Tube container with wound sheet

Abstract

To provide a tube container with a wound sheet that can exhibit a barrier property with the wound sheet.SOLUTION: A tube container 100 with a wound sheet which has a tube container body 50 and a wound sheet 10 is provided, in which the wound sheet 10 has at least a barrier layer and is joined to a body part of the tube container body 50 in a winding shape.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a tube container with a wound sheet, and more particularly to a tube container with a wound sheet that has a tube container body and a wound sheet wound around the container. [Background technology]

[0002] Tube containers have traditionally been used as containers for a variety of products, including medicines, toothpaste, food, cosmetics, adhesives, etc. Tube containers are generally tube bodies formed from a synthetic resin tube blown or extruded into a cylindrical shape, or tube bodies formed by winding an aluminum laminate sheet into a cylindrical shape, and are often used by heat-sealing a head portion, with a nozzle extending from the upper opening of a cap-shaped shoulder portion, to the upper end of the cylindrical body, and then filling the container with the contents before heat-sealing the lower opening of the body.

[0003] Furthermore, with regard to such tube containers, tube containers with a wound sheet have been developed, in which a sheet is wound around the body of the tube container as a medium for information such as patterns and letters and / or as a decorative sheet for aesthetic purposes.

[0004] For example, Patent Document 1 discloses a method of labeling the surface with a decorative film using the residual heat while extruding the body of a tube container, which serves as the base.

[0005] Patent document 2 also discloses a tube container in which a heat-sensitive label decorated with a printing layer is adhered and fixed in a spiral shape by heat fusion within a predetermined height range on the outer peripheral surface of the barrel of a preformed tube container body.

[0006] Furthermore, Patent Document 3 discloses a decorated polyethylene tube container characterized in that a decorative (decorative) film is wrapped around the barrel of the polyethylene tube container body via an adhesive layer adjacent to the decorative layer, with the winding start and end overlapping. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Special Publication No. 2019-531928 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-105692 [Patent Document 3] Japanese Patent Application Publication No. 07-040515 Summary of the Invention [Problem to be solved by the invention]

[0008] It is believed that the tube containers with a rolled sheet disclosed in the above-mentioned Patent Documents 1 to 3 are all designed so that the decorative sheet (film or label) does not peel off or fall off from the tube container body.

[0009] In contrast to this, the present invention provides a tube container with a wound sheet that can exhibit barrier properties due to the wound sheet.

[0010] Here, the inventors have found that it is preferable to peel off some or all of the layers of the rolled sheet from the tube container body as necessary in the following circumstances: for example, when points or marks for a product campaign or prize draw are printed on the rolled sheet and it is necessary to cut off the points or marks in order to enter the campaign or prize draw, when it is necessary to soften the tube container and empty the contents inside the tube, or when it is necessary to separate the sheet and the tube container body for disposal or recycling.

[0011] Therefore, there is also a need for a tube container with a rolled sheet that allows some or all of the layers of the rolled sheet to be easily peeled off from the tube container body.

[0012] Shrink labels used on PET bottles and the like can be easily peeled off from the PET bottle. However, when such shrink labels are applied to tube containers, the shrink label floats up when the body of the tube container is squeezed to push out the contents, which creates a problem with the feel of use. [Means for solving the problem]

[0013] The present inventors have conducted extensive research and found that the above problems can be solved by the following means, and have completed the present invention. That is, the present invention is as follows.

[0014] <Aspect 1> A tube container with a wound sheet, comprising a tube container body and a wound sheet, The rolled sheet has at least a barrier layer and is wound around the barrel of the tube container body. Tube container with rolled sheet. <Aspect 2> 2. The tube container with a rolled 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-based coating or film, a polyvinylidene chloride-based coating or film, or a combination thereof. <Aspect 3> 3. The tube container with a wound sheet according to claim 1 or 2, wherein the wound sheet further comprises an easily peelable sealant layer. <Aspect 4> The rolled sheet further has a surface layer; and the barrier layer is bonded to the surface layer via the easily peelable sealant layer on the surface opposite to the tube container body; A tube container with the wound sheet according to embodiment 3. <Aspect 5> Aspect 4. A tube container with a wound sheet according to aspect 3, wherein the barrier layer is bonded to the barrel of the tube container body via the easily peelable sealant layer. <Aspect 6> 6. The tube container with a wound sheet according to any one of aspects 3 to 5, wherein the wound sheet has a peeling trigger. <Aspect 7> 7. The tube container with a wound sheet according to any one of aspects 3 to 6, wherein the wound sheet is provided with a spiral perforation with the tube container as an axis. <Aspect 8> 8. The tube container with a rolled sheet according to any one of aspects 3 to 7, wherein the rolled sheet has an indication that the rolled sheet is peelable. [Effects of the Invention]

[0015] According to the tube container with the wound sheet of the present invention, the wound sheet can exhibit barrier properties. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a front view showing one embodiment of a tube container with a rolled sheet of the present invention. [Figure 2] FIG. 2 is a schematic cross-sectional view of the body of the tube container body and the heat-sealed rolled sheet in two embodiments of the tube container with rolled sheet of the present invention. [Figure 3] FIG. 3 is an image diagram showing the peel trigger state of each of the tube containers with the wound sheet of Reference Examples 1 to 6. DETAILED DESCRIPTION OF THE INVENTION

[0017] <Tube container with rolled sheet> The tube container with a wound sheet of the present invention comprises: A tube container with a wound sheet, comprising a tube container body and a wound sheet, The rolled sheet has at least a barrier layer and is wound around the barrel of the tube container body. Tube container with rolled sheet is.

[0018] That is, as shown in FIG. 1, which is a front view showing one embodiment of the tube container with a rolled sheet of the present invention (hereinafter also simply referred to as "the tube container of the present invention"), the tube container with a rolled sheet 100 of the present invention has a tube container body 50 and a rolled sheet 10, and the rolled sheet 10 has at least a barrier layer and is rolled and joined to the barrel portion 20 of the tube container body 50.

[0019] In the present invention, the "barrier layer" is any layer that has a higher barrier property against components of the tube contents, oxygen, water vapor, etc. than the tube container body.

[0020] Here, the barrier layer may be, for example, a metal foil, a metal or metal compound vapor-deposited film, a vinyl alcohol polymer-based coating or film, a polyvinylidene chloride (PVDC)-based coating or film, or a combination thereof. Here, the metal foil may be an aluminum foil. The metal or metal compound vapor-deposited film may be an aluminum vapor-deposited film, a silica vapor-deposited film, or a combination thereof. The vinyl alcohol polymer-based coating or film may be a polyvinyl alcohol (PVOH) coating or film, an ethylene-vinyl alcohol copolymer (EVOH) coating or film, or a combination thereof. In the ethylene-vinyl alcohol copolymer (EVOH), the proportion of vinyl alcohol monomer may be 50 mol% or more. In addition, the polyvinylidene chloride-based coating or film may be a vinylidene chloride-containing copolymer, particularly a copolymer of vinylidene chloride with vinyl chloride, an acrylic ester, or acrylonitrile. In the vinylidene chloride-containing copolymer, the proportion of vinylidene chloride monomer may 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 a laminated state on a polymer film used as a substrate.

[0021] 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 1 μm or more, 3 μm or more, or 5 μm or more, and may be 100 μm or less, 50 μm or less, 40 μm or less, 30 μm or less, 20 μm or less, or 10 μm or less. When the barrier layer is a metal or metal compound vapor-deposited film, the thickness of the barrier layer may be 1 nm or more, 10 nm or more, 30 nm or more, or 50 nm or more, and may be 1 μm or less, 500 nm or less, or 300 μm or less. When the barrier layer is a vinyl alcohol polymer-based coating or a polyvinylidene chloride (PVDC)-based coating, the thickness of the barrier layer may be 100 nm or more, 300 nm or more, or 500 nm or more, and 10 μm or less, 5 μm or less, or 1 μm or less. When the barrier layer is a vinyl alcohol polymer-based film or a polyvinylidene chloride (PVDC)-based film, the thickness of the barrier layer may be 1 μm or more, 3 μm or more, 5 μm or more, or 10 μm or more, and may be 100 μm or less, 50 μm or less, 40 μm or less, 30 μm or less, 20 μm or less, or 10 μm or less.

[0022] In the present invention, the state in which the rolled sheet is joined in a rolled shape to the barrel of the tube container body refers to a state in which the rolled sheet is joined in a rolled shape, regardless of the method of wrapping the rolled sheet around the barrel of the tube container body. Therefore, the joined portion may be joined all over the surface or in a striped pattern.

[0023] In the present invention, the rolled sheet may or may not further include a peelable sealant layer. The barrier layer may be bonded to the barrel of the tube container body via a peelable sealant layer, or may be bonded to the barrel of the tube container body without a peelable sealant layer.

[0024] When the barrier layer is bonded to the body of the tube container body without an easily peelable sealant layer, the barrier layer may be bonded to the body directly by heat sealing or the like, or may be bonded to the body via an adhesive layer made of a pressure-sensitive adhesive, an adhesive layer made of an adhesive, or a heat-seal layer made of a thermoplastic resin. Examples of adhesives that can be used here include dry laminating adhesives, anchor coating adhesives, water-soluble adhesives, emulsion adhesives, and non-solvent laminating adhesives. Polyolefins, particularly polyethylene-based resins and polypropylene-based resins, can be used for the heat-sealing layer.

[0025] In the present invention, the rolled sheet may or may not further have a surface layer. Here, in the present invention, the "surface layer" means a layer or laminate (excluding a bonding layer such as an easily peelable sealant layer, pressure-sensitive adhesive layer, adhesive layer, or heat-sealing layer adjacent to the barrier layer) that is outside the barrier layer among the layers that make up the rolled sheet.

[0026] In the present invention, the rolled sheet may or may not further include an inner layer. Here, in the present invention, the "inner layer" means a layer or laminate (excluding a bonding layer such as an easily peelable sealant layer, pressure-sensitive adhesive layer, adhesive layer, or heat-sealing layer adjacent to the barrier layer) that is located inside the barrier layer among the layers that make up the rolled sheet.

[0027] When the rolled sheet has an easily peelable sealant layer, the rolled 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.

[0028] 2(a), which is a schematic cross-sectional view of the rolled sheet, the rolled sheet 10 is a laminate in which a surface layer 3, an easily peelable sealant 2a, and a barrier layer 1 are laminated in this order, and is wound around the barrel 20 of the tube container body. In this embodiment, the surface layer 3 and the barrier layer 1 are joined via the easily peelable sealant 2a. Therefore, when the rolled sheet is peeled from the tube container with the rolled sheet, the surface layer 3 and the barrier layer 1 separate, resulting in the surface layer 1 and the tube container body having the barrier layer 1.

[0029] In addition, when the rolled sheet has an easily peelable sealant layer, the barrier layer may be bonded to the barrel of the tube container body via the easily peelable sealant layer.

[0030] 2(b), which is a schematic cross-sectional view of the rolled sheet, the rolled sheet 10 is a laminate in which a surface layer 3, a barrier layer 1, and an easily peelable sealant 2a are laminated in this order, and is wound around the barrel 20 of the tubular container body. In this embodiment, the barrier layer 1 and the barrel 20 of the tubular container body are joined via the easily peelable sealant 2b. Therefore, when the rolled sheet is peeled from the tubular container with the rolled sheet, the barrier layer 1 and the barrel 20 of the tubular container body separate, resulting in a laminate having the surface layer 1 and the barrier layer 1, and the tubular container body being separated.

[0031] As described above, in the tube container with rolled sheet 100 of the present invention, the rolled sheet 10 is rolled and joined to the barrel 20 of the tube container body, so that the rolled sheet 10 does not float even when the barrel 20 is squeezed, resulting in a good usability. Furthermore, when peeling the rolled sheet 10, the rolled sheet 10 can be easily peeled off in whole or in part from the tube container due to cohesive failure of the easily peelable sealant layers 2a, 2b, etc.

[0032] The tube container with a rolled sheet of the present invention has a rolled sheet having a surface layer and / or an inner layer wound around the tube container body, and thereby can provide the effects of the surface layer and / or the inner layer to the tube container body.

[0033] Specifically, for example, the surface layer and / or the inner layer, especially the surface layer, can be used as a medium for information such as patterns and letters and / or as a decoration for aesthetic purposes.

[0034] Furthermore, the tube container of the present invention can have one or more of the following advantages (1) to (9) by using a wound sheet, by the wound sheet having a surface layer and / or an inner layer, and / or by the wound sheet having an easily peelable sealant layer.

[0035] (1) Improving barrier properties In the tube container of the present invention, the wound sheet has a barrier layer, which can improve the barrier properties of the entire tube container.

[0036] (2) Use of various decorative layers In the tube container of the present invention, the surface layer and / or inner layer, especially the surface layer, has a decorative layer, which makes it possible to use decorative layers that were difficult to use in conventional laminated tubes, such as embossed PET film and PET film with a hologram vapor deposition film.

[0037] (3) Improved production efficiency / small lot handling Conventional blown tubes and laminated tubes have a printed layer formed by direct printing. Therefore, for example, if a pattern is to be changed, a new printing plate is required. In contrast, the tube container of the present invention uses a rolled sheet, so that the pattern can be changed simply by switching the printed rolled sheet.

[0038] Furthermore, with regard to printing, the tube container of the present invention does not form side seams with a laminate like conventional laminated tubes, so it is possible to use printing methods such as digital printing, which are functionally insufficient when considering conventional side seams (in this case, the laminate strength and ink adhesion are insufficient).

[0039] Therefore, with the tube container of the present invention, digital printing not only enables small-lot production of a wide variety of products and short delivery times, but also leads to a reduction in defectively printed products.

[0040] (4) Thinning the tube body and reducing the amount of resin used In the tube container of the present invention, by wrapping a highly rigid winding sheet around the barrel of the tube container body, the tube container can be made self-supporting even if the tube container body is made thin-walled.

[0041] Furthermore, in the tube container of the present invention, the amount of resin used to form the tube container body can be reduced by making the tube container body thinner.

[0042] (5) Improved separation and disposal of tube containers Conventionally, tube containers with a wound sheet, in which the wound sheet and the tube container body cannot be separated, have generally been disposed of as combustible waste. In contrast, when an easily peelable sealant layer is used in the wound sheet, the tube container of the present invention can be disposed of by separating the wound sheet and the tube container body. This separate disposal can also reduce the amount of combustible waste.

[0043] (6) Easy disposal When an easily peelable sealant layer is used in the rolled sheet, the tube container of the present invention can be disposed of compactly by thinning the wall of the tube container body.

[0044] (7) Contributes to the end of use (squeezability) When an easily peelable sealant layer is used in the rolled sheet, the rolled sheet can be peeled off in the tube container of the present invention, making it easier to squeeze out the contents from the relatively softened tube container body (the final product can be made thin and easy to squeeze).

[0045] (8) Providing additional information such as advertisements and leaflets When an easily peelable sealant layer is used in the rolled sheet, in the tube container of the present invention, the overlapping portion of the rolled sheet can be made longer (larger) so that additional information such as advertising or a package insert can be provided in this portion.

[0046] (9) Information on product campaigns and lotteries on the wrapping sheet When an easily peelable sealant layer is used in the rolled sheet, in the tube container of the present invention, by writing product campaign information or a "lottery" or the like on the rolled sheet, it is possible to peel off the rolled sheet and make it easy to enter the lottery.

[0047] Each component of the tube container with a wound sheet of the present invention will be described below.

[0048] <Wound sheet> The rolled sheet of the present invention has at least a barrier layer and can optionally further have a surface layer, an inner layer, and an easily peelable sealant layer. The layers of the rolled sheet of the present invention may be joined to each other directly by heat sealing or via a joining layer such as an adhesive layer, a bonding layer, or a heat sealing layer.

[0049] (surface and inner layers) As described above, in the present invention, the "surface layer" refers to a layer or laminate that is located outside the barrier layer among the layers that make up the rolled sheet (excluding bonding layers such as an easy-peel sealant layer, a pressure-sensitive adhesive layer, an adhesive layer, and a heat-seal layer that are adjacent to the barrier layer). Also, in the present invention, the "inner layer" refers to a layer or laminate that is located inside the barrier layer among the layers that make up the rolled sheet (excluding bonding layers such as an easy-peel sealant layer, a pressure-sensitive adhesive layer, an adhesive layer, and a heat-seal layer that are adjacent to the barrier layer).

[0050] The "surface layer" and "inner layer" may be layers that provide the rolled sheet of the present invention with suitable handleability, strength, durability, etc., and also function as a support for printing. Therefore, the surface layer and inner layer may be a single layer, or may be a laminate of multiple layers.

[0051] The materials constituting the surface layer and the inner layer are not particularly limited, and may be selected from materials having sufficient flexibility to conform to the squeeze deformation of the tube container without causing discomfort. Furthermore, the material constituting the surface layer may be selected from materials that can withstand the heat used in heat sealing, since the joining of the wound sheet with the easily peelable sealant layer is performed by heat sealing.

[0052] In the present invention, the thickness of the surface layer and the inner layer is not particularly limited, and may be, for example, 1 μm or more, 5 μm or more, 10 μm or more, or 20 μm or more from the viewpoint of imparting durability to the wound sheet, and may be 100 μm or less, 50 μm or less, 40 μm or less, or 30 μm or less from the viewpoint of imparting flexibility to the sheet.

[0053] In the present invention, the surface layer and the inner layer may have one or more film layers or paper layers.

[0054] More specifically, examples of films used in the surface layer and the inner layer include polyethylene films, polypropylene films, and polyester films, particularly polypropylene films such as biaxially oriented polypropylene films, and polyester films such as biaxially oriented polyethylene terephthalate films.

[0055] The surface layer and the inner layer may further include layers other than the film layer or the paper layer for the purpose of imparting additional functions, such as, but not limited to, a heat insulating layer such as a foamed polymer layer or a fiber layer, an adhesive layer such as a urethane adhesive, and the like.

[0056] The surface layer may have text information, symbols, marks, etc. printed on the surface of one or more layers constituting the surface layer. The surface layer may also have a decorative layer that can be observed from the outside of the tube container when the rolled sheet of the present invention is wound around the tube container body, thereby decorating the appearance of the tube container, particularly a decorative layer that decorates (decorates) the appearance with a pattern, color, gloss, etc. In relation to the present invention, a layer that is printed with only text information, symbols, marks, etc., but does not decorate the appearance with a pattern, color, gloss, etc., does not fall under the category of a "decorative layer."

[0057] The decorative layer may be any of the following or a combination thereof: Printed film or paper layer -Coated film or paper layer Decorative film or paper layers (e.g., matte film layers, polarized film layers, embossed film layers, colored film or paper layers)

[0058] (Easy-peel sealant layer) In the present invention, the term "easily peelable sealant layer" refers to a layer that allows easy manual peeling of part or all of the layers constituting the rolled sheet from a state in which the rolled sheet is heat-sealed to the barrel of the tube container body. In the present invention, the peel strength when peeling the rolled sheet 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, or 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. The term "peel strength" refers to the peel strength measured when peeled at a 180° angle according to, for example, the method specified in JIS-Z-0238.

[0059] In the present invention, the thickness of the easily peelable sealant layer is not particularly limited and can be selected in consideration of usability (squeeze durability) when using the tube container, ease of peeling when peeling off part or all of the layers constituting the rolled 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.

[0060] 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, 3 or more, or 4 or more layers, and 6 or less, or 5 or less layers).

[0061] In the present invention, the easily peelable sealant layer may be an easily peelable sealant layer of intralayer cohesive failure type, or an easily peelable sealant layer of interfacial peeling type.

[0062] In the present invention, an "intralayer cohesive failure type peelable sealant layer" refers to an easily peelable sealant layer in which, when the rolled sheet is peeled off from the barrel of the tube container body, the inside of the easily peelable sealant layer, which is a single layer, breaks, or the inside of one of the layers that make up the easily peelable sealant layer, which is a laminate of multiple layers, breaks, with a part of the broken easily peelable sealant layer remaining on the tube container body side and another part of the broken easily peelable sealant layer remaining on the rolled sheet side.

[0063] In the present invention, when the peelable sealant layer is of the intralayer cohesive failure type, the barrel of the tube container body after the winding sheet is removed becomes more slippery to human fingers, making it easier to squeeze the tube container body after the winding sheet is removed to squeeze out the contents remaining in the tube container body. Here, it is thought that this improved slipperiness is due to the fact that the ruptured peelable sealant layer remaining on the surface of the tube container body reduces the friction that occurs when the tube container body is squeezed with fingers.

[0064] In the present invention, an "interface peelable sealant layer" refers to a layer that peels off at the interface between the peelable sealant layer and an adjacent layer, at the interface between the peelable sealant layer and the tube container body, or at the interface between multiple layers that make up the peelable sealant layer, which is a laminate of multiple layers, when the rolled sheet is peeled off from the barrel of the tube container body. Therefore, with an "interface peelable sealant layer", when the rolled sheet is peeled off from the tube container body, the peelable sealant layer may remain on the tube container side, the peelable sealant layer may remain on the rolled sheet side, or a part of the peelable sealant layer may remain on the tube container side and the remainder of the peelable sealant layer may remain on the rolled sheet side.

[0065] In the present invention, when the easily peelable sealant layer is an interface peelable type, the transparency of the barrel of the tube container body can be maintained after peeling, and therefore it is preferred to use it in combination with a transparent blown tube container. In particular, even if the easily peelable sealant layer remains on the tube container body side, the transparency of the barrel of the tube container body after peeling can be maintained because the surface of the easily peelable sealant layer is smooth.

[0066] In the present invention, the material constituting the easy-peel sealant layer is not particularly limited, but may be appropriately determined based on the type, for example, "intralayer cohesive failure type easy-peel sealant layer" or "interfacial peeling type easy-peel sealant layer."

[0067] More specifically, the material constituting the intralayer cohesive failure type easy peel sealant layer may be selected from polyolefin resins, for example.

[0068] More specifically, examples of polyolefin-based resins include ethylene-based resins such as low-density polyethylene (LDPE), medium-density polyethylene (MDPE), linear low-density polyethylene (LLDPE), ethylene-vinyl acetate copolymer (EVA), and ethylene-α-olefin copolymer; polypropylene-based resins such as homopolypropylene, propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer; and polybutene. The polyolefin-based resin may be composed of a single material or a blend of these materials as the main raw material. It is preferable to select a material from these materials that can be heat-sealed to the tube container body.

[0069] The material for forming the interface peelable sealant layer may be selected from a mixture of a polyolefin resin and a cyclic olefin copolymer in any ratio, and the ratio of the cyclic olefin copolymer to the total of the polyolefin resin and the cyclic olefin copolymer may 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.

[0070] Here, a cyclic olefin copolymer refers to a polymer in which a cyclic olefin is used as a monomer and which has a saturated hydrocarbon ring structure in the main chain or side chain of the polymer. The cyclic olefin copolymer is preferably a copolymer containing at least one cyclic olefin and at least one vinyl compound other than the cyclic olefin as monomers. The cyclic olefin copolymer may be a cyclic olefin random copolymer (COC) obtained by addition polymerization using at least one cyclic olefin and at least one vinyl compound other than the cyclic olefin as monomers, or a cyclic olefin ring-opening polymer or its hydrogenated product (COP) obtained by ring-opening polymerization using at least one compound having a double bond in a fused ring skeleton and at least one unsaturated compound other than the compound as monomers.

[0071] When the cyclic olefin copolymer is a cyclic olefin random copolymer (COC) obtained by addition polymerization, the cyclic olefin serving 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.

[0072] Furthermore, the vinyl compound other than the cyclic olefin that serves as a comonomer for 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 or the like with two unsaturated bonds; and linear or branched dienes such as butadiene and isoprene.

[0073] When a cyclic olefin random copolymer (COC) is used as the material constituting the interface peelable type easy peel sealant layer, the proportion of structural units derived from the cyclic olefin is preferably 15 to 60 mol %, more preferably in the range of 25 to 50 mol %.

[0074] In addition, when the cyclic olefin copolymer is a cyclic olefin ring-opening polymer or its hydrogenated product (COP) obtained by ring-opening polymerization, the compound having a double bond in the condensed ring skeleton to be used as the monomer is not particularly limited as long as it can be polymerized by the metasense polymerization catalyst. For example, compounds having a norbornene skeleton such as tetracyclododecene, norbornene, or derivatives thereof can be used.

[0075] In addition, the unsaturated compound other than the compound having a double bond in the fused ring skeleton, which is used as a comonomer of the cyclic olefin ring-opening polymer, is not particularly limited as long as it can be polymerized by the Metasense polymerization catalyst. For example, the cyclic olefin, which is used as a monomer of the above-mentioned cyclic olefin random copolymer (COC), cyclic diene, monomer having a carbon-carbon double bond in the main chain, and derivatives thereof can be mentioned.

[0076] The cyclic olefin ring-opening polymer has a carbon-carbon double bond (C=C) in the main chain. When hydrogenated, a hydrogenated product (COP) can be obtained in which the double bond in the main chain is converted to a carbon-carbon single bond (CC). From the viewpoints of heat resistance, weather resistance, etc., a polymer in which at least the carbon-carbon double bond in the main chain is hydrogenated is also acceptable.

[0077] When a cyclic olefin ring-opening polymer or a hydrogenated product thereof (COP) is used, the proportion of structural units derived from a compound having a double bond in the fused ring skeleton is preferably 80 mass% or more, taking into consideration that the polymer will be subjected to a hydrogenation reaction.

[0078] (Method for manufacturing rolled sheet) In the roll sheet of the present invention, the method for forming the laminate in which the barrier layer and any other layer are laminated is not particularly limited, and for example, dry lamination, sand lamination, or co-extrusion film forming may be used. Note that commercially available sheet molded products may be used as they are for each layer or the laminate.

[0079] (Peeling trigger) In the present invention, when the rolled sheet further has an easily peelable sealant layer, from the viewpoint of improving the ease of peeling of the rolled sheet, the rolled sheet may have a peel trigger, or may be provided with a spiral perforation with the tube container body as its axis, or may have both.

[0080] The rolled sheet can be more easily peeled off from the tube container body by providing a peel trigger, and it is particularly preferable for the rolled sheet to have a peel trigger when the tube container body has a surface containing a metal material.

[0081] In the present invention, the peel trigger is not particularly limited and may be, for example, the following: (i) when the rolled sheet is heat-sealed to the barrel of the tube container body, a region in the easily peelable sealant layer of the rolled sheet that is not heat-sealed or a region that is heat-sealed more weakly than other regions can be used as the peel trigger; (ii) a welding-inhibiting layer such as a release varnish can be provided on a part of the easily peelable sealant layer of the rolled sheet, and this can be used as the peel trigger.

[0082] Furthermore, from the viewpoint of improving the ease of peeling of the rolled sheet, it is preferable that at least a portion of the peel trigger is present at the seam of the rolled sheet. Here, the seam of the rolled sheet refers to the opposing or overlapping portion of both ends of the sheet in the rolling direction when the rolled sheet is heat-sealed in a rolled state to the barrel of the tube container body. That is, the both ends of the rolled sheet may be (i) spaced apart by a certain distance, (ii) tightly connected, or (iii) overlapped. For example, when the rolled sheet has an easy-peel sealant layer that undergoes cohesive failure within the layer upon peeling, the seam may be any of the above types (i) to (iii). Furthermore, when the rolled sheet has an easy-peel sealant layer that undergoes interfacial peeling upon peeling, the seam is preferably of the above type (i) or (ii).

[0083] (display) In the present invention, when the rolled sheet further has an easily peelable sealant layer, the rolled sheet may have a marking indicating that the rolled sheet is peelable. More specifically, the rolled sheet may be marked with a marking indicating that the rolled sheet is peelable, a peeling method, that the rolled sheet can be peeled and disposed of separately, or that the rolled sheet can be peeled and used to apply, etc. Such a marking can provide convenience to users, etc.

[0084] The rolled sheet may also have a marking indicating that the rolled sheet can be peeled off from the tube container body by pressing the side of the winding start portion near the overlapping portion.

[0085] Such markings can be printed on one or more layers constituting the surface layer, and the marking form may be a display using only letters, only symbols, marks, etc., or a combination of these.

[0086] <Tube container body> In the present invention, the tube container is used as a container for filling contents such as medicines, toothpaste, food, cosmetics, adhesives, etc. In particular, in the present invention, the tube container is used as a container for filling contents such as food, medicines, toothpaste, cosmetics, adhesives, etc. that are sensitive to oxygen or moisture, thereby allowing the contents to remain relatively unaffected by oxygen or moisture for a relatively long period of time. Examples of foods that are sensitive to oxygen or moisture include seasonings such as wasabi.

[0087] The tube container body has a body portion and a spout portion. Depending on the design, practicality, etc., it may further have, for example, a shoulder portion between the body portion and the spout portion. For example, as shown in Fig. 1, the tube container body 50 has a body portion 20, a shoulder portion 30, and a spout portion 40.

[0088] In the present invention, the tube body may be a laminate tube, a single-layer or multi-layer extruded tube, or a single-layer or multi-layer blown tube. The laminate or single layer forming the tube body may include a layer made of a resin material and a layer made of a metal material. When the tube body is formed of multiple layers, the layers may contain the same material or different materials.

[0089] <<Method for manufacturing a tube container with a wound sheet>> The method for producing the tube container with the wound sheet of the present invention is not particularly limited.

[0090] Therefore, for example, the tube container with a wound sheet of the present invention can be produced by preparing a tube container body and a wound sheet, and then using a rotary heat roll to heat-seal the wound sheet in a wound shape around the body of the tube container body by aligning the heat-seal layer, which is the innermost layer of the wound sheet, facing the body of the tube container body and thermocompressing it.

[0091] The temperature during thermocompression bonding is not particularly limited and may be, for example, 100 to 300° C. The force during thermocompression bonding is not particularly limited and may be, for example, 5 to 20 kgf.

[0092] When the innermost layer is not a heat seal layer, the bonding can be performed using an adhesive layer made of a pressure sensitive adhesive or an adhesive layer made of an adhesive. [Example]

[0093] EXAMPLES The present invention will be described below using examples and comparative examples, but the present invention is not limited to these.

[0094] Examples and Comparative Examples As the wound sheets of the Examples and Comparative Examples, laminates having the following layer configurations were prepared (note that " / / " indicates adhesion with a dry lamination adhesive). However, in Comparative Example 1, no wound sheet was used.

[0095] Example 1A PET layer (12 μm) / easy-peel sealant layer (20 μm) / / AL layer (9 μm) / / PET layer (12 μm) / / LLDPE layer (20 μm) ... total thickness 73 μm Example 1B PET layer (12 μm) / / AL layer (9 μm) / / PET layer (12 μm) / / easy-peel sealant layer (20 μm) ... total thickness 53 μm

[0096] Comparative Example 1 No wound sheet Comparative Example 2 LLDPE layer (80μm) … Total thickness 80μm Comparative Example 3 PET layer (12 μm) / easy-peel sealant layer (30 μm) / LDPE layer (50 μm) ... total thickness 92 μm

[0097] The details of each layer structure described above are as follows: PET layer: polyethylene terephthalate layer AL layer: aluminum foil layer LDPE layer: Low density polyethylene layer Easy-peel sealant layer: Toray Advanced Film 7601EB (intralayer cohesive failure type easy-peel sealant for polyethylene) LLDPE layer: Linear low-density polyethylene layer

[0098] The layer structure of the blow tube used as the tube container body in the examples and comparative examples is as follows, from the outside to the content side: Surface: LDPE layer (100 μm) / acid-modified resin layer (10 μm) / EVOH layer (20 μm) / acid-modified resin layer (10 μm) / LDPE layer (100 μm) Contents side

[0099] The details of each layer structure described above are as follows: LDPE layer: Low density polyethylene layer Acid-modified resin layer: Acid-modified polyethylene layer EVOH layer: Ethylene vinyl alcohol resin layer

[0100] <Method for manufacturing a tube container with a wound sheet> The wound sheets of the Examples and Comparative Examples, each having approximately the same dimensions as the body of the above-mentioned tube container body, were pressed against a rotary heat roll (200°C) with a force of 10 kgf to heat and press the tube container through an easily peelable sealant layer, thereby producing tube containers with wound sheets of the Examples and Comparative Examples.

[0101] "evaluation" <Usability evaluation of tube containers with rolled sheets> The tube containers with the winding sheet of the Examples and Comparative Examples were filled with orange juice as the contents, the bottom end was sealed with an ultrasonic seal, and the containers were placed in a freezer at -20°C for 24 hours to freeze the orange juice into a sherbet-like state. The tube containers with the winding sheet of the Examples and Comparative Examples were then squeezed to extract the contents, and the usability (squeezeability) was evaluated according to the following criteria.

[0102] Usability evaluation criteria A: No lifting or peeling of the wound sheet occurred. B: Lifting or peeling of the wound sheet occurred.

[0103] <Evaluation of peelability of rolled sheet> After squeezing out the contents as in the evaluation method for usability evaluation, the rolled sheet was peeled off, and the peelability of the rolled sheet was evaluated based on the following criteria.

[0104] Peelability evaluation criteria A: It was easily peeled off by hand. B: Peeling was difficult.

[0105] <Evaluation of the separate disposal of tube containers with rolled sheets> The tube container with the wound sheet was evaluated based on the following criteria to determine whether the tube container body and the wound sheet could be separated and discarded.

[0106] Evaluation criteria for separable disposal A: The entire rolled sheet could be separated from the tube container body and discarded. B: A part of the rolled sheet could be separated from the tube container body and discarded. C: The tube container body and the wound sheet could not be separated and discarded.

[0107] <Barrier property evaluation of rolled sheet> The tube containers with wound sheets (Example 1, and Comparative Examples 2 and 3) obtained by the above-mentioned manufacturing method and the tube container body (Comparative Example 1) were sealed 50 mm from the shoulder using an impulse sealer (FI-200-10W, Fuji Impulse Co., Ltd.), filled to the fullest with an oxygen detector so that air would not enter through the opening, and then sealed with a barrier top seal lid. Thereafter, the tubes filled to the fullest with the oxygen detector were stored in a constant temperature and humidity chamber at 40°C and a relative humidity of 75%, and the color change over time was observed.

[0108] The oxygen detector changes color from clear to blue upon contact with oxygen, and was specifically produced as follows: Glucose was added to a 0.04% methylene blue solution to make a 1% concentration, and the pH was adjusted to approximately 10 with a 1N sodium hydroxide solution. The resulting solution was placed in a glass bottle and heated in a 95°C water bath. After the solution changed color from blue to clear, agar powder was added little by little so that the agar concentration became 2%, and the solution was completely dissolved by gently stirring.

[0109] Sensory evaluation criteria for barrier properties A: The oxygen detector has not completely changed color. B: The oxygen detector did not completely change color.

[0110] <Evaluation Results> The evaluation results of the above evaluations are shown in Table 1 below.

[0111] [Table 1]

[0112] As is clear from Table 1, in the tube container of Example 1A, the barrier layer of the rolled sheet remained on the tube container body after the rolled sheet was peeled off, so the evaluation of the ease of separation and disposal of the tube container with the rolled sheet was "B". However, the evaluation of the ease of peeling off the rolled sheet, the usability, squeezability, and barrier properties (before and after peeling off the rolled sheet) of the tube container with the rolled sheet were good ("A").

[0113] Furthermore, as is clear from Table 1, in the tube container of Example 1B, the barrier layer of the wound sheet did not remain on the tube container body after the wound sheet was peeled off, so the sensory evaluation of the barrier property after peeling off the wound sheet was "B". However, the evaluations of the ease of separation and disposal of the tube container with the wound sheet, the ease of peeling off the wound sheet, the usability of the tube container with the wound sheet, the squeezing ability, and the barrier property (before peeling off the wound sheet) were good ("A").

[0114] In contrast, as is clear from Table 1, the barrier properties (before and / or after peeling of the wound sheet) of the tube containers of Comparative Examples 1A to 3, which did not have a barrier layer, were all evaluated as "B."

[0115] 《Reference examples 1~6》 In the reference example and the reference comparative example, the effect of joining the rolled sheet in a rolled state to the barrel of the tube container body via the easily peelable sealant layer is confirmed.

[0116] As laminates for rolled sheets of Reference Examples 1 to 6, laminates having the following layer configurations were prepared (note that " / / " indicates adhesion with a dry lamination adhesive): PETsiox (12 μm) / / inkPET (12 μm) / ac agent / EMAA (20 μm) / easy-peel sealant layer (intralayer cohesive failure type easy-peel sealant layer) (20 μm)

[0117] The easily peelable sealant layers of Reference Examples 1 to 6, i.e., the easily peelable sealant layers of the intralayer cohesive failure type that undergo cohesive failure within the layer when the rolled sheet is peeled off, are polyethylene easy peel sealants (7601EB manufactured by Toray Advanced Film Co., Ltd.).

[0118] The layer structures of the tube container bodies (laminated tubes) of Reference Examples 1 to 5 are as follows: (Front side) LLDPE(50μm) / LDPEf(100μm) / PET(12μm) / EMAA(30μm) / Al(9μm) / EMAA(30μm) / LLDPE(100μm)(Contents side)

[0119] The layer structure of the tube container body (blow tube) of Reference Example 6 is as follows: (Front) LDPE (100 μm) / Acid-modified resin (10 μm) / EVOH (20 μm) / Acid-modified resin (10 μm) / LDPE (100 μm) (Contents side)

[0120] The details of the abbreviations for each layer structure mentioned above are as follows: PETsiox: Silicon oxide-deposited PET layer inkPET: PET layer with printed layer AC agent: anchor coat adhesive LLDPE: Linear low density polyethylene resin layer LDPEf: Low-density polyethylene resin film PET: Polyethylene terephthalate layer EMAA: ethylene-methacrylic acid copolymer Al: Aluminum foil layer LDPE: Low density polyethylene resin layer EVOH: Ethylene-vinyl alcohol copolymer layer

[0121] <Manufacturing method> In Reference Examples 1 to 6, a laminate for a wound sheet having approximately the same dimensions as the body of the above-mentioned tube container body was used, and the tube container was pressed against a rotary heat roll (200°C) with a force of 10 kgf via an easily peelable sealant layer to be thermocompressed, thereby producing the tube containers with wound sheets of Reference Examples 1 to 6.

[0122] In Reference Examples 1 to 4 and 6, a peel trigger (unwelded portion) was provided on the wound sheet. The locations of the peel triggers are shown in (a) to (d) of Figure 3. The embodiment of Reference Example 5 is shown in (e) of Figure 3.

[0123] Comparative Example 1 A PET shrink label was wrapped around the same blown tube as the tube container of Reference Example 6 to prepare a tube container with a wound sheet of Reference Comparative Example 1.

[0124] "evaluation" The peelability and feel of the sheet were evaluated in the same manner as in the above Examples and Comparative Examples.

[0125] The configurations and evaluation results of the tube containers with wound sheets of the respective reference examples and reference comparative examples are shown in Table 2.

[0126] [Table 2]

[0127] As is clear from Table 2, the wound sheet could be peeled off from all of the tube containers with wound sheets of Reference Examples 1 to 6, and the feeling of use (squeeze response) was also good. In particular, in Reference Examples 1 to 4 and 6, the wound sheet was found to be easily peeled off by using a wound sheet having a peel trigger.

[0128] 《Reference example 7》 As a laminate for a rolled sheet of Reference Example 7, a laminate having the following layer structure was prepared (note that " / / " indicates adhesion with a dry lamination adhesive): Paper (80g / m 2 ) / / PET (12 μm) / interface peelable sealant layer (20 μm) / PE layer (sealant layer) (30 μm)

[0129] The easily peelable sealant layer of Reference Example 7 includes an interface peelable sealant layer and a polyethylene layer (sealant layer). When the easily peelable sealant layer of Reference Example 7 is heat-welded to the blow tube and then peeled off, the "interface peelable sealant layer / polyethylene layer (sealant layer)" remains on the barrel of the tube container body, and the "paper / / PET" is peeled off.

[0130] The interface peelable sealant layer was a layer made of a mixed resin of LDPE and COC (LDPE:COC (mixing mass ratio) = 95:5), with Petrothene 226 (manufactured by Tosoh Corporation) used as the LDPE (low density polyethylene) and Apel 6013B (manufactured by Mitsui Chemicals, Inc.) used as the COC (cyclic olefin random copolymer obtained by addition polymerization).

[0131] The tube container body (blow tube) of Reference Example 7 was the same as that of Reference Example 6.

[0132] A tube container with a wound sheet of Reference Example 7 was produced in the same manner as the tube container with a wound sheet of Reference Example 6.

[0133] Comparative Evaluation of Reference Examples 6 and 7 As described above, the peelable sealant layer in Reference Example 6 is an intralayer cohesive failure type, and the peelable sealant layer in Reference Example 7 is an interfacial peel type. Below, Reference Examples 6 and 7 are used to compare the additive effects when the types of peeling are different.

[0134] More specifically, the wound sheet was peeled off via the peel trigger for each of the wound sheet-attached tube containers of Reference Examples 6 and 7. Next, the "visibility of contents" and "ease of squeezing" of each tube container were evaluated.

[0135] <Visibility of contents> The visibility of the contents in the body of the tube container after peeling off the rolled sheet was evaluated by calculating the haze value based on JIS K 7361-1997. The smaller the haze value, the higher the transparency, i.e., the higher the visibility of the contents in the body of the tube container. The evaluation criteria were as follows. The results are shown in Table 3. A: Haze value is 80% or more; B: Haze value is less than 70%.

[0136] Ease of squeezing The ease of squeezing the body of the tube container after peeling off the wrapping sheet was evaluated by manually squeezing the contents (grated ginger) filled in each tube container and comparing them according to the following criteria. The results are shown in Table 3. A: The contents were easily squeezed out with ease; B: The smoothness in the hand when squeezing was slightly inferior to "A", and there was a feeling of catching when squeezing out the contents.

[0137] [Table 3]

[0138] As is clear from Table 3, in terms of visibility of the contents, Reference Example 7, which uses an interfacial peeling type easy-peel resin, is superior to Reference Example 6, which uses an intralayer cohesive failure type easy-peel resin. In other words, it was found that an additional effect of being able to squeeze out the contents filled in the tube container while checking them was obtained.

[0139] Furthermore, from the viewpoint of ease of squeezing, Reference Example 6, which used an easy-to-peel resin of intralayer cohesive failure type, was superior to Reference Example 7, which used an easy-to-peel resin of interfacial peeling type, and it was found to have the additional effect of making it easier to squeeze out the contents filled in the tube container. [Explanation of symbols]

[0140] 1. Barrier layer 2a, 2b Easy-peel sealant layer 3 Surface layer 10 rolled sheets 20 Body of tube container body 30 Shoulder of tube container body 40. Spout portion of tube container body 50 tube container body 100 rolled sheets in a tube container

Claims

1. A tube container with a rolled sheet, comprising a tube container body and a rolled sheet, The rolled sheet has at least a barrier layer and is wound around the body of the tube container body. Tube container with rolled sheet.

2. 2. The tube container with the rolled 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-based coating or film, a polyvinylidene chloride-based coating or film, or a combination thereof.

3. The tube container with the rolled sheet according to claim 1 , wherein the rolled sheet further comprises an easily peelable sealant layer.

4. The rolled sheet further has a surface layer; and The barrier layer is bonded to the surface layer via the easily peelable sealant layer on the surface opposite to the tube container body. The tube container with the rolled sheet according to claim 3.

5. The tube container with the wound sheet according to claim 3 , wherein the barrier layer is bonded to the barrel of the tube container body via the easily peelable sealant layer.

6. The tube container with the rolled sheet according to any one of claims 3 to 5, wherein the rolled sheet has a peeling trigger.

7. The tube container with the rolled sheet according to any one of claims 3 to 5, wherein the rolled sheet is provided with a spiral perforation with the tube container as an axis.

8. The tube container with the rolled sheet according to any one of claims 3 to 5, wherein the rolled sheet has an indication that the rolled sheet is peelable.

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