Packaging material for tube containers and tube containers

Abstract

To provide a tube container and a tube container packaging material capable of improving design.SOLUTION: A tube container 20 consists of, in the order from the outer surface to the inner surface, an outer face printing base material layer 1, an outer face sealant layer 2, an inner face printing base material layer 3, and an inner face sealant layer 5. The outer surface of the outer face printing base material layer 1 has an outer face printing part 1a on an area other than pasting ends 11,11, and the inner surface or the outer surface of the inner face printing base material layer 3 has an inner face printing part 3a on an area including the pasting ends 11,11.SELECTED DRAWING: Figure 1A

Description

[Technical field]

[0001] The present invention relates to a packaging material for tube containers and a tube container, and more particularly to a packaging material for tube containers and a tube container that can improve design. [Background technology]

[0002] Conventionally, a tube container is known that includes a packaging material for a tube container having a printed base material layer having heat sealability, a base material layer, and an inner sealant layer, which are layered in this order from the outer surface to the inner surface. The printed base material layer having heat sealability has an outer surface printed thereon. The printed base material layer and the inner sealant layer are made of a material having heat sealability, such as polyethylene.

[0003] Incidentally, a tube container is obtained by overlapping a pair of bonded ends of the above-mentioned tube container packaging material and joining the pair of bonded ends together. In this case, since the pair of bonded ends of the tube container are the parts to be joined, no external printing is performed on the pair of bonded ends. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-144812 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] The present invention has been made in consideration of these points, and has an object to provide a packaging material for tube containers and a tube container that can improve the design of the bonded ends in particular. [Means for solving the problem]

[0006] The present invention relates to a packaging material for tube containers having a pair of bonded ends, the packaging material comprising an outer printed substrate layer / an inner printed substrate layer / an inner sealant layer, each having heat sealability, arranged in that order from the outer surface to the inner surface, in which an outer printed portion is provided using printing ink in an area of ​​the outer surface of the outer printed substrate layer other than the bonded ends, and an inner printed portion is provided using printing ink in an area of ​​the inner surface or outer surface of the inner printed substrate layer, including the bonded ends.

[0007] The present invention is a packaging material for tube containers, in which an outer sealant layer is provided between the outer printed substrate layer and the inner printed substrate layer.

[0008] The present invention relates to a packaging material for tube containers, in which the pattern of the outer printed portion and the pattern of the inner printed portion are continuous with each other.

[0009] The present invention relates to a packaging material for tube containers, wherein the inner surface printed base material layer has gas barrier properties.

[0010] The present invention relates to a packaging material for tube containers, which further comprises a gas barrier layer.

[0011] The present invention relates to a tube container formed by joining a pair of bonded ends, which comprises an outer printed substrate layer / an inner printed substrate layer / an inner sealant layer arranged in that order from the outer surface to the inner surface, and in which an outer printed portion is provided using printing ink in an area of ​​the outer surface of the outer printed substrate layer other than the bonded ends, and an inner printed portion is provided using printing ink in an area of ​​the inner surface or outer surface of the inner printed substrate layer including the bonded ends.

[0012] The present invention relates to a tube container, in which an outer sealant layer is provided between the outer printed substrate layer and the inner printed substrate layer.

[0013] The present invention relates to a tube container, in which the pattern of the outer printed portion and the pattern of the inner printed portion are continuous with each other.

[0014] The present invention relates to a tube container, wherein the inner surface printed base material layer has gas barrier properties.

[0015] The present invention relates to a tube container further comprising a gas barrier layer. Effect of the Invention

[0016] As described above, according to the present invention, the design can be improved particularly at the pair of bonded ends. [Brief description of the drawings]

[0017] [Figure 1A] FIG. 1A is a side cross-sectional view showing a laminate of a packaging material for tube containers according to a first embodiment. [Figure 1B] FIG. 1B is a side cross-sectional view showing a laminate of tube container packaging materials according to a second embodiment. [Diagram 2] FIG. 2 is a diagram showing a manufacturing method of a tube container. [Diagram 3] FIG. 3 is a diagram showing a manufacturing method of a tube container. [Figure 4] FIG. 4 is a side cross-sectional view showing a packaged product including a tube container. [Diagram 5] FIG. 5 is a plan view showing the positional relationship between the outer surface printed portion and the inner surface printed portion of the packaging material for tube containers. BEST MODE FOR CARRYING OUT THEINVENTION

[0018] <First embodiment of the present invention> The packaging material for tube containers and the tube container according to the first embodiment of the present invention will be described in more detail below with reference to the drawings and the like.

[0019] First, a tube container 20 produced using the packaging material 10 for tube containers according to the present invention will be described with reference to Figs.

[0020] The tube container 20 has a cylindrical body 21 including the tube container packaging material 10, and a shoulder 13 and a mouth 14 produced by providing a resin to the cylindrical body 21 by compression molding. A cap 16 is attached to the mouth 14 of the tube container 20.

[0021] The tube container 20 having such a configuration is obtained through the following manufacturing process.

[0022] First, as shown in Fig. 2, a tube container packaging material 10 according to the present invention is used, and a pair of bonded ends (hereinafter also referred to as both ends) 11, 11' of the tube container packaging material 10 are overlapped and the outer and inner surfaces of the overlapped parts are heat-sealed and bonded together to form a heat-sealed part 12, thereby producing a cylindrical body 21. Next, as shown in Fig. 3, the cylindrical body 21 is placed in a mold, and a shoulder part 13 and a mouth part 14 are formed at one opening 21A of the cylindrical body 21 by a normal method such as compression molding. In this way, the shoulder part 13 and the mouth part 14 are integrally molded at one opening 21A of the cylindrical body 21, and a tube container 20 is produced. Then, a cap 16 is attached to the mouth part 14 of the tube container 20.

[0023] Next, an appropriate amount of, for example, toothpaste or other contents 17 is filled into the tube container 20 through the other opening 21B of the cylindrical body 21. Thereafter, the other opening 21B is welded to form a bottom seal portion 18, and a packaged product 20A including the tube container 20 filled and packaged with the contents 17 is obtained.

[0024] Next, a packaging material 10 for tube containers used to produce a tube container 20 will be described with reference to Fig. 1A. As shown in Fig. 1A, the packaging material 10 for tube containers includes a laminate having an outer printed substrate layer 1 having heat sealability, an outer sealant layer 2, an inner printed substrate layer 3, and an inner sealant layer 5, which are arranged in this order from the outer surface to the inner surface. Of these, an outer printed portion 1a including a desired pattern is formed on the outer surface of the outer printed substrate layer 1 using a printing ink, and an inner printed portion 3a including a desired pattern is formed on the inner surface of the inner printed substrate layer 3 using a printing ink. The inner printed portion 3a may be provided on the outer surface of the inner printed substrate layer 3 using a printing ink.

[0025] The outer sealant layer 2 and the inner printed substrate layer 3 are joined by dry lamination (DL), and the outer printed substrate layer 1 and the outer sealant layer 2 are joined by extrusion lamination (EC). Furthermore, the inner printed substrate layer 3 and the inner sealant layer 5 are joined by dry lamination (DL).

[0026] In this specification, the terms "outer surface" and "inner surface" refer to the "outer surface" and "inner surface" when the tube container 20 is produced using the tube container packaging material 10.

[0027] Next, the materials of each part constituting the tube container packaging material 10 will be described.

[0028] The outer printed substrate layer 1, the outer sealant layer 2 and the inner sealant layer 5 may contain, for example, polyethylene (PE). Specifically, the outer printed substrate layer 1, the outer sealant layer 2 and the inner sealant layer 5 may be made of the following materials.

[0029] The outer printing base layer 1, the outer sealant layer 2 and the inner sealant layer 5 may be any material that can be melted and fused to each other by heat, and examples of resins that can be used include low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), polypropylene (PP), ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-propylene copolymer, methylpentene polymer, acid-modified polyolefin resins such as polyethylene or polypropylene modified with unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid and the like, polyvinyl acetate resins, polyester resins, polystyrene resins and the like.

[0030] The inner surface printed substrate layer 3 may be a polyethylene terephthalate (PET) layer, and the PET layer 3 may be printed to provide an inner surface printed portion 3a made of printing ink.

[0031] In addition, instead of using a PET layer as the inner surface printing substrate layer 3, a nylon (Ny) layer may be used, or a polyethylene terephthalate (PET) layer having a metal vapor deposition film on its surface and gas barrier properties may be used, or a nylon (Ny) layer having a metal vapor deposition film on its surface and gas barrier properties may be used.

[0032] Next, the outer printed portion 1a provided on the outer surface of the outer printed substrate layer 1 having heat sealability, and the inner printed portion 3a provided on the inner surface of the inner printed substrate layer 3 will be described.

[0033] 5, the outer printed portion 1a is provided in an area other than the pair of bonded ends (both ends) 11, 11' of the tube container packaging material 10. The reason for providing the outer printed portion 1a in an area other than the pair of bonded ends 11, 11' is that the pair of bonded ends 11, 11' are the portions where the outer and inner surfaces are overlapped and joined together when the tube container 20 is produced.

[0034] Therefore, the pair of bonded end portions 11, 11' of the packaging material 10 for tube containers does not have the outer surface printed portion 1a.

[0035] Since the outer printed portion 1a is not provided on the pair of joined ends 11, 11' of the tube container 20 produced in this manner, the outer printed portion 1a is discontinuous at the pair of joined ends 11, 11'.

[0036] On the other hand, the inner printed part 3a provided on the inner surface of the inner printed substrate layer 3 is formed in an area including at least a pair of bonded ends 11, 11'. In this case, the outer printed part 1a provided on the outer surface of the outer printed substrate layer 1 and the inner printed part 3a provided on the inner surface of the inner printed substrate layer 3 have similar patterns, so that a similar continuous pattern can be seen outwardly around the entire circumference of the tube container 20 including the pair of bonded ends 11, 11'. Note that FIG. 5 shows a plurality of continuous tube container packaging materials 10 before being cut along the cutting lines L.

[0037] In the above embodiment, the inner printed portion 3a is formed in an area including at least a pair of bonded end portions 11, 11', but the inner printed portion 3a may be formed over the entire area of ​​the packaging material 10 for tube containers if necessary.

[0038] Next, a method for producing a packaging material for tube containers will be described with reference to FIG. 1A.

[0039] First, printing is applied to the inner surface of the inner surface printing substrate layer 3, and in this manner, an inner surface printed part 3a made of printing ink is provided on the inner surface of the inner surface printing substrate layer 3.

[0040] Next, the inner surface sealant layer 5 is bonded to the inner surface side of the inner surface printing base material layer 3 by dry lamination (DL).

[0041] Next, the outer sealant layer 2 is bonded to the outer surface side of the inner printed substrate layer 3 by dry lamination (DL) using polyethylene. On the other hand, printing is applied to the outer surface of the outer printed substrate layer 1, and thus an outer printed portion 1a made of printing ink is provided on the outer surface of the outer printed substrate layer 1. Next, the inner surface of the outer printed substrate layer 1 is bonded to the outer surface of the outer sealant layer 2 by extrusion lamination (EC). In this manner, a packaging material 10 for tube containers is obtained.

[0042] The tube container packaging material 10 obtained in this manner is formed into a cylindrical shape, and as described above, its two end portions 11, 11' are overlapped and the outer and inner surfaces of the tube container packaging material 10 at both end portions 11, 11' are heat-sealed to produce the tubular body portion 21.

[0043] In this case, the outer printed base material layer 1 and outer sealant layer 2 provided on the outer side of the tube container packaging material 10 and the inner sealant layer 5 provided on the inner side are melted and joined to obtain a cylindrical body portion 21.

[0044] Next, the cylindrical body 21 is inserted into a mold, and the shoulder portion 13 and the mouth portion 14 are formed in the cylindrical body 21 by compression molding, thereby obtaining the tube container 20 (see Figs. 2 and 3).

[0045] Next, the cap 16 is attached to the mouth 14 of the tube container 20 obtained in this manner, and a plurality of the tube containers 20 with the caps 16 attached are stored together in a cardboard box. Thereafter, the plurality of tube containers 20 with the caps 16 attached are transported together in the cardboard box.

[0046] As described above, according to this embodiment, the outer printed portion 1a is provided in an area other than the pair of bonded ends 11, 11', and the inner printed portion 3a is provided in an area including the pair of bonded ends 11, 11', and since the outer printed portion 1a and the inner printed portion 3a include similar patterns, a similar continuous pattern can be formed around the entire circumference of the tube container 20.

[0047] <Second embodiment> Next, a second embodiment of the present invention will be described with reference to FIG. 1B.

[0048] In the second embodiment shown in Fig. 1B, a gas barrier layer 4 is attached to the inner printed substrate layer 3 of a packaging material 10 for tube containers by dry lamination, and an inner sealant layer 5 is attached to this gas barrier layer 4 by dry lamination. In the second embodiment shown in Fig. 1B, other configurations are similar to those of the first embodiment shown in Fig. 1A and Fig. 2 to Fig. 5. In the second embodiment shown in Fig. 1B, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed explanations thereof will be omitted.

[0049] In the second embodiment, the packaging material 10 for tube containers further has a gas barrier layer 4 arranged between the inner printed substrate layer 3 and the inner sealant layer 5, and as this gas barrier layer 4, a metal foil or a layer having a substrate film and a vapor deposition film vapor-deposited on the substrate film can be used (see FIG. 1B).

[0050] Specifically, the metal foil used as the gas barrier layer may be, for example, aluminum foil. As the base film on which the vapor deposition film is provided, films or sheets of various resins such as polyethylene resins, polypropylene resins, cyclic polyolefin resins, fluorine resins, polystyrene resins, acrylonitrile-styrene copolymers (AS resins), acrylonitrile-butadiene-styrene copolymers (ABS resins), polyvinyl chloride resins, fluorine resins, poly(meth)acrylic resins, polycarbonate resins, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyamide resins such as various nylons, polyimide resins, polyamideimide resins, polyarylphthalate resins, silicone resins, polysulfone resins, polyphenylene sulfide resins, polyethersulfone resins, polyurethane resins, acetal resins, cellulose resins, and others may be used.

[0051] In the present invention, it is particularly preferable to use polyethylene terephthalate (PET) as the base film.

[0052] As the deposited film deposited on the base film, an aluminum deposited film can be used, and VM-PET containing the base film and the aluminum deposited film can be used as the gas barrier layer.

[0053] In the above first and second embodiments, an example is shown in which an outer sealant layer 2 is provided between the outer printed substrate layer 1 and the inner printed substrate layer 3, but if the outer printed substrate layer 1 has sufficient heat sealing function, the outer sealant layer 2 does not necessarily need to be provided. EXAMPLES

[0054] Next, specific examples of the present invention will be described.

[0055] Example 1 Example 1 corresponds to the above-mentioned first embodiment.

[0056] As the packaging material 10 for tube containers, a laminate having the following layer structure was prepared.

[0057] Outer printed part 1a / LDPE layer 1 (20 μm) / LLDPE layer 2 (100 μm) / PET layer 3 (12 μm) / Inner printed part 3a / LLDPE layer 5 (210 μm) Here, the LDPE layer 1 is made of low density polyethylene and constitutes the outer printing base layer. The LLDPE layer 2 is made of linear low density polyethylene and constitutes the outer sealant layer. The PET layer 3 is made of polyethylene terephthalate and constitutes the inner printing base layer. The LLDPE layer 5 is made of linear low density polyethylene and constitutes the inner sealant layer.

[0058] In the tube container packaging material 10, the outer printed portion 1a is formed in an area other than the pair of bonded ends 11, 11', and the inner printed portion 3a is formed in an area corresponding to the bonded ends 11, 11'.

[0059] The outer printed portion 1a and the inner printed portion 3a have the same pattern, which makes it possible to form a continuous, identical pattern over the entire circumference of the tube container 20 produced from the packaging material 10 for tube containers.

[0060] In this case, the pair of bonded ends 11, 11' of the tube container 20 do not stand out particularly, and the contents are not covered externally through the pair of bonded ends 11, 11', thereby improving the design of the tube container 20, particularly at the pair of bonded ends 11, 11'.

[0061] In addition, for the tube container packaging material 10 in Example 1, the bonding strength of the pair of bonded ends 11, 11', and the bonding strength between the tube container packaging material 10 and the shoulder portion 13 and between the tube container packaging material 10 and the mouth portion 14 were measured.

[0062] As comparative examples, we prepared a packaging material for tube containers (Comparative Example 1) that was the same as Example 1 except that it had an outer printed portion 1a but not an inner printed portion 3a, and a packaging material for tube containers (Comparative Example 2) that was the same as Example 1 except that it had an inner printed portion 3a but not an outer printed portion 1a.

[0063] For these tube container packaging materials as Comparative Examples 1 and 2, the bonding strength between the shoulder portion 13 and the mouth portion 14 was measured.

[0064] It was found that the tube container packaging material of Example 1 had substantially the same bonding strength at the shoulder portion 13 and the mouth portion 14 as the tube container packaging materials of Comparative Examples 1 and 2. In addition, the pattern of the tube container of Comparative Example 1 was discontinuous at a pair of bonded ends. On the other hand, the pattern of the tube container of Comparative Example 2 did not have the glossy feel specific to the outer surface printing.

[0065] Example 2 Example 2 corresponds to the above-mentioned second embodiment.

[0066] As the packaging material 10 for tube containers, a laminate having the following layer structure was prepared.

[0067] Outer printed part 1a / LDPE layer 1 (20 μm) / LLDPE layer 2 (100 μm) / PET layer 3 (12 μm) / Inner printed part 3a / VMPTET layer 4 (12 μm) / LLDPE layer 5 (210 μm) Here, the LDPE layer 1 is made of low density polyethylene and constitutes the outer printing substrate layer. The LLDPE layer 2 is made of linear low density polyethylene and constitutes the outer sealant layer. The PET layer 3 is made of polyethylene terephthalate and constitutes the inner printing substrate layer. The LLDPE layer 5 is made of linear low density polyethylene and constitutes the inner sealant layer. The VMP layer 4 is made of polyethylene terephthalate with an aluminum vapor deposition film on the outer surface and constitutes the gas barrier layer 4.

[0068] In the tube container packaging material 10, the outer printed portion 1a is formed in an area other than the pair of bonded ends 11, 11', and the inner printed portion 3a is formed in an area corresponding to the bonded ends 11, 11'.

[0069] The outer printed portion 1a and the inner printed portion 3a have the same pattern, which makes it possible to form the same continuous pattern around the entire circumference of the tube container 20 made from the packaging material 10 for tube containers.

[0070] In this case, the pair of bonded ends 11, 11' of the tube container 20 do not stand out particularly, and the contents are not covered externally through the pair of bonded ends 11, 11', thereby improving the design of the tube container 20, particularly at the pair of bonded ends 11, 11'.

[0071] In addition, for the tube container packaging material 10 in Example 2, the bonding strength of the pair of bonded ends 11, 11', and the bonding strength between the tube container packaging material 10 and the shoulder portion 13 and between the tube container packaging material 10 and the mouth portion 14 were measured.

[0072] As comparative examples, we prepared a packaging material for tube containers (Comparative Example 3) that was the same as Example 2 except that it had an outer printed portion 1a but not an inner printed portion 3a, and a packaging material for tube containers (Comparative Example 4) that was the same as Example 2 except that it had an inner printed portion 3a but not an outer printed portion 1a.

[0073] For these tube container packaging materials as Comparative Examples 3 and 4, the bonding strength between the shoulder portion 13 and the mouth portion 14 was measured.

[0074] It was found that the tube container packaging material of Example 2 had substantially the same bonding strength at the shoulder portion 13 and the mouth portion 14 as the tube container packaging materials of Comparative Examples 3 and 4. In addition, the pattern of the tube container of Comparative Example 3 was discontinuous at a pair of bonded ends. On the other hand, the pattern of the tube container of Comparative Example 4 did not have the glossy feel specific to the outer surface printing. [Explanation of symbols]

[0075] 1 External printing base material layer 1a External printing section 2 Outer sealant layer 3 Inner printing base material layer 3a Inside printing section 4 Gas barrier layer 5 Inner sealant layer 10. Packaging materials for tube containers 11,11' A pair of bonded ends 20 Tube container

Claims

1. A packaging material for a tube container having a pair of bonded ends, An outer printed substrate layer having heat sealability arranged in order from the outer surface to the inner surface / an inner surface A printing substrate layer / an inner sealant layer is provided, A printing ink is applied to the outer surface of the outer surface printing base material layer in an area other than the pair of bonding ends. An outer surface printing unit is provided using providing an inner surface printed portion using a printing ink in an area including the pair of bonding ends on the inner surface or the outer surface of the inner surface printed base material layer; The outer surface printed portion and the inner surface printed portion have patterns related to each other, thereby forming a regular pattern on the outside over at least one circumference of the tube container packaging material including the pair of bonded ends. Packaging material for tube containers.

2. an outer sealant layer is provided between the outer printed substrate layer and the inner printed substrate layer; 2. A packaging material for a tube container according to claim 1.

3. The tube container according to claim 1 or 2, wherein the inner surface printed substrate layer has a gas barrier property. packaging material.

4. The packaging material for a tube container according to claim 1 , further comprising a gas barrier layer.

5. A packaging material for a tube container having a pair of bonded ends, In a tube container formed by joining a part, The packaging material for tube containers is an outer printed base material layer / an inner printed base material layer arranged in order from the outer surface to the inner surface. A printing substrate layer / an inner sealant layer is provided, A printing ink is applied to the outer surface of the outer surface printing base material layer in an area other than the pair of bonding ends. An outer surface printing unit is provided using providing an inner surface printed portion using a printing ink in an area including the pair of bonding ends on the inner surface or the outer surface of the inner surface printed base material layer; The outer surface printing portion and the inner surface printing portion have patterns related to each other, whereby A continuous pattern having regularity is displayed outwardly over at least one circumference of the packaging material for tube containers including the pair of bonded ends. Tube container.

6. an outer sealant layer is provided between the outer printed substrate layer and the inner printed substrate layer; 6. A tube container as described in 5.

7. The tube container according to claim 5 or 6, wherein the inner surface printed base material layer has a gas barrier property.

8. The tube container according to claim 5 , further comprising a gas barrier layer.

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