Laminate, tube container, and tube container with cap

Abstract

To provide a laminate, a tube container, and a cap-attached tube container, that can improve slipperiness.SOLUTION: A laminate 60 comprises a first sealant layer 61, a substrate layer 62, and a second sealant layer 63 in this order. A coefficient of dynamic friction of the second sealant layer 63 with respect to metal is 0.10 or more to 0.20 or less.SELECTED DRAWING: Figure 4A

Description

[Technical Field]

[0001] The present disclosure relates to a laminate, a tube container, and a tube container with a cap. [Background technology]

[0002] Conventionally, laminated tube containers have been known as tube containers. Generally, laminated tube containers are composed of a body tube (laminated tube) and a head member including a mouth. The manufacturing process of laminated tube containers consists of a process of forming a body tube made of laminate layers into a cylinder and a process of molding a head member onto the body tube.

[0003] In the process of forming a cylindrical body tube made of laminate layers, the laminate is rolled up, and the outermost resin layer (sealant layer) surface and the innermost resin layer (sealant layer) surface of both edges of the laminate are overlapped. The overlapped portions are then welded together using a sealing member that performs heat sealing, for example, to produce the body tube (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-281094 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in conventional tube containers, the surface of the resin layer serving as the innermost layer may have insufficient slipperiness, which may result in scratches on the surface of the resin layer serving as the innermost layer when the body tube is formed into a tube. When scratches occur on the surface of the resin layer serving as the innermost layer, foreign matter resulting from the scratches may adhere to the sealing member, resulting in a decrease in the bonding strength of the laminate. Furthermore, when the surface of the resin layer serving as the innermost layer has insufficient slipperiness, the conveyability of the laminate may decrease, and the body tube may not be formed into a tube. In particular, when the process of forming the body tube into a tube is performed at high speed, there is a high possibility that scratches may occur on the surface of the resin layer serving as the innermost layer, or that the body tube may not be formed into a tube.

[0006] The present disclosure has been made in consideration of these points, and aims to provide a laminate, a tube container, and a tube container with a cap that are capable of improving slipperiness. [Means for solving the problem]

[0007] A laminate according to one embodiment comprises a first sealant layer, a base layer, and a second sealant layer in this order, wherein the second sealant layer has a dynamic friction coefficient against metal of 0.10 or more and 0.20 or less.

[0008] In one embodiment of the laminate, the second sealant layer has, from the base layer side, a first resin layer, a second resin layer, and a third resin layer, and the first resin layer, the second resin layer, and the third resin layer may contain linear low-density polyethylene.

[0009] In the laminate according to one embodiment, the third resin layer may further contain silicon dioxide.

[0010] In the laminate according to one embodiment, the content of silicon dioxide in the third resin layer may be 0.5% by weight or more and 50% by weight or less.

[0011] In the laminate according to one embodiment, the second resin layer may have a higher density than the first resin layer and the third resin layer.

[0012] In one embodiment of the laminate, the first sealant layer may comprise linear low density polyethylene.

[0013] In one embodiment, the laminate may further include an intermediate layer provided between the base material layer and the second sealant layer, and a barrier layer provided between the base material layer and the intermediate layer.

[0014] A tube container according to one embodiment is a tube container comprising a body tube formed by overlapping and joining opposing edges of a laminate according to the present disclosure, and a head member joined to one end of the body tube.

[0015] A tube container with a cap according to one embodiment is a tube container with a cap comprising the tube container according to the present disclosure and a cap attached to the head member. [Effects of the Invention]

[0016] According to the present disclosure, the slipperiness of the laminate can be improved. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a side view showing a tube container with a cap according to this embodiment, with the cap in a closed state. [Figure 2] FIG. 2 is a side view showing the capped tube container according to this embodiment, with the cap in an open state. [Figure 3] FIG. 3 is a partial vertical cross-sectional view showing a tube container with a cap according to this embodiment. [Figure 4A] FIG. 4A is a cross-sectional view showing an example of the layer structure of the laminate of the body tube of the capped tube container according to the present embodiment. [Figure 4B] FIG. 4B is a cross-sectional view showing another example of the layer structure of the laminate of the body tube of the capped tube container according to the present embodiment. [Figure 4C] FIG. 4C is a cross-sectional view showing another example of the layer structure of the laminate of the body tube of the capped tube container according to the present embodiment. [Figure 4D] FIG. 4D is a cross-sectional view showing another example of the layer structure of the laminate of the body tube of the capped tube container according to the present embodiment. [Figure 5] 5(a) to 5(d) are schematic diagrams showing a method for manufacturing a tube container according to this embodiment. [Figure 6] 6(a) and 6(b) are schematic diagrams showing a method for manufacturing a tube container according to this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] An embodiment will now be described with reference to the drawings. Figures 1 to 6 illustrate one embodiment. The following figures are schematic illustrations. Therefore, the size and shape of each part are appropriately exaggerated for ease of understanding. Furthermore, appropriate modifications can be made without departing from the technical concept. In the following figures, identical parts are designated by the same reference numerals, and some detailed descriptions may be omitted. Furthermore, the numerical values, such as dimensions, and material names of each component described in this specification are merely examples of an embodiment and are not limited to these. They may be selected and used as appropriate. In this specification, terms specifying shape or geometric conditions, such as parallel, orthogonal, and perpendicular, are used in their strict sense and also include substantially the same state. Figures 1 to 6 illustrate a capped tube container 10A in an empty state after filling with contents and without sealing the bottom.

[0019] As shown in FIGS. 1 to 3, a capped tube container 10A according to this embodiment includes a tube container 10 and a cap 20 attached to the tube container 10.

[0020] Of these, the tube container 10 includes a body tube 50 which is a laminated molded tube, and a head member 40 joined to one end 51 of the body tube 50 .

[0021] First, the head member 40 of the tube container 10 will be described.

[0022] As shown in FIG. 3, the head member 40 has a mouth portion 11 and a shoulder portion 12 provided below the mouth portion 11.

[0023] The mouth portion 11 includes a threaded portion 14 to which an inner cylindrical portion 28 (described later) of the cap 20 is screwed. The shape of the mouth portion 11 may be any conventionally known shape.

[0024] The shoulder portion 12 has a shape in which the diameter gradually increases from the mouth portion 11 side toward the body tube 50 side. The shoulder portion 12 has a circular horizontal cross section.

[0025] As will be described later, the head member 40 is formed by, for example, compression molding, and is made of, for example, a resin material such as high density polyethylene (HDPE).

[0026] Next, the body tube 50 of the tube container 10 will be described. The body tube 50 shown in Figures 1 to 3 has a generally cylindrical shape overall. This body tube 50 is composed of a laminated layered body 60 (see Figures 4A to 4D), and is obtained by rolling this layered body 60 into a cylindrical shape, overlapping opposing edges, and joining them together by, for example, heat sealing. Therefore, the body tube 50 has a joint 52 (see Figures 1 and 2) along its longitudinal direction where the layers 60 are joined together.

[0027] Next, the layer structure of the laminate 60 will be described. Figures 4A to 4D show an example of the layer structure of the laminate 60 that constitutes the trunk tube 50. As shown in Figures 4A to 4D, the laminate 60 includes a first sealant layer 61, a base layer 62, and a second sealant layer 63, in this order. As shown in Figures 4A and 4B, the laminate 60 may further include an intermediate layer 64 provided between the base layer 62 and the second sealant layer 63, and a barrier layer 65 provided between the base layer 62 and the intermediate layer 64.

[0028] Specifically, as shown in FIG. 4A , the laminate 60 includes, in this order, a first sealant layer 61, a first adhesive layer 71a, a first anchor coat layer 72a, a base layer 62, a printing layer 73, a second adhesive layer 71b, a concealing layer 74, a third adhesive layer 71c, a barrier layer 65, an intermediate layer 64, a second anchor coat layer 72b, a fourth adhesive layer 71d, and a second sealant layer 63. Of these, the first sealant layer 61 forms the outer surface of the body tube 50, and the second sealant layer 63 forms the inner surface of the body tube 50. The second sealant layer 63 includes, from the base layer 62 side, a first resin layer 63a, a second resin layer 63b, and a third resin layer 63c. That is, the second sealant layer 63 is multilayered. However, this is not limiting, and the second sealant layer 63 may be a single layer, as shown in FIG. 4B .

[0029] As shown in FIG. 4C , the laminate 60 includes a first sealant layer 61, a first adhesive layer 71a, a base layer 62, a printed layer 73, a second adhesive layer 71b, and a second sealant layer 63, in this order. The first sealant layer 61 forms the outer surface of the body tube 50, and the second sealant layer 63 forms the inner surface of the body tube 50. The second sealant layer 63 includes, from the base layer 62 side, a first resin layer 63a, a second resin layer 63b, and a third resin layer 63c. In other words, the second sealant layer 63 is multilayered. However, the present invention is not limited to this, and the second sealant layer 63 may be a single layer, as shown in FIG. 4D .

[0030] Each layer of the laminate 60 will now be described.

[0031] First Sealant Layer The first sealant layer 61 is a layer for bonding the laminates 60 together, and any material that melts and fuses when heated can be used for the first sealant layer 61. For example, a polyolefin film can be used for the first sealant layer 61. More specifically, the first sealant layer 61 can be made of one or more of the following resins: a low-density polyethylene (LDPE) film, a medium-density polyethylene (MDPE) film, a high-density polyethylene (HDPE) film, a linear low-density polyethylene (LLDPE) film, a polypropylene film, an acid-modified polyolefin resin film obtained by modifying a polyolefin resin such as polyethylene or polypropylene with acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, or other unsaturated carboxylic acid; a polyvinyl acetate resin film, a polyester resin film, a polystyrene resin film, polyacrylonitrile, saturated polyester, polyvinyl alcohol, or other resins.

[0032] Here, low density polyethylene has a density of 910 kg / m 3 More than 930kg / m 3 Medium density polyethylene has a density of 930 kg / m 3 More than 942kg / m 3 Furthermore, high density polyethylene has a density of 942 kg / m 3 Low-density polyethylene is obtained by polymerizing ethylene at a high pressure, for example, from 1,000 to less than 2,000 atmospheres. Medium-density polyethylene and high-density polyethylene are obtained by polymerizing ethylene at a medium or low pressure, for example, from 1 to less than 1,000 atmospheres.

[0033] It should be noted that medium-density polyethylene and high-density polyethylene may partially contain a copolymer of ethylene and an α-olefin. Even when ethylene is polymerized at medium or low pressure, medium-density or low-density polyethylene can be produced if a copolymer of ethylene and an α-olefin is contained. The linear low-density polyethylene described above is such a polyethylene. Linear low-density polyethylene is obtained by copolymerizing an α-olefin with a linear polymer obtained by polymerizing ethylene at medium or low pressure to introduce short-chain branches. Examples of α-olefins include 1-butene (C4), 1-hexene (C6), 4-methylpentene (C6), and 1-octene (C8). The density of linear low-density polyethylene is, for example, 915 kg / m 3 More than 945kg / m 3 The following is the result.

[0034] The first sealant layer 61 preferably contains linear low-density polyethylene. When the first sealant layer 61 contains linear low-density polyethylene, the bonding strength between the first sealant layer 61 and the second sealant layer 63 can be improved when the first sealant layer 61 and the second sealant layer 63 are bonded to each other. Examples of linear low-density polyethylene that can be used include Ultzex ​​(registered trademark) 2021I (product name) manufactured by Prime Polymer Co., Ltd., Ultzex ​​(registered trademark) 3520L (product name) manufactured by Prime Polymer Co., Ltd., and Kernel (registered trademark) KMB-16F (product name) manufactured by Japan Polyethylene Corporation.

[0035] In the present embodiment, the heat-sealable film can be prepared, for example, by preparing a resin composition using one or more of the above-mentioned resins as the main component, optionally adding desired additives thereto, and then using the resin composition prepared above, for example, by a T-die method, an inflation method, or other molding method to form a film or sheet.

[0036] The material for the first sealant layer 61 may contain, for example, an antiblocking agent, a lubricant (fatty acid amide, etc.), a flame retardant, an inorganic or organic filler, or the like.

[0037] In this embodiment, the thickness of the first sealant layer 61 is preferably 50 μm or more and 250 μm or less.

[0038] Base layer and intermediate layer The base layer 62 and intermediate layer 64 are layers that support the first sealant layer 61 and the second sealant layer 63, for example, and increase the strength of the entire laminate 60. Materials that can be used to form the base layer 62 and intermediate layer 64 include, for example, films or sheets of polyester resins, polyamide resins, polyaramid resins, polyolefin resins, polycarbonate resins, polyacetal resins, fluorine-based resins, and other tough resins. As an example, the base layer 62 and intermediate layer 64 may contain polyethylene terephthalate. Examples of polyolefin resins that can be used include films of extruded low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, and high-density polyethylene.

[0039] The resin film or sheet may be an unstretched film, a uniaxially or biaxially stretched film, etc. Among these, a biaxially stretched polyester resin film is preferred in the present embodiment because of its excellent printability.

[0040] In this embodiment, the thickness of each of the base layer 62 and the intermediate layer 64 is preferably 10 μm or more and 25 μm or less.

[0041] Second Sealant Layer The second sealant layer 63 is a layer for bonding the laminates 60 together, and the material constituting the second sealant layer 63 may be, for example, the same material as that of the first sealant layer 61 described above.

[0042] In this embodiment, the dynamic friction coefficient of the second sealant layer 63 with respect to metal is 0.10 or more and 0.20 or less. Since the dynamic friction coefficient of the second sealant layer 63 with respect to metal is 0.10 or more, when the laminate 60 is wrapped around the outer surface of the cylindrical inner seal member 80, as described below, the laminate 60 can be easily wrapped around the inner seal member 80. This improves the handleability of the laminate 60 when the laminate 60 is rolled and the opposing edges are joined by heat sealing. Furthermore, since the dynamic friction coefficient of the second sealant layer 63 with respect to metal is 0.20 or less, the slipperiness of the laminate 60 can be improved. This can prevent scratches from occurring on the second sealant layer 63 when the laminate 60 is wrapped around the inner seal member 80, as described below. Furthermore, since scratches on the second sealant layer 63 can be prevented, foreign matter caused by scratches on the second sealant layer 63 can be prevented from adhering to the inner seal member 80, as described below. The dynamic friction coefficient of the second sealant layer 63 against metal may be adjusted by selecting a resin material used for the second sealant layer 63, as described below, or by applying varnish or the like to the second sealant layer 63. The dynamic friction coefficient of the second sealant layer 63 against metal can be measured by the following dynamic friction coefficient measurement test.

[0043] (Dynamic friction coefficient measurement test) The dynamic friction coefficient is measured according to JIS K 7125:1999. Specifically, the dynamic friction coefficient is measured according to JIS K 7125:1999, Section 8.2, "Measurement of Films in Contact with Metals or Other Materials." First, the laminate is cut into an 80 mm x 200 mm test piece. A mating material is prepared to contact the cut-out test piece. In this case, the mating material is made of metal, such as stainless steel. Next, the test piece is placed on the mating material with the second sealant layer 63 facing the mating material, and a sliding piece is placed on top of it. Rubber is attached to the bottom of the sliding piece, and the total weight of the sliding piece and rubber is 200 g. The test piece and the sliding piece are then brought into close contact with each other to prevent slippage. Next, the sliding piece is pulled at a speed of 100 mm / min, and the dynamic friction force (N) between the test piece and the mating material is measured. The dynamic friction force is divided by the normal force of the sliding piece (1.96 N) to calculate the dynamic friction coefficient. The dynamic friction coefficient is determined from the average value for the first 30 mm after the start of the relative shear movement between the test piece and the mating material, ignoring the peak of the static friction force. The load cell is connected directly to the sliding piece.

[0044] 4A and 4C, when the second sealant layer 63 includes a first resin layer 63a, a second resin layer 63b, and a third resin layer 63c, the first resin layer 63a, the second resin layer 63b, and the third resin layer 63c preferably contain linear low-density polyethylene. The first resin layer 63a, the second resin layer 63b, and the third resin layer 63c each contain linear low-density polyethylene, thereby improving the bonding between the second sealant layer 63 and the first sealant layer 61. The density of the second resin layer 63b is preferably higher than the densities of the first resin layer 63a and the third resin layer 63c. This increases the density of the second sealant layer 63. This increases the rigidity of the second sealant layer 63, thereby easily improving the slipperiness of the second sealant layer 63.

[0045] Furthermore, when the third resin layer 63c contains linear low-density polyethylene, it is preferable that the third resin layer 63c further contains silicon dioxide. In this case, silicon dioxide functions as a so-called antiblocking agent. By including silicon dioxide as an antiblocking agent in the third resin layer 63c, the slipperiness of the second sealant layer 63 can be improved even when the third resin layer 63c contains low-density linear low-density polyethylene. Furthermore, even when the produced laminate 60 is wound into a roll and stored, it is possible to prevent the first sealant layer 61 and the second sealant layer 63 from adhering to each other and becoming unable to be separated. The content of silicon dioxide in the third resin layer 63c is preferably 0.5% by weight or more and 50% by weight or less. By making the silicon dioxide content in the third resin layer 63c 0.5 wt % or more, it is possible to more effectively improve the slipperiness of the second sealant layer 63 and more effectively prevent the first sealant layer 61 and the second sealant layer 63 from adhering to each other. Furthermore, by making the silicon dioxide content in the third resin layer 63c 50 wt % or less, it is possible to prevent a decrease in the bonding strength between the first sealant layer 61 and the second sealant layer 63 and to improve the slipperiness.

[0046] On the other hand, as shown in Figures 4B and 4D, when the second sealant layer 63 is a single layer, the second sealant layer 63 preferably contains linear low-density polyethylene. By including linear low-density polyethylene in the second resin layer 63b, the density of the second sealant layer 63 can be increased compared to when the second resin layer 63b is made of low-density polyethylene. This increases the rigidity of the second sealant layer 63, which can easily improve the slipperiness of the second sealant layer 63. Furthermore, increasing the rigidity of the second sealant layer 63 can improve the scratch resistance of the second sealant layer 63.

[0047] In this embodiment, the thickness of the second sealant layer 63 is preferably 50 μm or more and 250 μm or less.

[0048] Barrier layer The barrier layer 65 is a layer for preventing the permeation of oxygen gas, water vapor, and the like. For example, a gas barrier material against oxygen gas, water vapor, and the like, a light-shielding material against sunlight, and a material that has aroma retention properties for the contents can be used as the barrier layer 65. Specifically, for example, aluminum foil, tin, lead, copper, iron, nickel, or alloys thereof, or a thin vapor-deposited metal layer of aluminum or the like can be used as the barrier layer 65. When aluminum foil is used as the barrier layer 65, the thickness of the barrier layer 65 can be approximately 5 μm or more and 20 μm or less.

[0049] Furthermore, when a metal vapor deposition layer such as aluminum is used as the barrier layer 65, a vapor deposition thin film of a metal such as aluminum can be formed on the intermediate layer 64 using, for example, a physical vapor deposition method (PVD method) such as vacuum deposition, sputtering, ion plating, or cluster ion beam method.

[0050] When a metal vapor-deposited aluminum layer is used as the barrier layer 65, the thickness of the barrier layer 65 is preferably about 50 Å to 3000 Å, and particularly preferably about 100 Å to 2000 Å. The surface of the intermediate layer 64 supporting the vapor-deposited thin aluminum film can be coated in advance with, for example, a vapor deposition primer to improve the adhesion of the vapor-deposited film, and other required pretreatments can also be applied as desired.

[0051] Alternatively, the barrier layer 65 may be a transparent vapor-deposited layer that can be formed by a conventionally known method. In this case, the barrier layer 65 may be a transparent vapor-deposited layer made of an inorganic oxide.

[0052] The transparent vapor-deposited layer may be, for example, a vapor-deposited layer of an oxide of silicon (Si), aluminum (Al), magnesium (Mg), calcium (Ca), potassium (K), tin (Sn), sodium (Na), boron (B), titanium (Ti), lead (Pb), zirconium (Zr), yttrium (Y), etc. In particular, for tubular containers, it is preferable to provide a vapor-deposited layer of aluminum oxide or silicon oxide.

[0053] Inorganic oxides are expressed as, for example, SiO X , AlO X MO etc. X (wherein, M represents an inorganic element, and the value of X varies depending on the inorganic element.) The value of X can range from 0 to 2 for silicon (Si), 0 to 1.5 for aluminum (Al), 0 to 1.5 for magnesium (Mg), 0 to 1 for calcium (Ca), 0 to 1 for potassium (K), 0 to 0.5 for tin (Sn), 0 to 2 for sodium (Na), 0 to 0.5 for boron (B), 0 to 1.5 for titanium (Ti), 0 to 2 for lead (Pb), 0 to 2 for zirconium (Zr), and 0 to 1.5 for yttrium (Y). In the above, when X=0, it is a completely inorganic element (pure substance) and is not transparent, and the upper limit of the range of X is the value when it is completely oxidized. Silicon (Si) and aluminum (Al) are preferably used for packaging materials, with silicon (Si) having a value in the range of 1.0 to 2.0 and aluminum (Al) having a value in the range of 0.5 to 1.5.

[0054] The thickness of the transparent vapor-deposited layer varies depending on the type of inorganic oxide used, but is desirably selected from the range of, for example, 50 to 2000 Å, preferably 100 to 1000 Å. For example, in the case of a vapor-deposited layer of aluminum oxide or silicon oxide, the thickness is desirably 50 to 500 Å, more preferably 100 to 300 Å.

[0055] The transparent vapor deposition layer can be formed on the intermediate layer 64 using the following formation methods. Examples of methods for forming a vapor deposition layer include physical vapor deposition (PVD) methods such as vacuum deposition, sputtering, and ion plating, and chemical vapor deposition (CVD) methods such as plasma enhanced chemical vapor deposition, thermal chemical vapor deposition, and photochemical vapor deposition. Specifically, a vapor deposition layer can be formed on a forming roller using a roller-type vapor deposition layer forming device.

[0056] adhesive layer Adhesive layers such as the first adhesive layer 71a, the second adhesive layer 71b, the third adhesive layer 71c, and the fourth adhesive layer 71d are layers for bonding together the first sealant layer 61, the base material layer 62, the intermediate layer 64, the second sealant layer 63, etc. These adhesive layers can be appropriately selected depending on the resins that make up the layers to be bonded.

[0057] As the adhesive layer, for example, anchor coating agents such as isocyanate-based (urethane-based), polyethyleneimine-based, polybutadiene-based, and organic titanium-based, or polyurethane-based, polyacrylic-based, polyester-based, epoxy-based, polyvinyl acetate-based, cellulose-based, and other laminating adhesives can be used as desired.

[0058] In addition, for example, polyethylene, polypropylene, linear low-density polyethylene, ethylene-vinyl alcohol, ethylene-methacrylic acid copolymer (EMAA), ethylene-acrylic acid copolymer, ionomer, maleic anhydride-modified polyolefin resin, etc. can be suitably used as the adhesive layer.

[0059] In this embodiment, the thickness of the adhesive layer is preferably 3 μm or more and 60 μm or less.

[0060] The first sealant layer 61, the base layer 62, the intermediate layer 64, the second sealant layer 63, etc. may be laminated together by any method, such as wet lamination, dry lamination, solventless dry lamination, extrusion lamination, T-die coextrusion molding, coextrusion lamination, inflation, or any other method. When laminating as described above, the film may be subjected to pretreatment such as corona treatment or ozone treatment, if necessary.

[0061] Anchor coat layer The anchor coat layers, such as the first anchor coat layer 72a and the second anchor coat layer 72b, are layers for enhancing interlayer adhesion. These anchor coat layers are formed by applying and drying an anchor coat agent. Examples of anchor coat agents include any resin with a heat resistance temperature of 135°C or higher, such as vinyl-modified resin, epoxy resin, urethane resin, polyester resin, or polyethyleneimine. In particular, anchor coat agents that are cured products of polyacrylic or polymethacrylic resins (polyols) containing two or more hydroxyl groups in their structure and an isocyanate compound as a curing agent are preferred. A silane coupling agent may also be used as an additive, and soluble nitrocellulose may also be used to enhance heat resistance. The anchor coat layer after drying preferably has a thickness of 1 μm to 10 μm.

[0062] printing layer The printed layer 73 is a layer on which a picture or the like is printed, and is a layer for improving the design of the laminate 60. The printed layer 73 may be an ink composition obtained by adjusting the ink composition by adding, as the main component, one or more of ordinary ink vehicles, if necessary, optionally one or more of plasticizers, stabilizers, antioxidants, light stabilizers, ultraviolet absorbers, curing agents, crosslinking agents, lubricants, antistatic agents, fillers, and other additives, and further adding a colorant such as a dye or pigment, and thoroughly kneading the mixture with a solvent, a diluent, etc. Examples of such ink vehicles include linseed oil, tung oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin-modified resin, shellac, alkyd resin, phenolic resin, maleic acid resin, natural resin, hydrocarbon resin, polyvinyl chloride resin, polyacetic acid resin, polystyrene resin, polyvinyl butyral resin, acrylic or methacrylic resin, polyamide resin, polyester resin, polyurethane resin, epoxy resin, urea resin, melamine resin, aminoalkyd resin, nitrocellulose, ethyl cellulose, chlorinated rubber, cyclized rubber, and others, and one or more of these may be used in combination. The printing method may be gravure printing, letterpress printing, screen printing, transfer printing, flexographic printing, or other printing methods.

[0063] Hidden layer The concealing layer 74 is a layer that prevents color changes or variations in the intermediate layer 64, etc. from affecting the color of the pattern, etc., of the printed layer 73. An olefin resin can be used for the concealing layer 74. More specifically, it is preferable to use a polyethylene film such as low-density polyethylene, linear low-density polyethylene, or medium-density polyethylene as the concealing layer 74. These polyethylene films may be colored, for example, like a milky white polyethylene film. The thickness of the concealing layer is preferably 50 μm or more and 200 μm or less.

[0064] In the tube container 10 according to this embodiment, the body tube 50 and the head member 40 are joined by thermal welding when the head member 40 is molded by compression molding, as will be described later. However, the joining is not limited to this, and the body tube 50 and the head member 40 may also be joined by injection molding.

[0065] Next, the cap 20 will be described.

[0066] 1 to 3, the cap 20 has a head 21 and a cover 22 connected to the head 21. The head 21 and the cover 22 are connected to each other via a pair of connectors 23 each having a hinge 25 at its center. This allows the cover 22 to freely rotate relative to the head 21 around the hinge 25 of the connector 23 as an axis, and serves as a lid that covers the top surface of the head 21. The head 21, the cover 22, and the pair of connectors 23 are integrally formed from injected resin, as will be described later.

[0067] As shown in FIG. 3 , the head 21 includes an inner tube 28 attached to the tube container 10, an outer tube 27 positioned radially outward of the inner tube 28, and an upper plate 29 disposed above the inner and outer tubes 28 and having a spout 26 formed therein. The inner tube 28 is attached to the mouth 11 of the head member 40. The outer tube 27, inner tube 28, and upper plate 29 are integrally formed from an injection molded resin. The upper plate 29 is flat and has a generally circular shape in plan view. A downwardly protruding annular undercut 29a is provided at the approximate center of the upper plate 29, ensuring a more complete fit with the mouth 11 of the head member 40. The spout 26 is eccentrically positioned away from the connector 23 for ease of use during spouting. Alternatively, the spout 26 may be provided at the approximate center of the upper plate 29.

[0068] The cover 22 has a flat lid plate 32 and a substantially cylindrical side wall 33 formed to surround the periphery of the lid plate 32. As shown in Figure 3, the lid plate 32 has a downwardly protruding annular undercut 35, which more completely fits with a fitting portion 36 on the inner wall of the spout 26. A protrusion 37 is formed on the inside edge of the side wall 33 of the cover 22 at the portion with the largest radius of rotation. This protrusion 37 fits into a recess 38 formed in the upper surface of the top plate 29 of the head 21, thereby reliably locking the cover 22 onto the top plate 29. In addition, a protruding piece 39 that makes it easier to open the cover 22 is provided at the portion with the largest radius of rotation about the hinge 25 of the lid plate 32 as the rotation axis.

[0069] As shown in Figures 1 to 3, the surface of the cover 22 (the surface of the closed lid plate 32) is molded flat, so that the product produced by filling the tube container 10 with contents can stand upright (stand upright with the top facing downwards) and can be placed upside down when displayed in a store or when not in use. Furthermore, the center of the lid plate 32 can be made slightly concave to stabilize the product's ability to stand upright. Also, a recess 31 is formed in the outer tube portion 27 of the head 21, in a portion that corresponds to the lower part of the protruding piece 39 when the cap 20 is closed, and is recessed inward from the rest of the body. This makes it easier for fingers to grip the protruding piece 39.

[0070] Next, a method for manufacturing the above-described tube container 10 will be described with reference to FIGS. 5(a)-(d) and 6(a)-(b).

[0071] 5(a), a laminate 60 is prepared. In this case, for example, the laminate 60 is prepared which includes a first sealant layer 61, a first adhesive layer 71a, a first anchor coat layer 72a, a base material layer 62, a printing layer 73, a second adhesive layer 71b, a concealing layer 74, a third adhesive layer 71c, a barrier layer 65, an intermediate layer 64, the second anchor coat layer 72b, a fourth adhesive layer 71d, and a second sealant layer 63 in this order.

[0072] Next, the laminate 60 is rolled and the opposing edges are joined, for example, by heat sealing, to form a cylindrical tube, thereby producing the body tube 50. First, as shown in FIGS. 5(b)-(c), the laminate 60 is wrapped around the outer surface of a cylindrical inner seal member 80, overlapping the opposing edges of the laminate 60. The laminate 60 is then wrapped around the inner seal member 80 so that the second sealant layer 63 of the laminate 60 faces the outer surface of the inner seal member 80. In this embodiment, the dynamic friction coefficient of the second sealant layer 63 with respect to the material (metal) of the inner seal member 80 is 0.10 or more and 0.20 or less. Since the dynamic friction coefficient of the second sealant layer 63 with respect to the material of the inner seal member 80 is 0.10 or more, the laminate 60 can be easily wrapped around the outer surface of the cylindrical inner seal member 80. This improves the ease of handling of the laminate 60 when the laminate 60 is rolled up and the opposing edges are joined by heat sealing. Furthermore, since the dynamic friction coefficient of the second sealant layer 63 with respect to the material of the inner seal member 80 is 0.20 or less, the sliding properties of the laminate 60 relative to the inner seal member 80 can be improved, and scratches on the second sealant layer 63 of the laminate 60 can be suppressed. The inner seal member 80 can be made of metal, such as stainless steel. When the opposing edges of the laminate 60 are overlapped, the laminate 60 is conveyed downstream (to the left in FIGS. 5(b)-(c)) by guide rolls (not shown).

[0073] 5(c), an outer seal member 81 is pressed against the overlapping portion of the opposing edges of the laminate 60, and the overlapping portion of the opposing edges of the laminate 60 is sandwiched between the inner seal member 80 and the outer seal member 81. Next, the overlapping portion of the opposing edges of the laminate 60 is joined by heat sealing.

[0074] Thereafter, the joined laminate 60 is cut into individual body tubes 50. In this manner, the body tubes 50 are produced as shown in Fig. 5(d). At this time, the speed at which the body tubes 50 are produced may be about 300 tubes / min.

[0075] Next, the joined laminate 60 (body tube 50) is used to manufacture the above-mentioned tube container 10 by compression molding.

[0076] 6(a), the cylindrical laminate 60 (body tube 50) is wound around a mandrel 82, and a mold 83 for compression molding the head member 40 is attached to one end of the mandrel 82. That is, the laminate 60 (body tube 50), which has been previously molded into a cylindrical shape, is wound around the mandrel 82, the tip of which serves as a core for compression molding the head member 40, and is then advanced to a predetermined position into the cavity of the mold 83 for molding the head member 40.

[0077] Next, molten resin is supplied from a resin supply device (not shown) into the mold 83 to compression-mold the head member 40. In this case, one end 51 of the body tube 50 is inserted into the mold 83 to mold the head member 40, and at the same time, the body tube 50 is fused integrally to the head member 40. Thereafter, the integrated head member 40 and body tube 50 are removed from the mold 83 and mandrel 82 to obtain the tube container 10 (see FIG. 6(b)).

[0078] When manufacturing the capped tube container 10A, the cap 20 is prepared in parallel with the production of the tube container 10. In this case, the cap 20 is produced by injection molding using, for example, an injection molding machine (not shown). The cap 20 is then screwed onto the opening of the head member 40 of the tube container 10, thereby obtaining the capped tube container 10A shown in FIG.

[0079] Thereafter, the contents are filled into the body tube 50 of the capped tube container 10A from the bottom side, and the bottom of the body tube 50 is sealed, thereby obtaining the capped tube container 10A filled with the contents as a product.

[0080] As described above, according to this embodiment, the second sealant layer 63 has a dynamic friction coefficient with respect to metal of 0.10 or more and 0.20 or less. Since the second sealant layer 63 has a dynamic friction coefficient with respect to metal of 0.10 or more, the laminate 60 can be easily wrapped around the cylindrical inner seal member 80 when the laminate 60 is wrapped around the outer surface of the inner seal member 80. This improves the handleability of the laminate 60 when the laminate 60 is rolled and the opposing edges are joined by heat sealing. Furthermore, since the second sealant layer 63 has a dynamic friction coefficient with respect to metal of 0.20 or less, the slipperiness of the laminate 60 with respect to the inner seal member 80 can be improved. This prevents scratches from occurring on the second sealant layer 63 of the laminate 60. As a result, adhesion of foreign matter caused by scratches on the second sealant layer 63 to the inner seal member 80 can be prevented. This prevents a decrease in the bonding strength between the first sealant layer 61 and the second sealant layer 63. Furthermore, since the sliding property of the laminate 60 relative to the inner seal member 80 can be improved, it is possible to suppress the problem of being unable to form the body tube 50 into a tube, even when the process of forming the body tube 50 into a tube is carried out at high speed.

[0081] According to this embodiment, the second sealant layer 63 includes, from the base layer 62 side, a first resin layer 63a, a second resin layer 63b, and a third resin layer 63c. The first resin layer 63a, the second resin layer 63b, and the third resin layer 63c each contain linear low-density polyethylene. This improves the bonding between the second sealant layer 63 and the first sealant layer 61. Furthermore, since the second resin layer 63b contains linear low-density polyethylene, the density of the second sealant layer 63 can be increased compared to when the second resin layer 63b is made of low-density polyethylene. This increases the rigidity of the second sealant layer 63, and easily improves the slipperiness of the second sealant layer 63.

[0082] Furthermore, according to the present embodiment, the third resin layer 63c further contains silicon dioxide. This can improve the slipperiness of the second sealant layer 63, even when the third resin layer 63c contains linear low-density polyethylene. Furthermore, even when the produced laminate 60 is wound into a roll and stored, it can prevent the first sealant layer 61 and the second sealant layer 63 from adhering to each other and becoming unable to be separated.

[0083] Furthermore, according to this embodiment, the density of the second resin layer 63b is higher than the densities of the first resin layer 63a and the third resin layer 63c. This allows the density of the second sealant layer 63 to be increased. This allows the rigidity of the second sealant layer 63 to be increased, and the slipperiness of the second sealant layer 63 can be easily improved. Furthermore, since the rigidity of the second sealant layer 63 can be increased, the scratch resistance of the second sealant layer 63 can be improved.

[0084] Furthermore, according to the present embodiment, the first sealant layer 61 contains linear low-density polyethylene, which improves the bonding strength between the first sealant layer 61 and the second sealant layer 63 when the first sealant layer 61 and the second sealant layer 63 are bonded to each other.

[0085] Moreover, according to this embodiment, the laminate 60 further includes an intermediate layer 64 provided between the base material layer 62 and the second sealant layer 63, and a barrier layer 65 provided between the intermediate layer 64 and the second sealant layer 63. This can improve the barrier properties of the laminate 60. [Example]

[0086] Next, a specific example of the above embodiment will be described.

[0087] Example 1-A The laminate 60 shown in FIG. 4A was produced. First, a linear low-density polyethylene film (thickness: 100 μm) was prepared as the concealing layer 74. Furthermore, a biaxially oriented polyethylene terephthalate film (thickness: 12 μm) provided with an aluminum vapor-deposited layer (barrier layer 65) was prepared as the barrier layer 65 and intermediate layer 64. Next, the concealing layer 74 and the intermediate layer 64 provided with the barrier layer 65 were bonded together by dry lamination to produce a first intermediate body. The layer structure of the first intermediate body is as follows: LLDPEF / DL / ALM / PET In the above, "LLDPE" means linear low-density polyethylene (hereinafter the same). Also, "DL" means a two-component curing urethane adhesive (base: polyester resin, curing agent: aliphatic polyisocyanate, dry mass 3.5 g / m 2 ) is used to form an adhesive layer by the dry lamination method (same below). Also, "ALM" means an aluminum vapor deposition layer (same below). Furthermore, "PET" means biaxially oriented polyethylene terephthalate (same below).

[0088] Next, a resin film having a first resin layer 63a, a second resin layer 63b, and a third resin layer 63c in this order was prepared as the second sealant layer 63. First, linear low-density polyethylene (UltZex (registered trademark), 2021I, manufactured by Prime Polymer Co., Ltd.) was prepared as the resin for the first resin layer 63a. Furthermore, linear low-density polyethylene (UltZex (registered trademark), 3520L, manufactured by Prime Polymer Co., Ltd.) was prepared as the resin for the second resin layer 63b. Furthermore, a resin containing silicon dioxide in linear low-density polyethylene (UltZex (registered trademark), 2021I, manufactured by Prime Polymer Co., Ltd.) was prepared as the resin for the third resin layer 63c. The silicon dioxide content was 10% by weight. Next, these resins were formed into a film by an inflation method to obtain a resin film (thickness 80 μm, thickness ratio of each layer (first resin layer: second resin layer: third resin layer) = 1:2:1) for the second sealant layer 63. The layer structure of the resin film is as follows: LLDPE / LLDPE / LLDPE+Silica In the above, "silica" means silicon dioxide (the same applies hereinafter).

[0089] Next, a second sealant layer 63 was laminated on the first intermediate body using a sand lamination method to produce a second intermediate body. At this time, an ethylene-methacrylic acid copolymer was extruded as an adhesive layer onto the intermediate layer 64 of the first intermediate body via an anchor coating material, and the second sealant layer 63 was laminated on the adhesive layer using a sand lamination method. The thickness of the adhesive layer was 25 μm. The layer structure of the second intermediate body was as follows. LLDPEF / DL / ALM / PET / Anchor / EMAA / (LLDPE / LLDPE / LLDPE+Silica) In the above, "anchor" means an anchor coat layer (the same applies hereinafter), and "EMAA" means an ethylene-methacrylic acid copolymer as an adhesive layer (the same applies hereinafter).

[0090] A linear low-density polyethylene film (thickness: 80 μm) was prepared as the first sealant layer 61. Furthermore, a biaxially oriented polyethylene terephthalate film (thickness: 12 μm) was prepared as the base material layer 62. Subsequently, a printed layer 73 was formed on the biaxially oriented polyethylene terephthalate film.

[0091] Next, a laminate 60 was produced by laminating the first sealant layer 61, the base layer 62, and the second intermediate body described above using a sand lamination method. At this time, polyethylene was extruded onto the base layer 62 as an adhesive layer via an anchor coating material, and the first sealant layer 61 was laminated onto the adhesive layer using a sand lamination method. Polyethylene was also extruded onto the printing layer 73 as an adhesive layer, and the second intermediate body was laminated onto the adhesive layer using a sand lamination method. Each adhesive layer had a thickness of 25 μm. In this way, three laminates 60 shown in FIG. 4A were produced (Samples 1 to 3, see Table 1 described later). The layer configuration of the resulting laminate 60 was as follows: LLDPE / PE / Anchor / PET / Mark / PE / LLDPEF / DL / ALM / PET / Anchor / EMAA / (LLDPE / LLDPE / LLDPE+Silica) In the above, "PE" means polyethylene as an adhesive layer (the same applies below), and "mark" means a printing layer (the same applies below).

[0092] <Dynamic friction coefficient measurement test> The dynamic friction coefficients of the second sealant layers 63 of the three resulting laminates 60 (Samples 1 to 3) were measured. The dynamic friction coefficients were measured in accordance with JIS K 7125:1999, Section 8.2, "Measurement of Films in Contact with Metal or Other Materials." First, 80 mm x 200 mm test pieces were cut out from each laminate 60. A mating material was prepared to contact the cut-out test pieces. The mating material was made of SUS304. Next, the test piece was placed on the mating material with the second sealant layer 63 facing the mating material, and a sliding piece was placed on top of it. Rubber was attached to the bottom of the sliding piece, and the total weight of the sliding piece and rubber was 200 g. The test piece and the sliding piece were then brought into close contact with each other to prevent slippage, and the sliding piece was pulled at a speed of 100 mm / min. The dynamic friction force (N) between the test piece and the mating material was then measured, and the dynamic friction force was divided by the normal force of the sliding piece (1.96 N) to calculate the dynamic friction coefficient. The dynamic friction coefficient was calculated from the average value for the first 30 mm after the start of the relative shear movement between the test piece and the mating material, ignoring the peak of the static friction force.

[0093] The three obtained laminates 60 were used to produce the tube container 10 shown in Fig. 1. In this case, the laminate 60 was first formed into a cylindrical shape to produce the body tube 50. At this time, the laminate 60 was joined by heat sealing using the inner seal member 80 and the outer seal member 81, and then cut into individual body tubes 50. The body tubes 50 were produced at a production speed of 300 tubes / min, and 250 tubes for each sample were produced, for a total of 750 body tubes 50.

[0094] Thereafter, each of these body tubes 50 was wound around a mandrel 82, and the head member 40 was integrally molded with the body tube 50 by compression molding to obtain the tube container 10. The head member 40 was made of high density polyethylene (HDPE).

[0095] In this way, a total of 750 tube containers 10 were produced.

[0096] <Bonding and scratch resistance evaluation> Next, the joints 52 of these tube containers 10 were folded along the longitudinal direction, and it was confirmed whether or not the laminates 60 had peeled apart at the joints 52, thereby evaluating the bondability. In addition, the body tubes 50 were cut and unfolded, and the second sealant layer 63 of the laminates 60 was observed for scratches, thereby evaluating the scratch resistance.

[0097] Example 1-B A laminate 60 and a tube container 10 were produced in the same manner as in Example 1-A, except that a low-density polyethylene film was used as the first sealant layer 61. A dynamic friction coefficient measurement test, bondability evaluation, and scratch resistance evaluation were also performed in the same manner as in Example 1-A. The layer structure of the laminate 60 in Example 1-B is as follows: LDPE / PE / Anchor / PET / Mark / PE / LLDPEF / DL / ALM / PET / Anchor / EMAA / (LLDPE / LLDPE / LLDPE+Silica) In the above, "LDPE" means low-density polyethylene (the same applies hereinafter).

[0098] Example 2-A A laminate 60 and a tube container 10 were produced in the same manner as in Example 1-A, except that the laminate 60 shown in Fig. 4C was produced. In addition, a dynamic friction coefficient measurement test, bondability evaluation, and scratch resistance evaluation were performed in the same manner as in Example 1-A.

[0099] 4C, a resin film having a first resin layer 63a, a second resin layer 63b, and a third resin layer 63c in this order was prepared as the second sealant layer 63 in the same manner as in Example 1-A described above. A linear low-density polyethylene film (thickness: 80 μm) was prepared as the first sealant layer 61. Furthermore, a biaxially oriented polyethylene terephthalate film (thickness: 12 μm) was prepared as the base layer 62. Subsequently, a printed layer 73 was formed on the biaxially oriented polyethylene terephthalate film.

[0100] Next, the first sealant layer 61, the base material layer 62, and the second sealant layer 63 were bonded together by dry lamination to produce a laminate 60. The layer structure of the laminate 60 according to Example 2-A was as follows. LLDPE / DL / PET / Mark / DL / (LLDPE / LLDPE / LLDPE+Silica)

[0101] Example 2-B A laminate 60 and a tube container 10 were produced in the same manner as in Example 2-A, except that a low-density polyethylene film was used as the first sealant layer 61. Furthermore, a dynamic friction coefficient measurement test, bondability evaluation, and scratch resistance evaluation were performed in the same manner as in Example 1-A. The layer structure of the laminate 60 in Example 2-B is as follows: LDPE / DL / PET / Mark / DL / (LLDPE / LLDPE / LLDPE+Silica)

[0102] Example 3-A The second sealant layer 63 is a single layer, and is made of a linear low-density polyethylene film (density 931 kg / m 3 A laminate 60 and a tube container 10 were produced in the same manner as in Example 1-A, except that a 100% polyester resin (100% polyester, MFR 2.1 g / 10 min, thickness 80 μm) was used. A dynamic friction coefficient measurement test, bondability evaluation, and scratch resistance evaluation were also carried out in the same manner as in Example 1-A. The layer structure of the laminate 60 in Example 3-A is as follows: LLDPE / PE / Anchor / PET / Mark / PE / LLDPEF / DL / ALM / PET / Anchor / EMAA / LLDPE

[0103] (Example 3-B) A laminate 60 and a tube container 10 were produced in the same manner as in Example 3-A, except that a low-density polyethylene film was used as the first sealant layer 61. Furthermore, a dynamic friction coefficient measurement test, bondability evaluation, and scratch resistance evaluation were performed in the same manner as in Example 1-A. The layer structure of the laminate 60 in Example 3-B is as follows: LDPE / PE / Anchor / PET / Mark / PE / LLDPEF / DL / ALM / PET / Anchor / EMAA / LLDPE

[0104] Example 4-A The second sealant layer 63 is a single layer, and is made of a linear low-density polyethylene film (density 931 kg / m 3 A laminate 60 and a tube container 10 were produced in the same manner as in Example 2-A, except that a 100% polyester resin (100% polyester, MFR 2.1 g / 10 min, thickness 80 μm) was used. Furthermore, a dynamic friction coefficient measurement test, bondability evaluation, and scratch resistance evaluation were carried out in the same manner as in Example 1-A. The layer structure of the laminate 60 according to Example 4-A is as follows: LLDPE / DL / PET / Mark / DL / LLDPE

[0105] Example 4-B A laminate 60 and a tube container 10 were produced in the same manner as in Example 4-A, except that a low-density polyethylene film was used as the first sealant layer 61. Furthermore, a dynamic friction coefficient measurement test, bondability evaluation, and scratch resistance evaluation were performed in the same manner as in Example 1-A. The layer structure of the laminate 60 in Example 4-B is as follows: LDPE / DL / PET / Printed / DL / LLDPE

[0106] (Comparative example A) As the second sealant layer 63, a linear low-density polyethylene film (density 919 kg / m 3 A laminate and a tube container were produced in the same manner as in Example 1-A, except that a 100% polyester resin (100% polyester, MFR 2.0 g / 10 min, thickness 80 μm) was used. Furthermore, a dynamic friction coefficient measurement test, bondability evaluation, and scratch resistance evaluation were carried out in the same manner as in Example 1-A. The layer structure of the laminate of Comparative Example A is as follows: LLDPE / PE / Anchor / PET / Mark / PE / LLDPEF / DL / ALM / PET / Anchor / EMAA / LLDPE

[0107] (Comparative example B) A laminate and a tube container were produced in the same manner as in Comparative Example A, except that a low-density polyethylene film was used as the first sealant layer 61. Furthermore, a dynamic friction coefficient measurement test, bondability evaluation, and scratch resistance evaluation were performed in the same manner as in Example 1-A. The layer structure of the laminate in Comparative Example B is as follows: LDPE / PE / Anchor / PET / Mark / PE / LLDPEF / DL / ALM / PET / Anchor / EMAA / LLDPE

[0108] (Comparative example C) A laminate and a tube container were produced in the same manner as in Comparative Example A, except that a medium-density polyethylene film was used as the first sealant layer 61. Furthermore, a dynamic friction coefficient measurement test, bondability evaluation, and scratch resistance evaluation were performed in the same manner as in Example 1-A. The layer structure of the laminate in Comparative Example B is as follows: MDPE / PE / Anchor / PET / Mark / PE / LLDPEF / DL / ALM / PET / Anchor / EMAA / LLDPE

[0109] The results are shown in Tables 1 and 2.

[0110] [Table 1]

[0111] [Table 2]

[0112] In Table 2, a circle in the "Bondability Evaluation" column indicates that the laminates did not peel off from each other at the joints of all tube containers. In Table 2, a cross in the "Scratch Resistance Evaluation" column indicates that scratches occurred on the second sealant layer in at least one tube container. In addition, a circle in the "Scratch Resistance Evaluation" column indicates that scratches did not occur on the second sealant layer 63 in all tube containers 10.

[0113] As a result, in the tube containers of Comparative Examples A to C, the average dynamic friction coefficient of the second sealant layer was 0.23, as shown in Table 1, and scratches were generated on the second sealant layer, as shown in Table 2. On the other hand, in the tube containers 10 of Examples 1-A to 2-B, the average dynamic friction coefficient of the second sealant layer 63 was 0.16, as shown in Table 1, and scratches were not generated on the second sealant layer 63, as shown in Table 2. Furthermore, in the tube containers 10 of Examples 3-A to 4-B, the average dynamic friction coefficient of the second sealant layer 63 was 0.17, as shown in Table 1, and scratches were not generated on the second sealant layer 63, as shown in Table 2.

[0114] As described above, in the tube containers 10 according to Examples 1-A to 4-B, by setting the dynamic friction coefficient of the second sealant layer 63 within a predetermined range, it was possible to improve the sliding property of the laminate 60 relative to the inner seal member 80 and to prevent scratches from occurring on the second sealant layer 63. This makes it possible to prevent foreign matter caused by scratches occurring on the second sealant layer 63 from adhering to the inner seal member 80, and to prevent a decrease in the bonding strength between the first sealant layer 61 and the second sealant layer 63.

[0115] Furthermore, even when the slipperiness of the laminate 60 relative to the inner seal member 80 was improved, the tube containers 10 according to Examples 1-A to 4-B were able to maintain good adhesion between the first sealant layer 61 and the second sealant layer 63, as shown in Table 2.

[0116] It is also possible to combine the multiple components disclosed in the above embodiments as needed, or to delete some of the components disclosed in the above embodiments. [Explanation of symbols]

[0117] 10 tube containers 10A Tube with Cap 20 caps 40 Head member 50 Body tube 51 one end 60 laminate 61 First sealant layer 62 Base material layer 63 Second sealant layer 63a 1st resin layer 63b 2nd resin layer 63c 3rd resin layer 64 Middle Class 65 Barrier Layer

Claims

1. A laminate comprising a first sealant layer, a base layer, and a second sealant layer in this order, the second sealant layer has a dynamic friction coefficient against metal of 0.10 or more and 0.20 or less; The laminate, wherein the second sealant layer is a single layer and includes a low-density polyethylene and a linear low-density polyethylene having a density of 931 kg / m 3 or more and 945 kg / m 3 or less.

2. The laminate of claim 1 , wherein the first sealant layer comprises low density polyethylene and linear low density polyethylene.

3. The laminate according to claim 1 or 2, further comprising: an intermediate layer provided between the substrate layer and the second sealant layer; and a barrier layer provided between the substrate layer and the intermediate layer.

4. The laminate according to claim 1 or 2, further comprising: an intermediate layer provided between the base material layer and the second sealant layer; and a barrier layer provided between the intermediate layer and the second sealant layer.

5. In a tube container, a body tube formed by overlapping and joining opposing edge portions of the laminate according to any one of claims 1 to 4; a head member joined to one end of the body tube.

6. In a tube container with a cap, The tube container according to claim 5 ; a cap attached to the head member.

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