Performance evaluation method for stationary air fresheners

Abstract

To provide an evaluation method that can judge the performance when an aroma component of a stationary type aroma agent adheres to interior material such as wallpaper, floor, curtain, and sofa fabric.SOLUTION: Provided is an evaluation method, which is a method for evaluating the performance exhibited when the aroma component of a stationary type aroma agent adheres to interior material, and includes a first step in which a test piece is placed in an atmosphere in which the aroma component of the stationary type aroma agent is volatilized to create a test piece with the aroma component adhered, a second step in which the test piece adhered with the aroma component prepared in the first step is placed in the atmosphere filled with malodor, and a third step in which the odor of the test piece after the second step is evaluated.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a method for evaluating the performance of a fragrance component of a stationary air freshener when it is attached to an interior material. [Background technology]

[0002] In recent years, due to factors such as airtight housing and a more Westernized (meat-eating) diet, various unpleasant odors such as body odor are increasingly found in indoor spaces. To eliminate the unpleasant odors and create a comfortable indoor space, air fresheners containing fragrance ingredients are widely used.

[0003] Conventionally, air fresheners are known in various types, such as stationary, spray, and aerosol types. Among these types, stationary types are widely accepted by consumers because they can continuously volatilize the air freshener simply by being placed in the room, thereby creating and maintaining a comfortable space.

[0004] On the other hand, air fresheners not only have the ability to impart fragrance to a space with the fragrance of the evaporated fragrance, but also have the ability to mask unpleasant odors with the fragrance, depending on the type of fragrance used. Therefore, in the development of air fresheners, it is necessary to properly evaluate the air freshener's air freshener performance and deodorizing performance. In particular, in the case of stationary air fresheners, the evaporated fragrance components not only float in the space but also exhibit their air freshener and deodorizing performance by adhering to interior materials such as wallpaper, floors, curtains, and sofa fabrics. Therefore, it is desirable to properly evaluate the air freshener's air freshener performance and deodorizing performance when the fragrance components of the stationary air freshener are attached to the interior materials.

[0005] Various methods for evaluating the efficacy of volatile agents such as air fresheners, deodorants, and anti-odors have been reported. For example, the Association of Air Fresheners, Deodorants, and Anti-odors has created "Voluntary Standards for Air Fresheners, Deodorants, and Anti-odors for General Consumers," which defines methods for evaluating the efficacy of air fresheners, etc. In addition, Patent Document 1 proposes a method for evaluating the deodorizing performance of a deodorant that is used by placing it in a bag containing an odor-emitting substance.

[0006] However, no evaluation method has been reported to date that can properly determine the fragrance and deodorizing performance exhibited when a fragrance component volatilized from a stationary air freshener adheres to an interior material. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 2019-205631 Summary of the Invention [Problem to be solved by the invention]

[0008] An object of the present invention is to provide an evaluation method capable of determining the performance of a fragrance component of a stationary air freshener when it is attached to interior materials such as wallpaper, floors, curtains, and sofa fabric. [Means for solving the problem]

[0009] The present inventors have conducted extensive research to solve the above-mentioned problems and have found that the performance of a stationary air freshener when attached to an interior material can be determined by first placing a test piece in an atmosphere in which the fragrance component of a stationary air freshener has been vaporized for a predetermined period of time to produce a test piece with the vaporized fragrance component attached, and then placing the test piece with the vaporized fragrance component attached for a predetermined period of time in an atmosphere filled with a malodor and then evaluating the odor of the test piece.The present invention was completed based on this finding and through further research.

[0010] That is, the present invention provides the following aspects. Item 1. A method for evaluating the performance of a fragrance component of a stationary air freshener when attached to an interior material, A first step is to place a test piece in an atmosphere in which the fragrance component of a stationary air freshener has been evaporated, thereby creating a test piece with the fragrance component attached; A second step of placing the test piece with the fragrance component attached thereto prepared in the first step in an atmosphere filled with a malodor; and The third step is to evaluate the odor of the test piece after the second step. Evaluation methods, including: Item 2. The evaluation method according to Item 1, wherein the test piece is a cut sheet of wallpaper. Item 3. The evaluation method according to Item 1 or 2, wherein the first step is carried out while ventilating the space. Item 4. The first step is carried out in a box-shaped space surrounded by a floor, sides, and a ceiling, 4. The evaluation method according to any one of items 1 to 3, wherein in the first step, a test piece is placed on at least one of the floor surface, the side surface, and the ceiling surface. Item 5. The evaluation method according to Item 4, wherein in the first step, test pieces are placed on at least one location on the side surface, at least one location on the bottom surface, and at least one location on the ceiling surface. Item 6. The first step is carried out in a box-shaped space surrounded by a floor, sides, and a ceiling, and the ceiling is provided with a ventilation device; The air in the box-shaped space is discharged from the ceiling surface by the ventilation device, Item 3. The evaluation method according to item 1 or 2, wherein in the first step, a test piece is placed only on at least one location on the side surface and at least one location on the bottom surface. Item 7. The evaluation method according to any one of Items 1 to 6, wherein in the third step, a sensory evaluation of the odor is performed on the test piece after the second step. Item 8. The evaluation method according to Item 7, wherein the odor prevention performance and fragrance performance are determined by evaluating the malodor intensity and pleasantness of the odor in the sensory evaluation. [Effects of the Invention]

[0011] According to the evaluation method of the present invention, it is possible to determine the deodorizing and aromatic properties exhibited when the fragrance components evaporated from a stationary air freshener adhere to interior materials such as wallpaper, and therefore it is possible to easily select an air freshener that combines excellent deodorizing and aromatic properties by utilizing the evaluation method of the present invention. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram of a box-shaped space used in Test Example 2. DETAILED DESCRIPTION OF THE INVENTION

[0013] The evaluation method of the present invention is a method for evaluating the performance of a fragrance component of a stationary air freshener when attached to an interior material, and is characterized by comprising the following steps: a first step of placing a test piece in an atmosphere in which the fragrance component of the stationary air freshener has been vaporized to prepare a test piece with the fragrance component attached; a second step of placing the test piece with the fragrance component attached prepared in step 1 in an atmosphere filled with a malodor; and a third step of evaluating the odor of the test piece after step 2. The evaluation method of the present invention will be described in detail below.

[0014] [Evaluation target] The evaluation method of the present invention is a method for evaluating the performance exhibited when the fragrance component of a stationary air freshener volatilizes and adheres to an interior material.

[0015] In the present invention, a "stationary air freshener" refers to an air freshener that is left in a space such as a toilet, a room, a car, a shoe cabinet, or a closet and is allowed to volatilize. The stationary air freshener to be evaluated in the present invention may be an air freshener that contains a deodorizing component in addition to a fragrance component. Furthermore, the form of the stationary air freshener to be evaluated in the present invention is not particularly limited, and it may be in any form such as a liquid or gel. Furthermore, in the evaluation method of the present invention, the stationary air freshener to be evaluated may be a known product or may be a hitherto unknown development candidate.

[0016] The evaluation method of the present invention can evaluate the fragrance performance (ability to impart fragrance) and / or deodorizing performance (ability to mask malodors) when a stationary air freshener volatilizes and the fragrance component adheres to an interior material. In the present invention, the interior material refers to an interior material used in a space where a stationary air freshener is installed, and examples include wallpaper, flooring, curtain fabric, sofa fabric, etc.

[0017] [Test piece] In the present invention, a test piece is an object to which the volatilized fragrance component of a stationary air freshener is attached. In the evaluation method of the present invention, the test piece is used as a simulation of an interior material, and the performance of the fragrance component volatilized from the stationary air freshener when attached to the test piece is evaluated.

[0018] The test piece may be any piece that simulates an interior material, such as a cut sheet of an interior material, or a sheet made of the same material as the interior material, such as a textile product, a resin sheet, a leather sheet, or a wooden sheet. When the test piece is a cut sheet of wallpaper or a sheet made of the same material as wallpaper, the evaluation method of the present invention makes it possible to evaluate the performance of the evaporated fragrance component when it adheres to the wallpaper.

[0019] The size of the test piece should be within the range that allows for the odor evaluation in the third step described below. For example, a test piece of 10 cm 2 More than 50cm 2 Less than 20cm, preferably 2 More than 40cm 2 Less than 25cm, preferably 2 More than 36cm 2 The following are included:

[0020] [Step 1] In the first step, a test piece is placed in a space where the fragrance component of the stationary air freshener has evaporated, creating a test piece to which the fragrance component evaporated from the stationary air freshener has adhered.

[0021] In the first step, the space used may be any space capable of forming a space in which a test piece can be placed, and examples thereof include a sealed bag, a container with a lid, a box-shaped space, and the like. A box-shaped space is a space surrounded by a floor, sides, and a ceiling. The volume of the space in which the fragrance component of a stationary air freshener is evaporated is not particularly limited, and may be, for example, 5 L or more, preferably 5 L to 5000 L. Specifically, when a space in which a test piece is placed is simply formed using a sealed bag, a container with a lid, or the like, the volume of the space is, for example, preferably 6 L to 10 L. Furthermore, in the case of a box-shaped space, the volume of the space may be, for example, 5 L to 5000 L.

[0022] Furthermore, if a box-shaped space is used as the space for volatilizing the fragrance components of a stationary air freshener, and the volume and shape of the box-shaped space are made to be similar to the space in which the stationary air freshener to be evaluated is installed, it becomes possible to evaluate the performance of the stationary air freshener in a state close to actual use. For example, when a stationary air freshener to be used in a home toilet is to be evaluated, the volume should be about 1000 L or more and 5000 L or less, preferably about 2000 L or more and 4000 L or less, more preferably about 2500 L or more and 3000 L or less; the base area should be 1.0 m 2 Over 3.0m 2 Approximately 1.0m or less, preferably 1.0m 2 Over 2.0m 2 Approximately 1.0m or less, preferably 1.0m 2 More than 1.5 m 2 It is sufficient to use a box-shaped space of this size.

[0023] Furthermore, the space into which the fragrance component of the stationary air freshener is diffused may be a space where the stationary air freshener is actually installed, such as a toilet, a living room, a closet, a shoe cabinet, or the inside of a car.

[0024] The location where the test piece is placed in the space is not particularly limited, and may be set appropriately depending on the type of space it is used in. For example, in the case of a box-shaped space, the performance of the stationary air freshener exhibited for each location where the test piece is placed can be evaluated, so the location where the test piece is placed may be set depending on the location within the space where the performance of the stationary air freshener is to be evaluated.

[0025] In the case of a box-shaped space, the test piece may be placed in at least one location on the bottom, side, and ceiling, preferably at least one location on the side, more preferably at least one location on the side and at least one location on the bottom and ceiling, and even more preferably at least one location on the side, at least one location on the bottom, and at least one location on the ceiling. For example, in a relatively small living space such as a toilet, since bad odors attached to the wall surface are easily detected, placing the test piece on at least one location on the side of the box-shaped space makes it possible to more appropriately evaluate the performance that will be perceived in actual use in that living space.

[0026] To place the test piece in the space, it is sufficient to fix the test piece in a predetermined place using adhesive, adhesive tape, etc. Also, when placing the test piece on the bottom surface, it is sufficient to simply place the test piece.

[0027] In order to place the test piece in a space where the fragrance component of a stationary air freshener has volatilized, the stationary air freshener may be placed in the space where the test piece is placed, in a state where the fragrance component can volatilize. In addition, in cases where it is not possible to place a stationary air freshener in the space, air from which the fragrance component has volatilized from the stationary air freshener may be prepared in advance, and this air may be introduced into the space where the test piece is placed.

[0028] In the first step, the time for which the test piece is placed in the space where the fragrance components of the stationary air freshener have evaporated can be any time that allows the evaporated fragrance components to adhere to the test piece, and can be set appropriately depending on the volume of the space used, etc., but can be, for example, approximately 10 hours or more and 100 hours or less, preferably approximately 12 hours or more and 80 hours or less, and more preferably approximately 12 hours or more and 72 hours or less.

[0029] The first step may also be carried out while ventilating the space. Living spaces such as toilets and rooms are typically ventilated. Therefore, in the first step, by contacting the test piece with the fragrance component volatilized from the stationary air freshener while ventilating the space, it is possible to evaluate the performance of the stationary air freshener under conditions that more closely resemble those experienced in actual use. In the case of a box-shaped space, it is preferable that a ventilation device be installed on the ceiling, and that the air in the box-shaped space be exhausted from the ceiling by the ventilation device. When the first step is carried out while ventilating the space, the ventilation rate per hour can be, for example, 5 to 20 times, preferably 7.5 to 15 times, and more preferably 8 to 12 times. Here, the ventilation rate per hour refers to the number of times per hour that all of the air in the space is replaced with outside air.

[0030] The test piece thus prepared to which the fragrance component is attached is subjected to the following second step.

[0031] [Second Step] In the second step, the test piece to which the fragrance ingredient prepared in the first step is attached is placed in a space filled with a malodor.

[0032] The space in which the second step is performed may be the same space in which the first step was performed, but it is desirable to remove the test piece from the space used in the first step and perform the second step in a space different from that used in the first step.

[0033] The space used in the second step may be any space that can form a space in which a test piece can be placed, and examples thereof include those capable of sealing the internal space, such as a sealed bag, a container with a lid, etc. The volume of the space used in the second step is not particularly limited, and examples thereof include about 5 L or more, preferably about 5 L to 15 L, and more preferably about 7.5 L to 12 L.

[0034] To place the test piece in the space, the test piece may be placed in the space, or the test piece may be fixed in the space using an adhesive, adhesive tape, or the like.

[0035] To place a test piece in a space filled with a malodor, the malodorous component is introduced into the space where the test piece is placed. The type of malodorous component to be introduced is preferably one that can be present in the space where the performance of a stationary air freshener is to be evaluated, specifically, trimethylamine, triethylamine, methyl mercaptan, hydrogen sulfide, methyl sulfide, acetaldehyde, butyric acid, isovaleric acid, acetic acid, etc. The amount of malodorous component introduced into the space may be set, for example, so that the malodorous component concentration in the space is approximately 0.001 ppm to 100 ppm, preferably approximately 0.1 ppm to 100 ppm, and more preferably approximately 1 ppm to 10 ppm. Before introducing the malodorous component into the space where the test piece is placed, it is desirable to replace the air in the space with odorless air.

[0036] In the second step, the time for which the test piece is placed in the space filled with the malodor may be set appropriately taking into consideration the type and amount of malodor components being introduced, but may be, for example, from 1 hour to 12 hours, preferably from 1 hour to 6 hours, and more preferably from 1 hour to 3 hours.

[0037] The test strip thus contacted with the malodor is subjected to the third step below.

[0038] [Third Step] In the third step, the test piece after the second step is removed and its odor is evaluated.

[0039] The odor evaluation may be carried out by measuring the level of malodor of the test piece using a measuring device such as an odor sensor, but it is desirable to conduct a sensory evaluation of the odor of the test piece in order to analyze in detail the odor actually perceived.

[0040] The sensory evaluation may be performed, for example, using at least one of malodor intensity and pleasantness of the scent as evaluation items. The malodor intensity may be evaluated by evaluating the degree of malodor perceived from the test piece, and the deodorizing performance of the stationary air freshener being evaluated can be determined based on the evaluation results. The pleasantness of the scent may be evaluated by evaluating the pleasantness of the overall scent perceived from the test piece, and the fragrance performance of the stationary air freshener being evaluated can be determined based on the evaluation results. The sensory evaluation is preferably performed by multiple people trained in scent testing, and the evaluation results are preferably scored for each evaluation item. For example, the malodor intensity may be scored according to the Odor Intensity Rating Method, and the pleasantness of the scent may be scored according to the Pleasantness / Discomfort Rating Method.

[0041] Furthermore, it is preferable that the odor evaluation in the third step is carried out by preparing a test piece that has been subjected to only the second step as a control and comparing it with the control.

[0042] Based on the results of the odor evaluation in the third step, the performance of the fragrance components emitted from the stationary air freshener when they adhere to interior materials can be judged. For example, the higher the degree of odor suppression of the test specimen, the better the stationary air freshener is judged to be able to exhibit odor prevention performance, and the more pleasant the odor of the test specimen, the better the stationary air freshener is judged to have fragrance performance. [Example]

[0043] The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

[0044] Test Example 1 Four types of liquid stationary air fresheners A to D with different ingredients were prepared, and the performance of the air fresheners attached to wallpaper was evaluated using the following method. Stationary air fresheners A and C have the same scent. Stationary air freshener A contains more fragrance ingredients to enhance deodorizing performance than stationary air freshener C. Stationary air fresheners B and D have the same scent. Stationary air freshener B contains more fragrance ingredients to enhance deodorizing performance than stationary air freshener D.

[0045] Wallpaper (sticker-type wallpaper, option: pattern: SW-34 Frisch, manufactured by Asahipen Co., Ltd.) was cut into a 5 cm x 5 cm square to serve as a test specimen. The test specimen was attached with masking tape to the inside of a 6 L bag, with the wallpaper surface facing outward. Each stationary air freshener was placed in a 10 L air bag with a cock (manufactured by GL Sciences) in a state that allowed it to volatilize, and the bag was sealed and degassed. Next, 5 L of odorless air that had been passed through activated carbon was filled into the 10 L air bag with a cock and left to stand for 1 hour, thereby preparing air from which the fragrance components of the stationary air freshener had volatilized. Next, the entire amount of air from which the fragrance components of the stationary air freshener had volatilized was introduced into the bag with the test specimen attached inside, and the bag was sealed and left to stand for 1 hour to prepare a test specimen with the fragrance components attached.

[0046] Next, the test piece with the fragrance attached was removed from the bag and attached with masking tape to the inside of a new 10L airbag with a tap, with the wallpaper surface facing out.The 10L airbag with a tap was then sealed and evacuated, after which 5L of odorless air that had been passed through activated carbon was filled in, and triethylamine was further introduced into the airbag to make the triethylamine concentration in the airbag 1000ppm, and the airbag was left to stand in a sealed state for 1 hour.As a control, a test piece with no fragrance attached was also left to stand in the triethylamine space under the same conditions.

[0047] The test specimens were then removed from the airbags and subjected to a sensory evaluation of the odor intensity and the pleasantness / unpleasantness of the odor using a six-level odor intensity rating system and a pleasantness / unpleasantness rating system ranging from -2.0 to +2.0. The sensory evaluation was carried out by eight trained panelists, and an average score was calculated for each evaluation item. The evaluation criteria for the six-level odor intensity rating system and pleasantness / unpleasantness rating system are shown below. <6-level odor intensity rating system (bad odor intensity rating criteria)> 0: Odorless 1: Smell that can barely be detected (detection threshold) 2: Weak odor that can be identified (recognition threshold) 3: Smells that can be easily detected 4: Strong odor 5: Strong odor <Comfort / Discomfort Indication Method (Comfort / Discomfort Evaluation Criteria)> +2: pleasure +1: Somewhat comfortable 0: Neither pleasant nor unpleasant -1: Slightly uncomfortable -2: Unpleasant

[0048] The results are shown in Table 1. Comparing the results of stationary air freshener A and stationary air freshener C, which have the same scent, the improvement in score for stationary air freshener A was greater. Comparing the results of stationary air freshener B and stationary air freshener D, which have the same scent, the improvement in score for stationary air freshener B was greater. These results confirmed that the evaluation method of the present invention can be used to evaluate the deodorizing performance of a stationary air freshener when its fragrance component adheres to wallpaper.

[0049] [Table 1] #The score improvement is the difference between the control score and the score of each stationary air freshener.

[0050] Test Example 2 The liquid stationary air fresheners A to D used in Test Example 1 were prepared, and the performance of the air fresheners attached to wallpaper was evaluated by the following method.

[0051] Wallpaper (sticker-type wallpaper, option: pattern: SW-34 Frisch, manufactured by Asahipen Co., Ltd.) was cut into a 5 cm x 5 cm square to prepare a test piece.

[0052] A box-shaped space (bottom: 90 cm x 130 cm square, height: 220 cm) with a bottom, sides, and ceiling was prepared. A schematic diagram of the box-shaped space is shown in Figure 1. Although not shown in Figure 1, the box-shaped space has a door on the front side and a ventilation system installed on the ceiling. The door is a single-leaf door. The door's support (hinge) is on the right side when viewed from the outside of the box-shaped space. Outside air flows into the box-shaped space through the gap in the door and is exhausted from the ceiling by the ventilation system. Test specimens were attached with masking tape to five locations within the box-shaped space: one location on the bottom, three locations on the sides, and one location on the ceiling, with the wallpaper facing outward. Details of the locations where the test specimens were attached are shown in Table 2.

[0053] [Table 2]

[0054] The ventilation conditions in the box-shaped space were adjusted to a wind speed of 0.36 m / s (ventilation rate 9 times / hour), and the temperature and humidity in the box-shaped space were maintained at 22.5°C and 40%RH, respectively. Each stationary air freshener was left overnight on a shelf in the box-shaped space in a state where it could volatilize, to create a test specimen with the fragrance components of the stationary air freshener attached. Note that when the stationary air freshener was left overnight, the door to the box-shaped space was kept closed.

[0055] Next, the test piece with the fragrance component attached was removed from the box-shaped space and attached with masking tape to the inside of a 10L airbag with a tap, with the wallpaper surface facing outward.The 10L airbag with a tap was then sealed and evacuated, after which 5L of odorless air passed through activated carbon was filled in, and triethylamine was further introduced into the airbag to make the triethylamine concentration in the airbag 1000 ppm, and the airbag was left to stand in a sealed state for 1 hour.In addition, as a control, a test piece without any fragrance component attached was also left to stand in the triethylamine space under the same conditions.The control was a test piece to which triethylamine was attached without undergoing the process of attaching the fragrance component of a stationary air freshener in the box-shaped space.

[0056] The test specimens were then removed from the airbags and subjected to a sensory evaluation of the odor intensity and the pleasantness / unpleasantness of the odor using a 6-level odor intensity rating system and a pleasantness / unpleasantness rating system ranging from -2.0 to +2.0. The sensory evaluation was performed by eight trained panelists, and the average score was calculated for each evaluation item. The evaluation criteria for the 6-level odor intensity rating system and pleasantness / unpleasantness rating system were the same as those in Test Example 1.

[0057] The results are shown in Table 3. Comparing the results of stationary air fresheners A and C, both of which have the same fragrance, the improvement in the score for stationary air freshener A was greater. Comparing the results of stationary air fresheners B and D, both of which have the same fragrance, the improvement in the score for stationary air freshener B was greater. These results also confirmed that the evaluation method of the present invention can be used to evaluate the deodorizing performance of the fragrance components of a stationary air freshener when attached to wallpaper. In particular, these results confirmed that by using a box-shaped space similar in shape to a household toilet and attaching the fragrance components of a stationary air freshener to wallpaper, it is possible to evaluate the deodorizing and fragrance performance of the fragrance components attached to each location in the box-shaped space. As shown in Table 2, by placing test specimens on multiple surfaces within the box-shaped space, it was confirmed that the fragrance components of the stationary air freshener were evenly attached to each surface of the ventilated space. For this reason, it is desirable to place test specimens on at least one side, at least one bottom, and at least one ceiling. Furthermore, the results shown in Table 3 indicate that the improvement in scores for the bottom and side surfaces tends to be lower than the improvement in scores for the top surface. As long as test pieces are placed on at least the bottom and side surfaces, it is possible to evaluate the deodorizing performance of the fragrance components of a stationary air freshener. Therefore, by placing test pieces on at least one side surface and at least one bottom surface, the evaluation test can be completed in a shorter time without reducing the evaluation accuracy.

[0058] [Table 3] #The score improvement is the difference between the control score and the score of each stationary air freshener.

Claims

1. A method for evaluating the performance of a fragrance component of a stationary air freshener when attached to an interior material, comprising: A first step is to place a test piece in an atmosphere in which a fragrance component of a stationary air freshener has been evaporated, thereby preparing a test piece to which the fragrance component has been attached; A second step of placing the test piece with the fragrance component attached thereto prepared in the first step in an atmosphere filled with a malodor; and A third step of evaluating the odor of the test piece after the second step. Evaluation methods, including:

2. The evaluation method according to claim 1 , wherein the test piece is a cut sheet of wallpaper.

3. The evaluation method according to claim 1 or 2, wherein the first step is carried out while ventilating the space.

4. The first step is carried out in a box-shaped space surrounded by a bottom surface, a side surface, and a ceiling surface, 4. The evaluation method according to claim 1, wherein in the first step, a test piece is placed on at least one of the bottom surface, the side surface, and the ceiling surface.

5. The evaluation method according to claim 4 , wherein in the first step, test pieces are placed on at least one location on the side surface, at least one location on the bottom surface, and at least one location on the ceiling surface.

6. the first step is carried out in a box-shaped space surrounded by a bottom surface, a side surface, and a ceiling surface, and the ceiling surface is provided with a ventilation device; The air in the box-shaped space is discharged from the ceiling surface by the ventilation device, The evaluation method according to claim 1 or 2, wherein in the first step, test pieces are placed only on at least one location on the side surface and at least one location on the bottom surface.

7. The evaluation method according to any one of claims 1 to 6, wherein in the third step, a sensory evaluation of the odor of the test piece after the second step is performed.

8. The evaluation method according to claim 7, wherein the odor prevention performance and the fragrance performance are determined by evaluating the malodor intensity and the pleasantness of the smell in the sensory evaluation.

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