JP2002332054A - Spout tool, vessel and gas barrier film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spout tool of a vessel which is excellent in gas barrier property, and easily unsealed. SOLUTION: In a pull-open type spout tool 10, the gas barrier property film 26 joined with a base panel 18 for closing the inside of a cylindrical spout tool body 14 comprises a base material 28 formed of a synthetic resin film with a large number of pores 32 and a gas barrier layer 30 formed of a gas barrier property material which is laminated on one side of the base material. In this configuration, a large number of pores are formed in the base material of the gas barrier property film, and when the shear force is applied thereto, the base material can be easily torn at the part. Thus, when a part of the base panel is removed along a weakening line 20, the gas barrier property film 26 is easily torn together with a removed part of the base panel, and removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film having excellent gas barrier properties, a container using such a gas barrier film for closing an opening, or a container discharging device.

[0002]

2. Description of the Related Art Seasonings such as soy sauce and dressing, jams, dairy products, beverages such as juices and liquors, and other foods.
Alternatively, containers for storing non-food items such as shampoos, rinses, bath salts, detergents, and chemicals include paper containers, glass bottles, synthetic resin bottles, bag-in-boxes, container interior bags, and pouches with spouts. There are various things. There is a so-called pull-open type spouting tool (spout) used to pour contents (poured matter) used in these containers. Most of the pull-open type dispensers consist of a cylindrical dispenser body injection molded from polyethylene (hereinafter referred to as “dispenser body”), and before opening, the inner opening of the dispenser body is closed. It is closed by a base integrally formed with the main body. This base has the outline of any closed section within the base,
A weakening line made of a groove (that is, thinned) is provided, and the inside of the weakening line can be broken or removed from the dispensing tool body by pulling the inside of the weakening line with a pull ring.

[0003] The form of the weakened line may be a solid line, a dashed line of equal or unequal intervals, a dashed line of equal or unequal length, or a combination thereof. Here, the broken line is simply referred to as a perforation. Also, the line of weakness is
Continuous or discontinuous grooves of equal or unequal depth can be used.

A weakened line forming an outline of an arbitrary closed section in a base is basically a circular line, an elliptical line or an annular line partially including these shapes, and extends to the inside or outside of the annular line as necessary. Can be included.

[0005] By the way, polyethylene, which is a typical material of the spouting tool, has a low gas barrier property. In particular, in the case of a pull-open type spouting tool, a thinned groove is formed due to the weakened line portion. Gas permeation from the container increases, and due to the structure of the lid, if the thickness of the resin used for the lid is small, gas permeation increases. There is a problem with using a polyethylene pull-open dispenser as the dispenser.

For this reason, conventionally, a gas barrier film formed by laminating a thin film of polyethylene or the like on both sides of an aluminum foil is formed on the back surface of the base (the inside surface of the container) by heat bonding or in-mold injection molding. Bonding and providing gas barrier properties have been performed (for example, JP-A-57-77455 and JP-B-7-35166). Gas barrier films based on aluminum foil are easily broken and do not hinder the removal of the substrate, and this means has been widely adopted as an effective means.

Here, the gas barrier property refers to an organic volatile gas such as oxygen gas, carbon dioxide gas, nitrogen gas, helium gas, water vapor, inorganic volatile gas such as ethylene or acetic acid vapor, organic acid vapor or aromatic organic vapor. Or, a property of suppressing the permeation of these mixed gases.

[0008] The material having gas barrier properties (gas barrier material) refers to a material composed of a gas barrier synthetic resin, a gas barrier inorganic oxide, or vapor-deposited aluminum.

As the gas-barrier synthetic resin, a partially saponified ethylene / vinyl acetate copolymer (= ethylene / vinyl acetate copolymer) is used.
A vinyl alcohol copolymer), a vinylidene chloride copolymer, an aliphatic polyketone or a hydrogenated aliphatic polyketone obtained by reducing the carbonyl group thereof with hydrogen, and a gas barrier resin containing a polyalcohol and a polycarboxylic acid as essential components (hereinafter referred to as " GB) or mixtures thereof.

As the gas barrier inorganic oxide, silicon oxide, magnesium oxide, aluminum oxide, a mixture thereof, or the like represented by the chemical symbol SiOx (X = 0.8 to 2.0) can be preferably used. . The gas barrier inorganic oxide can be deposited on a synthetic resin base material and used as a gas barrier deposited film.

[0011]

However, from the viewpoints of reducing the environmental burden and separating and collecting wastes in recent years, aluminum foil is burned after incineration, and has an adverse effect during recycling. In addition, when the content is a volatile acid, the aluminum foil is eroded, a pinhole is opened, and the gas barrier property of the aluminum foil may be reduced. It can be.

For this reason, it has been studied to replace the gas barrier layer of the gas barrier film in the pouring tool with a material other than aluminum foil.

As one of the proposals, it has been proposed that the gas barrier layer be a thin film layer made of a metal oxide. For example, Japanese Patent Application Laid-Open No. Hei 6-270936 discloses that a gas barrier layer is directly deposited inside a synthetic resin pouring tool. Means for providing a thin film layer made of a metal oxide by the above method is disclosed. The thin film layer made of a metal oxide has no fear of oxidation and, when formed by vapor deposition, has an extremely small amount, so that no incineration remains after incineration. However, in this method, it is necessary to treat each dispensing tool one by one, and there is a problem that the cost increases.

Further, there is provided a method in which a gas barrier film is formed by depositing silicon oxide or aluminum oxide on a PET (polyethylene terephthalate) film or the like as a base material and bonding the gas barrier film to the back surface of the base of the pouring tool. Has also been proposed. Such a gas barrier film is
Although there is an advantage that it can be easily bonded to the pouring device, the base material such as PET has a large breaking strength. There is a problem that even if the integrated pull ring is pulled, it cannot be opened or an excessive force is required for opening.

The present invention has been made in view of the above circumstances, and one of its objects is to provide a container having excellent gas barrier properties and easy opening, or a container discharging device.

Another object of the present invention is to provide a gas barrier film in which a portion to be opened by a line of weakness can be easily broken.

[0017]

In order to achieve the above object, the present invention comprises a base on which a portion from which a substance is discharged is defined by a weakened line, and a gas barrier film bonded to the base. In the pouring tool, the gas barrier film includes a base made of a synthetic resin film having a large number of fine holes, and a gas barrier layer made of a gas barrier material laminated on one surface of the base. It is characterized by.

The fine holes are preferably formed on the entire surface of the substrate. Further, the gas barrier layer may be laminated on both surfaces of the substrate.

In such a configuration, since the gas barrier film is bonded to the base of the pouring tool, the gas that tries to pass through the base can be blocked by the film. Further, since a gas barrier film has a large number of micropores formed in its base material, it can be easily torn at the site when a shear force is applied. Therefore, if a part of the base of the dispensing device is removed along the line of weakness, the gas barrier film together with that part of the base is easily torn and removed. In addition, since the base material itself can be thickened, silicon oxide, aluminum oxide,
A gas barrier layer of aluminum or the like can be laminated thinly, and problems during incineration can be avoided.

It is preferable that the spout has a tubular main body (a spout main body) and a base is integrally formed with the spout main body so as to close the inside of the spout main body.

As a bonding means to the substrate of the gas barrier film, there is an adhesive. In the case where a heat-fusible resin layer made of a heat-fusible synthetic resin is further laminated on the surface of the gas barrier film, a heat-sealing resin is used. It becomes possible to apply a fusion method or an in-mold injection molding method.

Further, the concept of the present invention is not limited to the pouring tool, but includes a container body having an expected opening which is cut by a weakening line to define an opening, and a gas barrier joined to the expected opening. The present invention is also applied to a container having a conductive film, and a gas barrier film to be joined to the scheduled opening portion is provided with a base made of a synthetic resin film having a large number of micropores formed thereon, and one surface of the base. And a gas barrier layer made of a gas barrier material laminated on the substrate.

Also in this case, similarly to the pouring device, the gas barrier film can be easily and simultaneously cut along the weakening line when a part of the opening is opened along the weakening line.

The gas barrier film may be bonded to the entire inner surface of the container body, or may be bonded to only the back surface of the lid when the opening is to be a lid like a cup noodle container.

Further, the present invention comprises a substrate made of a synthetic resin film having a large number of fine holes formed on the entire surface, and a gas barrier layer made of a gas barrier material laminated on one surface of the substrate. The present invention also relates to a container formed by joining a sheet to be opened, which constitutes a bag-shaped container main body from the gas barrier film and has a portion to be opened by being cut by a weakening line on the surface of the container main body. is there.

Although the container body is made of a gas barrier film, the relationship between the sheet to be opened and the gas barrier film is determined by the relationship between the above-mentioned opening portion of the container and the gas barrier film bonded thereto. Since the relationship is the same, the same effect as described above can be obtained.

Further, the present invention comprises a substrate made of a synthetic resin film having a large number of micropores formed thereon, and a gas barrier layer made of a gas barrier material laminated on one surface of the substrate. It is characterized by a gas barrier film, and can be applied to various containers by using such a gas barrier film.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. Note that the same or corresponding parts are denoted by the same reference symbols throughout the drawings.

FIG. 1 is a sectional view showing a pouring device according to one embodiment of the present invention. The pouring tool 10 is used by being attached to a container 12 made of a suitable synthetic resin or paper by heat fusion, an adhesive, or other means.

The pouring tool 10 is an integral product manufactured by injection molding or the like from a synthetic resin such as polyethylene, and has a tubular pouring tool body 14. An outwardly facing flange portion 16 is formed at one end of the pouring tool main body 14, and the container 12 is attached thereto.

Further, the flange portion 16 of the pouring device main body 14 is provided.
A base 18 for closing the inside of the spout main body 14 is integrally formed at the end on the side where is formed. The base 18 has a weakened line 20 formed in a ring shape. A pull ring 24 for inserting a finger from the other end side of the pouring tool main body 14 and pulling and removing the inner base portion 22 is provided in an inner portion (hereinafter referred to as “inner base portion”) 22 defined by the weakening line 20. ing.

A gas barrier film 26 is bonded to the back surface of the base 18 (the surface on the inner side of the container 12) of the pouring device 10 having such a configuration. As schematically shown in FIG. 2, the gas barrier film 26 of the illustrated embodiment is composed of a substrate 28 made of a synthetic resin film and a gas barrier material laminated on one surface of the substrate 28. And a thin gas barrier layer 30.

As the substrate 28, for example, PET (polyethylene terephthalate), PEN (polyethylene
Films of ester resins such as 2,6-naphthalate) and PBT (polybutylene terephthalate), films of polyamide resins such as nylon, and films of olefin resins such as biaxially oriented polypropylene (OPP) are preferable. This is because they are tough and have relatively high heat resistance and chemical resistance. It is also suitable for incineration.

The base material 28 has an average opening diameter of 0.5 to
Micropores 32 of 100 μm, more preferably 5 to 80 μm
Are formed in a large number, preferably at a density of 1000 / cm ² or more. The large number of fine holes 32 are formed by a so-called embossing process in which the base material is passed between a roll having a myriad of fine blades such as diamond particles on a surface thereof and a pressing roller whose surface is coated with urethane while being sandwiched therebetween. , Can be formed. Various other methods for forming micropores are conceivable, such as surface etching with laser, surface treatment with powder by sandblasting, and etching by plasma irradiation. Further, the fine holes 32 may have any shape such as a conical shape, a hemispherical shape, a pyramid shape, and the like, but it is preferable that the fine holes 32 are not formed as through holes as much as possible.

The thin gas barrier layer 30 is laminated on the substrate 28. The gas barrier layer 30 uses the gas barrier material described above.

The GB includes a combination of polyvinyl alcohol (PVA) and a (meth) acrylic acid-based polymer, a combination of a saccharide and a (meth) acrylic acid-based polymer, and a part of PVA and a (meth) acrylic acid-based polymer. A combination of a hydrate or a saccharide and a partially neutralized product of a (meth) acrylic acid-based polymer can be suitably used.

In the above combination of PVA and (meth) acrylic acid-based polymer, the weight ratio of PVA: (meth) acrylic acid-based polymer is preferably in the range of 95: 5 to 10:90, more preferably 80: 20-20:
It is preferably within the range of 80.

On the other hand, in the above combination of the saccharide and the (meth) acrylic acid-based polymer, the mass ratio of the saccharide:
80:20 to 5:95 (meth) acrylic acid polymer
And more preferably in the range of 60:40 to 1
It is preferably within the range of 0:90.

Here, examples of the saccharide include a biopolymer synthesized in a biological system by polycondensation of various monosaccharides or a polymer obtained by chemically modifying this polymer. The saccharides include, for example, monosaccharides, oligosaccharides, sugar alcohols and polysaccharides, more preferably sorbitol, dextrin and water-soluble starch.

In the combination of the above-mentioned saccharide and partially neutralized product of a (meth) acrylic acid-based polymer, the above-mentioned partial neutralization (the carboxyl group of the polymer is partially made to be a carboxylate group) It is preferable to carry out using at least one selected from the group consisting of sodium hydroxide, potassium hydroxide and ammonium hydroxide. This neutralization degree is 0
A partially neutralized product having a content of -20%, more preferably 0-18%, is suitably used.

These gas barrier materials have a gas barrier property for preventing permeation of oxygen and other gases in an extremely thin film state. Also, when laminated thinly, these materials have almost no problem of residues after incineration.

The method of laminating the gas barrier layer 30 on the substrate 28 is appropriately selected depending on the material of the film to be laminated.
For example, for a metal film such as aluminum or a metal oxide film such as silicon oxide or aluminum oxide, a vacuum deposition method is a preferable method. Further, in the case of a synthetic resin film, it is preferable to laminate the resin film on the base material 28 by a coating method. For example, in the case of a GB layer, an extremely thin GB coating layer can be formed by coating a mixture of polyacrylic acid and a starch solution (polyalcohol) on the base material 28 and then performing drying and heat treatment. It is.

The gas barrier layer 30 may be formed on any surface of the substrate 28, but may be formed on a flat surface of the substrate 28 (the surface opposite to the surface on which many openings 32 are formed). Preferably, it is formed. By laminating on this side, the gas barrier layer 30 can be formed uniformly with a uniform thickness over the entire surface of the base material 28, whereby a more uniform gas barrier property can be obtained over the entire surface of the gas barrier film. it can.

If a part of the fine hole 32 of the base material 28 is a through hole, it may not be possible to close the through hole by the vapor deposition method. It is preferable to form the gas barrier layer 30 by a coating method capable of closing the gas barrier layer.

In the above description, the gas barrier layer 30 is laminated after forming the fine holes 32 in the base material 28 so that the through holes are not formed in the gas barrier film 26. However, if it does not become a through-hole, the gas barrier layer 3
After laminating 0, fine holes 32 may be formed on the surface of substrate 28 opposite to gas barrier layer 30.

When a shearing force is applied to the gas barrier film 26 thus formed, the substrate 28 has numerous micropores formed thereon, and the gas barrier layer 30 on the surface thereof is extremely thin. It can be easily torn at the site where the shearing force is applied.

The thickness of the base material 28 is selected so as to ensure easy tearing, strength for laminating the gas barrier layer 30, and easy handling at the time of joining to the base 18.
The thickness is appropriately determined depending on the material, but is preferably about 5 to 70 μm. Further, it is preferable that the thickness of the gas barrier layer 30 is as thin as possible so that the base material 28 can maintain the easily tearable property as long as the gas barrier property is maintained. For example, in the case of the gas barrier layer 30 of GB, if the thickness is about 1 μm, sufficient gas barrier properties can be obtained, and the gas barrier layer 30 can be easily torn together with the substrate 28.

The gas barrier film 26 formed as described above is cut into a shape larger than at least the inner base portion 22 of the spout 18, and a circular shape larger than the end of the spout main body 14 in the illustrated embodiment. After that, a suitable adhesive, for example, a urethane-based adhesive is thinly applied and adhered to the back surface of the base 18 of the pouring tool 10 and the back surface of the inner peripheral portion of the flange portion 16.

Since it is not preferable that a gap is formed between the base 18 and the gas barrier film 26 when the gas barrier film 26 is bonded, the weakened line 20 is located on the front side of the base 18 (outside of the container 12). On the side where

The side to be adhered to the base 18 may be on either side of the gas barrier layer 30 or the base material 28. In the case where the gas barrier layer 30 is made of aluminum and the contents of the container 12 are acidic, for example. In order to prevent oxidation of the gas barrier layer 30, the gas barrier layer 30 is bonded to the substrate 18.

As described above, the attachment of the spout 10 to the container 12 is performed by joining the container 12 to the surface of the flange portion 16 protruding from the spout main body 14 by means such as heat fusion or adhesion. Done in In this state,
Even though the dispenser 10 is made of a gas permeable material such as polyethylene, the gas permeable portion is substantially the base 18 inside the dispenser body 14, especially the weakening line 20.
Many of the parts that have been subjected to light transmission. In this portion, the gas barrier film 26 is adhered to the entire back surface of the base 18, so that gas transmission from this portion is also prevented. Accordingly, it is possible to prevent the contents of the container 12 from being oxidized.

When the dispensing tool 10 is opened, the inner base portion 22 together with the pull ring 24 is cut off from other portions of the base 18 by holding the pull ring 24 with a finger and pulling. As a result, a circular opening is formed in the center of the base 18, and the contents can be poured out through this opening. When the gas barrier film 26 of the present embodiment is subjected to a shearing force, it is easily torn along the region where the shearing force is applied. Therefore, at the time of opening, the gas barrier film 26 prevents removal of the inner base portion 22. This is not the case and is also removed along with the inner base portion 22 along the line of weakness 20. Therefore, the inner base part 2
After 2 is removed, the rest of the gas barrier film 26 does not protrude inward from the opening of the base 18. This is an advantageous effect for smoothly discharging the contents of the container.

Although the preferred embodiment of the present invention has been described above, it is needless to say that the present invention is not limited to the above embodiment.

For example, in the above embodiment, the gas barrier film 26 is bonded to the base 18 of the pouring tool 10 with an adhesive, but the bonding may be performed by other means, for example, a heat fusion method. The reason for using the adhesive in the above embodiment is that the gas barrier film 26 is bonded to the base 18 with the gas barrier layer 30, but even if the gas barrier layer 30 is formed from a heat-fusible material, it is extremely thin. Therefore, it is not suitable for the heat fusion method. Also,
This is because, when the base material 28 is also made of the above-described material such as PET, it does not have heat fusion property. Therefore, the gas barrier film 26 is bonded to the base 1
8, it is necessary to make the gas barrier film 26 have heat-fusibility. Specifically, at least the joint side surface of the gas barrier film 26 shown in FIG.
Preferably low density polyethylene on both sides, as shown in FIG.
A heat-fusible synthetic resin of medium-density polyethylene, ethylene / α-olefin copolymer, ethylene / vinyl acetate copolymer or a mixture thereof is formed into a thin layer, and the heat-fusing property of this gas barrier film 26 'is formed. The resin layer 34 is joined to the base 18 by thermal fusion. In order to prevent the heat-fusible resin layer 34 from deteriorating the tearability of the gas barrier film 26 ', the thickness of the layer needs to be suppressed to, for example, about 40 [mu] m.

As shown in FIG. 3, in the case of a gas barrier film 26 'having a heat-fusible resin layer 34 on both sides,
It is also possible to apply an injection molding method of an in-mold type (a molding type with a picture). In the in-mold injection molding method, a disk-shaped gas barrier film 26 'is mounted in a mold (not shown), and a material (polyethylene or the like) of a pouring tool is injected into a cavity in the mold. As shown in FIG. 4, a gas-barrier film 26 'is embedded in the base 18 and is flush with the back surface of the flange portion 16, and as shown in FIG. 5, the lower surface of the gas-barrier film 26' is also provided. Dispenser 1 of relatively complex shape in which dispenser component 36 is arranged
0 "can also be formed. Note that the pouring tool 1 shown in FIG.
At 0 ', a thread 40 is formed on the outer peripheral surface of the spout main body 14 so that the cap 38 can be screwed into the spout main body 14. 5 is for attachment to the mouth 44 of a container 42 such as a glass bottle.
Reference numeral 46 indicates a snap-type cap.

Further, the present invention can be applied to a portion that becomes an opening of a container. For example, even in a container in which a pull-open type spout is integrally formed with the container body, the gas barrier film can be bonded to the base of the spout in the form shown in FIG. 2 or FIG.

The present invention can also be suitably applied to a paper box-shaped container 50 for storing paper or non-woven fabric having properties such as being easily discolored by contact with air, as shown in FIG. Can be. In the container 50 according to this embodiment,
The paper container main body 52 before opening is provided with a perforation (a weakened line) 54 extending from the front plate portion to the rear edge of the top plate portion, and the central portion of the container main body 52 along the perforation line 54. By cutting 56, an opening for taking out the contents is formed. 7, the easily tearable gas barrier film 26 "according to the present invention is adhered to the inner surface of the container main body 52 with an adhesive. As shown in FIG. 7, the gas-barrier film 26 ″ is formed by heat-sealing a low-density polyethylene or the like to the surface of the gas-barrier film 26 similar to that of FIG. Resin layer 34 is thin, for example, 40 μm
What is laminated to the extent is used. Thereby, heat fusion of the gas barrier films 26 ″ can be performed,
A sealed space can be formed in the container 50.

When such a container 50 is opened, if the central portion 56 of the container body 52 is pulled up along the perforation 54, the shearing force acting along the perforation 54 also acts on the gas barrier film 26 ". The portion of the gas barrier film 26 "bonded to the back surface of the container center portion 56 is torn from the other portion integrally with the container center portion 56. At this time, the force of pulling the container central portion 56 is small due to the tearability of the gas barrier film 26 ". The contour of the gas barrier film 26" cut together with the container central portion 56 is different from the contour of the container central portion 56. They almost coincide with each other, and other parts do not protrude inside the opening of the container 50.

In such a container 50, it is not necessary to bond the easily tearable gas barrier film 26 ″ according to the present invention to the entire inner surface of the container 50, and the back surface of the portion along the perforation 54 (planned opening portion) is not required. And a gas barrier film that is difficult to tear may be used for other portions.

6 and 7 can be similarly applied to the paper lid 62 of the cup noodle container 60 as shown in FIG. Conventionally, on the back side of the paper lid of the cup noodle container, aluminum foil has been stuck to prevent oxidation of the dried noodles that are the contents. The treatment of the foil is problematic. On the other hand, when the easily tearable gas barrier films 26, 26 ', 26 "according to the present invention are adhered to the back surface of the paper lid 62, there is no problem of burning out the aluminum foil.
In addition, if the perforations 64 are formed in the paper lid 62, there is an effect that opening can be performed reliably and easily in a desired shape.

Further, the gas barrier film according to the present invention can be constituted as a container itself. A container 70 shown in FIG. 9 is one example, and a bag-shaped container main body 72 for storing a wet tissue or the like is made of the easily tearable gas barrier film according to the present invention. As is understood from FIG. 10, this gas barrier film is equivalent to the gas barrier film 26 ″ shown in FIG. 7, and a heat-fusible resin layer 34 such as low-density polyethylene is provided on the surface of the base material 28 side. The gas barrier film 26 ″ is thin and is laminated, for example, to a thickness of about 40 μm.
Heat fusion between the two becomes possible, and a bag-like body having a high gas barrier property can be produced. On the surface of the container body 72, an adhesive sheet (scheduled to be opened) 76 on which a weakening line 74 (in this case, the continuous weakening line includes a continuous cutting line) such as a substantially U-shaped perforation is adhered. Have been. Thus, when the central portion 78 of the adhesive sheet 76 is cut along the weakening line 74 and pulled, only the gas barrier film 26 ″ (container main body 72) joined to the central portion 78 is cut, and the container main body 78 is cut off. At 72, an opening for taking out the contents is formed.

In the configuration shown in FIGS. 9 and 10, there is no need to form a weakening line such as a perforation in the container main body 72.
There is an effect that the production of the container becomes easy.

The use of the pouring device of the present invention is not particularly limited. For example, a direct blow-molded container, a biaxially stretched blow-molded container, an injection molded container, a vacuum pressure-air molded container,
Compression molding containers, rotational molding containers, plug assist molding containers, containers with a bag shape, containers with stand-up pouches,
For containers such as bag-in-box inner bags, tube-shaped containers, and composite containers made of synthetic resin on the outside and paper,
The spout of the present invention can be assembled by screwing, tapping or integral molding.

The contents to be filled in the container include, for example, processed tomato products containing a volatile acid such as acetic acid such as tomato ketchup, tomato puree, and tomato sauce, mayonnaise, sauces, and Japanese yam and poppy. Foods such as spice paste, cooking oil, dressing, soy sauce, mirin, vinegar, grilled meat sauce, pharmaceuticals, cosmetics, etc. can be exemplified.

[0065]

EXAMPLES Next, the results of evaluating the tear strength and the oxidative transmittance of a gas barrier film experimentally produced according to the present invention will be described as Example 1.

In Example 1, a gas barrier film corresponding to that shown in FIG. 2 was used in which a PET film was used as a base material and a GB layer was formed thereon as a gas barrier layer. The gas barrier film used in Example 1 was formed as follows. First, a 10-μm-thick PET film having a mean opening diameter of 10 μm was formed on one surface of a PET film having a thickness of 12 μm by embossing.
It was formed at a density of 00 pieces / cm ² . Immediately after the embossing, water was collected on the substrate, and leakage from the opposite surface was examined. As a result, no water leakage was found. Then, this PET
A 70/30 wt% mixture of polyacrylic acid and starch solution was applied to the opposite side of the film with the micropores,
Drying and heat treatment were performed at 0 ° C. for 15 minutes to form a gas barrier layer of about 1 μm, and a gas barrier film for Example 1 was obtained.

Further, a 70/30 wt% mixture of polyacrylic acid and a starch solution was applied to one surface of a PET film having a thickness of 12 μm without embossing.
Drying and heat treatment were performed at 0 ° C. for 15 minutes to form a gas barrier layer of about 1 μm, thereby obtaining a gas barrier film for Comparative Example 1.

For these gas barrier films,
Oxygen permeability is measured by MOCON's Oxygen Permeability Analyzer OX
Table 1 below shows the results obtained by measuring with TRAN 2/20 and measuring the tear strength without notching with an elemental tear strength tester manufactured by Toyo Seiki Co., Ltd.
It is. The oxygen permeability was measured in an environment at 23 ° C. and a relative humidity of 80%.

[0069]

[Table 1]

Table 1 shows that the gas barrier films of Example 1 and Comparative Example 1 both have low oxygen permeability, and that embossing does not lower the gas barrier properties. Further, if the oxygen permeability is 200 cm ³ / m ² · day · MPa or less, it has sufficient oxygen gas barrier properties even for foods to which no bactericide or antioxidant is added. It turns out that the condition is satisfied. Table 1 also shows that the tear strength of Example 1 was significantly lower than that of Comparative Example 1, and that the gas barrier film of Example 1 was extremely excellent in tearability.

In the tear strength test, the flow direction in the film surface during embossing is MD, and the direction TD is perpendicular to the flow direction.

Further, the pull ring was actually pulled using the injection tool experimentally manufactured according to the present invention, and the state of opening at the weakened line was evaluated for the opening property and the state of the opening after opening.

Here, as Example 2, an injection tool (inner diameter of the injection tool body: 19 mm) having a shape shown in FIG. 1 was injection-molded from low-density polyethylene (d = 0.92), and a urethane-based material was formed on the back surface of the base. An adhesive was applied to a thickness of about 2 μm, and a gas barrier film experimentally produced in Example 1 was adhered thereto.

Further, as Example 3, a gas-barrier film experimentally produced in Example 1 having a low-density polyethylene film having a thickness of 20 μm adhered to both sides (corresponding to the gas-barrier film in FIG. 3) was used. The same type of injection tool as in Example 2 was heat-sealed to the base.

Further, the gas barrier film experimentally produced in Example 3 was cut into a disk shape, and the disk-shaped film was mounted on a mold of an in-mold type injection molding machine. By injecting polyethylene (d = 0.92), a pouring device having the form shown in FIG. The inner diameter of the pouring tool main body of this pouring tool is 19 mm as in the case of the second and third embodiments.

For comparison, a pour tool was used as Comparative Example 2 in which the gas barrier film without micropores produced in Comparative Example 1 was replaced with the gas barrier film of Example 2 and bonded.

In Comparative Example 3, a low-density polyethylene film having a thickness of 20 μm was adhered to both surfaces of the gas barrier film experimentally produced in Comparative Example 1, and was heat-sealed instead of the gas barrier film of Example 3. A pouring tool was used.

Further, as Comparative Example 4, a pouring device similar to that used in Comparative Example 3 except that the thickness of the base material of the gas barrier film was reduced to 9 μm was used.

The evaluation of the opened state of the pour tools used in Examples 2 to 4 and Comparative Examples 2 to 4 is as shown in the following table.

[0080]

[Table 2]

As can be understood from Table 2, all of Examples 2 to 4 have good openability, the gas barrier film is cut off in the same shape as the opening, and the gas barrier property remaining on the base outside the opening. Part of the film did not protrude inside the opening. It was also found that when the gas barrier film according to the present invention was used, good results were obtained regardless of the method of bonding the gas barrier film to the substrate.

On the other hand, in Comparative Examples 2 and 3, the opening was difficult and the state of the opening was poor. This is considered to be because the tear strength of the used gas barrier film was high. Also,
It was recognized that simply reducing the thickness of the base material could not sufficiently improve the openability and the state of the opening.

[0083]

As described above, according to the present invention,
Since the gas barrier film composed of the base material and the gas barrier layer can be made to have tearability, a container or a pour tool using the gas barrier film can be easily opened, and the cut state of the gas barrier film is It will be good. Of course, before opening, sufficient gas barrier properties are maintained, contributing to protection of the contents of the container.

Further, since the film is formed by a combination of the base material and the gas barrier layer, the gas barrier layer can be made extremely thin, thereby solving the problem that a large amount of gas barrier material such as aluminum remains as incineration after incineration. can do.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing an embodiment of a pouring device according to the present invention.

FIG. 2 is a schematic cross-sectional view showing, on an enlarged scale, a gas barrier film according to the present invention used in the pouring device of FIG.

FIG. 3 is a schematic sectional view showing another embodiment of the gas barrier film according to the present invention.

FIG. 4 is a schematic sectional view of a pouring device using the gas barrier film of FIG.

FIG. 5 is a schematic sectional view showing another embodiment of a pouring device using the gas barrier film of FIG.

FIG. 6 is a perspective view showing an embodiment of the container according to the present invention.

FIG. 7 is a schematic sectional view taken along the line VII-VII of FIG. 6;

FIG. 8 is a perspective view showing another embodiment of the container according to the present invention.

FIG. 9 is a plan view showing still another embodiment of the container according to the present invention.

FIG. 10 is a schematic sectional view taken along line XX of FIG. 9;

[Explanation of symbols]

10, 10 ', 10 "... dispenser, 12 ... container, 14 ... dispenser body, 16 ... flange, 18 ... base, 20 ... weakening line, 22 ... inner base, 24 ... pull ring, 26, 2
6 ', 26 "... gas barrier film, 28 ... substrate, 3
0: gas barrier layer, 32: micropore, 34: heat-fused resin layer, 50: box-shaped container, 52: container body, 54: perforation (weakened line), 60: cup noodle container, 62: paper lid, 64 …
Perforation (line of weakness), 70: container, 72: container body, 7
4 ... weakened line, 76 ... adhesive sheet (scheduled opening sheet).

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B65D 77/30 B65D 77/30 C 81/24 A 81/24 5/74 A F term (Reference) 3E060 AA03 BC01 BC04 CE03 CE22 CF05 CF06 DA14 EA03 EA13 EA14 3E064 AA00 AB00 EA12 FA03 HN06 HP01 HP04 3E067 AA03 AB26 AB81 AB96 BA12A BB14A BB25A CA04 CA07 EB02 EB32 EE59 3E084 AA12 BA02 CB01 AD04 CA11 CA35

Claims (18)

[Claims] 1. A pouring device comprising: a base in which a portion of a substance to be ejected is defined by a line of weakness; and a gas barrier film bonded to the base, wherein the gas barrier film includes a plurality of fine particles. A pouring device comprising: a base material made of a synthetic resin film having holes formed therein; and a gas barrier layer made of a gas barrier material laminated on one surface of the base material. 2. The pouring device according to claim 1, further comprising a tubular main body of the pouring device, wherein the base is integrally formed with the main body so as to close the inside of the main body. 3. The pouring device according to claim 1, wherein the fine holes are formed on the entire surface of the base material. 4. The pouring device according to claim 1, wherein the gas barrier layer is laminated on both surfaces of the substrate. 5. The gas barrier film according to claim 1, wherein the gas barrier film is bonded to the base with an adhesive.
The pouring device according to any one of items 1 to 4, 6. The gas barrier film further comprises a heat-fusible resin layer made of a heat-fusible synthetic resin laminated on at least one of the surface on the substrate side and the surface on the gas barrier layer side, The pouring device according to any one of claims 1 to 3, wherein a gas barrier film is bonded to the substrate by heat fusion on the heat-fusible resin layer side. 7. The gas barrier film further includes a heat-fusible resin layer made of a heat-fusible synthetic resin laminated on both sides, and the gas barrier film is bonded to the base by in-mold injection molding. The pouring device according to any one of claims 1 to 4, wherein 8. A container main body having an expected opening portion whose portion to be cut to become an opening is defined by a line of weakness, and a gas barrier film joined to the expected opening portion, wherein the gas barrier film is A container comprising: a base made of a synthetic resin film in which a large number of micropores are formed; and a gas barrier layer made of a gas barrier material laminated on one surface of the base. 9. The container according to claim 8, wherein the fine holes are formed on the entire surface of the substrate. 10. The container according to claim 8, wherein the gas barrier layer is laminated on both surfaces of the substrate. 11. The container according to claim 8, wherein the gas barrier film is bonded to an entire inner surface of the container main body. 12. The container according to claim 8, wherein the opening portion is a lid of the container, and a gas barrier film is bonded to a back surface of the lid. 13. A gas barrier film comprising a substrate made of a synthetic resin film having a large number of micropores formed thereon and a gas barrier layer made of a gas barrier material laminated on one surface of the substrate. A container comprising: a bag-shaped container main body; and a sheet to be opened, which is joined to a surface of the container main body, and a portion to be cut and formed as an opening is defined by a weakened line. 14. The container according to claim 13, wherein the micropores are formed on the entire surface of the substrate. 15. The container according to claim 13, wherein the gas barrier layer is laminated on both surfaces of the substrate. 16. A gas barrier film comprising: a base made of a synthetic resin film having a large number of micropores; and a gas barrier layer made of a gas barrier material laminated on one surface of the base. 17. The gas barrier film according to claim 16, wherein the fine holes are formed on the entire surface of the substrate. 18. The gas barrier film according to claim 16, wherein the gas barrier layer is laminated on both surfaces of the substrate.