JP7626448B2 - Seal deodorant and method for producing same - Google Patents

Description

The present invention relates to a seal deodorizer and a method for manufacturing the seal deodorizer.

Humans have a tendency to try to eliminate unpleasant odors as much as possible in order to improve the comfort of their living spaces. Examples of odors that need to be deodorized include one's own sweat and sebum, the interior of a personal car, living spaces such as entrances, bedrooms, living rooms, dining tables, toilets and washrooms, spaces inside refrigerators and freezers, and storage spaces such as storerooms and closets. In response to people's desire to make these odor-eliminating objects as odorless as possible, a variety of deodorizers have been developed and are commercially available according to the odor-eliminating object. Examples of deodorizers include deodorant sprays and other odor-eliminating sprays, free-standing odor-eliminating agents, and sheet- and sticker-type odor-eliminating agents.

Conventional sheet-type and sticker-type deodorants are typically of the type in which a chemical containing a deodorant component is soaked into a base material. In these types of deodorants, for example, the deodorant component of the chemical chemical bonds with the odorous component, breaking down the odorous component and eliminating the odor.

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, i.e., from the moment use begins, the deodorizing effect is lost over time.

Unexamined Japanese Patent Publication No. 7-232080 Patent No. 4825496

As mentioned above, conventional deodorants that contain deodorant ingredients in the base material lose their deodorant effect over time after use.

Therefore, there was a need to develop a deodorizer that could maintain its deodorizing effect over time.

The present invention aims to provide a method for producing a seal deodorizer that can maintain its deodorizing effect over time and that can firmly adhere a catalyst.

After extensive research, the inventors discovered that a seal deodorant that includes a non-hygroscopic substrate, a deodorant layer containing a nanodiamond catalyst and a binder, and an adhesive layer can maintain its deodorant effect even after a period of time has passed since it was opened. They also discovered that spraying the nanodiamond catalyst onto a polypropylene film with a spray gun firmly adheres the catalyst, and thus completed the present invention.

Thus, the present invention provides
a non-hygroscopic substrate having a first major surface and a second major surface opposite the first major surface;
A seal deodorizer is provided, which comprises a deodorizing layer formed on a first main surface of a substrate and containing a nanodiamond catalyst and a binder, and an adhesive layer formed on a second main surface of the substrate.

The present invention also provides a seal deodorizer in which the base material is synthetic paper whose main component is polypropylene film.

The present invention also provides a seal deodorizer in which the binder is a water-based ceramic binder.

The present invention also provides a method for producing a seal deodorizer, comprising the steps of:
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;
and forming a pressure-sensitive adhesive layer on a second main surface of the base material opposite to the first main surface.

The present invention also provides a method for producing a seal deodorizer that uses synthetic paper containing polypropylene film as the base material.

The present invention also provides a method for producing a seal deodorizer using a water-based ceramic binder as the binder.

The seal deodorizer according to the embodiment can maintain its deodorizing effect even after a certain amount of time has passed since it was first used. Furthermore, the seal deodorizer according to the embodiment can exert its deodorizing effect even in a cool, dark room, for example.

The method for producing a seal deodorizer according to the embodiment can produce a seal deodorizer that can maintain its deodorizing effect even after a certain amount of time has passed since the start of use. The method for producing a seal deodorizer according to the embodiment can produce a seal deodorizer while suppressing warping and other problems. Furthermore, the method for producing a seal deodorizer according to the embodiment can firmly adhere the nanodiamond catalyst to the substrate.

1 is a schematic cross-sectional view of a seal deodorizer according to an embodiment.

Below, an example of a seal deodorizer according to an embodiment will be specifically described with reference to FIG. 1. However, the seal deodorizer of the present invention is not limited to the example described below.

The seal deodorizer 10 shown in FIG. 1 comprises a substrate 1, a deodorizing layer 2, and an adhesive layer 3.

The substrate 1 is a non-hygroscopic substrate. Since the substrate 1 is non-hygroscopic, warping of the substrate 1 can be prevented even when the deodorizing layer 2 is formed by spraying the aqueous mixture.

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

The substrate 1 may be a substrate that is not particularly non-hygroscopic, but is made non-hygroscopic by applying a sizing agent. The non-hygroscopicity of the substrate 1 may be such that it does not absorb moisture even when sprayed with an aqueous mixture.

The substrate 1 has a first main surface 1A and a second main surface 1B on the opposite side.

A deodorizing layer 2 is formed on the first main surface 1A of the substrate 1.

The deodorizing layer 2 contains a nanodiamond catalyst and a binder.

Nanodiamond catalysts are particulate diamonds, including, for example, diamond particles ranging in size from a few nm to several thousand nm. Nanodiamond catalysts can be, for example, particulate industrial diamonds. Nanodiamond catalysts can be commercially available nanodiamond particles.

The nanodiamond catalyst is capable of decomposing and rendering harmless bacteria, viruses, odorous components, etc. that come into contact with the catalyst particles through an oxidation-reduction reaction due to its electrical properties. The nanodiamond catalyst itself does not wear out even when it exerts its catalytic action. Therefore, even if time has passed since the seal deodorizer 10 of the present invention was opened and use was started, the catalytic action continues semi-permanently, and the deodorizing effect can be maintained.

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 exert its deodorizing effect even in cold places without a light source, such as refrigerators and freezers.

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 from 0.1 nm to several thousand nm, for example, from 0.1 nm to 300 nm, from 0.5 nm to 50 nm, or from 1 nm to 10 nm. Products containing nanodiamond catalysts with such average primary particle sizes can exhibit a higher deodorizing effect.

In the deodorizing layer 2, the average particle size of the nanodiamond particles (average particle size without distinction between primary and secondary particles) can be any size depending on the desired deodorizing effect and cost-effectiveness, but can include, for example, agglomerated nanodiamond catalyst with an average particle size of 10 μm to 30 μm or more. The agglomerated nanodiamond catalyst is also provided as nanodiamond particles of the above size as 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, and can exhibit a higher deodorizing effect.

The binder is not particularly limited, but may be a liquid ceramic binder, for example, a water-based binder. By using a water-based binder, the product becomes more environmentally friendly. In addition, by using a water-based binder, the deodorizing layer 2 can be formed from a water-based suspension with excellent dispersibility. In particular, it is preferable to use a water-based inorganic binder such as a water-based ceramic binder.

Because 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 substrate 1 from warping or expanding and contracting due to moisture absorption, which would impair the appearance of the product and render it unmarketable.

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

An adhesive layer 3 is formed on the second main surface 1B of the substrate 1, i.e., on the side opposite the deodorant layer 2.

The adhesive layer 3 serves to attach the sticker deodorizer 10 to the object to which it is to be attached.

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

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. This makes it possible to prevent moisture from migrating to the adhesive layer 3, thereby preventing the adhesive effect from being weakened.

The seal deodorizer 10 of the present invention may also contain 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 attached by simply peeling off the release layer.

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

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.

The manufacturing method of the seal deodorant 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 with 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.

The aqueous mixture is sprayed onto the substrate using a spray gun equipped with a compressor, so that the nanodiamond catalyst and binder are firmly attached to the substrate. After this process, the water is evaporated. By the above process, a deodorizing layer containing aggregated nanodiamond catalyst and binder with a desired average particle size (average particle size without distinction between primary particles and secondary particles), for example, an average particle size of 10 μm to 30 μm or more, can be formed on the first main surface of the substrate. Since the substrate is non-hygroscopic, it does not absorb the water of the aqueous mixture. Also, by spraying onto the substrate using a spray gun equipped with a compressor, the nanodiamond catalyst can be firmly attached compared to when it is simply attached to the substrate 1 with an adhesive, etc., and the nanodiamond catalyst can be kept attached to the substrate 1 for a long period of time. Furthermore, even if a nanodiamond catalyst containing moisture is applied 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 outside air, allowing the nanodiamond catalyst to be firmly attached to the substrate, and the nanodiamond catalyst will not peel off even during use.

The nanodiamond catalyst can be applied to the substrate in any amount. For example, when the nanodiamond catalyst is mixed with a binder containing 2,500 trillion nanodiamonds per 100 ml, 625 trillion nanodiamonds can be applied per 1 ^m2 of seal by spraying 25 ml of the agent per 1 ^m2 of seal.

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 when in use, the layer will not become dirty until use, and the nanodiamond catalyst in the deodorizing layer will be able to exert its effect.

Next, a step of forming an adhesive layer is performed on the second main surface of the substrate opposite the first main surface.

Because no moisture is absorbed by the base material in the previous process, moisture does not migrate to the adhesive layer, and therefore the adhesive properties of the adhesive layer are not impaired. The adhesive layer may be provided with a protective layer to protect the layer until use. By removing the protective layer when in use, the adhesive layer can be attached to the desired contact surface without contamination.

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.

The process of attaching the nanodiamond catalyst and the binder to the first main surface and the process of forming an adhesive layer on the second main surface of the substrate opposite the first main surface can be performed in any order.

Next, examples will be described. However, the purpose of the examples is to explain specific examples of embodiments and not to limit the present invention.

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

The aqueous mixture containing the nanodiamond catalyst and binder was purchased and used as NRC-G02S/aqueous inorganic binder (Nakamura Fukuiya Co., Ltd.). It had the following weight percentages:
Among the following, the amorphous inorganic compound is the binder, and the carbon-based organic-inorganic complex compound is the nanodiamond catalyst.

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 by spraying 25 ml of the agent per 1 ^m2 of seal, 625 trillion nanodiamond catalysts were attached per 1 ^m2 of seal in calculations. 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.

The sealant deodorizer of the embodiment was manufactured using the above procedure.

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

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

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

The nanodiamond catalyst in the sticker deodorant of Comparative Example 1 peeled off from the base material, and it could not be used as a deodorant.

On the other hand, the seal deodorizer of the embodiment was able to sufficiently deodorize the odor source.

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

The seal deodorizer according to the embodiment can maintain its deodorizing effect even after a long time has passed since it was first used. Furthermore, the seal deodorizer according to the embodiment can exert its deodorizing effect even in a cool, dark room.

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

Claims (4)

a non-hygroscopic substrate having a first major surface and a second major surface opposite the first major surface;
A seal deodorizer comprising: a deodorizing layer formed on the first main surface of the substrate, the deodorizing layer including a nanodiamond catalyst and an aqueous inorganic binder; and a pressure-sensitive adhesive layer formed on the second main surface of the substrate,
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;
and forming a pressure-sensitive adhesive layer on a second main surface of the base material opposite to the first main surface.
Seal deodorant. The seal deodorizer according to claim 1, wherein the base material is synthetic paper whose main component is polypropylene film. 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;
and forming a pressure-sensitive adhesive layer on a second main surface of the base material opposite to the first main surface. 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.