JP7383898B2 - Deodorant antifouling sheet - Google Patents

Description

The present invention relates to a deodorizing and stain-proofing sheet material used in environments where filth is involved, such as living environments and nursing/medical sites.
The deodorizing and antifouling sheet material of the present invention can be applied to products in various fields that require deodorizing and antifouling properties, especially in living environments where filth that emits or permeates odors is involved. It can be suitably used as a deodorizing and antifouling sheet material in nursing care and medical facilities.
For example, bedding covers, wall surface materials (wallpaper), partition curtains, window curtains, etc. can be produced from the deodorizing and stain-proofing sheet material.

Conventionally, sheets with gas (odor, water vapor, oxygen) permeability properties are known, but they can also be used as oxygen absorbers, desiccants, freshness-preserving agents, exothermic agents, moisture absorbers, deodorizers, insect repellents, dehumidifiers, or air fresheners. (Patent Document 1), and sheets that have deodorizing properties and drip absorption properties by mixing bamboo cotton and heat-soluble resin. However, the gas components that can be adsorbed by bamboo cotton are limited, and since it is composed only of a gas-permeable layer, it does not have antifouling properties, and there is a concern that liquid components will stain the back side of the sheet (Patent Document 2) It was something.
Therefore, it is desired to develop a laminate that has a gas permeable layer, gas adsorption properties, antifouling properties that do not allow moisture to pass through, and a diversity of gas components to be adsorbed.

Patent No. 6393571 Japanese Patent Application Publication No. 2010-143101

The present invention solves the above-mentioned problems, has excellent manufacturing suitability, has a simple layer structure, and is designed to remove leaked or scattered food and drinks such as juice, coffee, soy sauce, and sauce, as well as filth such as human waste and vomit. A deodorizing and antifouling sheet material capable of suppressing penetration of odor from the filth and deodorizing it, a deodorizing and antifouling sheet material produced from the deodorizing and antifouling sheet material, and a deodorizing and antifouling sheet The challenge is to provide the following.

As a result of various studies, the present inventors have found that a deodorizing and stain-proofing sheet material having a gas permeable layer made of a specific cloth, an extruded adhesive layer, and a deodorizing and stain-proofing layer achieves the above object. I found it.

That is, the present invention is characterized by the following points.
1. A deodorizing and stain-proofing sheet material having at least a gas permeable layer, an extruded adhesive layer, and a deodorizing and stain-proofing layer,
The gas permeable layer is the outermost layer on one side of the deodorizing and antifouling sheet, and is a layer made of cloth using a fiber material,
The extrusion adhesive layer contains a polyolefin resin,
the gas permeable layer and the extruded adhesive layer are adjacent;
A deodorizing and antifouling sheet material, wherein the deodorizing and antifouling layer contains a deodorant and a thermoplastic resin.
2. The deodorant is characterized in that it contains one or more selected from the group consisting of an inorganic odor decomposer, an inorganic porous material, and a chemical odor adsorbent.
The deodorizing and stain-proofing sheet material described in 1 above.
3. In the deodorizing and antifouling layer, the content of the deodorant in the layer containing the deodorant is 0.1% by mass or more and 30% by mass or less,
The deodorizing and antifouling sheet material according to 1 or 2 above.
4. The deodorant is characterized in that the maximum particle size is 25 μm or less, and the number average particle size is 0.05 μm or more and 20 μm or less.
The deodorizing and antifouling sheet material according to any one of 1 to 3 above.
5. The deodorizing and antifouling layer has a water vapor permeability of 2000 g/m ² /day or less,
The deodorizing and antifouling sheet material according to any one of 1 to 4 above.
6. A deodorizing and stain-proofing sheet material produced from the deodorizing and stain-proofing sheet material according to any one of 1 to 5 above.
7. A deodorizing and stain-proofing sheet made from the deodorizing and stain-proofing sheet material according to any one of items 1 to 5 above.

The deodorizing and stain-proofing sheet material of the present invention, the deodorizing and stain-proofing sheet material produced from the deodorizing and stain-proofing sheet material of the present invention, and the deodorizing and stain-proofing sheet have excellent manufacturing suitability and have a simple layer structure. It is possible to suppress the penetration of odor from leaked or scattered food and drinks such as juice, coffee, soy sauce, sauce, etc., filth itself such as human waste and vomit, and to deodorize it.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing an example of the layer structure of the deodorizing and stain-proofing sheet material of the present invention. FIG. 2 is a schematic cross-sectional view showing an example of another embodiment of the layer structure of the deodorizing and antifouling sheet material of the present invention.

In each figure, the sizes and proportions of members may be changed or exaggerated for ease of understanding. Further, for ease of viewing, parts unnecessary for explanation or repetitive symbols may be omitted.

The deodorizing and stain-proofing sheet material of the present invention, the deodorizing and stain-proofing sheet material produced from the deodorizing and stain-proofing sheet material of the present invention, and the deodorizing and stain-proofing sheet will be described in more detail below. Although the present invention will be explained by showing specific examples, the present invention is not limited thereto.

<<Deodorizing and antifouling sheet material>>
The deodorizing and antifouling sheet material of the present invention suppresses the penetration of leaked or scattered food and beverages such as juice, coffee, soy sauce, and sauces, as well as odors such as human waste and vomit, and odors from such filth. It is a sheet material that can smell and has excellent deodorizing and stain resistance.
The deodorizing and antifouling sheet material is a laminate having at least a gas permeable layer, an extrusion adhesive layer, and a deodorizing and antifouling layer, and the gas permeable layer is a surface layer on one side of the deodorizing and antifouling sheet material. , and adjacent to the extruded adhesive layer.
Deodorizing and antifouling sheet materials have, for example, processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardance, anti-mold properties, electrical properties, Various plastic compounding agents, additives, etc. can be contained for the purpose of improving and modifying strength and the like. The content can be arbitrarily determined from a trace amount to several tens of percent depending on the purpose.
In the above, common additives include anti-blocking agents, lubricants, cross-linking agents, antioxidants, ultraviolet absorbers, light stabilizers, fillers, reinforcing agents, antistatic agents, pigments, and modifying resins. etc. can be contained.

[Method for producing deodorizing and antifouling sheet material]
The deodorizing and antifouling sheet material can be produced by laminating a prefabricated film constituting the gas permeable layer and a film constituting the deodorizing and antifouling layer via an extrusion adhesive layer. preferable.
For example, on the adhesive surface of a gas permeable layer prepared in advance, a composition for an extrusion adhesive layer that has been melted by heating is expanded and stretched in the required width direction using a T-die, extruded in a curtain shape, and allowed to flow down. While controlling the thickness of the adhesive layer, a deodorizing and antifouling layer or the like can be stacked and pressed between a rubber roll and a cooled metal roll, allowing for adhesion and lamination at the same time.

Moreover, in order to improve the adhesion between the layers constituting the deodorizing and antifouling sheet material, the surface of each layer can be subjected to a desired surface treatment in advance, if necessary.
For example, pretreatment such as corona discharge treatment, ozone treatment, low-temperature plasma treatment using oxygen gas or nitrogen gas, glow discharge treatment, oxidation treatment using chemicals, etc. is optionally performed to form a corona treatment layer, ozone treatment, etc. A layer, a plasma treatment layer, an oxidation treatment layer, etc. can be formed and provided.
Alternatively, various coating agent layers such as a primer coating agent layer, an undercoating agent layer, an anchor coating agent layer, an adhesive layer, and a vapor-deposited anchor coating agent layer can be arbitrarily formed on the surface to form a surface treatment layer.

The various coating agent layers mentioned above include, for example, polyester resins, polyamide resins, polyurethane resins, epoxy resins, phenol resins, (meth)acrylic resins, polyvinyl acetate resins, and polyolefins such as polyethylene or polypropylene. Resin compositions in which the main component of the vehicle is a resin, a copolymer or modified resin thereof, a cellulose resin, etc. can be used.

<Gas permeable layer>
The gas permeable layer is a layer made of gas permeable cloth using a fiber material. The gas-permeable fabric may be a non-woven fabric or a woven fabric, but a non-woven fabric is preferred.
The gas permeable layer is a layer that allows gases such as moisture, air, and odors to pass through. It does not need to have deodorizing properties, antifouling properties, or waterproof properties.
The gas permeable layer may have a single layer structure, or may be composed of two or more layers having the same or different structures.
The basis weight of the cloth constituting the gas permeable layer is preferably 10 to 200 g/m ² . If it is smaller than the above range, the strength of the gas permeable sheet will tend to decrease and it will be difficult to obtain stable processing characteristics.If it is larger than the above range, the gas permeability will tend to decrease and further If the rigidity of the product becomes too high, the range of application as a product may be limited.

[Fiber material constituting the gas permeable layer]
As the fibers used for the gas permeable layer, any known material can be used as long as it can have high lamination strength between the gas permeable layer and the extrusion adhesive layer.
Specific examples of fiber materials used for the gas permeable layer include cotton, silk, wool, linen, pulp, polyethylene fiber, polypropylene fiber, polystyrene fiber, polyester-polyethylene double structure fiber, pulp-polyethylene-polypropylene composite fiber, and Examples include combination use of these.
Among the above-mentioned fiber materials, pulp, polyethylene fiber, polyester-polyethylene double structure fiber, and pulp-polyethylene-polypropylene composite fiber are preferable because they have good adhesive properties.

<Extrusion adhesive layer>
The extrusion adhesive layer is an adhesive layer formed by extrusion, and preferably contains a polyolefin resin.
Specific examples of polyolefin resins include low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), polypropylene (PP), linear low density polyethylene (LLDPE), and ethylene. - Low-carbon materials such as vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methylmethacrylic acid copolymer, ethylene-propylene copolymer, etc. Included are eluted ones and mixtures of these resins.
Among the above, polyethylene resins are preferred, and among the polyethylene resins, LDPE and/or LLDPE are more preferred, and LDPE is even more preferred.

<Deodorizing and antifouling layer>
The deodorizing and antifouling layer is a layer that has a deodorizing effect and an antifouling property, and contains a deodorant and a thermoplastic resin.
The water vapor permeability of the deodorizing and antifouling layer is preferably 2000 g/m ² /day or less. If the water vapor permeability is higher than the above range, there is a risk that odor and sewage will pass through the deodorizing and antifouling layer. The lower the lower limit, the more preferable it is, and the most preferable is 0 g/m ² /day.
Further, the deodorizing and antifouling layer may have heat-sealing properties, and in that case, it is preferable to contain a thermoplastic resin having heat-sealing properties.
The deodorizing and antifouling layer may have a single layer structure, or may be composed of two or more layers having the same or different structures. For example, it may be composed of a deodorizing layer containing a deodorant and a heat sealing layer that does not contain a deodorizing layer but contains a thermoplastic resin and has excellent heat sealability. In particular, when forming the deodorizing and antifouling layer from a deodorizing and antifouling film, laminating a heat seal layer on both sides of the deodorizing and antifouling film provides excellent adhesion during lamination. When the layer can be easily formed and the deodorizing and antifouling layer is a surface layer, a deodorizing and antifouling sheet material with excellent heat sealability can be obtained.

[Deodorants]
The deodorant preferably contains one or more selected from the group consisting of inorganic odor decomposers, inorganic porous materials, and chemical odor adsorbents. When the filth is human waste, the odor components contain hydrogen sulfide and ammonia, and the above-mentioned deodorizer can efficiently deodorize these odor components. It is preferable to select a deodorant depending on the type of odor of the filth contained in the container. Moreover, deodorants other than those mentioned above can also be used in combination, if necessary.
When the above deodorant is used in powder form, the maximum particle diameter of the powder is preferably 25 μm or less, and the number average particle diameter is preferably 0.05 μm or more and 20 μm or less. When the number average particle size is smaller than the above range, the deodorant tends to aggregate, and when the maximum particle size or number average particle size is larger than the above range, the film or layer thickness is less than 25 μm. Particles larger than the thickness or layer thickness are likely to be present, resulting in poor homogeneity, and deodorizing performance is also likely to be poor, and lamination strength and heat seal strength are likely to be reduced.

The content of the deodorant in the layer containing the deodorant is preferably 0.1% by mass or more and 30% by mass or less. If the amount is less than the above range, it will be difficult to exhibit sufficient deodorizing properties, and if the amount is more than the above range, the deodorizing properties will not be particularly improved and the lamination strength and heat seal strength will tend to decrease.

(Inorganic odor decomposer)
Examples of inorganic odor decomposers include metal-supported inorganic oxides, metal oxides, salts consisting of metal cations and inorganic acid anions mixed with metal oxides, and specifically, phosphate copper glass. and a mixture of calcined alum (AlK(SO ₄ ) ₂ ) with CaO and ZnO.
The inorganic odor decomposer exhibits a catalytic action that promotes the decomposition reaction of sulfur-based malodorous substances by ionizing the metal components in the inorganic odor decomposer.
Powdered metal-supported inorganic oxides are produced by mixing raw materials such as metal oxides and phosphorus compounds, melting and homogenizing the same method used to make general-purpose glass such as bottle glass, and pulverizing after cooling. It can be obtained by making it into a powder and supporting a metal salt on it. Alternatively, the metal salts may be premixed together before melting the raw materials.

(Inorganic porous material)
An inorganic porous material is a substance that has many pores on its surface, and includes, for example, activated clay, activated bentonite, zeolite, zirconium compounds, silicon dioxide, silicates, activated carbon, titania, inorganic phosphates such as calcium phosphate, etc. , alumina, aluminum hydroxide, magnesium hydroxide, and mixtures thereof.

Activated clay is a type of clay that is porous, has a large specific surface area, and has excellent adsorption properties, and is obtained by heat-treating naturally occurring acidic clay whose main component is montmorillonite with an inorganic acid such as sulfuric acid or hydrochloric acid.
Among the above, activated clay, activated bentonite, and zeolite are preferably used from the viewpoint of odor adsorption performance, pore size effective for the molecular size and cluster size of odorous substances, and safety.
The activated clay preferably has a large specific surface area, and although there is no particular restriction on the specific surface area, those having a specific surface area of 50 to 400 m ² /g are easily available. The pH (5% suspension) is preferably 2.5 to 9, more preferably 3 to 7.

Activated bentonite is made by adding several wt% of sodium carbonate to Ca-type bentonite to artificially change it into Na-type bentonite, and exhibits properties close to those of Na-type bentonite.
Here, bentonite is mainly composed of montmorillonite, which is a clay mineral, and contains minerals such as quartz ^{and feldspar} as impurities. Bentonite is roughly divided into two types.

Zeolite is a substance whose main components are SiO ₂ /Al ₂ O _3. Generally, the higher the molar ratio of SiO ₂ / _{Al 2} O ₃ , the higher the hydrophobicity. A hydrophobic zeolite having an Al ₂ O ₃ molar ratio of 30/1 to 8000/1 is preferred.
Hydrophobic zeolite does not lose its odor adsorption ability even when the sheet or sheet material is exposed to temperatures of 230° C. or higher, and can exhibit a deodorizing effect by adsorbing odorous substances.
Because hydrophobic zeolite is hydrophobic, it has difficulty adsorbing highly polar water molecules, and on the contrary, it has an affinity for low polarity, such as odor molecules, hydrophobic gases, and lipophilic gases (including solvent gases). is high and easily adsorbs these substances. Further, due to the effects of alkali metals and alkaline earth metals such as Ca, Na, and K present on the zeolite surface, the zeolite surface exhibits basicity and easily adsorbs acidic gases through a neutralization reaction.

(chemical odor adsorbent)
In the present invention, a chemical odor adsorbent is a compound having a reactive functional group that causes a chemical reaction with an odorous substance and binds to it. For example, it binds to odorous substances such as various aldehydes, ketones, and carboxylic acids. It is a compound that has a reactive functional group.
At this time, due to chemical adsorption, the odor substance once adsorbed will not be desorbed, and odor adsorption can be carried out efficiently.
Furthermore, unlike physical adsorbents, where odor and water vapor are adsorbed to the same adsorption site, odorants bind to specific functional groups of chemical odor adsorbents, and therefore various substances that reduce the odor adsorption capacity, e.g. Not easily affected by water vapor, etc.

Such chemical odor adsorbents include compounds containing amino groups, such as polyamines such as alkylamines and tetramethylene diamine, ethanolamine, piperidine, and compounds having basic functional groups such as hydroxyl groups, such as sodium hydroxide. , hydroxides such as potassium hydroxide, magnesium hydroxide, iron hydroxide, carbonates such as sodium carbonate, sodium hydrogen carbonate, calcium carbonate, hydrogen carbonates, amide groups such as 2-acrylamido-2-methylpropanesulfonic acid, etc. Examples include, but are not limited to, containing compounds.
For example, the hydroxyl group of the chemical odor adsorbent causes a chemical reaction with the carboxyl group of the odor substance, and the amino group of the chemical odor adsorbent causes a chemical reaction with the aldehyde group of the odor substance, making it easier to adsorb odor substances. .
Among the above, compounds having an amino group, such as polyamines such as ethylenediamine, diethylenetriamine, triethylenetriamine, tetraethylenepentamine, piperazine, and metaphenylenediamine, exhibit particularly excellent adsorption effects.

The chemical odor adsorbent is preferably supported on an inorganic porous material. Among the above-mentioned inorganic porous materials, zeolite and zirconium compounds are preferred as the inorganic porous material to be supported.
As the supporting method, a known or commonly used supporting method can be applied. For example, the inorganic porous material can be impregnated with a solution containing a chemical odor adsorbent, and the inorganic porous material can be supported by drying.
By supporting the chemical odor adsorbent on an inorganic porous body, the adsorption capacity per unit mass of the chemical odor adsorbent can be greatly increased, and the content of the chemical odor adsorbent in the laminate can be reduced. In addition, physical adsorption properties to the pores of the inorganic porous material can be expected. Moreover, the chemical odor adsorbent can be handled as a powder.

[Thermoplastic resin in deodorizing and antifouling layer]
In the deodorizing and antifouling layer, polyolefin resins are preferred as thermoplastic resins that can disperse deodorants, exhibit water vapor permeability as described above, and have excellent antifouling properties and heat sealability. Among the polyethylene resins, polyethylene resins are more preferred, and among the polyethylene resins, LLDPE or LDPE is even more preferred.

<<Deodorizing and antifouling sheet materials>>
The deodorizing and antifouling sheet material is a sheet material produced using the deodorizing and antifouling sheet material of the present invention, and has deodorizing and antifouling properties, and may also have heat sealability if necessary. can.
Specific examples of deodorizing and stain-proofing sheet materials include rolls of deodorizing and stain-proofing sheet materials.

<<Deodorizing and antifouling sheet>>
The deodorizing and antifouling sheet is a sheet produced using the deodorizing and antifouling sheet material of the present invention, and has deodorizing properties and antifouling properties, and can also have heat sealability if necessary.

<Raw materials>
The main raw materials used in the examples of the present invention are as follows.
[Deodorants]
(chemical odor adsorbent)
- Chemical odor adsorbent 1: Kesmon NS-241, an amino group-containing compound-supported inorganic porous material manufactured by Toagosei Co., Ltd. Average particle size 3.5 μm.
- Chemical odor adsorbent 2: Hydroxyl group-supported zirconium, Kesmon NS-80E manufactured by Toagosei Co., Ltd. Average particle size: 2 μm.
- Chemical odor adsorbent 3: manufactured by Toagosei Co., Ltd., zirconium phosphate compound, Kesmon NS-10. Average particle size 1 μm.
(Inorganic odor decomposer)
- Inorganic odor decomposer 1: manufactured by Ishizuka Glass Co., Ltd., copper blended glass, Deogra. Average particle size = 3-4 μm.
- Inorganic odor decomposer 2: Manufactured by Sinanen Zeomic Co., Ltd. Copper oxide/zinc oxide composite aluminosilicate, Dashlight CZU. Average particle size = 3-5 μm.
- Inorganic odor decomposer 3: Masterbatch Dime Shoe manufactured by Dainichiseika Kagyo Co., Ltd., a mixture of AlK(SO ₄ ) ₂ , CaO and ZnO/LDPE at a mass ratio of 30/70.
(Inorganic porous material)
- Inorganic porous material 1: manufactured by Mizusawa Chemical Industry Co., Ltd., activated clay, Galleon Earth SH. Average particle size = 5 μm.
- Inorganic porous material 2: Silton MT100, manufactured by Mizusawa Chemical Industry Co., Ltd. SiO ₂ /AL ₂ O ₃ molar ratio = 100/1, average particle diameter 3 to 4.5 μm.

[Gas permeable cloth]
- Gas permeable fabric 1: ELVES, manufactured by Unitika Co., Ltd., basis weight: 40 g/m ² , spunbond type, polyester-polyethylene double structure fiber.
- Gas permeable fabric 2: Sunmore Soft, manufactured by Sanwa Paper Co., Ltd., basis weight: 70 g/m ² , long fiber wet nonwoven fabric type, pulp-polyethylene-polypropylene composite fiber.
- Gas permeable fabric 3: Eclair 3401A, Toyobo, basis weight: 40 g/m ² , spunbond type, polyester fiber.
[Heat-sealable thermoplastic resin, thermoplastic resin, EC adhesive]
- LLDPE1: Urtozex 1520L, manufactured by Prime Polymer Co., Ltd. LLDPE, density 0.916 g/cm ³ , MFR=2.3. Water vapor transmission rate 23g/m ² /day. (Evaluated using 50 μm film).
- LDPE1: Novatec LC600A, manufactured by Japan Polyethylene Co., Ltd. LDPE, density 0.918 g/cm ³ , MFR=7.0.
- LDPE2: Novatec LC520, LDPE manufactured by Japan Polyethylene Co., Ltd., MFR: 3.6 g/10 minutes, density 0.923 g/cm ³ .

<Preparation of masterbatch>
A masterbatch was prepared as follows.
[Adjustment of master batch 1]
Masterbatch 1 (MB1) was obtained by melt blending LDPE 1 and chemical odor adsorbent 1 in the following proportions.
LDPE1 90 parts by mass Chemical odor adsorbent 1 10 parts by mass [Adjustment of masterbatches 2 to 13]
According to the formulation in Table 1, melt blending was performed in the same manner as masterbatch 1 to obtain masterbatches 2 to 12 (MB2 to 13).

<Example 1>
[Production of film for deodorizing and antifouling layer]
MB1, MB2, MB3 obtained above and LLDPE1 were dry blended in the following proportions to obtain a mixture for a deodorizing layer.
Masterbatch 1 16.7 parts by mass Masterbatch 2 33.3 parts by mass Masterbatch 3 33.3 parts by mass LLDPE 1 16.7 parts by mass Then, the mixture obtained above and LLDPE 1 for heat seal layer 1 were mixed into 160 parts by mass. The films were laminated by inflation film formation at a temperature of 0.degree. C. to obtain a deodorizing and antifouling layer film 1 having the following three-layer structure.
Heat seal layer 1 (10 μm) / Deodorant layer (30 μm) / Heat seal layer 2 (10 μm)
[Preparation and evaluation of deodorizing and antifouling sheet]
Next, the gas-permeable fabric 1 for the gas-permeable layer and the film 1 for the deodorizing and antifouling layer obtained above were adhered at 320°C by an extrusion coating method using LDPE 1, and the following layer structure was obtained. A deodorizing and antifouling sheet was obtained and its deodorizing performance and antifouling properties were evaluated.
Ta.
Gas permeable layer (40 g/m ² )/extruded adhesive layer (15 μm)/deodorizing and antifouling layer [heat sealing layer 1 (10 μm)/deodorizing layer (30 μm)/heat sealing layer 2 (10 μm)]

<Examples 2 to 10>
A masterbatch and materials for the deodorizing and antifouling layer sheet were selected and used according to the description in Table 2, and the same operations as in Example 1 were performed to prepare a deodorizing and antifouling layer sheet. The antifouling properties were evaluated.

<Comparative example 1>
Using only the gas permeable cloth 1, the deodorizing performance and antifouling properties were evaluated in the same manner as in Example 1.
<Comparative example 2>
A film for a deodorizing and antifouling layer having a thickness of 50 μm was obtained by film forming LLDPE1 by inflation at 160°C. Using the deodorizing and antifouling layer film and gas permeable cloth 1, the same operations as in Example 1 were performed to create a deodorizing and antifouling layer sheet, and the deodorizing performance and antifouling properties were similarly evaluated. .
<Comparative example 3>
Except for using the gas permeable cloth 3, the same operations as in Example 1 were performed to prepare an antifouling sheet, and the odor adsorption performance and antifouling properties were similarly evaluated.

<Result summary>
The deodorizing and antifouling sheets of Examples of the present invention exhibited good lamination properties, deodorizing properties, and antifouling properties. On the other hand, Comparative Examples 1 to 3, which do not fall under the present invention, showed insufficient performance in any of the deodorizing properties, antifouling properties, and laminating properties.

<Evaluation method>
[Laminate characteristics]
○: Good adhesion between the gas permeable layer/deodorizing and antifouling layer via the extruded adhesive layer.
×: Adhesion between the gas permeable layer/deodorizing and antifouling layer via the extruded adhesive layer is weak and easily peeled off.

[Deodorizing performance]
Cut the deodorizing and antifouling sheet into 20 x 20 cm pieces, put 1000 ml into a gas sampling bag (layer structure: IB-PET-PIR 12 μm/adhesive layer/ONy 15 μm/adhesive layer/LLDPE film 60 μm), and observe the change in odor after leaving it for 2 days. was measured by sensory evaluation. The odor components were adjusted to be 200 ppm of acetaldehyde, 30 ppm of acetic acid, 20 ppm of hydrogen sulfide, and 30 ppm of ammonia.
The evaluation criteria are as follows: 1 = No change in odor compared to the initial stage 2 = Slightly reduced odor compared to the initial stage 3 = Significantly reduced odor compared to the initial stage 4 = No odor at all

[Antifouling properties]
With the gas permeable layer side of the deodorizing and antifouling sheet facing inside, seal it on all sides with an impulse sealer to create a 13 cm x 17 cm pouch. Fill the pouch with 100 ml of water to prevent leakage after storing for 1 hour. The presence or absence of was evaluated.
○: There was no water leakage from the pouch, and the filled water was maintained.
×: Water leaked from the pouch.

1 Deodorizing and antifouling sheet 2 Gas permeable layer 3 Extruded adhesive layer 4 Deodorizing and antifouling layer 4a Heat sealing layer 4b Deodorizing layer

Claims (7)

A deodorizing and stain-proofing sheet material having at least a gas permeable layer, an extrusion adhesive layer, and a deodorizing and stain-proofing layer in this order,
The gas permeable layer is the outermost layer on one side of the deodorizing and antifouling sheet material , and is a layer made of cloth using a fiber material,
The extrusion adhesive layer contains a polyolefin resin,
The gas permeable layer is a surface layer on one side of the deodorizing and antifouling sheet material, and is a layer made of cloth using a fiber material,
The fabric weight of the cloth using the fiber material is 10 to 200 g/m ² ,
The fiber material is a polyester-polyethylene double structure fiber or a pulp-polyethylene-polypropylene composite fiber,
the gas permeable layer and the extruded adhesive layer are adjacent;
A deodorizing and antifouling sheet material, wherein the deodorizing and antifouling layer contains a deodorant and a thermoplastic resin. The deodorant is characterized in that it contains one or more selected from the group consisting of an inorganic odor decomposer, an inorganic porous material, and a chemical odor adsorbent.
The deodorizing and antifouling sheet material according to claim 1. The content of the deodorant in the deodorizing and antifouling layer is 0.1% by mass or more and 30% by mass or less,
The deodorizing and antifouling sheet material according to claim 1 or 2. The deodorant is characterized in that the maximum particle size is 25 μm or less, and the number average particle size is 0.05 μm or more and 20 μm or less.
The deodorizing and antifouling sheet material according to any one of claims 1 to 3. The deodorizing and antifouling layer has a water vapor permeability of 2000 g/m ² /day or less,
The deodorizing and antifouling sheet material according to any one of claims 1 to 4. A deodorizing and stain-proofing sheet material produced from the deodorizing and stain-proofing sheet material according to any one of claims 1 to 5. A deodorizing and stain-proofing sheet produced from the deodorizing and stain-proofing sheet material according to any one of claims 1 to 5.

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