Seal deodorant and method for producing same

Abstract

To provide a seal deodorant that can maintain a deodorizing effect even after the elapse of a predetermined amount of time since the start of use.SOLUTION: A seal deodorant contains: a nonhygroscopic substrate having a first principal face and a second principal face opposite the first principal face; a deodorant layer that is formed on the first principal face of the substrate and contains a nanodiamond catalyst and a binder; and an adhesive layer formed on the second principal face of the substrate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a seal deodorizer and a method for producing the seal deodorizer. [Background technology]

[0002] Humans tend to try to eliminate unpleasant odors as much as possible to improve the comfort of their living spaces. Examples of odor-eliminating targets include their own sweat and sebum, the interior of a car, living spaces such as the entrance, bedroom, living room, dining table, toilet, and washroom, spaces inside refrigerators and freezers, and storage spaces such as storerooms and closets. To meet people's desire to eliminate odors in these target areas as much as possible, various deodorizers tailored to the target area have been developed and are commercially available. Examples of deodorizers include deodorant sprays, freestanding deodorizers, and sheet-type and sticker-type deodorizers.

[0003] Conventional sheet-type and sticker-type deodorants are typically made by impregnating a base material with a chemical containing a deodorizing component. In these types of deodorants, the deodorizing component chemically bonds with odorous components, breaking them down and eliminating the odor.

[0004] This chemical reaction also breaks down the deodorizing ingredients, so the amount of chemicals contained in the base material decreases over time. The chemicals also decrease due to evaporation. Therefore, from the moment the product is opened, that is, from the moment you start using it, the deodorizing effect will be lost over time. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Unexamined Japanese Patent Publication No. 7-232080 [Patent Document 2] Patent No. 4825496 specification Summary of the Invention [Problem to be solved by the invention]

[0006] As described above, conventional deodorants that contain a deodorizing component in a base material lose their deodorizing effect over time after use.

[0007] Therefore, there has been a demand for the development of a deodorizer that can maintain its deodorizing effect over time.

[0008] An object of the present invention is to provide a seal deodorizer that can maintain its deodorizing effect over time and a method for producing a seal deodorizer that can firmly fix a catalyst. [Means for solving the problem]

[0009] After extensive research, the inventors discovered that a seal deodorizer comprising a non-hygroscopic substrate, a deodorizing layer containing a nanodiamond catalyst and a binder, and an adhesive layer can maintain its deodorizing effect even after a period of time has passed since opening. They also discovered that spraying the nanodiamond catalyst onto a polypropylene film with a spray gun firmly adheres the catalyst, leading to the completion of the present invention.

[0010] Therefore, the present invention provides a non-hygroscopic substrate having a first major surface and a second major surface opposite the first major surface; a deodorizing layer formed on the first main surface of the substrate and including a nanodiamond catalyst and a binder; a pressure-sensitive adhesive layer formed on the second main surface of the substrate; To provide a seal deodorizer comprising:

[0011] The present invention also provides a sticker deodorizer, wherein the substrate is a synthetic paper containing a polypropylene film as a main component.

[0012] The present invention also provides a seal deodorizer, wherein the binder is a water-based ceramic binder.

[0013] The present invention also provides a method for producing a seal deodorizer, comprising: A step of spraying an aqueous mixture containing a nanodiamond catalyst and a binder onto a first main surface of a non-hygroscopic substrate using a spray gun to adhere the nanodiamond catalyst and the binder to the first main surface; forming a pressure-sensitive adhesive layer on a second main surface of the substrate opposite to the first main surface; The present invention provides a method for producing a seal deodorizer comprising the steps of:

[0014] The present invention also provides a method for producing a sticker deodorizer, in which synthetic paper containing a polypropylene film as a main component is used as the substrate.

[0015] The present invention also provides a method for producing a seal deodorizer, in which a water-based ceramic binder is used as the binder. [Effects of the Invention]

[0016] The seal deodorizer according to the embodiment can maintain its deodorizing effect even after a certain period of time has passed since the start of use. Furthermore, the seal deodorizer according to the embodiment can exert its deodorizing effect even in a cool, dark room, for example.

[0017] Furthermore, the manufacturing method for a seal deodorizer according to the embodiment can manufacture a seal deodorizer that can maintain its deodorizing effect even after a certain period of time has passed since the start of use. Furthermore, the manufacturing method for a seal deodorizer according to the embodiment can manufacture a seal deodorizer while suppressing warping, etc. Furthermore, the manufacturing method for a seal deodorizer according to the embodiment can firmly fix the nanodiamond catalyst to the substrate. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a schematic cross-sectional view of a seal deodorizer according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] An example of the seal deodorizer according to the embodiment will be specifically described below with reference to Fig. 1. However, the seal deodorizer of the present invention is not limited to the example described below.

[0020] The seal deodorizer 10 shown in FIG. 1 includes a substrate 1, a deodorizing layer 2, and an adhesive layer 3.

[0021] The substrate 1 is a non-hygroscopic substrate. Because the substrate 1 is non-hygroscopic, warping of the substrate 1 can be prevented even when the deodorizing layer 2 is formed by spray coating the aqueous mixture.

[0022] The substrate 1 is not particularly limited as long as it is non-hygroscopic, but for example, synthetic paper containing polypropylene film as the main component can be used as the substrate 1. A specific example of synthetic paper containing polypropylene film as the main component is Yupo (registered trademark).

[0023] The substrate 1 may be a substrate that is not particularly non-hygroscopic and that has been made non-hygroscopic by applying a sizing agent to it. The non-hygroscopicity of the substrate 1 may be such that it does not absorb moisture even when sprayed with an aqueous mixture.

[0024] The substrate 1 has a first main surface 1A and a second main surface 1B opposite thereto.

[0025] On the first main surface 1A of the substrate 1, the deodorizing layer 2 is formed.

[0026] The deodorizing layer 2 includes a nanodiamond catalyst and a binder.

[0027] The nanodiamond catalyst is a particulate diamond, and includes, for example, diamond particles having a size of several nanometers to several thousand nanometers. The nanodiamond catalyst can be, for example, particulate industrial diamond. The nanodiamond catalyst can be generally commercially available nanodiamond particles.

[0028] The nanodiamond catalyst's electrical properties allow it to decompose and neutralize bacteria, viruses, odorous substances, and other contaminants that come into contact with the catalyst particles through an oxidation-reduction reaction. The nanodiamond catalyst itself does not wear out even after exerting its catalytic action. Therefore, even after opening the seal deodorizer 10 of the present invention and starting use, the catalytic action continues semi-permanently, maintaining the deodorizing effect.

[0029] Moreover, unlike photocatalysts, nanodiamond catalysts can exhibit catalytic action even in the dark. Furthermore, they can also exhibit catalytic action in cold places. Therefore, the seal deodorizer 10 of the present invention can exhibit deodorizing effects even in cold places without a light source, such as refrigerators and freezers.

[0030] The average primary particle size of the nanodiamond catalyst can be any particle size that can exhibit catalytic activity. The average primary particle size of the nanodiamond catalyst can be 0.1 nm to several thousand nm, for example, 0.1 nm to 300 nm, 0.5 nm to 50 nm, or 1 nm to 10 nm. Products containing nanodiamond catalysts with such average primary particle sizes can exhibit a higher deodorizing effect.

[0031] The deodorizing layer 2 can contain nanodiamond particles of any size (mean particle size regardless of whether they are primary or secondary particles) depending on the desired deodorizing effect and cost-effectiveness, but can also contain agglomerated nanodiamond catalyst with average particles of 10 μm to 30 μm or more. The agglomerated nanodiamond catalyst can also be provided as nanodiamond particles of the above size in a mixture with a binder. A deodorizing layer 2 containing a nanodiamond catalyst with such an average particle size has an excellent balance between the amount of nanodiamond catalyst supported and the critical area, resulting in a higher deodorizing effect.

[0032] The binder is not particularly limited, but may be a liquid ceramic binder, for example, an aqueous binder. The use of an aqueous binder results in a more environmentally friendly product. Furthermore, the use of an aqueous binder allows the deodorizing layer 2 to be formed from an aqueous suspension with excellent dispersibility. In particular, it is preferable to use an aqueous inorganic binder such as an aqueous ceramic binder.

[0033] Since the substrate 1 is a non-hygroscopic substrate, even if the deodorizing layer 2 is formed using an aqueous slurry containing an aqueous binder, it is possible to prevent the appearance of the product from being damaged due to warping or expansion of the substrate 1 caused by moisture absorption, making the product unmarketable.

[0034] The content of the nanodiamond catalyst in the deodorizing layer 2 can be selected based on the desired deodorizing effect and cost-effectiveness. If it is within this range or higher, an excellent deodorizing effect can be achieved.

[0035] On the second main surface 1B of the substrate 1, that is, on the side opposite to the deodorant layer 2, an adhesive layer 3 is formed.

[0036] The adhesive layer 3 can serve to attach the sticker deodorizer 10 to an object to be attached.

[0037] The adhesive layer 3 is not particularly limited, but may be an adhesive that is normally used as a sealant. For example, frozen food glue may be used as the adhesive layer 3. Frozen food glue is naturally derived and environmentally friendly.

[0038] In the seal deodorizer 10 of the present invention, since the base material 1 is non-hygroscopic, it is possible to prevent the moisture in the slurry for forming the deodorizing layer 2 from migrating to the base material 1. Therefore, it is possible to prevent the adhesive effect from being weakened due to the moisture migrating to the adhesive layer 3.

[0039] The seal deodorizer 10 of the present invention may also include other components. For example, a protective layer may be provided on the deodorizing layer 2. Also, a release layer may be provided on the adhesive layer. When applying the deodorizer 10, it can be easily adhered by simply peeling off the release layer.

[0040] [Method of manufacturing seal deodorizer] A method for producing the seal deodorizer according to the embodiment will be described below.

[0041] The seal deodorizer according to the embodiment described above can be manufactured by the manufacturing method of the seal deodorizer described below. However, the seal deodorizer according to the embodiment can also be manufactured by a manufacturing method other than the manufacturing method of the seal deodorizer according to the embodiment.

[0042] The manufacturing method of the seal deodorizer according to the embodiment includes a step of spraying an aqueous mixture containing a nanodiamond catalyst and a binder onto a first main surface of a non-hygroscopic substrate using a spray gun to adhere the nanodiamond catalyst and the binder to the first main surface of the substrate. By using a spray gun equipped with a compressor as the spray gun, the nanodiamond catalyst can be firmly sprayed onto the substrate at the desired pressure.

[0043] The aqueous mixture is sprayed onto the substrate using a spray gun equipped with a compressor, firmly adhering the nanodiamond catalyst and binder to the substrate. After this process, the water is evaporated. This process allows a deodorizing layer containing aggregated nanodiamond catalyst and binder with a desired average particle size (mean particle size regardless of primary and secondary particles), for example, 10 μm to 30 μm or more, to be formed on the first main surface of the substrate. Because the substrate is non-hygroscopic, it does not absorb the water from the aqueous mixture. Furthermore, spraying onto the substrate using a spray gun equipped with a compressor allows for stronger adhesion compared to simply adhering the nanodiamond catalyst to the substrate with an adhesive, allowing the nanodiamond catalyst to remain adhered to the substrate for a long period of time. Furthermore, even if a nanodiamond catalyst containing moisture is attached to a substrate under pressure, the non-hygroscopic nature of the nanodiamond catalyst means that the moisture in the nanodiamond catalyst and binder is not absorbed by the substrate, and the moisture is released into the air, allowing the nanodiamond catalyst to be firmly attached to the substrate, and the nanodiamond catalyst will not peel off even during use.

[0044] The nanodiamond catalyst can be attached to the substrate in any amount. For example, when the nanodiamond catalyst is mixed with a binder containing 2500 trillion nanodiamonds per 100 ml, the amount of nanodiamond attached to the substrate is 1 m. 2 Spray 25ml of agent per 1m to seal 2 It is possible to deposit 625 trillion nanodiamond catalysts per substrate.

[0045] The deodorizing layer formed on the first main surface of the substrate 1 may be provided with a protective layer to protect the layer until use. By removing the protective layer before use, the layer will not get dirty until use, and the nanodiamond catalyst in the deodorizing layer can exert its effect.

[0046] Next, a step of forming a pressure-sensitive adhesive layer on a second main surface of the substrate opposite to the first main surface is carried out.

[0047] Since moisture is not absorbed by the substrate in the previous process, moisture does not migrate to the adhesive layer, and therefore the adhesive properties of the adhesive layer are not impaired. A protective layer may be provided on the adhesive layer to protect the layer until use. By removing the protective layer when in use, the adhesive layer can be adhered to the desired contact surface without contamination.

[0048] The materials used in the manufacturing method according to this embodiment can be those listed in the description of the seal deodorizer according to this embodiment.

[0049] The step of attaching the nanodiamond catalyst and the binder to the first main surface and the step of forming an adhesive layer on the second main surface of the substrate opposite the first main surface can be performed in either order. [Example]

[0050] Next, examples will be described. However, the examples are intended to be illustrative of specific embodiments and are not intended to limit the present invention.

[0051] (Example) A commercially available product with frozen food glue applied to the substrate was purchased and used. Yupo #80 Kisepa for frozen foods (Maru Adhesive Co., Ltd.) was prepared. The surface substrate is primarily polypropylene, the adhesive layer is an acrylic ester copolymer, and there is a release layer on the adhesive surface.

[0052] The aqueous mixture containing the nanodiamond catalyst and binder was purchased and used as NRC-G02S / aqueous inorganic binder (Nakamura Fukuiya Co., Ltd.). The weight percentages were as follows: Of the following, the amorphous inorganic compound is the binder, and the carbon-based organic-inorganic complex compound is the nanodiamond catalyst. [Table 1]

[0053] This aqueous mixture was sprayed onto the first main surface of the substrate using a spray gun equipped with a compressor and dried. The aqueous mixture contained 2,500 trillion nanodiamond catalysts per 100 ml, and the seal area was 1 m. 2 By spraying 25ml of agent per square meter, the seal is calculated to be 1m 2 625 trillion nanodiamond catalyst particles were attached per unit area. Thus, a deodorizing layer was formed on the first main surface of the substrate. The average particle size of the nanodiamonds in the deodorizing layer was estimated to be approximately 30 μm.

[0054] According to the above procedure, the seal deodorizer of the example was produced.

[0055] (Comparative Example 1) In Comparative Example 1, a seal deodorizer of Comparative Example 1 was produced in the same manner as in Examples, except that the aqueous mixture was applied to the substrate using a brush.

[0056] However, in the seal deodorizer of Comparative Example 1, the adhesive strength between the deodorizing layer and the substrate was weak, and the deodorizing layer was easily peeled off from the substrate.

[0057] (evaluation) The seal deodorizer of Example 1 was placed in a cool, dark room together with the odor source. Similarly, the seal deodorizer of Comparative Example 1 was placed in a separate cool, dark room together with the odor source.

[0058] The nanodiamond catalyst of the seal deodorizer of Comparative Example 1 peeled off from the substrate, and it could not be used as a deodorizer.

[0059] On the other hand, the deodorizer of the seal deodorizer of the example was able to sufficiently deodorize the odor source.

[0060] The deodorizing source was added every other day for two weeks to a cool, dark room containing the seal deodorizer of the example, but the nanodiamond catalyst did not peel off even after two weeks, and the deodorizing effect continued. [Industrial Applicability]

[0061] The seal deodorizer according to the embodiment can maintain its deodorizing effect even after a long time has passed since the start of use. Furthermore, the seal deodorizer according to the embodiment can exert its deodorizing effect even in a cool, dark room. [Explanation of symbols]

[0062] 1...base material, 1A...first main surface, 1B...second main surface, 2...deodorizing layer, 3...adhesive layer.

Claims

1. a non-hygroscopic substrate having a first major surface and a second major surface opposite the first major surface; a deodorizing layer formed on the first main surface of the substrate, the deodorizing layer including a nanodiamond catalyst and a water-based inorganic binder; a pressure-sensitive adhesive layer formed on the second main surface of the base material; A seal deodorizer comprising: A step of spraying an aqueous mixture containing the nanodiamond catalyst and the aqueous inorganic binder onto a first main surface of the non-hygroscopic substrate using a spray gun equipped with a compressor to adhere the nanodiamond catalyst and the binder to the first main surface; forming a pressure-sensitive adhesive layer on a second main surface of the substrate opposite to the first main surface; A seal deodorizer produced by a method for producing the seal deodorizer comprising the steps of: Seal deodorant.

2. 2. The seal deodorizer according to claim 1, wherein the base material is a synthetic paper containing a polypropylene film as a main component.

3. A method for producing a seal deodorizer, comprising the steps of: A step of spraying an aqueous mixture containing a nanodiamond catalyst and an aqueous inorganic binder onto a first main surface of a non-hygroscopic substrate using a spray gun equipped with a compressor to adhere the nanodiamond catalyst and the aqueous inorganic binder to the first main surface; forming a pressure-sensitive adhesive layer on a second main surface of the substrate opposite to the first main surface; A method for producing a seal deodorizer comprising the steps of:

4. 4. The method for producing a seal deodorizer according to claim 3, wherein the base material is a synthetic paper containing a polypropylene film as a main component.

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