Deodorizing sheet and deodorant

Abstract

[Problem] To provide a deodorizing sheet and a deodorant that exhibit excellent deodorizing performance. [Solution] A deodorizing sheet according to the present disclosure includes a nonwoven fabric and a deodorant composition attached to the nonwoven fabric. This deodorant composition contains activated carbon and zinc aluminosilicate at a mass ratio of 3:7 to 8:2. The amount of the deodorant composition attached to per unit area of the deodorizing sheet is 70-120 g / m2 expressed as the total of the activated carbon and the zinc aluminosilicate. A deodorant according to the present disclosure includes said deodorizing sheet and a container for accommodating the deodorizing sheet.

Description

Deodorizing sheets and deodorizers

[0001] This disclosure relates to a deodorizing sheet and a deodorizer containing the same. The deodorizing sheet and deodorizer according to the present invention can be used, for example, to deodorize a trash can containing food waste.

[0002] Whether in restaurants or private homes, the generation of food waste is unavoidable during cooking. In particular, in private homes, garbage collection is not frequent, so food waste is often stored in the trash can for a certain period of time. Food waste generally contains a lot of moisture, and as a result of the high temperature and humidity inside the trash can, it rots and produces a foul odor.

[0003] Deodorizers using fragrances are effective against such unpleasant odors. However, there is also a demand for odor removal itself, rather than relying on fragrances to combat odors.

[0004] For example, Patent Document 1 discloses a deodorizing sheet that is attached to the underside of the lid of a trash can with a lid, and which contains a deodorizing material including activated carbon housed in a nonwoven fabric bag.

[0005] Japanese Patent Publication No. 2000-279497

[0006] However, conventional deodorizing sheets and deodorizers sometimes failed to exhibit sufficient deodorizing performance. Therefore, the purpose of this disclosure is to provide a deodorizing sheet and deodorizer that exhibit good deodorizing performance.

[0007] The inventors diligently investigated the reasons why conventional deodorizing sheets and deodorizers do not exhibit sufficient deodorizing performance. Generally, it is believed that the more deodorizing components a deodorizing sheet or deodorizer contains, the better its deodorizing performance. However, the inventors found that if the deodorizing sheet or deodorizer does not have adequate breathability, its deodorizing performance will not be fully exhibited. Therefore, the inventors found that by optimizing the specific composition of the deodorizing components and the amount they are impregnated with, it is possible to produce a deodorizing sheet and deodorizer that exhibit good deodorizing performance, thus completing the present invention.

[0008] Embodiments of the present invention are, for example, as follows: [1] A deodorizing sheet comprising a nonwoven fabric and a deodorizing agent composition impregnated to the nonwoven fabric, wherein the deodorizing agent composition contains activated carbon and zinc aluminosilicate in a mass ratio of 3:7 to 8:2, and the amount of the deodorizing agent composition impregnated per unit area of ​​the deodorizing sheet is 70 to 120 g / m² as the total of activated carbon and zinc aluminosilicate. ２ This is a deodorizing sheet. [2] The air permeability measured according to Japanese Industrial Standard JIS L 1096 Method A (Fragile method) is 60 cm ３ / cm ２ - A deodorizing sheet according to [1], wherein the value is s or greater. [3] A deodorizing sheet according to [1] or [2], wherein the nonwoven fabric is a needle-punched nonwoven fabric. [4] A deodorizing sheet according to any one of [1] to [3], wherein the mass ratio of the activated carbon to the zinc aluminosilicate is in the range of 45:55 to 70:30. [5] A deodorizing sheet according to any one of [1] to [4], wherein the deodorizing agent composition further contains an antifungal agent. [6] A deodorizer comprising a deodorizing sheet according to any one of [1] to [5] and a container for housing the deodorizing sheet. [7] A deodorizer according to [6], wherein the container is in the shape of a thin plate having a front surface and a back surface, and openings are provided on both the front surface and the back surface. [8] A deodorizer according to [7], wherein the back surface is provided with an adhesive portion for attaching an adhesive member, and the adhesive portion is formed as a convex portion protruding from the reference surface of the back surface.

[0009] According to this disclosure, a deodorizing sheet and a deodorizing agent exhibiting good deodorizing performance are provided.

[0010] The following describes a deodorizing sheet and deodorizer according to one aspect of the present invention.

[0011] A deodorizing sheet according to one aspect of the present invention comprises a nonwoven fabric and a deodorizing agent composition impregnated to the nonwoven fabric. The deodorizing agent composition contains activated carbon and zinc aluminosilicate in a mass ratio of 3:7 to 8:2. Furthermore, the amount of the deodorizing agent composition impregnated per unit area of ​​the deodorizing sheet is 70 to 120 g / m² as the total of activated carbon and zinc aluminosilicate. ２By adopting this configuration, breathability is ensured in the deodorizing sheet, and good deodorizing performance is achieved.

[0012] There are no particular restrictions on the type of nonwoven fabric, as long as the above-mentioned amount of impregnation is ensured in relation to the deodorant composition. As for the nonwoven fabric, for example, needle-punched or thermal-bonded fabrics can be used. From the viewpoint of breathability, it is preferable to use a needle-punched nonwoven fabric with a coarser weave.

[0013] The deodorizing composition contains activated carbon and zinc aluminosilicate as deodorizing components in a mass ratio of 3:7 to 8:2. This mass ratio is more preferably in the range of 45:55 to 70:30, and even more preferably in the range of 55:45 to 70:30.

[0014] The deodorizing composition may further contain other components such as antifungal agents. For example, silver zeolite can be used as the antifungal agent. Typically, the deodorizing composition further contains a binder. For example, an acrylic binder can be used. In this case, the mass ratio of the acrylic binder to the total mass of activated carbon and zinc aluminosilicate is not particularly limited, but is approximately 40:120 to 50:70.

[0015] As mentioned above, the amount of the above deodorizing agent composition impregnated per unit area of ​​the deodorizing sheet is 70 to 120 g / m², as a total of activated carbon and zinc aluminosilicate. ２ This amount of impregnation is based on the total amount of activated carbon and zinc aluminosilicate in the deodorizing agent composition, and does not include the amounts of other components such as the antifungal agent and binder mentioned above. This impregnation amount is 80 to 120 g / m². ２ It is more preferable that the amount be 90-120 g / m². ２It is more preferable that it is so. If this coating amount is excessively small, sufficient deodorizing performance cannot be exhibited due to insufficient deodorizing components. If this coating amount is excessively large, the air permeability in the deodorizing sheet may be impaired, and sufficient deodorizing performance may not be exhibited. Further, if this coating amount is excessively large, "powder dropping" of the deodorant composition from the deodorizing sheet may occur, and the user's feeling of use may be impaired. That is, in the deodorizing sheet according to the present invention, not only using a deodorant composition having a specific composition, but also not excessively attaching the deodorant composition to the non-woven fabric is important.

[0016] The air permeability of the deodorizing sheet is ensured by the combination of the above requirements, but it can also be further evaluated by the air permeability measured according to the Japanese Industrial Standard JIS L 1096 A method (Frazee method). The air permeability of the deodorizing sheet measured by this method is 60 cm ３ / cm ２ ·s or more is preferable, and 70 cm ３ / cm ２ ·s or more is more preferable.

[0017] The thickness of the deodorizing sheet is not particularly limited, but for example, it is about 0.5 to 5 mm, preferably about 1 to 3 mm.

[0018] The deodorizing sheet can be used alone, but typically, it is used together with a container for housing the deodorizing sheet.

[0019] That is, the deodorant according to one aspect of the present invention includes the above deodorizing sheet and a container for housing the deodorizing sheet.

[0020] There is no particular limitation on the configuration of this container. This container is typically in a thin plate shape having a front surface and a back surface, and an opening for enabling access between the external space and the deodorizing sheet is provided on the front surface.

[0021] In the container, it is preferable that openings are provided not only on the front surface but also on the back surface. By adopting such a configuration, the air permeability from the front surface to the back surface is improved, and it becomes possible to further exhibit the deodorizing performance of the deodorizing sheet.

[0022] Furthermore, the back surface of the container is typically provided with an adhesive area for attaching an adhesive material. This allows the deodorizer to be freely attached to a location such as the inner wall of a trash can. It is particularly preferable that this adhesive area is formed as a protrusion that extends from the reference surface on the back surface of the container. Adopting such a configuration creates a gap between the back surface of the container and the attachment point, further ensuring airflow from the front to the back surface of the container and further improving the deodorizing performance of the deodorizing sheet.

[0023] As stated above, there are no particular restrictions on the configuration of the container for the deodorizer, but it is particularly preferable that the container has the configuration described in the patent application (applicant reference number: STPA01075) filed by the present applicant on the same day. Specifically, it is particularly preferable that the container is a thin plate having a front surface and a back surface, the front surface having a first opening, and the back surface having a second opening and an adhesive portion for attaching an adhesive member, the adhesive portion being formed as a convex portion protruding from the reference surface of the back surface.

[0024] Deodorizing compositions and deodorizing sheets were prepared and evaluated according to the following procedure. Note that the following evaluations were performed with the deodorizing sheets not contained in the deodorizing container.

[0025] (Preparation of deodorizing composition) A slurry-like deodorizing composition was obtained by mixing and stirring the components listed in Table 1 below and an acrylic binder (not shown in the table) in water.

[0026]

[0027] (Preparation of deodorizing sheets) Needle-punched or thermal-bonded nonwoven fabric measuring 90 mm in length and 60 mm in width was immersed in the deodorizing agent composition described above. These were then dried to obtain deodorizing sheets. The types of nonwoven fabric used in each example are shown in Table 1 above.

[0028] (Basic evaluation of deodorizing sheets) 1. Amount of impregnated deodorizing agent composition The amount of deodorizing agent composition impregnated into the deodorizing sheet was measured by comparing the mass of the deodorizing agent composition before and after impregnation.

[0029] 2. Air Permeability The air permeability of the deodorizing sheet was measured according to the Japanese Industrial Standard JIS L 1096 Method A (Fragile method).

[0030] (Performance evaluation of the deodorizing sheet) 1. The deodorizing sheet prepared according to the procedure described above was placed in a 10L Tedlar bag (made of polyvinyl fluoride resin) container along with a battery-operated fan, and the container was filled with 10L of odorless air. Next, trimethylamine (40ppm: initial concentration; the same applies below), methyl mercaptan (50ppm), ammonia (200ppm), and hydrogen sulfide (50ppm), which are the main malodorous components of food waste odor, were injected into the container to create an odorous atmosphere of a certain concentration. Subsequently, in accordance with the voluntary standards of the Fragrance Deodorizer Association, the concentration of each malodorous component was measured over time using a gas detection tube, and the time (τ) until the concentration of the malodorous component fell to 1 / 10 or less of the initial concentration was measured. 0.1 The following criteria were used for evaluation: A: τ for all odor components 0.1 B: Less than 100 minutes τ of any one of the odor components 0.1 C: τ relating to at least two of the malodorous components 0.1 D: τ relating to at least one of the malodorous components 0.1 over 200 minutes

[0031] 2. Powder Shedding Test The deodorizing sheet obtained by the above procedure was dropped from a height of 1 m onto a glass plate. The mass of the deodorizing sheet after dropping was measured, and the amount of mass lost from before the drop was considered to be the amount of deodorizing agent composition that fell off due to "powder shedding" from the nonwoven fabric. The "powder shedding" was evaluated according to the following criteria: A: The mass of the deodorizing sheet lost after dropping is less than 1% of the mass before dropping. B: The mass of the deodorizing sheet lost after dropping is 1% or more but less than 5% of the mass before dropping. C: The mass of the deodorizing sheet lost after dropping is 5% or more of the mass before dropping.

[0032] The evaluation results are shown in Table 1. From the results shown in Table 1, the following became clear.

[0033] In Comparative Examples 1 and 4, the amount of deodorizing agent composition impregnated per unit area of ​​the deodorizing sheet was 70 g / m². ２It was less than that. In this case, the evaluation of the deodorization test was C or less, and the deodorization performance was insufficient.

[0034] In Comparative Example 5, the adhesion amount of the deodorant composition per unit area of the deodorant sheet was more than 120 g / m ２ . In this case, the evaluation of the powder falling test was C, and it was found that there was a problem with the usability of the deodorant sheet.

[0035] In Comparative Example 2, the mass ratio of activated carbon to zinc aluminosilicate was less than 3 / 7. In this case, the evaluation of the deodorization test was D, and the deodorization performance was insufficient.

[0036] In Comparative Example 3, the mass ratio of activated carbon to zinc aluminosilicate exceeded 8 / 2. In this case, the evaluation of the deodorization test was C, and the deodorization performance was insufficient.

[0037] On the other hand, in Examples 1 to 6, the adhesion amount of the deodorant composition per unit area of the deodorant sheet was 70 to 120 g / m as the total of activated carbon and zinc aluminosilicate ２ , and the mass ratio of activated carbon to zinc aluminosilicate was a mass ratio of 3:7 to 8:2. In this case, sufficient performance was obtained in both the deodorization test and the powder falling test. In particular, in Examples 2 to 5, excellent deodorization performance was obtained. Furthermore, in Examples 3 to 5, excellent deodorization performance and little powder falling were compatible at a high level.

Claims

1. A deodorizing sheet comprising a nonwoven fabric and a deodorizing agent composition impregnated to the nonwoven fabric, wherein the deodorizing agent composition contains activated carbon and zinc aluminosilicate in a mass ratio of 3:7 to 8:2, and the amount of the deodorizing agent composition impregnated per unit area of ​​the deodorizing sheet is 70 to 120 g / m² as the total of activated carbon and zinc aluminosilicate. ２ This is a deodorizing sheet.

2. Air permeability measured according to Japanese Industrial Standard JIS L 1096 Method A (Fragile method) is 60 cm². ３ / cm ２ - The deodorizing sheet according to claim 1, wherein the value is s or greater.

3. The deodorizing sheet according to claim 1 or 2, wherein the nonwoven fabric is a needle-punched nonwoven fabric.

4. The deodorizing sheet according to claim 1 or 2, wherein the mass ratio of the activated carbon to the zinc aluminosilicate is in the range of 45:55 to 70:

30.

5. The deodorizing sheet according to claim 1 or 2, wherein the deodorizing composition further comprises an antifungal agent.

6. A deodorizer comprising a deodorizing sheet according to claim 1 or 2, and a container for housing the deodorizing sheet.

7. The deodorizer according to claim 6, wherein the container is in the shape of a thin plate having a front surface and a back surface, and openings are provided on both the front surface and the back surface.

8. The deodorizer according to claim 7, wherein the back surface is provided with an adhesive portion for attaching an adhesive member, and the adhesive portion is formed as a convex portion protruding from the reference surface of the back surface.

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