JP2016141443A - Film for package and method for producing the same, and package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film for packages which can reduce foreign odor while keeping the original odor of contents.SOLUTION: A film for packages includes a barrier material 20 and a sealant material 30 provided on one surface of the barrier material 20, and the sealant material 30 has a heat seal layer 36 and a zeolite-containing layer 34 containing a hydrophilic zeolite and a hydrophobic zeolite and has the zeolite-containing layer 34 and the heat seal layer 36 arranged therein sequentially from the side of the barrier material 20. In the hydrophobic zeolite, a molar ratio represented by SiO/AlOis 50 to 80. In the hydrophilic zeolite and the hydrophobic zeolite, a mass ratio represented by hydrophilic zeolite/hydrophobic zeolite is 2/8 to 7/3, a thickness of the zeolite-containing layer 34 is 15 μm or more, and the film is subjected to heat treatment at 30 to 60°C for 5 hours or more.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a film for a packaging body, a method for producing the same, and a packaging body.

In recent years, opportunities to drink coffee and tea in daily life such as after meals and between meals have increased.
Coffee and tea are favored by many people not only for their taste but also for their aroma (odor). In particular, a coffee-specific odor is strongly felt from the coffee beans immediately after roasting and the ground product obtained by grinding the coffee beans. The odor peculiar to coffee (original odor of coffee) includes fragrance components that are said to be hundreds of types. And these fragrance components balance out the original odor of coffee.

  The roasted coffee beans or a ground product obtained by grinding the coffee beans are usually encapsulated and stored in a plastic film package as described in Patent Document 1 and Patent Document 2, for example.

JP-A-8-258873 JP-A-10-1181

The coffee beans stored as described above or a pulverized product obtained by grinding the coffee beans are oxidized during storage to produce oxides and the like. When this oxide etc. increase, the off-flavor component originating in the said oxide etc. will increase, and it will come to feel a bad odor (off-flavor) gradually. Furthermore, when the off-flavor component increases, the balance of the aroma component is lost, and the original odor of coffee becomes difficult to feel. The original odor of coffee is also lost by permeating the package during storage.
When the original odor of coffee is no longer felt, or when an odor (off-flavor) is felt, the product value may be reduced, and the product value may become a complaint.

  This invention is made | formed in view of the said situation, and it aims at the film for packaging bodies which can maintain the original odor of the content and can reduce a bad odor.

As a result of intensive studies, the present inventors have found that the following laminate can solve the above problems.
That is, the film for packaging bodies of this invention has the following structures.
[1] A barrier material and a sealant material provided on one surface of the barrier material,
The sealant material includes a heat seal layer and a zeolite-containing layer containing hydrophilic zeolite and hydrophobic zeolite, and the zeolite-containing layer and the heat seal layer are arranged in order from the barrier material side. Become
The hydrophobic zeolite has a molar ratio represented by SiO ₂ / Al ₂ O ₃ of 50 to 80,
The hydrophilic zeolite and the hydrophobic zeolite have a mass ratio represented by hydrophilic zeolite / hydrophobic zeolite of 2/8 to 7/3,
The zeolite-containing layer has a thickness of 15 μm or more,
A film for packaging, which has been heat-treated at 30 to 60 ° C. for 5 hours or more.
[2] The film for a packaging body according to [1], wherein the barrier material is a metal foil or a metal vapor deposition film.
[3] The packaging film according to [1] or [2], which is used for packaging roasted coffee beans or a pulverized body thereof.
[4] A package comprising the packaging film according to any one of [1] to [3].
[5] A method for producing a film for a package according to [1], wherein a barrier material, a step of producing a laminated film by laminating a sealant material on one surface of the barrier material, and the laminated film And a step of heating at 30 to 60 ° C. for 5 hours or more.

  According to the film for a packaging body of the present invention, the original odor of the contents can be maintained and the off-flavor can be reduced.

It is sectional drawing of the laminated body concerning 1st embodiment of this invention. It is sectional drawing of the laminated body concerning 2nd embodiment of this invention.

The film for a packaging body of the present invention includes a barrier material and a sealant material provided on one surface of the barrier material.
Hereinafter, the film for packaging body of the present invention will be described with reference to embodiments.

(First embodiment)
The film for packaging bodies according to the first embodiment of the present invention will be described with reference to the drawings.
The packaging film 1 in FIG. 1 is obtained by laminating a base material 10, a barrier material 20, and a sealant material 30 in this order. That is, the packaging film 1 includes a barrier material 20 and a sealant material 30 provided on one surface of the barrier material 20.
Although the thickness of the film 1 for packaging bodies is not specifically limited, For example, 40-250 micrometers is preferable, 50-200 micrometers is more preferable, 60-150 micrometers is further more preferable. If it is less than the said lower limit, there exists a possibility that the intensity | strength of the film 1 for packaging bodies may fall, and when it exceeds the said upper limit, the softness | flexibility of the film 1 for packaging bodies may fall and handling may become complicated.

<Base material>
As for the base material 10, resin-made films, paper, these laminated bodies, etc. are mentioned.
Resin films include polyolefins such as polyethylene terephthalate (PET) such as biaxially stretched polyethylene terephthalate, biaxially stretched polypropylene (OPP), unstretched polypropylene (CPP), high density polyethylene (HDPE), and medium density polyethylene (MDPE). And polyamide (PA) such as biaxially stretched nylon, and laminates thereof. Among these, PET, polypropylene (PP), and PA are preferable, and biaxially stretched PET, OPP, and PA are more preferable.
As a laminated body, the laminated body of the said resin films is mentioned.
The base material 10 may be printed on the surface or between the layers.

  The thickness of the base material 10 is determined in consideration of a material, a structure, etc., for example, 5-100 micrometers is preferable and 10-50 micrometers is more preferable. If it is less than the said lower limit, the intensity | strength of the film 1 for packaging bodies may fall, and when it exceeds the said upper limit, the softness | flexibility of the film 1 for packaging bodies may be impaired and handling may become complicated.

<Barrier material>
The barrier material 20 has a water vapor barrier property and a gas barrier property. That is, the barrier material in the present invention has a role of suppressing water vapor transmission and odor transmission.
Examples of the barrier material 20 include a barrier material capable of suppressing the transmission of water vapor and odor, and a laminate of a barrier material capable of suppressing the transmission of water vapor and a barrier material capable of suppressing the transmission of odor.
Moreover, you may use the laminated body of the barrier material which can suppress permeation | transmission of water vapor | steam, and permeation | transmission of odor, and the barrier material which can suppress permeation | transmission of water vapor | steam, or the barrier material which can suppress permeation | transmission of odor.
Examples of the barrier material that can suppress the permeation of water vapor and the transmission of odor include metal foils such as aluminum foil and copper foil, metal vapor deposited films on which a metal such as aluminum is deposited, silica deposited films on which silica is deposited, and the like.
Examples of the barrier material that can suppress the permeation of water vapor include polyvinylidene chloride (PVDC) and OPP.
Examples of the barrier material that can suppress the transmission of odor include ethylene-vinyl alcohol polymer (EVOH), PA, polyacrylonitrile (PAN), and the like.

Water vapor permeability of the barrier material 20 is preferably 3g ^/ (m 2 · 24h) or ^{less, 1g / (m 2 · 24h} ) or less is more preferable. If it is below the above upper limit, the original odor of the contents is easily maintained, and the off-flavor is easily reduced. The water vapor transmission rate is determined by the Mocon method of JIS K7129 (2008).
The gas permeability of the barrier material 20 is preferably 5 cm ³ / (m ² · atm · 24 h) [= 4.93 cm ³ / (m ² · MPa · 24 h)] or less, preferably 1 cm ³ / (m ² · atm · 24 h. ) [= 0.987 cm ³ / (m ² · MPa · 24 h)] or less. If it is below the said upper limit, the original odor of the contents will be easily maintained. The gas permeability is determined by the kon K 7126 mocon method.

The thickness of the barrier material 20 is determined in consideration of the material and configuration. When using metal foil and a metal vapor deposition film as the barrier material 20, the thickness of the barrier material 20 is preferably 6 to 20 μm, and more preferably 7 to 12 μm, for example. If it is less than the said lower limit, there exists a possibility that water vapor | steam barrier property and odor barrier property may fall, and when it exceeds the said upper limit, the softness | flexibility of the film 1 for packaging bodies may be impaired, and handling may become complicated.
When a resin film is used as the barrier material 20, the thickness of the barrier material 20 is preferably, for example, 10 to 30 μm, and more preferably 12 to 15 μm. If it is less than the said lower limit, there exists a possibility that water vapor | steam barrier property and odor barrier property may fall, and when it exceeds the said upper limit, the softness | flexibility of the film 1 for packaging bodies may be impaired, and handling may become complicated.

<Sealant material>
The sealant material 30 is a laminate in which a laminate layer 32, a zeolite-containing layer 34, and a heat seal layer 36 are arranged in order from the barrier material 20 side.

≪Laminate layer≫
The laminate layer 32 mainly has a role of improving the adhesion between the sealant material 30 and the barrier material 20.
Examples of the resin constituting the laminate layer 32 include polyolefins such as low density polyethylene (LDPE), linear LDPE (LLDPE), MDPE, HDPE, PP, EVOH, ethylene-vinyl acetate copolymer (EVA), ethylene- Examples thereof include acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-ethyl acrylate copolymer (EEA), and ionomer. These resins may be used alone or in combination of two or more.

  5-50 micrometers is preferable and, as for the thickness of the laminate layer 32, 10-20 micrometers is more preferable. If it is less than the said lower limit, there exists a possibility that the adhesive strength of the sealant material 30 with respect to the barrier material 20 may fall, and when it exceeds the said upper limit, the film 1 for packaging bodies may become too thick, and there exists a possibility that a softness | flexibility may be impaired.

≪Zeolite-containing layer≫
The zeolite-containing layer 34 is a resin film containing hydrophilic zeolite and hydrophobic zeolite.
Examples of the resin constituting the zeolite-containing layer 34 include the same resins as those constituting the laminate layer 32.

  The zeolite contained in the zeolite-containing layer 34 is a hydrophilic zeolite or a hydrophobic zeolite. By containing the hydrophilic zeolite and the hydrophobic zeolite, the zeolite-containing layer 34 adsorbs a bad odor generated from the contents and can maintain the original odor of the contents satisfactorily.

The hydrophilic zeolite has a molar ratio represented by SiO ₂ / Al ₂ O ₃ (hereinafter, sometimes referred to as SiO ₂ / Al ₂ O ₃ ratio) of less than 5. _SiO 2 / _Al 2 _{O 3} ratio of hydrophilic zeolite is preferably from 1 to 4.9, 1 to 3 is more preferable. The lower limit is the lowest theoretical SiO ₂ / Al ₂ O ₃ ratio in zeolite. If it is below the said upper limit, it will become easy to maintain the original odor of the contents.

Although the salt which comprises a hydrophilic zeolite is not specifically limited, Na ion, K ion, Ca ion, Mg ion etc. are mentioned, From the point which is easy to maintain the original odor of the content, especially Na ion and Ca ion Is preferred.
The amount of crystal water in the hydrophilic zeolite (crystal water amount) is preferably 150 mol or more, more preferably 200 mol or more, per mol of the hydrophilic zeolite. If it is more than the said lower limit, it will become easy to maintain the original odor of the contents.
Examples of the hydrophilic zeolite include molecular sieve (trade name, manufactured by Union Showa Co., Ltd.), zeolum (trade name, manufactured by Tosoh Corporation), and the like.

Although the average particle diameter of hydrophilic zeolite is not specifically limited, For example, 5-50 micrometers is preferable, 5-30 micrometers is more preferable, 5-20 micrometers is more preferable, 10-20 micrometers is especially preferable. If it is less than the above lower limit, when the zeolite-containing layer 34 is provided, the hydrophilic zeolite is likely to be secondary agglomerated to easily increase the particle diameter, and the secondary agglomerated particles break the zeolite-containing layer 34 and the zeolite-containing layer 34 There exists a possibility that the effect which provided 34 may fall. If the above upper limit is exceeded, the particle diameter of the hydrophilic zeolite is too large, and the hydrophilic zeolite may damage the zeolite-containing layer 34, so that the effect of providing the zeolite-containing layer 34 may be reduced.
The average particle diameter of the hydrophilic zeolite is a volume standard median diameter measured by a laser diffraction method.

The hydrophobic zeolite has a molar ratio represented by SiO ₂ / Al ₂ O ₃ of 5 or more.
In the present invention, a hydrophobic zeolite having a SiO ₂ / Al ₂ O ₃ ratio of 50 to 80 is used. By using such a hydrophobic zeolite, it is possible to selectively adsorb a bad odor produced from the contents.

The salt constituting the hydrophobic zeolite is the same as the salt constituting the hydrophilic zeolite.
The amount of crystal water in the hydrophobic zeolite (crystal water amount) is preferably 350 mol or less, more preferably 300 mol or less, per mol of the hydrophobic zeolite.
Examples of the hydrophobic zeolite include hydrophobic molecular sieve (trade name, manufactured by Union Showa Co., Ltd.), high silica zeolite (trade name, manufactured by Tosoh Corporation), and the like.

  Although the average particle diameter of hydrophobic zeolite is not specifically limited, For example, 1-50 micrometers is preferable, 1-30 micrometers is more preferable, 2-20 micrometers is more preferable, 3-10 micrometers is especially preferable. When the average particle diameter of the hydrophobic zeolite is within the above-mentioned preferable range, the hydrophobic zeolite can sufficiently act against a bad odor without causing secondary aggregation or the like, and the adsorbability of the bad odor tends to be improved.

  In the zeolite-containing layer 34, the total amount (zeolite content) of the hydrophilic zeolite and the hydrophobic zeolite is preferably 10 to 70% by mass, and more preferably 25 to 50% by mass. If the total zeolite content is equal to or more than the above lower limit value, it becomes easier to enhance the adsorptivity of a strange odor and maintain the original odor of the contents. If the total zeolite content is not more than the above upper limit value, the zeolite-containing layer can be easily formed without defects.

  The mass ratio represented by hydrophilic zeolite / hydrophobic zeolite (hereinafter sometimes referred to as “hydrophilic / hydrophobic ratio”) is preferably 2/8 to 7/3, and more preferably 3/7 to 5/5. When the hydrophilic / hydrophobic ratio is within the above range, the selective adsorption of off-flavors is enhanced and it becomes easy to maintain the original odor of the contents. When the mass ratio represented by hydrophilic zeolite / hydrophobic zeolite is less than 2/8, the selective adsorption of off-flavors cannot be sufficiently obtained, and part of the original odor of the contents is adsorbed, The balance is lost, making it difficult to feel the original odor of coffee.

  The thickness of the zeolite containing layer 34 is 15 μm or more, preferably 15 to 100 μm, more preferably 20 to 80 μm, and still more preferably 40 to 60 μm. When the content is within the above preferable range, the adsorptivity of off-flavors is enhanced and the original odor of the contents is easily maintained. If the thickness of the zeolite-containing layer 34 is less than 15 μm, the adsorptivity of a strange odor cannot be sufficiently obtained.

≪Heat seal layer≫
The heat seal layer enhances the sealing property of the packaging film.
As the heat seal layer 36, the same layer as the laminate layer 32 may be used. Among these, LDPE, LLDPE, MDPE, and HDPE are preferable, and LDPE and LLDPE are more preferable.
The heat seal layer 36 may have a single layer structure or a multilayer structure.
For example, the heat seal layer 36 may have an easy peel property. The heat seal layer 36 having an easy peel property may be any peeling type such as a cohesive peeling type for phase separation and an interface peeling type for peeling at the interface with the adherend.

  The thickness of the heat seal layer 36 is determined in consideration of the material and the like. For example, the thickness is preferably 5 to 130 μm, more preferably 5 to 90 μm, further preferably 10 to 60 μm, particularly preferably 10 to 50 μm, and 20 to 50 μm. Is most preferred. When the thickness of the heat seal layer 36 is equal to or more than the above lower limit value, the hydrophilic zeolite and the hydrophobic zeolite in the zeolite-containing layer are easily activated during the heat treatment, and the activated state is maintained. It becomes easy to be done. When the thickness of the heat seal layer 36 is equal to or less than the above upper limit value, the adsorptivity of off-flavors is easily increased, and the original odor of the contents is easily maintained.

<Method for producing film for packaging>
The manufacturing method of the film 1 for packaging bodies includes a step of manufacturing a laminated film from the barrier material and the sealant material (laminated film manufacturing step) and a step of heat-treating the laminated film (heat treatment step).

≪Laminated film manufacturing process≫
In the laminated film production process, a laminated film is produced. As a manufacturing method of a laminated film, a conventionally well-known manufacturing method is mentioned, For example, the following method is mentioned.
The manufacturing method of the laminated film of this embodiment includes the step of obtaining the base material 10 (base material manufacturing step), the step of obtaining the sealant material 30 (sealant material manufacturing step), the base material 10, the barrier material 20, and the sealant material 30. And a step of laminating (lamination step).

  The method of obtaining the base material 10 in the base material manufacturing process is selected from conventionally known methods such as an inflation method, a T-die method, and a co-extrusion method according to the material and configuration of the base material 10.

The method of obtaining the sealant material 30 in the sealant material manufacturing process is selected from conventionally known methods according to the material and configuration of the sealant material 30.
As a method for obtaining the sealant material 30, for example, a sealant that is a laminate of a laminate layer 32, a zeolite-containing layer 34, and a heat seal layer 36 by a coextrusion method using a T-die coextrusion machine, an inflation coextrusion machine, or the like. The method of obtaining the material 30 is mentioned.

The method of laminating the base material 10, the barrier material 20, and the sealant material 30 in the laminating step is selected from conventionally known methods such as a dry laminating method.
In the dry laminating method, for example, an adhesive is applied to one material to be laminated, and after drying, this is pressure-bonded to the other material to obtain a laminated film. The obtained laminated film is wound up, for example, in a roll shape.

≪Heat treatment process≫
After manufacturing a laminated film as mentioned above, the heat processing process which heat-processes to a laminated film is performed.
Heat treatment of the laminated film activates the hydrophilic zeolite and the hydrophobic zeolite in the zeolite-containing layer. When the hydrophilic zeolite is activated, the original odor of the contents is easily maintained. When the hydrophobic zeolite is activated, the adsorptivity of off-flavors is enhanced.
In the present invention, the zeolite-containing layer is provided between the barrier material and the heat seal layer. That is, the zeolite-containing layer is not directly in contact with the outside air (water vapor). Thereby, when the heat treatment is performed, the hydrophilic zeolite and the hydrophobic zeolite in the zeolite-containing layer are sufficiently activated. In addition, the activated state is easily maintained.
The temperature of heat processing is 30-60 degreeC, and 35-50 degreeC is preferable.
When the temperature of the heat treatment is less than the lower limit, the activation of the hydrophobic zeolite and the hydrophilic zeolite becomes insufficient, and the adsorbability of off-flavors and the maintenance of the original odor of the contents cannot be sufficiently obtained. If the temperature of the heat treatment exceeds the upper limit, the film constituting the laminate may be damaged by heat.
The heat treatment time is 5 hours or more, preferably 5 to 96 hours, more preferably 12 to 48 hours. When the heat treatment time is less than the lower limit, the activation of the hydrophobic zeolite and the hydrophilic zeolite becomes insufficient, and the adsorbability of a strange odor and the maintenance of the original odor of the contents cannot be sufficiently obtained. On the other hand, even if the heat treatment time exceeds the upper limit, the hydrophilic zeolite and the hydrophobic zeolite are not activated any more, and the heat treatment time is wasted and the productivity may be reduced.
The heat treatment of the laminated film can be performed in a conventionally known temperature-controlled room or the like.
In addition, the laminated | multilayer film in which this heat processing process was given, and the laminated film which is not so can be discriminate | determined, for example by analyzing the hardening state of both adhesive agents.

<Packaging body>
The packaging body of this embodiment uses the packaging body film of this embodiment. Examples of the package include bags formed by heat-sealing the heat seal layers 36 of the film 1 for a package. Examples of the form of the package include a palm-attached bag, a three-side seal bag, a four-side seal bag, a gusset bag, a stand bag, and a bag with these chucks.
Further, for example, the packaging body includes a container body having an opening and a lid made of the packaging body film 1, and a heat seal layer 36 is brought into contact with the periphery of the opening of the container body, so that the packaging body film Examples include a container in which 1 is heat-sealed to the container body. The material of the container body in this case is not particularly limited, and examples thereof include PET, metal, paper, and the like.

According to the film for packaging body of this embodiment, it is excellent in the selective adsorption property of a strange odor and excellent in the maintenance of the original odor of the contents.
For this reason, the packaging film of the present embodiment is required to suppress off-flavors such as coffee (coffee beans), tea (tea leaves) such as green tea and black tea, and maintain the original odor of the contents. It is suitable as a packaging film for beverages and foods. In particular, coffee is required to maintain its unique odor and suppress off-flavors. The packaging film of the present embodiment is excellent in maintaining the original odor of the contents and suppressing bad odor, and is suitable for packaging roasted coffee beans or pulverized bodies thereof.
In addition, according to the package formed from the film for packaging of the present invention, even when the beverage or food is packaged and stored, the original odor of the beverage or food being stored is maintained, Since the off-flavor is suppressed, when the package is opened after storage, the original odor of the beverage or food can be sufficiently felt.

(Second embodiment)
The packaging film according to the second embodiment of the present invention will be described with reference to the drawings. The packaging film 100 of FIG. 2 is obtained by laminating a barrier material 120 and a sealant material 30 in this order. That is, the packaging film 100 includes a barrier material 120 and a sealant material 30 provided on one surface of the barrier material 120.
In this embodiment, the difference from the first embodiment is that the barrier material 120 also serves as a base material.

The barrier material 120 is a material that doubles as the base material 10 and the barrier material 20 in the first embodiment.
As the barrier material 120, a metal-deposited film in which a metal such as aluminum is vapor-deposited or silica is vapor-deposited on a resin film similar to the substrate 10 in the first embodiment, such as PET, OPP, CPP, HDPE, MDPE. Vapor deposition film. Among these, a metal vapor deposition film is preferable.
By using a vapor deposition film as the barrier material 120, it is possible to suppress the transmission of water vapor and odor.

The thickness of the barrier material 120 is the same as the thickness of the base material 10 in the first embodiment.
As a method for producing the packaging film 100, a conventionally known production method can be employed. For example, the vapor deposition film is obtained as the barrier material 120, and the barrier material 120 and the sealant material 30 are overlapped so that the vapor deposition surface of the barrier material 120 and the laminate layer 32 come into contact with each other, and heated while pressing the barrier material 120. .

  According to this embodiment, since the film for packaging bodies can be thinned, the further improvement of a softness | flexibility can be aimed at.

(Other embodiments)
In the above-described embodiment, the sealant material includes the laminate layer. However, the present invention is not limited to this, and the laminate layer may be omitted, and the zeolite-containing layer may also serve as the laminate layer. However, it is preferable to provide a laminate layer from the viewpoint of further improving the adhesion between the barrier material and the sealant material.

EXAMPLES Hereinafter, although an Example is shown and this invention is demonstrated, this invention is not limited to a following example.
The materials used in this example are as follows.

(Materials used)
<Base material>
PA: nylon, Harden film N1102 (trade name), manufactured by Toyobo Co., Ltd.
PET: Lumirror (trade name), manufactured by Toray Film Processing Co., Ltd.
<Barrier material>
-Al: Aluminum foil, manufactured by UACJ Corporation.
EVOH: Eval (trade name), manufactured by Kuraray Co., Ltd.
-Al vapor-deposited PET: VM-PET (trade name), manufactured by Toray Film Processing Co., Ltd.
<Sealant material>
PE: LLDPE, Rix (trade name), manufactured by Toyobo Co., Ltd.
<Zeolite>
Hydrophilic zeolite: average particle size = 10 μm, Na ion, SiO ₂ / Al ₂ O ₃ ratio = 2.3, crystal water amount = 240 mol.
Hydrophobic zeolite: average particle size = 4 μm, Na ion, SiO ₂ / Al ₂ O ₃ ratio = 70, crystallization water amount = 276 mol.

(Examples 1-7, Comparative Examples 1-6)
<Examples 1-7, Comparative Examples 2-3, 5>
≪Laminated film manufacturing process≫
The base film, barrier material, and sealant material shown in Table 1 were laminated to produce laminated films according to the configurations of Examples 1 to 7 and Comparative Examples 2 to 3, and 5. The sealant material is obtained by molding the constituent materials of each layer by a co-extruder. In addition, the base material, the barrier material, and the sealant material were stacked and dry laminated so that the laminate layer was in contact with the barrier material.
In Examples 2 and 6, the barrier material also serves as the base material, and the barrier material PET is the outermost layer. In Example 6, EVOH is laminated on one surface of Al vapor-deposited PET to form a barrier material.
≪Heat treatment process≫
The obtained laminated film was heat-treated at the temperature and time shown in Table 1 to produce films for packaging bodies of Examples 1 to 7 and Comparative Examples 2 to 3, and 5.
<Comparative Examples 1 and 6>
A packaging film was produced in the same manner as in Example 1 except that no barrier material was provided. At this time, the base material and the sealant material were arranged so that the laminate layer was in contact with the base material.
<Comparative example 4>
A laminated film of Comparative Example 4 was produced in the same manner as in Example 1 except that the heat treatment was not performed. (Hereinafter, the laminated film of Comparative Example 4 is also referred to as “film for packaging” as in the other examples.)

(Evaluation method)
Using the packaging film obtained in each example, a flat bag of 200 mm × 300 mm was produced.
Next, the coffee beans were roasted, 300 g of the roasted coffee beans were sealed in the above flat bag, and then stored for 1 month in an environment of 30 ° C. and humidity 50% RH.
The flat bag after storage was opened, and the original odor and off-flavor of the coffee felt at that time were scored by 5 panelists according to the following criteria. The average value of scoring results of five panelists was classified and evaluated according to the following evaluation criteria.
The evaluation results are shown in Table 2.

[Criteria for determining the original odor of coffee]
4 points: The original odor remains without weakening.
3 points: The original odor is slightly weakened.
2 points: The original odor is reduced to about half.
1 point: The original odor is very weak.
0 points: The original odor is not felt.
[Evaluation criteria for the original odor of coffee]
A: 3 or more points.
○: 2 points or more and less than 3 points.
Δ: 1 point or more and less than 2 points.
X: Less than 1 point.

[Judgment criteria for off-flavors]
4 points: A very strong odor is felt.
3 points: A slightly strong odor is felt.
2 points: A weak nasty smell is felt.
1 point: A slight odor is felt.
0 point: No off-flavor is felt.
[Evaluation criteria for off-flavors]
A: Less than 1 point.
○: 1 point or more and less than 2 points.
Δ: 2 or more and less than 3 points.
X: 3 or more points.

(Comprehensive evaluation)
Based on the evaluation results of the above “original odor of coffee” and “unpleasant odor”, the films for packaging in each example were classified as follows and comprehensively evaluated. A comprehensive evaluation of A and B was accepted.
A: In the evaluations of “original odor of coffee” and “unpleasant odor”, all the evaluation results are “◎”.
B: In each evaluation of the above “original odor of coffee” and “unpleasant odor”, at least one of the evaluation results is “◯” and there is no “Δ” or “×”.
C: In each evaluation of the above “original odor of coffee” and “unpleasant odor”, at least one evaluation result is “Δ” and there is no “x”.
D: In each evaluation of the above “original odor of coffee” and “unusual odor”, at least one of the evaluation results is “x”.

As shown in Table 2, the comprehensive evaluation of Examples 1 to 7 to which the present invention was applied was “A”.
On the other hand, when PA was used as a base material and a film for a packaging body (Comparative Example 1) without a barrier material was used, the residual odor of coffee was not sufficient, and the suppression of off-flavors was not sufficient.
This is because water vapor from the outside penetrates into the package and incorporates a highly water-soluble fragrance component contained in the original odor of coffee, resulting in a decrease in the residual odor of coffee and an imbalance in the fragrance component. It is thought that the odor (off-flavor) was felt.
When a film for a packaging body having a zeolite-containing layer of 10 μm PE (Comparative Example 2) was used, the residual odor of the original coffee was not sufficient, and the odor was not sufficiently suppressed.
This is because the thickness of the zeolite-containing layer is not sufficient, the odor is not sufficiently adsorbed on the hydrophobic zeolite of the zeolitic-containing layer, and the odor (off-flavor) comes to be felt. This is probably because the original odor of coffee was taken in, and the balance of odor components was lost, making it difficult to feel the original odor of coffee.

When a film for a packaging body (Comparative Example 3) having a hydrophilic / hydrophobic ratio of 1/9 between hydrophilic zeolite and hydrophobic zeolite in the zeolite-containing layer is used, the residual odor of the coffee is not sufficient, and the odor is suppressed. Was not enough.
This is because the proportion of hydrophobic zeolite in the zeolite-containing layer is too large, and the selective adsorption of off-flavors cannot be sufficiently obtained, and a part of the original odor of coffee is adsorbed in the zeolite-containing layer, and the residual odor of the original coffee odor is retained. This is thought to be due to the fact that the balance of odor components was lost and the off-flavor was felt.
When the film for packaging bodies (Comparative Example 4) that was not subjected to the heat treatment was used, the residual odor of the coffee was not sufficient, and the odor was not sufficiently suppressed.
This is because heat treatment was not performed, so that the hydrophobic zeolite and the hydrophilic zeolite in the zeolite-containing layer were not sufficiently activated, and the high-hydrophobic odor component was not sufficiently adsorbed on the hydrophobic zeolite, resulting in off-flavor (off Flavor), water vapor in the package is not sufficiently adsorbed by the hydrophilic zeolite and stays in the package, and the original odor of coffee is taken in, and the balance of odor components is lost. This is thought to be because it became difficult to feel the odor.

When the film for packaging bodies (Comparative Example 5) which does not have a heat seal layer was used, the residual odor of the original coffee was not sufficient, and the odor was not sufficiently suppressed.
This is because the zeolite-containing layer is in direct contact with water vapor because it does not have a heat seal layer, and the activation of hydrophobic zeolite and hydrophilic zeolite is insufficient even when heat treatment is performed. Furthermore, it is considered that the activated state is hardly maintained. As a result, the high-hydrophobic odor component is not sufficiently adsorbed on the hydrophobic zeolite, and the odor (off-flavor) is felt, and the water vapor in the package is not sufficiently adsorbed on the hydrophilic zeolite and remains in the package. This is thought to be due to the fact that the original odor of coffee was taken in and the balance of odor components was lost, making it difficult to feel the original odor of coffee.
When PET was used as a base material and a film for a packaging body (Comparative Example 6) without a barrier material was used, the original odor persistence of coffee was not sufficient.
This is probably because the transmission of odors could not be suppressed and the original odor of coffee could not be kept in the package.
From the above results, it was confirmed that by applying the present invention, the original odor of the contents can be maintained, and the off-flavor can be reduced.

DESCRIPTION OF SYMBOLS 1,100 Film 20 for packaging bodies, 120 Barrier material 30 Sealant material 34 Zeolite content layer 36 Heat seal layer

Claims (5)

A barrier material, and a sealant material provided on one surface of the barrier material,
The sealant material includes a heat seal layer and a zeolite-containing layer containing hydrophilic zeolite and hydrophobic zeolite, and the zeolite-containing layer and the heat seal layer are arranged in order from the barrier material side. Become
The hydrophobic zeolite has a molar ratio represented by SiO ₂ / Al ₂ O ₃ of 50 to 80,
The hydrophilic zeolite and the hydrophobic zeolite have a mass ratio represented by hydrophilic zeolite / hydrophobic zeolite of 2/8 to 7/3,
The zeolite-containing layer has a thickness of 15 μm or more,
A film for packaging, which has been heat-treated at 30 to 60 ° C. for 5 hours or more.   The said barrier material is metal foil or a metal vapor deposition film, The film for packaging bodies of Claim 1 characterized by the above-mentioned.   The packaging film according to claim 1 or 2, which is used for packaging roasted coffee beans or a pulverized product thereof.   The packaging body by which the film for packaging bodies as described in any one of Claims 1-3 is bag-formed. It is a manufacturing method of the film for packaging bodies according to claim 1,
A step of producing a laminated film by laminating a sealant material on one surface of the barrier material and the barrier material;
And a step of heating the laminated film at 30 to 60 ° C. for 5 hours or more.

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