Deodorizing sheet

Abstract

To provide a sheet-type deodorizer that can stably exhibit excellent deodorizing effects even in dark places regardless of the presence or absence of light, is less subject to restrictions in installation environments such as curved surfaces and narrow spaces, and is easy to handle. [Solution] A deodorizing sheet 1 that exhibits a deodorizing effect is provided, which is composed of a deodorizing agent layer 2, an adhesive layer 4, and a sheet substrate layer 6, and the deodorizing agent is zinc oxide. The particle diameter of the zinc oxide is 5 nm to 100 μm, and the thickness of the sheet substrate is 5 μm to 50 mm.

Description

[Technical Field]

[0001] This invention relates to a sheet with deodorizing effect. [Background technology]

[0002] Known examples of devices or inventions with deodorizing effects include a bactericidal deodorizing board in which a chlorine dioxide aqueous solution is held on a soft ceramic board (Patent Document 1), a deodorizing sheet in which a titanium oxide photocatalyst coated with a porous inorganic material is blended with odorous substances, oxygen gas, and a light-transmitting resin (Patent Document 2), and a solid deodorizing fragrance that uses a gelling agent to more effectively hold activated carbon, synergizing the fragrance of the fragrance and the adsorption by the activated carbon, and preventing the activated carbon from scattering outside the container (Patent Document 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 60-86337 [Patent Document 2] Japanese Patent Application Laid-Open No. 2025-112190 [Patent Document 3] Japanese Patent Application Laid-Open No. 2001-252342 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional deodorizers each have the following limitations. Deodorizing plates, which are made by holding a chlorine dioxide solution on a soft ceramic plate, have the problem that they cannot be installed in places with shape restrictions, such as curved surfaces or narrow spaces, due to their plate shape. Deodorizing sheets using titanium dioxide photocatalysts depend on the environment in which light is irradiated, so they do not provide sufficient deodorizing effects in dark places or places with insufficient light. Furthermore, solid deodorizing air fresheners containing activated carbon are deodorizers that use activated carbon to absorb odors, so their deodorizing effects weaken over time. They also often require large containers, which limits installation locations or interferes with the use of the surrounding space.

[0005] Therefore, the object of the present invention is to provide a sheet-type deodorizer that can stably exert excellent deodorizing effects even in dark places regardless of the presence or absence of light, is not easily restricted by installation environments such as curved surfaces or narrow spaces, and is easy to handle. [Means for solving the problem]

[0006] The present invention provides a deodorizing sheet that exhibits a deodorizing effect, which is composed of a deodorizing agent layer, an adhesive layer, and a sheet substrate layer, and the deodorizing agent is zinc oxide. [Effects of the Invention]

[0007] This invention uses zinc oxide as a deodorizer, which provides a catalytic effect without the need for light, and because it relies on catalytic action rather than adsorption, it can maintain a continuous deodorizing effect. Furthermore, by using a sheet-shaped substrate, it can provide a large surface area, eliminating the need for bulky, space-saving deodorizers, and providing a sheet that effectively deodorizes even on curved surfaces or in narrow spaces. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view of a deodorizing sheet 1 according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] A deodorizing sheet according to an embodiment of the present invention will now be described. Fig. 1 is a cross-sectional view of a deodorizing sheet 1 according to this embodiment. The deodorizing sheet 1 according to this embodiment is characterized in that it is composed of a deodorizing agent 2, an adhesive layer 4, and a sheet substrate layer 6, and the deodorizing agent 2 is zinc oxide.

[0010] Zinc oxide (ZnO) is a white powdery solid that is poorly soluble in water, relatively soluble in acids and alkalis, and is chemically stable, as well as relatively stable against light and heat. Furthermore, zinc oxide is an inorganic compound with antibacterial and deodorizing properties. The deodorizing sheet 1 of the present invention supports zinc oxide on the substrate, thereby providing long-term antibacterial and deodorizing effects regardless of whether it is exposed to light or not.

[0011] In this embodiment, the particle size of the zinc oxide is preferably 5 nm to 100 μm.

[0012] By controlling the particle size within the above range, the specific surface area increases, the contact efficiency with odorous components increases, and an excellent deodorizing effect is obtained.

[0013] The amount of zinc oxide disposed on the sheet substrate 6 is not particularly limited, but from the viewpoint of exerting a deodorizing effect, it is preferable that the amount of zinc oxide disposed on the sheet substrate 6 be 1 / m or more. 2 A suitable amount is 2 mg to 5 g per particle, preferably 10 mg to 2 g, and more preferably 50 mg to 1 g. Although granular zinc oxide 2 is shown in Fig. 1, this embodiment also includes an embodiment in which zinc oxide 2 is laminated to form a deodorant layer.

[0014] Examples of methods for disposing zinc oxide on the sheet substrate 6 include application with a brush, spray application, and immersion application, but the present invention is not limited to these methods, and other methods can also be used as long as they do not deviate from the spirit of the present invention.

[0015] In this embodiment, the sheet substrate 6 is preferably at least one material selected from the group consisting of paper, wood, silk, cotton, and linen.

[0016] By selecting these naturally derived fibers and materials for the sheet substrate 6, it is possible to achieve excellent flexibility, processability, and moisture absorption, as well as to easily support active ingredients and to be environmentally friendly. Furthermore, it becomes possible to install the deodorizer on curved surfaces and in narrow spaces, which was difficult with conventional resin sheets or deodorizer containers, greatly improving the practicality and installation flexibility of the deodorizer.

[0017] In this embodiment, the sheet substrate 6 is preferably made of at least one material selected from the group consisting of rayon nonwoven fabric, polypropylene nonwoven fabric, and polyester nonwoven fabric.

[0018] By selecting these synthetic fibers and materials as the sheet substrate 6, moisture resistance and durability are improved compared to conventional paper or natural fiber substrates, and the porous structure of the nonwoven fabric allows it to efficiently retain deodorizing and antibacterial ingredients, resulting in a stable deodorizing effect over a long period of time.

[0019] In this embodiment, the sheet substrate 6 is preferably at least one selected from the group consisting of polyethylene, polystyrene, polypropylene, polyvinylidene chloride, polyvinyl chloride, and polyethylene terephthalate.

[0020] By selecting these synthetic resin films as the sheet substrate 6, the sheet is less susceptible to deterioration by moisture and chemicals than conventional natural fiber substrates or nonwoven fabric substrates, and furthermore, by combining multi-layering and surface treatment, it is possible to enhance the deodorant retention and barrier properties. As a result, the deodorant is stably retained and is highly effective for a long period of time.

[0021] In this embodiment, the thickness of the sheet substrate 6 is preferably 5 μm to 50 mm.

[0022] By setting the thickness of the sheet substrate 6 within the above range, it can be widely applied from thin to thick types depending on the application, and the practicality is greatly improved compared to the limited substrates of the past.

[0023] In this embodiment, the adhesive used in the adhesive layer 4 is preferably at least one selected from the group consisting of acrylic, styrene, vinyl acetate, epoxy, cyanoacrylate, urethane, silicone, rubber, and hot melt adhesives.

[0024] By selecting these adhesives 4, it is possible to prevent the zinc oxide 2 from falling off the sheet substrate 6, and to ensure flexibility, moisture resistance, and durability according to the usage environment. Furthermore, by selecting the type of adhesive, it is possible to impart properties according to the application, such as transparency and mass productivity. Note that by providing an adhesive layer on the back surface of the deodorizing sheet 1 of this embodiment, the deodorizing sheet can be attached to a desired location. [Example]

[0025] 1. Manufacturing deodorizing paper sheets (1) Material Zinc oxide (MZ-500 (trademark) manufactured by Teika Co., Ltd.) was used as a deodorizer, and 64 g / m of paper was used as the sheet substrate. 2 The adhesive used was vinyl acetate adhesive (Pegale K210 (trademark), manufactured by Koatsu Gas Kogyo Co., Ltd.) as the adhesive substrate.

[0026] The sample was prepared as follows: 10 parts by weight of Pegal K210 (trademark) was added to water and stirred, and 20 parts by weight of zinc oxide was added thereto, followed by stirring for 5 minutes at 8,000 rpm in a homomixer to prepare a zinc oxide solution.

[0027] Next, the amount of zinc oxide placed on the sheet substrate, paper, was 1 m 2 The mixture was evenly applied with a brush so that the weight was 1 g per sample, and after air drying, the sample was prepared (sample 1).

[0028] (2) Deodorization test The samples prepared as described above were subjected to deodorization tests as follows. A sample (10 x 10 cm) was pretreated by wetting at 20°C and 65% RH for 24 hours. After placing the sample in a Tedlar bag (5 L capacity, manufactured by AS ONE Corporation), 3 L of the odor component (initial concentration) trimethylamine (approximately 28 ppm) was poured into it. The odor concentration was measured after 2 and 24 hours of standing. Measurements were performed using a gas detector tube sampler (GV-100™, manufactured by Gastec Corporation). The Tedlar bag containing the sample and odor was designated the "main test," while the bag containing only the odor was designated the "blank test." Measurements were performed three times, and the average values ​​were recorded. The results are shown in Table 1.

[0029] [Table 1]

[0030] How to calculate the reduction rate Reduction rate (%) = (blank test concentration - actual test concentration) ÷ blank test concentration × 100

[0031] The sheet-like product, which had zinc oxide placed on a paper substrate, was found to have a significantly greater deodorizing effect than the blank test. [Industrial Applicability]

[0032] By placing the deodorizing sheet of this invention in a dark place such as a closet or refrigerator, it is possible to decompose the odor components that are generated and eliminate the odor, thereby maintaining a hygienic environment. [Explanation of symbols]

[0033] 1... Deodorizing sheet 2...Deodorizing layer (zinc oxide) 4...Adhesive layer 6...Sheet base layer

Claims

1. A deodorizing sheet that exhibits a deodorizing effect, The sheet is composed of a deodorant layer, an adhesive layer, and a sheet substrate layer, The deodorant is zinc oxide. Deodorizing sheet.

2. 2. The deodorizing sheet according to claim 1, wherein the particle diameter of the zinc oxide is from 5 nm to 100 μm.

3. 2. The deodorizing sheet according to claim 1, wherein the sheet substrate is at least one material selected from the group consisting of paper, wood, silk, cotton, and linen.

4. 2. The deodorizing sheet according to claim 1, wherein the sheet substrate is at least one material selected from the group consisting of rayon nonwoven fabric, polypropylene nonwoven fabric, and polyester nonwoven fabric.

5. 2. The deodorizing sheet according to claim 1, wherein the sheet substrate is at least one selected from the group consisting of polyethylene, polystyrene, polypropylene, polyvinylidene chloride, polyvinyl chloride, and polyethylene terephthalate.

6. 2. The deodorizing sheet according to claim 1, wherein the thickness of the sheet substrate is from 5 μm to 50 mm.

7. 2. The deodorizing sheet according to claim 1, wherein the adhesive is at least one selected from the group consisting of acrylic, styrene, vinyl acetate, epoxy, cyanoacrylate, urethane, silicone, rubber, and hot melt adhesives.

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