Tube container with peelable sheet

Abstract

To provide a tube container with a peelable sheet which can achieve both a use feeling and peelability of a sheet.SOLUTION: A tube container (100) with a peelable sheet includes a tube container body (50) and a peelable sheet (10). The peelable sheet (10) includes a laminate in which a base material layer (1) and an easily peelable sealant layer (2) are laminated, and it is heat-sealed to a trunk part (20) of the tube container body in a winding-manner via the easily peelable sealant layer.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a tube container with a peelable sheet, and particularly to a tube container with a peelable sheet having a tube container body and a sheet wound around the container.

Background Art

[0002] Tube containers have been conventionally used as containers for various items such as pharmaceuticals, toothpaste, foods, cosmetics, adhesives, etc. A tube container is generally a tube body formed from a synthetic resin tube blow-molded or extruded into a cylindrical shape or a tube body formed by winding an aluminum laminate sheet into a cylindrical shape, which forms a cylindrical body portion, and at the upper end of the body portion, a head portion in which a mouth tube portion is erected from the upper end opening of a cap-shaped shoulder portion is heat-sealed and fixed, and after further filling the contents, the lower end opening of the body portion is often heat-sealed for use.

[0003] In addition, regarding a sheet-wound tube container in which a film is applied to the body portion thereof as a medium for information such as patterns and characters and / or a decoration for aesthetics among such tube containers, various developments have been made.

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

[0005] In addition, Patent Document 2 discloses a tube container in which a heat-sensitive label decorated with a printing layer is adhesively fixed in a wound shape by heat fusion to a predetermined height range on the outer peripheral surface of the body portion of a pre-formed tube main body.

[0006] Furthermore, Patent Document 3 discloses a decorated polyethylene tube container characterized in that a decorative film is wound around the body portion of a polyethylene tube container main body through an adhesive layer adjacent to the decorative layer, and the winding start portion and the winding end portion overlap.

Prior Art Documents

[0007] [Patent Document 1] Special Publication No. 2019-531928 [Patent Document 2] Japanese Patent Publication No. 2010-105692 [Patent Document 3] Japanese Patent Application Publication No. 07-040515 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The sheet-wrapped tube containers disclosed in the aforementioned Patent Documents 1 to 3 are all thought to be designed in such a way that the decorative sheet (film or label) does not peel off or fall off the tube container body.

[0009] However, in the following circumstances, it may be necessary to remove the sheet from the tube container: for example, when the sheet contains product campaign information or sweepstakes information and you wish to enter a contest; when you want to soften the tube container to empty its contents; or when you want to separate the sheet from the tube container for disposal or recycling.

[0010] Therefore, there is a need for a tube container with a peelable sheet that can be easily removed from the tube container body.

[0011] For example, shrink labels used on plastic bottles can be easily peeled off the bottle. However, when such shrink labels are applied to tube containers, the label tends to lift when the body of the tube container is squeezed, which creates a problem in terms of usability.

[0012] Therefore, there is a need to provide a tube container with a peelable sheet that offers a good user experience and allows for easy removal of the sheet. [Means for solving the problem]

[0013] The inventors, after diligent study, discovered that the above problems could be solved by the following means, and thus completed the present invention. That is, the present invention is as follows:

[0014] <Aspect 1> A tube container with a peelable sheet, comprising a tube container body and a peelable sheet, The peelable sheet comprises a laminate in which a base layer and an easily peelable sealant layer are laminated, and is heat-sealed in a winding manner to the body of the tube container via the easily peelable sealant layer. Tube container with peel-off sheet. <Aspect 2> The tube container with a peelable sheet according to Embodiment 1, wherein the easily peelable sealant layer has an easily peelable resin layer that breaks down cohesive layers within the layer. <Aspect 3> The tube container with a peelable sheet according to embodiment 1, wherein the easily peelable sealant layer has an interfacial peelable type easily peelable resin layer. <Aspect 4> A tube container with a peelable sheet according to any one of aspects 1 to 3, wherein the peelable sheet has a peeling trigger. <Aspect 5> The tube container with a peelable sheet according to embodiment 4, wherein at least a portion of the peeling trigger is present at the joint of the peelable sheet. <Pattern 6> A tube container with a peelable sheet according to any one of embodiments 1 to 5, wherein the peelable sheet is provided with spiral perforations with the tube container as its axis. <Aspect 7> The peelable sheet is a tube container with a peelable sheet according to any one of embodiments 1 to 6, wherein the peelable sheet has an indication that the peelable sheet is peelable. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a tube container with a peelable sheet that can achieve both a good feeling of use and the peelability of the sheet.

Brief Description of the Drawings

[0016] [Figure 1] FIG. 1 is a front view showing one aspect of the tube container with a peelable sheet of the present invention. [Figure 2] FIG. 2 is a schematic cross-sectional view of a barrel portion and a heat-sealed label according to one aspect of the tube container with a peelable sheet of the present invention. [Figure 3] FIG. 3 is an image diagram showing the aspect of the peeling trigger of each of the tube containers with a peelable sheet of Examples 1 to 6.

Modes for Carrying Out the Invention

[0017] 《Tube Container with a Peelable Sheet》 The tube container with a peelable sheet of the present invention is a tube container with a peelable sheet, having a tube container body and a peelable sheet, where the peelable sheet includes a laminate in which a base material layer and an easily peelable sealant layer are laminated, and is heat-sealed in a wound state to the barrel portion of the tube container body through the easily peelable sealant layer. Tube container with a peelable sheet is.

[0018] The tube container with a peelable sheet of the present invention (hereinafter, also simply referred to as "the tube container of the present invention") can have the following advantages (1) to (9) due to the effects of the present invention described above:

[0019] (1) Improvement in the separate disposal property of the tube container Hitherto, those in which the sheet and the tube container body could not be separated were treated as combustibles, but the tube container of the present invention can separately dispose of the peelable sheet and the tube container body. Further, by this separate disposal, the amount of combustible waste can also be reduced.

[0020] (2) Thinning of the tube container body and reduction of resin usage For example, by wrapping a highly rigid, peelable sheet around the body of the tube container, the tube container can be made self-supporting even if the tube container body is made thinner.

[0021] Furthermore, by making the tube container body thinner, the amount of resin used to form the tube container body can be reduced.

[0022] (3) Easy disposal By making the tube body thinner, the tube container can be disposed of in a more compact manner.

[0023] (4) Contributes to complete use By peeling off the removable sheet, the contents become easier to squeeze out of the relatively softened tube container (making it possible to create a thin, easy-to-squeeze-out state at the end).

[0024] (5) Strengthening barrier properties By using a high-barrier material on the peelable sheet side, the overall barrier properties of the tube container can be improved. Examples of barrier materials that can be used include aluminum foil or vapor-deposited PET film.

[0025] (6) Provision of supplementary information such as advertisements and product descriptions By making the overlapping portion of the peelable sheet longer (larger), additional information such as advertisements or product descriptions can be provided in this portion.

[0026] (7) The sheet contains information about product campaigns and "lotteries," etc. By including product campaign information or lottery details on a peelable sheet, it becomes easier for users to peel off the sheet and participate in the contest.

[0027] (8) Use of various decorative layers For example, the base layer of the peelable sheet can be made to include decorative layers that were difficult to achieve with conventional laminate tubes, such as embossed PET film or holographic PET film.

[0028] Additionally, paper can be used on the surface of the peelable sheet. By peeling it off, the peelable sheet can be separated and disposed of as paper waste.

[0029] Furthermore, by making the base tube container as thin as possible, it is possible to create paper tubes that can be handled as paper without needing to be separated.

[0030] (9) Improved production efficiency / Small lot production Conventional blow tubes require a plate change each time the design needs to be changed, for example, when printing directly onto the tube. In contrast, by using peelable sheets, the design can be changed simply by switching the printed sheets.

[0031] Furthermore, regarding printing, since it does not form side seams with a laminated structure like conventional laminate tubes, it is possible to use printing methods that would be functionally insufficient (in this case, insufficient laminate strength or ink adhesion) when considering conventional side seams, such as digital printing.

[0032] Therefore, digital printing not only enables handling small-lot, high-mix production and short delivery times, but also leads to a reduction in printed defects.

[0033] Figure 1 is a front view showing one embodiment of the tube container with a peelable sheet according to the present invention. As shown in Figure 1, the tube container 100 with a peelable sheet according to the present invention has a tube container body 50 and a peelable sheet 10. The details of the peelable sheet 10 will be explained below using a schematic cross-sectional view of the body and heat-sealed peelable sheet according to one embodiment of the tube container with a peelable sheet according to the present invention shown in Figure 2.

[0034] As shown in Figure 2, the peelable sheet 10 includes a laminate in which a base layer 1 and an easily peelable sealant layer 2 are laminated, and is heat-sealed in a winding manner to the body 20 of the tube container via the easily peelable sealant layer 2.

[0035] As described above, in the tube container 100 with a peelable sheet of the present invention, since the peelable sheet 10 is heat-sealed to the body 20 of the tube container 50 in a winding manner, the peelable sheet 10 does not float up even when the body 20 is squeezed, meaning that it is easy to use. Furthermore, when peeling off the peelable sheet 10, the peelable sheet 10 can be easily peeled off the tube container by cohesive breakdown of the easily peelable sealant layer 2.

[0036] The following describes each component of the tube container with a peelable sheet according to the present invention.

[0037] <Removable sheet> In the present invention, the peelable sheet has a decorative function for information such as patterns and characters and / or for aesthetic purposes. The thickness of the peelable sheet is not particularly limited and may be set as appropriate according to durability, flexibility, tactile feel, or application.

[0038] (Structure of the peelable sheet) The peelable sheet according to the present invention includes a laminate in which a base layer and an easily peelable sealant layer are laminated.

[0039] 1.Base material layer In the present invention, the material constituting the base layer is not particularly limited, but may be selected from materials that have sufficient flexibility to follow the squeeze deformation of the tube container without any discomfort. Alternatively, the material constituting the base layer may be selected from materials that can withstand the heat when the easily peelable sealant layer of the peelable sheet, described later, is heat-sealed to the body of the tube container.

[0040] More specifically, the materials constituting the base layer include, but are not limited to, films made of biaxially oriented polypropylene or biaxially oriented polyethylene terephthalate. Furthermore, oxides such as silicon or aluminum may be deposited on the surface of the film constituting the base layer.

[0041] Furthermore, in the present invention, the base material layer may be a single layer, a plurality of layers, or a laminate in which multiple layers of the same or different types are stacked. Here, among the laminate constituting the base material layer, for example, a functional layer may be provided, and printing, foil stamping, embossing, etc., may be provided on the surface of the base material layer or within the laminate constituting the base material layer.

[0042] In the present invention, the thickness of the base material layer is not particularly limited. For example, from the viewpoint of providing durability to the sheet, it may be 1 μm or more, 5 μm or more, 10 μm or more, or 20 μm or more. From the viewpoint of providing flexibility to the sheet, it may be 100 μm or less, 50 μm or less, 40 μm or less, or 30 μm or less.

[0043] 2. Easily peelable sealant layer In the present invention, the easily peelable sealant layer refers to a layer that allows the peelable sheet to be easily peeled off by human hands from a state in which the peelable sheet is heat-sealed to the body of the tube container.

[0044] In the present invention, the easily peelable sealant layer may be a laminate having an easily peelable resin layer, or it may consist only of an easily peelable resin layer. Therefore, for example, the easily peelable sealant layer may have an easily peelable resin layer of the type that causes intralayer cohesive failure, or it may have an easily peelable resin layer of the type that causes interfacial peeling. Furthermore, the easily peelable sealant layer may consist only of an easily peelable resin layer of the type that causes intralayer cohesive failure, or it may consist only of an easily peelable resin layer of the type that causes interfacial peeling.

[0045] If the easily peelable sealant layer is a single layer, it may be an intralayer cohesive failure type layer or an interfacial peel type layer, but it is preferable that it is an intralayer cohesive failure type layer. Furthermore, if the easily peelable sealant layer includes multiple layers (for example, 2 to 10 layers, preferably 2 to 4 layers, more preferably 2 layers), at least one of them may be an intralayer cohesive failure type layer or an interfacial peel type layer, but it is preferable that it is an interfacial peel type layer. Moreover, if the easily peelable sealant layer includes multiple layers, it is preferable that the layer that directly contacts the tube container body is a layer made of a material that can be heat-sealed to the tube container body (a so-called "sealant layer"), and is preferably made of a material appropriately selected from the polyolefin resins described later.Therefore, one preferred embodiment of the easily peelable sealant layer when it includes multiple layers is an easily peelable sealant layer in which, when viewed from the substrate layer side, the layers are laminated in the order of "interfacial peel type easily peelable resin layer / sealant layer".

[0046] Herein, in the present invention, "internal cohesive failure type easily peelable resin layer" refers to a resin layer that, when a peelable sheet is peeled from the body of the tube container, breaks inside the easily peelable resin layer, and is divided in such a way that a portion of the easily peelable resin layer remains on both the body of the tube container and the base layer.

[0047] In the present invention, when the easily peelable resin layer is an easily peelable resin layer of the type that breaks cohesive layers within the layer, the body of the tube container after the peelable sheet has been removed has better slipperiness to the human finger compared to when the easily peelable resin layer is an easily peelable resin layer of the type that breaks at the interface, thereby making it easier to squeeze out the contents remaining inside the tube container by squeezing the tube container after the peelable sheet has been removed. Here, when the easily peelable resin layer is an easily peelable resin layer of the type that breaks cohesive layers within the layer, the reason why the body of the tube container after the peelable sheet has been removed has better slipperiness to the human finger is thought to be because the easily peelable resin layer remaining on the surface of the tube container reduces friction and snagging when squeezing the tube container with the fingers.

[0048] Furthermore, in the present invention, the term "interfacially peelable resin layer" refers to a layer that peels off at the interface between the easily peelable resin layer and an adjacent layer, or at the interface between the easily peelable resin layer and the tube container body, when peeling the peelable sheet from the body of the tube container. More specifically, in the present invention, the term "interfacially peelable resin layer" refers to, for example, either of the following resin layers: (i) or (ii): (i) When the easily peelable resin layer and the substrate layer are in direct contact, the resin layer peels off at the interface between the easily peelable resin layer and the substrate layer, leaving the easily peelable resin layer on the body of the tube container, while removing the peelable sheet portion excluding the easily peelable resin layer from the tube container body, or (ii) When there is another layer between the easily peelable resin layer and the substrate layer, the resin layer peels off at the interface between the easily peelable resin layer and the other layer, leaving the easily peelable resin layer on the body of the tube container body, while removing the peelable sheet portion excluding the easily peelable resin layer from the tube container body.

[0049] In the present invention, if the easily peelable sealant layer is an interfacial peelable resin layer, the transparency of the body of the tube container after peeling can be maintained, and therefore it is preferable to use it in combination with a transparent blow-molded tube container. In particular, even if the easily peelable resin layer remains on the tube as in (i) and (ii) above, the transparency of the body of the tube container after peeling can be maintained because the surface of the easily peelable resin layer is smooth.

[0050] Furthermore, in the present invention, the peel strength when peeling the peelable 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 1.0 N / 15 mm or more. Note that "peel strength" refers to the peel strength when peeled 180° according to the method specified in, for example, JIS-Z-0238.

[0051] In the present invention, the material constituting the easily peelable sealant layer is not particularly limited, but may be appropriately determined based on types such as "intralayer cohesive failure type easily peelable resin layer" or "interfacial peelable type easily peelable resin layer".

[0052] More specifically, the material constituting the easily peelable resin layer with intralayer cohesive failure may be selected from, for example, polyolefin resins.

[0053] More specifically, polyolefin resins include, but are not limited to, ethylene-based resins such as low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer resin (EVA), and ethylene-α-olefin copolymer; polypropylene-based resins such as homopolypropylene resin, propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer; and polybutene. These can also be used individually or as blended materials with these as the main raw materials. It is preferable to use a material from these materials that can be heat-sealed to the tube container body.

[0054] Furthermore, the material constituting the interfacial peelable resin layer may be selected from a mixture of polyolefin resin and cyclic olefin copolymer in any ratio. The ratio of cyclic olefin copolymer to the total of polyolefin resin and 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.

[0055] 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. Preferably, the cyclic olefin copolymer is a copolymer in which at least one cyclic olefin and at least one vinyl compound other than a cyclic olefin are used as monomers. The cyclic olefin copolymer may be a cyclic olefin-based random copolymer (COC) obtained by addition polymerization using at least one cyclic olefin and at least one vinyl compound other than a cyclic olefin as monomers, or it may be 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 the fused ring skeleton and at least one unsaturated compound other than said compound as monomers.

[0056] When a cyclic olefin copolymer is a cyclic olefin random copolymer (COC) obtained by addition polymerization, the cyclic olefin used as the monomer is not particularly limited, but examples 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, as well as polycyclic cycloolefins such as tetracyclododecene and norbornene, and their derivatives.

[0057] Furthermore, vinyl compounds other than cyclic olefins that can serve as comonomers for cyclic olefin random copolymers (COCs) are not particularly limited, but examples 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 with two unsaturated bonds; and linear or branched dienes such as butadiene and isoprene.

[0058] When a cyclic olefin-based random copolymer (COC) is used as the material constituting the interfacial peelable resin layer, the proportion of structural units derived from the cyclic olefin is preferably 15 to 60 mol%, and more preferably in the range of 25 to 50 mol%.

[0059] Furthermore, when the cyclic olefin copolymer is a cyclic olefin ring-opening polymer obtained by ring-opening polymerization or a hydrogenated product thereof (COP), the compound having a double bond in the fused ring skeleton that becomes the monomer is not particularly limited as long as it can be polymerized by a metasense polymerization catalyst. Examples include compounds having a norbornene-based skeleton such as tetracyclododecene, norbornene, or derivatives thereof.

[0060] Furthermore, the unsaturated compounds other than those having a double bond in the fused ring skeleton that serve as comonomers for cyclic olefin ring-opening polymers are not particularly limited as long as they can be polymerized by a metasense polymerization catalyst. Examples include cyclic olefins that serve as monomers for the above-mentioned cyclic olefin-based random copolymers (COCs), cyclic dienes, monomers having a carbon-carbon double bond in the main chain, and derivatives thereof.

[0061] Furthermore, cyclic olefin ring-opening polymers have a carbon-carbon double bond (C=C) in their main chain. When hydrogenation is performed, a hydrogenated product (COP) can be obtained in which the double bond in the main chain is replaced by a carbon-carbon single bond (CC). From the viewpoint of heat resistance, weather resistance, etc., a polymer in which at least the carbon-carbon double bond in the main chain is hydrogenated may also be used.

[0062] When using a cyclic olefin ring-opening polymer or its hydrogenated product (COP), it is preferable that the proportion of structural units derived from a compound having a double bond in the fused ring skeleton is 80% by mass or more, considering that it will be subjected to a hydrogenation reaction.

[0063] In the present invention, the thickness of the easily peelable sealant layer or the easily peelable resin layer is not particularly limited. For example, from the viewpoint of providing durability to the sheet, it may be 1 μm or more, 5 μm or more, 10 μm or more, or 20 μm or more. From the viewpoint of providing flexibility to the sheet, it may be 100 μm or less, 50 μm or less, 40 μm or less, or 30 μm or less.

[0064] 3. Other layers In the peelable sheet according to the present invention, other layers may be further included between the base layer and the easily peelable sealant layer, and on the side of the base layer opposite to the easily peelable sealant layer, for the purpose of providing further functionality.

[0065] Other layers include, but are not limited to, a printing layer, a barrier layer, an absorbent layer, and an adhesive layer.

[0066] 4. Method for forming laminated bodies In the peelable sheet according to the present invention, the method for forming the laminate in which the base layer and the easily peelable sealant layer are laminated is not particularly limited, and for example, a dry lamination method, a sand lamination method, or a co-extrusion film molding method may be used. In addition, commercially available sheet molded products may be used as each layer or as the laminate.

[0067] (Features of peelable sheets) In the present invention, from the viewpoint of improving the ease of peeling off the peelable sheet, the peelable sheet may have a peeling trigger, or it may have spiral perforations with the tube container as the axis, or it may have both.

[0068] The peelable sheet can be more easily peeled off the tube container by having a peeling trigger. In particular, it is preferable that the peelable sheet has a peeling trigger when the tube container contains a material with a metallic surface.

[0069] In the present invention, the peeling trigger is not particularly limited and may be, for example, the following: (i) When heat-sealing a peelable sheet to the body of a tube container, a region in the easily peelable sealant layer of the peelable sheet that is not heat-sealed or a region that is heat-sealed less strongly than other regions can be used as the peeling trigger; (ii) A welding-inhibiting layer such as a peeling varnish can be provided on the side of the easily peelable sealant layer of the peelable sheet that is heat-sealed to the body of the tube container, and this can also be used as the peeling trigger.

[0070] Furthermore, from the viewpoint of improving the ease of peeling the peelable sheet, it is preferable that at least a portion of the peeling trigger is located at the joint of the peelable sheet. Here, the joint of the peelable sheet refers to the joint at both ends of the sheet in the winding direction when the peelable sheet is heat-sealed to the body of the tube container in a winding manner, and these two ends of the peelable sheet may be (i) spaced apart, (ii) tightly connected, or (iii) overlapped. For example, if the easily peelable sealant layer has an easily peelable resin layer that undergoes cohesive failure within the layer when it is peeled off, the joint may be of any of the above types (i) to (iii). Also, if the easily peelable sealant layer has an easily peelable resin layer that undergoes interfacial peeling when it is peeled off, it is preferable that the joint is of type (i) or (ii).

[0071] In the present invention, the peelable sheet may have an indication that it is peelable. More specifically, the peelable sheet may have an indication that it is peelable, a method of peeling, that it can be peeled and disposed of separately, or that it can be peeled and a specific part can be used for applications, etc. Such indications can provide convenience to users, etc.

[0072] Furthermore, in the present invention, the state in which the peelable sheet is heat-sealed to the body of the tube container in a winding manner refers to a state in which the peelable sheet is heat-sealed in a winding manner, regardless of the method by which the peelable sheet is wrapped around the body of the tube container. Therefore, the heat-sealed portion may be fully welded or welded in a striped pattern.

[0073] <Tube container body> In the present invention, the tube container is used as a container for filling with contents such as pharmaceuticals, toothpaste, food, cosmetics, or adhesives.

[0074] Therefore, the tube container body has a body portion and a spout portion. Depending on the design and practicality, for example, it may also have a shoulder portion between the body portion and the spout portion. For example, as shown in Figure 1, the tube container body 50 has a body portion 20, a shoulder portion 30, and a spout portion 40.

[0075] In the present invention, the tube container body may be a laminated tube, or it may be an extruded tube or a multilayer blow-molded tube. Furthermore, the laminate or single layer for forming the tube container body may include a layer made of resin material and a layer made of metal material. If there are multiple layers for forming the tube container body, each layer may contain the same material or different materials.

[0076] Method for manufacturing a tube container with a peelable sheet The method for manufacturing the tube container with a peelable sheet of the present invention is not particularly limited, and can be carried out, for example, as follows.

[0077] In other words, the tube container body and the laminate for the peelable sheet are prepared according to the purpose and application. Then, using a rotary heat roll, the easily peelable sealant layer of the laminate for the peelable sheet is aligned with the body of the tube container body and heat-pressed, thereby heat-sealing the peelable sheet to the body of the tube container body in a wrapped manner.

[0078] The temperature during heat bonding is not particularly limited and may be, for example, 100 to 300°C. Similarly, the force applied during heat bonding is not particularly limited and may be, for example, 5 to 20 kgf. [Examples]

[0079] The present invention will be described below using examples and comparative examples, but the present invention is not limited to these.

[0080] Examples 1-6 As laminates for peelable sheets in Examples 1 to 6, laminates having the following layer configurations were prepared (where " / / " indicates bonding by dry laminating adhesive): PETsiox (12 μm) / / inkPET (12 μm) / AC agent / EMAA (20 μm) / Easy-peel sealant layer (intralayer cohesive breakdown type easy-peel resin layer) (20 μm)

[0081] The easily peelable sealant layers in Examples 1 to 6, i.e., the easily peelable resin layers that undergo cohesive failure within the layer when the peelable sheet is peeled off, are polyethylene easy-peel sealants (7601EB manufactured by Toray Film Processing Co., Ltd.).

[0082] The layer structure of the tube container body (laminated tube) in Examples 1 to 5 is as follows: (Front side) LLDPE(50μm) / LDPEf(100μm) / PET(12μm) / EMAA(30μm) / Al(9μm) / EMAA(30μm) / LLDPE(100μm)(Contents side)

[0083] The layer structure of the tube container body (blow tube) in Example 6 is as follows: (Front side) LDPE (100 μm) / Acid-modified resin (10 μm) / EVOH (20 μm) / Acid-modified resin (10 μm) / LDPE (100 μm) (Contents side)

[0084] The details of the abbreviations for each layer structure described above are as follows: PETsiox: PET layer with deposited silicon oxide 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-methacrylate copolymer Al: Aluminum foil layer LDPE: Low-density polyethylene resin layer EVOH: Ethylene-vinyl alcohol copolymer layer

[0085] <Manufacturing method> In Examples 1 to 6, a laminate for a peelable sheet, approximately the same size as the body of the tube container described above, was used to heat-press the tube container onto a rotary heat roll (200°C) with a force of 10 kgf via an easily peelable sealant layer, thereby producing the peelable sheet-attached tube containers of Examples 1 to 6.

[0086] In Examples 1-4 and 6, peelable sheets were provided with peel triggers (unwelded areas). The locations of each peel trigger are shown in Figures 3(a) to 3(d). The configuration of Example 5 is shown in Figure 3(e).

[0087] Comparative Example 1 A PET shrink label was wrapped around the same blow-molded tube as the tube container in Example 6 to produce the tube container with a peelable sheet of Comparative Example 1.

[0088] "evaluation" <Evaluation of sheet peelability> For each example and comparative example, a peelable sheet-attached tube container was filled with sunscreen as its contents, and the bottom end was sealed with an ultrasonic seal. After the contents were dispensed, the sheet was peeled off, and the peelability of the sheet was evaluated based on the following criteria. Evaluation criteria for peelability A: It could be easily peeled off by hand. B: It peeled off with just a little rubbing of my finger. C: Could not be removed.

[0089] <Evaluation of user experience> In terms of usability, the squeeze-following ability of the peelable sheet-equipped tube containers of each example and comparative example was evaluated as follows. The amount of contents that can be filled varies depending on the diameter of the tube container, and the number of squeezes required during actual use also changes. Therefore, the number of squeezes was set according to the difference in diameter as follows, and a squeeze test was conducted using a method where one squeeze was counted when opposing surfaces of the body touched, and the presence or absence of lifting or peeling of the wrapped film was checked. • Tube container with a φ35 (35mm diameter) laminated tube and a peel-off sheet: 130 uses; • Tube container with a peelable sheet attached to a φ23 (tube diameter 23mm): 40 uses.

[0090] The evaluation criteria are as follows: A: If no lifting or peeling occurs, the conformability is judged to be good; B: If lifting or peeling occurs, it will be judged as poor conformability.

[0091] The configuration and evaluation results of the peelable sheet-equipped tube containers for each example and comparative example are shown in Table 1.

[0092] [Table 1]

[0093] As is clear from Table 1, all of the tube containers with peelable sheets in Examples 1 to 6 allowed for the peelable sheet to be removed, and also demonstrated good usability (squeeze-following ability). In particular, in Examples 1 to 4 and 6, it was found that the peelable sheet could be easily removed by using a peelable sheet that had a peeling trigger.

[0094] Example 7 As the laminate for the peelable sheet in Example 7, a laminate having the following layer configuration was prepared (where " / / " indicates bonding with a dry laminating adhesive): Paper (80g / m 2 ) / / PET (12μm) / Interfacial peel-type easily removable resin layer (20μm) / PE layer (sealant layer) (30μm)

[0095] The easily peelable sealant layer of Example 7 includes an interfacially peelable easily peelable resin layer and a polyethylene layer (sealant layer). When this easily peelable sealant layer of Example 7 is heat-welded to the blow tube and then peeled off, the "interfacially peelable easily peelable resin layer / polyethylene layer (sealant layer)" remains on the body of the tube container, while the "paper / PET" is peeled off.

[0096] Furthermore, the interfacial peelable resin layer is a layer made of a mixed resin of LDPE and COC (LDPE:COC (mixing mass ratio) = 95:5), with petrocene 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 produced by addition polymerization).

[0097] The same tube container body (blow tube) used in Example 7 was the same as that used in Example 6.

[0098] A tube container with a peelable sheet according to Example 7 was prepared in the same manner as the tube container with a peelable sheet according to Example 6.

[0099] Comparative evaluation of Examples 6 and 7 As described above, in Example 6, the easily peelable sealant layer is an easily peelable resin layer of the type that breaks down cohesive layers within the layer, and in Example 7, the easily peelable sealant layer is an easily peelable resin layer of the type that peels at the interface. Below, we compare the additional effects when the peeling type is different using Examples 6 and 7.

[0100] More specifically, the peelable sheets were removed from each of the tube containers with peelable sheets in Examples 6 and 7 via a peeling trigger. Next, the "visibility of contents" and "ease of squeezing" of each tube container were evaluated.

[0101] <Visibility of contents> The visibility of the contents of the tube container body after peeling off the peelable sheet was evaluated by calculating the haze value based on JIS K 7361-1997. A smaller haze value indicates higher transparency, i.e., higher visibility of the contents of the tube container body. The evaluation criteria were as follows. The results are shown in Table 2. A: Haze value is 80% or higher; B: Haze value is less than 70%.

[0102] <Ease of squeezing out> The ease of squeezing the contents (grated ginger) from the body of each tube container after removing the peelable sheet was compared by manually squeezing the contents from each tube container according to the following criteria. The results are shown in Table 2. A: The material was smooth to the touch when squeezing, allowing the contents to be squeezed out easily. B: The grip on the hand when squeezing was slightly inferior to "A," and there was a feeling of resistance when squeezing out the contents.

[0103] [Table 2]

[0104] As is clear from Table 2, in terms of visibility of the contents, Example 7, which uses an interfacial peel-type easily peelable resin, is superior to Example 6, which uses an intralayer cohesive-breaking type easily peelable resin. In other words, it was found that an additional effect is obtained in which the contents filled in the tube container can be squeezed out while being confirmed.

[0105] Furthermore, from the standpoint of ease of squeezing, Example 6, which uses an easily peelable resin with intralayer cohesive breakdown, was found to be superior to Example 7, which uses an easily peelable resin with interfacial peeling, and it was found that an additional effect was obtained in that the contents filled in the tube container were easier to squeeze out. [Explanation of symbols]

[0106] 1 Base material layer 2. Easy-peel sealant layer 10 Peelable Sheets 20 Body of the tube container 30 Shoulder portion of the tube container body 40. Dispensing spout of the tube container body 50 Tube container body 100 Tube Containers with Peelable Sheets

Claims

1. A tube container with a peelable sheet, comprising a tube container body and a peelable sheet, The peelable sheet comprises a laminate in which a base layer and an easily peelable sealant layer are laminated, and is welded and wrapped around the entire circumference of the body of the tube container via the easily peelable sealant layer, The peel strength when peeling the peelable sheet from the body of the tube container is 1.0 N / 15 mm or more and 12 N / 15 mm or less. Tube container with peel-off sheet.

2. The tube container with a peelable sheet according to claim 1, wherein the portion to which the peelable sheet is welded to the body of the tube container is either fully welded or in a striped pattern.

3. The tube container with a peelable sheet according to claim 1 or 2, wherein the easily peelable sealant layer has a layer of the type that causes cohesive failure within the layer.

4. The tube container with a peelable sheet according to claim 1 or 2, wherein the easily peelable sealant layer has an interfacial peelable layer.

5. The tube container with a peelable sheet according to any one of claims 1 to 4, wherein the peelable sheet has a peeling trigger.

6. The tube container with a peelable sheet according to claim 5, wherein at least a portion of the peeling trigger is present at the joint of the peelable sheet.

7. The tube container with a peelable sheet according to any one of claims 1 to 6, wherein the peelable sheet is provided with spiral perforations with the tube container as its axis.

8. The peelable sheet has an indication that the peelable sheet is peelable, as described in any one of claims 1 to 7.

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