Deodorizing sheets and deodorizers

Abstract

To provide a deodorizing sheet and a deodorizing agent that exhibit good deodorizing performance. [Solution] The deodorizing sheet according to this disclosure comprises a nonwoven fabric and a deodorizing agent composition impregnated to the nonwoven fabric. This deodorizing agent composition contains activated carbon and zinc aluminosilicate in a mass ratio of 3:7 to 8:2. 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 The deodorizer relating to this disclosure includes the deodorizing sheet and a container for housing the deodorizing sheet.

Description

[Technical Field]

[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. [Background technology]

[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. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2000-279497 [Overview of the project] [Problems that the invention aims to solve]

[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] Examples of the present invention are 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] Air permeability measured according to Japanese Industrial Standard JIS L 1096 Method A (Fragile method) is 60 cm 3 / cm 2 • A deodorizing sheet described in [1] that is s or greater. [3] The deodorizing sheet according to [1] or [2], wherein the nonwoven fabric is a needle-punched nonwoven fabric. [4] The 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] The deodorizing sheet according to any one of [1] to [4], wherein the deodorizing composition further contains an antifungal agent. A deodorizer comprising a deodorizing sheet as described in any of [6][1] to [5], and a container for housing the deodorizing sheet. [7] The container is in the form 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, as described in [6]. [8] The back surface is provided with an adhesive portion for attaching an adhesive member, and the adhesive portion is formed as a protrusion that extends from the reference surface of the back surface, as described in [7]. [Effects of the Invention]

[0009] According to this disclosure, a deodorizing sheet and a deodorizing agent exhibiting good deodorizing performance are provided. [Modes for carrying out the invention]

[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. 2 By 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 deodorant composition may further contain other components such as a fungicide. As the fungicide, for example, silver zeolite or the like can be used. The deodorant composition typically further contains a binder. As the binder, for example, an acrylic binder can be used. In this case, the mass ratio of the acrylic binder to the total mass of the activated carbon and zinc aluminosilicate is not particularly limited, but is about 40:120 to 50:70.

[0015] As described above, the adhesion amount of the deodorant composition per unit area of the deodorant sheet is 70 to 120 g / m 2 as the total of the activated carbon and zinc aluminosilicate. This adhesion amount is based on the total amount of the activated carbon and zinc aluminosilicate in the deodorant composition, and does not include the amounts of other components such as the fungicide and the binder described above. This adhesion amount is more preferably 80 to 120 g / m 2 and even more preferably 90 to 120 g / m 2 If this adhesion amount is excessively small, sufficient deodorizing performance cannot be exhibited due to insufficient deodorizing components. If this adhesion amount is excessively large, the air permeability of the deodorant sheet may be impaired, and sufficient deodorizing performance may not be exhibited. Also, if this adhesion amount is excessively large, "powder dropping" of the deodorant composition from the deodorant sheet may occur, and the usability for the user may be impaired. That is, in the deodorant 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 deodorant sheet is ensured by a combination of the above requirements, but can also be further evaluated by the air permeability measured according to the Japanese Industrial Standard JIS L 1096 A method (Frazier method). The air permeability of the deodorant sheet measured by this method is preferably 60 cm 3 / cm 2 ·s or more, and more preferably 70 cm 3 / cm 2 ·s or more.

[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 the form of a thin plate having a front surface and a back surface, and an opening is provided on the front surface to enable access between the external space and the deodorizing sheet.

[0021] In this container, it is preferable that not only the front surface but also the back surface is provided with an opening. By adopting such a configuration, the air permeability from the front surface to the back surface is improved, and the deodorizing performance of the deodorizing sheet can be further exerted.

[0022] Furthermore, typically, an attachment portion for attaching an attachment member is provided on the back surface of the container. This enables the deodorant to be freely attached to a location such as the inner wall of a trash can. And it is particularly preferable that this attachment portion is formed as a convex portion protruding from the reference surface of the back surface of the container. By adopting such a configuration, a gap is generated between the back surface of the container and the attachment location, so that the air permeability from the front surface to the back surface in the container is further ensured, and the deodorizing performance of the deodorizing sheet can be further improved.

[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. [Examples]

[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 deodorant 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] [Table 1]

[0027] (Preparation of deodorizing sheets) A 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 a deodorizing sheet. The types of nonwoven fabrics used in each example are shown in Table 1 above.

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

[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 deodorizing sheets) 1. Deodorization test A deodorizing sheet prepared according to the above procedure was placed inside 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 Aromatic 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: Regarding all odor components 0.1 less than 100 minutes B: τ relating to any one of the malodorous components 0.1 One is 100 minutes or more but less than 200 minutes, the others are less than 100 minutes. C: τ relating to at least two malodorous components 0.1 One is 100 minutes or more but less than 200 minutes, the others are less than 100 minutes. D: τ relating to at least one malodorous component 0.1 over 200 minutes

[0031] 2. Powder fall test The deodorizing sheet obtained by the above procedure was dropped from a height of 1 meter onto a glass plate. The mass of the deodorizing sheet after the drop was measured, and the amount of mass that decreased 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, and the "powder shedding" was evaluated according to the following criteria. A: The mass of the deodorizing sheet that decreased after the fall was less than 1% of its mass before the fall. B: The mass of the deodorizing sheet that decreased after the fall was between 1% and 5% of its mass before the fall. C: The mass of the deodorizing sheet decreased by 5% or more after the fall.

[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. 2 It was less than [a certain value]. In this case, the evaluation of the deodorization test was C or lower, indicating insufficient deodorization performance.

[0034] In Comparative Example 5, the amount of deodorizing agent composition impregnated per unit area of ​​the deodorizing sheet was 120 g / m². 2 It exceeded the limit. In this case, the powder fall test evaluation was C, indicating a problem with the usability of the deodorizing sheet.

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

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

[0037] In contrast, in Examples 1 to 6, the amount of deodorizing agent composition impregnated per unit area of ​​the deodorizing sheet was 70 to 120 g / m², which is the sum of activated carbon and zinc aluminosilicate. 2 Furthermore, the mass ratio of activated carbon to zinc aluminosilicate was 3:7 to 8:2. In this case, sufficient performance was obtained in both the deodorization test and the powder shedding test. In particular, excellent deodorization performance was obtained in Examples 2 to 5. Moreover, in Examples 3 to 5, excellent deodorization performance and low powder shedding were achieved at a high level.

Claims

1. Nonwoven fabric and The deodorizing agent composition impregnated onto the nonwoven fabric, A deodorizing sheet containing, 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 the 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 contains an antifungal agent.

6. A deodorizing sheet according to claim 1 or 2, A container for housing the deodorizing sheet, A deodorizer containing [a specific ingredient / material].

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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