Laminate for laminate tube container

Abstract

To provide a novel laminated tube container laminate that has uneven shapes with heights and intervals that can be recognized by human touch, and does not damage or is less likely to damage barrier properties even when wound into a roll under winding tension.SOLUTION: As shown in Fig. 1(a), the laminate 100 for a laminated tube container of the present invention has an overcoat layer, a print layer 110, an outer sealant layer 120, an intermediate layer 130, a barrier layer 140, and an inner sealant layer 150 in this order. The inner sealant layer 150 has a thickness at least five times the thickness of the uneven shape formed by the print layer 110, and at least a part of the uneven shape has a thickness of 7.0 μm or more and a spacing of 2.3 mm or more.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a laminate for a laminate tube container. [Background technology]

[0002] Conventionally, laminated tube containers have been manufactured by various methods. For example, a laminated sheet is manufactured, and the outermost and innermost layers at both ends of the sheet are heat-sealed to form a cylindrical body. A head portion, consisting of a mouth portion, a shoulder portion, and the like, is then formed at one opening of the cylindrical body, and a cap is screwed onto the mouth portion to produce a laminated tube container. The heat-sealed portion between the outermost and innermost layers is sometimes referred to as a side seam. The laminated tube container manufactured in this manner can be filled with a semi-fluid content, such as toothpaste, through the open end of the cylindrical body, and the open end is hermetically sealed to form a bottom seal, thereby forming a tubular packaged product.

[0003] Various structures of laminated tube container laminates are known, and Patent Document 1 discloses a packaging material for tube containers in which a finely textured pattern is formed on the printed surface. Patent Document 1 states that such a laminated tube container laminate provides a matte finish due to the finely textured pattern, thereby enhancing the design. The finely textured pattern is formed from a partially formed first surface layer and a second surface layer. The first surface layer is partially formed on the outer surface of the outer sealant layer, and the second surface layer is formed thicker than the first surface layer in areas where the first surface layer is not formed, and contains an ultraviolet-curable resin. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-154682 Summary of the Invention [Problem to be solved by the invention]

[0005] There is a demand for further improvement in the distinguishability of laminated tube containers. For example, it is conceivable to form an uneven shape on a part of the surface of the body of a laminated tube container, which is so uneven that a person can distinguish it by touch.

[0006] However, the present inventors have discovered that in a laminated tube container laminate having a barrier function, if an uneven shape with a thickness and spacing that is easily identifiable by touch is formed, and then the laminated tube container laminate is wound into a roll by applying winding tension, the barrier function of the laminated tube container laminate may be reduced.

[0007] Therefore, the present invention provides a novel laminate for a laminated tube container, which has an uneven shape with a height and spacing that can be distinguished by touch, and whose barrier properties are not or are unlikely to be impaired even when wound into a roll under winding tension. [Means for solving the problem]

[0008] 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: <Aspect 1> an overcoat layer, a printing layer, an outer sealant layer, an intermediate layer, a barrier layer, and an inner sealant layer, in this order; the inner sealant layer has a thickness at least five times the thickness of the uneven shape formed by the printing layer, At least a part of the uneven shape has a thickness of 7.0 μm or more and an interval of 2.3 mm or more. Laminated body for laminated tube containers. <Aspect 2> The laminate for a laminated tube container according to aspect 1, wherein the overcoat layer and the printed layer are made of an ultraviolet-curable resin. <Aspect 3> 3. The laminate for a laminate tube container according to aspect 1 or 2, wherein the overcoat layer has a tensile modulus of elasticity of 400 MPa or more. <Aspect 4> 4. The laminate for laminated tube containers according to any one of Aspects 1 to 3, wherein the inner sealant layer has a tensile modulus of elasticity of 300 MPa or less. <Aspect 5> the overcoat layer is a colorless and transparent layer, and The printed layer is a colorless and transparent layer, a colored layer, or a laminate having a colored layer and a colorless and transparent layer in this order from the outer sealant layer side. 5. The laminate for laminate tube containers according to any one of aspects 1 to 4. <Aspect 6> 6. The laminate for laminated tube containers according to any one of Aspects 1 to 5, wherein the printed layer forms a picture, a design, a symbol, or text information. <Aspect 7> 7. The laminate for laminated tube containers according to any one of Aspects 1 to 6, wherein the barrier layer comprises a metal-deposited film, a metal compound-deposited film, a silica-deposited film, a metal foil, or a combination thereof. <Aspect 8> A laminated tube container, in which the outer sealant layer and the inner sealant layer of the laminate for laminated tube containers according to any one of aspects 1 to 7 are sealed to form a cylindrical container. <Aspect 9> A method for producing a laminate for a laminated tube container, which has an overcoat layer, a print layer, an outer sealant layer, an intermediate layer, a barrier layer, and an inner sealant layer in this order, comprising: forming the overcoat layer and the printing layer on the outer surface side of the outer sealant layer; and Winding up the laminate for a laminate tube container. Including, At least a portion of the uneven shape formed by the printing layer has a thickness of 7.0 μm or more and an interval of 2.3 mm or more; and The inner sealant layer has a thickness that is 5 times or more the thickness of the uneven shape. A method for manufacturing a laminate for a laminate tube container. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a novel laminate for a laminated tube container, which has an uneven shape with a height and spacing that can be distinguished by touch by humans, and whose barrier properties are not impaired or are unlikely to be impaired even when wound into a roll under winding tension. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a side cross-sectional view of one embodiment of the laminate for a laminate tube container of the present invention. [Figure 2] FIG. 2 is a schematic diagram showing a state in which the laminate for a laminated tube container of the present invention is wound into a roll and laminates are stacked on top of each other. DETAILED DESCRIPTION OF THE INVENTION

[0011] <<Laminated body for laminated tube containers>> The laminate for a laminate tube container of the present invention is an overcoat layer, a printing layer, an outer sealant layer, an intermediate layer, a barrier layer, and an inner sealant layer, in this order; the inner sealant layer has a thickness at least five times the thickness of the uneven shape formed by the printing layer, At least a portion of the uneven shape has a thickness of 7.0 μm or more and an interval of 2.3 mm or more.

[0012] The present inventors considered forming a printed layer on the outer surface of the outer sealant layer to form a textured shape that can be discerned by human touch, and found that in order for a person to fully recognize the textured shape by touch, it is preferable for the textured shape to have a height of 7.0 μm or more and a spacing of 2.3 mm or more.

[0013] However, the present inventors have found that when unevenness having the above height and spacing is provided in a laminate for laminated tube containers having a barrier function, particularly in a laminate for laminated tube containers having a barrier layer, and the laminated tube containers are wound into a roll as shown in Figure 2, the barrier function of the laminate for laminated tube containers may be reduced.

[0014] In contrast to this, the present inventors have discovered that when the inner sealant layer of the laminate for laminated tube containers has a specific thickness, specifically when the thickness of the inner sealant layer is at least five times the thickness of the uneven shape, the problem of the barrier function of the laminate for laminated tube containers being reduced can be suppressed.

[0015] According to the present invention, it is possible to print a concave-convex shape in a process before the laminate for a laminated tube container is wound into a roll, i.e., in the same process as flat printing, thereby achieving cost reduction while providing a laminated tube with high design quality.

[0016] Specifically, for example, as shown in FIG. 1(a), the laminated tube container laminate 100 of the present invention comprises: It is composed of a laminate having, in this order, a printed layer 110, an outer sealant layer 120, an intermediate layer 130, a barrier layer 140, and an inner sealant layer 150. In addition, an overcoat layer (not shown) is formed on the outer surface of the printed layer 110 and on the outer surface of the outer sealant layer on which no printed layer is formed.

[0017] Each component of the present invention will be described below.

[0018] The laminate for a laminate tube container of the present invention has an overcoat layer, a print layer, an outer sealant layer, a barrier layer, and an inner sealant layer in this order.

[0019] <Overcoat layer> The laminate for a laminated tube container of the present invention has an overcoat layer (protective layer) formed for the purpose of protecting the outer surfaces of the printed layer and the outer sealant layer.

[0020] The overcoat layer may be composed of an ultraviolet-curable resin, and the overcoat layer may be composed of 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, or 98% by mass or more of the ultraviolet-curable resin.

[0021] The ultraviolet curable resin may be, for example, polyurethane acrylate, epoxy acrylate, acrylic resin acrylate, or polyester acrylate.

[0022] As the polyurethane acrylate, for example, aromatic polyurethane acrylate or aliphatic polyurethane acrylate can be used.

[0023] In the present invention, the term "aromatic polyurethane acrylate" refers to a polyurethane acrylate having a benzene ring, and the term "aliphatic polyurethane acrylate" refers to a polyurethane acrylate not having a benzene ring.

[0024] The overcoat layer preferably has a tensile modulus of 400 MPa or more, 450 MPa or more, 500 MPa or more, 550 MPa or more, 600 MPa or more, 650 MPa or more, or 700 MPa or more in order to protect the outer surfaces of the printed layer and outer sealant layer described below. Furthermore, the overcoat layer has a tensile modulus of 1000 MPa or less, 900 MPa or less, or 800 MPa or less in order to protect the printed layer from scratches.

[0025] The "tensile modulus of elasticity of the overcoat layer" can be measured by subjecting the coating film to a tensile test in accordance with JIS-K-7127.

[0026] The overcoat layer may be a colorless, transparent layer.

[0027] The overcoat layer may not contain a pigment. By not containing a pigment and being colorless and transparent, the color of the print layer, intermediate layer, or barrier layer can be easily seen.

[0028] The overcoat layer can be formed on the entire outer surface of the printed layer and the outer sealant layer on which the printed layer is not formed, or can be formed on a portion of the outer surface of the printed layer and the outer sealant layer on which the printed layer is not formed.

[0029] The thickness of the overcoat layer may be 5000 nm or less, 4000 nm or less, 3000 nm or less, 2000 nm or less, or 1000 nm or less, and may be 500 nm or more, 600 nm or more, 700 nm or more, or 800 nm or more.

[0030] <Printing layer> At least a portion of the concave and convex shapes formed on the printing layer have a thickness of 7.0 μm or more and intervals of 2.3 mm or more.

[0031] The thickness of at least a portion of the formed concave-convex shape may be 7.2 μm or more, 7.4 μm or more, 8.0 μm or more, 10.0 μm or more, or 12.0 μm or more, and may be 20.0 μm or less, 18.0 μm or less, 16.0 μm or less, or 14.0 μm or less. The spacing of at least a portion of the formed concave-convex shape may be 2.4 mm or more, or 2.5 mm or more, and may be 10.0 mm or less, 8.0 mm or less, 6.0 mm or less, 4.0 mm or less, or 3.0 mm or less.

[0032] The print layer may be composed of only a colored layer, a colorless and transparent layer, or a laminate having a colored layer and a colorless and transparent layer in this order from the outer sealant layer side.

[0033] The printing layer may be made of an ultraviolet curable resin.

[0034] Examples of the UV-curable resin that can be used to form the print layer include polyurethane acrylate, epoxy acrylate, acrylic resin acrylate, and polyester acrylate. For the UV-curable resin that forms the print layer, reference can be made to the description of the UV-curable resin that forms the overcoat layer above.

[0035] The print layer may or may not contain a pigment.

[0036] Examples of pigments that can be used include titanium oxide, lead chromate molybdate sulfate, lead yellow, iron oxide, calcium carbonate, barium sulfate, aluminum powder, zinc sulfide, synthetic mica, and natural mica. By including a pigment, the design properties can be improved.

[0037] The print layer may form a picture, a pattern, a symbol, or text information.

[0038] <Outer sealant layer> The outer sealant layer may be composed of a polyolefin resin, particularly a polyethylene resin, which improves adhesion between the outermost layer of the outer sealant layer and the innermost layer of the inner sealant layer when the outermost layer of the outer sealant layer and the innermost layer of the inner sealant layer are heat-sealed.

[0039] Here, in this specification, a polyethylene-based resin is a resin containing ethylene group repeating units in the polymer main chain at more than 50 mol%, 60 mol% or more, 70 mol% or more, 80 mol% or more, 90 mol% or more, or 95 mol% or more. For example, the polyethylene-based resin is selected from the group consisting of low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl acrylate copolymer (EMA), derivatives thereof, and mixtures thereof.

[0040] The outer sealant layer may be laminated or may include multiple polyethylene resins, and these layers may be laminated by any lamination means.

[0041] The thickness of the outer sealant layer is not particularly limited and may be, for example, 30 μm or more, 40 μm or more, 50 μm or more, 60 μm or more, 70 μm or more, 80 μm or more, 85 μm or more, 90 μm or more, or 95 μm or more, or may be 300 μm or less, 250 μm or less, 200 μm or less, 190 μm or less, 180 μm or less, 170 μm or less, 160 μm or less, 150 μm or less, 140 μm or less, 130 μm or less, 125 μm or less, 120 μm or less, 115 μm or less, 110 μm or less, or 105 μm or less.

[0042] The outer sealant layer may be a colored layer, a colorless transparent layer, or a transparent layer. If it is a colorless transparent layer or a transparent layer, the design can be further improved by the synergistic effect of the color of the intermediate layer or barrier layer and the printed layer.

[0043] <Middle class> The intermediate layer may be a single layer, or a plurality of intermediate layers may be laminated, or the intermediate layer may include a plurality of layers of the same type. These layers may be laminated by any lamination means.

[0044] The intermediate layer may be a thermoplastic resin layer, such as a layer made of a polyolefin resin, a vinyl polymer, a polyester resin, or a polyamide resin. In particular, by using a layer made of a polyester resin or a polyamide resin together with a polyethylene resin, either alone or in combination of two or more types, the strength can be improved and stiffness can be imparted.

[0045] The intermediate layer can be used in the form of a film or an extruded resin. The film may be a stretched film or a non-stretched film.

[0046] When the intermediate layer is composed of a stretched film, the stretched film constituting the intermediate layer may be a stretched film obtained by, for example, flat stretching, and may be a uniaxially stretched film or a biaxially stretched film. The biaxially stretched film may be a sequentially biaxially stretched film or a simultaneous biaxially stretched film, or may be a stretched film obtained by performing these stretching operations multiple times.

[0047] Examples of polyolefin resins that can be used include polyethylene resins and polypropylene resins. For the polyethylene resins, see the above description of the outer sealant layer.

[0048] In this specification, a polypropylene-based resin refers to a resin containing more than 50 mol%, 60 mol% or more, 70 mol% or more, 80 mol% or more, 90 mol% or more, or 95 mol% or more of repeating units of propylene groups in the main chain of the polymer, and examples thereof include polypropylene (PP) homopolymer, random polypropylene (random PP), block polypropylene (block PP), acid-modified polypropylene, derivatives thereof, and mixtures thereof.

[0049] Examples of vinyl polymers include ethylene vinyl alcohol copolymer (EVOH).

[0050] Examples of polyester resins include polyethylene terephthalate (PET) and polybutylene terephthalate.

[0051] Examples of polyamide resins include nylons such as Nylon (registered trademark) 6 and Nylon MXD6.

[0052] The intermediate layer may function as a substrate layer, a printable layer, or an adhesive layer.

[0053] For example, when the intermediate layer has polyethylene terephthalate (PET) as a function of the base layer, it is possible to improve strength and impart stiffness.

[0054] The intermediate layer may have an additional barrier layer in addition to the barrier layer between the intermediate layer and the inner sealant layer. The additional barrier layer in the intermediate layer can improve the barrier properties (preservation of contents). For the additional barrier layer, please refer to the description of the barrier layer below.

[0055] The intermediate layer may or may not contain a pigment.

[0056] Examples of pigments that can be used include titanium oxide, lead chromate molybdate sulfate, lead yellow, iron oxide, calcium carbonate, barium sulfate, aluminum powder, zinc sulfide, synthetic mica, and natural mica. By including a pigment, the design properties can be improved.

[0057] The thickness of the intermediate layer is not particularly limited and may be, for example, 20 μm or more, 30 μm or more, 40 μm or more, 50 μm or more, 55 μm or more, 60 μm or more, 65 μm or more, 70 μm or more, or 75 μm or more, or may be 200 μm or less, 190 μm or less, 180 μm or less, 170 μm or less, 160 μm or less, 150 μm or less, 140 μm or less, 130 μm or less, 125 μm or less, 120 μm or less, 115 μm or less, 110 μm or less, or 105 μm or less.

[0058] <Barrier layer> The barrier layer may be a metallized film, a metal compound deposited film, a silica deposited film, or a metal foil. The barrier layer may also be a combination thereof.

[0059] As the base film for the metal vapor deposition film, metal compound vapor deposition film, and silica vapor deposition film, polyethylene terephthalate (PET), nylon, etc. can be used.

[0060] The deposited metal of the metallized film may be, for example, aluminum, tin, copper, silver, gold, titanium, nickel, or indium.

[0061] The vapor deposited metal compound of the metal compound vapor deposited film may be, for example, aluminum oxide.

[0062] The base film of the metal vapor-deposited film, metal compound vapor-deposited film, and silica vapor-deposited film may be located on the intermediate layer side, and the vapor-deposited metal, vapor-deposited metal compound, and silica may be located on the inner sealant layer side.

[0063] The metal foil may be, for example, an aluminum foil, a copper foil, a titanium foil, an aluminum alloy foil, or a stainless steel foil, and it is particularly preferable to use an aluminum foil.

[0064] The thickness of the barrier layer is preferably 4 μm or more, 6 μm or more, 8 μm or more, 9 μm or more, or 10 μm or more from the viewpoint of ensuring strength and barrier properties, and the thickness of the barrier layer is preferably 70 μm or less, 60 μm or less, 50 μm or less, 40 μm or less, 35 μm or less, 30 μm or less, 25 μm or less, 20 μm or less, or 15 μm or less from the viewpoint of improving the handleability of the laminate for a laminated tube container.

[0065] <Inner sealant layer> The inner sealant layer has a thickness at least five times the thickness of the relief pattern formed by the printing layer.

[0066] The thickness of the inner sealant layer may be 6 times or more, 8 times or more, 10 times or more, or 12 times or more the thickness of the relief pattern formed by the printing layer, and may be 30 times or less, 25 times or less, 20 times or less, or 15 times or less.

[0067] The inner sealant layer may be composed of a polyolefin resin or a polyethylene resin. The use of a polyethylene resin improves the adhesion between the outermost layer of the outer sealant layer and the innermost layer of the inner sealant layer when the outermost layer of the outer sealant layer and the innermost layer of the inner sealant layer are heat-sealed. For details about the polyethylene resin, please refer to the above description of the outer sealant layer.

[0068] From the viewpoint of protecting the barrier layer, the tensile modulus of the inner sealant layer made of a polyethylene resin is preferably 300 MPa or less, 250 MPa or less, 200 MPa or less, or 150 MPa or less. The tensile modulus may be 50 MPa or more, 80 MPa or more, or 100 MPa or more. The "tensile modulus of the inner sealant layer made of a polyethylene resin" can be measured by subjecting a film to a tensile test in accordance with JIS-K-7127.

[0069] The inner sealant layer may be a laminate of multiple polyethylene resins or may contain multiple polyethylene resins, and these layers may be laminated by any lamination means.

[0070] The inner sealant layer may be a multi-layered structure that combines two or more types of polyethylene resin with, for example, polyester resin or polyamide resin. The presence of polyester resin or polyamide resin can improve strength and provide stiffness. For details about polyester resin and polyamide resin, please refer to the above description of the intermediate layer.

[0071] The thickness of the inner sealant layer is preferably 200 μm or less, 180 μm or less, 160 μm or less, 140 μm or less, 130 μm or less, 120 μm or less, 110 μm or less, 100 μm or less, 90 μm or less, 80 μm or less, 70 μm or less, 60 μm or less, 55 μm or less, or 50 μm or less, from the viewpoint of improving the handleability of the laminate for a laminated tube container.

[0072] <Other printing layers> The laminate for a laminated tube container may have a printed layer other than the printed layer forming the irregularities between the outer sealant layer and the intermediate layer. The laminate for a laminated tube container may also have another printed layer between the inner sealant layer and the barrier layer, between the printed layer forming the irregularities and the outer sealant layer, or between the intermediate layer and the barrier layer.

[0073] That is, as shown in FIG. 1( b ), another printed layer 160 may be configured between the outer sealant layer 120 and the intermediate layer 130 .

[0074] The printed layer other than the above printed layer forming the unevenness is not particularly limited, and for example, when laminating by flexographic printing, it may be a low-viscosity, quick-drying flexographic ink.

[0075] <<Method for manufacturing laminated body for laminated tube container>> The method for producing a laminate for a laminate tube container of the present invention includes the steps of: A method for producing a laminate for a laminated tube container, which has an overcoat layer, a print layer, an outer sealant layer, an intermediate layer, a barrier layer, and an inner sealant layer in this order, comprising: forming the overcoat layer and the print layer on the outer surface side of the outer sealant layer; and winding up the laminate; Includes At least a portion of the uneven shape formed by the printing layer has a thickness of 7.0 μm or more and an interval of 2.3 mm or more; and The inner sealant layer has a thickness that is at least five times the thickness of the texture.

[0076] According to the manufacturing method of the present invention, the laminate for a laminate tube container of the present invention can be manufactured.

[0077] Each component of the present invention will be described below.

[0078] <Preparation of Laminate> The laminate for a laminate tube container produced by the method of the present invention has an overcoat layer, a print layer, an outer sealant layer, an intermediate layer, and an inner sealant layer in this order.

[0079] In the laminate obtained by removing the overcoat layer and the print layer from the laminate for laminated tube containers, the layers can be laminated by a known method, for example, by laminating them with an adhesive using a dry lamination method.

[0080] The method of the present invention includes forming the overcoat layer and the printed layer having the irregularities formed thereon on the outer surface of the outer sealant layer. Specifically, for example, the overcoat layer and the printed layer can be formed on the outer surface of the outer sealant layer of the laminate excluding the overcoat layer and the printed layer.

[0081] The overcoat layer and the print layer may be formed by, for example, flexographic printing.

[0082] The amount of ultraviolet light irradiated onto the overcoat layer and the printing layer is, for example, 25 mJ / cm 2 More than 30mJ / cm 2 , 35 mJ / cm 2 , or 40 mJ / cm 2 The above is preferable from the viewpoint of ensuring the strength of the overcoat layer and the print layer.

[0083] For the outer sealant layer, barrier layer, inner sealant layer, overcoat layer, and print layer in the method for producing a laminate for laminated tube containers of the present invention, reference can be made to the above description of the first laminate for laminated tube containers.

[0084] <Winding of laminate> The method of the present invention includes winding up the laminate. The obtained laminate for a laminated tube container can be wound into a roll at a winding tension of 30 N / m or more, 40 N / m or more, 50 N / m or more, 60 N / m or more, 70 N / m or more, or 80 N / m or more.

[0085] The width of the laminate for laminated tube containers that can be wound up is preferably 50 mm or more, 70 mm or more, 90 mm or more, 100 mm or more, 105 mm or more, or 110 mm or more, and is preferably 400 mm or less, 300 mm or less, 290 mm or less, 280 mm or less, 275 mm, or 270 mm or less, from the viewpoint of improving the handleability of the laminate for laminated tube containers.

[0086] The length of the laminate for laminated tube containers that can be wound up is not particularly limited, and may be, for example, 100 m or more, 200 m or more, 300 m or more, or 400 m or more, or may be 1,000 m or less, 800 m or less, 700 m or less, or 600 m or less.

[0087] Laminated tube container In the laminated tube container of the present invention, the outer sealant layer and the inner sealant layer of the laminated body for laminated tube containers of the present invention are sealed together to form a cylindrical shape.

[0088] Laminated tube containers can be filled with contents such as medicines, cosmetics, and food, including toothpaste, moisturizing cream, and sunscreen.

[0089] The laminated tube container can be produced, for example, by a method including the following steps: The laminated tube container laminate is rolled up so that the inner sealant layer faces inward, and the ends of the laminate are overlapped and heat-sealed to form a side seam, thereby obtaining a body portion; and A head having a shoulder and a cap is joined to the periphery of the opening of the body to obtain a laminated tube container. [Example]

[0090] The present invention will be specifically explained with reference to examples and comparative examples, but the present invention is not limited to these.

[0091] Examples 1 and 2, and Comparative Examples 1 to 3 In Examples 1 and 2 and Comparative Examples 1 to 3, the discriminability based on the tactile sensation of the uneven shape was evaluated as follows.

[0092] <Creation of Laminate> Example 1 A laminate having the following layer configuration was prepared for the outer sealant layer, intermediate layer, barrier layer, and inner sealant layer: [LDPE (70 μm) (outer sealant layer)] / [LDPE (60 μm) / LDPE (30 μm) / PET (25 μm) / EAA (30 μm) (intermediate layer)] / [Al (20 μm) (barrier layer)] / [EMAA (55 μm) / LLDPE (55 μm) (inner sealant layer)]

[0093] A coating material mainly composed of polyurethane acrylate [SCK-16D, manufactured by Daido Chemical Industry Co., Ltd.] was laminated on the surface of the outer sealant layer as an overcoat layer and a printing layer to prepare a laminated tube container laminate of Example 1.

[0094] The above printing layer was printed twice by flexographic printing, coated to a thickness of 13.6 μm with a spacing of 2.5 mm, and applied to the coated object with 25 mJ / cm 2 The coating was cured by irradiating it with ultraviolet light.

[0095] The overcoat layer was applied by flexographic printing to a thickness of 1.5 μm on the entire surface of the printed layer and the outer sealant layer on which no printed layer was formed, and the coating was applied with 25 mJ / cm 2 The coating was cured by irradiating it with ultraviolet light.

[0096] Therefore, the laminate structure of the laminate for a laminate tube container of Example 1 was as follows: [Polyurethane acrylate (1.5 μm) (overcoat layer)] / [Polyurethane acrylate (thickness 13.6 μm and spacing 2.5 mm) (printing layer)] / [LDPE (70 μm) (outer sealant layer)] / [LDPE (60 μm) / LDPE (30 μm) / PET (25 μm) / EAA (30 μm) (intermediate layer)] / [Al foil (20 μm) (barrier layer)] / [EMAA (55 μm) / LLDPE (55 μm) (inner sealant layer)]

[0097] Example 2 A laminate for a laminated tube container of Example 2 was obtained in the same manner as Example 1, except that instead of the printed layer of Example 1, a printed layer coated by flexographic printing to a thickness of 7.4 μm in a single pass was used.

[0098] (Comparative Example 1) A laminate for a laminated tube container of Comparative Example 1 was obtained in the same manner as in Example 1, except that printed layers with a thickness of 5.4 μm and a spacing of 2.5 mm were formed instead of printed layers with a thickness of 13.6 μm and a spacing of 2.5 mm.

[0099] (Comparative Example 2) A laminate for a laminated tube container of Comparative Example 2 was obtained in the same manner as in Example 1, except that printed layers having a thickness of 13.6 μm and a spacing of 2.0 mm were formed instead of printed layers having a thickness of 13.6 μm and a spacing of 2.5 mm.

[0100] (Comparative Example 3) A laminate for a laminated tube container of Comparative Example 3 was obtained in the same manner as in Example 1, except that printed layers having a thickness of 13.6 μm and a spacing of 3.0 mm were formed instead of printed layers having a thickness of 13.6 μm and a spacing of 2.5 mm.

[0101] <evaluation> (Distinguishing ability by texture) The laminated bodies for laminated tube containers of Examples 1 and 2 and Comparative Examples 1 to 3 were prepared, and the distinguishability based on the tactile feel of the uneven shape was evaluated according to the following criteria. A: The uneven shape can be fully recognized by touch. B: The uneven shape cannot be fully recognized by touch.

[0102] The evaluation results are shown in Table 1.

[0103] [Table 1]

[0104] It can be seen from Table 1 that when the uneven shape has a predetermined thickness and interval, it can be distinguished by touch.

[0105] Examples 3 and 4, and Comparative Examples 4 and 5 In Examples 3 and 4 and Comparative Examples 4 and 5, the scratch resistance of the barrier layer was evaluated when the laminate for a laminated tube container was wound into a roll as described below.

[0106] <Creation of Laminate> Example 3 A laminate having the following layer configuration was prepared for the outer sealant layer, intermediate layer, barrier layer, and inner sealant layer: [LLDPE (50 μm) (outer sealant layer)] / [LDPE (40 μm) / Al-deposited PET (12 μm) / LDPE (110 μm) / LDPE (50 μm) (intermediate layer)] / [Silica-deposited PET (12 μm) (barrier layer)] / [LLDPE (100 μm) (inner sealant layer)]

[0107] The PET film that served as the base for the silica-deposited PET (barrier layer) was located on the intermediate layer side, and the deposited silica was located on the inner sealant layer side.

[0108] The tensile modulus of elasticity of the inner sealant layer in Example 3 was 156 MPa.

[0109] A printed layer with a thickness of 11.3 μm and a concave-convex pattern spaced 2.5 mm apart was formed on a portion of the outer sealant layer, and an overcoat layer with a thickness of 1.5 μm was formed on the printed layer and on the surface of the outer sealant layer where the printed layer was not formed. The overcoat layer had a tensile modulus of elasticity of 538 MPa after curing.

[0110] Therefore, the laminate structure of the laminate for a laminate tube container of Example 3 was as follows: [Polyurethane acrylate (1.5 μm) (overcoat layer)] / [Polyurethane acrylate (11.3 μm unevenness thickness and 2.5 mm unevenness spacing) (printed layer)] / [LLDPE (50 μm) (outer sealant layer)] / [LDPE (40 μm) / Al-vapor-deposited PET (12 μm) / LDPE (110 μm) / LDPE (50 μm) (intermediate layer)] / [Silica-vapor-deposited PET (12 μm) (barrier layer)] / [LLDPE (100 μm) (inner sealant layer)]

[0111] The PET film that served as the base for the silica-deposited PET (barrier layer) was located on the intermediate layer side, and the deposited silica was located on the inner sealant layer side.

[0112] Next, the resulting laminate for a laminate tube container having a width of 178 mm was wound up to 500 m at a winding tension of 80 N / m.

[0113] Example 4 A laminate for a laminated tube container of Example 4 was obtained in the same manner as in Example 3, except that the thickness of the inner sealant layer in Example 3 was changed to 60 μm, and the obtained laminate for a laminated tube container was wound up.

[0114] Comparative Example 4 A laminate for a laminated tube container of Comparative Example 4 was obtained in the same manner as in Example 3, except that printed layers with a thickness of 5.4 μm and a spacing of 2.5 mm were formed instead of printed layers with a thickness of 11.6 μm and a spacing of 2.5 mm, and the obtained laminate for a laminated tube container was wound up.

[0115] (Comparative Example 5) A laminate for a laminated tube container of Comparative Example 5 was obtained in the same manner as in Example 3, except that the thickness of the inner sealant layer in Example 3 was changed to 30 μm, and the obtained laminate for a laminated tube container was wound up.

[0116] <evaluation> (Distinguishing ability by texture) In the same manner as in Examples 1 and 2 and Comparative Examples 1 to 3, the tactile discrimination of the uneven shapes of the laminates for laminate tube containers of Examples 3 and 4 and Comparative Examples 4 and 5 was evaluated. The evaluation criteria were as follows: A: The uneven shape can be fully recognized by touch. B: The uneven shape cannot be fully recognized by touch.

[0117] (Scratch resistance of the barrier layer of laminated tube containers) The presence or absence of pinholes in the barrier layer of the wound laminate for a laminate tubular container of Examples 3 and 4 and Comparative Examples 4 and 5 was observed. The evaluation criteria were as follows: A: No pinholes were observed in the barrier layer. B: Pinholes were observed in the barrier layer.

[0118] The evaluation results are shown in Table 2.

[0119] [Table 2]

[0120] It can be seen from Table 2 that when the uneven shape has a predetermined thickness and interval, it can be distinguished by touch.

[0121] Furthermore, a comparison of Examples 3 and 4 with Comparative Example 5 in Table 2 reveals that when a winding tension is applied to the laminate for a laminated tube container and wound up to form a roll of the laminate for a laminated tube container, pinholes do not occur in the barrier layer of the laminate for a laminated tube container because the inner sealant layer has a predetermined thickness relative to the thickness of the uneven shape, resulting in good preservation of the contents. [Explanation of symbols]

[0122] 100 Laminated tube container laminate 110 Printing layer 120 outer sealant layer 130 Middle Class 140 Barrier Layer 150 Inner sealant layer 160 other printing layers

Claims

1. an overcoat layer, a printing layer, an outer sealant layer, an intermediate layer, a barrier layer, and an inner sealant layer, in this order; the inner sealant layer has a thickness at least five times the thickness of the uneven shape formed by the printing layer, At least a part of the uneven shape has a thickness of 7.0 μm or more and an interval of 2.3 mm or more. Laminated body for laminated tube containers.

2. 2. The laminate for a laminate tube container according to claim 1, wherein the overcoat layer and the print layer are made of an ultraviolet curable resin.

3. 2. The laminate for a laminate tube container according to claim 1, wherein the overcoat layer has a tensile modulus of elasticity of 400 MPa or more.

4. 2. The laminate for a laminate tube container according to claim 1, wherein the inner sealant layer has a tensile modulus of elasticity of 300 MPa or less.

5. the overcoat layer is a colorless and transparent layer, and the printed layer is a laminate having a colorless and transparent layer, a colored layer, or a colored layer and a colorless and transparent layer in this order from the outer sealant layer side; The laminate for a laminate tube container according to claim 1 .

6. The laminate for a laminate tube container according to claim 1 , wherein the printed layer forms a picture, a design, a symbol, or character information.

7. The laminate for a laminate tube container according to claim 1 , wherein the barrier layer comprises a metal vapor-deposited film, a metal compound vapor-deposited film, a silica vapor-deposited film, a metal foil, or a combination thereof.

8. A laminated tube container, comprising the laminate for a laminated tube container according to any one of claims 1 to 7, wherein the outer sealant layer and the inner sealant layer are sealed together to form a cylindrical shape.

9. A method for producing a laminate for a laminated tube container, which has an overcoat layer, a print layer, an outer sealant layer, an intermediate layer, a barrier layer, and an inner sealant layer in this order, comprising: forming the overcoat layer and the printing layer on the outer surface side of the outer sealant layer; and Winding up the laminated tube container laminate; Including, At least a part of the uneven shape formed by the printing layer has a thickness of 7.0 μm or more and an interval of 2.3 mm or more; and The inner sealant layer has a thickness that is 5 times or more the thickness of the uneven shape. A method for manufacturing a laminate for a laminate tube container.

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