Tube container with wound sheet

Abstract

A tube container (100) with a wound sheet is provided with a tube container main body (50) and a wound sheet (10) which has at least a barrier layer and is joined in a wound shape to a main body section of the tube container main body (50).

Description

Technical Field

[0001] The present invention relates to a tube container with a winding sheet, and more particularly to a tube container with a winding sheet, which comprises a tube container body and a winding sheet wound around the container. Background Art

[0002] Conventionally, tube containers are used as containers for many products, including pharmaceuticals, toothpaste, food, cosmetics, adhesives, etc. Generally speaking, tube containers are often used in the following manner: a tube body is formed by a synthetic resin tube formed into a cylindrical shape by blow molding or extrusion molding, or a tube body is formed into a cylindrical shape by winding an aluminum laminate sheet, a head is fixed by heat fusion at the upper end of the cylindrical body, and a mouth tube portion is erected from the upper end opening of the umbrella-shaped shoulder portion, and further, the lower end opening of the body portion is heat-sealed after the content is filled.

[0003] In addition, regarding such a tube container, a tube container with a wrapping sheet has been developed in which a sheet serving as a medium for information such as a pattern or a letter and / or a decorative sheet for aesthetics is wrapped around the main body.

[0004] For example, Patent Document 1 discloses a method in which a decorative film is attached to the surface of a tube container as a base by extrusion molding the main body thereof using residual heat.

[0005] Patent Document 2 discloses a tube container in which a thermal label decorated with a printed layer is adhered and fixed in a wound state by heat fusion within a predetermined height range on the outer peripheral surface of a main body of a preformed tube container body.

[0006] Patent Document 3 discloses a decorated polyethylene tube container, wherein a decorative (decoration) film is wound around a main body of a polyethylene tube container body via an adhesive layer adjacent to a decorative layer so that a winding start portion and a winding end portion overlap.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application No. 2019-531928

[0010] Patent Document 2: Japanese Patent Application Publication No. 2010-105692

[0011] Patent Document 3: Japanese Patent Application Laid-Open No. 07-040515 Summary of the invention

[0012] Problem that the invention aims to solve

[0013] It is recognized that the tube containers with wrapping sheets disclosed in Patent Documents 1 to 3 are all studied in order to prevent the decorative sheet (film or label) from being peeled off or falling off from the tube container body.

[0014] On the other hand, the present invention provides a tube container with a wrapping sheet in which the wrapping sheet can exhibit barrier properties.

[0015] Here, the inventors of the present application have found that it is preferable to peel off part or all of the layers of the winding sheet from the tube container body as needed in the following cases: for example, points, marks, etc. used for product promotion activities, rewards, etc. are recorded on the winding sheet, and the points, marks, etc. need to be removed in order to apply for the promotion activities, rewards, etc.; when it is desired to soften the tube container and completely remove the contents in the tube; or when it is desired to separate the sheet and the tube container body for disposal or recycling, etc.

[0016] Therefore, there is also a need for a tube container with a winding sheet that allows a part or all of the layers of the winding sheet to be easily peeled off from the tube container body.

[0017] In addition, shrink labels used for plastic bottles can be easily peeled off from plastic bottles. However, when such shrink labels are applied to tube containers, when the main body of the tube container is squeezed to squeeze out the contents, the shrink labels are suspended in the air, which causes problems in terms of usability.

[0018] Solutions for solving problems

[0019] The present inventors have conducted intensive studies and have found that the above-mentioned problems can be solved by the following methods, thereby completing the present invention. That is, the present invention is as follows.

[0020] <Technical Solution 1>

[0021] A tube container with a winding sheet comprises a tube container body and a winding sheet, wherein:

[0022] The winding sheet has at least a barrier layer and is joined to the main body portion of the tube container body in a winding shape.

[0023] <Technical Solution 2>

[0024] The tube container with a winding sheet according to technical solution 1, wherein:

[0025] The barrier layer is a metal foil, a metal or metal compound vapor-deposited film, a vinyl alcohol polymer coating or film, a polyvinylidene chloride coating or film, or a combination thereof.

[0026] <Technical Solution 3>

[0027] The tube container with a winding sheet according to claim 1 or 2, wherein:

[0028] The winding sheet also has an easily peelable sealing layer.

[0029] <Technical Solution 4>

[0030] According to the tube container with winding sheet according to technical solution 3,

[0031] The winding sheet also has a surface layer,

[0032] Furthermore, the barrier layer is bonded to the surface layer via the easily peelable sealant layer on a surface opposite to the tube container body.

[0033] <Technical Solution 5>

[0034] According to the tube container with winding sheet according to technical solution 3,

[0035] The barrier layer is bonded to the main body portion of the tube container body via the easily peelable sealant layer.

[0036] <Technical Solution 6>

[0037] The tube container with a winding sheet according to any one of claims 3 to 5, wherein:

[0038] The winding sheet has a peeling open end portion.

[0039] <Technical Solution 7>

[0040] The tube container with a winding sheet according to any one of claims 3 to 6, wherein:

[0041] The winding sheet is provided with a spiral tear line with the tube container as an axis.

[0042] <Technical Solution 8>

[0043] The tube container with a winding sheet according to any one of claims 3 to 7, wherein:

[0044] The winding sheet has a mark indicating that the winding sheet can be peeled off.

[0045] Effects of the Invention

[0046] According to the tube container with a wrapping sheet of the present invention, the wrapping sheet can exhibit barrier properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a front view showing one embodiment of the tube container with a winding sheet according to the present invention.

[0048] Figure 2The present invention is a schematic cross-sectional view of a main body of a tube container body and a heat-sealed wrapping sheet in two forms of the tube container with a wrapping sheet of the present invention.

[0049] Figure 3 It is a schematic diagram showing the state of the peeled opening end portion of each of the tube containers with a winding sheet of Reference Examples 1 to 6. DETAILED DESCRIPTION

[0050] 《Tube container with winding sheet》

[0051] The tube container with a winding sheet of the present invention comprises a tube container body and a winding sheet, wherein:

[0052] The wound sheet has at least a barrier layer and is joined to the main body of the tube container body in a wound shape.

[0053] That is, as a front view showing one embodiment of a tube container with a winding sheet of the present invention (hereinafter also referred to as "the tube container of the present invention") Figure 1 As shown, the tube container 100 with a wrapping sheet of the present invention includes a tube container body 50 and a wrapping sheet 10 . The wrapping sheet 10 includes at least a barrier layer and is joined to the main body 20 of the tube container body 50 in a wrapping shape.

[0054] In addition, in the present invention, the "barrier layer" is any layer having a higher barrier property than the tube container body to components of the tube content, oxygen, water vapor, etc.

[0055] Here, the barrier layer can be, for example, a metal foil, a metal or metal compound vapor-deposited film, a vinyl alcohol polymer coating or film, a polyvinylidene chloride (PVDC) coating or film, or a combination thereof. Here, the metal foil can also be an aluminum foil. The metal or metal compound vapor-deposited film can also be an aluminum vapor-deposited film, a silicon dioxide vapor-deposited film, or a combination thereof. The vinyl alcohol polymer coating or film can also be a polyvinyl alcohol (PVOH) coating or film, an ethylene-vinyl alcohol copolymer (EVOH) coating or film, or a combination thereof. In addition, in the ethylene-vinyl alcohol copolymer (EVOH), the proportion of vinyl alcohol monomer can also be 50 mol% or more. In addition, the polyvinylidene chloride coating or film can also be a copolymer containing vinylidene chloride, in particular a copolymer of vinylidene chloride and vinyl chloride, acrylate or acrylonitrile. In addition, in the copolymer containing vinylidene chloride, the proportion of vinylidene chloride monomer can also be 50 mol% or more. The metal or metal compound vapor-deposited film, the vinyl alcohol polymer coating, and the polyvinylidene chloride coating can be used in the form of a laminate on a polymer film used as a substrate.

[0056] In the present invention, the thickness of the barrier layer is not particularly limited. For example, when the barrier layer is a metal foil, the thickness of the barrier layer may be greater than 1 μm, greater than 3 μm, or greater than 5 μm, and may be less than 100 μm, less than 50 μm, less than 40 μm, less than 30 μm, less than 20 μm, or less than 10 μm. When the barrier layer is a metal or metal compound vapor-deposited film, the thickness of the barrier layer may be greater than 1 nm, greater than 10 nm, greater than 30 nm, or greater than 50 nm, and may be less than 1 μm, less than 500 nm, or less than 300 μm. When the barrier layer is a vinyl alcohol polymer coating or a polyvinylidene chloride (PVDC) coating, the thickness of the barrier layer may be greater than 100 nm, greater than 300 nm, or greater than 500 nm, and may be less than 10 μm, less than 5 μm, or less than 1 μm. When the barrier layer is a vinyl alcohol polymer film or a polyvinylidene chloride (PVDC) film, the thickness of the barrier layer can be greater than 1 μm, greater than 3 μm, greater than 5 μm or greater than 10 μm, and can be less than 100 μm, less than 50 μm, less than 40 μm, less than 30 μm, less than 20 μm or less than 10 μm.

[0057] In the present invention, the state in which the winding sheet is joined to the main body of the tube container body in a wound shape means that no matter how the winding sheet is wound around the main body of the tube container body, the state is ultimately joined in a wound manner. Therefore, the joined portion may be joined over the entire surface or in a strip shape.

[0058] In the present invention, the wrapping sheet may or may not further include an easily peelable sealant layer. Furthermore, the barrier layer may or may not be bonded to the main body of the tube container body via an easily peelable sealant layer.

[0059] When the barrier layer is bonded to the main body of the tube container body without the easy peeling sealant, the barrier layer may be directly bonded to the main body by heat sealing or the like, or may be bonded to the main body via an adhesive layer composed of an adhesive, an adhesive layer composed of an adhesive, or a heat sealant layer composed of a thermoplastic resin. Here, as the adhesive, for example, a dry laminating adhesive, an anchor coating adhesive, a water-soluble adhesive, an emulsion adhesive, a solvent-free laminating adhesive, etc. may be used. As the heat sealant layer, polyolefins, particularly polyethylene resins and polypropylene resins may be used.

[0060] In the present invention, the wrapping sheet may or may not have a surface layer. Here, in the present invention, the "surface layer" refers to a layer or laminated body on the outside of the barrier layer among the layers constituting the wrapping sheet (excluding bonding layers such as an easily peelable sealant layer, an adhesive layer, a bonding layer, and a heat-sealing layer adjacent to the barrier layer).

[0061] In addition, in the present invention, the wrapping sheet may or may not have an inner layer. Here, in the present invention, the "inner layer" refers to a layer or laminated body that is located inside the barrier layer among the layers constituting the wrapping sheet (excluding bonding layers such as an easily peelable sealant layer, an adhesive layer, a bonding layer, and a heat-sealing layer that are adjacent to the barrier layer).

[0062] When the wound sheet has an easily peelable sealant layer, the wound sheet may further have a surface layer, and the barrier layer may be bonded to the surface layer via the easily peelable sealant layer on the surface opposite to the tube container body.

[0063] In this case, specifically, for example, as shown in the schematic cross-sectional view of the winding sheet Figure 2 As shown in (a), the wound sheet 10 is a laminated body in which the surface layer 3, the easily peelable sealant 2a, and the barrier layer 1 are sequentially laminated, and is joined to the main body 20 of the tube container body in a wound shape. In this form, the surface layer 3 and the barrier layer 1 are joined via the easily peelable sealant 2a. Therefore, when the wound sheet is peeled off from the tube container with the wound sheet, it is separated between the surface layer 3 and the barrier layer 1, and is divided into the surface layer 1 and the tube container body having the barrier layer 1.

[0064] Furthermore, when the wound sheet has an easily peelable sealant layer, the barrier layer may be bonded to the main body of the tube container body via the easily peelable sealant layer.

[0065] In this case, specifically, for example, as shown in the schematic cross-sectional view of the winding sheet Figure 2 As shown in (b), the winding sheet 10 is a laminated body in which the surface layer 3, the barrier layer 1, and the easily peelable sealant 2a are sequentially laminated, and is joined to the main body 20 of the tube container body in a wound shape. In this form, the barrier layer 1 and the main body of the tube container body are joined via the easily peelable sealant 2b. Therefore, when the winding sheet is peeled off from the tube container with the winding sheet, it is separated between the barrier layer 1 and the main body 20 of the tube container body, and is divided into a laminated body having the surface layer 1 and the barrier layer 1 and the tube container body.

[0066] As described above, in the tube container 100 with a wrapping sheet of the present invention, the wrapping sheet 10 is joined to the main body 20 of the tube container body in a wrapping shape, so even if the main body 20 is pressed, the wrapping sheet 10 does not hang in the air, and the feel of use is good. In addition, when the wrapping sheet 10 is peeled off, the wrapping sheet 10 can be entirely or partially peeled off from the tube container by utilizing the cohesive failure of the easily peelable sealing layers 2a and 2b.

[0067] The tube container with a wrapping sheet of the present invention can provide the effects of the surface layer and / or the inner layer to the tube container body by joining the wrapping sheet having the surface layer and / or the inner layer to the tube container body in a wrapping shape.

[0068] Specifically, for example, the surface layer and / or the inner layer, particularly the surface layer, can be used as a medium for information such as patterns and characters and / or as a decoration for aesthetics.

[0069] Furthermore, the tube container of the present invention can have one or more of the following advantages (1) to (9) by using a winding sheet, a winding sheet having a surface layer and / or an inner layer, and / or a winding sheet having an easily peelable sealing layer:

[0070] (1) Improve barrier properties

[0071] In the tube container of the present invention, since the wound sheet has the barrier layer, the barrier properties of the entire tube container can be improved.

[0072] (2) Using various additional decorative layers

[0073] In the tube container of the present invention, since the surface layer and / or the inner layer, especially the surface layer, has an additional decorative layer, it is possible to use an additional decorative layer that was difficult to use in conventional laminated tubes, such as an embossed PET film, a PET film with a hologram vapor-deposited film, etc.

[0074] (3) Improve production efficiency / deal with small batches

[0075] Conventional blown tubes and laminated tubes provide printed layers by direct printing. Therefore, for example, when the pattern is changed, the printing plate needs to be replaced each time. In contrast, in the tube container of the present invention, a winding sheet is used, so that the pattern can be changed simply by replacing the winding sheet on which the printing is performed.

[0076] In addition, regarding printing, in the tube container of the present invention, the side seams are not formed by the laminated body as in the conventional laminated tube, and therefore, it is also possible to utilize a printing method such as digital printing, which is functionally insufficient in view of the conventional side seams (in this case, the lamination strength and ink adhesion are insufficient).

[0077] Therefore, in the tube container of the present invention, by using digital printing, it is not only possible to cope with small batches and multiple varieties and short delivery periods, but also possible to reduce printing defective products.

[0078] (4) Thinning of the tube container body and reduction of the amount of resin used

[0079] In the tube container of the present invention, by winding the highly rigid winding sheet around the main body of the tube container body, it is possible to impart self-supporting properties to the tube container even if the tube container body is made thinner.

[0080] Furthermore, in the tube container of the present invention, by reducing the thickness of the tube container body, it is possible to reduce the amount of resin used to form the tube container body.

[0081] (5) Improve the separation and disposal of tube containers

[0082] Conventionally, a tube container with a winding sheet in which the winding sheet and the tube container body cannot be separated is usually disposed of as a combustible. In contrast, when an easily peelable sealing layer is used in the winding sheet, the tube container of the present invention can separate the winding sheet from the tube container body and discard them. By this separate disposal, the amount of combustible waste discarded can also be reduced.

[0083] (6) Ease of disposal

[0084] When an easily peelable sealant layer is used in the winding sheet, in the tube container of the present invention, the tube container can be disposed of in a compact manner by thinning the wall of the tube container body.

[0085] (7) Helps to use up (extrudability)

[0086] When an easily peelable sealant layer is used in the winding sheet, in the tube container of the present invention, the contents can be easily squeezed out from the tube container body that has become relatively soft by peeling off the winding sheet (ultimately, the tube container can be made thin and easy to squeeze out).

[0087] (8) Provide additional information such as advertisements and efficacy descriptions

[0088] When an easily peelable sealant is used in the wrapping sheet, in the tube container of the present invention, by extending (enlarging) the portion overlapped with the wrapping sheet, additional information such as advertisement and efficacy explanation can be provided in the portion.

[0089] (9) Recording product promotion information, lottery, etc. on the winding sheet

[0090] When an easily peelable sealant layer is used in the winding sheet, in the tube container of the present invention, product promotion information, "lottery" or the like is written on the winding sheet, so that the winding sheet can be easily peeled off for application.

[0091] Hereinafter, each component of the tube container with a winding sheet of the present invention will be described.

[0092] 〈Wrapping sheet〉

[0093] The wound sheet of the present invention has at least a barrier layer, and can optionally further have a surface layer, an inner layer, and an easy-peel sealant layer. In addition, the layers of the wound sheet of the present invention can be joined to each other directly by heat sealing or by means of a bonding layer such as an adhesive layer, a bonding layer, a heat sealing layer, etc.

[0094] (Surface and inner layer)

[0095] As described above, in the present invention, the "surface layer" refers to a layer or a laminated body on the outer side of the barrier layer among the layers constituting the wound sheet (excluding bonding layers such as an easily peelable sealant layer, an adhesive layer, a bonding layer, and a heat-sealing layer adjacent to the barrier layer). In addition, in the present invention, the "inner layer" refers to a layer or a laminated body on the inner side of the barrier layer among the layers constituting the wound sheet (excluding bonding layers such as an easily peelable sealant layer, an adhesive layer, a bonding layer, and a heat-sealing layer adjacent to the barrier layer).

[0096] The "surface layer" and "inner layer" may be layers that impart appropriate handling, strength, durability, etc. to the roll sheet of the present invention and function as its support when printing is performed. Therefore, the surface layer and the inner layer may be single layers, or may be a laminate of multiple layers.

[0097] The materials constituting the surface layer and the inner layer are not particularly limited, and can be selected from materials having flexibility that can naturally and fully follow the extrusion deformation of the tube container. In addition, the material constituting the surface layer can also be selected from materials that can withstand the heat during heat sealing, so that the wrapping sheet can be joined by the easy-peel seal layer by heat sealing.

[0098] In the present invention, the thickness of the surface layer and the inner layer is not particularly limited. For example, from the perspective of imparting durability to the wound sheet, the thickness can be greater than 1 μm, greater than 5 μm, greater than 10 μm, or greater than 20 μm. Moreover, from the perspective of imparting softness to the sheet, the thickness can be less than 100 μm, less than 50 μm, less than 40 μm, or less than 30 μm.

[0099] In the present invention, the surface layer and the inner layer can have one or more film layers or paper layers.

[0100] More specifically, examples of the films used for the surface layer and the inner layer include polyethylene films, polypropylene films, polyester films, and particularly polypropylene films such as biaxially stretched polypropylene films, and polyester films such as biaxially stretched polyethylene terephthalate films.

[0101] In the surface layer and the inner layer, a layer other than the film layer or the paper layer may be included for the purpose of imparting more functions. Other layers include, for example, a heat insulating layer such as a foamed polymer layer or a fiber layer, an adhesive layer such as a polyurethane adhesive, etc., but are not limited thereto.

[0102] The surface layer can have text information, symbols, marks, etc. printed on the surface of one or more layers constituting the surface layer. In addition, the surface layer can have an additional decorative layer, which can be observed from the outside of the tube container when the winding sheet of the present invention is wound around the tube container body, thereby adding decoration to the appearance of the tube container, especially adding decoration (decoration) to the appearance of the pattern, color, gloss, etc. In addition, with respect to the present invention, a layer that is only printed with text information, symbols, marks, etc., and a layer that does not add decoration to the appearance of the pattern, color, gloss, etc. does not belong to the "additional decorative layer".

[0103] Adding a decorative layer can be any one or a combination of the following:

[0104] · Film or paper layer with printing

[0105] · Film or paper layer with coating

[0106] · Film or paper layers with added decoration (e.g. matte film layers, polarized film layers, embossed film layers, colored film layers or paper layers)

[0107] (Easy-to-peel seal)

[0108] In the present invention, the "easy-to-peel sealant layer" refers to a layer that can be easily peeled off partially or entirely from the wound sheet by manual operation from the state where the wound sheet is heat-sealed to the main body of the tube container body. In the present invention, the peel strength when the wound sheet is peeled off may be, for example, 12 N / 15 mm or less, 8.0 N / 15 mm or less, or 5.0 N / 15 mm or less, and may be 0.10 N / 15 mm or more, 0.20 N / 15 mm or more, 0.30 N / 15 mm or more, 0.50 N / 15 mm or more, or 1.0 N / 15 mm or more. In addition, the "peel strength" refers to, for example, the peel strength when the wound sheet is peeled off at 180° in accordance with the method specified in Japanese Industrial Standard JIS-Z-0238.

[0109] In the present invention, the thickness of the easily peelable sealant layer is not particularly limited, and can be selected in consideration of usability (crushing durability) when using a tube container, easy peelability when partially or entirely peeling off the layers constituting the wound sheet, etc. For example, the thickness of the easily peelable sealant layer may be 1 μm or more, 5 μm or more, 10 μm or more, or 20 μm or more, and may be 100 μm or less, 50 μm or less, 40 μm or less, or 30 μm or less.

[0110] In the present invention, the easily peelable sealant layer may be a single layer or a laminate of multiple layers (for example, 2 or more layers, 3 or more layers, or 4 or more layers and 6 or 5 or less layers).

[0111] Furthermore, in the present invention, the easily peelable sealant layer may be an easily peelable sealant layer of the intralayer cohesive failure type or an easily peelable sealant layer of the interface peeling type.

[0112] In the present invention, the “easy-peelable sealing layer of intralayer cohesive failure type” refers to an easy-peelable sealing layer such that, when the wound sheet is peeled off from the main body of the tube container main body, the inside of the easy-peelable sealing layer as a single layer is broken, or the inside of one of the multiple layers constituting the easy-peelable sealing layer as a laminate of multiple layers is broken, and a part of the broken easy-peelable sealing layer remains on the tube container main body side, and another part of the broken easy-peelable sealing layer remains on the wound sheet side.

[0113] In the present invention, when the easily peelable sealant layer is of the intra-layer cohesive failure type, the main body of the tube container body after the wrapping sheet is removed has better slidability with respect to human fingers, thereby making it easy to push the tube container body after the wrapping sheet is removed to squeeze out the contents remaining in the tube container body. Here, the reason for such improved slidability is that the broken easily peelable sealant layer remaining on the surface of the tube container body reduces the frictional resistance when the tube container body is pushed with fingers.

[0114] In the present invention, the "interface peeling type easily peelable sealing layer" refers to a layer that peels at the interface between the easily peelable sealing layer and a layer adjacent thereto, at the interface between the easily peelable sealing layer and the tube container body, or at the interface between a plurality of layers constituting the easily peelable sealing layer as a laminate of a plurality of layers when the wound sheet is peeled off from the main body of the tube container body. Therefore, in the "interface peeling type easily peelable sealing layer", when the wound sheet is peeled off from the tube container body, there are cases where the easily peelable sealing layer remains on the tube container side, where the easily peelable sealing layer remains on the winding sheet side, and where a portion of the easily peelable sealing layer remains on the tube container side and the remaining portion of the easily peelable sealing layer remains on the winding sheet side.

[0115] In the present invention, when the easily peelable sealant is an interface peeling type easily peelable sealant, the transparency of the main body of the tube container body after peeling can be maintained, and thus it is preferably used together with a transparent blow molded tube container. In particular, even when the easily peelable sealant remains on the tube container body side, the surface of the easily peelable sealant is smooth, and thus the transparency of the main body of the tube container body after peeling can be maintained.

[0116] In the present invention, the material constituting the easily peelable sealant layer is not particularly limited, and can be appropriately determined based on the type of, for example, "intralayer cohesive failure type easily peelable sealant layer" or "interfacial peeling type easily peelable sealant layer".

[0117] More specifically, the material constituting the easily peelable sealant layer of the intra-layer cohesive failure type can be selected from, for example, polyolefin-based resins.

[0118] More specifically, polyolefin resins include, but are not limited to, low-density polyethylene resins (LDPE), medium-density polyethylene resins (MDPE), linear low-density polyethylene resins (LLDPE), ethylene-vinyl acetate copolymer resins (EVA), ethylene-α-olefin copolymers and other ethylene resins, homopolypropylene resins, propylene-ethylene random copolymers, propylene-ethylene block copolymers, propylene-α-olefin copolymers and other polypropylene resins, polybutene, etc. These may be used alone or as a main raw material to form a blended material. Among these materials, it is preferred to appropriately use a material that can be heat-sealed to a tubular container body.

[0119] In addition, as a material constituting the interfacial peeling type easy peeling sealant layer, it can be selected from a mixture of polyolefin resin and cyclic olefin copolymer in any ratio. In addition, the ratio of cyclic olefin copolymer to the total value of polyolefin resin and cyclic olefin copolymer can be, for example, 1.0 to 50% by mass, particularly 1.0 to 20% by mass, 1.0 to 10% by mass, or 3.0 to 10% by mass.

[0120] Here, the cyclic olefin copolymer refers to a polymer using a cyclic olefin as a monomer, and the main chain or side chain of the polymer has a saturated hydrocarbon ring structure. As a cyclic olefin copolymer, it is preferably a copolymer of at least one cyclic olefin and at least one vinyl compound other than cyclic olefin as a monomer. The cyclic olefin copolymer can be a cyclic olefin random copolymer (COC) based on addition polymerization using at least one cyclic olefin and at least one vinyl compound other than cyclic olefin as monomers, or a cyclic olefin ring-opening polymer or its hydrogenation product (COP) based on ring-opening polymerization using at least one compound having a double bond in a condensed ring skeleton and at least one unsaturated compound other than the compound as a monomer.

[0121] When the cyclic olefin copolymer is a cyclic olefin random copolymer (COC) based on addition polymerization, the cyclic olefin as a monomer is not particularly limited, and examples thereof include: monocyclic cycloolefins such as cyclobutene, 3-methylcyclobutene, 3,4-diisopropenylcyclobutene, cyclopentene, 1-methylcyclopentene, 3-methylcyclopentene, cyclohexene, cyclooctene, 1-methylcyclooctene, 5-methylcyclooctene, cyclooctatetraene, and cyclododecene, polycyclic cycloolefins such as tetracyclododecene and norbornene, and derivatives thereof.

[0122] In addition, the vinyl compound other than the cyclic olefin used as the comonomer of the cyclic olefin random copolymer (COC) is not particularly limited, and examples thereof include α-olefins such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-pentene, 4-methyl-1-pentene, 3-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene and 1-decene; monocyclic dienes such as cyclopentadiene, 1,3-cyclohexadiene and 1,4-cyclohexadiene; polycyclic dienes having a norbornene ring containing two unsaturated bonds; and straight-chain or branched dienes such as butadiene and isoprene.

[0123] When a cyclic olefin random copolymer (COC) is used as a material constituting the interface peeling type easily peelable sealant layer, the ratio of the structural unit derived from the cyclic olefin is preferably in the range of 15 to 60 mol %, more preferably 25 to 50 mol %.

[0124] In addition, when the cyclic olefin copolymer is a cyclic olefin ring-opening polymer or a hydrogenated product (COP) thereof based on ring-opening polymerization, there is no particular limitation on the compound having a double bond in the fused ring skeleton as a monomer as long as it can be polymerized by a metathesis polymerization catalyst. For example, compounds having a norbornene-based skeleton such as tetracyclododecene, norbornene or their derivatives can be cited.

[0125] In addition, the unsaturated compounds other than compounds having double bonds in the condensed ring skeleton as comonomers of the cyclic olefin ring-opening copolymer are not particularly limited as long as they can be polymerized by a metathesis polymerization catalyst. For example, the cyclic olefins, cyclic dienes, monomers having carbon-carbon double bonds in the main chain, and derivatives thereof that are monomers of the above-mentioned cyclic olefin random copolymer (COC) can be listed.

[0126] In addition, the main chain of the cyclic olefin ring-opening polymer has a carbon-carbon double bond (C=C). And, if hydrogenated, a hydrogenation product (COP) in which the double bond of the main chain is converted into a carbon-carbon single bond (CC) can be obtained. From the viewpoint of heat resistance, weather resistance, etc., the polymer may be one in which at least the carbon-carbon double bond of the main chain is hydrogenated.

[0127] When a cyclic olefin ring-opening polymer or a hydrogenated product (COP) thereof is used, the ratio of the structural unit derived from the compound having a double bond in the fused ring skeleton is preferably 80% by mass or more, considering that it is subjected to hydrogenation reaction.

[0128] (Method for producing wound sheet)

[0129] In the wound sheet of the present invention, the method for forming the laminate formed by laminating the barrier layer and any other layers is not particularly limited, and for example, dry lamination, sandwich lamination or co-extrusion film forming can be used. In addition, as each layer or laminate, a commercially available sheet product can also be used directly.

[0130] (Peeling start end)

[0131] In the present invention, when the winding sheet also has an easily peelable sealing layer, from the viewpoint of improving the ease of peeling of the winding sheet, the winding sheet may have a peeling start end portion, or the winding sheet may be provided with a spiral easy tear line with the tube container body as the axis, or may have both.

[0132] The wound sheet can be more easily peeled off from the tube container body by having a peeling opening end. In particular, in the case of a tube container body made of a material containing metal on the surface, the wound sheet preferably has a peeling opening end.

[0133] In the present invention, the peeling start end is not particularly limited, and for example, the peeling start end may be as follows: (i) when the wrapping sheet is heat-sealed to the main body of the tube container body, the region that is not heat-sealed in the easy-peeling sealing layer of the wrapping sheet or the region that is heat-sealed weakly compared to other regions may be used as the peeling start end; (ii) a fusion barrier layer such as a peeling varnish may be provided locally on the easy-peeling sealing layer of the wrapping sheet, and this may be used as the peeling start end.

[0134] Furthermore, from the viewpoint of improving the ease of peeling of the winding sheet, it is preferred that at least a portion of the peeling start end portion is present in the seam of the winding sheet. Here, the seam of the winding sheet refers to the opposite or overlapping portions of the two ends in the winding direction of the sheet when the winding sheet is heat-sealed in a wound state to the main body of the tube container body. That is, the two ends of the winding sheet may be (i) arranged with a certain interval, (ii) just connected, or (iii) overlapping. For example, in the case where the easy-peel sealing layer has an easy-peel sealing layer that undergoes cohesive failure within the layer during peeling, the seam may be any of the above-mentioned types (i) to (iii). In addition, in the case where the easy-peel sealing layer has an easy-peel sealing layer that undergoes interfacial peeling during peeling, the seam is preferably of the above-mentioned type (i) or (ii).

[0135] (Logo)

[0136] In the present invention, when the winding sheet also has an easily peelable sealing layer, the winding sheet may have a mark indicating that the winding sheet can be peeled. More specifically, the winding sheet may be marked with the following marks: peelable; peeling method; peelable and separately discarded; or peelable and using a designated part for application. Such marks can bring convenience to users.

[0137] Furthermore, the winding sheet may have a mark to the effect that the winding sheet can be peeled off from the tube container body by pressing the side of the winding start portion near the overlapping portion.

[0138] Such marking can be performed by printing one or more layers constituting the surface layer, and the marking can be in the form of a marking based only on text, a marking based only on symbols, marks, etc., or a marking based on a combination thereof.

[0139] 〈Tube container body〉

[0140] In the present invention, the tube container is used as a container filled with contents such as medicines, toothpaste, food, cosmetics, or adhesives. In particular, in the present invention, the tube container is used as a container filled with contents such as food, medicine, toothpaste, cosmetics, or adhesives that are sensitive to oxygen or moisture, thereby maintaining the contents relatively unaffected by oxygen or moisture for a long time. Examples of foods that are sensitive to oxygen or moisture include condiments such as mustard.

[0141] The tube container body has a main body and an outlet. In addition, according to design, practicality, etc., for example, a shoulder may be further provided between the main body and the outlet. Figure 1 As shown, the tube container body 50 has a body portion 20 , a shoulder portion 30 , and a spout portion 40 .

[0142] In the present invention, the tube container body may be a laminated tube, a single-layer or multi-layer extruded tube, or a single-layer or multi-layer blow-molded tube. In addition, the laminate or single layer used to form the tube container body may include a layer composed of a resin material and a layer composed of a metal material. In addition, when there are multiple layers used to form the tube container body, each layer may include the same material or different materials.

[0143] 《Method for manufacturing a tube container with a winding sheet》

[0144] The method for producing the tube container with a winding sheet of the present invention is not particularly limited.

[0145] Therefore, for example, the tube container with the wrapping sheet of the present invention can be manufactured by separately preparing a tube container body and a wrapping sheet, and then using a rotary hot roller to heat-compress the heat seal layer as the innermost layer of the wrapping sheet and the main body of the tube container body, thereby heat-sealing the wrapping sheet to the main body of the tube container body in a rolled shape.

[0146] The temperature during the thermocompression bonding is not particularly limited, and may be, for example, 100° C. to 300° C. The force during the thermocompression bonding is not particularly limited, and may be, for example, 5 kgf to 20 kgf.

[0147] When the innermost layer is not a heat seal layer, the bonding can be performed using an adhesive layer composed of a binder or an adhesive layer composed of an adhesive.

[0148] Example

[0149] Hereinafter, the present invention will be described using Examples and Comparative Examples, but the present invention is not limited thereto.

[0150] 《Examples and Comparative Examples》

[0151] As the winding sheets of the examples and comparative examples, laminated bodies having the following layer structures were prepared (wherein " / / " indicates adhesion using a dry lamination adhesive). However, in Comparative Example 1, no winding sheet was used.

[0152] <Example 1A>

[0153] PET layer (12μm) / easy-peel sealant layer (20μm) / / AL layer (9μm) / / PET layer (12μm) / / LLDPE layer (20μm)…Total thickness 73μm

[0154] <Example 1B>

[0155] PET layer (12μm) / / AL layer (9μm) / / PET layer (12μm) / easy-to-peel sealant layer (20μm) ... total thickness 53μm

[0156] <Comparative Example 1>

[0157] No winding film

[0158] <Comparative Example 2>

[0159] LLDPE layer (80 μm) ... total thickness 80 μm

[0160] <Comparative Example 3>

[0161] PET layer (12μm) / easy-peel sealant layer (30μm) / LDPE layer (50μm)…total thickness 92μm The details of the above layer structure are as follows:

[0162] PET layer: Polyethylene terephthalate layer

[0163] AL layer: aluminum foil layer

[0164] LDPE layer: low density polyethylene layer

[0165] Easy-peel sealant: 7601EB manufactured by Toray Film Processing Co., Ltd. (easy-peel sealant for intralayer cohesive failure type polyethylene)

[0166] LLDPE layer: linear low-density polyethylene layer

[0167] The layered structure of the blow-molded tube used as the tube container body in the Examples and Comparative Examples is as follows from the outside toward the content side:

[0168] Surface side LDPE layer (100 μm) / acid-modified resin layer (10 μm) / EVOH layer (20 μm) / acid-modified resin layer (10 μm) / LDPE layer (100 μm) Content side

[0169] The details of the above-mentioned layers are as follows:

[0170] LDPE layer: low density polyethylene layer

[0171] Acid modified resin layer: Acid modified polyethylene layer

[0172] EVOH layer: ethylene vinyl alcohol resin layer

[0173] <Method for manufacturing a tube container with a winding sheet>

[0174] The wrapping sheets of the examples and comparative examples having approximately the same size as the main body of the tube container body were pressed onto a rotating hot roll (200° C.) with a force of 10 kgf via an easily peelable sealant layer for thermocompression bonding to produce tube containers with wrapping sheets of the examples and comparative examples.

[0175] "evaluate"

[0176] 〈Evaluation of the usability of a tube container with a winding sheet〉

[0177] The tube containers with wrapping sheets of the examples and comparative examples were filled with orange juice as the content, the ends were sealed by ultrasonic sealing, and the containers were placed in a freezer at -20°C for 4 hours to freeze the orange juice into a smoothie. Thereafter, the tube containers with wrapping sheets of the examples and comparative examples were squeezed to squeeze out the contents, and the usability (squeeze followability) was evaluated based on the following criteria.

[0178] Evaluation criteria for usability

[0179] A: No hanging or peeling of the winding sheet occurs;

[0180] B: Hanging or peeling of the winding sheet occurred.

[0181] <Evaluation of the peelability of the wound sheet>

[0182] After squeezing out the contents as described in the evaluation method for usability evaluation, the wound sheet was peeled off, and the peelability of the wound sheet was evaluated based on the following criteria.

[0183] Evaluation criteria for peelability

[0184] A: Can be easily peeled off by hand;

[0185] B: Difficult to peel off.

[0186] 〈Evaluation of the Separation and Disposability of Tube Containers with Wrapping Sheets〉

[0187] Whether or not the tube container main body and the winding sheet of the tube container with a winding sheet can be separated and discarded was evaluated based on the following criteria.

[0188] Evaluation criteria for separation and disposal

[0189] A: The entire wound sheet can be separated from the tube container body and discarded;

[0190] B: The wound sheet can be partially separated from the tube container body and discarded;

[0191] C: The tube container body and the wound sheet cannot be separated and discarded.

[0192] <Evaluation of barrier properties of wound sheets>

[0193] The tube container with the winding sheet obtained by the above-mentioned manufacturing method (Example 1 and Comparative Examples 2 and 3) and the tube container body (Comparative Example 1) were sealed at 50 mm from the shoulder using an impulse heat sealer (FI-200-10W, Fuji Pulse Co., Ltd.), and the oxygen detection agent was filled from the mouth in a manner that prevents air from entering, and the tube was sealed with a top seal cap having a barrier property. After that, the tube filled with the oxygen detection agent was stored in a constant temperature and humidity chamber at 40°C and a relative humidity of 75%, and the color change was confirmed over time.

[0194] In addition, the oxygen detection agent changes from transparent to blue when exposed to oxygen. Specifically, it is manufactured as follows. That is, glucose is added to a 0.04% methylene blue aqueous solution to make it 1%, and the pH value is adjusted to about 10 with a 1N sodium hydroxide aqueous solution. The obtained solution is placed in a glass bottle and heated in a water bath at 95°C. The solution changes from blue to transparent. After that, agar powder is added little by little to make the concentration of agar 2%, and it is completely dissolved while gently stirring.

[0195] Sensory Evaluation Criteria for Barrier Properties

[0196] A: The oxygen detector has not completely changed color:

[0197] B: The oxygen detector changes color completely.

[0198] 〈Evaluation Results〉

[0199] The evaluation results of the above evaluation are shown in Table 1 below.

[0200] [Table 1]

[0201] Table 1

[0202]

[0203] As can be seen from Table 1, in the tube container of Example 1A, after the winding sheet is peeled off, the barrier layer of the winding sheet remains on the tube container body. Therefore, although the evaluation of the separation and disposal property of the tube container with the winding sheet is "B", the peelability of the winding sheet, the usability of the tube container with the winding sheet, the extrudability, and the barrier property (before and after the peeling of the winding sheet) are good ("A").

[0204] In addition, as can be seen from Table 1, in the tube container of Example 1B, after the winding sheet was peeled off, the barrier layer of the winding sheet did not remain on the tube container body. Therefore, although the sensory evaluation of the barrier property of the peeling of the winding sheet was "B", the evaluations of the separation and disposal property of the tube container with the winding sheet, the peeling property of the winding sheet, the usability of the tube container with the winding sheet, the extrudability, and the barrier property (before the peeling of the winding sheet) were good ("A").

[0205] On the other hand, as can be seen from Table 1, in the tube containers of Comparative Examples 1A to 3 having no barrier layer, the evaluation of the barrier properties (before and / or after the peeling of the wound sheet) was "B" in all cases.

[0206] 《Reference Examples 1 to 6》

[0207] In the reference examples and the reference comparative examples, the effect of joining the winding sheet to the main body of the tube container body in a winding state via the easily peelable sealant layer was confirmed.

[0208] As the laminated bodies for winding sheets of Reference Examples 1 to 6, laminated bodies having the following layer structures were prepared (wherein, " / / " indicates bonding by a dry laminating adhesive):

[0209] PETsiox (12μm) / / inkPET (12μm) / ac agent / EMAA (20μm) / easy-to-peel sealant layer (easy-to-peel sealant layer with cohesive failure in the layer) (20μm)

[0210] The easily peelable sealant layers of Reference Examples 1 to 6, that is, easily peelable sealant layers of the intralayer cohesive failure type that undergoes cohesive failure within the layer when the wound sheet is peeled, are polyethylene easily peelable sealants (7601EB manufactured by Toray Film Processing Co., Ltd.).

[0211] The layer structures of the tube container bodies (laminated tubes) of Reference Examples 1 to 5 are as follows:

[0212] (Surface) LLDPE (50 μm) / LDPEf (100 μm) / PET (12 μm) / EMAA (30 μm) / Al (9 μm) / EMAA (30 μm) / LLDPE (100 μm) (Content side)

[0213] The layer structure of the tube container body (blow molded tube) of Reference Example 6 is as follows:

[0214] (Surface side) LDPE (100 μm) / acid-modified resin (10 μm) / EVOH (20 μm) / acid-modified resin (10 μm) / LDPE (100 μm) (Content side)

[0215] In addition, the detailed meanings of the abbreviations of the above-mentioned layer structures are as follows:

[0216] PETsiox: PET layer with silicon oxide deposited on it

[0217] inkPET: PET layer with printing layer

[0218] AC agent: anchor coating adhesive

[0219] LLDPE: Linear low-density polyethylene resin layer

[0220] LDPEf: Low-density polyethylene resin film

[0221] PET: Polyethylene terephthalate layer

[0222] EMAA: Ethylene-methacrylic acid copolymer

[0223] Al: Aluminum foil layer

[0224] LDPE: Low-density polyethylene resin layer

[0225] EVOH: Ethylene-vinyl alcohol copolymer layer

[0226] <Manufacturing method>

[0227] In Reference Examples 1 to 6, a winding sheet laminate having approximately the same size as the main body of the above-mentioned tube container main body was used, and the tube container was pressed against a rotary hot roller (200° C.) with a force of 10 kgf via an easily peelable sealant layer to perform thermocompression bonding, thereby producing tube containers with winding sheets of Reference Examples 1 to 6.

[0228] In reference examples 1 to 4 and 6, the wound sheet is provided with a peeling opening (unfused portion). The location of each peeling opening is shown in FIG. Figure 3 In addition, the form of reference example 5 is shown in Figure 3 (e).

[0229] Reference Comparative Example 1

[0230] A tube container with a wrapping sheet of Reference Comparative Example 1 was prepared by wrapping a PET shrink label around the same blow tube as that of the tube container of Reference Example 6.

[0231] "evaluate"

[0232] As in the above-mentioned Examples and Comparative Examples, the releasability and feel of the sheet were evaluated.

[0233] Table 2 shows the structures and evaluation results of the tube containers with winding sheets of the reference examples and reference comparative examples.

[0234] [Table 2]

[0235]

[0236] As can be seen from Table 2, the tube containers with the winding sheet of Reference Examples 1 to 6 can all peel off the winding sheet and have good feel in use (squeeze followability). In particular, it can be seen that in Reference Examples 1 to 4 and 6, the winding sheet can be easily peeled off by using the winding sheet having a peeling start end.

[0237] 《Reference Example 7》

[0238] As a laminate for a winding sheet of Reference Example 7, a laminate having the following layer structure was prepared (wherein, " / / " indicates bonding by a dry lamination adhesive):

[0239] Paper (80g / m2) / / PET (12μm) / interfacial peeling type easy-to-peel sealant layer (20μm) / PE layer (sealant layer) (30μm)

[0240] The easily peelable sealant of Reference Example 7 includes an easily peelable sealant of interface peeling type and a polyethylene layer (sealant layer). When the easily peelable sealant of Reference Example 7 is peeled off after being heat-fused to the blown tube, the "easy peelable sealant of interface peeling type / polyethylene layer (sealant layer)" remains on the main body of the tube container body, and the "paper / / PET" is peeled off.

[0241] In addition, the interfacial peeling type easy-to-peel sealing layer is a layer composed of a mixed resin of LDPE and COC (LDPE:COC (mixing mass ratio) = 95:5), and Petrocene 226 (produced by Tosoh Corporation) is used as LDPE (low-density polyethylene), and APEL 6013B (produced by Mitsui Chemicals, Inc.) is used as COC (cyclic olefin random copolymer formed by addition polymerization).

[0242] As the tube container body (blow tube) of Reference Example 7, the same tube container body as that of Reference Example 6 was used.

[0243] The tube container with a winding sheet of Reference Example 7 was prepared in the same manner as the tube container with a winding sheet of Reference Example 6.

[0244] 《Comparative evaluation of reference examples 6 and 7》

[0245] As described above, in Reference Example 6, the easily peelable sealant layer is an easily peelable sealant layer of the intralayer cohesive failure type, and in Reference Example 7, the easily peelable sealant layer is an easily peelable sealant layer of the interfacial peeling type. Hereinafter, Reference Examples 6 and 7 are used to compare the additional effects when the peeling types are different.

[0246] More specifically, the winding sheet was peeled off via the peeling start end portion of the tube container with winding sheet of Reference Examples 6 and 7. Next, the "visibility of the contents" and "ease of extrusion" of each tube container were evaluated.

[0247] 〈Visibility of contents〉

[0248] The visibility of the contents of the main body of the tube container from which the winding sheet was peeled off was evaluated by obtaining a haze value based on Japanese Industrial Standard JISK 7361-1997. The smaller the haze value, the higher the transparency, which means that the visibility of the contents of the main body of the tube container is high. The evaluation criteria are as follows. The respective results are shown in Table 3.

[0249] A: Haze value is more than 80%;

[0250] B: The haze value is less than 70%.

[0251] (Ease of extrusion)

[0252] The ease of extrusion of the main body of the tube container from which the winding sheet was peeled off was compared based on the following criteria by manually extruding the contents (ginger paste) filled in each tube container. The respective results are shown in Table 3.

[0253] A: It is easier for the hand to slide when squeezing out, and the contents can be squeezed out smoothly;

[0254] B: The sliding of the hand when squeezing out is slightly worse than that of "A", and there is a sense of stagnation when squeezing out the contents.

[0255] [Table 3]

[0256] (Table 3

[0257]

[0258] As can be seen from Table 3, from the perspective of visibility of the contents, Reference Example 7 using an easily peelable resin of the interface peeling type is superior to Reference Example 6 using an easily peelable resin of the intralayer cohesive failure type, that is, an additional effect of being able to squeeze out the contents filled in the tube container while confirming it can be obtained.

[0259] Furthermore, it is found that from the perspective of ease of extrusion, Reference Example 6 using an easily peelable resin of the intralayer cohesive failure type is superior to Reference Example 7 using an easily peelable resin of the interfacial peeling type, and can achieve an additional effect of making it easier to extrude the contents filled in the tube container.

[0260] Description of Reference Numerals

[0261] 1. Barrier layer; 2a, 2b, easily peelable sealing layer; 3. Surface layer; 10. Winding sheet; 20. Main body of tube container body; 30. Shoulder of tube container body; 40. Spout of tube container body; 50. Tube container body; 100. Tube container with winding sheet.

Claims

1. A tube container with a winding sheet, comprising a tube container body and a winding sheet, wherein: The winding sheet has at least a barrier layer and is joined to the main body portion of the tube container body in a winding shape.

2. The tube container with a winding sheet according to claim 1, wherein: The barrier layer is a metal foil, a metal or metal compound vapor-deposited film, a vinyl alcohol polymer coating or film, a polyvinylidene chloride coating or film, or a combination thereof.

3. The tube container with a winding sheet according to claim 1 or 2, wherein: The winding sheet also has an easily peelable sealing layer.

4. The tube container with a winding sheet according to claim 3, wherein: The winding sheet also has a surface layer, Furthermore, the barrier layer is bonded to the surface layer via the easily peelable sealant layer on a surface opposite to the tube container body.

5. The tube container with a winding sheet according to claim 3, wherein: The barrier layer is bonded to the main body portion of the tube container body via the easily peelable sealant layer.

6. The tube container with a winding sheet according to any one of claims 3 to 5, wherein The winding sheet has a peeling open end portion.

7. The tube container with a winding sheet according to any one of claims 3 to 6, wherein: The winding sheet is provided with a spiral tear line with the tube container as an axis.

8. The tube container with a winding sheet according to any one of claims 3 to 7, wherein The winding sheet has a mark indicating that the winding sheet can be peeled off.

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