JP2014231916A - Duct with deodorization function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duct having sufficient heat insulation characteristics and sound absorbency characteristics as well as superior deodorization characteristics.SOLUTION: This invention comprises an inner tubular part 2 including span bond non-woven cloth with a thickness of 0.1 mm to 0.8 mm and basis weight of 30 g/mto 120 g/m, an intermediate tubular part 3 covering the inner tubular part 2 and an outer tubular part 4 covering the intermediate tubular part. The intermediate tubular part 3 includes glass wool with a thickness of 20 mm to 60 mm and a bulk density of 12 kg/mto 30 kg/m, deodorant fastening parts 5 having deodorant adhered through gravure printing are formed at a part of the inner circumferential surface of the inner tubular part 2 and a rate of area of a printed area 21 having deodorant printed in respect to an entire inner circumferential surface of the inner tubular part is in a range of 50% to 90%.

Description

  The present invention relates to a duct (duct hose) that is used as, for example, an air supply duct, an exhaust duct, and the like and has a sufficient heat insulating property and sound absorbing property and also has a deodorizing function.

  A flexible foam tape with an open-cell structure is spirally wound on the outer periphery of the inner wall that is formed by spirally winding a tape made of air-permeable material and connecting the side edges thereof and retaining the shape with a hard spiral reinforcement. An outer wall made of a flexible material is provided on the outer periphery of a sound-absorbing heat insulating layer formed by laminating a second foamed layer formed by spirally winding a first foamed layer formed by rotating and a soft foam tape having a closed cell structure. A duct hose provided with is known (see Patent Document 1).

  In the above conventional duct hose, heat insulation can be ensured by the second foam layer of the closed cell structure, so that it is possible to prevent condensation on the outer surface of the hose, and noise can be absorbed mainly by the first foam layer of the open cell structure. Can also be sufficiently reduced.

JP-A-8-219335

  By the way, for example, a duct connected to an air conditioning facility circulates indoor air through this duct hose. Therefore, an odor (derived from tobacco) contained in indoor air while air passes through the duct. If odors and other odors can be eliminated, the room can be maintained in a more comfortable space.

  However, the fact is that none of the conventional duct hoses has an excellent deodorizing function.

  This invention is made | formed in view of this technical background, Comprising: While providing sufficient heat insulation and sound absorption property, it aims at providing the duct which has the outstanding deodorizing property.

  In order to achieve the above object, the present invention provides the following means.

An inner tubular section containing [1] a basis weight in the thickness 0.1mm~0.8mm is a 30g / m ² ~120g / m ² spunbond nonwoven,
An intermediate tubular portion that is provided outside the inner tubular portion and covers the inner tubular portion;
An outer tubular portion provided outside the intermediate tubular portion and covering the intermediate tubular portion;
The intermediate tubular portion, the bulk density in thickness 20mm~60mm comprises glass wool of ^{12kg / m 3 ~30kg / m 3} ,
A deodorant is fixed to a part of the inner peripheral surface of the inner tubular portion by gravure printing, and the ratio of the area of the print area where the deodorant is printed to the entire inner peripheral surface of the inner tubular portion is 50%. A duct having a deodorizing function, characterized by being in a range of ˜90%.

[2] duct having a deodorizing function according to the above 1 weight fixation of deodorant is ^{1.5g / m 2 ~4.0g / m 2} .

[3] The deodorant is fixed to a part of the inner peripheral surface of the inner tubular portion with a binder resin,
Ducts amount sticking of the binder resin has a deodorizing function according to item 1 or 2 is ^{0.6g / m 2 ~1.6g / m 2} .

  [4] The duct having the deodorizing function according to item 3 above, wherein the fibers constituting the spunbonded nonwoven fabric are formed of a polyester resin, and a urethane binder resin is used as the binder resin.

  [5] The duct having the deodorizing function according to any one of the above items 1 to 4, wherein a thickness of a fiber constituting the spunbonded nonwoven fabric is in a range of 7.5 dtex to 15.0 dtex.

[6] The porous structure of the inner tubular portion made of spunbonded nonwoven fabric and the porous structure of the intermediate tubular portion made of glass wool are communicated with each other through an interface.
The duct which has a deodorizing function of any one of the preceding clauses 1-5 whose thickness (diameter) which comprises the said glass wool is the range of 1 micrometer-30 micrometers.

In the invention of [1], since the inner tubular portion including the spunbonded nonwoven fabric having a thickness of 0.1 mm to 0.8 mm and a basis weight of 30 to 120 g / m ² is provided, sufficient sound absorbing performance can be secured. Moreover, since the spun bond nonwoven fabric is used, the shape retention as a duct can be improved. The intermediate tubular portion disposed on the outside of the inner tubular portion, since the bulk density in thickness 20mm~60mm comprises glass wool of ^{12kg / m 3 ~30kg / m 3} , it can be ensured a sufficient thermal insulation, duct It is possible to prevent dew condensation from occurring on the outer peripheral surface. Furthermore, the deodorizer fixed to the inner peripheral surface of the inner tubular portion can deodorize air or the like passing through the flow path in the duct. Further, the deodorant is fixed to a part of the inner peripheral surface of the inner tubular portion by gravure printing, and the ratio of the area of the print region in which the deodorant is printed with respect to the entire inner peripheral surface of the inner tubular portion is 50% to Since it is in the range of 90%, a sufficient deodorizing performance can be obtained, and a sufficient movement of air to the inside of the spunbonded nonwoven fabric layer can be ensured to obtain a sufficient sound absorbing performance.

In the invention of [2], the deodorant fixing amount is 1.5 g / m ^{2 to} 4.0 g / m ² , and the deodorizing performance can be further improved by being 1.5 g / m ² or more. Light weight can be maintained by being 4.0 g / m ² or less.

In the invention [3], deodorant is a part of the inner peripheral surface of the inner tubular portion is secured with a binder resin, the amount sticking of the binder resin is at 0.6g / m ² ~1.6g / m ² is there. It is possible to sufficiently prevent the deodorant from falling off when it is 0.6 g / m ² or more, and it is possible to sufficiently expose the surface of the deodorant when it is 1.6 g / m ² or less. Performance can be improved.

  In the invention of [4], the fibers constituting the spunbonded nonwoven fabric are formed of a polyester-based resin, and a urethane-based binder resin is used as the binder resin. It is possible to further improve the adhering force to the skin, and to secure a sufficient deodorizing performance over a longer period of time.

  In the invention of [5], since the thickness of the fibers constituting the spunbonded nonwoven fabric is in the range of 7.5 dtex to 15.0 dtex, the molding process for forming the inner tubular portion is sufficiently possible. (Improved molding processability), it has a surface area that can fix the deodorant, and because it can ventilate the glass wool in the intermediate tubular part through the spunbonded nonwoven fabric, it absorbs sound with glass wool. The effect can be secured.

  In the invention of [6], the porous structure made of the spunbond nonwoven fabric in the inner tubular portion and the porous structure made of glass wool in the intermediate tubular portion communicate with each other via the mutual interface, and the fibers constituting the glass wool Since the thickness (diameter) of the fiber is in the range of 1 μm to 30 μm, the sound absorbing performance is sufficiently exhibited in the glass wool (intermediate tubular portion), which is also combined with the sound absorbing effect of the spunbond nonwoven fabric (inner tubular portion). Excellent sound absorption performance can be secured.

It is sectional drawing which shows one Embodiment of the duct which has the deodorizing function which concerns on this invention.

  One embodiment of a duct (duct hose) having a deodorizing function according to the present invention is shown in FIG. The duct 1 of the present invention includes an inner tubular portion 2 containing a spunbond nonwoven fabric, an intermediate tubular portion 3 provided outside the inner tubular portion 2 and covering the inner tubular portion 2, and an outer side of the intermediate tubular portion 3. And an outer tubular portion 4 that covers the intermediate tubular portion 3.

  In FIG. 1, reference numeral 10 denotes an internal space of the inner tubular portion 2, which is a flow path such as air. Moreover, in this embodiment, the porous structure by the spun bond nonwoven fabric of the said inner side tubular part 2 and the porous structure by the glass wool of the said intermediate | middle tubular part 3 are connecting via the mutual interface.

The inner tubular section 2, the basis weight is contained 30g / m ² ~120g / m ² spunbond nonwoven with a thickness 0.1Mm～0.8Mm.

  The thickness T of the spunbonded nonwoven fabric constituting the inner tubular portion 2 is set to 0.1 mm to 0.8 mm. If it is less than 0.1 mm, sufficient sound absorbing performance cannot be obtained, and if it exceeds 0.8 mm, the diameter of the duct increases and it becomes difficult to make it compact. Among these, the thickness T of the spunbonded nonwoven fabric constituting the inner tubular portion 2 is preferably set to 0.15 mm to 0.6 mm, and more preferably in the range of 0.2 mm to 0.4 mm.

Basis weight of the spunbonded nonwoven fabric constituting the inner tubular section 2 is set in a range of ^{30g / m 2 ~120g / m 2} . If it is less than 30 g / m ² , a sufficient surface area for fixing the deodorant cannot be secured (the deodorant cannot be fixed sufficiently), and if it exceeds 120 g / m ² , it becomes difficult to maintain light weight. . Above all, the basis weight of the spunbonded nonwoven fabric constituting the inner tubular portion 2 is preferably set in a range of ^{35g / m 2 ~100g / m 2} , particularly preferably further the range of 40g / m ² ~80g / m ² .

  Although it does not specifically limit as a fiber which comprises the said spun bond nonwoven fabric, For example, a polyethylene fiber, a polypropylene fiber, a polyester fiber, a polyamide fiber, rayon fiber etc. are mentioned.

  The thickness of the fibers constituting the spunbonded nonwoven fabric is preferably in the range of 7.5 dtex to 15.0 dtex. It is possible to improve the fixing power of the deodorant to the non-woven fabric by setting it to 7.5 decitex or more, and to enhance the durability of the deodorizing performance, and by reducing the deodorizing performance to 15.0 decitex or less, the sound absorbing performance is further improved. Can be improved. Especially, it is especially preferable that the thickness of the fiber which comprises the said spun bond nonwoven fabric is the range of 9.0 decitex-12.0 decitex.

The intermediate tubular portion 3, a bulk density in a thickness 20mm~60mm is comprising glass wool ^{12kg / m 3 ~30kg / m 3} .

  The thickness S of the glass wool layer constituting the intermediate tubular portion 3 is set to 20 mm to 60 mm. If it is less than 20 mm, sufficient heat insulating performance cannot be obtained, and if it exceeds 60 mm, the diameter of the duct increases and it becomes difficult to make it compact. Especially, it is preferable that the thickness S of the glass wool layer which comprises the said intermediate | middle tubular part 3 is set to 25 mm-50 mm.

The bulk density (apparent density) of the glass wool layer constituting the intermediate tubular portion 3 is set in the range of ^{12kg / m 3 ~30kg / m 3} . If it is less than 12 kg / m ³ , sufficient heat insulating performance cannot be obtained, and if it exceeds 30 kg / m ³ , it is difficult to maintain light weight. Among them, the bulk density of the glass wool layer forming the intermediate tubular portion 3 is preferably set in the range of ^{15kg / m 3 ~25kg / m 3} .

  The thickness (diameter) of the fibers constituting the glass wool layer is preferably in the range of 1 μm to 30 μm.

  The outer tubular portion 4 is not particularly limited, and examples thereof include a polyethylene sheet, a polypropylene sheet, an ethylene-methyl methacrylate copolymer resin sheet, and the intermediate tubular portion 3 is covered in a sealed state. There is no particular limitation as long as it is possible. The thickness W of the outer tubular portion 4 is preferably set to 0.05 mm to 0.3 mm.

  In the present invention, a deodorant is fixed to a part of the inner peripheral surface of the inner tubular portion 2 by gravure printing to form a deodorant fixing portion 5 (see FIG. 1). In FIG. 1, the deodorant fixing part 5 is formed in the printing area 21, and the deodorant fixing part 5 is not formed in the non-printing area 22. In the embodiment of FIG. 1, the print areas 21 and the non-print areas 22 are alternately arranged along the length direction of the duct 1. Since the deodorizing agent is fixed to the printing area 21, the air flowing through the flow path 10 comes into contact with the deodorizing agent in the printing area 21 and deodorization is performed. In addition, since the deodorizing agent and the binder resin are not attached to the non-printing region 22, the air flowing through the flow path 10 passes through the non-printing region 22 in the inner tubular portion (spunbond nonwoven fabric) 2. It gets inside and is absorbed here. In the present embodiment, since the deodorant and the binder resin are not attached to the inside of the inner tubular portion (spunbond nonwoven fabric) 2, the sound that has entered the inside is sufficiently absorbed here.

  In this invention, the ratio of the area of the printing area | region where the said deodorizer was printed with respect to the whole inner peripheral surface of the said inner side tubular part 2 is set to the range of 50%-90%. If it is less than 50%, a sufficient deodorizing effect cannot be secured, and if it exceeds 90%, a sufficient sound absorbing effect cannot be secured. Especially, it is preferable that the ratio of the area of the printing area | region where the said deodorizer was printed with respect to the whole inner peripheral surface of the said inner side tubular part 2 is the range of 60%-80%.

  The gravure printing pattern is not particularly limited, and any pattern may be used as long as the ratio of the area of the printing region can be set in the range of 50% to 90%. In addition to the stripe shape as shown in FIG.

  The deodorant fixing part 5 is printed with a deodorant composition containing a deodorant and a binder resin on one side of the spunbonded nonwoven fabric (the surface that becomes the inner peripheral surface when formed into a tubular shape) by gravure printing. It can be formed by drying.

Fixed amount of the deodorant is preferably ^{1.5g / m 2 ~4.0g / m 2} . The deodorizing performance can be further improved by being 1.5 g / m ² or more, and the lightness can be maintained by being 4.0 g / m ² or less.

Fixed amount of the binder resin is preferably ^{0.6g / m 2 ~1.6g / m 2} . It is possible to sufficiently prevent the deodorant from falling off when it is 0.6 g / m ² or more, and it is possible to sufficiently expose the surface of the deodorant when it is 1.6 g / m ² or less. Performance can be improved.

In addition, the area (which becomes the denominator) when calculating the fixed amount (g / m ² ) of the deodorant is the entire area of the inner peripheral surface of the inner tubular portion 2 (the area of the printing region 21 and the non-printing region 22). Of the total area). The same applies to the fixing amount (g / m ² ) of the binder resin.

  Although it does not specifically limit as said deodorizer, For example, the deodorizer containing a metal oxide, an amine compound, and a porous inorganic substance is suitable. Among them, as the deodorant, it is more preferable to use a deodorant containing at least one metal oxide selected from the group consisting of zinc oxide and iron oxide, a hydrazine derivative, and silica gel, In this case, formaldehyde odor and amine odor can be efficiently and sufficiently deodorized.

  Although it does not specifically limit as said binder resin, For example, urethane type resin, acrylic resin, ethylene-vinyl acetate copolymer resin etc. are mentioned.

  A solvent is usually mixed with the deodorant composition together with the deodorant and the binder resin. The solvent is not particularly limited, and examples thereof include water and ethanol. The deodorant composition is usually a liquid in which an emulsion is formed with a binder resin and a solvent, and the deodorant (particles) is dispersed in the solvent.

  The content of the deodorant in the deodorant composition is preferably set to 2% by mass to 30% by mass. The binder resin content in the deodorant composition is preferably set to 0.8 mass% to 12 mass%.

  Next, specific examples of the present invention will be described, but the present invention is not particularly limited to these examples.

<Example 1>
Formed with polyethylene terephthalate fiber with a thickness of 9.5 dtex, formed with a spunbond nonwoven fabric with a thickness of 0.25 mm and a basis weight of 40 g / m ² , and a glass fiber with a thickness (diameter) of 15 μm. Glass wool having a density of 16 kg / m ³ was prepared.

Next, a deodorant composition comprising 7 parts by mass of zinc oxide, 8 parts by mass of silica gel, 5 parts by mass of hydrazine derivative, 8 parts by mass of urethane binder resin, and 72 parts by mass of water is striped on one side of the spunbond nonwoven fabric. After gravure printing in a shape, drying was performed to obtain a spunbonded nonwoven fabric in which a deodorant was partially fixed on one side with a urethane-based binder resin. In the gravure printed spunbonded nonwoven fabric, the fixed amount of the deodorant was 2.0 g / m ² and the fixed amount of the binder resin was 0.8 g / m ² .

  The outside of the inner tubular portion 2 formed using the deodorant-fixed spunbond nonwoven fabric so that the deodorant-fixing surface is an inner peripheral surface is coated with the intermediate tubular portion 3 made of the glass wool, and further By covering the outer side of the tubular part with the outer tubular part 4 made of a polyethylene resin sheet having a thickness of 0.1 mm, the duct (inner diameter 100 mm, outer diameter 150 mm, length 10 m) having a deodorizing function shown in FIG. Obtained.

  In the obtained duct, the ratio of the area of the printing region 21 on which the deodorant is printed to the entire inner peripheral surface of the inner tubular portion is 70%, and the non-printing region 22 on which the deodorant is not printed. The area ratio was 30%.

<Example 2>
Deodorizing in the same manner as in Example 1 except that the ratio of the area of the printing region was changed to 55% and the area ratio of the non-printing area was changed to 45% by changing the setting of the printing area during gravure printing. A functional duct was obtained.

<Example 3>
Deodorizing in the same manner as in Example 1 except that the ratio of the area of the print area is 85% and the area ratio of the non-print area is 15% by changing the setting of the print area during gravure printing. A functional duct was obtained.

<Comparative Example 1>
Deodorizing in the same manner as in Example 1 except that the ratio of the area of the print area is changed to 10% and the area ratio of the non-print area is changed to 90% by changing the setting of the print area at the time of gravure printing. A functional duct was obtained.

<Comparative example 2>
Deodorizing in the same manner as in Example 1 except that the ratio of the area of the printing region was changed to 95% and the area ratio of the non-printing area was changed to 5% by changing the setting of the printing area at the time of gravure printing. A functional duct was obtained.

<Comparative Example 3>
The deodorant composition liquid of Example 1 was impregnated with a spunbonded nonwoven fabric having the same structure as Example 1, and then the nonwoven fabric was taken out and dried to fix the deodorant with the urethane-based binder resin. A duct having a deodorizing function was obtained in the same manner as in Example 1 except that the spunbond nonwoven fabric was obtained. The fixed amount of the deodorant in Comparative Example 3 is not calculated.

<Comparative example 4>
In place of the spunbond nonwoven fabric, a duct was formed in the same manner as in Example 1 using a needle punched nonwoven fabric formed of polypropylene fiber having a thickness of 8 dtex and a thickness of 1.0 mm and a basis weight of 70 g / m ² . However, the needle punched nonwoven fabric was broken at the time of molding, and the inner tubular portion could not be molded, and a duct could not be obtained. Therefore, various evaluations described later with respect to Comparative Example 4 are not performed. Moreover, the fixed amount of the deodorant in Comparative Example 4 was not calculated.

<Comparative Example 5>
In place of the spunbond nonwoven fabric, the same as in Example 1 except that a chemical bond nonwoven fabric formed of polyethylene terephthalate fiber having a thickness of 20 dtex and having a thickness of 5.0 mm and a basis weight of 150 g / m ² was used. A duct having an odor function was obtained.

  Each duct obtained as described above was evaluated based on the following evaluation method. The results are shown in Table 1.

<Deodorization performance evaluation method>
A 10 m long duct connected to the outlet of the blower (duct connection blower) was placed in a stainless steel chamber having a volume of 12 m ³ . Next, after the chamber is filled with air containing formaldehyde at 10 ppm and trimethylamine at a concentration of 10 ppm to make the chamber airtight, the air in the chamber is passed through the outlet of the fan by operating the fan. Air was continuously supplied into the duct at a wind speed of 6.0 m / sec for 3 hours. After the gas was fed into the duct for 3 hours, the concentration of formaldehyde and trimethylamine in the chamber were measured with a gas detector tube, and the odor removal rate (%) was determined by the following formula. In the following calculation formula, “h” is the formaldehyde concentration (ppm) after 3 hours of air supply, and “t” is the trimethylamine concentration (ppm) after 3 hours of air supply.

Formaldehyde removal rate (%) = {(10−h) / 10} × 100
Trimethylamine removal rate (%) = {(10−t) / 10} × 100
(Criteria)
“◯”: The average value of the formaldehyde removal rate and the trimethylamine removal rate is 90% or more.
“Δ”: The average value of formaldehyde removal rate and trimethylamine removal rate is 70% or more and less than 90%.
“X”: The average value of the formaldehyde removal rate and the trimethylamine removal rate is less than 70%.

<Sound absorption performance evaluation method>
One end opening of the duct with a length of 10m is brought close to the noise generating part of the air-conditioning equipment in operation (a sound with a magnitude of 90 dB is generated), and enters 10 cm inward from the other end opening inside the duct. The loudness of the sound heard at each position was measured, and the sound absorption performance of the duct was evaluated based on the following criteria.
(Criteria)
“◯”... Listening sound at the opening at the other end of the duct is 55 dB or less.
“Δ”: The volume of the listening sound at the opening at the other end of the duct is more than 55 dB and 75 dB or less.
“X”: The volume of the listening sound at the opening at the other end of the duct exceeds 75 dB.

<Insulation performance evaluation method>
In a 25 ° C. indoor atmosphere (air), after −10 ° C. cold air was allowed to flow at a wind speed of 6 m / second for 12 hours in a 10 m long duct 1, the presence or absence of condensation on the outer peripheral surface of the duct was examined. Evaluation was made based on the following criteria.
(Criteria)
“◯”: No condensation was observed on the outer peripheral surface of the duct.
“△”: Some condensation was observed on the outer peripheral surface of the duct.
“×”: Condensation was remarkably observed on the outer peripheral surface of the duct.

  As is apparent from the table, the ducts of Examples 1 to 3 have sufficient heat insulating properties and sound absorbing properties, and further have excellent deodorizing properties.

  On the other hand, in Comparative Example 1 in which the ratio of the area of the printing region is smaller than the lower limit of the specified range of the present invention, sufficient deodorizing performance was not obtained. Further, in Comparative Example 2 in which the area ratio of the printing region is larger than the upper limit of the specified range of the present invention, although sufficient deodorizing performance can be obtained, the sound absorbing performance is not good. In Comparative Example 3 in which the deodorant was fixed by the impregnation method, sufficient sound absorbing performance was not obtained. In Comparative Example 4 in which the inner tubular portion was formed of a needle punched nonwoven fabric, there was a problem that the nonwoven fabric was broken at the time of molding because the nonwoven fabric was insufficient in tensile strength and could not be molded into a duct shape. Moreover, in the comparative example 5 which formed the inner side tubular part with the chemical bond nonwoven fabric, since the air permeability of the nonwoven fabric was not enough, it was inferior to heat insulation performance and sound absorption performance.

  The duct having a deodorizing function according to the present invention is used as, for example, a duct for air conditioning equipment, but is not particularly limited to such an application.

DESCRIPTION OF SYMBOLS 1 ... Duct 2 ... Inner tubular part 3 ... Intermediate tubular part 4 ... Outer tubular part 5 ... Deodorant fixed part 21 ... Print area 22 ... Non-print area

Claims (6)

An inner tubular portion containing 30g / m ² ~120g / m ² spunbond nonwoven having a basis weight in the thickness 0.1Mm～0.8Mm,
An intermediate tubular portion that is provided outside the inner tubular portion and covers the inner tubular portion;
An outer tubular portion provided outside the intermediate tubular portion and covering the intermediate tubular portion;
The intermediate tubular portion, the bulk density in thickness 20mm~60mm comprises glass wool of ^{12kg / m 3 ~30kg / m 3} ,
A deodorant is fixed to a part of the inner peripheral surface of the inner tubular portion by gravure printing, and the ratio of the area of the print area where the deodorant is printed to the entire inner peripheral surface of the inner tubular portion is 50%. A duct having a deodorizing function, characterized by being in a range of ˜90%. Ducts amount fixation of the deodorant has a deodorizing function according to claim 1 is ^{1.5g / m 2 ~4.0g / m 2} . The deodorant is fixed to a part of the inner peripheral surface of the inner tubular portion with a binder resin,
Ducts amount sticking of the binder resin has a deodorizing function according to claim 1 or 2 is ^{0.6g / m 2 ~1.6g / m 2} .   The duct which has the deodorizing function of Claim 3 in which the fiber which comprises the said spun bond nonwoven fabric is formed with a polyester-type resin, and the urethane type binder resin is used as the said binder resin.   The duct having the deodorizing function according to any one of claims 1 to 4, wherein a thickness of a fiber constituting the spunbonded nonwoven fabric is in a range of 7.5 dtex to 15.0 dtex. The porous structure made of spunbonded nonwoven fabric of the inner tubular part and the porous structure made of glass wool of the intermediate tubular part are communicated with each other via the mutual interface,
The duct having the deodorizing function according to any one of claims 1 to 5, wherein a thickness of the fiber constituting the glass wool is in a range of 1 µm to 30 µm.

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