JP5917807B2 - Packaging materials - Google Patents

Description

The present invention relates to a packaging material, a container, and a press-through pack.
In the present specification, the term “aluminum foil” is used to include not only pure aluminum foil but also aluminum alloy foil.

Patent Document 1 describes “a laminated body for molding in which a polyamide-based resin layer stretched on one surface of an aluminum foil and a thermal adhesive layer on the other surface are laminated via an adhesive layer”.
Here, by forming the hot-water shrinkage rate of the polyamide-based resin layer substantially equal in the MD direction and the TD direction, when forming the molding laminate (packaging material) into a container, uneven wrinkles and cracks, Generation of delamination or the like is suppressed, and moldability is improved.

However, in the molding laminate described in Patent Document 1, no particular innovation has been made for the aluminum foil.
For this reason, when forming into a container having a large forming depth, there is a possibility that the aluminum foil may crack (crack), and development of a packaging material with improved formability has been awaited.

JP 2004-58515 A

Therefore, as a result of intensive studies, the present inventors have found that a larger container (having a larger molding depth) can be formed by improving the aluminum foil in the packaging material.
An object of the present invention is to provide a packaging material using an aluminum foil that is versatile and has excellent moldability with the same components as before, a container molded using the same, and a container and a lid material. Is to provide a press-through pack.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that an aluminum foil having specific physical properties is excellent in molding processability without requiring a special additive element. A packaging material laminated as a barrier layer was completed.

The packaging material of the present invention is a laminate of at least a polyamide resin film, an aluminum foil, and a thermal adhesive layer, and the aluminum foil contains 0.7 mass% or more and 1.7 mass% or less of iron, and has a thickness of 10 μm. The (100) plane with respect to the total diffraction intensity, which is 150 μm or less and is the sum of the diffraction intensities indicating the (111) plane, (100) plane, (110) plane, and (311) plane in X-ray diffraction. The ratio of the diffraction intensity indicating the (110) plane with respect to the total diffraction intensity is 15% or more and 40% or less.
The (111) plane, (100) plane, (110) plane, and (311) plane are mirror index representations of the crystal lattice plane of the aluminum foil.

  The polyamide-based resin film, the aluminum foil, and the thermal adhesive layer are preferably laminated via an adhesive. Further, an intermediate resin film may be interposed between the aluminum foil and the thermal adhesive layer. By molding these packaging materials, a container having a large molding depth without cracks can be produced by cold molding. Moreover, the press through pack which consists of the said container and a cover material can be provided.

  The packaging material of the present invention having the above characteristics has good moldability. Further, by molding the packaging material of the present invention, it is possible to obtain a container having a large molding depth or a container in which defects such as molding cracks are unlikely to occur. In addition, a press-through pack composed of the container and a lid material exhibits good barrier properties (moisture resistance and oxygen permeation resistance).

Sectional view showing an example of packaging material Sectional drawing which shows an example of a package Sectional drawing which shows the other example of a package Table showing examples and comparative examples Table showing examples and comparative examples Table showing examples and comparative examples Table showing examples and comparative examples

  Embodiments of the present invention will be described below.

<Basic configuration>
As shown in FIG. 1, the packaging material 1 of the embodiment is formed by laminating a polyamide-based resin film 2 as an exterior film, an aluminum foil 3, and a thermal adhesive layer 4 in this order via an adhesive layer 5. Has been.
Moreover, as shown in FIG. 2 and FIG. 3, the container 10 of the embodiment is formed as having a plurality of pockets 11 by processing the packaging material 1.
As shown in FIG. 2, a content A such as a medicine is stored in each pocket 11 of the container 10, and the lid 20 is heat-sealed to the surface of the container 10 on the side of the heat bonding layer 4, whereby a press-through pack (packaging body). Is formed.
Alternatively, as shown in FIG. 3, the package 20 may be formed by heat-sealing the surfaces of the pockets 11 of the pair of containers 10 on the thermal adhesive layer 4 side without using the lid 20.

<Polyamide resin film>
As the polyamide resin film 2 used for the packaging material 1 of the embodiment, a stretched polyamide resin is preferable, and a biaxially stretched polyamide resin film, particularly a simultaneous biaxially stretched polyamide resin film is suitable.
Hot water shrinkage (100 ° C. × 30 minutes) in the MD (long direction of the film; ie, the winding direction of the original film) and TD (width direction of the film; ie, the direction perpendicular to the winding direction of the original film) ) Ratio (MD / TD) is preferably 0.9 to 1.1, more preferably 0.95 to 1.05.
When the ratio is less than 0.9 or exceeds 1.1, non-uniform wrinkles occur when the container 10 and the lid 20 are thermally bonded as shown in FIG. 2, or the polyamide resin film 2 and the aluminum foil 3 or delamination tends to occur between the aluminum foil 3 and the thermal adhesive layer 4.
As for the thickness of the polyamide-type resin film 2, about 10-50 micrometers is preferable, and a favorable moldability, moderate toughness, and a protective function can be obtained within this range.
The hot water shrinkage rate (%) is based on JIS K6782, but the heating temperature is 100 ° C., the heating time is 30 minutes, and the heating medium is water.

  As the polyamide resin film 2, a so-called nylon film can be suitably used, but nylon 6, nylon 66, nylon 11, nylon 12, MXD-6, other nylon copolymers and nylon blend resins can be used. A film may be used. In addition, a multilayer film in which a polyester resin or an ethylene vinyl alcohol (EVOH) resin is coextruded based on nylon can also be used.

<Aluminum foil>
The aluminum foil 3 used for the packaging material of the embodiment includes 0.7% by mass or more and 1.7% by mass or less of iron (Fe). The Fe content is preferably 0.95% by mass to 1.7% by mass, and more preferably 1.1% by mass to 1.7% by mass.
In order to refine the aluminum crystal grains, suppress the generation of coarse intermetallic compounds, and ensure appropriate strength and elongation, the Fe content ranges from 0.7% by mass to 1.7% by mass. Is particularly suitable.
If the Fe content is less than 0.7% by mass, the effect of refining aluminum crystal grains is insufficient, the strength of the foil is not sufficient, and relatively many pinholes tend to occur after cold rolling. It is. On the other hand, if the Fe content exceeds 1.7% by mass, coarse intermetallic compounds are likely to be generated, workability (rollability, formability) is inferior, and pinholes are also likely to occur. .
In the aluminum foil 3, the content of silicon (Si) is preferably 0.30% by mass or less, more preferably 0.15% by mass or less.
When the Si content exceeds 0.30% by mass, coarse crystallized products are likely to be generated, and the effect of refining aluminum crystal grains tends to decrease, and the strength and workability tend to decrease. is there. Since Si inevitably exists in industrial aluminum, the lower limit value of the Si content may be 0.01% by mass.
In the aluminum foil 3, the content of copper (Cu) is preferably 0.05% by mass or less, more preferably 0.02% by mass or less.
This is because if the Cu content exceeds 0.05% by mass, the workability and corrosion resistance may decrease. In addition, since Cu inevitably exists in industrial aluminum, the lower limit value of the Cu content may be 0.001% by mass.
In the aluminum foil 3, the balance other than the above elements is aluminum (Al). Here, the aluminum foil 3 may contain 0.05% by mass or less of trace elements other than the above-described Fe, Si, and Cu. Examples of the trace element include manganese (Mn), magnesium (Mg), zinc (Zn), titanium (Ti), zirconium (Zr), gallium (Ga), chromium (Cr), vanadium (V), and the like. These elements may exist in trace amounts in the aluminum as inevitable impurity elements.

As mentioned above, although the composition of the aluminum foil 3 used for the packaging material 1 of the embodiment has been described, the composition of the aluminum foil 3 is, for example, an alloy number 8021 defined in JIS H 4160-1994, which is commercially available. Alternatively, a composition corresponding to 8079 is preferable.
Therefore, the aluminum foil 3 is a general-purpose aluminum foil that does not require an expensive additive element and has a composition close to 8000 or 8000, and is excellent in moldability.

The thickness of the aluminum foil 3 is 10 μm or more and 150 μm or less, preferably 20 μm or more and 80 μm or less. Within these ranges, the moisture resistance, light-shielding property, and shape-retaining property of the container can be maintained without impairing moldability.
If the thickness of the aluminum foil 3 is less than 10 μm, the aluminum foil 3 may be broken during molding or a pinhole may be generated (or enlarged). Further, if the thickness of the aluminum foil 3 exceeds 150 μm, it is difficult not only to obtain an X-ray diffraction intensity ratio in the range specified in the present invention, but also when the container 10 is molded, the weight increases, and the molding pressure Rises.

In the X-ray diffraction of the aluminum foil 3, the (100) plane with respect to the total diffraction intensity, which is the sum of the diffraction intensities indicating the (111) plane, (100) plane, (110) plane, and (311) plane, respectively. The ratio of the diffraction intensity showing is 30% or more and 50% or less. The ratio of the diffraction intensity indicating the (110) plane to the total diffraction intensity is 15% or more and 40% or less.
By limiting the ratio of the diffraction intensity indicating the (100) plane and the ratio of the diffraction intensity indicating the (110) plane within the above range, excellent moldability can be obtained.
The ratio (P ₁₀₀ ) of diffraction intensity indicating the (100) plane in X-ray diffraction is the (111) plane, (100) plane, (110) plane, and (311) on the diffraction chart in the X-ray diffractometer. Each diffraction intensity indicating each of the surfaces is measured as an integrated intensity after removing the background (BG), and is calculated by the following (Equation 1) as a ratio to the total diffraction intensity, which is the sum of the above diffraction intensity. . The actual integral intensity is measured by reading using an integral intensity calculation program that is analysis software of the X-ray diffractometer used. Further, the background removal of the X-ray diffraction intensity is performed using the manual method in the above-described integrated intensity calculation program.
P ₁₀₀ = [{Diffraction intensity of (100) plane} / {Total of diffraction intensities of (111) plane, (100) plane, (110) plane, and (311) plane}) × 100 [%] ·・ ・ (Formula 1)
The ratio (P ₁₁₀ ) of diffraction intensity indicating the (110) plane in X-ray diffraction can be obtained in the same manner. That is, the numerator in the above formula may be replaced with “(110) plane diffraction intensity”. In addition, the surface which measures X-ray diffraction intensity is a rolling surface of the aluminum foil 3, ie, a surface which contacts a rolling roll at the time of cold rolling at the time of manufacturing the aluminum foil 3.

In the diffraction intensity detected by X-ray diffraction, the present inventors have a ratio of the diffraction intensity showing the (100) plane to 30% or more and 50% or less with respect to the total diffraction intensity, and (110) It has been found that if the ratio of the diffraction intensity showing the surface is within the range of 15% or more and 40% or less, the moldability of the aluminum foil and the packaging material using the aluminum foil is excellent.
This is considered to be because when the ratio of the diffraction intensities indicating the (100) plane and the (110) plane is out of the above range, the balance of the crystal orientations deteriorates, resulting in a decrease in formability.

And in order to make each ratio of the diffraction intensity which shows (100) plane and (110) plane fall in a predetermined range, although it does not restrict | limit, it homogenizes the ingot of the composition of said aluminum foil 3. When performing the heat treatment, the homogenization heat treatment may be performed at a temperature (for example, 570 ° C. to 630 ° C.) higher than a conventionally performed temperature (about 500 to 540 ° C.). The working conditions of the plate making process (hot rolling, cold rolling, intermediate annealing) and the working conditions of the foil making process (cold rolling) may be set to general conditions.
The aluminum foil 3 having a thickness of 10 to 150 μm thus obtained is finally annealed, whereby the aluminum foil 3 having high formability can be stably produced.
By using the aluminum foil 3, the moldability in the packaging material 1 of the embodiment can be improved.

Although the manufacturing method of this aluminum foil 3 is not specifically limited, It is preferable to use the rolling method currently implemented industrially. For example, a slab having a predetermined component obtained by a semi-continuous casting method is subjected to a homogenization heat treatment (also referred to as soaking), followed by steps of hot rolling, intermediate annealing, cold rolling, and final annealing, and then the aluminum foil 3 Can be obtained.
Here, the homogenization heat treatment is preferably performed at 570 ° C. or higher, and more preferably at 600 ° C. or higher. By doing in this way, it becomes easy to obtain the aluminum foil 3 which has the appropriate X-ray diffraction intensity ratio prescribed | regulated by this invention.
The homogenization heat treatment time may be appropriately determined according to the size of the slab and the performance of the heat treatment furnace, but it is usually 1 hour to 20 hours, preferably about 2 to 10 hours. Following the homogenization heat treatment, hot rolling may be performed at a temperature of 400 ° C. to 500 ° C., and after cooling to near room temperature, cold rolling may be performed until a predetermined thickness is reached. You may implement intermediate annealing (300-400 degreeC) in the middle of cold rolling as needed. After the cold rolling is completed, it is preferable to perform final annealing at about 250 to 450 ° C. Each heat treatment time may be appropriately determined depending on the capacity of the furnace and the amount and size of the product (or sample), but is usually several hours to several tens of hours, for example, 1 to 72 hours. In addition, although a hot rolling process is required at the time of industrial mass production, a hot rolling process is not necessarily required in laboratory-based experiments and trial manufacture.

By interposing the aluminum foil 3 as described above, the moisture resistance and light shielding properties of the container 10 formed from the packaging material 1 are improved, and the container 10 can be stored for a long period of time at room temperature. And shape retention can be improved.

<Thermal bonding layer>
Examples of the thermal adhesive layer 4 include high density polyethylene, medium density polyethylene, low density polyethylene, linear linear polyethylene, saturated polyester, linear saturated polyester, unstretched polypropylene (CPP), chlorinated polypropylene, EAA (ethylene-acrylic acid). Copolymer), EMAA (ethylene-methacrylic acid copolymer), EEA (ethylene-ethyl acrylate copolymer), EMAC (ethylene-methyl acrylate copolymer), ionomer, bondine (ethylene / ethyl acrylate / maleic anhydride) Acid ternary copolymer: manufactured by Sumitomo Chemical Co., Ltd.), Mersen M (polyolefin adhesive resin: manufactured by Tosoh Corporation), carboxylic acid modified polyethylene, carboxylic acid modified polypropylene, carboxylic acid modified EVA, vinyl chloride, polystyrene, etc. Choose from That at least one can be employed, in particular cast polypropylene Among these, the adoption of vinyl chloride are preferred.
The thickness of the thermal bonding layer 4 is preferably about 20 to 100 μm, more preferably 40 to 80 μm.
In addition, although the heat-sealing conditions of the container 10 are suitably selected according to the resin and film to be used, it is usually about 0.1 to 3 seconds at 140 to 260 ° C. In addition, a ring seal (also referred to as a line seal) in which the cross-sectional shape after sealing is a concave shape, or a mesh seal in which the cross-sectional shape after sealing is continuous (a jagged shape) may be applied.

In addition to the polyamide-based resin film 2, the aluminum foil 3, and the thermal bonding layer 4, an intermediate resin film or the like may be further interposed as necessary. As the intermediate resin film, a polyethylene film, a polyester film, a vinyl chloride film, a nylon film, a polypropylene film, or the like can be used as necessary. In particular, when a nylon film having a thickness of 10 to 50 μm is employed as the intermediate resin film, the moldability of the packaging material can be improved.
Further, an arbitrary layer may be provided with an anchor coat layer, a printing / coloring layer, a primer layer, an overcoat layer or the like as required.

<Adhesive layer>
It is desirable to interpose the adhesive layer 5 by using a reactive adhesive for bonding between the layers 2, 3 and 4.
As the main agent of the adhesive constituting the adhesive layer 5, it is preferable to use an adhesive such as polyester or polyester urethane, and the coating amount is about 0.5 to 10.0 g / m ² .
If it is less than 0.5 g / m ² , the adhesive strength may be insufficient, but if it exceeds 10.0 g / m ² , no further improvement in adhesive strength is observed, which is undesirable in terms of moisture resistance and economy. Because. Moreover, aliphatic or aromatic isocyanate can be used as a hardening | curing agent.
In particular, in the packaging material 1 of the embodiment, a heat-reactive polyester polyol adhesive composed of two or more liquids, having a weight average molecular weight of 30,000 or more and a softening point after coating film curing of 180 ° C. or more. Most preferred. The adhesion method is not particularly limited, but is preferably a dry lamination method.
Further, when a special interfacial adhesive force is required between the aluminum foil and the adhesive, it is effective to use a wash primer.

<Molding>
The method of forming the pocket 11 for storing the contents A into the packaging material 1 is not particularly limited, but for example, by using a press machine, stretch forming, deep drawing, vacuum forming without using a press, pressure forming, etc. Molding may be performed cold or warm, but it is usually preferable to perform molding in cold. Moreover, it is good also as a cold and warm combined use system.

<Lid>
When the lid 20 is used as shown in FIG. 2, a known lid material can be employed, for example, OP varnish (1.5 g / m ² ) / printing layer / aluminum foil (20 μm hard material) / polypropylene. A lid material including an aluminum foil such as a system coat (3.5 g / m ² ) can be used.

  Hereinafter, the features of the present invention will be further clarified by giving examples and comparative examples.

<Evaluation of aluminum foil>
First, as will be described below, samples of aluminum foil used in Examples of the present invention and Comparative Examples were prepared.
Using the alloys A to F shown in FIG. 4, samples of the aluminum foils of the example samples 1 to 13 and the comparative example samples 1 to 6 shown in FIG. 6 were prepared according to the manufacturing steps A to J shown in FIG. 5. .
In FIG. 4, “other element meter” indicates the total content of inevitable impurity elements (B, Bi, Pb, Na, etc.) other than the elements specified by JIS.

As shown in FIG. 5, in the manufacturing processes A to F, the ingot of aluminum alloy obtained by DC casting was subjected to homogenization heat treatment at a predetermined temperature and time in a heating furnace. Then, without performing hot rolling, cold rolling was performed a plurality of times, intermediate annealing was performed at a predetermined temperature and time during the cold rolling, and cold rolling was performed until the thickness reached 50 μm. Further, by performing final annealing at a predetermined temperature and time, an aluminum foil sample having a thickness of 50 μm was produced as shown in FIG. In addition, in manufacturing process AF, process 1, 3-6 other than the manufacturing process of an ingot was performed with research equipment.
Moreover, as shown in FIG. 5, in the manufacturing processes GJ, the ingot of the aluminum alloy obtained by DC casting was subjected to homogenization heat treatment at a predetermined temperature and time in a heating furnace. Thereafter, hot rolling was performed at a starting temperature of 480 ° C. until the thickness became about 6.5 mm. Using the obtained hot rolled material, cold rolling is performed a plurality of times, intermediate annealing is performed at a predetermined temperature and time during the cold rolling, and cold rolling is performed until the thickness reaches a predetermined value. It was.

  Furthermore, by performing final annealing at a predetermined temperature and time, a sample of an aluminum foil having a thickness shown in FIG. 6 was produced. In addition, in manufacturing process GJ, not only the ingot manufacturing process but all the processes 1-6 were performed with the mass production machine. Further, in the manufacturing processes G to J, since the homogenization heat treatment temperature is high, if the ingot temperature reaches the homogenization heat treatment temperature, then the ingot is cooled to a temperature at which hot rolling can be started. Also good. Furthermore, the homogenization heat treatment time may be within a general processing time, and is not limited to the time shown in FIG. Since the intermediate annealing conditions do not have a great influence on the characteristics of the present invention, they are not limited to the temperature and time shown in FIG. 5 and may be within the range of general operating conditions.

For each sample of the obtained aluminum foil, the X-ray diffraction intensity was measured in order to calculate the ratio of the diffraction intensity indicating the (100) plane and the ratio of the diffraction intensity indicating the (110) plane. In addition, the Erichsen value was measured in order to preliminarily evaluate the formability of each aluminum foil sample. The tensile strength, proof stress and elongation were also measured for each sample of aluminum foil.
The X-ray diffraction intensity is measured by using an X-ray diffractometer manufactured by Rigaku Corporation (type: RINT-2000) under the conditions of CuKα ray, 40 kV, 40 mA, and (111) The measurement was performed by measuring the X-ray diffraction intensity (integrated intensity after background removal) of the plane, (100) plane, (110) plane, and (311) plane. Using the value of the X-ray diffraction intensity of each surface obtained, the relative diffraction intensity ratio was calculated by the above (Equation 1).
The Eriksen test was conducted according to JIS Z 2247-2006 using an electric Erichsen coating film testing machine (516-M) manufactured by Yasuda Seiki Seisakusho. The Eriksen value measured by the Eriksen test was rounded to the first decimal place in accordance with JIS Z 8401-1999. However, spray type high grease (manufactured by Taiho Kozai Co., Ltd.) was used as the grease to be applied to the aluminum foil sample during the test, and the grease was applied only to the surface (one side) of the aluminum foil with which the test punch contacted.
The tensile strength, proof stress and elongation were measured using a tensile tester (Toyo Seiki Strograph VE50D, strain rate 20 mm / min, sample width 15 mm, distance between chucks 100 mm).

The above measurement results are shown in FIG. The underlined value in FIG. 6 indicates that the diffraction intensity ratio is outside the range of the aluminum foil used in the present invention. For samples prepared using Alloy A and Alloy B (Samples 1 to 8 for Examples), the Erichsen value of the sample prepared using the ingot homogenized at the lowest temperature was used as a reference. The increase / decrease rate of Eriksen values is shown for reference.
From the results shown in FIG. 6, it can be seen that the aluminum foil for Example shows a high Erichsen value by limiting the diffraction intensity ratio within the range of the present invention. Moreover, in the samples 9-12 for an Example, it turns out that the aluminum foil of various thickness within the range of 15-150 micrometers shows a high Erichsen value by limiting a diffraction intensity ratio in the range of this invention.

<Evaluation of packaging materials>
The packaging materials of Examples and Comparative Examples were prepared using the aluminum foils of Samples 10 and 13 for Examples and Sample 6 for Comparative Examples.
One side of the aluminum foil is laminated with a 25 μm-thick nylon film (“BONYL RX” manufactured by Kojin Co., Ltd.) using a polyurethane dry laminate adhesive (weight 3 g / m ² after drying), and the other side of the aluminum foil A polyvinyl chloride sealant film having a thickness of 60 μm was laminated using a polyurethane dry laminate adhesive (weight after drying: 3 g / m ² ) to produce packaging materials of Examples 10 and 13 and Comparative Example 6.
The moldability of each produced packaging material was evaluated by a moldability evaluation apparatus “Mad Tester”.
An outline of the mud tester is described in JP-A-63-222263.
It consists of an upper mold having a plurality (9 places) of circular receiving holes (φ20 mm) and a lower mold having a circular hole corresponding to the circular receiving holes, and the tip of the lower mold has a hemispherical shape (r = 10 mm) plugs (total of 9 plugs of different lengths. The tip of each plug is covered with Teflon) is inserted in a slidable state in the length direction, and the other end of the plug is connected to the base. The base can be slid by a cylinder / piston mechanism (pneumatic pressure source), the packaging material is sandwiched between the upper mold and the lower mold (the thermal adhesive layer is on the plug side), and the cylinder / piston mechanism is operated. Thus, the tip of the plug was protruded from the lower mold into the upper circular receiving hole to form a substantially hemispherical recess in the packaging material. The plug moving speed at this time was about 10 mm / second, and the molding pressure per section of the plug was about 28.5 MPa. The length of the (9) plugs is changed by 1 mm so that the molding depth is 6 to 14 mm, and the maximum molding depth at which no cracks occurred in the aluminum foil in the packaging material is the maximum molding. The depth. The size of the specimen per one time (one sheet) was 100 mm × 100 mm, and each packaging material was measured at n = 20.
FIG. 7 shows an average value of the maximum forming depth (n = 20).

  From the above results, the packaging material of the present invention is excellent in formability by adopting a specific aluminum foil, can provide a larger molded container, and has a barrier property because it is relatively difficult to crack. It turns out that it is excellent also in (moisture permeability resistance and oxygen permeability resistance).

  It should be considered that the embodiments and examples disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is shown not by the above embodiments and examples but by the scope of claims, and is intended to include all modifications and variations within the meaning and scope equivalent to the scope of claims. .

  The container manufactured by molding and processing the packaging material of the present invention can be used for storing or packaging food, medicine, etc., and also used for a battery pack for storing an electrolyte and a current collector. You can also.

1 Packaging Material 2 Polyamide Resin Film 3 Aluminum Foil 4 Thermal Adhesive Layer 5 Adhesive Layer 10 Container 11 Pocket 20 Lid A Contents

Claims (6)

A packaging material in which at least a polyamide resin film, an aluminum foil, and a thermal adhesive layer are laminated,
The aluminum foil
Iron is included in an amount of 1.1 mass% or more and 1.7 mass% or less, and the manganese content is 0.01 mass% or less.
The thickness is 20 μm or more and 150 μm or less,
Ratio of diffraction intensity indicating (100) plane to total diffraction intensity, which is the sum of diffraction intensity indicating each of (111) plane, (100) plane, (110) plane, and (311) plane in X-ray diffraction 30% to 50%, and the ratio of the diffraction intensity showing the (110) plane to the total diffraction intensity is 15% to 40%.   The packaging material of Claim 1 which made content of copper of aluminum foil 0.001 mass%-0.05 mass%. The packaging material according to claim 1, wherein the polyamide-based resin film, the aluminum foil, and the thermal adhesive layer are laminated via an adhesive .   The packaging material according to claim 1, wherein an intermediate resin film is interposed between the aluminum foil and the thermal adhesive layer. A container in which the packaging material according to claim 1 is molded .   A press-through pack comprising the container according to claim 5 and a lid.

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