JP6976032B2 - Tube container - Google Patents

Description

The present invention relates to a tube container, and more particularly to a tube container having excellent non-adsorptive property to the contents.

The tube container is a container composed of a spout portion, a shoulder portion, and a body portion, and is closed by sealing the bottom of the body portion. Traditionally, tube containers have been used as containers for accommodating foodstuffs, pharmaceuticals, cosmetics and the like. Such tube containers are made of a material that is non-adsorbent to the contents.

The tube container proposed by Patent Document 1 is a container for accommodating toothpaste. This tube container has an innermost layer made of an ethylene-vinyl alcohol copolymer having an ethylene content of 35 to 55 mol%, an adhesive resin layer made of a modified olefin resin, and a base material layer made of an olefin resin. I have. By configuring the layer structure of this tube container as described above, it is intended to obtain the effect of reducing the adsorption amount of L-menthol to 10 μg / piece or less.

The tube container proposed by Patent Document 2 is manufactured by extruding a tubular tube body. This tube container has a layer formed of a non-adsorbent resin in the innermost layer. Specifically, an acrylonitrile-based copolymer layer or an ethylene / vinyl alcohol copolymer layer is laminated as the innermost layer.

The squeeze container proposed by Patent Document 3 is a container formed by blow molding of a multi-layer parison and heat sealing at the bottom open end. In this squeezing container, a multi-layer parison is composed of an outer layer, an inner layer and an intermediate layer. The outer layer is formed of an olefin resin. The inner layer is a copolymerized polyester composed of a diol other than cyclohexanedimethanol and a dicarboxylic acid other than isophthalic acid, and the diol is composed of ethylene glycol and a diol other than ethylene glycol, and a diol other than ethylene glycol and ethylene glycol. It is formed of a substantially amorphous copolymerized polyester having a molar ratio of 50:50 to 95: 5. The intermediate layer is formed of an adhesive resin. In the squeezed container having such a layer structure, the inner layers of the bottom heat-sealed portion are fused to each other.

By providing the above-mentioned layer structure, this squeezing container is intended to have an effect of having non-adsorptive properties to active ingredients, fragrances and the like of contents such as pharmaceuticals and foods.

Japanese Unexamined Patent Publication No. 11-5721 Japanese Unexamined Patent Publication No. 9-132251 Japanese Unexamined Patent Publication No. 2002-96847

However, the tube container of Patent Document 1 is a tube container for the purpose of accommodating toothpaste, and the innermost layer thereof is composed of an ethylene-vinyl alcohol copolymer. In general, an ethylene-vinyl alcohol copolymer is a material mainly used when oxygen blocking property, oil resistance, and chemical resistance are required, and it cannot always be said that the copolymer is excellent in non-adsorption property. Therefore, the non-adsorptive property to substances other than L-menthol may not be sufficiently effective.

Further, the tube container of Patent Document 1 and Patent Document 2 and the squeeze container of Patent Document 3 described above are configured as an integral body by extruding and molding a resin between the injection port portion and the body portion. It cannot be manufactured with members made of different materials, and the degree of freedom in material selection is low.

The present invention has been made to solve the above problems, and an object of the present invention is to have excellent non-adsorptive property to the contents and gas barrier property, and the pouring unit and the body can be manufactured by different members. To provide a tube container.

The tube container according to the present invention for solving the above problems is composed of a pouring unit for pouring out the contents and a body portion welded to the pouring unit and for accommodating the contents. The dispensing unit includes a spout portion from which the contents are dispensed and a shoulder portion that juts out radially outward from the spout portion, and the body portion has one side of one side edge of the film on one side. The one side edge that is overlapped and overlapped with the other side edge of the other side edge is welded to the other side edge, and one end of the body portion in the axial direction is the outer periphery of the shoulder portion. It is welded to the surface, and the other end in the axial direction of the body portion is closed by welding the inner surfaces together or by welding the lid material, and the pouring unit and the lid material are at least the contents. The surface in contact with an object is formed of a resin containing a non-adsorbent resin, and the film constituting the body includes an inner layer made of a resin containing a non-adsorbent resin, an intermediate layer which is a gas barrier layer containing a gas barrier substance, and an intermediate layer. It is characterized by being composed of at least three layers of an outer layer made of a resin containing a non-adsorbent resin.

According to the present invention, when the pouring unit, the body portion, and the lid material are provided, the lid material is configured as described above, so that both can be manufactured with different members. Further, since the inner layer and the outer layer of the film constituting the body portion are composed of the resin containing the non-adsorptive resin and the intermediate layer is the gas barrier layer containing the gas barrier substance, the non-adsorptive property to the contents is satisfied. It can be a tube container having a gas barrier property. Therefore, the contents can be smoothly poured out, and the flavor and efficacy of the contents can be prevented from deteriorating.

In the tube container according to the present invention, the pouring unit is characterized by being a single layer made of a resin containing a non-adsorbent resin.

According to the present invention, since the injection unit is formed of a single layer made of a resin containing a non-adsorbent resin, the injection unit having non-adsorption property can be easily molded.

In the tube container according to the present invention, the pouring unit is composed of an inner layer made of a resin containing a non-adsorbent resin, an intermediate layer which is a gas barrier layer containing a gas barrier substance, and an outer layer made of a resin containing a non-adsorbent resin. It is characterized by having at least three layers.

According to the present invention, the injection unit consists of at least three layers: an inner layer made of a resin containing a non-adsorbent resin, an intermediate layer which is a gas barrier layer containing a gas barrier substance, and an outer layer made of a resin containing a non-adsorbent resin. Since it is formed, it can be a pouring unit having non-adsorption property and gas barrier property.

In the tube container according to the present invention, the gas barrier layer is characterized by being made of a metal foil, a metal-deposited film, or an inorganic-deposited film.

According to the present invention, since the gas barrier layer is made of a metal foil, a metal-deposited film, or an inorganic-deposited film, it is possible to make a tube container having non-adsorptive property to the contents and gas barrier property even in the body portion. Therefore, it is possible to prevent deterioration of the flavor and efficacy of the contents.

The tube container according to the present invention is characterized in that the film constituting the body portion has a resin layer containing at least one from a resin group consisting of a polyolefin, an adhesive resin, and a thermoplastic elastomer.

According to the present invention, since the film constituting the body has a resin layer containing at least one from the resin group consisting of polyolefin, adhesive resin, and thermoplastic elastomer, the body becomes flexible and the contents are contained. It is possible to improve the squeeze property of pouring out by extruding.

According to the present invention, it is possible to provide a new tube container which is excellent in non-adsorption property and gas barrier property to the tube container of the contents and can be manufactured by different members for the pouring unit and the body portion.

It is a side view which shows an example of the tube container of 1st Embodiment which concerns on this invention. It is a perspective view for demonstrating each part constituting the tube container of 1st Embodiment which concerns on this invention. It is a top view for demonstrating the structure of the body part. It is a schematic diagram which shows the laminated structure of the body part schematically. It is a top view which shows the example of the shape of the shoulder part of a pouring unit. It is a schematic diagram which shows the layer structure of a pouring unit schematically. It is a side view which shows an example of the tube container of 2nd Embodiment which concerns on this invention. It is a perspective view for demonstrating each part constituting the tube container of 2nd Embodiment which concerns on this invention.

Hereinafter, the tubular container according to the present invention will be described in detail with reference to the drawings. It should be noted that the present invention can be variously modified as long as it has its technical features, and is not limited to the embodiments specifically shown below.

[First Embodiment]
<Basic configuration of tube container>
As shown in FIGS. 1 and 2, the tube container 1 according to the present invention is composed of a pouring unit 20 for pouring out the contents and a body portion 10 welded to the pouring unit 20.

The dispensing unit 20 includes a spouting portion 21 from which the contents are poured out, and a shoulder portion 24 extending radially outward from the spouting port portion 21. On the other hand, the body portion 10 is formed by a tubular body 10a formed of the film 15. In the tubular body 10a configured as the body portion 10, one side end edge 15a of the film 15 is overlapped with the other side end 15d of the other side end edge 15b, and the overlapped one side end is overlapped. It is formed by welding the edge 15a and the other side edge 15b. The tubular body 10a is formed as a body portion 10 by welding one end in the axial direction to the outer peripheral surface 24a of the shoulder portion 24 and welding and closing the inner surfaces at the other ends in the axial direction together.

The film 15 constituting the body portion 10 has a multi-layer structure, and includes an inner layer 16, an intermediate layer 17, and an outer layer 18. The inner layer 16 and the outer layer 18 are each formed of a resin containing a non-adsorbent resin. The intermediate layer 17 between the inner layer 16 and the outer layer 18 is a gas barrier layer containing a gas barrier substance.

According to the above configuration, it is possible to provide a tube container 1 which is excellent in non-adsorptive property to the contents and gas barrier property and can manufacture the pouring unit 20 and the body portion 10 with different members. Can be done. The term "non-adsorptive" means that it is difficult to adsorb the active ingredient contained in the contents of foods, pharmaceuticals, cosmetics and the like. Further, the "gas barrier property" is a property that makes it difficult for a gas such as oxygen or water vapor to pass through.

Hereinafter, each configuration of the tube container 1 will be described in detail with reference to the drawings as appropriate. In the present specification, the "side edge" of the film 15 is a region between the side portion of the film 15 and the position inside by a certain distance L1 from the side portion, and forms the body portion 10. It is the part that is overlapped when doing. Further, the "inner surface" means a surface in contact with the contents.

(Torso)
The body portion 10 is made of a multi-layered film 15. As shown in FIGS. 2 and 3, the body portion 10 includes a back surface sealing portion 11 and a bottom surface sealing portion 12.

The back surface sealing portion 11 is a portion where the side edges 15a and 15b on both sides of the rectangular film 15 are overlapped and the overlapped side edges 15a and 15b are welded. Specifically, the back surface sealing portion 11 is a region of the rectangular film 15 from one side in the left-right direction to the position of length L1 and a region of the rectangular film 15 from the other side in the left-right direction to the position of length L1. Areas up to are overlapped. The superimposing form is a form in which the one-sided side 15c on one side edge 15a of the film 15 is overlapped with the other-sided side 15d on the other side edge 15b of the film 15.

In the bottom surface sealing portion 12, the region between the side of the film 15 and the position of the side to the position of the length L2 is overlapped on the other end portion in the axial direction of the tubular body 10a, that is, the bottom portion of the tube container 1. ing. The overlapping form is a form in which the inner surfaces of the films 15 are brought together. In FIG. 2, the portion of the reference numeral 12a is a sealing allowance in which the region having a length L2 from the lower end of the tubular body 10a is later configured as the bottom surface sealing portion 12.

The back surface sealing portion 11 and the bottom surface sealing portion 12 are formed by heat-sealing the overlapped portions. Examples of the heat seal include a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal and the like.

The film 15 constituting the body portion 10 is a film 15 having a multilayer structure as described above. FIG. 4 shows an example of the layer structure of the film 15, and the film 15 has a three-layer structure including an inner layer 16, an intermediate layer 17, and an outer layer 18. In addition, another layer may be provided between the inner layer and the intermediate layer, or between the intermediate layer and the outer layer.

The inner layer 16 constituting the inner surface side of the body portion 10 and the outer layer 18 constituting the outer surface side of the body portion 10 are each formed of a resin containing a non-adsorbent resin. In addition, "containing" means that other resins, additives and the like can be contained as necessary within a range that does not impair the non-adsorptive property. Other resins that can be included as needed include, for example, low-density polyethylene (hereinafter referred to as “LDPE”) contained for the purpose of improving weldability and flexibility, and linear low-density polyethylene (hereinafter referred to as “LDPE”). Hereinafter, it may be referred to as “L-LDPE”) and the like. Examples of the additive include antioxidants, lubricants, antiblocking agents, flame retardants, ultraviolet absorbers, light stabilizers, antistatic agents, colorants and the like.

Examples of the non-adsorbent resin constituting the inner layer 16 and the outer layer 18 include a polyester resin and a cyclic polyolefin resin.

The polyester resin is not particularly limited as long as it can be used for the tube container 1, and for example, an acid component containing an aromatic dicarboxylic acid as a main component and a diol component containing an aliphatic diol (glycol) as a main component. Examples thereof include copolymers containing. In this copolymer, the acid component and the diol component are bonded by an ester bond. As a raw material for the acid component, an ester-forming derivative such as a lower alkyl ester (for example, methyl ester) or an acid halide can also be used.

Examples of the acid component include aromatic dicarboxylic acids, aliphatic dicarboxylic acids and tricarboxylic acids. Specifically, examples of the aromatic dicarboxylic acid include terephthalic acid, isophthalic acid, naphthalene-1,4-dicarboxylic acid, naphthalene-2,6-dicarboxylic acid and the like. Examples of the aliphatic dicarboxylic acid include adipic acid and sebacic acid.

Examples of the diol component include ethylene glycol, cyclohexanedimethanol, neopentyl glycol, bisphenol compound, or an ethylene oxide adduct thereof.

On the other hand, the cyclic polyolefin-based resin constituting the inner layer 16 and the outer layer 18 is not particularly limited as long as it can be used for the tube container 1. Examples of the cyclic polyolefin include polymers of various cyclic olefin monomers.

Examples of the cyclic olefin monomer include bicyclic cycloolefin, tricyclic cycloolefin, tetracyclic cycloolefin, and pentacyclic cycloolefin.

Examples of the bicyclic cycloolefin include norbornene, norbornene, methylnorbornene, dimethylnorbornene, ethylnorbornene, chlorinated norbornene, chloromethylnorbornene, trimethylsilylnorbornene, phenylnorbornene, cyanonorbornene, dicyanonorbornene, methoxycarbonylnorbornene, pyridylnorbornene, and nadic. Examples thereof include acid anhydride, nadic acid imide and the like.

Examples of the tricyclic cycloolefin include dicyclopentadiene, dihydrodicyclopentadiene and its alkyl, alkenyl, alkylidene, aryl substitutes and the like.

Examples of the tetracyclic cycloolefin include dimethanohexahydronaphthalene, dimethanooctahydronaphthalene and its alkyl, alkenyl, alkylidene, and aryl substituted products.

Examples of the pentacyclic cycloolefin include tricyclopentadiene and the like, and examples of the hexacyclic cycloolefin include hexacycloheptadecene and the like.

In addition, examples of the cyclic polyolefin include a copolymer of a cyclic olefin monomer and another monomer such as ethylene, a hydrogenated product thereof, and the like.

The inner layer 16 made of such a material has a thickness of 5 μm or more and 300 μm or less, preferably 10 μm or more and 100 μm or less. By setting the thickness of the inner layer 16 to a thickness within this range, the non-adsorptive property of the tube container 1 with respect to the contents can be enhanced.

On the other hand, the outer layer 18 has a thickness of 5 μm or more and 300 μm or less, preferably 10 μm or more and 100 μm or less. By making the outer layer 18 having a thickness in this range, the non-adsorptive property of the tube container 1 to the external substance can be enhanced.

The intermediate layer 17, which is a gas barrier layer, is a layer having an effect of preventing gas such as oxygen and water vapor from permeating through the film 15. The intermediate layer 17 is formed of, for example, a metal foil, a film layer on which a metal such as aluminum or an inorganic oxide is vapor-deposited, an ethylene-vinyl alcohol copolymer (EVOH), a gas barrier resin layer such as vinylidene chloride, or the like. ..

The intermediate layer 17 has a thickness of 3 μm or more and 200 μm or less, preferably 5 μm or more and 60 μm or less.

Although not shown in the drawings, the film 15 constituting the body portion 10 may be further provided with a flexible layer. The flexible layer is a layer having an effect of improving the flexibility of the film 15, and is a polyolefin resin layer such as polypropylene (PP) or polyethylene (PE), a thermoplastic elastomer resin layer such as an olefin elastomer or a styrene elastomer, and the like. Alternatively, it is formed of an adhesive resin layer made of an adhesive polyolefin. Examples of the polyolefin having adhesiveness include Admer (registered trademark) manufactured by Mitsui Chemicals and Modic (registered trademark) manufactured by Mitsubishi Chemical Corporation.

The thickness of the flexible layer described above is 10 μm or more and 300 μm or less, preferably 15 μm or more and 150 μm or less.

The flexible layer may be provided as an adhesive layer between other layers, for example, by adhering an inner layer and an intermediate layer or adhering an intermediate layer and an outer layer.

Further, the tube container 1 can be provided with a reinforcing layer. The reinforcing layer is a layer having an action of complementing the strength characteristics of the film 15, and is a polyolefin-based resin layer such as polypropylene (PP) or polyethylene (PE), or biaxially stretched polyethylene terephthalate (O-PET), biaxial. It is made of a stretched nylon (O-Ny) or a biaxially stretched polypropylene (OPP) resin layer or the like. The thickness of the reinforcing layer is 3 μm or more and 500 μm or less, preferably 5 μm or more and 300 μm or less.

The method for producing such a film 15 is not particularly limited, and a film 15 having a multilayer structure can be produced by an extrusion laminating method, a dry laminating method, a coextrusion method, or a combination thereof.

(Pouring unit)
As shown in FIGS. 1 and 2, the dispensing unit 20 is composed of a spout portion 21 and a shoulder portion 24 projecting outward from the spout portion 21 in the radial direction.

The spout portion 21 has a cylindrical shape, and a cavity 23 that communicates the inside and the outside of the tube container 1 is formed in the center. The shoulder portion 24 has a truncated cone shape and projects radially outward from the lower end portion of the spout portion 21. The shoulder portion 24 can also be formed in a disk shape.

In the example of the pouring unit 20 shown in FIGS. 1 and 2, the cap 30 is detachably configured with respect to the pouring outlet portion 21. In the pouring unit 20, a male screw 22 extending spirally is formed on the outer peripheral surface of the spout portion 21, and a female screw (not shown) is even formed on the inner peripheral surface of the cap 30. In this pouring unit 20, the male screw 22 of the spout portion 21 and the female screw of the cap 30 are engaged with each other, and the cap 30 is turned with respect to the spout portion 21 so that the spout portion 21 is opened and closed by the cap 30. There is.

However, the pouring unit 20 can function as a lid of the pouring unit 20 itself without providing the cap 30. In that case, the cavity 23 is closed at the position of the upper surface of the spout portion 21 with the material constituting the spout portion 21 itself, and when the contents are poured out, a hole is made in the upper surface of the spout portion 21. By emptying, the contents are poured out.

The width of the shoulder of the dispensing unit 20 is the length connecting the furthest points of the shoulder 24 so that the dispensing unit 20 can be welded while being inserted into the open end of the body 10. It is preferable that the L3 is 100 μm or more and 1000 μm or less smaller than the size of the open end end of the body portion 10.

The shape of the shoulder portion 24 of the dispensing unit 20 is not particularly limited, and for example, the shape of the shoulder portion 24 when the dispensing unit 20 is viewed in a plan view is a substantially circular shape as shown in FIG. 5 (A). , Can be formed into a substantially elliptical shape as shown in FIG. 5 (B). Further, the shoulder portion 24 of the dispensing unit 20 can be formed into a polygonal shape such as a quadrangle as shown in FIG. 5 (C) or a hexagon as shown in FIG. 5 (D).

The dispensing unit 20 has a single-layer structure shown in FIG. 6 (A) or a multi-layer structure as shown in FIG. 6 (B). The pouring unit 20 contains a non-adsorbent resin at least on the surface in contact with the contents in both the single-layer structure shown in FIG. 6A and the multilayer structure shown in FIG. 6B. It is molded from resin. Hereinafter, each layer structure of the pouring unit 20 will be specifically described.

When the dispensing unit 20 has a single-layer structure as shown in FIG. 6A, the dispensing unit 20 is formed of a resin containing a non-adsorbent resin. Specific examples of the non-adsorbent resin constituting the pouring unit 20 are the same as the non-adsorbent resin constituting the non-adsorbent layer of the body portion 10.

In addition, additives can be added to the single-layer structure pouring unit as needed. Examples of the additive include antioxidants, lubricants, antiblocking agents, flame retardants, ultraviolet absorbers, light stabilizers, antistatic agents, organic fillers, inorganic fillers, colorants and the like.

When the dispensing unit 20 has a single-layer structure, the thickness of the dispensing unit 20 is 50 μm or more and 50 mm or less, preferably 300 μm or more and 30 mm or less.

When the dispensing unit 20 has a multi-layer structure as shown in FIG. 6B, the dispensing unit 20 includes an inner layer 26, an intermediate layer 27, and an outer layer 28. The inner layer 26 and the outer layer 28 are formed of a resin containing a non-adsorbent resin. On the other hand, the intermediate layer 27 is a gas barrier layer, and is a metal foil, a film on which a metal such as aluminum or an inorganic oxide is vapor-deposited, an ethylene-vinyl alcohol copolymer (hereinafter referred to as “EVOH”), or vinylidene chloride. Alternatively, it is formed of a resin containing nylon.

When a material that cannot be extruded together with the inner layer and the outer layer such as a metal foil, a film on which a metal such as aluminum or an inorganic oxide is vapor-deposited, is used for the intermediate layer 27, a molding method such as insert molding is used.

EVOH is a copolymer of ethylene and vinyl alcohol and is known. The ratio of ethylene to vinyl alcohol is preferably 20% or more and 50 mol% or less of ethylene and 50 mol% or more and 80 mol% or less of vinyl alcohol.

When a resin containing EVOH is used as the intermediate layer 27, the thickness of the intermediate layer 27 is preferably 5 μm or more and 200 μm or less, preferably 10 μm or more and 100 μm or less.

Nylon is a polyamide resin, and examples thereof include nylon 6, nylon 66, and the like. Further, the intermediate layer 27 may be made of metal-deposited nylon such as aluminum-deposited nylon.

When a resin containing nylon is used as the intermediate layer 27, the thickness of the intermediate layer 27 is preferably 1 μm or more and 200 μm or less, preferably 10 μm or more and 100 μm or less.

The above-mentioned injection unit 20 can be manufactured by, for example, an injection molding method, an extrusion molding method, a pressure molding method, a draw molding method, a compression molding method, or an insert molding method.

(Contents)
The contents of the tube container 1 are not particularly limited, and examples thereof include foods and drinks, cosmetics, and drugs containing a fragrance or an active ingredient which is a low molecular weight organic compound. Since the tube container 1 is excellent in non-adsorption property, the low molecular weight organic compound contained in the content is adsorbed by the tube container 1, and the flavor of the content is changed or the efficacy is deteriorated. Can be prevented.

<Manufacturing method of tube container>
The method for manufacturing the tube container 1 includes a step of preparing the film 15, a step of welding both side edges of the film 15 to form a tubular body 10a, molding of the injection unit 20, and one end of the tubular body 10a in the axial direction. It has a step of welding the side to the peripheral surface of the shoulder portion 24 of the pouring unit 20 and a step of welding and closing the other end side of the tubular body 10a in the axial direction. The contents are filled from the other end side in the axial direction of the cylinder 10a at the stage of the semi-finished product in which the cylinder 10a is welded to the pouring unit 20. The other end side of the cylinder 10a in the axial direction is welded and closed after the contents are filled.

In the method for manufacturing the tube container 1, first, a step of preparing the film 15 is performed. The film 15 is manufactured by the manufacturing method described above.

Next, a step of forming the tubular body 10a is performed. The tubular body 10a configured as the body portion 10 is formed of a rectangular film 15. In the rectangular film 15, both side edges 15a and 15b are overlapped to form a cylindrical tubular body 10a. The overlapping region is a region of the rectangular film 15 from one side in the left-right direction to the position where the length is L1 and a region from the other side in the left-right direction to the region where the length is L1. .. At that time, as shown in FIG. 3, the one side edge 15a on one side of the film 15 and the other side edge 15d on the other side of the film 15 are opposed to each other and overlapped with each other.

Next, the overlapped portion of the film 15 is welded. Welding is performed by heat sealing. This welded portion is configured as the back seal portion 11. Examples of the heat seal include a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal, and the like.

Next, a step of forming the pouring unit 20 and welding one end side of the tubular body 10a in the axial direction to the peripheral surface of the shoulder portion 24 of the pouring unit 20 is performed. This step is a step of forming the pouring unit 20 and welding the pouring unit 20 and the cylinder 10a at the same time, and the shoulder portion of the pouring unit 20 is inside the one end side in the axial direction of the cylinder 10a. By forming the outer peripheral surface 24a of the 24, one end of the tubular body 10a in the axial direction is welded.

Next, the contents are filled from the other end side in the axial direction of the tubular body 10a.

After that, a step of welding and closing the other end side of the tubular body 10a in the axial direction is performed. The other end of the cylinder 10a in the axial direction is welded, and the other end side of the cylinder 10a in the axial direction is closed. At that time, the inner surfaces of the tubular body 10a are overlapped with each other and welded on the other end side in the axial direction. Welding is performed by heat sealing.

The method for manufacturing the tube container 1 described above is a method in which the injection unit 20 is welded to the tubular body 10a at the same time as molding. However, the manufacturing method of the tube container 1 is not limited to this manufacturing method, and the pouring unit 20 is separately molded, and the shoulder portion 24 of the pouring unit 20 is placed inside the one end side of the tubular body 10a in the axial direction. It may be inserted and welded to the outer peripheral surface 24a of the shoulder portion 24 of the pouring unit 20 by a heat seal or the like at one end of the tubular body 10a in the axial direction.

[Second Embodiment]
Next, the tube container 2 of the second embodiment will be described with reference to FIGS. 7 and 8. The tube container 2 of the second embodiment has the same configuration as that of the tube container 1 of the first embodiment except that the bottom portion (the other end side) of the body portion 10 is closed by the bottom lid 40 which is a lid material. Similar to the configuration. Therefore, regarding the tube container 2 of the second embodiment, the same configuration as that of the tube container 1 of the first embodiment is designated by the same reference numerals in the drawings, and detailed description thereof will be omitted.

The tube container of the second embodiment is composed of a pouring unit 20 for pouring out the contents, a body portion 10 welded to the pouring unit 20, and a bottom lid 40 for closing the bottom of the body portion 10. There is.

The pouring unit 20 is composed of a spout portion 21 and a shoulder portion 24. The material and composition of the dispensing unit 20 are the same as the material and composition of the dispensing unit 20 constituting the tube container 1 of the first embodiment.

The body portion 10 is formed by a tubular body 10a formed of the film 15. The material of the body portion 10 is the same as the material of the body portion 10 constituting the tube container 1 of the first embodiment. On the other hand, the structure of the body portion 10 is different from that of the body portion 10 constituting the tube container 1 of the first embodiment, in which the pouring unit 20 is attached to one end side in the axial direction thereof and to the other end side. The bottom lid 40 is attached. The configuration of attaching the body portion 10 and the pouring unit 20 is the same as that of the tube container 1 of the first embodiment.

As shown in FIG. 8, the bottom lid 40, which is a lid material, is composed of a bottom surface 41 and a peripheral surface 42. The bottom surface 41 has a flat disk shape and has a function of closing the bottom portion of the body portion. The peripheral surface 42 is provided along the peripheral edge of the bottom surface, and is a portion to be welded to the bottom portion of the body portion 10. The material and layer structure of the bottom lid 40 are not particularly limited as long as the surface in contact with the contents is molded from a resin containing a non-adsorbent resin, but the same material as the above-mentioned pouring unit 20 is used. It is preferable to form a similar layer structure.

In the bottom lid 40, for example, the peripheral surface 42 is inserted into the tubular body 10a at the bottom of the tubular body 10a configured as the body portion 10, and the outer peripheral surface of the peripheral surface 42 and the inner peripheral surface of the tubular body 10a are formed. Is attached by welding. However, the tubular body 10a may be inserted inside the peripheral surface 42, and the bottom portion of the tubular body 10a and the peripheral surface 42 may be welded.

As described above, according to the tube container 1 according to the present invention, the body portion 10 has an inner layer 16 and an outer layer 18 made of a resin containing a non-adsorbent resin, and at least the surface of the pouring unit 20 in contact with the contents is non-adsorbent. Since it is made of a resin containing a resin, it has excellent non-adsorptive properties to the contents. Even when the bottom lid 40 is provided as in the tube container 2, at least the surface of the bottom lid 40 in contact with the contents is formed of a resin containing a non-adsorbent resin, so that the bottom lid 40 is excellent in non-adsorption to the contents. Will have sex.

Further, since the intermediate layer 17 which is a gas barrier layer is provided on the body portion 10, the tube container 1 can be provided with a gas barrier property. Further, by providing the pouring unit 20 and the bottom lid 40 with an intermediate layer 27 which is a gas barrier layer containing a gas barrier substance, the pouring unit 20 and the bottom lid 40 can also have gas barrier properties.

1 Tube container 10 Body 10a Cylinder 11 Back seal 12 Bottom seal 12a Seal allowance 15 Film 16 Inner layer 17 Intermediate layer 18 Outer layer 20 Injection unit 21 Injection outlet 22 Male screw 23 Cavity 24 Shoulder 24a Outer surface 26 Inner layer 27 Intermediate layer 28 Outer layer 30 Cap 40 Bottom lid (cover material)

Claims (2)

It is composed of a pouring unit for pouring out the contents and a body portion welded to the pouring unit and for accommodating the contents.
The pouring unit includes a spout portion from which the contents are poured, and a shoulder portion that juts out radially outward from the spout portion.
In the body portion, one side edge of one side edge of the film is overlapped with the other side edge of the other side edge, and the overlapped one side edge edge and the other side edge edge are heat-sealed. Welded,
The inner surface of one end of the body portion in the axial direction is welded to the outer peripheral surface of the shoulder portion.
The other end of the body in the axial direction is closed by welding the inner surfaces together.
The injection unit consists of a non-adsorbent inner layer made of a resin containing a non-adsorbent resin, an intermediate layer which is a gas barrier layer containing a gas barrier substance, and a non-adsorbent outer layer made of a resin containing a non-adsorbent resin. an insert molding member ing at least three layers,
The film constituting the body is a non-adsorptive inner layer made of a resin containing a non-adsorbent resin, an intermediate layer which is a gas barrier layer containing a gas barrier substance, and a non-adsorptive resin made of a resin containing a non-adsorbent resin. an extrusion lamination or dry lamination member ing at least three layers of the outer layer,
The non-adsorbent resin is a polyester resin, and the polyester resin is a copolymer containing isophthalic acid and ethylene glycol.
The gas barrier layer is a tube container made of a metal foil or a metal vapor-deposited film. The tube container according to claim 1, wherein a polyolefin adhesive resin layer is provided as a flexible layer between the inner layer and the intermediate layer and / or between the intermediate layer and the outer layer.

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