JP7226025B2 - deodorant film - Google Patents

Description

The present invention provides a deodorizing film containing a deodorant for containing waste, a deodorizing film further containing an adhesive resin and having self-adhesiveness, and a deodorizing film produced from the deodorant film. , self-deodorizing packaging material, deodorizing packaging body, deodorizing packaging material, and deodorizing packaging bag.
The deodorant film according to the present invention can be applied to products in various fields that require deodorant properties, and can be particularly suitably used as a packaging material for containing waste. For example, it can be used to store human waste, vomit, and paper or cloth impregnated with them, garbage, organic fertilizer, and the like.

2. Description of the Related Art Conventionally, as a packaging bag for containing human waste, vomit, and paper or cloth impregnated with these substances, garbage, organic fertilizer, etc., a packaging bag made by heat-sealing polyethylene has been widely used. (Patent document 1)
Alternatively, a method of packing in a cardboard box together with a deodorant has been adopted. (Patent document 2)
Furthermore, a packaging bag made by mixing lignin sulfonate as a deodorant with resin has been proposed, but the deodorant effect could be exhibited only in a limited pH range. (Patent document 3)

JP-A-07-329988 JP-A-10-147385 Japanese Patent Application Laid-Open No. 2005-200557

The present invention solves the above-mentioned problems, is excellent in manufacturing suitability, has a simple layer structure, and is capable of accommodating human waste, vomit, and filth such as paper and cloth impregnated with these, garbage, organic fertilizer, etc. provides a deodorizing film having extremely excellent deodorizing properties, a deodorizing film further having excellent self-adhesiveness, and packaging materials, packages, packaging materials, and packaging bags made from the deodorizing film. The task is to

As a result of various investigations, the present inventors have found that a film containing a deodorant and a specific adhesive resin achieves the above objects.

That is, the present invention is characterized by the following points.
1. A deodorant film for containing waste,
The deodorant film contains at least a deodorant,
The deodorant is characterized by containing one or more selected from the group consisting of inorganic porous bodies, metal-supporting inorganic substances, and inorganic odor decomposing agents.
deodorant film.
2. The deodorant film further contains an adhesive resin and has self-adhesiveness,
The adhesive resin is an adhesive LLDPE with a density of 0.88 g/cm ³ or more and 0.915 g/cm ³ or less,
1. The deodorant film as described in 1 above.
3. The pressure-sensitive adhesive surfaces of the deodorant films were placed facing each other, and after applying a pressure of 0.18 MPa at 40° C. for 12 hours, the adhesive strength was 1. characterized by being 5 N / 15 mm or more,
2. The deodorizing film according to 2 above.
4. The deodorant film has a deodorant layer and an adhesive layer,
The deodorant layer is a layer containing the deodorant,
The adhesive layer does not contain the deodorant but contains the adhesive resin and is a surface layer on one side of the deodorant film,
4. The deodorizing film according to 2 or 3 above.
5. The deodorant has a maximum particle size of 20 μm or less and a number average particle size of 0.1 μm or more and 15 μm or less,
The deodorizing film according to any one of 1 to 4 above.
6. The content of the deodorant in the layer containing the deodorant is 0.1% by mass or more and 30% by mass or less,
6. The deodorizing film according to any one of 1 to 5 above.
7. A deodorizing packaging material, characterized by being produced using the deodorizing film according to any one of 1 to 6 above.
8. 8. A deodorizing packaging material produced using the deodorizing packaging material according to 7 above.
9. 8. A deodorizing package produced using the deodorizing packaging material according to 7 above.
10. 8. A deodorizing packaging bag produced using the deodorizing packaging material according to 7 above.

The deodorant film of the present invention is excellent in manufacturing suitability and has a simple layer structure, but when it accommodates human waste, vomit, and waste such as paper and cloth soaked with these, garbage, organic fertilizer, etc. In addition, the excellent self-adhesiveness makes it possible to exhibit excellent dirt-receiving capacity.
In addition, the packaging material, package, packaging material, and packaging bag produced from the deodorant film of the present invention can exhibit the deodorant properties derived from the deodorant film while having a simple layer structure. can exhibit the capacity.

1 is a schematic cross-sectional view showing an example of the layer structure of the deodorizing film of the present invention. FIG. FIG. 4 is a schematic cross-sectional view showing another example of the layer structure of the deodorizing film of the present invention. FIG. 4 is a schematic cross-sectional view showing an example of another embodiment of the layer structure of the deodorant film of the present invention.

In each drawing, the sizes and ratios of members may be changed or exaggerated for the sake of clarity. In addition, for the sake of clarity, parts that are not necessary for explanation and symbols that are repeated may be omitted.

The deodorant film, deodorant packaging material, deodorant package, deodorant packaging material, and deodorant packaging bag of the present invention are described in more detail below. The present invention will be described by showing a specific example, but the present invention is not limited to this.

<Deodorizing film>
The deodorizing film of the present invention is a film for containing waste and has excellent deodorizing properties.
The deodorant film contains at least a specific deodorant and a thermoplastic resin. Moreover, an adhesive resin and a heat-sealable resin can be contained as needed.
In addition, if necessary, the deodorant film is further strengthened by
It can also have a support layer on one side.
In order to exhibit self-adhesiveness, the adhesive resin is preferably contained in the surface layer on one side of the deodorant film.
The deodorant film exhibits deodorizing properties by containing a deodorant. By further containing a heat-sealing resin, heat-sealing properties and bag-making properties can be further exhibited, and by further containing an adhesive resin, self-adhesiveness can be further exhibited, and further excellent storage can be achieved. You can show your sexuality.
Examples of waste to be accommodated include human waste, vomit, garbage, organic fertilizer, and other odor-generating waste.

The deodorant film may have a single-layer structure, or may have two or more layers with the same or different compositions.
For example, there may be a layer containing a deodorant and a layer not containing a deodorant. Then, the deodorant and the adhesive resin may be contained in the same layer, a layer containing the deodorant but not the adhesive resin, or a layer containing the adhesive resin but not the deodorant. A layer may be present, but in order for the deodorant film to exhibit self-adhesiveness, it is preferable that at least one surface layer of the deodorant film contains an adhesive resin.

The deodorant film has, for example, processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slip properties, release properties, flame retardancy, antifungal properties, electrical properties, strength, etc. Various plastic compounding agents, additives, etc. can be contained for the purpose of improvement and modification. The content can be arbitrarily selected from a very small amount to several tens of percent depending on the purpose.
In the above, examples of general additives include antiblocking agents, lubricants, cross-linking agents, antioxidants, ultraviolet absorbers, light stabilizers, fillers, reinforcing agents, antistatic agents, pigments, and modifying resins. etc. can be contained.

Although the thickness of the deodorant film is not particularly limited, it is preferably 10 μm or more and 100 μm or less. If the thickness is less than the above range, the rigidity is too low, it is easy to break, and it is difficult to exhibit a sufficient deodorizing effect. easy to become

The deodorizing film can be produced by laminating prefabricated films constituting each layer via an adhesive layer, or by (co)extrusion laminating a melted resin composition on a prefabricated layer. Alternatively, multiple layers may be simultaneously produced and laminated by melt pressure bonding, or one or more resins may be coated on another layer by applying and drying.
For example, it can be carried out by conventionally used film forming methods such as (co)extrusion method, cast molding method, T-die method, cutting method, inflation method and/or lamination method.
The deodorant film and/or each layer constituting the deodorant film can be uniaxially or biaxially stretched using a tenter method, a tubular method, or the like, if necessary. Monoaxial stretching or biaxial stretching can be performed by a conventionally known method.

Moreover, in order to improve the adhesiveness between the layers constituting the deodorant film, 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 applied to the corona treatment layer and ozone treatment. Layers, plasma-treated layers, oxidation-treated layers, etc. can be formed and provided.
Alternatively, various coating agent layers such as a primer coating agent layer, an undercoat agent layer, an anchor coating agent layer, an adhesive layer, and a vapor deposition anchor coating agent layer can be arbitrarily formed on the surface to serve as the surface treatment layer.

The above various coating agent layers include, for example, polyester-based resins, polyamide-based resins, polyurethane-based resins, epoxy-based resins, phenol-based resins, (meth)acrylic-based resins, polyvinyl acetate-based resins, and polyolefins such as polyethylene and polypropylene. A resin composition containing a base resin, a copolymer thereof, a modified resin, a cellulose resin, or the like as a main component of a vehicle can be used.

(Thermoplastic resin)
The deodorant film preferably contains a polyolefin-based resin in consideration of the dispersibility of the deodorant, heat-sealability, and mixing with other heat-sealable resins and adhesive resins.
Specific examples of polyolefin resins include low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), and ethylene-vinyl acetate copolymer. ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylic acid copolymer, ethylene-propylene copolymer, etc. and mixtures of these resins mentioned.
Among these resins, polyethylene-based resins are preferred. Among polyethylene-based resins, LDPE, LLDPE, general-purpose PE, PE-based copolymers, and the like are more preferred, and LLDPE is even more preferred.

(Heat sealable resin)
As the heat-sealable resin, any known resin can be used without particular limitation as long as it can be melted and fused by heat.
Specific examples of heat-sealable resins include polyethylene, low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, metallocene polyethylene, polypropylene, ethylene-vinyl acetate copolymer, and ionomer. Resin, ethylene-(meth)ethyl acrylate copolymer, ethylene-(meth)acrylic acid copolymer, ethylene-propylene copolymer, methylpentene polymer, polyolefin resin such as polyethylene or polypropylene, acrylic acid, methacrylic acid , maleic anhydride, polyolefin resins modified with unsaturated carboxylic acids such as fumaric acid, ethylene-(meth)acrylic acid ester-unsaturated carboxylic acid terpolymer resins, cyclic polyolefin resins, cyclic olefin copolymers, Examples include polyethylene terephthalate (PET) and polyacrylonitrile (PAN).
Among these, polyolefin-based resins are preferable, polyethylene-based resins are more preferable, and low-density polyethylene and linear low-density polyethylene are more preferable.
Further, the thermoplastic resin for dispersing the adhesive resin and/or the deodorant can also serve as the heat-sealable resin.

[Support layer]
The support layer is a layer that is included as necessary, for example, it is included to supplement the rigidity of the deodorant film, is included as a surface layer on one side of the deodorant film, and is used when the deodorant film is rolled or stacked. In addition, it is preferably non-tacky to prevent blocking.
As the resin contained in the support layer, LDPE and LLDPE are preferable.
Although the thickness of the support layer is not particularly limited, it is preferably 1 μm or more and 50 μm or less. If the thickness is less than the above range, it is difficult to exhibit the effect of reinforcing the rigidity, and if the thickness is greater than the above range, the rigidity is too high, and the usability as a packaging material or packaging material is likely to deteriorate.
The support layer can contain an adhesive resin or a heat-sealable resin.

[Deodorant layer]
The deodorant layer is a layer containing a deodorant and also contains a thermoplastic resin for dispersing the deodorant. Moreover, you may contain adhesive resin.
Although the thickness of the deodorant layer is not particularly limited, it is preferably 5 μm or more and 50 μm or less. If it is thinner than the above range, it is difficult to exhibit a sufficient deodorant effect, and if it is thicker than the above range, the deodorant effect does not improve so much, and the rigidity of the deodorant film becomes too strong, making it difficult to use as a packaging material or packaging material. Easy to use.

[Deodorants]
The deodorant preferably contains one or more selected from the group consisting of inorganic porous bodies, metal-supporting inorganic substances, and inorganic odor decomposing agents. When the waste is human waste, the odorous components include hydrogen sulfide and ammonia, and the above deodorant can efficiently deodorize these odorous components. It is preferable to select the composition of the deodorant according to the type of odor of the filth of the contents.
Moreover, deodorant other than the above can also be used together as needed.
The above deodorants are used in the form of powder, and the maximum particle size of the powder is preferably 20 µm or less, and the number average particle size is preferably 0.1 µm or more and 15 µm or less. If the number average particle size is smaller than the above range, the deodorant tends to agglomerate, and if the maximum particle size or number average particle size is larger than the above range, a film or layer thickness of 20 μm or less may cause the film to become brittle. Particles larger than the thickness or layer thickness are likely to be present, resulting in poor homogeneity, deodorant performance, and self-adhesiveness.

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. .

(Inorganic porous material)
Examples of inorganic porous materials used in deodorants include activated clay and activated bentonite.
Activated clay is a type of clay that is porous, has a large specific surface area, and is excellent in adsorptivity.
The activated clay preferably has a large specific surface area, and there are no particular restrictions on the specific surface area, but those with a specific surface area of 50 to 400 m ² /g are readily available. The pH (5% suspension) is preferably 2.5-9, more preferably 3-7.
Activated bentonite is obtained by adding several wt % of sodium carbonate to Ca-type bentonite to artificially convert it to Na-type, and exhibits characteristics similar 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. It is roughly divided into two types of type bentonite.

(Metal-supporting inorganic material)
The metal-supporting inorganic substance is an inorganic substance having a deodorizing effect, and contains a compound in which phosphorus element, copper, silicon, or other metal salts are supported on an inorganic substance. A very small amount of the contained metal element or the like is ionized to exhibit a deodorizing effect.
In the metal-supported inorganic material, the metal component or the like in the metal-supported inorganic material is ionized to exhibit a catalytic action that promotes the decomposition reaction of the odorant.

(Inorganic odor decomposing agent)
Examples of inorganic odor decomposing agents include those obtained by mixing a salt composed of a metal cation and an inorganic acid anion with a metal oxide. Specifically, alum (AlK(SO ₄ ) ₂ ) is mixed with CaO and ZnO. things, etc.
The inorganic odor decomposing agent ionizes the metal components and the like in the inorganic odor decomposing agent , and exerts a catalytic action to accelerate the decomposition reaction of sulfur-based malodorous substances.

(self-adhesive)
The self-adhesiveness of the deodorant film is preferably exhibited at 10 to 50° C. because the deodorant film is used in the living temperature range.
The self-adhesiveness of the deodorizing film is preferably such that the adhesive strength when peeled off in the shearing direction is 1.5 N/15 mm or more. If the adhesive strength is greater than the above, it is possible to sufficiently seal and contain the waste.
There is no particular upper limit to the preferred adhesive strength, but when the adhesive is once unsealed for additional storage of waste, etc., it is preferably 15 N/15 mm or less, and when peeled in the vertical direction, it can be easily peeled off by hand. preferable. The self-adhesiveness of the deodorant film differs from the self-adhesiveness in that it can be easily repeatedly sealed and unsealed.
As a method for measuring and evaluating the adhesiveness, for example, first, the adhesive surfaces of the deodorant films are placed facing each other, and a pressure of 0.18 MP is applied at 40° C. for 12 hours. Then, it is peeled off at a rate of 300 mm/min in the shear direction to measure the adhesive strength, and in the vertical direction, it is peeled off by hand to evaluate the easiness of peeling by sensory evaluation.

[Adhesive layer]
The adhesive layer is a layer that does not particularly need to be provided when the deodorant film does not require self-adhesiveness or other layers such as a layer containing a deodorant have sufficient self-adhesiveness. When the deodorant film has self-adhesiveness, the deodorant film may contain an adhesive resin in the layer containing the deodorant. When sufficient self-adhesiveness cannot be exhibited due to a high concentration of the odorant, it is possible to have an adhesive layer containing an adhesive resin but not containing a deodorant. By not containing a powdery deodorant, excellent self-adhesiveness can be exhibited.
The adhesive layer is preferably provided on at least one surface layer of the deodorizing film.

Moreover, the adhesive layer can also use a general-purpose thermoplastic resin together in order to adjust self-adhesiveness.
Although the thickness of the adhesive layer is not particularly limited, it is preferably 1 μm or more and 30 μm or less. If the thickness is less than the above range, the self-adhesiveness is not easily exhibited, and if the thickness is greater than the above range, the self-adhesiveness is not so improved, and the adhesive layer is easily deformed, making it difficult to maintain a homogeneous layer structure.
The adhesive layer may be composed of one layer or composed of two or more layers having the same or different compositions.

[Adhesive resin]
As the adhesive resin, polyolefin resin, EVA, NBR rubber, SBR rubber, etc. having adhesive grades are preferable, polyolefin resin having adhesive grade is more preferable, and LLDPE having adhesive grade (hereinafter referred to as adhesive LLDPE) is more preferred.
According to JIS K6899-1:2000, LLDPE has a density of 0.910 g/cm ³ or more and 0.925 g/cm ³ or less. Among low-density polyethylene), it refers to LLDPE having particularly good adhesiveness, and refers to LLDPE having a density of 0.88 g/cm ³ or more and 0.915 g/cm ³ or less.
If the density is lower than the above range, the adhesiveness is too strong or the softening point is too low, making it difficult to maintain the layer structure. If the density is higher than the above range, it tends to be difficult to exhibit sufficient adhesiveness.

[Adhesion layer]
The adhesive used in the adhesive layer is not particularly limited, and dry lamination adhesives, EC (extrusion coat) adhesives, non-solvent lamination adhesives, arbitrary anchor coating agents, and the like can be used.
Further, the adhesive may be of any type such as thermosetting type, ultraviolet curable type, electron beam curable type, etc., and may be in any form such as aqueous type, solution type, emulsion type, dispersion type, etc., and its properties may be , film/sheet, powder, solid, etc. Further, the adhesive mechanism may be any form of chemical reaction type, solvent volatilization type, heat melting type, heat pressure type, or the like.
Components for forming such an adhesive layer include polyvinyl acetate-based adhesives such as polyvinyl acetate and vinyl acetate-ethylene copolymers, and copolymers of polyacrylic acid and polystyrene, polyester, polyvinyl acetate, and the like. Polyacrylic acid-based adhesives, cyanoacrylate-based adhesives, ethylene copolymer-based adhesives composed of copolymers of ethylene and monomers such as vinyl acetate, ethyl acrylate, acrylic acid, and methacrylic acid, cellulose-based adhesives, Polyurethane-based adhesives, polyester-based adhesives, polyamide-based adhesives, polyimide-based adhesives, polyolefin-based adhesives such as LDPE, amino resin-based adhesives made of urea resin or melamine resin, phenolic resin-based adhesives, epoxy-based adhesives Adhesives, reactive (meth)acrylic adhesives, elastomer adhesives such as chloroprene rubber, nitrile rubber, styrene-butadiene rubber, silicone adhesives, alkali metal silicates, inorganic adhesives such as low-melting glass etc.

<Deodorizing packaging material>
The deodorizing packaging material is a packaging material produced using the deodorizing film of the present invention, has deodorizing properties, and can also have self-adhesive properties as necessary.
The deodorant packaging material can have a layer made of a deodorant film and various functional layers as required.

<Deodorizing packaging materials>
The deodorizing packaging material is a packaging material produced using the deodorizing packaging material of the present invention, and has deodorant properties and, if necessary, self-adhesive properties.
A specific example of the deodorant packaging material is a roll of the deodorant packaging material.

<Deodorizing package>
The deodorant package is a package produced using the deodorant packaging material of the present invention, and has deodorant properties and, if necessary, self-adhesive properties.

<Deodorant packaging bag>
The deodorant packaging bag is a packaging bag produced using the deodorant packaging material of the present invention, and is one embodiment of a bag-like package, and has deodorant properties and, if necessary, self-adhesiveness. can also have

<Raw materials>
Main raw materials used in the examples of the present invention are as follows.
[resin]
- Adhesive LLDPE1: LLDPE manufactured by Prime Polymer Co., Ltd., Evolue SP0510. Density 0.903 g/cm ³ .
- Adhesive LLDPE2: LLDPE manufactured by Prime Polymer Co., Ltd., Evolue SP1022. Density 0.909 g/cm ³ .
General-purpose LLDPE1: LLDPE manufactured by Prime Polymer Co., Ltd., Evolue SP2020. Density 0.916 g/cm ³ .
General-purpose LDPE1: LDPE manufactured by Japan Polyethylene Co., Ltd., Novatec LC600A. Density 0.918 g/cm ³ .

[Deodorants]
- Inorganic porous material 1: Activated clay, galleon earth manufactured by Mizusawa Chemical Industry Co., Ltd. Number average particle size 5 μm.
- Inorganic porous material 2: Activated Bennite, Benclay manufactured by Mizusawa Chemical Industry Co., Ltd. Number average particle size 4.5 μm.
- Metal-supporting inorganic material 1: Copper phosphate kneaded glass manufactured by Ishizuka Glass Co., Ltd. Number average particle size 5 μm.
· Inorganic odor decomposition agent 1: Deodorant-containing resin composition manufactured by Dainichiseika Kogyo Co., Ltd., Daimeshu. Deodorant content 30% by mass. The deodorant component is CaO/ZnO-supported AlK(SO ₄ ) ₂ . Maximum particle size 7-20 μm, number average particle size 5-15 μm.

[others]
- AB agent 1: Sumitomo Chemical Co., Ltd. anti-blocking agent, EMB-21.

<Preparation of masterbatch>
[Preparation of Masterbatch 1]
General-purpose LDPE 1 and deodorant inorganic porous material 1 were melt-blended at the following ratio to obtain masterbatch 1 (MB1).
General-purpose LDPE1 70 parts by mass Inorganic porous material 1 30 parts by mass [Preparation of masterbatch 2-3]
According to the formulations in Table 1, melt blending was performed in the same manner as masterbatch 1 to obtain masterbatches 2 to 3 (MB2 to 3).

<Adjustment of resin composition for adhesive layer>
[Adjustment of resin composition A]
The following raw materials were mixed to obtain a resin composition A for an adhesive layer.
Adhesive LLDPE1 95 parts by mass AB agent 1 5 parts by mass

[Adjustment of resin composition B]
The following raw materials were mixed to obtain a resin composition B for an adhesive layer.
Adhesive LLDPE2 95 parts by mass AB agent 1 5 parts by mass

[Adjustment of resin composition C]
The following raw materials were mixed to obtain a resin composition C for an adhesive layer.
General-purpose LLDPE1 95 parts by mass AB agent 1 5 parts by mass

[Example 1]
The following raw materials were mixed to obtain a resin composition for a deodorant layer.
MB1 33 parts by mass General-purpose LLDPE1 67 parts by mass Then, the general-purpose LLDPE1 for the support layer and the resin composition for the deodorant layer prepared above are formed into a film and laminated by an inflation method to obtain a deodorant having the following layer structure. got the film.
Support layer (5 μm) / deodorant layer (20 μm)

[Example 2]
The following raw materials were mixed to obtain a resin composition for a deodorizing layer.
MB1 33 parts by mass Adhesive LLDPE1 67 parts by mass Then, the general-purpose LLDPE1 for the support layer, the resin composition for the deodorizing layer prepared above, and the resin composition A for the adhesive layer prepared above were subjected to inflation. A self-adhesive deodorant film having the following layer structure was obtained by forming and laminating the film according to the method.
Support layer (5 μm) / deodorant layer (20 μm) / adhesive layer (5 μm)

[Examples 3 to 5]
A deodorant film was obtained in the same manner as in Example 2 except that the composition of the deodorant layer was changed according to Table 2, and evaluated in the same manner.

[Example 6]
The following raw materials were mixed to obtain a resin composition for a deodorant layer.
MB1 33 parts by mass Adhesive LLDPE2 67 parts by mass Then, in the same manner as in Example 2, except that the resin composition for the deodorant layer was replaced with the above resin composition, and the resin composition B was used for the adhesive layer. A deodorant film was obtained from the operation and evaluated in the same manner.

[Example 7]
The following raw materials were mixed to obtain a resin composition for a deodorant layer.
MB1 33 parts by mass Adhesive LLDPE1 67 parts by mass Then, the resin composition for the deodorant layer prepared above and the resin composition A for the adhesive layer prepared above were film-formed and laminated by an inflation method. A deodorant film having the following layer structure was obtained and evaluated in the same manner.
Deodorant layer (20 μm) / adhesive layer (5 μm)

[Example 8]
The following raw materials were mixed to obtain a resin composition for a deodorizing layer.
MB1 33 parts by mass Adhesive LLDPE1 67 parts by mass Then, the resin composition for the deodorant layer prepared above was used to form a film by an inflation method to obtain a deodorant film consisting only of a deodorant layer (20 μm). and evaluated in the same way.

[Comparative Example 1]
A film having the following layer structure was obtained in the same manner as in Example 2, except that an adhesive layer made of adhesive LLDPE1 was formed instead of the deodorant layer, and evaluated in the same manner.
Support layer (5 μm)/adhesive layer (20 μm)/adhesive layer (5 μm)

[Comparative Example 2]
The general-purpose LLDPE1 for the support layer and the resin composition C for the adhesive layer prepared above were formed and laminated by an inflation method to obtain a film having the following layer structure.
Support layer (25 μm) / adhesive layer (5 μm)

<Summary of results>
The deodorant films or deodorant packaging bags of all the examples of the present invention exhibited good film-forming properties, bag-making properties (heat-sealing properties), and deodorizing properties. In addition, Example 4 exhibited good deodorant properties only for ammonia gas.
Additionally, Examples 2-8, which contain a tackifying resin, exhibited excellent self-tacking properties.
However, Comparative Examples 1 and 2 containing no deodorant exhibited poor deodorizing properties.

<Evaluation>
[Film formability]
The appearance of the film was observed with the naked eye, and the presence or absence of defects was evaluated according to the following evaluation criteria.
◯: There were no wrinkles, bumps, or peeling on the film.
x: The film had wrinkles, bumps, and peeling.

[Self-adhesiveness]
(Shear direction adhesive force)
Two films of 100 mm (direction of machine movement/hereafter MD direction)×50 mm were cut from the film and superimposed with the same surfaces facing each other, and the upper and lower films were shifted 50 mm in the MD direction.
Next, the 50 mm length × 50 mm width portion of each of the upper and lower films that are not overlapped is used as a non-crimped portion, and the overlapping 50 mm length × 50 mm width portion is used as a crimped portion, and a pressure of 0.18 MP is applied with a blocking hand tester. After being left to stand at 40° C. for 12 hours while being pressure-bonded under pressure, it was cut to a width of 15 mm to prepare a test piece.
Then, the non-crimped portion was sandwiched one by one on the upper and lower sides in a tensile tester and pulled in the MD direction at a speed of 300 mm/min to measure the shear peel strength.
Adhesion of 1.5 N/15 mm or more was regarded as acceptable.
(vertical peelability)
Using a test piece prepared for measuring shear direction adhesion, one side of the stacked films is fixed by sticking it on a platform, and the edge of the non-bonded portion of the top film is lifted vertically. The easiness of peeling was sensory-evaluated according to the following evaluation criteria.
◯: Easy to peel off.
x: Could not be peeled off easily.

[Bag-making properties (heat-sealing properties)]
Two films of 40 cm×20 cm were stacked so that the deodorant adhesive layers faced each other, and heat-sealed on four sides to prepare a pouch bag, which was evaluated according to the following pass/fail criteria.
Heat sealing conditions Temperature: 180°C
Pressure: 1 kgf/ ^cm2
Time: 1 second Pass/fail judgment ◯: The bag was made without any problems.
x: The bag could not be made.

[Deodorant]
Using the produced film, two small pouches for inner bags consisting of four-sided pouches with a size of 120 mm × 160 mm were produced, and 300 cc of hydrogen sulfide gas (24 ppm ), and 300 cc of ammonia gas (75 ppm) was filled inside another small pouch for the inner bag.
Next, prepare two large pouches for outer bags made of four-way pouches (using PA bags manufactured by GL Sciences Co., Ltd.) with a size of 190 × 150 mm, and the above-mentioned sulfurization is inside one large pouch bag. A small inner pouch bag filled with hydrogen gas was enclosed, and a small inner pouch bag filled with ammonia gas was enclosed inside another large pouch bag.
Then, each of the two bags was filled with air so that the space between the outer bag and the inner bag was 100 cc. was sampled to measure the concentration of hydrogen sulfide gas or ammonia gas.

1 deodorant film 2 deodorant layer 3 adhesive layer 4 support layer

Claims (8)

A deodorant film for containing waste,
The deodorant film contains at least a deodorant and an adhesive resin ,
The deodorant adsorbs odorous substances and/or promotes the decomposition reaction of odorous substances, and includes activated clay, activated bentonite, copper phosphate mixed glass, and CaO of AlK(SO 4 ₎ 2 _. / ZnO-supported material containing one or more selected from the group consisting of, the deodorant is dispersed in the adhesive resin,
At least one surface layer of the deodorant film has self-adhesiveness,
The adhesive resin is an adhesive linear low-density polyethylene having a density of 0.88 g/cm ³ or more and 0.915 g/cm ³ or less,
The self-adhesive surface layers of the deodorant film were placed face to face, and after applying a pressure of 0.18 MPa at 40° C. for 12 hours, they could be peeled off in the vertical direction and in the shear direction at a speed of 300 mm/min. The adhesive strength when peeled off is 1.5N/15mm or more
A deodorizing film characterized by: The deodorant film has a deodorant layer and an adhesive layer,
The deodorant layer is a layer containing the deodorant,
The adhesive layer does not contain the deodorant but contains the adhesive resin and is a surface layer on at least one side of the deodorant film,
The deodorant film according to claim 1 . The deodorant has a maximum particle size of 20 μm or less and a number average particle size of 0.1 μm or more and 15 μm or less,
The deodorant film according to claim 1 or 2 . 4. The method according to any one of claims 1 to 3 , wherein the content of the deodorant in the layer containing the deodorant is 0.1% by mass or more and 30% by mass or less. Deodorant film described. A deodorant packaging material characterized by being produced using the deodorant film according to any one of claims 1 to 4 . A deodorizing packaging material produced using the deodorizing packaging material according to claim 5 . A deodorant package, characterized by being produced using the deodorant package material according to claim 5 . A deodorant packaging bag produced using the deodorant packaging material according to claim 5 .

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