JP7772123B2 - Laminate, tube container, and tube container with cap - Google Patents

Description

The present disclosure relates to a laminate, a tube container, and a tube container with a cap.

Laminated tube containers are a commonly known type of tube container. Generally, laminated tube containers consist of a body tube (laminated tube) and a head member that includes a mouth. The manufacturing process for laminated tube containers consists of a process of forming a body tube made of laminated layers into a cylinder, and a process of molding a head member onto the body tube.

In the process of forming a cylindrical body tube made of laminated 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, for example, using a heat-sealing sealing member to produce the body tube (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2000-281094

However, in conventional tube containers, the innermost resin layer surface may have insufficient slipperiness, which can lead to scratches on the innermost resin layer surface when the body tube is being formed into a tube. If scratches occur on the innermost resin layer surface, foreign matter caused by the scratches may adhere to the sealing member, reducing the bondability of the laminate. Furthermore, if the innermost resin layer surface has insufficient slipperiness, the conveyability of the laminate may be reduced, and it may be impossible to form the body tube into a tube. In particular, when the process of forming the body tube into a tube is carried out at high speed, there is a high possibility that scratches will occur on the innermost resin layer surface and that the body tube may not be formed into a tube.

This 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 can improve slipperiness.

The laminate according to one embodiment comprises a first sealant layer, a base layer, and a second sealant layer, in this order, and the second sealant layer has a dynamic friction coefficient with respect to metal of 0.10 or more and 0.20 or less.

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.

In one embodiment of the laminate, the third resin layer may further contain silicon dioxide.

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

In one embodiment of the laminate, the density of the second resin layer may be higher than the densities of the first resin layer and the third resin layer.

In one embodiment of the laminate, the first sealant layer may include linear low-density polyethylene.

In one embodiment, the laminate may further include an intermediate layer disposed between the base layer and the second sealant layer, and a barrier layer disposed between the base layer and the intermediate layer.

A tube container according to one embodiment comprises 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.

A capped tube container according to one embodiment is a capped tube container comprising a tube container according to the present disclosure and a cap attached to the head member.

This disclosure makes it possible to improve the slipperiness of the laminate.

FIG. 1 is a side view showing a tube container with a cap according to this embodiment, in which the cap is in a closed state. FIG. 2 is a side view showing the capped tube container according to this embodiment, with the cap in an open state. FIG. 3 is a partial vertical cross-sectional view showing a tube container with a cap according to this embodiment. 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 this embodiment. 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. 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. 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 this embodiment. 5(a) to 5(d) are schematic diagrams showing a method for manufacturing a tube container according to this embodiment. 6(a) and 6(b) are schematic diagrams showing a method for manufacturing a tube container according to this embodiment.

One embodiment will now be described with reference to the drawings. Figures 1 to 6 illustrate one embodiment. The figures shown below are schematic. Therefore, the size and shape of each part have been appropriately exaggerated to facilitate understanding. Appropriate modifications can be made without departing from the technical concept. In the figures shown below, 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 intended to be limiting. 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 encompass substantially the same state. Figures 1 to 6 show an empty, unbottom-sealed capped tube container 10A after filling with contents.

As shown in Figures 1 to 3, the capped tube container 10A according to this embodiment comprises a tube container 10 and a cap 20 attached to the tube container 10.

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.

Here, we will first explain the head member 40 of the tube container 10.

As shown in Figure 3, the head member 40 has a mouth portion 11 and a shoulder portion 12 located below the mouth portion 11.

The mouth portion 11 includes a threaded portion 14 onto which the inner tube portion 28 of the cap 20, described below, is threaded. The shape of the mouth portion 11 may be any conventional shape.

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.

Such a head member 40 is molded, for example, by compression molding, as described below. The head member 40 is also made from a resin material such as high-density polyethylene (HDPE).

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 layer 60 (see Figures 4A to 4D), which is rolled into a cylindrical shape, with opposing edges overlapping and joined together by, for example, heat sealing. As a result, the body tube 50 has a joint 52 (see Figures 1 and 2) along its longitudinal direction, where the layers 60 are joined together.

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 body 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 that 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.

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 substrate 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. Furthermore, the second sealant layer 63 includes, from the substrate 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, this is not limited to this, and the second sealant layer 63 may be a single layer, as shown in Figure 4B.

As shown in FIG. 4C , the laminate 60 includes, in this order, a first sealant layer 61, a first adhesive layer 71a, a base layer 62, a printing layer 73, a second adhesive layer 71b, 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. In other words, the second sealant layer 63 is multi-layered. However, this is not limiting, and the second sealant layer 63 may be a single layer, as shown in FIG. 4D .

Each layer of the laminate 60 is described below.

First Sealant Layer The first sealant layer 61 is a layer for bonding the laminate 60 together. The material constituting the first sealant layer 61 may be any material that melts and fuses when heated. For example, a polyolefin film may be used for the first sealant layer 61. More specifically, the first sealant layer 61 may be, for example, 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 another unsaturated carboxylic acid, a polyvinyl acetate resin film, a polyester resin film, a polystyrene resin film, or a film made of one or more of other resins such as polyacrylonitrile, saturated polyester, or polyvinyl alcohol.

Here, low-density polyethylene is polyethylene having a density of 910 kg/ ^m3 or more and 930 kg/ ^m3 or less. Furthermore, medium-density polyethylene is polyethylene having a density of 930 kg/ ^m3 or more and 942 kg/ ^m3 or less. Furthermore, high-density polyethylene is polyethylene having a density of 942 kg/ ^m3 or more. Low-density polyethylene is obtained by polymerizing ethylene at a high pressure, for example, of 1000 atmospheres or more and less than 2000 atmospheres. Medium-density polyethylene and high-density polyethylene are obtained by polymerizing ethylene at a medium or low pressure, for example, of 1 atmosphere or more and less than 1000 atmospheres.

The medium-density polyethylene and high-density polyethylene may partially contain a copolymer of ethylene and an α-olefin. Even when ethylene is polymerized under medium or low pressure, medium- 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 under medium or low pressure to introduce short-chain branches. Examples of α-olefins include 1-butene (C ₄ ), 1-hexene (C ₆ ), 4-methylpentene (C ₆ ), and 1-octene (C ₈ ). The density of linear low-density polyethylene is, for example, 915 kg/m ³ or more and 945 kg/m ³ or less.

The first sealant layer 61 preferably contains linear low-density polyethylene. By including linear low-density polyethylene in the first sealant layer 61, 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.

In this embodiment, the heat-sealable film may be prepared, for example, by preparing a resin composition containing one or more of the above resins as the main component, optionally adding desired additives, and then molding the resin composition into a film or sheet using, for example, the T-die method, inflation method, or other molding method.

The material for the first sealant layer 61 may optionally contain additives such as antiblocking agents, lubricants (fatty acid amides, etc.), flame retardants, and inorganic or organic fillers.

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

Substrate Layer and Intermediate Layer The substrate 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 substrate layer 62 and intermediate layer 64 include films or sheets of polyester resins, polyamide resins, polyaramid resins, polyolefin resins, polycarbonate resins, polyacetal resins, fluorine-containing resins, and other tough resins. As an example, the substrate 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.

Furthermore, the resin films or sheets described above can be either unstretched films or uniaxially or biaxially stretched films. Among these, biaxially stretched polyester resin films are preferred in this embodiment due to their excellent printability.

In this embodiment, it is preferable that the thickness of the base layer 62 and the intermediate layer 64 each be 10 μm or more and 25 μm or less.

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 can be, for example, the same material as that of the first sealant layer 61 described above.

In 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. Because 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 wrapped around the outer surface of the inner seal member 80, as described below. This improves the handleability of the laminate 60 when rolling the laminate 60 and joining the opposing edges by heat sealing. Furthermore, because 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 can be improved. This prevents scratches from occurring on the second sealant layer 63 when wrapping the laminate 60 around the inner seal member 80, as described below. Furthermore, because 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 the 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.

(Dynamic friction coefficient measurement test)
The dynamic friction coefficient is measured according to a method in accordance with 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 up to 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 directly connected to the sliding piece.

As shown in Figures 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.

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 acts 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 manufactured 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 silicon dioxide content in the third resin layer 63c is preferably 0.5% by weight or more and 50% by weight or less. By having the silicon dioxide content in the third resin layer 63c be 0.5% by weight or more, the slipperiness of the second sealant layer 63 can be more effectively improved and the first sealant layer 61 and the second sealant layer 63 can be more effectively prevented from adhering to each other. Furthermore, by having the silicon dioxide content in the third resin layer 63c be 50% by weight or less, a decrease in the bond between the first sealant layer 61 and the second sealant layer 63 can be prevented and the slipperiness can be improved.

On the other hand, as shown in Figures 4B and 4D, when the second sealant layer 63 is a single layer, it is preferable that the second sealant layer 63 contain linear low-density polyethylene. In this way, 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 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, because the rigidity of the second sealant layer 63 can be increased, the scratch resistance of the second sealant layer 63 can be improved.

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

Barrier Layer The barrier layer 65 is a layer for suppressing the transmission 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.

Furthermore, when a metal vapor deposition layer such as aluminum is used as the barrier layer 65, a vapor deposition thin film of 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 deposition.

When a metal vapor-deposited aluminum layer is used as the barrier layer 65, the thickness of the barrier layer 65 is generally preferably approximately 50 Å to 3000 Å, and particularly preferably approximately 100 Å to 2000 Å. Furthermore, the surface of the intermediate layer 64 that supports the above-mentioned 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.

The barrier layer 65 may also be a transparent vapor deposition layer that can be formed by a conventionally known method. In this case, the barrier layer 65 may be a transparent vapor deposition layer made of a vapor deposition layer of an inorganic oxide.

The transparent vapor-deposited layer can be, for example, a vapor-deposited layer of an oxide such as silicon (Si), aluminum (Al), magnesium (Mg), calcium (Ca), potassium (K), tin (Sn), sodium (Na), boron (B), titanium (Ti), lead (Pb), zirconium (Zr), or yttrium (Y). For tube containers, it is particularly preferable to have a vapor-deposited layer of aluminum oxide or silicon oxide.

Inorganic oxides are expressed as _MOx (where M represents an inorganic element, and the value of X varies depending on the inorganic element), such as _SiOx , _AlOx, etc. The range of X is as follows: silicon (Si) is 0 to 2, aluminum (Al) is 0 to 1.5, magnesium (Mg) is 0 to 1, calcium (Ca) is 0 to 1, potassium (K) is 0 to 0.5, tin (Sn) is 0 to 2, sodium (Na) is 0 to 0.5, boron (B) is 0 to 1.5, titanium (Ti) is 0 to 2, lead (Pb) is 0 to 2, zirconium (Zr) is 0 to 2, and yttrium (Y) is 0 to 1.5. In the above, when X = 0, the material is a completely inorganic element (pure substance) and is not transparent, and the upper limit of the range of X is the value when the material 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.

The thickness of the transparent vapor deposition layer varies depending on the type of inorganic oxide used, but it is desirable to select any thickness within the range of, for example, 50 Å to 2000 Å, preferably 100 Å to 1000 Å. For example, in the case of a vapor deposition layer of aluminum oxide or silicon oxide, the thickness is desirable to be 50 Å to 500 Å, more preferably 100 Å to 300 Å.

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

The 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. The adhesive layers can be appropriately selected depending on the resins that make up the layers to be bonded.

For the adhesive layer, any of the following can be used: anchor coating agents such as isocyanate (urethane), polyethyleneimine, polybutadiene, and organic titanium; or polyurethane, polyacrylic, polyester, epoxy, polyvinyl acetate, cellulose, and other laminating adhesives.

In addition, suitable adhesive layers include polyethylene, polypropylene, linear low-density polyethylene, ethylene-vinyl alcohol, ethylene-methacrylic acid copolymer (EMAA), ethylene-acrylic acid copolymer, ionomer, and maleic anhydride-modified polyolefin resin.

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

Methods for laminating the first sealant layer 61, substrate layer 62, intermediate layer 64, second sealant layer 63, etc. to one another include, for example, wet lamination, dry lamination, solventless dry lamination, extrusion lamination, T-die coextrusion molding, coextrusion lamination, inflation, and any other method. Furthermore, when performing the above-mentioned lamination, if necessary, the film can be subjected to pretreatment such as corona treatment or ozone treatment.

Anchor Coat Layers 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.

Printed Layer The printed layer 73 is a layer on which a pattern or the like is printed, and is a layer for improving the design of the laminate 60. The printed layer 73 can be an ink composition obtained by adjusting the ink composition by adding one or more of ordinary ink vehicles as the main component, if necessary, optionally adding 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.

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 to 200 μm, for example.

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 formed by compression molding, as described below. However, this is not limited to this, and the body tube 50 and the head member 40 may also be joined by injection molding.

Next, we will explain the cap 20.

As shown in Figures 1 to 3, the cap 20 has a head 21 and a cover 22 connected to the head 21. The head 21 and cover 22 are connected to each other via a pair of connectors 23 with hinges 25 provided in the center. This allows the cover 22 to freely rotate relative to the head 21 around the hinges 25 of the connectors 23, and functions as a lid that covers the top surface of the head 21. The head 21, cover 22, and pair of connectors 23 are integrally formed from injected resin, as described below.

As shown in FIG. 3 , the head 21 includes an inner tube 28 that is attached to the tube container 10, an outer tube 27 located radially outward of the inner tube 28, and an upper plate 29 that is located above the inner and outer tubes 28 and has 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 injected resin. The upper plate 29 is flat and has a generally circular shape in plan view. A downward-protruding annular undercut 29a is provided in 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. The spout 26 may alternatively be located in the approximate center of the upper plate 29.

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 downward-protruding annular undercut 35, which ensures a more complete fit with the mating 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 on the upper surface of the top plate 29 of the head 21, ensuring that the cover 22 is securely fastened to 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 around the hinge 25 of the lid plate 32 as the rotation axis.

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 the product created by filling the tube container 10 with its contents can stand upright (stand upright when head down) and can be placed upside down when on display in a store or when not in use at the intended location. 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 more than the rest of the body. This makes it easier for fingers to grip the protruding piece 39.

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

First, as shown in FIG. 5(a), a laminate 60 is prepared. In this case, for example, a laminate 60 is produced that includes, in this order, a first sealant layer 61, a first adhesive layer 71a, a first anchor coat layer 72a, a substrate 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.

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. In this process, as shown in Figures 5(b)-(c), the laminate 60 is first wrapped around the outer surface of the 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 relative to the material (metal) of the inner seal member 80 is 0.10 or greater and 0.20 or less. Having a dynamic friction coefficient of the second sealant layer 63 relative to the material of the inner seal member 80 of 0.10 or greater facilitates wrapping the laminate 60 around the outer surface of the cylindrical inner seal member 80. This improves the handleability of the laminate 60 when the laminate 60 is rolled and the opposing edges are heat-sealed. Furthermore, since the dynamic friction coefficient of the second sealant layer 63 relative 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, preventing scratches on the second sealant layer 63 of the laminate 60. 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 transported downstream (to the left in Figures 5(b)-(c)) by guide rolls (not shown).

Next, as shown in Figure 5(c), an outer sealing member 81 is pressed against the overlapping portion of the opposing edges of the laminate 60, sandwiching the overlapping portion of the opposing edges of the laminate 60 between the inner sealing member 80 and the outer sealing member 81. Next, the overlapping portion of the opposing edges of the laminate 60 is joined by heat sealing.

Then, the joined laminate 60 is cut into individual body tubes 50. In this way, body tubes 50 are produced as shown in Figure 5(d). In this case, the speed at which body tubes 50 are produced may be approximately 300 tubes/min.

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

First, as shown in Figure 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 pre-formed into a cylindrical shape, is wound around the mandrel 82, whose tip serves as the core for compression molding the head member 40, and then inserted to a predetermined position into the cavity of the mold 83 that will mold the head member 40.

Next, molten resin is supplied into the mold 83 from a resin supply device (not shown), thereby compression-molding the head member 40. In this case, one end 51 of the body tube 50 is inserted into the mold 83, and the head member 40 is molded while the body tube 50 is fused integrally to the head member 40. The integrated head member 40 and body tube 50 are then removed from the mold 83 and mandrel 82, yielding the tube container 10 (see Figure 6(b)).

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, for example, using 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 Figure 1.

Then, 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 to obtain the capped tube container 10A filled with the contents as a product.

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 wrapping the laminate 60 around the outer surface of the inner seal member 80. This improves the handleability of the laminate 60 when rolling the laminate 60 and joining the opposing edges 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, the slipperiness of the laminate 60 relative to the inner seal member 80 can be improved, preventing problems such as the inability to form the body tube 50 into a tube even when the process of forming the body tube 50 into a tube is performed at high speed.

In addition, according to this embodiment, the second sealant layer 63 has, 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 can easily improve the slipperiness of the second sealant layer 63.

Furthermore, according to this embodiment, the third resin layer 63c further contains silicon dioxide. This improves the slipperiness of the second sealant layer 63, even when the third resin layer 63c contains linear low-density polyethylene. Furthermore, even when the manufactured 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.

In addition, 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. As a result, the rigidity of the second sealant layer 63 can be increased, and the slipperiness of the second sealant layer 63 can be easily improved. Furthermore, because the rigidity of the second sealant layer 63 can be increased, the scratch resistance of the second sealant layer 63 can be improved.

Furthermore, according to this embodiment, the first sealant layer 61 contains linear low-density polyethylene. This improves the bonding strength between the first sealant layer 61 and the second sealant layer 63 when they are bonded to each other.

In addition, according to this embodiment, the laminate 60 further includes an intermediate layer 64 provided between the base 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 improves the barrier properties of the laminate 60.

Next, we will explain specific examples of the above embodiment.

(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 was as follows:
LLDPEF/DL/ALM/PET
In the above, "LLDPE" means linear low-density polyethylene (hereinafter the same). Also, "DL" means an adhesive layer formed by the dry lamination method using a two-component curing urethane adhesive (main component: polyester resin, curing agent: aliphatic polyisocyanate, dry mass 3.5 g/ ^m2 ) (hereinafter the same). Also, "ALM" means an aluminum vapor deposition layer (hereinafter the same). Furthermore, "PET" means biaxially oriented polyethylene terephthalate (hereinafter the same).

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® 2021I, manufactured by Prime Polymer Co., Ltd.) was prepared as the resin for the first resin layer 63a. Furthermore, linear low-density polyethylene (UltZex® 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® 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 below).

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).

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. Next, a printing layer 73 was formed on the biaxially oriented polyethylene terephthalate film.

Next, a laminate 60 was fabricated by laminating the first sealant layer 61, the base layer 62, and the second intermediate described above using a sand lamination method. 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 printed layer 73 as an adhesive layer, and the second intermediate was laminated onto the adhesive layer using a sand lamination method. Each adhesive layer had a thickness of 25 μm. In this manner, three laminates 60 shown in FIG. 4A were fabricated (Samples 1 to 3, see Table 1 below). The layer structure 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 (same below), and "mark" means a printed layer (same below).

<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 also 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 counter material was 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 determined from the average value for the first 30 mm after the start of the relative shear movement between the test piece and the counter material, ignoring the peak of the static friction force.

The three resulting laminates 60 were then used to produce the tube container 10 shown in Figure 1. First, the laminate 60 was formed into a cylindrical shape to produce the body tube 50. The laminate 60 was then heat-sealed with the inner and outer sealing members 80 and 81, and then cut into individual body tubes 50. The body tubes 50 were produced at a production speed of 300 tubes/min, with 250 tubes per sample, for a total of 750 body tubes 50.

Then, each of these body tubes 50 was wrapped around a mandrel 82, and the head member 40 was integrally molded onto the body tube 50 using compression molding, thereby obtaining the tube container 10. The head member 40 was made of high-density polyethylene (HDPE).

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

<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.

(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).

(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.

When producing the laminate 60 shown in Figure 4C, first, 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. Next, a printed layer 73 was formed on the biaxially oriented polyethylene terephthalate film.

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)

(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)

(Example 3-A)
A laminate 60 and a tube container 10 were produced in the same manner as in Example 1-A, except that the second sealant layer 63 was a single layer and a linear low-density polyethylene film (density 931 kg/m ³ , MFR 2.1 g/10 min, thickness 80 μm) was used as the second sealant layer 63. Also, 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 of Example 3-A is as follows.
LLDPE/PE/Anchor/PET/Mark/PE/LLDPEF/DL/ALM/PET/Anchor/EMAA/LLDPE

(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

(Example 4-A)
A laminate 60 and a tube container 10 were produced in the same manner as in Example 2-A, except that the second sealant layer 63 was a single layer and a linear low-density polyethylene film (density 931 kg/m ³ , MFR 2.1 g/10 min, thickness 80 μm) was used as the second sealant layer 63. Also, 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 of Example 4-A is as follows.
LLDPE/DL/PET/Mark/DL/LLDPE

(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/Mark/DL/LLDPE

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

(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

(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

The above results are shown in Tables 1 and 2.

In Table 2 above, an "O" in the "Bondability Evaluation" column means that there was no peeling between the laminates at the joints of all tube containers. Also, in Table 2 above, an "X" in the "Scratch Resistance Evaluation" column means that scratches occurred on the second sealant layer in at least one tube container. Also, an "O" in the "Scratch Resistance Evaluation" column means that there were no scratches on the second sealant layer 63 in all tube containers 10.

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 occurred 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 no scratches occurred 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 no scratches occurred on the second sealant layer 63, as shown in Table 2.

In this way, by setting the dynamic friction coefficient of the second sealant layer 63 within a predetermined range, the tube containers 10 according to Examples 1-A to 4-B were able to improve the sliding properties of the laminate 60 relative to the inner seal member 80 and prevent scratches from occurring on the second sealant layer 63. This prevents foreign matter caused by scratches on the second sealant layer 63 from adhering to the inner seal member 80, and prevents a decrease in the bond between the first sealant layer 61 and the second sealant layer 63.

Furthermore, as shown in Table 2, 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, even when the slipperiness of the laminate 60 relative to the inner seal member 80 was improved.

The multiple components disclosed in the above embodiments can be combined as needed. Alternatively, some components may be omitted from all of the components shown in the above embodiments.

10 Tube container 10A Capped tube container 20 Cap 40 Head member 50 Body tube 51 One end 60 Laminate 61 First sealant layer 62 Base material layer 63 Second sealant layer 63a First resin layer 63b Second resin layer 63c Third resin layer 64 Intermediate layer 65 Barrier layer

Claims (6)

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 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 . The laminate of claim 1, wherein the first sealant layer comprises low-density polyethylene and linear low-density polyethylene. The laminate described in claim 1 or 2, further comprising an intermediate layer disposed between the base layer and the second sealant layer, and a barrier layer disposed between the base layer and the intermediate layer. The laminate described in claim 1 or 2, further comprising an intermediate layer disposed between the base layer and the second sealant layer, and a barrier layer disposed between the intermediate layer and the second sealant layer. 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. In a tube container with a cap,
The tube container according to claim 5 ;
a cap attached to the head member.