JP2007076698A - Tube container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tube container with a cap whose barrier characteristic is improved wholly and which is provided with a function to prevent the discoloration and deterioration of a content owing to an oxygen gas and light. <P>SOLUTION: The tube container 10 has a tube body having one end provided wtih a mouth part 8 on/from which part a cap 2 can be freely mounted/removed and the other end closed by thermal adhesion, a bag-like body 20 is thermally adhered to the body part 4 of the tube body and covers the mouth side of the tube body mounting the cap on the mouth 8. The film forming the body 20 is made of a film having a barrier layer 34 and made of a resin having a heat seal characteristic at least on an inner layer. The peripheral edge of the body 20 is heat sealed in a condition where the inner layers of the film are faced and superposes mutually. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tube container that imparts barrier properties to the mouth side of the tube container body.

Conventionally, a tube container is usually manufactured by sequentially laminating at least a surface resin layer, an intermediate layer, and an inner surface resin layer in order, and then using the laminated material, surface resin layers at both ends thereof And the inner resin layer are superposed on each other and the opposite surface is heat-sealed to produce a cylindrical body, and then a head composed of a mouth, a shoulder, etc. at one opening of the cylindrical body. And a cap is screwed into this, and on the other hand, the contents are filled from the other opening of the cylindrical body, and then the opening is hermetically sealed to form a bottom seal. Forming and manufacturing packaged products consisting of laminated tube containers.
The tube container is filled with contents such as foods, cosmetics, and pharmaceuticals as contents, and is commercially available.
Among the contents of food, cosmetics, pharmaceuticals, etc. that are marketed by filling the above tube container, there are substances that are easily oxidized or browned by oxygen gas, for example, viscous liquid butter containing a lot of unsaturated fatty acids, For tube containers filled with such viscous liquid butter, etc., a tube container that imparts gas barrier properties to the tube container itself is usually used, thereby protecting the substance that is easily oxidized or browned by oxygen gas for a long time. It can be saved.

As a conventional tube container provided with gas barrier properties, for example, an aluminum foil having a thickness of about 7 μm to 60 μm and a vinylidene chloride coating layer are provided in an intermediate layer constituting a laminated sheet used for the body of the tube container. A tube container in which an axially stretched polyamide film, a polyester film having a vinylidene chloride coating layer, a polyester film with aluminum vapor deposition, an ethylene-polyvinyl alcohol copolymer resin film, or the like is used as a gas barrier layer has been proposed (for example, , See Patent Document 1).
JP-A-4-147848 (upper left column on page 10)

However, the cap, mouth, and shoulder of the tube container itself are not provided with a barrier property, so that oxygen easily enters the tube container body from the head of the tube container. When a substance that easily oxidizes or browns is contained, there is a problem that the contents are altered.
Accordingly, an object of the present invention is to provide a tube container to which the barrier property of the entire tube container with a cap is improved, and a function for preventing discoloration and alteration of contents by oxygen gas is added.

  As a result of repeating various studies to solve the above-described problems, the present inventor has a mouth portion in which a cap is detachably attached to one end of a tube body, In a tube container in which the other end of the tube body is closed by thermal bonding, the bag-like body is thermally bonded to the body portion of the tube body, and the mouth side of the tube body with the cap attached to the mouth portion is covered. The film constituting the bag-like body is made of a film having a heat-sealing property at least in the inner layer and having a barrier layer, and the bag-like body faces the inner layer surface of the film. It is a tube container characterized by being overlap | superposed and heat-sealing the peripheral part.

  Further, in the above, the tube container is composed of a laminate in which a surface resin layer made of a heat seal layer, a barrier intermediate layer, and an inner surface resin layer made of a heat seal layer are sequentially laminated. It is a container.

  In the tube container according to the present invention, the bag-like body is formed by engraving an opening cut.

The tube container of the present invention is configured as described above, so that oxygen can be prevented from entering the tube container body from the vicinity of the mouth of the tube container body, and the contents are oxidized by oxygen gas. Even when it contains a substance that easily discolors, it has the advantage of excellent storage stability.
Furthermore, since it is possible to absorb oxygen in the bag-like body by covering the spout with the oxygen scavenger enclosed in the bag-like body, the effect of preventing oxidation of the contents is improved. be able to.

FIG. 1 is a plan view showing an embodiment of a tube container 10 covered with a bag-like body 20 according to the present invention, and FIG. 2 is a cross-sectional view showing an embodiment of a layer structure of the bag-like body 20 according to the present invention. FIG. 3 is a cross-sectional view showing an embodiment of the layer configuration of the tube container body 10 according to the present invention.
As shown in FIG. 1, a tube container 10 covered with a bag-like body according to the present invention has a tube container 10 with a cap 2 attached to the mouth, and a bag-like body that covers the mouth 8 side of the tube container 10. 20, and the bag-like body 20 is integrated by heat sealing 28 in the body 4 of the tube container body 10.

As shown in FIG. 2, the layer structure of the bag-like body 20 according to the present invention is basically a three-layer laminate in which a gas barrier layer as an intermediate layer 34 is laminated between an outer layer 32 and an inner layer 36. Composed.
In particular, the inner layer 36 of the bag-shaped body 20 is made of the same material as the resin constituting the resin of the surface resin layer 42 of the tube container body 10, so that the adhesive strength between the bag-shaped body 20 and the tube container body 10 is high. Therefore, it is preferable.

As shown in FIG. 3, the layer structure of the tube container body 10 according to the present invention includes a structure in which at least a surface resin layer 42, an intermediate layer 44, and an inner surface resin layer 46 are sequentially laminated from the outside. Is the basic structure.
As the intermediate layer 44, a base film layer or a gas barrier layer can be used.
Furthermore, the base film layer constituting the intermediate layer 44 can be formed with printing layers such as letters, figures, symbols, and patterns on one side or both sides.
Furthermore, as the gas barrier layer, either a metal vapor deposition film or a metal oxide vapor deposition film can be formed on the base film layer.
And the laminated body illustrated above illustrates the few, and this invention is not limited to the laminated film which consists of a structure illustrated above, The laminated material of a various form is used. be able to. For example, although not shown, a layer made of another material can be provided between each layer depending on the use, contents to be filled, etc., and the stacking order can be arbitrarily stacked. is there.

In the present invention, the laminated material 30 forming the tube container shown in FIG. 3 is rolled up, and the surface resin layer 42 surface that is the outermost layer at both ends of the laminated material 30 and the inner surface resin layer 46 surface that is the innermost layer. And the overlapping end portions are welded to form the heat seal portion 14 to form the cylindrical body portion 4.
Next, in the present invention, a head portion 18 including a shoulder portion 6 and a mouth portion 8 constituting a tube container is formed on the upper portion of one opening portion of the cylindrical body portion 4 according to a conventional method.
And in this invention, as shown in said FIG. 1, the cap 2 which seals is attached to the opening part 8 of the head 18 formed above, and the tube container 10 concerning this invention is manufactured.
In addition, the tube container 10 manufactured above is filled and packaged with an appropriate amount of the content 16 from the other opening of the cylindrical body 4, and then the opening is welded to form the bottom seal portion 12. Thus, the packaged product A filled and packaged with the contents 16 can be manufactured.
In addition, the example given above is merely an example of the tube container of the present invention, and the present invention is not limited thereby.

Next, in the present invention, the material constituting the laminated material 30 as described above will be described.
First, in the present invention, as the material constituting the surface resin layer 42 and the inner surface resin layer 46, as described above, the laminated body 30 is rolled and its polymerization end is welded to manufacture the cylindrical body 4. Therefore, it is preferable to use a resin having heat sealability that can be melted by heating and fused to each other. And since the material which comprises the surface resin layer 42 and the inner surface resin layer 46 consists of the same material, since heat seal property can be improved, it is preferable.
Further, the surface resin layer 42 needs to be transparent so that a printed layer formed on the intermediate layer can be seen.
Specifically, examples of the resin having the heat sealing property include low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, and ethylene polymerized using a metallocene catalyst. -Α-olefin copolymer, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid Use unsaturated carboxylic acid for polyolefin resin such as methyl copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, polyethylene or polypropylene Acid-modified polyolefin Fin resins, polyvinyl acetate resins, poly (meth) acrylic resin, polyvinyl chloride resin, may be a resin other like.
The resin having the heat sealability can be used, for example, in the form of a film or sheet, or a coating film made of a composition containing the resin.
The thickness of the film or film or sheet is about 10 μm to 200 μm, preferably about 15 μm to 100 μm.

  Next, in the surface resin layer 42 and the inner surface resin layer 46 of the present invention, when a functional resin layer is formed by laminating multiple heat seal layers, the materials include barrier properties against oxygen gas, water vapor, and the like. / Or a resin that has little adsorption of perfume ingredients, etc. contained in the contents to be packed and packed, has excellent scent retention properties, and does not cause a change in taste or odor, and can be extruded. Can be used. Specifically, for example, polyacrylic resin, polymethacrylic resin, polyacrylonitrile resin, polymethacrylonitrile resin, polystyrene resin, polycarbonate resin, polyethylene terephthalate resin or its ethylene component and / or terephthalate component A resin obtained by copolymerizing or modifying a part of the resin with another di- or higher polyhydric alcohol component or dicarboxylic acid component, or a polyester resin such as polyethylene naphthalate resin, a polyamide resin, or an ethylene-vinyl acetate copolymer. Resins such as saponified products, polyvinyl alcohol resins, polyvinyl chloride resins, polyvinylidene chloride resins, and the like can be used. Thus, in the present invention, among the above resins, it is desirable to use a resin having a fragrance retention property and a barrier property against oxygen gas or water vapor. Specifically, for example, ethylene-vinyl acetate is used. It is desirable to use a saponified copolymer, a polyamide-based resin, a polyacrylonitrile-based resin, a polyester-based resin, or the like, which is rich in aroma retention and barrier properties.

Next, in the present invention, a manufacturing method in which one or more of the above-described various resins are used and the surface resin layer 42 and the inner surface resin layer 46 are formed in the intermediate layer will be described. A laminate forming film forming method, a T die cast forming film forming method, or the like can be employed.
Specifically, a method for forming a film of the above-mentioned various resins independently by using a T-die cast molding method such as a feed block method or a multi-manifold method, or a molding method such as an extrusion laminate molding film forming method. Alternatively, a method of forming a multi-layer coextrusion film using two or more kinds of resins, and a method of forming a film by mixing two or more kinds of resins before forming the film, etc. Thus, the surface resin layer 42 and the inner surface resin layer 46 according to the present invention can be manufactured.

In the tube container 10 of the present invention, the intermediate layer 44 needs to be composed of a base film layer and a barrier layer.
First, as a material of the base film layer constituting the intermediate layer 44, for example, as a basic material constituting a tube container, it has excellent properties in mechanical, physical, chemical, etc. It is possible to use a resin film or sheet that is tough and has heat resistance.
Specifically, for example, a polyester resin, polyamide resin, polyaramid resin, polyolefin resin, polycarbonate resin, polyacetal resin, fluorine resin, or other tough resin film or sheet, etc. are used. can do.
And as said resin film thru | or sheet | seat, any things, such as an unstretched film or the stretched film extended | stretched to the uniaxial direction or the biaxial direction, can be used.
The thickness of the film is about 5 μm to 100 μm, preferably about 10 μm to 50 μm.

Next, in the present invention, as the material for the base film layer constituting the intermediate layer 44, for example, various paper base materials constituting the paper layer can be used. In the present invention, the paper base material has formability, bending resistance, rigidity, etc., for example, a paper base material having a strong sizing property or unbleached, or pure white roll paper, kraft paper, paperboard Paper base materials such as processed paper, and the like can be used.
In the present invention, a paper base material constituting the paper layer and various resin films or sheets as the base film mentioned above can be used in combination.

  Next, in the present invention, on one side or both sides of the base film layer constituting the intermediate layer 44 as described above, a printing method such as a gravure printing method, a flexographic printing method, etc., for example, characters, figures, symbols, pictures A desired pattern printing layer such as a pattern can be formed.

Furthermore, in the present invention, as the material of the barrier layer constituting the intermediate layer 44, for example, a barrier material against oxygen gas, water vapor, etc., a barrier material having a light-shielding property against sunlight, etc., or contents It is possible to use a barrier material or the like having a fragrance-retaining property.
Specifically, as the barrier material, for example, a metal foil or a resin film having a metal vapor deposition layer, an inorganic oxide vapor deposition layer, or a metal oxide vapor deposition layer can be used. As the barrier material, a coating film made of a barrier resin can be used. In particular, it is either a metal vapor-deposited film or a metal oxide vapor-deposited film that has excellent barrier properties such as oxygen gas, water vapor, light-shielding properties, and fragrance retention, and is environmentally friendly in terms of disposal of containers. This is preferable.
Specifically, as the barrier material, an aluminum foil, a metal such as aluminum, a ceramic such as silica or alumina, can be used by forming a vapor deposition film on a plastic film such as a PET film.
In addition to these, indium tin oxide (ITO), metal oxides such as zinc, tin, titanium, zirconium, vanadium, barium, chromium, silicon nitride, silicon carbide, and the like can be used as the ceramic. These materials can be used alone or in combination.
In the above, it is preferable to use an aluminum foil having a thickness of about 5 μm to 30 μm, and a metal, metal oxide, or inorganic oxide deposited film having a thickness of about 50 mm to 3000 mm. 100 to 1000 mm is desirable.
As the metal, metal oxide, or inorganic oxide to be used, it is also possible to use one kind or a mixture of two or more kinds to form a vapor-deposited film of an inorganic oxide mixed with different materials.

The resin film that supports the above-mentioned vapor-deposited film has an excellent property in mechanical, physical, chemical, etc. because it is provided with a vapor-deposited layer, and is particularly strong and tough. In addition, a heat-resistant resin film or sheet can be used.
Specifically, in the present invention, examples of the resin film that supports the vapor deposition film include polyester resin films such as polyethylene terephthalate, polyamide resin films such as various nylons, polyethylene resins, and polypropylene resins. , Cyclic polyolefin resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyolefin film such as polybutene resin film, polyvinyl chloride resin, polycarbonate resin , Polyimide resin, polyamideimide resin, polyaryl phthalate resin, silicone resin, polysulfone resin, polyphenylene sulfide resin, polyethersulfone resin, polyurethane resin, cellulose Scan-based resins, poly (meth) acrylic resins, polyvinylidene chloride film, acetal resin film, fluorine-based resin, it is possible to use other like. In the present invention, it is particularly preferable to use a film or sheet of polypropylene resin, polyester resin, or polyamide resin.

Next, in the present invention, a method for forming a deposited film constituting the barrier layer will be described. As such a method, the above metal or metal oxide is used as a raw material, for example, a vacuum deposition method, a sputtering method, Chemical vapor deposition (physical vapor deposition, PVD) such as ion plating or cluster ion beam, or chemical vapor deposition such as plasma chemical vapor deposition, thermal chemical vapor deposition, or photochemical vapor deposition A vapor deposition thin film can be formed on a resin film by using a phase growth method (Chemical Vapor Deposition method, CVD method) or the like.
More specifically, in the above PVD method, for example, using a wind-up type vapor deposition machine, the resin film that has come out of the unwinding roll is put into the vapor deposition chamber in a vacuum chamber, where: The evaporation source heated by the crucible is evaporated, and if necessary, an evaporation film is formed through a mask on the resin film on the cooled coating drum while oxygen is blown out from the oxygen outlet. Then, a resin film having a vapor deposition thin film according to the present invention can be produced by winding the resin film on which the vapor deposition thin film is formed on a winding roll.
On the other hand, in the above-described CVD method, the film surface of the resin fed from the unwinding roll disposed in the vapor deposition chamber is cooled from the vapor deposition chamber and supplied from the vapor deposition raw material volatilization supply device on the peripheral surface of the electrode drum. A resin film in which a vapor-deposited thin film of silicon oxide is formed by plasma can be manufactured by introducing a mixed gas composed of an organosilicon compound, oxygen gas, and inert gas as a monomer gas. And in this invention, in the resin film which has the above-mentioned vapor deposition thin film of inorganic oxides, oxygen gas, water vapor | steam, etc. are blocked | prevented, and there exists a function as a barrier layer with respect to these. is there.

  In the above, the thickness of the vapor-deposited thin film of metal oxide or inorganic oxide is usually preferably about 50 to 3000 mm in order to obtain a sufficient barrier property. In particular, in the present invention, 100 to 2000 mm. The position is desirable. More specifically, in the PVD method, the film thickness of the aluminum oxide vapor-deposited thin film is about 200 to 1000 mm, preferably about 300 to 500 mm. In the CVD method, silicon oxide is vapor-deposited. The thickness of the thin film is about 50 to 500 mm, preferably about 100 to 300 mm. In the above, generally, when the thickness of the inorganic oxide vapor-deposited thin film exceeds 2000 mm, the metal oxide and the inorganic oxide vapor-deposited thin film are liable to crack, and the barrier property is lowered due to the warpage. It is not preferable because it is problematic and the material cost is high, and if it is less than 100 mm, it is not preferable because it becomes difficult to perform its function.

  In the present invention, examples of the barrier material or the material having aroma retaining property include, for example, polyvinylidene chloride resin, polyester resin, polyamide resin, ethylene-vinyl acetate copolymer (vinyl acetate is used). A film or sheet of a resin having a high gas barrier property such as ethylene-vinyl alcohol copolymer, polyvinyl alcohol, polyacrylonitrile, etc. having an ethylene content of 25 mol% to 50 mol%, which is completely saponified (approximately 79 wt% to 92 wt%) Alternatively, a coating film can be used.

Next, in the present invention, as the material constituting the intermediate layer 44, for example, a light-shielding material having a property of shielding light such as sunlight can be used, and this may be a single base material. Or the composite base material etc. which combined 2 or more types of base materials may be sufficient.
As the light-shielding material, for example, it is preferable to use an aluminum foil having a thickness of about 5 μm to 30 μm, and a vapor deposition film of a metal such as aluminum having a thickness of about 50 mm to 3000 mm, The range of 100 to 1000 mm is desirable.
In addition, as the light-shielding material, various color resin films or sheets having a light-shielding property formed by adding a colorant such as a pigment to the resin and further kneading and adding other desired additives. Can be used. These materials can be used alone or in combination. The thickness of the film or sheet is arbitrary, but is usually about 5 μm to 300 μm, more preferably about 10 μm to 100 μm.

  By the way, since the tube container 10 is usually subjected to severe physical and chemical conditions, the laminate material constituting the container is required to have strict packaging suitability, deformation prevention strength, drop impact strength. Various conditions such as pinhole resistance, heat resistance, sealability, quality maintenance, workability, hygiene, etc. are required. For this reason, in the present invention, in addition to the above materials, Other materials satisfying the above conditions can be arbitrarily used. Specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene- Propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid or methacrylic acid copolymer Methylpentene polymer, polybutene resin, polyvinyl chloride resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride-vinylidene chloride copolymer, poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene Resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyester resin, polyamide resin, polycarbonate resin, polyvinyl alcohol resin, ethylene-vinyl acetate A saponified copolymer, a fluororesin, a diene resin, a polyacetal resin, a polyurethane resin, a nitrocellulose, and other known resin films or sheets can be arbitrarily selected and used. In addition, for example, a film such as cellophane, synthetic paper, and the like can be used. In the present invention, the film or sheet may be any of unstretched and uniaxially or biaxially stretched. Moreover, although the thickness is arbitrary, it can select and use from the range of several micrometers-about 300 micrometers. Furthermore, in the present invention, the film or sheet may be a film having any property such as extrusion film formation, inflation film formation, and coating film.

Next, in the above-described present invention, a method for producing the laminated material 30 for forming the tube container according to the present invention using the above-described material will be described. As such a method, a normal packaging material is produced. Laminating method used when performing, for example, wet lamination method, dry lamination method, solventless dry lamination method, extrusion lamination method, T-die coextrusion molding method, coextrusion lamination method, inflation method, etc. Can be done by the method.
In the present invention, when performing the above-described lamination, if necessary, pretreatment such as corona treatment and ozone treatment can be applied to the film. For example, isocyanate (urethane), polyethylene Anchor coating agents such as imine-based, polybutadiene-based, organic titanium-based anchor coating agents, or polyurethane-based, polyacrylic-based, polyester-based, epoxy-based, polyvinyl acetate-based, cellulose-based and other adhesives for laminates, An adhesive or the like can be arbitrarily used.

  By the way, in the manufacturing method of the laminated material 30 as described above, as the extrusion resin constituting the adhesive resin layer at the time of extrusion lamination, for example, polyethylene, ethylene-α-olefin copolymer, polypropylene, polybutene, polyisobutene, Copolymers of ethylene and unsaturated carboxylic acid, such as poisobutylene, polybutadiene, polyisoprene, ethylene-methacrylic acid copolymer, or ethylene-acrylic acid copolymer, or acid-modified polyolefin resins obtained by modifying them, ethylene -Ethyl acrylate copolymer, ionomer resin, ethylene-vinyl acetate copolymer, etc. can be used. In the present invention, the adhesive constituting the adhesive layer when dry laminating is specifically a two-component curable urethane adhesive, polyester urethane adhesive, Ether urethane adhesives, acrylic adhesives, polyester adhesives, polyamide adhesives, polyvinyl acetate adhesives, epoxy adhesives, rubber adhesives, and the like can be used.

  Next, in the present invention, when manufacturing the tube container 10 according to the present invention, for example, as a method of heat sealing when manufacturing the cylindrical body portion, for example, a bar seal, a rotary roll seal, a belt seal, It can be performed by methods such as impulse sealing, high frequency sealing, ultrasonic sealing, flame sealing, and the like.

Next, in the present invention, the laminated material 30 forming the tube container manufactured as described above is used, and first, the cylindrical body 4 constituting the tube container is manufactured by rolling it and welding its polymerization end. Next, above the cylindrical body portion 4, for example, a high-density polyethylene or the like is molded and welded by an injection molding method, a compression molding method, or other molding methods, and the head portion including the shoulder portion 6, the mouth portion 8, etc. The tube container 10 according to the present invention can be manufactured by forming and then attaching the cap 2 to the mouth portion 8 constituting the head portion.
In the present invention, the contents to be filled and packed are filled from the opening at the lower end of the tube container manufactured as described above, and then the opening is heat-sealed to form the bottom seal portion 12. Can be manufactured.
In the above, as a material constituting the head portion 18 including the shoulder portion 6 and the mouth portion 8 of the tube container, in addition to the high-density polyethylene as described above, ethylene-α polymerized using the above-described metallocene catalyst. -Olefin copolymers can also be used.

  The heat-sealable resin used as the inner layer 36 constituting the bag-like body 20 according to the present invention may be any resin that can be melted by heat and fused to each other. For example, low density polyethylene, medium density polyethylene , High density polyethylene, linear (linear) low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer, ethylene-methacrylic acid A resin composed of one or more resins such as a copolymer and an ethylene-propylene copolymer or a sheet obtained by forming a film of these resins can be used, and the thickness is suitably 30 to 200 μm.

In addition, as a synthetic resin film used as the outer layer 32 constituting the bag-like body 20 according to the present invention, since it becomes a basic material constituting the bag-like body 20, mechanical, physical, chemical, etc. A synthetic resin having excellent properties can be used. For example, a polyester resin, a polyamide resin, a polypropylene resin, a polycarbonate resin, a polyacetal resin, or the like can be used. In addition, as a film using these resins, any of an unstretched film or a stretched film stretched in a uniaxial direction or a biaxial direction can be used. It is sufficient that the thickness and thickness of the material can be kept to the minimum necessary. If it is too thick, laser processing defects etc. will occur, tearing will be reduced, and there will be a disadvantage that the cost will increase, and it will be too thin. And, since strength, rigidity, etc. fall, it is not preferable. In the present invention, about 12 to 25 μm is appropriate for the reasons described above.
In addition, the synthetic resin film was formed with a film coated with polyvinylidene chloride as needed, or an inorganic vapor deposition layer such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, or zirconium oxide. The film may have a barrier property.
Moreover, the synthetic resin film used as the outer layer is generally often printed on the inner layer side of the synthetic resin film. Therefore, the synthetic resin film used as the outer layer is required to have printability and is preferably a stretched film stretched in a uniaxial direction or a biaxial direction.

Further, in the present invention, an intermediate layer 34 may be provided between the inner layer 36 and the outer layer 32 of the bag-shaped body 20, and the intermediate layer 34 is sufficient to function as a bag-shaped body with the inner layer 36 and the outer layer 32 alone. It is provided when it cannot be fulfilled.
The above functions include gas barrier properties, mechanical toughness, flex resistance, puncture resistance, impact resistance, wear resistance, cold resistance, heat resistance, chemical resistance, etc., which are required as packaging bags. These final functions are achieved by providing the intermediate layer 34.
Examples of the base material used as the intermediate layer 34 include metal foils such as aluminum, iron, copper, and tin, polyolefins such as polyethylene terephthalate, polyamide, polyethylene, and polypropylene, polyvinyl chloride, polycarbonate, polyvinyl alcohol, Films of saponified ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, etc. or films coated with polyvinylidene chloride on these, or inorganic materials such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, zirconium oxide Or a film made of polyvinylidene chloride or the like can be used.
One or more of these substrates can be used in combination. Note that the thickness of the base material only needs to satisfy a function required for a packaging bag, and can be appropriately selected as necessary.

  General additives for the above-mentioned resins include, for example, lubricants, crosslinking agents, antioxidants, ultraviolet absorbers, light stabilizers, fillers, antistatic agents, antiblocking agents, dyes, pigments and the like. An agent, etc. can be used, and a modifying resin or the like can also be used.

As a method of laminating the outer layer 32, the intermediate layer 34, and the inner layer 36 of the bag-like body, each layer may be extruded and co-extruded and laminated, or a thermoadhesive resin is used between the layers to improve interlayer adhesion. Lamination may be performed by a die extrusion lamination method, or may be performed by a dry lamination method using a two-component curable urethane adhesive.
In the case of the T-die extrusion lamination method, an anchor coating agent can be used as necessary.
Moreover, a thermal lamination method can also be used as a deformation | transformation means of a T-die extrusion lamination method, and a heat seal may be used for lamination | stacking of the films which have heat sealing property.
As a heat sealing method, for example, a well-known method such as a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, and an ultrasonic seal can be used. The heat seal portion may be provided with a V-notch for opening and an I-notch as easy-opening means.

By covering the bag-like body 20 according to the present invention over the head portion 18 of the tube container main body 10, it is possible to directly touch the hand without foreign matter adhering to the head portion 18 of the tube container 10 in the manufacturing process or the distribution process. It can be handled without any problem, and can be reliably prevented from being contaminated at the tip of the mouth portion 8 of the tube container during distribution and storage, and has the advantage of excellent hygiene.
In addition, by using a laminated film having a barrier layer as the packaging material of the bag-like body 20, the content covered by the tube container 10 contains a substance that is easily oxidized or discolored by oxygen gas. Even if it has, it has the advantage that it is excellent in storage stability.
The bag-like body may be stored and distributed together with the oxygen scavenger 26 for the purpose of further improving gas barrier properties.

Next, the present invention will be described more specifically with reference to examples.
(Manufacture of tube container 10)
A printing layer using a polyurethane gravure ink was formed on a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm to obtain a biaxially stretched polyethylene terephthalate film having a pattern printing layer.
Subsequently, the biaxially stretched polyethylene terephthalate film and an aluminum foil having a thickness of 9 μm are laminated via an adhesive (two-component curable urethane adhesive layer) to form a layer structure, a biaxially stretched polyethylene terephthalate film (12 μm). ) / Image printing layer / adhesive layer / aluminum foil (9 μm).
Next, a corona-treated linear shape having a thickness of 170 μm is formed on the intermediate layer as a surface resin layer and an inner surface resin layer through a polyurethane adhesive (coating amount: 4 g / m ² ) by a roll coating method. A low density polyethylene film was laminated on both sides. As a result, from the front side to the back side, the layer structure, linear low density polyethylene layer / adhesive layer / biaxially stretched polyethylene terephthalate film / pattern printing layer / adhesive layer / aluminum foil / adhesive layer / A laminated film composed of a laminated structure of linear low-density polyethylene layers is formed into a cylindrical shape by superimposing one side part and the other side part using a mandrel, and the back surface of the laminated film in the overlapping part The cylindrical molded body was obtained by welding the layer and the surface layer by a thermal welding method.
Subsequently, a linear low-density polyethylene resin (product name “Kernel KF280”, manufacturer “Nippon Polychem Co., Ltd.”) having a density of 0.918 g / cm ³ and a melt index of 2 g / 10 min is used on one of the cylindrical molded bodies. Then, the laminate tube container according to Example 1 as shown in FIG. 1 was obtained by molding and joining the shoulder portion to the mouth neck portion by compression molding.
On the other hand, a screw cap molded using polypropylene resin was prepared. A screw cap was spiraled around the mouth and neck of the molded tube container body.
(Manufacture of bag-like body 20)
On the other hand, the packaging material constituting the bag-like body 20 according to the present invention is, in order from the outside, an outer layer made of a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm, an intermediate layer made of an aluminum foil having a thickness of 9 μm, and a wire having a thickness of 80 μm. And an inner layer made of a low-density polyethylene film are laminated via an adhesive (two-component curable urethane adhesive layer) to form a layer structure, biaxially stretched polyethylene terephthalate film (12 μm) / adhesive layer / aluminum foil A laminated film consisting of (9 μm) / adhesive layer / linear low density polyethylene film (60 μm) was produced.
Two laminated films (85 mm long × 150 mm wide) obtained above were cut. Thereafter, the linear low density polyethylene film layers are opposed to each other, two laminated films are overlapped, three sides are heat-sealed with a seal width of 5 mm, leaving the upper end, and the bag-like body 20 having an opening at the upper end. Was made.
(Manufacture of tube container 10 equipped with bag-like body 20)
Using the bag-like body 20 obtained above, the oxygen scavenger 26 is accommodated in the bag-like body 20, and the mandrel used for head molding is removed from the tube body 10 with the cap 2 attached to the head 18. The bag-shaped body 20 containing the oxygen scavenger 26 is covered with the head 18 side of the tube main body 10, and the opening of the bag-shaped body 20 is opened with the air in the bag-shaped body 20 removed as much as possible. Using a downward arc, 100 ° inside angle, 5mm seal width, attached to a manual tray sealer, the tube body 10 is rotated little by little to change the heat seal position each time heat sealing is performed. As a result of forming a heat seal portion 28 and sealing it by heat-sealing immediately below the shoulder portion 6 of the body portion 10 of FIG. 10, a tube container 10 equipped with the bag-like body 20 according to the present invention shown in FIG. 1 was obtained. .
(Filling contents)
Next, the tube container 10 equipped with the bag-like body 20 was removed from the mandrel and placed inside a glove box in which the inside was replaced with nitrogen gas.
Thereafter, 100 g of commercially available viscous liquid butter is filled from the other opening of the tube container 10 in the glove box substituted with nitrogen gas, and then the opening of the tube container 10 is filled in the glove box substituted with nitrogen gas. After heat-sealing using a small impulse sealer with a seal width of 2 mm, it was removed from the glove box and sealed by reheat-sealing with a seal width of 5 mm over the 2 mm-wide heat seal part using an impulse sealer of a double-sided heater. .
The tube container 10 to which the bag-like body 20 according to the present invention obtained above is attached covers the head 18 side of the tube container 10 with the bag-like body 20 until the contents 16 are taken out. This is an excellent tube container that can reliably prevent contamination of the tip of the mouth part of the tube container during distribution and storage without any foreign matter adhering to the mouth part 8 of the tube container.
Moreover, by giving oxygen barrier property to the packaging material which comprises a bag-like body, it can suppress that oxygen penetrate | invades into the tube container 10 at the head 18, and the content 16 with which the tube container 10 is filled is provided. Even when it contains a substance that is easily oxidized or discolored by oxygen gas, it has excellent storage stability.

(Manufacture of tube container 10)
Layer configuration, linear low-density polyethylene layer / adhesive layer / biaxially stretched polyethylene terephthalate film / pattern printing layer / adhesive layer / aluminum foil / adhesive layer / line consisting of the same layer configuration as in Example 1. A laminated film comprising a laminated structure of a low-density polyethylene layer is formed into a cylindrical shape by superimposing one side part and the other side part using a mandrel, and the back layer of the laminated film in the overlapping part And a surface layer were welded by a heat welding method to obtain a cylindrical molded body.
Subsequently, one of the cylindrical molded bodies is molded and joined from the shoulder to the head by the compression molding method using the same linear low-density polyethylene resin as in Example 1, and is shown in FIG. Thus, a laminated tube container according to Example 2 was obtained.
On the other hand, a screw cap molded using the same polypropylene resin as in Example 1 was prepared, and the screw cap was spiraled around the mouth and neck of the molded tube container body.
(Manufacture of bag-like body 20)
On the other hand, the packaging material constituting the bag-like body 20 according to the present invention includes an outer layer made of a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm and a silica-deposited polyethylene terephthalate film having a thickness of 12 μm (Mitsubishi Kasei Polytech Co., Ltd.). ): After laminating the non-silica vapor-deposited surface of the intermediate layer made of tech barrier H) by a dry laminating method via a two-component curable urethane adhesive, the intermediate layer is deposited with a silica vapor-deposited surface and a 80 μm thick linear The inner layer made of a low-density polyethylene film is laminated by a dry laminating method through a two-component curable urethane adhesive to form a layer structure, biaxially stretched polyethylene terephthalate film (12 μm) / adhesive layer / polyethylene terephthalate film (12 μm). ) / Silica vapor deposition layer / adhesive layer / linear low density polyethylene film ( A laminated film comprising 80 μm) was produced.
Two laminated films (85 mm long × 150 mm wide) obtained above were cut. After that, the linear low density polyethylene film layer is opposed to each other, two laminated films are superposed, the upper end is left and the three sides are heat-sealed with a seal width of 5 mm, and an opening is formed at the upper end. A bag-like body 20 was produced.
(Manufacture of tube container 10 equipped with bag-like body 20)
Using the bag-like body 20 obtained above, the oxygen scavenger 26 is accommodated in the bag-like body 20, and the mandrel used for head molding is removed from the tube body 10 with the cap 2 attached to the mouth portion 8. The mouth portion 8 side of the tube body 10 is covered with the bag-like body 20 containing the oxygen scavenger 26, and the opening of the bag-like body 20 is opened with the air in the bag-like body 20 removed as much as possible. Using a downward arc type, 100 ° inner angle, 5mm seal width seal head mounted on a manual tray sealer, the tube body 10 is rotated little by little to change the heat seal position each time heat sealing is performed. As a result of heat sealing the body portion 4 of the main body 10 immediately below the shoulder portion 6 to form a heat seal portion 28 and sealing it, a tube container 10 equipped with the bag-like body 20 according to the present invention shown in FIG. 1 is obtained. It was.
(Filling contents)
Next, the main body of the tube container 10 equipped with the bag-like body 20 was removed from the mandrel, and placed inside a glove box in which the inside was replaced with nitrogen gas. Thereafter, 100 g of a commercially available viscous liquid butter is filled from the other opening of the tube container 10 in the glove box replaced with nitrogen gas, and then the opening of the tube container 10 is sealed in the glove box replaced with nitrogen gas. After heat-sealing using a small impulse sealer with a width of 2 mm, it was removed from the glove box and sealed by reheat-sealing with a seal width of 5 mm over the heat-sealing part with a width of 2 mm using an impulse sealer of a double-sided heater.
The tube container 10 equipped with the bag-like body 20 according to the present invention obtained above is coated with the bag-like body 20 by covering the portion on the head 18 side of the tube container 10 until the contents 16 are taken out. The foreign substance does not adhere to the mouth part 8 of the container 10, and it is possible to reliably prevent contamination at the tip of the mouth part 8 of the tube container 10 during distribution and storage. It is an excellent tube container 10 that can be visually recognized.
Further, by providing the laminated material 30 constituting the bag-like body 20 with an oxygen barrier property, oxygen can be prevented from entering the tube container 10 into the head 18, and the contents filled in the tube container 10. Even when No. 16 contains a substance that is easily oxidized or discolored by oxygen gas, it was excellent in storage stability.

[Comparative Example 1]
In Example 2, the tube container 10 which concerns on the comparative example 1 was obtained with the material and manufacturing method similar to Example 2 except not using the bag-shaped body 20. FIG.
For the tube container 10, a screw cap 2 molded using the same material and molding method as in Example 2 was prepared, and the screw cap 2 was spirally wound on the mouth 8 of the molded tube container main body 10. . Thereafter, from the other opening of the tube container 10 main body, 100 g of commercially available viscous liquid butter was filled in a glove box substituted with nitrogen gas, and then the cylindrical molding was performed in the same manner as in Example 2. The body opening was heat sealed inside and outside the glove box to form the bottom seal 12.

[Oxygen intrusion position measurement]
About the tube container 10 obtained in Example 1, 2, and the comparative example 1, 2 weight% agar solution (methylene blue and hydrosulfite sodium were added as content from the other opening part of the said cylindrical molded object ( 100 g) was filled in a glove box substituted with nitrogen gas, and the opening of the cylindrical molded body was heat-sealed inside and outside the glove box in the same manner as in Example 2 to form the bottom seal portion 12. Thereafter, the tube was stored at 40 ° C. for 3 weeks, and the tube container 10 main body was cut open and inspected for the location where oxygen entered the tube container 10 and turned blue.

In the tube containers 10 of Examples 1 and 2, no color was observed on the agar as the contents.
From the above results, it was confirmed that the tube containers 10 of Examples 1 and 2 improved the oxygen barrier property and prevented discoloration and alteration of the contents due to oxygen gas.
On the other hand, in the tube container 10 of the comparative example 1, the agar changed to methylene blue blue due to oxygen permeation in the head 18. From this, in the tube container of the comparative example 1, oxygen gas osmose | permeated over the head 18, and the content 16 discolored and there existed a problem.

  Applications of the tube container 10 covered with the bag-like body 20 according to the present invention include various viscous properties such as toothpaste, cosmetics, glue, paste, kneaded wasabi, cream, paint, ointment, pharmaceuticals, etc. It can be used as a container for filling and packaging articles made of a body, and is not particularly limited.

It is a top view which shows the Example of the tube container coat | covered with the bag-shaped body 20 which concerns on this invention. It is sectional drawing which shows the Example of the layer structure of the bag-shaped body which concerns on this invention. It is sectional drawing which shows the Example of the layer structure of the tube container main body which concerns on this invention.

Explanation of symbols

2 Cap 4 Cylindrical trunk portion 6 Shoulder portion 8 Mouth portion 10 Tube container 12 Bottom seal portion 14, 24, 28 Heat seal portion 16 Contents 18 Head portion 20 Bag-shaped body 22 Opening notch 26 Deoxidizer 30 Laminating material 32 Outer layer 34 Intermediate layer 36 Inner layer 42 Surface resin layer 44 Intermediate layer 46 Inner surface resin layer

Claims (3)

In the tube container in which the cap is detachably attached to one end of the tube body, and the other end of the tube body is closed by thermal bonding,
The bag-like body is thermally bonded to the body portion of the tube body, and the mouth side of the tube body with the cap attached to the mouth portion is covered,
The film constituting the bag-like body is composed of a resin having a heat-sealing property in at least the inner layer, and a film having a barrier layer,
And the said bag-like body makes the surface of the inner layer of the said film face each other, overlaps, and heat seals the peripheral part, The tube container characterized by the above-mentioned.   2. The tube according to claim 1, wherein the tube container comprises a laminate in which a surface resin layer made of a heat seal layer, a barrier intermediate layer, and an inner surface resin layer made of a heat seal layer are sequentially laminated. container. The tube container according to any one of claims 1 to 2, wherein an opening cut is formed in the bag-like body.

Images