} /2.1×10 3] × 100 = 99.91 [%]

As mentioned above, the antibacterial tiles of the present invention include antibacterial materials, ie, coated nanozinc oxide powder or coated nanozinc oxide powder, or coated nanozinc oxide powder and coated nanocopper oxide. A mixture with the powder is added. Even when the glaze of nano-zinc oxide and nano-copper oxide is fired at 1000 to 1600 ° C, a sterilization rate of 99.9% or more can be obtained in 24 hours, and it also has a function such as emission of far infrared rays, and its emissivity. A maximum rate of 0.92 can be obtained. In addition, the new antibacterial tile manufacturing method has the advantages of being simple, low cost, pollution-free, industrializable, continuously automated, and maintaining stable product quality.

Although the above embodiments have been described with reference to specific embodiments for detailed explanation, the above embodiments have been selected and described for the important points of the disclosure of the present invention or the most appropriate explanation for the implementation of the present invention. This will allow one of ordinary skill in the art to make the best use of the disclosure description of the embodiments and to take advantage of various modifications for special embodiments. The embodiments described above and the accompanying drawings are exemplary and are not intended to be construed in a limited manner. Modifications and modifications obtained from the suggestions described above are included in the present invention.

1 Antibacterial tile 11 Base 12 Decorative soil layer 13 Base glaze layer 14 Antibacterial glaze layer

Claims (7)

With the substrate
A slip layer covering the substrate and
The base glaze layer that covers the slip layer and
An antibacterial tile having an antibacterial glaze layer covering the base glaze layer.
Water and the antibacterial glaze are mixed in a weight ratio of 5 to 6: 4 to 5 with respect to the antibacterial glaze in which the surface glaze and the antibacterial material are mixed in a weight ratio of 100: 5 to 10, and further. The crushed one is used as an antibacterial glaze.
The antibacterial glaze layer is an antibacterial tile provided on the base glaze layer by interspersing, spraying or pouring the antibacterial glaze on the base glaze layer. In the antibacterial tile according to claim 1,
The antibacterial material comprises a coated nano-zinc oxide powder or a coated nano-copper oxide powder, or a mixture of a coated nano-zinc oxide powder and a coated nano-copper oxide powder. .. In the antibacterial tile according to claim 2,
The coated nano-zinc oxide powder is a nano-zinc oxide powder coated with silica sol.
The coated nano-copper oxide powder is an antibacterial tile characterized in that the nano-copper oxide powder is coated with sand. In the antibacterial tile according to claim 1,
An antibacterial tile characterized in that the antibacterial rate of the antibacterial tile against Escherichia coli is 99.9% or more. In the antibacterial tile according to claim 1,
An antibacterial tile characterized in that the antibacterial rate of the antibacterial tile against Staphylococcus aureus is 99.9% or more. In the antibacterial tile according to claim 3,
The nanozinc oxide powder has an average particle size of 2 to 45 nanometers and a specific surface area of 70 to 130 square meters / g.
An antibacterial tile characterized in that the average particle size of the nanocopper oxide powder is 30 to 35 nanometers and the specific surface area is 150 to 180 square meters / g. In the antibacterial tile according to claim 3,
An antibacterial tile characterized in that the average particle size of the particles of the silica sol is 4 to 5 nanometers.

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