JP2019177578A - Odor adsorptive laminate and odor adsorptive packaging material - Google Patents

Abstract

To provide an odor adsorptive laminate excellent in manufacturing suitability and exhibiting high adsorptive effect on odor generated during disinfection and sterilization treatments such as UV irradiation, hot pack, boil, γ ray irradiation, or EB irradiation of a leachable organic article originally contained by a laminate to adsorb the odor, and exhibiting high adsorptive effect for a long term, a film for packaging material, a packaging material, a packaging material for BIB, and a liquid content packaging material for BIB.SOLUTION: There is provided an odor adsorptive laminate 1 containing a substrate layer 2, an adhesive layer 3, and a sealant layer 4, in which the adhesive layer and/or the sealant layer contain an odor adsorptive body, content of the odor adsorptive body in the adhesive layer is 0.3 mass% or more and 50 mass% or less when the adhesive layer contains the odor adsorptive body, content of the odor adsorptive body in the sealant layer is 0.3 mass% or more and 15 mass% or less when the sealant layer contains the odor adsorptive body, and the odor adsorptive body contains hydrophobic zeolite with SiO/AlOmole ratio of 30/1 or more and 8000/1 or less.SELECTED DRAWING: Figure 1

Description

  In the present invention, the elution organic substance originally contained in the packaging material and the odor component generated from the packaging material during the sterilization / sterilization process are transferred to the liquid content in the package and changed into the content. Odor-adsorbing laminates excellent in odor-resistance change, and odor-adsorbing packaging materials for packaging materials, odor-adsorbing packaging materials produced from the odor-adsorbing laminates, The present invention relates to an odor adsorbing packaging material for BIB and an odor adsorbing liquid content packaging material for BIB.

As a packaging material, a packaging material containing an odor adsorbent that adsorbs an odor has been proposed (Patent Document 1). In such a packaging material, an odor adsorbent such as synthetic zeolite or activated carbon is kneaded into the resin material.
However, since such a packaging material has a problem of adsorbing not only odor but also moisture in the atmosphere and desorbing the odor once adsorbed, a sufficient odor adsorption effect can be obtained. Not.

  Although a packaging material containing an odor adsorbent obtained by supporting a chemical adsorbent on an inorganic porous material is also known (Patent Document 2), the main adsorption object adsorbs an odor component having a specific functional group. However, in the situation where no resin material is selected, the generation amount of organic substances having no functional group cannot be suppressed, and the odor component cannot be sufficiently adsorbed.

  Furthermore, the BIB liquid contents packing bag filled with liquid contents is easy to cause pinholes in the package due to rubbing during transportation, etc., and is durable to prevent the occurrence of pinholes. A packaging material including a base film or a thick base film has been used, but the packaging material tends to be hard and cost increases, and it has been difficult to balance usability.

Japanese Patent No. 2538487 JP 2014-233408 A

  The present invention solves the above-mentioned problems, is excellent in manufacturing suitability, and has an elution organic substance originally contained in the laminate, and sterilization and sterilization such as UV irradiation, hot pack, boiling, γ-ray irradiation, and EB irradiation. Deodorize by exerting a high adsorbing effect on odors generated by decomposition of the resin that constitutes the laminate during processing, and perform odor adsorption efficiently, making it difficult to desorb odors once adsorbed Odor adsorption capacity is not reduced because it is possible, exhibiting a high adsorption effect over a long period of time, and an odor adsorption laminate excellent in odor resistance change to liquid contents, and produced from the odor adsorption laminate It is an object of the present invention to provide an odor adsorbing film for packaging material, an odor adsorbing packaging material, an odor adsorbing packaging material for BIB, and an odor adsorbing liquid content packaging material for BIB.

As a result of various studies, the inventors of the present invention include at least a base material layer, an adhesive layer, and a sealant layer, and the adhesive layer and / or the sealant layer contains an odor adsorbent, and the odor adsorbent is made of SiO _2. It was found that an odor adsorbing laminate including a hydrophobic zeolite having a / Al ₂ O ₃ molar ratio of 30/1 or more and 8000/1 or less achieves the above-mentioned object.

The present invention is characterized by the following points.
1. It is an odor adsorbing laminate including at least a base material layer, an adhesive layer, and a sealant layer,
The adhesive layer and / or the sealant layer contains an odor adsorbent,
When the adhesive layer contains the odor adsorbent, the content of the odor adsorbent in the adhesive layer is 0.3 mass% or more and 50 mass% or less,
When the sealant layer contains the odor adsorbent, the content of the odor adsorbent in the sealant layer is 0.3 mass% or more and 15 mass% or less,
The odor adsorbent is an odor adsorbing laminate including a hydrophobic zeolite having a SiO ₂ / Al ₂ O ₃ molar ratio of 30/1 or more and 8000/1 or less.
2. 2. The odor adsorbing laminate according to 1, wherein the adhesive layer is a dry laminate adhesive layer or a non-solvent laminate adhesive layer.
3. The adhesive layer is an extrusion coat adhesive layer or a sand laminate adhesive layer;
The content of the odor adsorbent in the adhesive layer is 0.3% by mass or more and 15% by mass or less.
2. The odor adsorbing laminate according to 1 above.
4). The odor adsorbing laminate according to any one of the above 1 to 3, wherein the odor adsorbing material further includes a chemical adsorbent-supporting inorganic porous material.
5. The odor adsorbent is melt-kneaded in advance at a mass ratio of the thermoplastic resin A and the odor adsorbent / thermoplastic resin of 0.5 / 99.5 or more and 40/60 or less, The odor adsorption laminated body in any one of 1-4.
6). The odor according to any one of 1 to 5 above, wherein the adhesive layer further contains one or more selected from the group consisting of a polyurethane resin, a polyester resin, a polyamide resin, and a polyolefin resin. Adsorbed laminate.
7). The odor adsorbing laminate according to any one of 1 to 6 above, wherein the sealant layer further contains the thermoplastic resin C having a melt flow rate of 0.2 g / 10 min or more and 10.0 g / 10 min or less. body.
8). The adhesive layer includes an odor adsorbing adhesive layer containing an odor adsorbent, and a non-odor adhering adhesive layer not containing an odor adsorbent,
The non-odor adhering adhesive layer is in contact with one or both sides of the odor adsorbing adhesive layer,
The odor adsorption laminated body in any one of said 1-7.
9. The sealant layer includes an odor adsorbing sealant layer containing an odor adsorbent, and a non-odor adsorbing sealant layer not containing an odor adsorbent,
The said odor adsorption sealant layer is an odor adsorption laminated body in any one of said 1-8 which is in contact with the single side | surface or both surfaces of the said odor adsorption sealant layer.
10. The content of the hydrophobic zeolite in the adhesive layer is 0.3 mass% or more and 13 mass% or less,
The odor adsorbing laminate according to any one of 4 to 9 above, wherein the content of the chemical adsorbent-supporting inorganic porous material in the adhesive layer is 0.3% by mass or more and 10% by mass or less.
11. The content of the hydrophobic zeolite in the sealant layer is 0.1% by mass or more and 13% by mass or less,
The content of the chemical adsorbent-carrying inorganic porous material in the sealant layer is 0.1% by mass or more and 10% by mass or less.
The odor adsorption laminated body in any one of said 4-10.
12 4-11 above, wherein the chemical adsorbent of the chemical adsorbent-supporting inorganic porous body has a functional group reactive with one or more selected from the group consisting of aldehydes, ketones, and carboxylic acids. The odor adsorption laminated body in any one.
13. 13. The odor adsorbing laminate according to 12, wherein the chemical adsorbent has an amino group.
14 The odor adsorption film for packaging materials which consists of an odor adsorption laminated body in any one of said 1-13.
15. 15. An odor adsorbing packaging material comprising the odor adsorbing film for packaging material according to 14 above.
16. At least an odor adsorbing packaging material consisting of an outer layer film and an inner layer film,
The outer layer film and / or the inner layer film is composed of the odor adsorbing film for packaging material described in 14 above,
The odor adsorbing packaging material, wherein the outer layer film and the inner layer film are only partially bonded to each other.
17. The odor adsorbing packaging material for BIB, produced from the odor adsorbing packaging material described in 16 above.
18. The odor adsorbing liquid content packaging material for BIB, produced from the odor adsorbing packaging material described in 16 above.

Since the odor adsorbing laminate of the present invention has an odor adsorbing layer having a specific configuration, the odor is reduced, and sterilization / sterilization treatment of UV irradiation, γ-ray irradiation, EB irradiation, hot pack, boil, etc. In this case, it has an effect of efficiently adsorbing odors generated by decomposition of the resin constituting the laminated body over a long period of time.
By these effects, when a package is produced using the odor adsorbing laminate of the present invention, the amount of organic matter transferred into the filled contents can be reduced and the change in odor can be suppressed.
Therefore, the odor adsorbing laminate of the present invention is suitable as a packaging bag for foods, pharmaceuticals, and medical products that are subjected to sterilization and sterilization. It is particularly suitable when the content is a liquid.

It is a schematic sectional drawing which shows the example about the layer structure of the odor adsorption laminated body of this invention. It is a schematic sectional drawing which shows an example of another aspect about the layer structure of the odor adsorption laminated body of this invention. It is a schematic sectional drawing which shows an example of another aspect about the layer structure of the odor adsorption laminated body of this invention. It is a figure which shows the adsorption mechanism with respect to the odorous substance of a chemical adsorbent carrying | support inorganic porous body.

  The odor adsorbing laminate of the present invention and the packaging material produced using the odor adsorbing laminate will be described in more detail below. This will be described with reference to specific examples, but the present invention is not limited to this.

<Layer structure of odor adsorbing laminate>
The odor adsorbing laminate of the present invention includes at least a base material layer, an adhesive layer, and a sealant layer, and the adhesive layer and / or the sealant layer contains an odor adsorbent.

<Odor adsorbent>
In the present invention, the odor adsorbent contains a specific hydrophobic zeolite, and can further contain a chemical adsorbent-supporting inorganic porous material.
The odor adsorbent can be directly mixed and kneaded with the resin constituting each layer, mixed with the thermoplastic resin A at a high concentration, and then melt-kneaded to prepare a master batch, which has a target content rate. It is also possible to use a so-called master batch method in which the resin constituting each layer is mixed, melted and kneaded at a ratio corresponding to the above.

[Making master batch of odor adsorbent]
Even if the odor adsorbent that easily aggregates and the resin constituting each layer are combined by masterbatch, the odor adsorbent can be uniformly dispersed in the resin.
As a method for kneading the odor adsorbent and the thermoplastic resin A, a known or conventional kneading method can be applied.
At this time, the thermoplastic resin A in the masterbatch may or may not be the same as the resin in each layer. It is possible to combine the same resin and other resin types according to the purpose.
For example, if the thermoplastic resin A is the same as the resin constituting each layer, it is homogeneous and good when it is mixed or melt-kneaded with the thermoplastic resin A for each layer again. In addition, heat sealability and the like can be maintained, and excellent odor adsorbability can be obtained.

The content of the odor adsorbent in the master batch is preferably 0.5% by mass or more and 40% by mass or less, and more preferably 1% by mass or more and 20% by mass or less.
The content of the hydrophobic zeolite in the master batch is preferably 0.5% by mass or more and 40% by mass or less, and more preferably 1% by mass or more and 20% by mass or less.
The content of the chemical adsorbent-supporting inorganic porous material in the master batch is preferably 0.5% by mass or more and 40% by mass or less, and more preferably 1% by mass or more and 20% by mass or less.

[Thermoplastic resin A]
In the master batch of the odor adsorbent, the thermoplastic resin A that disperses the odor adsorbent can disperse the odor adsorbent in the master batch, and has good affinity with the resin of each layer blending the master batch, and is easy. As long as they can be kneaded and homogenized, there is no particular limitation, and it is possible to combine the same resin and other resin types according to the purpose.

[Hydrophobic zeolite]
Zeolites is generally higher SiO ₂ / Al ₂ O ₃ molar ratio, hydrophobicity increases, the hydrophobic zeolite is contained in the odor adsorbing layer in the present invention, SiO ₂ / Al ₂ O ₃ molar ratio of 30/1 to 8000/1 is preferable.
Hydrophobic zeolite does not lose its odor adsorbing ability even when the package or the packaging material is exposed to 230 ° C. or higher, and can exert a deodorizing effect due to adsorption of odor components.
Hydrophobic zeolite may be any external shape such as spherical, rod-like, elliptical, etc., and may be in any form such as powder, lump, granular, etc., uniform dispersion to the resin and kneading characteristics, From the viewpoint of subsequent film-forming properties, etc., powder form is preferred.

In the present invention, the average particle size of the hydrophobic zeolite can be appropriately selected from those having an average particle size depending on the application, but those having an average particle size of 0.01 μm to 10 μm are preferable. Here, the average particle diameter is a value measured by a dynamic light scattering method.
When the average particle size is smaller than 0.01 μm, the aggregation of the hydrophobic zeolite tends to occur and the dispersibility in the resin tends to be lowered. In addition, when the average particle size is larger than 10 μm, the film-forming property tends to be inferior, so that it is difficult to add a large amount of hydrophobic zeolite, and the surface area is further reduced, so that a sufficient deodorizing effect is obtained. The possibility of not being obtained arises.

  Hydrophobic zeolite is hydrophobic, so it is difficult to adsorb highly polar water molecules etc. Conversely, it has low affinity for odor molecules, hydrophobic gas, lipophilic gas (including solvent-based gas). These are high and are easy to adsorb these. Furthermore, due to the effects of alkali metals such as Ca, Na, K, and alkaline earth metals present on the zeolite surface, the zeolite surface exhibits basicity, and acid gases are easily adsorbed by a neutralization reaction.

[Chemical adsorbent-supported inorganic porous material]
In the present invention, the chemical adsorbent-supporting inorganic porous material is a material in which a chemical adsorbent is supported on an inorganic porous material, such as an elution organic substance, UV irradiation, γ-ray irradiation, EB irradiation, hot pack, boil It has a function of adsorbing odorous substances generated from the package during sterilization and sterilization treatment.
As the loading method, a known or conventional loading method can be applied. For example, the inorganic porous material is impregnated with a solution containing a chemical adsorbent described below and dried. it can.

In the present invention, by containing the odor adsorbent in which the chemical adsorbent is supported on the inorganic porous body in the odor adsorbing layer, the adsorbing capacity per unit mass of the chemical adsorbent can be greatly increased, The content of the chemical adsorbent-supporting inorganic porous material can be reduced. In addition, physical adsorption characteristics for the pores of the inorganic porous material can be expected.
And by reducing content, it can hold | maintain the outstanding film forming property, adhesiveness, seal strength, etc. of the contained resin composition.

In addition, the chemical adsorbent-supporting inorganic porous material may have an arbitrary outer shape such as a spherical shape, a rod shape, an elliptical shape, and may have any shape such as a powder shape, a lump shape, and a granular shape. From the viewpoint of film properties, uniform dispersion in a thermoplastic resin, kneading characteristics, and the like, a powder form is preferable.
As the chemical adsorbent-supporting inorganic porous material, those having an arbitrary average particle size can be appropriately selected according to the use, but in the present invention, those having an average particle size of 0.01 μm to 10 μm are particularly preferable. More preferably, the thickness is 1 μm to 8 μm, and more preferably 1 μm to 7 μm. Here, the average particle diameter is a value measured by a dynamic light scattering method.
When the average particle size is smaller than 0.01 μm, the chemical adsorbent-carrying inorganic porous body tends to aggregate and the dispersibility of the chemical adsorbent-carrying inorganic porous body in the resin tends to be lowered.
Further, when the average particle diameter is larger than 10 μm, the film forming property of the resin composition to be contained tends to be inferior, so that it tends to hardly contain the chemical adsorbent-supporting inorganic porous material, and the sufficient adsorption effect May not be obtained.

(Inorganic porous material)
In the present invention, as the inorganic porous material, any inorganic compound having a large number of pores on its surface can be used. For example, inorganic phosphoric acid such as zeolite, silicon dioxide, silicate, activated carbon, titania, calcium phosphate, etc. Examples include salts, alumina, aluminum hydroxide, magnesium hydroxide, and mixtures thereof.
In particular, it is preferable to apply aluminum hydroxide, zeolite, or silicate from the viewpoint of having a porous state having an effective pore size with respect to the molecular size or cluster size of the substance to be adsorbed and from the viewpoint of safety.

  In addition, these may be any external shape such as a spherical shape, a rod shape, an elliptical shape, or any shape such as a powder shape, a lump shape, and a granular shape. After the inorganic porous material is formed, a powder form is preferable from the viewpoint of uniform dispersion in the resin, kneading characteristics, film forming property of the resin composition to be contained, and the like.

  The inorganic porous material can be appropriately selected from those having any average particle size depending on the application, but in the present invention, in particular, in order to obtain the chemical adsorbent-carrying inorganic porous material having the above average particle size, Those having an average particle diameter of 0.01 μm to 10 μm are preferable, those having an average particle diameter of 0.1 μm to 8 μm are more preferable, and those having an average particle diameter of 1 μm to 7 μm are still more preferable.

(Chemical adsorbent)
In the present invention, the chemical adsorbent has a reactive functional group that causes a chemical reaction with and binds to an eluting organic substance or an odorous substance generated by decomposition of a resin during sterilization / sterilization treatment, and It is a compound that can be supported on an inorganic porous material.
More specifically, UV irradiation, γ-ray irradiation, EB irradiation, sterilization of hot packs, boil, etc.
It is a compound having a reactive functional group that binds to various aldehydes, ketones, carboxylic acids and the like produced during sterilization.

  Examples of such compounds include compounds having basic functional groups such as amino groups and hydroxyl groups, metal carbonates, metal hydrogen carbonates, amide group-containing compounds, and the like. However, it is not limited to these.

Examples of the compound containing an amino group include alkylamine, ethylenediamine, tetramethylenediamine, diethylenetriamine, triethylenetriamine, tetraethylenepentamine, piperazine, metaphenylenediamine, and polyamine.
Examples of the compound having a hydroxyl group include metal hydroxides such as sodium hydroxide, potassium hydroxide, magnesium hydroxide, and iron hydroxide.
Examples of the metal carbonate include sodium carbonate and calcium carbonate.
Examples of the hydrogen carbonate include sodium hydrogen carbonate.
Examples of the amide group-containing compound include 2-acrylamido-2-methylpropanesulfonic acid.

  In the present invention, a compound having an amino group is preferable as the chemical adsorbent exhibiting a particularly excellent adsorption effect.

  The adsorption mechanism of the chemical adsorbent for the substances to be adsorbed such as the eluted organic substances and odorous substances will be described in more detail with reference to the specific examples of FIGS. 4A to 4B, but the present invention is not limited to these.

  For example, when the adsorption target substance (odor substance) is an acid odor substance, as shown in FIG. 4 (a), as the chemical adsorbent, for example, a compound having a hydroxyl group is selected on the inorganic porous body. It can be used as a chemically adsorbent-supported inorganic porous material. Thereby, a carboxyl group and a hydroxyl group cause a chemical reaction and combine to adsorb the substance to be adsorbed.

  When the adsorption target substance is an aldehyde, as shown in FIG. 4 (b), for example, a compound having an amino group is selected as the chemical adsorbent and supported on the inorganic porous body, and the chemical adsorbent is selected. It can be used as a supported inorganic porous material. Thereby, an aldehyde group and an amino group cause a chemical reaction and combine to adsorb the substance to be adsorbed.

At this time, by the chemical adsorption, the adsorption target substance (odor substance) once adsorbed is not desorbed, and the odor adsorption can be performed efficiently.
Furthermore, unlike the physical adsorbent in which the adsorption target substance (odor substance) and water vapor are adsorbed at the same adsorption site, the chemical adsorbent in the present invention binds the adsorption target substance to a specific functional group of the chemical adsorbent. Therefore, it is difficult to be affected by various substances that reduce the odor adsorption ability, such as water vapor.

<Base material layer>
For the base material layer contained in the odor adsorbing laminate of the present invention, a film or sheet such as a resin film or sheet generally used for packaging materials for packaging, synthetic paper, or a paper base material can be used. It is preferable to have excellent mechanical strength such as tensile strength, flexural strength, impact strength, and excellent printability.
The base material layer may be a single layer or may be composed of two or more layers. In the case of two or more layers, the layers may be the same composition layer or different composition layers.
Moreover, it is preferable that it is a uniaxially or biaxially stretched resin film or sheet.

  Specific resins include polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene naphthalate; polyamide resins such as nylon 6, nylon 66, and MXD6 (polymetaxylylene adipamide); Cellophane; polyethylene resin, polypropylene resin, polyolefin resin of acid-modified polyolefin resin; polystyrene resin; polyurethane resin; acetal resin; EVOH and the like.

  When using the odor adsorbing laminate of the present invention as a packaging material, it is possible to freely select and use a suitable one according to the use conditions such as the type of contents to be packaged and the presence or absence of heat treatment after filling. Among these, polyester resins and polyamide resins are preferable.

  In particular, a uniaxial or biaxially stretched polyethylene terephthalate film or sheet, a biaxially stretched polypropylene film or sheet, and the like are suitable.

  The resin film or sheet used for the base material layer can be processed, heat-resistant, weather-resistant, mechanical properties, dimensional stability, anti-oxidant, slippery, releasability, flame retardant, anti-fungal as required. Plastic additives such as lubricants, crosslinking agents, antioxidants, UV absorbers, light stabilizers, fillers, reinforcing agents, antistatic agents, pigments, etc., for the purpose of improving and modifying properties, electrical properties, strength, etc. And additives can be added, and the amount added can be arbitrarily added according to the purpose within a range that does not adversely affect other performances.

  Specific paper base materials include, for example, strong sized bleached or unbleached paper base materials, or pure white roll paper, kraft paper, paperboard, coated paper, cast coated paper, processed paper, high-quality paper, etc. Can be used.

In addition, as the paper base material, those having a basis weight of about 80 to 600 g / m ² , preferably those having a basis weight of about 100 to 450 g / m ² can be used.
The resin film or sheet used for the base material layer may have a metal or metal oxide deposited thereon.

In addition, in order to improve adhesion, the base material layer and the film or sheet constituting the base material layer are previously subjected to corona discharge treatment, ozone treatment, low-temperature plasma treatment using oxygen gas or nitrogen gas, etc. before lamination. Alternatively, physical treatment such as glow discharge treatment or chemical treatment such as oxidation treatment using chemicals may be performed.
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 are arbitrarily formed on the surface of the thermoplastic resin layer, and the surface treatment layer It can also be.

  Examples of the various coating agent layers include polyester resins, polyamide resins, polyurethane resins, epoxy resins, phenol resins, (meth) acrylic resins, polyvinyl acetate resins, and polyolefins such as polyethylene and polypropylene. It is possible to use a resin composition whose main component is a vehicle resin or a copolymer or modified resin thereof, a cellulose resin, or the like.

The thickness of the base material layer is preferably 10 μm or more and 50 μm or less, and more preferably 15 μm or more and 40 μm or less.
If it is thinner than the above range, the rigidity of the laminated body is too low, and it tends to be difficult to exhibit high drop bag strength. If it is thicker than the above range, the rigidity of the laminated body becomes too high, and the laminated body is processed. It tends to be difficult, and the content filling property tends to deteriorate.

<Adhesive layer>
The odor adsorbing laminate of the present invention can be laminated by providing an adhesive layer between the base layer, the sealant layer and other layers, and when each layer is a multi-layer. is there.

<Adhesive layer containing odor adsorbent>
The adhesive layer can contain an odor adsorbent.
The adhesive layer can further contain an adhesive suitable for use in combination with the odor adsorbent. Still further, the adhesive layer can consist of an odor adsorbing adhesive layer containing an odor adsorbent and an adhesive, and a non-odor adhering adhesive layer that does not contain an odor adsorbent but has an adhesive. And it is preferable that the non-odor adsorption adhesive layer is in contact with one side or both sides of the odor adsorption adhesive layer.
The content of the odor adsorbent in the adhesive layer is preferably 0.3% by mass or more and 50% by mass or less.

  If the content of the hydrophobic zeolite in the adhesive layer is 0.05% by mass or more in the entire adhesive layer, a sufficient odor adsorbing effect can be exhibited, but it is good as a package. In order to obtain an odor adsorptive effect, the content is more preferably 0.3% by mass or more. On the other hand, the hydrophobic zeolite content is preferably 50% by mass or less in order to obtain good film-forming properties at the time of preparing the laminate and, in addition, to achieve good adhesion.

  If the content of the chemical adsorbent-supporting inorganic porous material in the adhesive layer is 0.05% by mass or more in the entire adhesive layer, a sufficient adsorbing effect can be exhibited, but it is good as a package. In order to obtain a satisfactory adsorption effect, the content is preferably 0.3% by mass or more.

  On the other hand, in order to obtain a good film forming property at the time of preparing the laminate, in addition, in order to achieve good adhesion, the content of the chemical adsorbent-supporting inorganic porous material in the entire adhesive layer is 10% by mass or less. It is preferable that

The adhesive layer may be a layer formed by various methods such as EC (extrusion coat), dry laminate, non-solvent laminate, and sand laminate.
When the adhesive layer is a dry laminate adhesive layer or a non-solvent laminate adhesive layer, the content of the odor adsorbent, the hydrophobic zeolite, and the chemical adsorbent-supporting inorganic porous material is preferably within the above range.

  Further, when the adhesive layer is an EC (extrusion coat) adhesive layer or a sand laminate adhesive layer, the content of the odor adsorbent is 0.3% by mass or more and 15% by mass for the same reason as described above. The following is preferred. And it is preferable that content of hydrophobic zeolite is 0.3 mass% or more and 15 mass% or less, and content of a chemical adsorbent carrying | support inorganic porous body is 0.3 mass% or more and 10 mass% or less. It is preferable that When the hydrophobic zeolite and the chemical adsorbent-supporting inorganic porous material are included, the content of the hydrophobic zeolite is preferably 0.3% by mass or more and 13% by mass or less. The content of is preferably 0.3% by mass or more and 10% by mass or less.

  When the adhesive layer is formed by an extrusion coat or a sand laminate, it is not particularly limited, but first, the resin composition for forming the adhesive layer is heated and melted and expanded and stretched in the necessary width direction with a T die. Then, the molten material is extruded onto a layer to be bonded, and sandwiched between a rubber roll and a cooled metal roll, thereby forming the adhesive layer and bonding and laminating to the layer to be bonded at the same time.

When the adhesive layer is formed by dry lamination, a resin composition dispersed or dissolved in a solvent is applied on one layer and dried, and the other adhesion target layer is stacked and laminated at 30 to 120 ° C. By aging for several hours to several days, the resin composition is cured and laminated.
Examples of the coating method include roll coating, gravure roll coating, and kiss coating, and the coating amount is preferably about 0.1 to 10 g / m ² (dry state). By setting the coating amount of the resin composition within the above range, good adhesiveness can be obtained.
When the adhesive layer is formed by non-solvent laminate, a solvent-free resin composition is applied on one layer, and the other adhesion target layer is laminated and laminated, and then at 30 to 120 ° C. for several hours to several By aging for a day, the resin composition is cured and laminated.

Examples of the coating method include roll coating, gravure roll coating, and kiss coating, and the coating amount is preferably about 0.1 to 15 g / m ² . By setting the coating amount of the resin composition within the above range, good adhesiveness can be obtained.

[Adhesive suitable for use in combination with an odor adsorbent]
Adhesives suitable for use in combination with an odor adsorbent may be a thermosetting type, an ultraviolet curable type, an electron beam curable type, etc., and any form such as an aqueous type, a solution type, an emulsion type, a dispersion type, etc. The properties may be any of film / sheet, powder, solid and the like, and the adhesion mechanism is any of chemical reaction type, solvent volatilization type, heat melting type, hot pressure type, etc. It may be a form.

  Specific examples of the adhesive include, for example, polyvinyl acetate 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 adhesives, cyanoacrylate adhesives, ethylene copolymer adhesives made of copolymers of ethylene and monomers such as vinyl acetate, ethyl acrylate, acrylic acid, methacrylic acid, cellulose adhesives, polyurethane Adhesive, polyester adhesive, polyamide adhesive, polyimide adhesive, polyolefin adhesive such as LDPE, amino resin adhesive made of urea resin or melamine resin, phenol resin adhesive, epoxy adhesive Agent, reactive (meth) acrylic adhesive, chloroprene rubber, nitrile rubber, steel Down - butadiene made of rubber or the like elastomeric adhesive, a silicone adhesive, an alkali metal silicate, made of a low-melting-point glass or the like inorganic adhesive, further, anchor coating agents and the like.

Examples of the anchor coating agent that can be used include organic titanium-based, isocyanate-based, polyethyleneimine-based, acid-modified polyethylene-based, and polybutadiene-based anchor coating agents.
Among these, the adhesive is preferably one or more selected from the group consisting of polyurethane resins, polyester resins, polyamide resins, and polyolefin resins.

<Sealant layer>
The sealant layer is a layer that imparts functions such as heat sealability, flex resistance, and impact resistance to the laminate.
The sealant layer may be a single layer or may be composed of two or more layers. In the case of two or more layers, the layers may be the same composition layer or different composition layers.
The sealant layer of the odor adsorbent of the present invention preferably contains the thermoplastic resin C.

  Furthermore, the sealant layer can include an odor adsorbing sealant layer and a non-odor adsorbing sealant layer, and the non-odor adsorbing sealant layer is preferably in contact with one side or both sides of the odor adsorbing sealant layer.

The content of the odor adsorbent in the entire sealant layer is preferably 0.3% by mass or more and 15% by mass or less.
If the content of the hydrophobic zeolite in the entire sealant layer is 0.05% by mass or more in the entire sealant layer, a sufficient odor adsorbing effect can be exhibited, but it is good as a package. In order to obtain an odor adsorbing effect, the content is preferably 0.1% by mass or more, and more preferably 0.25% by mass or more. On the other hand, in order to obtain a good film forming property at the time of producing the laminate, in addition, in order to achieve a good heat sealability, the content of the hydrophobic zeolite is preferably 13% by mass or less, and 10% by mass. The following is more preferable.

  If the content of the chemical adsorbent-supporting inorganic porous material in the entire sealant layer is 0.05% by mass or more in the total sealant layer, a sufficient adsorption effect can be exhibited. In order to obtain a good adsorption effect, the content is preferably 0.1% by mass or more, and more preferably 0.25% by mass or more.

  On the other hand, in order to obtain a good film forming property at the time of preparing the laminate, in addition to achieve a good heat sealability, the content of the chemical adsorbent-supporting inorganic porous material in the entire sealant layer is 10% by mass. Or less, more preferably 9% by mass or less.

  The thickness of the sealant layer is preferably 5 to 500 μm, more preferably 10 to 250 μm. When it is thinner than the above range, it is difficult to obtain sufficient heat seal strength. When it is thicker than the above range, the cost is increased and the film becomes hard and workability tends to be deteriorated.

[Thermoplastic resin C]
In the present invention, the thermoplastic resin C has heat sealability that can be used for a sealant layer, and preferably has a melt flow rate of 0.2 g / 10 min or more and 10.0 g / 10 min or less. 0.2 g / 10 min or more and 9.5 g / 10 min or less is more preferable. In addition, in this specification, MFR is a value measured from the method based on JISK7210.
When the MFR is less than 0.2 g / min, or 10 g / min or more, it is difficult to be effective in terms of proper processing.

  Specific examples of the thermoplastic resin C include, for example, polyethylene, low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, metallocene polyethylene, polypropylene, ethylene-vinyl acetate copolymer, Ionomer resins, ethylene- (meth) acrylic acid ethyl copolymers, ethylene- (meth) acrylic acid copolymers, ethylene-propylene copolymers, methylpentene polymers, polyolefin resins such as polyethylene or polypropylene, and polyolefins A modified polyolefin resin obtained by modifying a resin with an unsaturated carboxylic acid such as acrylic acid, methacrylic acid, maleic anhydride, fumaric acid or the like, an ethylene- (meth) acrylic acid ester-unsaturated carboxylic acid terpolymer resin, Cyclic polyolefin resin Cyclic olefin copolymer, polyethylene terephthalate (PET), polyacrylonitrile (PAN) but the like, without being restricted thereto.

Among the above, from the viewpoint of heat sealability, it is preferable to include a polyolefin-based resin, particularly preferably low-density polyethylene (LDPE) or linear low-density polyethylene (LLDPE), and particularly including LLDPE. Is preferred.
Further, the thermoplastic resin C can contain a small amount of additives such as an antioxidant and an antiblocking agent, and a known flex resistance improver, an inorganic or organic additive, etc. can be blended as necessary. it can.
Furthermore, it is preferable that the thermoplastic resin C is excellent in resistance to pinholes due to bending when formed into a film as a single body.

  Since the package may cause pinholes due to fatigue failure due to local repeated bending caused by vibration during the packaging process or during transportation, especially packaging materials for food and medical supplies have pinhole resistance. is important.

The pinhole resistance of the thermoplastic resin C in the present invention is such that, for example, the number of pinholes generated after 5000 gelboflexes at 23 ° C. in a 50 μm-thick film made of low-elution polyethylene alone is 0, Or it is preferable that they are 1 or more and 160 or less.
When the number of pinholes generated in the sealant film is within the above range, a packaging material that can withstand practical use can be produced for applications that require pinhole resistance.

[Odor adsorption sealant layer]
The odor adsorbing sealant layer in the present invention is a layer formed from a resin composition containing a thermoplastic resin C and an odor adsorbing body.
In one embodiment of the present invention, the odor adsorbing sealant layer has a single-layer structure formed using a resin composition obtained by kneading an odor adsorbing body and a thermoplastic resin C. Here, the odor adsorbent may be uniformly dispersed in the layer, or may be dispersed with a concentration gradient.

  For example, you may disperse | distribute with the density | concentration gradient of an increasing tendency toward the outer surface from the inner surface at the time of package formation, and heat seal property improves by this structure. On the contrary, it may be dispersed with a decreasing concentration gradient from the inner surface to the outer surface when the package is formed, and this configuration improves the interlayer adhesion strength.

  Further, the odor adsorbing sealant layer may be dispersed from the central portion in the thickness direction toward both surfaces with a decreasing concentration gradient, and this configuration improves heat sealability and interlayer adhesion strength.

  In another aspect, the odor adsorbing sealant layer may have a multilayer structure in which two or more layers are laminated, where each layer includes the type of thermoplastic resin C, the type of odor adsorbent, You may consist of a resin composition from which content differs, respectively.

Furthermore, it is possible to include other components within a range that does not impair odor adsorbability and heat sealability.
Film formation is possible if the total thickness of the odor adsorbing sealant layer is 5 μm or more, but 10 μm to 200 μm is preferable in order to obtain good film forming properties and heat sealability, interlayer adhesion strength and odor adsorbing properties. .

[Non-odor adsorption sealant layer]
The non-odor adsorbing sealant layer in the present invention is a layer containing the thermoplastic resin C and not containing an odor adsorbent.
The non-odor adsorbing sealant layer containing no odor adsorbent is superior in heat sealability to the odor adsorbing sealant layer containing the odor adsorbent. From this property, it is preferable that the non-odor adsorbing sealant layer is laminated on one side or both sides of the odor adsorbing sealant layer. With this laminated structure, the odor adsorbing sealant layer can be firmly bonded in the laminated body, or the laminated bodies can be firmly heat-sealed.

(Method for forming and laminating sealant layer)
In the present invention, the film forming and laminating method of the sealant layer is not particularly limited, and a known or conventional film forming method and laminating method can be applied. For example, it can be formed by an inflation method, a casting method, or an extrusion method (extrusion method, co-extrusion method).
A sealant layer formed in advance may be laminated on the multilayer through an adhesive layer by dry lamination, non-solvent lamination, sand lamination, or the like.

Alternatively, a resin composition for forming a sealant layer is heated and melted on a multilayer using an extrusion method, and is expanded and stretched in a necessary width direction with a T die and extruded into a curtain shape. By flowing down onto the surface to be laminated and sandwiched between a rubber roll and a cooled metal roll, formation of the sealant layer, adhesion to the surface to be laminated and lamination can be performed simultaneously. If necessary, the adhesion may be performed via an adhesive layer.
Here, in any of the film forming / laminating methods described above, the sealant layer may be composed of a plurality of odor adsorbing sealant layers and non-odor adsorbing sealant layers, and the multilayers are bonded via an adhesive. It may be.

<Odor adsorption film for packaging materials>
The odor adsorption laminated body of this invention can be used as an odor adsorption film for packaging materials. <Odor adsorption packaging material>
An odor adsorbing packaging material can be produced using the odor adsorbing film for packaging material of the present invention.
When producing a packaging bag using the odor-adsorbing packaging material of the present invention, for example, the packaging material is folded or overlapped so that the surfaces with good heat-sealing properties face each other, and the peripheral edge thereof is For example, side seal type, two-side seal type, three-side seal type, four-side seal type, envelope-attached seal type, joint-attached seal type (pillow seal type), pleated seal type, flat bottom seal type, square bottom seal type, gusset type It can produce by heat-sealing by the heat-sealing form, such as.
As a heat sealing method, known methods such as a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, and an ultrasonic seal can be applied.

<Odor adsorbing packaging material for BIB>
The odor adsorbing packaging material of the present invention can be used as an odor adsorbing packaging material for BIB.
In particular, it can be used as an odor-adsorbing liquid content packaging material for BIB intended for liquid contents.
In the present invention, examples of the liquid contents include seasoning liquids such as drinking water, juices, drip infusions, soy sauce and sauces, and liquids such as soup, honey, sauce and dressing.

Details of the raw materials used in the examples are as follows.
PET film 1: manufactured by Toyobo Co., Ltd., T4102, single-sided corona treatment, thickness 12 μm.
Aluminum foil 1: 7 μm thickness, manufactured by Toyo Aluminum Co., Ltd.
[Resin component of sealant film]

[Resin component of adhesive layer (extrusion coating)]
LC600A: manufactured by Nippon Polyethylene Co., Ltd., LDPE, MFR: 7.0 g / 10
Min, density: 0.918 g / cm ³
[Resin component of adhesive layer (dry lamination)]
Dry laminate adhesive 1: RU004 / H-1 manufactured by Rock Paint Co., Ltd. Polyester adhesive, coating amount 3.5 g / m ^{2 for} each adhesive layer, drying temperature 70 ° C.
[Odor adsorbent]
-Kesmon NS-241: Toagosei Co., Ltd., an amino group-containing compound-carrying inorganic porous material. Average particle size 3.5 μm.
[Hydrophobic zeolite]
・ Mizuka Sieves EX-122: Made by Mizusawa Chemical Co., Ltd. SiO ₂ / AL ₂ O ₃ molar ratio = 32/1, average particle diameter = 2.5 to 5.5 μm.
-Shilton MT400: manufactured by Mizusawa Chemical Industry Co., Ltd. SiO ₂ / AL ₂ O ₃ molar ratio = 400/1, the average particle size = 5 to 7 .mu.m.
-Shilton MT2000: manufactured by Mizusawa Chemical Co., Ltd. SiO ₂ / AL ₂ O ₃ molar ratio = 2000/1, average particle diameter = 2-4 μm.
-Shilton MT-8000: manufactured by Mizusawa Chemical Co., Ltd. SiO ₂ / AL ₂ O ₃ molar ratio = 8000/1, average particle diameter = 0.8 μm.
-Hydrophilic zeolite: Mizusuka Sieves Y-420 manufactured by Mizusawa Chemical Co., Ltd. SiO ₂ / AL ₂ O ₃ molar ratio = 5/1, average particle size = 5 μm.

[Master batch adjustment]
The master batch was prepared by adjusting as follows.
(Adjustment of master batch 1)
Novatec LC600A which is LLDPE as thermoplastic resin A and Mizuka Sieves EX-122 which is hydrophobic zeolite of odor adsorbent were melt blended at the following ratio to obtain master batch 1 (MB1).
Novatec LC600A 90 parts by weight Mizuka Sieves EX-122 10 parts by weight

(Adjustment of master batches 2-7)
According to the composition of Table 2, the thermoplastic resin A and the odor adsorbent were melt blended in the same manner as in the master batch 1 to obtain master batches 2 to 7 (MB2 to 7).

[Adjustment of Odor Adsorption Sealant Layer Resin Composition]
(Preparation of Odor Adsorption Sealant Layer Resin Composition 1)
Master batch 1 (MB1) and Ultzex 1520L, which is LLDPE as thermoplastic resin C, were melt blended in the following ratio to obtain odor adsorbing sealant layer resin composition 1.
Masterbatch 1 16.7 parts by weight ULTZEX 1520L 83.3 parts by weight

(Adjustment of odor adsorption sealant layer resin compositions 2 to 12)
According to the composition in Table 3, the master batch and the thermoplastic resin C were melt blended in the same manner as in the odor adsorption sealant layer resin composition 1 to obtain odor adsorption sealant layer resin compositions 2 to 12.

[Adjustment of adhesive layer resin composition]
(Preparation of adhesive layer resin composition 1)
Mizuka Sieves EX-122, which is a hydrophobic zeolite of odor adsorbent, and dry laminate adhesive 1, which is an adhesive, were mixed at the following ratio to obtain an adhesive layer resin composition 1.
Mizuka Sieves EX-122 10 parts by mass Dry Laminate Adhesive 1 90 parts by mass

(Adjustment of adhesive layer resin compositions 2 to 12)
According to the composition of Table 4, the odor adsorbent or masterbatch and the adhesive were melt blended in the same manner as in the adhesive layer resin composition 1 to obtain adhesive layer resin compositions 2 to 12.

<Example 1>
The odor adsorbing sealant layer resin composition 1 for the odor adsorbing sealant layer and the Ultrazex 1520L for the non-odor adsorbing sealant layer are laminated by inflation film formation at 160 ° C., and the non-odor adsorbing layer (10 μm) / odor adsorbing layer A sealant film having a three-layer structure of (30 μm) / non-odor adsorbing layer (10 μm) was obtained.
Then, the corona-treated surface of the PET film 1, was dried in the coating to 70 ° C. so that the dry lamination adhesive 1 after drying coating amount 3.5 g / m ^2, the aluminum foil 1 is laminated by a dry lamination method Thus, a laminate precursor was obtained.
And the adhesive 1 as a non-odor adsorption adhesion layer was apply | coated so that it might become a coating amount 3.5g / m < ² > after drying on the aluminum foil 1 surface of a laminated body precursor, and it dried at 70 degreeC.
Subsequently, the three-layer sealant film obtained above was laminated on one surface of the dry laminate adhesive to obtain an odor adsorbing laminate.

The layer structure of the obtained odor adsorption laminate is as follows. Detailed layer structure and evaluation results are shown in Table 5.
PET film 1 (12 μm) / adhesive layer (3.5 g / m ² ) / aluminum foil 1 (7 μm) / non-odor adhering adhesive layer (3.5 g / m ² ) / non-odor adsorbing layer (10 μm) / odor adsorbing layer (30 μm) / non-odor adsorbing layer (10 μm)

<Examples 2-8, 10-12>
A sealant film was obtained in the same manner as in Example 1 except that the resin for the non-odor adsorbing sealant layer and the odor adsorbing sealant layer resin composition were changed to those described in Table 5.
Subsequently, it operated similarly to Example 1 and obtained the laminated body precursor.
Then, a non-odor adhering adhesive layer was formed on the laminate precursor in the same manner as in Example 1, and the sealant film obtained above was laminated to obtain an odor adsorbing laminate. The detailed layer structure and evaluation results are shown in Tables 5 and 6.

<Example 9>
A sealant film was obtained in the same manner as in Example 1 except that the sealant film had a single-layer structure of only an odor adsorption sealant layer (50 μm) using only the odor adsorption sealant layer resin composition 9.
Next, a laminate precursor was prepared in the same manner as in Example 1, a non-odor adsorbing adhesive layer was formed, and the sealant film obtained above was laminated to obtain an odor adsorbing laminate. The detailed layer structure and evaluation results are shown in Table 6.

<Example 13>
First, a sealant film was obtained in the same manner as in Example 1 except that the odor adsorption sealant layer resin composition 1 was changed to the odor adsorption sealant layer resin composition 2.
Next, a laminate precursor was prepared in the same manner as in Example 1.
On the surface of the aluminum foil of the obtained laminate precursor, an adhesive layer resin composition 1 for dry lamination as an odor adsorbing adhesive layer was applied so that the applied amount after drying was 3.5 g / m ^2. And dried at 70 ° C.
Subsequently, the sealant film obtained above was laminated on one surface of the adhesive layer resin composition to obtain an odor adsorbing laminate. Detailed layer structure and evaluation results are shown in Table 5.

<Examples 14 to 16, Comparative Example 3>
An odor adsorbing laminate was obtained in the same manner as in Example 11 except that the adhesive layer resin composition 1 was changed to the adhesive layer resin compositions 2 to 5 in the combinations described in Table 5. The detailed layer structure and evaluation results are shown in Table 6.

<Examples 17 to 23>
The odor adsorbing laminate was operated in the same manner as in Example 11 except that the odor adhering adhesive layer was changed to the extruding adhesive layer resin compositions 6 to 11 and laminated so as to have a layer thickness of 15 μm. Got. Detailed layer configurations and evaluation results are shown in Tables 7 and 8.

<Example 24>
An odor adsorbing laminate was obtained in the same manner as in Example 23 except that the sealant layer was only a non-odor adsorbing sealant layer made of 50 μm thick Ultzex 1520L. Detailed layer configuration and evaluation results are shown in Table 8.

<Comparative Example 1>
A sealant film consisting of a single layer consisting only of a non-odor adsorbing sealant layer consisting of ULTZEX 1520L was produced.
Subsequently, it operated like Example 1, and obtained the laminated body precursor.
And it operated similarly to Example 1 and obtained the odor adsorption laminated body. Detailed layer structure and evaluation results are shown in Table 8.

<Comparative Example 2>
The sealant film which consists only of the odor adsorption sealant layer which consists of the odor adsorption sealant layer resin composition 12 was produced.
Subsequently, it operated like Example 1, and obtained the laminated body precursor.
And it operated similarly to Example 1 and obtained the odor adsorption laminated body. Detailed layer structure and evaluation results are shown in Table 8.

<Evaluation method>
[Heat sealability]
The odor adsorbing laminates prepared in Examples and Comparative Examples were cut into 10 cm × 10 cm, folded in half and overlapped, and a 1 cm × 10 cm region using a heat seal tester (Tester Sangyo Co., Ltd .: TP-701-A). The end portion was not heat-sealed and not bonded, and a sample in a bifurcated state was produced.

This sample was cut into a strip shape with a width of 15 mm, each end divided into two forks was attached to a tensile tester, and the tensile strength (N / 15 mm) was measured to make a pass / fail decision.
(Heat seal condition)
Temperature: 160 ° C
Pressure: 1kgf / cm ²
Time: 1 second (Tensile strength test condition)
Test speed: 300mm / min Load range: 50N
(Pass / fail criteria)
○: 30 N / 15 mm or more, which is acceptable.
X: It is less than 30N / 15mm, and fails.

[Odor change]
Pouch bags (13 cm × 17 cm) were prepared using the odor adsorbing laminates obtained in Examples and Comparative Examples, and the inner surface of each laminate was preliminarily subjected to UV irradiation sterilization treatment.
Each package thus obtained was hot-pack filled with 100 g of water at 65 ° C. (manufactured by Suntory Co., Ltd., Alps natural water) to prepare a package liquid filling, and stored at 10 ° C. for 1 week. Sensory evaluation was carried out on the odor change.

The evaluation index is as follows. There were five participants in the sensory evaluation experiment, and the average value was calculated as the evaluation result.
1: Smell is strong 2: Smell is slightly reduced 3: Smell is greatly reduced 4: Equivalent to water before filling

<Summary of results>
The package of all the examples to which the sealant film to which the odor adsorbent was added and the adhesive layer (extrusion coating layer, dry laminate layer) were applied obtained good heat sealability and sensory evaluation results.
In Comparative Example 1 containing no odor adsorbent, the heat sealability was good, but the sensory evaluation was not improved, and the odor adsorbent was excessive in the sealant film and the adhesive layer (extrusion coating layer, dry laminate layer). In Comparative Examples 2 and 3, including the sensory evaluation, the heat sealability tended to deteriorate.

1. Odor adsorbing laminate 2. Base material layer 3. Adhesive layer, adhesive layer 3a. Odor adsorbing adhesive layer 3b. 3. Non-odor adhering adhesive layer Sealant layer 4a. Odor adsorption sealant layer 4b. Non-odor adsorption sealant layer10. Chemical adsorbent-supporting inorganic porous material

Claims (18)

It is an odor adsorbing laminate including at least a base material layer, an adhesive layer, and a sealant layer,
The adhesive layer and / or the sealant layer contains an odor adsorbent,
When the adhesive layer contains the odor adsorbent, the content of the odor adsorbent in the adhesive layer is 0.3 mass% or more and 50 mass% or less,
When the sealant layer contains the odor adsorbent, the content of the odor adsorbent in the sealant layer is 0.3 mass% or more and 15 mass% or less,
The odor adsorbent, the molar ratio of SiO ₂ / Al ₂ O ₃ is 30/1 or more, including 8000/1 less hydrophobic zeolite, odor adsorbing laminate.   The odor adsorbing laminate according to claim 1, wherein the adhesive layer is a dry laminate adhesive layer or a non-solvent laminate adhesive layer. The adhesive layer is an extrusion coat adhesive layer or a sand laminate adhesive layer;
The content of the odor adsorbent in the adhesive layer is 0.3% by mass or more and 15% by mass or less.
The odor adsorbing laminate according to claim 1.   The odor adsorbing laminate according to any one of claims 1 to 3, wherein the odor adsorbing material further includes a chemical adsorbent-supporting inorganic porous material.   The odor adsorbent is melt kneaded in advance at a mass ratio of the thermoplastic resin A and the odor adsorbent / thermoplastic resin of 0.5 / 99.5 or more and 40/60 or less. Item 5. The odor adsorption laminate according to any one of Items 1 to 4.   6. The adhesive layer according to claim 1, wherein the adhesive layer further contains one or more selected from the group consisting of a polyurethane resin, a polyester resin, a polyamide resin, and a polyolefin resin. Of odor adsorption laminate.   The sealant layer according to any one of claims 1 to 6, further comprising the thermoplastic resin C having a melt flow rate of 0.2 g / 10 min or more and 10.0 g / 10 min or less. Odor adsorption laminate. The adhesive layer includes an odor adsorbing adhesive layer containing an odor adsorbent, and a non-odor adhering adhesive layer not containing an odor adsorbent,
The non-odor adhering adhesive layer is in contact with one or both sides of the odor adsorbing adhesive layer,
The odor adsorption laminated body of any one of Claims 1-7. The sealant layer includes an odor adsorbing sealant layer containing an odor adsorbent, and a non-odor adsorbing sealant layer not containing an odor adsorbent,
The odor adsorption laminate according to any one of claims 1 to 8, wherein the non-odor adsorption sealant layer is in contact with one side or both sides of the odor adsorption sealant layer. The content of the hydrophobic zeolite in the adhesive layer is 0.3 mass% or more and 13 mass% or less,
The odor adsorbing laminate according to any one of claims 4 to 9, wherein the content of the chemical adsorbent-supporting inorganic porous material in the adhesive layer is 0.3 mass% or more and 10 mass% or less. body. The content of the hydrophobic zeolite in the sealant layer is 0.1% by mass or more and 13% by mass or less,
The odor adsorbing laminate according to any one of claims 4 to 10, wherein the content of the chemical adsorbent-supporting inorganic porous material in the sealant layer is 0.1 mass% or more and 10 mass% or less. body.   The chemical adsorbent of the chemical adsorbent-supporting inorganic porous material has a functional group that is reactive with one or more selected from the group consisting of aldehydes, ketones, and carboxylic acids. The odor adsorption laminated body of any one of these.   The odor adsorbing laminate according to claim 12, wherein the chemical adsorbent has an amino group.   The odor adsorption film for packaging materials which consists of an odor adsorption laminated body of any one of Claims 1-13.   The odor adsorption packaging material which consists of the odor adsorption film for packaging materials of Claim 14. At least an odor adsorbing packaging material consisting of an outer layer film and an inner layer film,
The outer layer film and / or the inner layer film comprises the odor adsorbing film for packaging material according to claim 14,
The outer layer film and the inner layer film are odor adsorbing packaging materials that are only partially bonded to each other.   The odor adsorption packaging material for BIB produced from the odor adsorption packaging material of Claim 16.   An odor adsorbing liquid content packaging material for BIB made from the odor adsorbing packaging material according to claim 16.

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