JP7419664B2 - Deodorizing PTP packaging - Google Patents

Description

The present invention prevents the contents packaged in the package from having a strange taste or odor, prevents the odor components from filling the package and causing an unpleasant odor when the package is opened, and prevents the contents from being affected by moisture. The present invention relates to a deodorizing PTP packaging body that prevents the contents from becoming contaminated and has excellent long-term odor and taste change resistance and moisture deterioration resistance of the contents.

Regarding packaging materials, a packaging material containing an odor adsorbent that adsorbs odors has been proposed (Patent Document 1). In such packaging materials, odor absorbers such as synthetic zeolite and activated carbon are kneaded into the resin material.
However, such packaging materials have the problem of adsorbing not only odors but also moisture in the atmosphere, and once adsorbed odors are released, so it is not possible to obtain a sufficient odor adsorption effect. Not yet.

Packaging materials containing an odor adsorbent made by supporting a chemical adsorbent on an inorganic porous material are also known (Patent Document 2), but the main adsorption target is an odor component having a specific functional group. However, if a resin material is not selected, the amount of organic substances not having functional groups generated cannot be suppressed, and odor components cannot be sufficiently adsorbed.

Furthermore, hygroscopic packaging materials are known that suppress the generation of strange odors due to hydrolysis of the contents (Patent Document 3), but although they have the effect of suppressing odor generation, the odor components generated remain as they are. However, sufficient odor improvement effects were not obtained.

Patent No. 2538487 Japanese Patent Application Publication No. 2014-233408 Japanese Patent Application Publication No. 2006-327690

The present invention solves the above-mentioned problems and is excellent in manufacturing suitability, and when the contents packaged in the package are foods or medicines, odor components generated by hydrolysis can cause the contents to have an unpleasant taste. It prevents the occurrence of strange odors and improves odor and taste, prevents the odor component from filling the package and causing a strange odor when opened, and is useful for electronic parts, electronic equipment, industrial materials, etc. whose contents do not like moisture. In this case, it is an object of the present invention to provide a deodorizing PTP (press-through pack) package that prevents deterioration and has excellent long-term resistance to odor and taste change and resistance to deterioration due to moisture.

As a result of various studies, the present inventors have discovered a gas adsorption bottom material that includes a sealant layer that has a specific deodorizing or hydrolysis inhibiting effect, and a gas adsorption barrier that includes a sealant layer that has a specific deodorizing or hydrolysis inhibiting effect. It has been found that a deodorizing PTP package comprising a lid material achieves the above object.

That is, the present invention is characterized by the following points.
1. A deodorizing PTP packaging body consisting of a gas adsorption bottom material having a plurality of concave accommodating parts for accommodating contents, and a gas adsorption barrier lid material that closes the opening of the concave accommodating part,
The gas adsorption bottom material is a laminate having a base material layer and a sealant layer,
The sealant layer has one type selected from the group consisting of a deodorizing layer and a hydrolysis inhibiting layer, and is a layer closer to the recessed housing than the base layer,
The gas adsorption barrier lid material is a laminate having a gas barrier layer and a sealant coating layer,
The sealant coating layer has one type selected from the group consisting of a deodorizing coating layer and a hydrolysis inhibiting coating layer, and is a layer closer to the recessed housing than the gas barrier layer,
The deodorizing PTP package has one type selected from the group consisting of the deodorizing layer and the deodorizing coating layer, and one type selected from the group consisting of the hydrolysis inhibiting layer and the hydrolysis inhibiting coating layer. ,
The deodorizing layer and the deodorizing coating layer contain a deodorant and a polyolefin resin,
The deodorant is one or more selected from the group consisting of a chemical odor adsorbent, a hydrophobic zeolite with a SiO ₂ /Al ₂ O ₃ molar ratio of 30/1 to 10,000/1, and an odor-decomposable metal compound. Contains
The hydrolysis inhibiting layer and the hydrolysis inhibiting coating layer contain a hydrolysis inhibitor and a polyolefin resin,
The hydrolysis inhibitor is one selected from the group consisting of hygroscopic alkali metal compounds, hygroscopic alkaline earth metal compounds, and hydrophilic zeolites with a SiO ₂ /Al ₂ O ₃ molar ratio of 1/1 to 20/1. or contains two or more types,
The content of the deodorant in the deodorizing layer is 0.5% by mass to 15% by mass,
A deodorizing PTP package, characterized in that the content of the hydrolysis inhibitor in the hydrolysis inhibiting layer is 1% by mass to 50% by mass.
2. The layer farthest from the base material layer of the sealant layer and/or the layer closest to the base material layer contains a polyolefin resin and does not contain the deodorant and the hydrolysis inhibitor,
The deodorizing PTP package described in 1 above.
3. The polyolefin resin is LDPE and/or LLDPE with a density of 0.90 g/cm ³ or more and 0.94 g/cm ³ or less,
The deodorizing PTP package according to 1 or 2 above.
4. The content of the deodorant in the deodorizing coating layer is 1% by mass to 60% by mass,
The content of the hydrolysis inhibitor in the hydrolysis-inhibiting coating layer is 1% by mass to 40% by mass,
The deodorizing PTP package according to any one of 1 to 3 above.
5. The gas adsorption bottom material and/or the gas adsorption barrier lid material, which is used in the deodorizing PTP package described in any one of 1 to 4 above.

The deodorizing PTP packaging body of the present invention has excellent manufacturing suitability and prevents the contents packaged in the packaging body from deteriorating due to moisture and causing odor components generated by hydrolysis to cause the contents to have a strange taste or odor. When the contents are food or medicine, it provides an odor and taste improvement effect, prevents the odor component from filling the package and causing an unpleasant odor when opened, and prevents the contents from moisture-sensitive electronic parts and electronic devices. , in the case of industrial materials, etc., deterioration can be prevented.
In addition, since once adsorbed odor and moisture are efficiently adsorbed without being easily released, it is possible to provide a deodorizing package that exhibits high moisture absorption and deodorizing effects over a long period of time.
Therefore, the deodorizing package of the present invention is suitable for use as a package for dried foods, medicines, medical products, moisture-sensitive electronic parts, electronic equipment, and industrial materials.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic external view which shows an example of the deodorizing package of this invention. FIG. 1 is a schematic cross-sectional view showing an example of the layer structure of the deodorizing package of the present invention. It is a schematic sectional view showing an example of another aspect about the layer composition of the deodorant package of the present invention. It is a schematic sectional view showing an example of still another aspect about the layer composition of the deodorant package of the present invention. FIG. 2 is a schematic diagram showing the odor adsorption mechanism of an inorganic porous body supporting a chemical odor adsorbent in the present invention.

In each figure, the sizes and proportions of members may be changed or exaggerated for ease of understanding. Further, for ease of viewing, parts unnecessary for explanation or repetitive symbols may be omitted.
Furthermore, in each figure, although the uneven portions are illustrated as patterns having clear corners, they may have shapes with rounded corners.
In the present invention, film and sheet are described as having the same meaning.

The deodorizing PTP package of the present invention will be explained in more detail below. Although the present invention will be explained by showing specific examples, the present invention is not limited thereto.

<Deodorizing PTP packaging>
As shown in FIGS. 1 to 4, the deodorizing PTP packaging body of the present invention includes a gas adsorption bottom material having a plurality of concave accommodating portions for accommodating contents, and a gas adsorption barrier lid material that closes the openings. It is a deodorizing PTP packaging body consisting of.
The deodorizing PTP package includes one type selected from the group consisting of a deodorizing layer of a gas adsorption bottom material and a deodorizing coating layer of a gas adsorption barrier lid material, a hydrolysis suppressing layer of the gas adsorption bottom material and a gas adsorption barrier lid. and one type selected from the group consisting of coating layers for inhibiting hydrolysis of materials.
The deodorizing PTP packaging shown in Fig. 1 can be arranged in multiple pieces, for example, 3 columns x 7 rows = 21 pieces, 2 columns x 5 rows = 10 pieces, 2 columns x 3 rows = 6 pieces, etc. may be connected.
As shown in FIGS. 2 to 4, the deodorizing PTP package is produced by stacking the two laminates so that the sealant layer on the surface of the gas adsorption bottom material and the sealant coating layer on the surface of the gas adsorption barrier lid material face each other and heating them. It is formed by sealing.
The contents of the deodorizing PTP package can be easily taken out by pushing the concave accommodating portion from the outside, pressing the contents against the gas adsorption barrier lid, and tearing the gas adsorption barrier lid.

[Method for producing deodorizing PTP packaging]
First, a flat gas adsorption bottom material is placed in a molding machine so that the surface on the sealant layer side is inside the deodorizing PTP package to form a concave accommodating portion. In the present invention, the concave accommodating part can be formed by a conventional method, and the concave accommodating part is formed by vacuum forming, pressure forming, etc. according to the shape of the contents to be packaged. .
Then, the contents are stored in the concave housing part, and then the gas adsorption barrier lid material is placed so that the sealant coating layer surface is in contact with the gas adsorption bottom material, and the gas adsorption bottom material other than the concave housing part is in contact with the gas adsorption barrier lid material. The deodorizing PTP package of the present invention can be manufactured by heat-sealing and sealing the parts.
As the heat sealing method, for example, known methods such as bar sealing, rotating roll sealing, belt sealing, impulse sealing, high frequency sealing, ultrasonic sealing, etc. can be applied.

<<Gas adsorption bottom material>>
The gas adsorption bottom material has a plurality of concave accommodating portions for accommodating contents. The cross-sectional shape of the concave accommodating portion is not particularly limited, and may be semicircular, box-shaped, or the like.
The gas adsorption bottom material is a laminate having at least a base material layer and a sealant layer, and the sealant layer is the outermost layer on one side of the gas adsorption bottom material.
The gas adsorption bottom material may further include an intermediate layer having various functions, an adhesive layer for bonding these layers, etc., as necessary.
The concave accommodating portion of the gas adsorption bottom material can be formed by a publicly known method. For example, it can be performed using a cold press using a mold.

<Base material layer>
It is preferable to use a resin film for the base material layer, and it may be configured with one layer, or may have a multilayer configuration including two or more layers of resin films having the same or different compositions.
In addition, in order to improve adhesion between each layer constituting the base material layer or with other layers, an adhesive layer may be provided, or the surface of each layer may be subjected to a desired surface treatment in advance, if necessary. layers can be provided.
For example, pretreatment such as corona discharge treatment, ozone treatment, low-temperature plasma treatment using oxygen gas or nitrogen gas, glow discharge treatment, oxidation treatment using chemicals, etc. is optionally performed to form a corona treatment layer, ozone treatment, etc. A layer, a plasma treatment layer, an oxidation treatment layer, etc. can be formed and provided.
Alternatively, various coating agent layers such as a primer coating agent layer, an undercoating agent layer, an anchor coating agent layer, an adhesive layer, and a vapor-deposited anchor coating agent layer can be optionally formed on the surface to form a surface treatment layer. .

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

The thickness of the base layer depends on the material, but in the case of a resin film, it is preferably 100 to 400 μm, more preferably 150 to 350 μm.

The resin film used for the base material layer can be made of thermoplastic resin, which has excellent chemical or physical strength, can withstand the conditions for forming a vapor deposited film of metal oxides, and is capable of resisting metal oxides. It is preferable to use a thermoplastic resin that can maintain the properties of the deposited film well without impairing the properties of the deposited film.
Examples of such resins include polyvinyl chloride (PVC); polyvinylidene chloride (PVDC); polyester resins such as polycarbonate resins, polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate; polyethylene resins or polypropylene resins. , polyolefin resins such as cyclic polyolefin resins; polyamide resins such as various nylons; polyimide resins; polyvinyl alcohol resins such as polyvinyl alcohol and ethylene-vinyl alcohol copolymers; acetal resins; various cellulose resins, etc. The following resins are mentioned.
In the present invention, polyvinyl chloride (PVC) and polyvinylidene chloride (PVDC) are preferred as the resin. Note that PVDC may be a copolymer with PVC or acrylonitrile or the like.

In the present invention, the thermoplastic resin used for the base material layer can be formed into a film by various known and publicly used film forming methods.
For example, one type of resin is used to form a film using a film forming method such as extrusion, cast molding, T-die method, cutting method, inflation method, calendaring, etc., or two or more types of resin are used to form a film. Examples include a method in which a multilayer coextrusion film is formed by using the resin, a method in which two or more resins are mixed before forming a film, and a film is formed by the above-mentioned film forming method. Furthermore, the film can be uniaxially or biaxially stretched using a tenter method, a tube laminator method, or the like.

Alternatively, it is also possible to coat another resin film by applying and drying one or more resins, or to laminate melted resins by a T-die method or the like.
In the present invention, as the resin film, a PVC/PVDC film having a PVC layer and a PVDC layer, and a PP film are preferably used.

In addition, when forming a resin film, for example, the processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant property, slipperiness, mold releasability, flame retardance, and resistance of the film are determined. Various plastic compounding agents and additives can be added for the purpose of improving or modifying mold resistance, electrical properties, strength, etc., and the amount of addition ranges from extremely small amounts to several tens of percent. It can be added arbitrarily depending on the purpose.
In the above, general additives include lubricants, crosslinking agents, antioxidants, ultraviolet absorbers, light stabilizers, fillers, reinforcing agents, antistatic agents, pigments, modifying resins, etc. be able to.

<Sealant layer>
The sealant layer is a layer of the gas adsorption bottom material that is closer to the recessed housing than the base material layer, is a surface layer, and is a layer in contact with the contents and the gas adsorption barrier lid material.
The sealant layer included in the gas adsorption bottom material has one type selected from the group consisting of a deodorizing layer and a hydrolysis inhibiting layer.
Further, the sealant layer may have a one-layer structure consisting of a deodorizing layer or a hydrolysis inhibiting layer, and if necessary, it may contain neither a deodorant nor a hydrolysis inhibitor, but may contain a polyolefin resin. It may have a multilayer structure of two or more layers including a heat seal layer.
That is, the sealant layer includes a deodorizing layer or a hydrolysis inhibiting layer, a heat sealing layer/deodorizing layer or a hydrolysis inhibiting layer, a deodorizing layer or a hydrolysis inhibiting layer/heat sealing layer, a heat sealing layer/deodorizing layer or a hydrolyzing layer. It can have a structure such as a decomposition suppressing layer/heat sealing layer.

The deodorizing layer or the hydrolysis inhibiting layer may or may not have heat-sealing properties, but if they do not have sufficient heat-sealing properties, they may not be heat-sealable with other layers. In order to improve sealing, it is preferable that the heat-sealing layer having heat-sealing properties is the layer furthest from the base layer and/or the layer closest to the base layer.
The sealant layer can further contain lubricants, antioxidants, antiblock agents, and other additives.

[Deodorizing layer]
In the present invention, the deodorizing layer refers to a sealant layer when the sealant layer is composed of only one layer, and a deodorizing layer in the sealant layer when the sealant layer is composed of multiple layers. It is also written as referring to both.
The deodorizing layer contains a deodorant and a polyolefin resin.
The content of the deodorant in the deodorizing layer is preferably 0.5% by mass to 15% by mass, more preferably 0.8% by mass to 15% by mass. When the amount is less than the above range, it is difficult to exhibit the deodorizing effect, and when it is more than the above range, film forming properties tend to deteriorate.

[Hydrolysis suppression layer]
In the present invention, the term "hydrolysis inhibiting layer" refers to a sealant layer when the sealant layer is composed of only one layer of the hydrolysis inhibiting layer, and a hydration in the sealant layer when the sealant layer is composed of multiple layers. It is also written as referring to both the decomposition-inhibiting layer and the decomposition-inhibiting layer.
The hydrolysis inhibiting layer contains a hydrolysis inhibitor and a polyolefin resin.
The content of the hydrolysis inhibitor in the hydrolysis inhibiting layer is preferably 1% to 50% by mass, more preferably 6% to 50% by mass. When the amount is less than the above range, it is difficult to exhibit the hydrolysis inhibiting effect, and when it is more than the above range, film forming properties tend to deteriorate.

[Method for forming and laminating sealant layer]
In the present invention, the film forming method and laminating method of the sealant layer or each layer constituting the sealant layer is not particularly limited, and any known or conventional film forming method or laminating method can be applied.
A sealant layer, deodorizing layer, or heat sealing layer can be laminated on top of other layers by extrusion or coextrusion using an extrusion coating method, or can be laminated via an adhesive layer after film formation by an inflation method or casting method. You can also Even in the case of the extrusion coating method, lamination may be performed via an adhesive layer if necessary.
Alternatively, pre-formed films for the sealant layer, deodorant layer, and heat seal layer are laminated and bonded via an adhesive layer laminated by an extrusion coating method, dry lamination method, non-solvent lamination method, etc. Good too.

When laminating by the extrusion coating method, first, the resin composition that forms the sealant layer, deodorant layer, heat seal layer, etc. is heated and melted, and then expanded and stretched in the required width direction with a T die. The molten resin is (co-)extruded in a curtain shape, allowed to flow onto the surface to be laminated, and then sandwiched between a rubber roll and a cooled metal roll to form a sealant layer, deodorizing layer, heat seal layer, etc. Lamination and adhesion to the laminated surface, lamination and adhesion between the deodorizing layer and the heat-sealing layer, etc. can be performed simultaneously.
When laminated by extrusion coating method, the melt flow rate (MFR) of the resin component contained in the deodorizing sealant layer, deodorizing layer, and heat sealing layer is preferably 0.2 to 50 g/10 minutes, and 0.5 ~30g/10 minutes is more preferred. Note that in this specification, MFR is a value measured using a method based on JIS K7210.
If the MFR is less than 0.2 g/10 minutes or greater than 50 g/10 minutes, processing suitability tends to be poor.

When using the inflation method, the melt flow rate (MFR) of the resin component contained in the deodorizing sealant layer, deodorizing layer, and heat seal layer is preferably 0.2 to 10 g/10 minutes, and 0.2 to 9. 5 g/10 minutes is more preferable.
If the MFR is less than 0.2 g/10 minutes or greater than 10 g/10 minutes, processing suitability tends to be poor.

<<Gas adsorption barrier lid material>>
The gas adsorption barrier lid material is a laminate for closing the opening of the concave accommodating portion of the gas adsorption bottom material.
The gas adsorption barrier lid material is a laminate having at least a gas barrier layer and a sealant coating layer, and the sealant coating layer is the outermost layer on one side of the gas adsorption barrier lid material.
The gas adsorption barrier lid material may further include an intermediate layer having various functions, an adhesive layer for bonding these layers, etc., as necessary.

<Gas barrier layer>
The gas barrier layer is a layer that suppresses water vapor, oxygen, etc. from permeating from the outside to the inside of the deodorizing PTP package of the present invention and further into the contents, and prevents water vapor, oxygen, etc. Generation of odor substances and deterioration due to moisture can be suppressed.
For the gas barrier layer, one or more selected from the group consisting of a gas barrier resin coating, a metal foil, a resin film with a metal vapor deposited layer, and a resin film with a metal oxide vapor deposit layer can be used.
The gas barrier resin coating film is preferably a coating film containing a sol-gel hydrolyzed polycondensate formed from a metal alkoxide and a water-soluble polymer, and the metal foil is preferably an aluminum foil. As the resin film with an aluminum vapor deposited film, a resin film with an aluminum vapor deposited film is preferable, and as the resin film with a metal oxide vapor deposited layer, a resin film with an aluminum oxide vapor deposited film is preferable.

As a commercially available resin film with an aluminum oxide vapor-deposited film, for example, alumina-deposited IB-PET-PIR (thickness: 12 μm) and silica-deposited IB-ON-UB (15 μm thick).

The metal foil for the gas barrier layer, the resin film with a metal vapor deposition layer, or the resin film with a metal oxide vapor deposition layer can be bonded to other layers using a dry lamination adhesive.
Alternatively, the resin film for the base material layer can be used as the resin film with a metal vapor deposited layer or the resin film with a metal oxide vapor deposited layer, so that lamination on the base material layer can be omitted.

<Sealant coating layer>
The sealant coating layer is a surface layer of the gas adsorption barrier lid material that is in contact with the gas adsorption barrier lid material, and is a layer closer to the recessed housing than the gas barrier layer.
The sealant coating layer has one type selected from the group consisting of a deodorizing coating layer and a hydrolysis inhibiting coating layer.
Further, the sealant coating layer may have a one-layer structure consisting of a deodorizing coating layer or a hydrolysis inhibiting coating layer, and if necessary, it may contain neither a deodorant nor a hydrolysis inhibitor, and may be a polyolefin-based sealant coating layer. It may have a multilayer structure of two or more layers including a resin-containing layer with excellent heat sealability.
The sealant coating layer can further contain a lubricant, an antioxidant, an antiblock agent, and other additives.

[Deodorant coating layer]
In the present invention, the deodorizing coating layer refers to a sealant coating layer when the sealant coating layer is composed of only one layer of the deodorizing coating layer, and a sealant coating layer when the sealant coating layer is composed of multiple layers. It is also written as referring to both the deodorizing coating layer and the deodorizing coating layer in the layer.
The deodorizing coating layer contains a deodorant and a polyolefin resin, and is a layer formed by coating.
The content of the deodorant in the deodorizing coating layer is preferably 1% by mass to 60% by mass, more preferably 5% by mass to 60% by mass. When the amount is less than the above range, it is difficult to exhibit the deodorizing effect, and when it is more than the above range, film forming properties tend to deteriorate.

[Hydrolysis-inhibiting coating layer]
In the present invention, the hydrolysis-suppressing coating layer refers to a sealant coating layer when the sealant coating layer is composed of only one layer of the hydrolysis-suppressing coating layer, and a sealant coating layer when the sealant coating layer is composed of multiple layers. It is also written as referring to both the hydrolysis-suppressing coating layer in the sealant coating layer.
The hydrolysis inhibiting layer and the hydrolysis inhibiting coating layer are layers containing a hydrolysis inhibitor and a polyolefin resin, and are formed by coating.
The content of the hydrolysis inhibitor in the hydrolysis-inhibiting coating layer is preferably 1% by mass to 40% by mass, more preferably 5% by mass to 40% by mass. When the amount is less than the above range, it is difficult to exhibit the hydrolysis inhibitor effect, and when it is more than the above range, film forming properties tend to deteriorate.

[Method for forming and laminating sealant coating layer]
In the present invention, the sealant coating layer or the deodorizing coating layer or the hydrolysis inhibiting coating layer constituting the sealant coating layer may be formed or laminated by a known or conventional coating method or lamination method. I can do it.
For example, the resin composition for forming each layer may be applied on the other layers constituting the gas adsorption barrier lid material via an adhesive layer as necessary, using a gravure coating method, a roll coating method, a kiss coating method, etc. Film formation and lamination may be performed by coating and drying using a bar coating method or the like.
Alternatively, a film obtained by coating and drying a resin film or the like and peeling the film may be laminated on other layers constituting the gas adsorption barrier lid material via an adhesive or the like.

[About each ingredient]
(Deodorants)
A deodorant is a compound that has the effect of deodorizing the contents themselves and odor substances generated by hydrolysis of the contents.
The deodorant includes one or more selected from the group consisting of a chemical odor adsorbent, a hydrophobic zeolite with a SiO ₂ /Al ₂ O ₃ molar ratio of 30/1 to 10000/1, and an odor-decomposable metal compound. can be used.

A chemical odor adsorbent is a compound that has a reactive functional group that causes a chemical reaction and bonds with the contents themselves and odorous substances generated by hydrolysis of the contents, such as aldehydes, ketones, and carboxylic acids. It is a compound that has a functional group that has the reactivity to bond with other substances.
Examples of such compounds include amino group-containing compounds, carboxyl group-containing compounds, hydroxyl group-containing compounds, carbonates, hydrogen carbonates, and the like.

Specific examples of amino group-containing compounds include alkylamines such as ethylenediamine, diethylenetriamine, triethylenetriamine, phenylamines such as metaphenylenediamine, polyamines such as tetramethylenediamine and tetraethylenepentamine, ethanolamine, piperazine, piperidine, etc.
Specific examples of carboxyl group-containing compounds include 2-acrylamido-2-methylpropanesulfonic acid.

Specific examples of hydroxyl group-containing compounds include metal hydroxides such as sodium hydroxide, potassium hydroxide, magnesium hydroxide, and iron hydroxide.
Specific examples of carbonates include metal carbonates such as sodium carbonate and calcium carbonate.
Specific examples of hydrogen carbonates include metal hydrogen carbonates such as sodium hydrogen carbonate.
The chemical odor adsorbent can also be supported on an inorganic porous body and used as a chemical odor adsorbent-supported inorganic porous body.

The adsorption mechanism of the chemical odor adsorbent for odorous substances will be explained in more detail using specific examples shown in FIGS. 5(a) and 5(b), but the present invention is not limited thereto. In FIGS. 5(a) and 5(b), the chemical odor adsorbent is used, for example, supported on an inorganic porous body.
For example, when the odorous substance is a carboxylic acid-based odorous substance, a compound having, for example, a hydroxyl group can be used as the chemical odor adsorbent, as shown in FIG. 5(a). As a result, the carboxyl group and the hydroxyl group cause a chemical reaction and bond, and the odor substance is adsorbed.
Furthermore, when the odorous substance is an aldehyde, a compound having an amino group, for example, can be used as the chemical odor adsorbent, as shown in FIG. 5(b). As a result, the aldehyde group and the amino group cause a chemical reaction and bond, and the odor substance is adsorbed.

At this time, since the adsorption of the odorous substance is chemical adsorption, the odorous substance once adsorbed will not be desorbed, and the odor can be adsorbed efficiently.
Furthermore, unlike physical adsorbents in which odor and water vapor are adsorbed to the same adsorption site, the chemical odor adsorbent of the present invention binds odorous substances to specific functional groups of the chemical odor adsorbent, thereby adsorbing odor. It is less susceptible to various substances such as water vapor that reduce performance.

The SiO ₂ /Al ₂ O ₃ molar ratio of the hydrophobic zeolite is preferably from 30/1 to 10,000/1, more preferably from 35/1 to 9,000/1, even more preferably from 40/1 to 8,500/1.
Generally, the higher the SiO ₂ /Al ₂ O ₃ molar ratio of zeolite, the higher the hydrophobicity. As hydrophobicity increases, it becomes difficult to adsorb highly polar water molecules, and conversely, it has a high affinity for low polar odorous substances, hydrophobic gases, and lipophilic gases (including solvent gases). This makes it easier to absorb these substances. Further, due to the effects of alkali metals and alkaline earth metals such as Ca, Na, and K present on the zeolite surface, the zeolite surface exhibits basicity, and acidic gases are easily adsorbed by the neutralization reaction.
In the present invention, a hydrophobic zeolite having a molar ratio within the above range is preferably used in view of the balance between adsorption performance for odorous substances and ease of availability.
Furthermore, hydrophobic zeolite has high heat resistance and can maintain its adsorption effect on odorous substances even when exposed to high temperatures of 230° C. or higher.

The shape of the hydrophobic zeolite may be any external shape such as spherical, rod-like, elliptical, etc., and may be in any form such as powder, lump, or granule, but when dispersed in a resin, From the viewpoint of uniform dispersibility, kneading characteristics, film forming properties, etc., powder form is preferable.
In the present invention, the average particle size of the hydrophobic zeolite can be appropriately selected depending on the application, but it is preferably an average particle size of 0.01 μm to 10 μm. Here, the average particle diameter is a value measured by a dynamic light scattering method.
When the average particle diameter is smaller than 0.01 μm, aggregation of hydrophobic zeolite tends to occur, and dispersibility tends to decrease. Additionally, if the average particle size is larger than 10 μm, the film-forming properties of the layer containing hydrophobic zeolite tend to be poor, making it difficult to add much hydrophobic zeolite, and the surface area also decreases. However, there is a possibility that a sufficient deodorizing effect may not be obtained.

An odor-decomposable metal compound is a metal compound that has the effect of chemically decomposing odorous substances.
The odor-decomposable metal compound exhibits a deodorizing effect by ionizing the metal atoms held in the odor-decomposable metal compound and exerting a catalytic action that promotes the decomposition reaction of odorous substances.
Odor-decomposable metal compounds also have a high deodorizing effect on sulfur-based odorous substances.

The odor-decomposable metal compound is preferably an oxide and/or salt of one or more elements selected from the group consisting of Cu, Zn, Ag, Pt, Au, Fe, and alkali metals.
Examples of metal oxides include CuO, _Cu2O , ZnO, _Ag2O , _PtO2 , _{Au2O3 ,} FeO, _{Fe3O4 , Fe2O3 ,} CoO, _{Co2O3 , Co3O} . _4th grade is mentioned. Among these, CuO (copper (II) oxide) and ZnO are preferred.

Further, the odor-decomposable metal compound is an odor-decomposable metal compound composition further containing silicon oxide (SiO ₂ ), alkali metal oxide, alkaline earth metal oxide, boron oxide, aluminum oxide (Al ₂ O ₃ ), etc. It can also be formed from. By containing these, it becomes easier to prepare the odor-decomposable metal compound, the dispersibility of the odor-decomposable metal compound becomes better, the ionization becomes easier to control, the deodorizing effect increases, and furthermore, the odor-decomposable metal compound The chemical durability and water resistance of the compound are improved, metal precipitation is suppressed, and the deodorizing effect can be easily maintained.
Powdered odor-decomposable metal compounds are prepared by mixing each raw material to prepare an odor-decomposable metal compound composition, melting and homogenizing it by a conventional method similar to the production of general-purpose glass such as bottle glass, and cooling it. It can be obtained by grinding.

Odor-decomposing metal compounds act as catalysts to promote the decomposition reaction of odorous substances, so they can increase the deodorizing capacity by using chemical adsorption or physical adsorption, compared to those that depend on surface area, and have a greater deodorizing effect. can be demonstrated stably over a long period of time.

The alkaline earth metal oxide is one or more selected from the group consisting of MgO, CaO, SrO, and BaO, and is a component contained in the odor-decomposable metal compound composition as necessary. It has the effect of improving the chemical durability of chemical metal compounds.
When the alkaline earth metal oxide is contained in the odor decomposable metal compound composition, the content of the alkaline earth metal oxide in the odor decomposable metal compound composition is preferably 2 to 10 mol%, and 2 to 7 mol%. Mol% is more preferred. If it is less than the above range, it will be difficult to fully exhibit the effect of containing the alkaline earth metal oxide, and if it is more than the above range, the melting point and melt viscosity of the odor-degradable metal compound will be too high, making it unsuitable. tends to become homogeneous.

The particle size distribution of the odor-decomposable metal compound is preferably such that the weight average particle size is 1 μm or more and 30 μm or less, and D ₉₆ is 40 μm or less. Here, the average particle diameter is a value measured by particle size distribution measurement using a dynamic light scattering method, and _D96 means a particle diameter at which the integral value corresponds to 96% by mass when cumulatively distributed.
If the average particle diameter is smaller than 1 μm, the odor-decomposable metal compound tends to aggregate, and its dispersibility in the sealant layer tends to decrease. In addition, if the average particle size is larger than 30 μm, the film forming properties of the sealant layer tend to be poor, making it difficult to add a large amount of odor-decomposing metal compounds, and the surface area also decreases, so It may be difficult to obtain a deodorizing effect.
When D ₉₆ exceeds 40 μm, uniform dispersion in the resin tends to be difficult, and there is a possibility that film-forming properties may deteriorate.
The odor-decomposable metal compound can also be used by being kneaded or supported on an inorganic substance.

(hydrolysis inhibitor)
The hydrolysis inhibitor is a hygroscopic compound for inhibiting hydrolysis of the contents. Since water is essential for hydrolysis of the contents, the hydrolysis inhibitor absorbs moisture and reduces the amount of water, thereby suppressing the progress of hydrolysis and suppressing the generation of odorous substances. Further, in the case where the contents are electronic parts, electronic equipment, industrial materials, etc. that dislike moisture, deterioration can be suppressed.
As the hydrolysis inhibitor, one or more types selected from the group consisting of hygroscopic alkali metal compounds, hygroscopic alkaline earth metal compounds, and hydrophilic zeolites can be used.

Specifically, the hygroscopic alkali metal compound or the hygroscopic alkaline earth metal compound is preferably Li ₂ O, Na ₂ O, K ₂ O, MgO, CaO, BaO, LiCl, or LiOH, and among these, MgO , CaO are more preferred.

The SiO ₂ /Al ₂ O ₃ molar ratio of the hydrophilic zeolite is preferably from 1/1 to 20/1, more preferably from 1.5/1 to 10/1, even more preferably from 2/1 to 5/1.
Generally, the lower the SiO ₂ /Al ₂ O ₃ molar ratio of zeolite, the higher the hydrophilicity. By becoming more hydrophilic, it becomes easier to adsorb highly polar water molecules, and conversely, it has a lower affinity with less polar odorous substances, hydrophobic gases, and lipophilic gases (including solvent gases). This makes it difficult to adsorb these substances.
In the present invention, a hydrophilic zeolite with a molar ratio within the above range is preferably used from the viewpoint of the balance between moisture absorption performance and availability.
Furthermore, hydrophilic zeolite has high heat resistance and can maintain its moisture absorption effect even when exposed to high temperatures of 230° C. or higher, and can also be used for high-temperature lamination at 230° C. or higher using extrusion.

The shape of the hydrolysis inhibitor may be any external shape such as spherical, rod-like, elliptical, etc., and may be in any form such as powder, lump, or granule. From the viewpoint of uniform dispersibility, kneading characteristics, film forming properties, etc., powder form is preferable.
In the present invention, the average particle size of the hydrolysis inhibitor can be appropriately selected from any average particle size depending on the application, but an average particle size of 0.01 μm to 10 μm is preferable. Here, the average particle diameter is a value measured by a dynamic light scattering method.
When the average particle diameter is smaller than 0.01 μm, the hydrolysis inhibitor tends to aggregate, and the dispersibility tends to decrease. In addition, if the average particle size is larger than 10 μm, the film-forming properties of the layer containing the hydrolysis inhibitor tend to be poor, making it difficult to add much of the hydrolysis inhibitor, and the surface area also decreases. Therefore, there is a possibility that a sufficient moisture absorption effect cannot be obtained.

(Polyolefin resin)
As the polyolefin resin, any known polyolefin resin can be used as long as it has good dispersibility of the deodorant or hydrolysis inhibitor and has heat sealability.
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. Low elution products such as ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylic acid copolymer, ethylene-propylene copolymer, etc. and mixtures of those resins.
Among the above, polyethylene resins are preferred, and among polyethylene resins, LDPE and/or LLDPE are more preferred, and LDPE and/or LLDPE with a density of 0.90 g/cm ³ or more and 0.94 g/cm ³ or less LLDPE is more preferred.

[Dispersion method of deodorant or hydrolysis inhibitor]
As a method for dispersing the deodorant or hydrolysis inhibitor in the polyolefin resin, a known or conventional kneading method can be applied.
It is also possible to directly mix and knead the deodorant or hydrolysis inhibitor with the polyolefin resin, or to mix the deodorant or hydrolysis inhibitor with the thermoplastic resin at a high concentration and then melt-knead ( It is also possible to use a so-called masterbatch method, in which a masterbatch is prepared by melt blending, and this is mixed and melt-kneaded with a polyolefin resin at a ratio according to the target content.
In the case of the masterbatch method, even a combination of a deodorant or a hydrolysis inhibitor and a polyolefin resin that tends to aggregate can be efficiently and homogeneously dispersed.

The content of the deodorant in the masterbatch is preferably 0.5% by mass or more and 40% by mass or less, more preferably 1% by mass or more and 20% by mass or less.
The content of the hydrolysis-inhibiting hygroscopic alkali metal compound in the masterbatch is preferably 0.5% by mass or more and 65% by mass or less, more preferably 1% by mass or more and 60% by mass or less.
The content of the hydrolysis-inhibiting hygroscopic alkaline earth metal compound in the masterbatch is preferably 0.5% by mass or more and 65% by mass or less, more preferably 1% by mass or more and 60% by mass or less.
The content of hydrophilic zeolite in the masterbatch is preferably 0.5% by mass or more and 65% by mass or less, more preferably 1% by mass or more and 60% by mass or less.
For each, if it is less than the above range, the degree of freedom in the content of the deodorant or hydrolysis inhibitor in the layer tends to decrease, and if it exceeds the above range, it tends to be difficult to obtain excellent dispersibility. .

Examples of the thermoplastic resin used in the masterbatch include polyolefin resins such as general-purpose polyethylene, polypropylene, methylpentene polymer, acid-modified polyolefin resin, and mixtures of these resins, but are not limited to these resins.
At this time, the thermoplastic resin in the masterbatch may be the same as or different from the polyolefin resin in the deodorizing layer, deodorizing coating layer, hydrolysis inhibiting layer, and hydrolysis inhibiting coating layer, and may be used for the purpose Depending on the requirements, it is possible to combine different types of resins within a range that does not have a large adverse effect on the heat-sealability and film-forming properties of each layer.
For example, if the same resin as the polyolefin resin in the deodorizing layer is used in the masterbatch, the deodorizing layer tends to be homogeneous and has good film formability, heat sealability, interlayer adhesion strength, and deodorizing properties. can be obtained efficiently.

<Raw materials>
Details of the raw materials used in the examples are as follows.

[Deodorants]
(Inorganic porous material supporting chemical odor adsorbent)
- Kesmon NS-241: Manufactured by Toagosei Co., Ltd., inorganic porous material supporting an amino group-containing compound. Average particle size 3.5 μm.
- Kesmon NS-80E: manufactured by Toagosei Co., Ltd., hydroxyl group-supported zirconium, average particle size 2 μm.
(Hydrophobic zeolite)
- Mizuka Thieves EX-122: Manufactured by Mizusawa Chemical Industry Co., Ltd. SiO ₂ /AL ₂ O ₃ molar ratio = 32/1, average particle size = 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, average particle diameter = 5 to 7 μm.
- Silton MT-8000: Manufactured by Mizusawa Chemical Industry Co., Ltd. SiO ₂ /AL ₂ O ₃ molar ratio = 8000/1, average particle diameter = 0.8 μm.

[Hydrolysis inhibitor]
(Hygroscopic alkaline earth metal compound)
- Calcium oxide: Manufactured by Kojundo Kagaku Kenkyusho Co., Ltd. Average particle size: 5 μm.
・Magnesium oxide: Manufactured by Kamishima Chemical Industry Co., Ltd. Starmag PSF-150, average particle size = 0.6 μm.
(hydrophilic zeolite)
- Mizuka Thieves 5AP: Manufactured by Mizusawa Chemical Industry Co., Ltd. SiO ₂ /AL ₂ O ₃ molar ratio = 2/1, average particle diameter = 5 μm.

[Heat sealing agent]
・MP-3405: Manufactured by Toyo Ink Co., Ltd. Heat sealing agent for AL/PP.
[others]
- PVC/PVDC sheet 1: F-9459 manufactured by Mitsubishi Chemical Corporation. Thickness: 240μm. - DL adhesive 1: Adhesive for dry lamination manufactured by Rock Paint Co., Ltd., RU004/H1.
- Aluminum foil 1: 20 μm thick.

<Preparation of adsorption heat sealing agent>
[Preparation of adsorption heat sealing agent 1]
MP-3405, a heat sealing agent, and Kesmon NS, an inorganic porous material supporting a chemical adsorbent.
-241 was mixed in the following ratio to obtain adsorption heat sealing agent 1 (AS1).
MP-3405 70 parts by mass Kesmon NS-241 30 parts by mass [Preparation of adsorption heat sealing agents 2 to 11]
Adsorption heat-sealing agents 2 to 11 (AS2 to AS11) were obtained according to the formulations in Tables 1 and 2 and in the same manner as adsorption heat-sealing agent 1.

<Preparation of masterbatch>
[Preparation of masterbatch 1]
Novatec LC600A (Japan Polyethylene Co., Ltd.), which is LDPE, and Kesmon NS-241, which is an inorganic porous material supporting a chemical odor adsorbent, were melt-blended in the following ratio to obtain masterbatch 1 (MB1).
Novatec LC600A 90 parts by mass Kesmon NS-241 10 parts by mass [Preparation of masterbatches 2 to 11]
According to the formulations in Tables 3 and 4, melt blending was performed in the same manner as masterbatch 1 to obtain masterbatches 2 to 11 (MB2 to 11).

[Example 1]
(Preparation of gas adsorption barrier lid material)
Adsorption heat sealing agent 9 (AS9) was gravure coated onto aluminum foil 1 to form a sealant coating layer (hydrolysis inhibiting coating layer) to obtain a gas adsorption barrier lid material.
(Preparation of gas adsorption bottom material)
Masterbatch 1 (MB1) and LLDPE resin (Evolu SP2020, manufactured by Prime Polymer Co., Ltd., MFR 2.3 g/10 minutes, density: 0.916 g/cm ³ ) were dry blended to create a mixture for the deodorizing layer. Obtained.
Masterbatch 1 (MB1) 83.3 parts by mass Evolu SP2020 16.7 parts by mass

Then, the mixture obtained above and LLDPE resin for the heat seal layer (Evolu SP2020, Prime Polymer Co., Ltd., MFR: 2.3 g/10 minutes, density: 0.916 g/cm ³ ) were made by inflation at 160°C. The membranes were laminated to obtain a film for a sealant layer having the following three-layer structure.
Heat seal layer (10 μm) / Deodorant layer (30 μm) / Heat seal layer (10 μm)
Next, the film for the sealant layer obtained above was subjected to dry lamination (drying temperature 70°C) via the PVC/PVDC sheet 1 for the base material layer and the DL adhesive 1 (coating amount 3.5 g/m ² ). By laminating them together, a gas adsorption bottom material having the following layer structure was obtained.
Base layer (240 μm) / Adhesive layer (3.5 g/m ² ) / Deodorant sealant layer [Heat seal layer (10 μm) / Deodorant layer (30 μm) / Heat seal layer (10 μm)]

(Production of deodorizing PTP packaging)
A concave accommodating portion was formed in the gas adsorption bottom material obtained above, and the gas adsorption barrier lid material, the sealant coating layer, and the sealant layer were stacked facing each other and heat-sealed to produce a deodorizing PTP package. .

(Various evaluations)
Various evaluations were performed on the gas adsorption bottom material, gas adsorption barrier lid material, and deodorizing PTP package obtained above. The evaluation results are shown in Table 9.

[Examples 2 to 12]
According to the descriptions in Tables 5 and 6, an adsorption heat sealing agent (AS) and a masterbatch (MB) were selected, and the operations were performed in the same manner as in Example 1 to form a gas adsorption barrier lid material, a gas adsorption bottom material, and a PTP package. was prepared and evaluated in the same manner. The evaluation results are shown in Tables 9 and 10.

[Example 13]
(Preparation of gas adsorption barrier lid material)
Adsorption heat sealing agent 1 (AS1) and adsorption heat sealing agent 2 (AS2) are mixed in the following formulation and gravure coated on aluminum foil (20 μm thick) to form a sealant coating layer (deodorizing coating layer), and gas adsorption. A barrier lid material was obtained.
Adsorption heat sealing agent 1 (AS1) 50 parts by mass Adsorption heat sealing agent 2 (AS2) 50 parts by mass (Preparation of gas adsorption bottom material)
Masterbatch 9 (MB9) and LLDPE resin (Evolu SP2020, manufactured by Prime Polymer Co., Ltd., MFR 2.3 g/10 minutes, density: 0.916 g/cm ³ ) are dry blended to create a mixture for the hydrolysis suppression layer. I got it.
Masterbatch 9 66.7 parts by mass Evolu SP2020 33.3 parts by mass

Then, the mixture obtained above and LLDPE resin for the heat seal layer (Evolu SP2020, Prime Polymer Co., Ltd., MFR: 2.3 g/10 minutes, density: 0.916 g/cm ³ ) were made by inflation at 160°C. The membranes were laminated to obtain a film for a deodorizing sealant layer having the following three-layer structure.
Heat seal layer (10 μm) / Hydrolysis suppression layer (30 μm) / Heat seal layer (10 μm)
Next, the film for the sealant layer obtained above was subjected to dry lamination (drying temperature 70°C) via the PVC/PVDC sheet 1 for the base material layer and the DL adhesive 1 (coating amount 3.5 g/m ² ). By laminating them together, a gas adsorption bottom material having the following layer structure was obtained.
Base layer (240 μm)/adhesive layer (3.5 g/m ² )/sealant layer [heat seal layer (10 μm)/hydrolysis suppression layer (30 μm)/heat seal layer (10 μm)]

(Production of deodorizing PTP packaging)
A concave accommodating portion was formed in the gas adsorption bottom material obtained above, and the gas adsorption barrier lid material and the sealant layers were stacked facing each other and heat sealed to produce a deodorizing PTP package.

(Various evaluations)
Various evaluations were conducted in the same manner as in Example 1 regarding the gas adsorption bottom material, gas adsorption barrier lid material, and deodorizing PTP packaging body obtained above. The evaluation results are shown in Table 11.

[Examples 14 to 27]
According to the descriptions in Tables 6 to 8, an adsorption heat sealing agent (AS) and a masterbatch (MB) were selected, and the same operation as in Example 13 was performed to form a gas adsorption barrier lid material, a gas adsorption bottom material, and a deodorizing PTP. A package was produced and evaluated in the same manner as in Example 13. The evaluation results are shown in Tables 11-13.

[Comparative example 1]
(Preparation of lid material)
A lid material was obtained by gravure coating only MP-3405, which is a heat sealing agent, onto an aluminum foil (20 μm thick).
(Preparation of bottom material)
LLDPE resin (Evolu SP2020, Prime Polymer Co., Ltd., MFR: 2.3 g/10 min, density: 0.916 g/cm ³ ) was formed into a film by inflation at 160°C to obtain a film for the sealant layer with a single layer structure and a thickness of 50 μm. Ta.
Next, the film for the sealant layer obtained above was subjected to dry lamination (drying temperature 70°C) via the PVC/PVDC sheet 1 for the base material layer and the DL adhesive 1 (coating amount 3.5 g/m ² ). By laminating them together, a bottom material having the following layer structure was obtained.
Base material layer (240 μm)/adhesive layer (3.5 g/m ² )/sealant layer [heat seal layer (50 μm)]

(Preparation of PTP package)
A concave accommodating portion was formed in the bottom material obtained above, and the lid material, the gravure coat layer, and the sealant layer were stacked so as to face each other, and heat-sealed to produce a PTP package.

(Various evaluations)
Regarding the bottom material, lid material, and PTP package obtained above, various evaluations were performed in the same manner as in Example 1.

[Comparative example 2]
(Preparation of lid material)
Adsorption heat sealing agent 9 (AS9) was gravure coated onto aluminum foil (20 μm thick) to form a hydrolysis-inhibiting coating layer to obtain a gas adsorption barrier lid material.

(Preparation of bottom material)
Masterbatches 6, 7, 8 (MB6, 7, 8) and LLDPE resin (Evolu SP2020, manufactured by Prime Polymer Co., Ltd., MFR 2.3 g/10 minutes, density: 0.916 g/cm ³ ) were mixed in the following manner. Dry blending was performed to obtain a mixture for the deodorizing layer.
Masterbatch 6 (MB6) 26.7 parts by mass Masterbatch 7 (MB7) 26.7 parts by mass Masterbatch 8 (MB8) 26.7 parts by mass Evolue SP2020 19.9 parts by mass Next, masterbatch 9 (MB9) and LLDPE resin (Evolu SP2020, manufactured by Prime Polymer Co., Ltd., MFR 2.3 g/10 min, density: 0.916 g/cm ³ ) was dry blended with the following formulation to obtain a mixture for the hydrolysis suppression layer. .
Masterbatch 9 (MB9) 90.0 parts by mass Evolue SP2020 10.0 parts by mass Then, the mixture for the deodorizing layer obtained above, the mixture for the hydrolysis suppression layer, and the LLDPE resin (Evolue SP2020, Prime Polymer Co., Ltd. ^.
Heat seal layer (10 μm) / Deodorant layer (30 μm) / Hydrolysis suppression layer (10 μm)
Next, the bottom material obtained above was laminated by dry lamination (drying temperature: 70°C) using PVC/PVDC sheet 1 for the base layer and DL adhesive 1 (coating amount: 3.5 g/m ² ). A bottom material having the following layer structure was obtained.
Base layer (240 μm) / Adhesive layer (3.5 g/m ² ) / Sealant layer [Heat seal layer (10 μm) / Deodorant layer (30 μm) / Hydrolysis suppression layer (10 μm)]

(Preparation of PTP package)
A concave accommodating portion was formed in the gas adsorption bottom material obtained above, and the lid material and the sealant layers were stacked facing each other and heat-sealed to produce a PTP package.

(Various evaluations)
Regarding the bottom material, lid material, and PTP package obtained above, various evaluations were performed in the same manner as in Example 1. The evaluation results are shown in Table 13.

<Result summary>
The gas adsorption bottom material and gas barrier lid material of the Examples of the present invention, and the PTP packaging body made from them, exhibit good film formability, bag formability, heat sealability, deodorizing effect, and relative humidity reduction effect. Ta.
On the other hand, Comparative Example 1, in which neither the deodorizing agent nor the hydrolysis inhibitor was contained in the lid material and the bottom material, showed insufficient deodorizing effect and relative humidity reduction effect.
In addition, in Comparative Example 2, the content of deodorant in the deodorizing layer of the bottom material and the content of hydrolysis inhibitor in the hydrolysis inhibiting layer of the bottom material are too high.
Since the results showed that the film forming properties of the gas adsorption barrier lid material and the gas adsorption bottom material, the bag forming properties of the PTP package, and the seal strength were poor, the subsequent evaluation was discontinued.

<Evaluation method>
[Film forming property]
The appearance of each film (gas barrier lid material, gas adsorption bottom material) was observed and sensory evaluated. The evaluation criteria are as follows.
○: Film can be formed without wrinkles or bumps on the film.
×: Many wrinkles and bumps appeared on the film, making it difficult to form the film.
[PTP packaging bag making properties]
○: A PTP packaging bag was easily produced.
×: A PTP packaging bag could not be easily produced, and many unfused portions and wrinkles occurred.

[Heat sealability]
Cut each of the gas barrier lid material and the gas adsorption bottom material into 10 cm x 10 cm pieces, overlap their respective sealant layer surfaces, and test a 1 cm x 10 cm area using a heat seal tester (manufactured by Tester Sangyo Co., Ltd.: TP-701-A). After heat-sealing, a sample was prepared in which the ends were not heat-sealed or bonded, and were divided into two.
This sample was cut into strips with a width of 15 mm, each bifurcated end was attached to a tensile tester, the tensile strength (N/15 mm) was measured, and pass/fail was determined.
(Heat sealing conditions)
Temperature: 160℃
Pressure: 1kgf/ ^cm2
Time: 1 second (tensile strength test conditions)
Test speed: 300mm/min Load range: 50N
(Pass/Fail Judgment Criteria)
○: 10N/15mm or more, passed.
×: less than 10N/15mm, failing.

[Deodorization, relative humidity change]
The gas barrier lid material and the gas adsorption bottom material were each cut to 20 x 20 cm, and the odor components whose concentration was adjusted with air with a relative humidity of 80% or more, as well as a temperature and humidity data logger (T & D Co., Ltd., TR- 72 wf) and 1,000 ml was placed in a gas sampling bag (IB-PET-PIR 12 μm/adhesive layer/ONy 15 μm/adhesive layer/LLDPE film 60 μm), and the change in odor after being left for 2 days was evaluated by sensory evaluation, and the change in relative humidity was measured by temperature and temperature. Measured using a humidity data logger. As odor components, acetaldehyde was adjusted to 200 ppm and acetic acid was adjusted to 30 ppm.
The evaluation criteria for odor sensory evaluation are as follows: 1 = No change in odor compared to the initial stage 2 = Slightly reduced odor from the initial stage 3 = Significantly reduced odor compared to the initial stage 4 = Not at all no smell

1 Deodorizing PTP package 2 Seal portion L Cross-sectional line 3 Gas adsorption barrier lid material 4 Gas barrier layer 5 Coated sealant layer 5a Deodorant coating layer 5b Hydrolysis suppression coating layer 5c Heat-sealable resin coating layer 10 Gas adsorption bottom material 11 Base Material layer 12 Adhesive layer 13 Sealant layer 13a Deodorant layer 13b Hydrolysis suppression layer 13c Heat-sealable resin layer 20 Chemical odor adsorbent-supporting inorganic porous material

Claims (5)

A deodorizing PTP packaging body consisting of a gas adsorption bottom material having a plurality of concave accommodating parts for accommodating contents, and a gas adsorption barrier lid material that closes the opening of the concave accommodating part,
The gas adsorption bottom material is a laminate having a base material layer and a sealant layer,
The sealant layer has one type selected from the group consisting of a deodorizing layer and a hydrolysis inhibiting layer, and is a layer closer to the recessed housing than the base layer,
The gas adsorption barrier lid material is a laminate having a gas barrier layer and a sealant coating layer,
The sealant coating layer has one type selected from the group consisting of a deodorizing coating layer and a hydrolysis inhibiting coating layer, and is a layer closer to the recessed housing than the gas barrier layer,
The deodorizing PTP package has one type selected from the group consisting of the deodorizing layer and the deodorizing coating layer, and one type selected from the group consisting of the hydrolysis inhibiting layer and the hydrolysis inhibiting coating layer. ,
The deodorizing layer and the deodorizing coating layer contain a deodorant and a polyolefin resin,
The deodorant is one or more selected from the group consisting of a chemical odor adsorbent, a hydrophobic zeolite with a SiO ₂ /Al ₂ O ₃ molar ratio of 30/1 to 10,000/1, and an odor-decomposable metal compound. Contains
The hydrolysis inhibiting layer and the hydrolysis inhibiting coating layer contain a hydrolysis inhibitor and a polyolefin resin ,
The hydrolysis inhibitor is a hygroscopic alkali metal compound or a hygroscopic alkaline earth metal compound selected from the group consisting of Li ₂ O, Na ₂ O, K ₂ O, MgO, BaO, LiCl, and LiOH. or two or more types, and a hydrophilic zeolite with a SiO ₂ /Al ₂ O ₃ molar ratio of 1/1 to 20/1,
The content of the deodorant in the deodorizing layer is 0.5% by mass to 15% by mass,
A deodorizing PTP package, characterized in that the content of the hydrolysis inhibitor in the hydrolysis inhibiting layer is 1% by mass to 50% by mass. The layer farthest from the base material layer of the sealant layer and/or the layer closest to the base material layer contains a polyolefin resin and does not contain the deodorant and the hydrolysis inhibitor,
The deodorizing PTP package according to claim 1. The polyolefin resin is LDPE and/or LLDPE with a density of 0.90 g/cm ³ or more and 0.94 g/cm ³ or less,
The deodorizing PTP package according to claim 1 or 2. The content of the deodorant in the deodorizing coating layer is 1% by mass to 60% by mass,
The content of the hydrolysis inhibitor in the hydrolysis-inhibiting coating layer is 1% by mass to 40% by mass,
The deodorizing PTP package according to any one of claims 1 to 3. The gas adsorption bottom material or the gas adsorption barrier lid material, which is used in the deodorizing PTP package according to any one of claims 1 to 4.

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