JP7707672B2 - Packaging material for tube containers, tube containers and tube containers with caps - Google Patents

Description

This disclosure relates to packaging materials for tube containers, tube containers, and tube containers with caps.

Tube containers with a body tube are known (for example, see Patent Document 1). Patent Document 1 discloses a tube container in which the body comprises a base layer that contains the contents, a transparent or semi-transparent protective layer that covers the outer surface of the base layer, and an intermediate body that is interposed between the protective layer and the base layer and decorates all or part of the body, and the exterior of the body is provided with uneven portions that correspond to the thickness of the intermediate body.

Packaging materials that can be used for tube containers are also known (for example, see Patent Document 2). Patent Document 2 discloses a packaging material that has high water repellency and can sustainably exhibit excellent non-adhesive properties while maintaining good thermal adhesion.

However, there is a demand for improved design of tube containers. There is also a demand for tube containers that make it easy to remove the contents when there is only a small amount left.

Patent No. 4063730 Patent No. 5793936

This disclosure has been made in consideration of these points, and aims to provide a packaging material for tube containers, a tube container, and a tube container with a cap that improves design and allows the contents to be easily removed.

The packaging material for tube containers according to one embodiment includes a first sealant layer, a base layer, and a second sealant layer arranged in this order from the first surface to the second surface, and has a plurality of first ridgelines that are convex toward the first surface side and a plurality of second ridgelines that are convex toward the second surface side, and in a cross section along the normal direction of a first plane including the plurality of first ridgelines, the height on the first surface from the second ridgeline to the first ridgeline adjacent to the second ridgeline is 0.1 mm or more and 0.5 mm or less, and in a cross section along the normal direction of a second plane including the plurality of second ridgelines, the height on the second surface from the second ridgeline to the first ridgeline adjacent to the second ridgeline is 0.1 mm or more and 0.5 mm or less.

In one embodiment of the tube container packaging material, the first ridge may include a plurality of first curved lines extending radially from a predetermined point so as to be convex toward one side in a predetermined direction in a plan view, and a plurality of second curved lines extending radially from the predetermined point so as to be convex toward the other side in the predetermined direction in a plan view.

In one embodiment of the tube container packaging material, each of the second ridge lines may be formed on a virtual line that extends radially from the predetermined point in a plan view and passes through an intersection of the first curve and the second curve.

In one embodiment of the tube container packaging material, the first sealant layer may include an extrusion laminate layer or an inflation molding layer.

In one embodiment, the packaging material for tube containers may further include a printing layer provided on the base layer.

In one embodiment of the packaging material for tube containers, the first ridge line may correspond to the pattern displayed by the printing layer.

The packaging material for tube containers according to one embodiment further includes a barrier layer provided between the base layer and the second sealant layer, and the barrier layer may be aluminum foil.

In one embodiment, the packaging material for tube containers may further include a protective layer that constitutes the first surface and protects the first sealant layer.

In one embodiment of the packaging material for tube containers, at least one of the first sealant layer, the base layer, and the second sealant layer may contain a biomass-derived component.

In one embodiment of the packaging material for tube containers, the base layer may include paper.

In one embodiment, 90% or more by weight of the packaging material for tube containers may be made of the same material.

The tube container according to one embodiment is a tube container comprising a body tube having a joint where opposing ends of the tube container packaging material according to one embodiment are overlapped and joined to each other, and a head member joined to one end of the body tube.

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

According to the present disclosure, the design of the tube container is improved and the contents can be easily removed.

FIG. 1 is a partial vertical sectional view showing a tube container with a cap according to this embodiment filled with contents. FIG. 2A is a cross-sectional view showing an example of a layer structure of the laminate according to the present embodiment. FIG. 2B is a cross-sectional view showing an example of a layer structure of the laminate according to the present embodiment. FIG. 2C is a cross-sectional view showing an example of a layer structure of the laminate according to the present embodiment. FIG. 2D is a cross-sectional view showing an example of a layer structure of the laminate according to the present embodiment. FIG. 2E is a cross-sectional view showing an example of a layer structure of the laminate according to the present embodiment. FIG. 2F is a cross-sectional view showing an example of a layer structure of the laminate according to the present embodiment. FIG. 3 is a plan view showing the laminate according to the present embodiment. FIG. 4 is a cross-sectional view (cross-sectional view taken along line IV-IV in FIG. 3) showing the laminate according to the present embodiment. FIG. 5 is a schematic diagram showing a method for manufacturing a tube container according to this embodiment. 6(a) and (b) are schematic diagrams showing a method for manufacturing a tube container according to this embodiment. FIG. 7 is a perspective view showing a method for manufacturing a tube container according to this embodiment. FIG. 8 is a partial vertical sectional view showing a method for manufacturing a capped tube container according to this embodiment.

An embodiment will be described below with reference to the drawings. Figures 1 to 8 are diagrams showing an embodiment. Each of the figures shown below is a schematic diagram. Therefore, the size and shape of each part are appropriately exaggerated to facilitate understanding. In addition, appropriate modifications can be made without departing from the technical concept. In each of the figures shown below, the same parts are given the same reference numerals, and some detailed explanations may be omitted. In addition, the numerical values such as dimensions of each member and the material names described in this specification are examples of an embodiment, and are not limited to these, and can be selected and used as appropriate. In this specification, terms that specify shapes or geometric conditions, such as parallel, orthogonal, and vertical, are interpreted to include substantially the same state in addition to their strict meaning.

In this embodiment, the "X direction" is a direction perpendicular to the longitudinal direction of the body tube of the tube container. This X direction is a direction parallel to the horizontal direction when a product made by filling a tube container with contents is placed upside down (with the cap down) during display at a store. The X direction is also a direction (width direction) perpendicular to the flow direction (flow direction) of the film constituting the laminate when making a laminate described later, and is the so-called TD (Transverse Direction). The "Y direction" is a direction perpendicular to the X direction and parallel to the longitudinal direction of the body tube of the tube container. This Y direction is a direction parallel to the up-down direction when a product is placed upside down. The Y direction is also a direction (flow direction) of the film constituting the laminate when making a laminate described later, and is the so-called MD (Machine Direction). The "Z direction" is a direction perpendicular to both the X direction and the Y direction and parallel to the thickness direction of the laminate.

First, referring to FIG. 1, we will explain a capped tube container 10A produced using a laminate (packaging material for tube containers) 50 according to this embodiment.

As shown in FIG. 1, the capped tube container 10A of this embodiment includes a tube container 10 and a cap 20 attached to a head member 40 of the tube container 10, which will be described later.

The tube container 10 includes a body tube 30, which is a laminated molded tube, and a head member 40 joined to one end 31 of the body tube 30.

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

As shown in FIG. 1, the head member 40 has a shoulder portion 41 and a mouth portion 42. The cap 20 is attached to the mouth portion 42.

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

Next, the body tube 30 of the tube container 10 will be described. The body tube 30 has a cylindrical shape with one end sealed, as shown in FIG. 1. This body tube 30 is composed of a laminated laminate 50 (see FIGS. 2A to 2F). The body tube 30 also has a body seal portion (joint portion) 32 in which opposing ends 35 (see FIG. 7) of the laminate 50 are overlapped and joined to each other. This body seal portion 32 is formed along the longitudinal direction (Y direction) of the body tube 30. Such a body tube 30 is a member obtained by rolling the laminate 50 into a cylindrical shape, overlapping the opposing ends 35, and joining them to each other, for example, by heat sealing.

The body tube 30 also has a bottom seal 34 that joins the laminates 50 together. This bottom seal 34 is a portion where the laminates 50 near the opening 50B (see FIG. 8) formed at the other end 33 of the body tube 30 are joined together after an appropriate amount of content C is filled through the opening 50B. The content C may be, for example, an alcohol-containing cleansing agent, sunscreen, toothpaste, treatment, body cream, or hair styling product (so-called hair wax).

Next, the layer structure of the laminate 50 will be described. Figures 2A to 2F show an example of the layer structure of the laminate 50 constituting the body tube 30. As shown in Figures 2A to 2F, the laminate 50 includes a first sealant layer 51, a base layer 52, and a second sealant layer 53, which are arranged in this order from the outer surface (first surface) 501 to the inner surface (second surface) 502. Of these, at least one of the first sealant layer 51, the base layer 52, and the second sealant layer 53 may contain a biomass-derived component, as described below.

2A, 2C, 2D, and 2F, the laminate 50 may further include a printed layer 54 provided on the base layer 52. As shown in FIGS. 2A to 2F, the laminate 50 may further include a barrier layer 55 provided between the base layer 52 and the second sealant layer 53. As shown in FIGS. 2A to 2C, and 2E, the laminate 50 may further include a protective layer 59 that constitutes the outer surface 501 and protects the first sealant layer 51.

2A, the laminate 50 includes, in order from the outer surface 501 to the inner surface 502, a protective layer 59, a first printed layer 54a, a first sealant layer 51, a first anchor coat layer 56a, a base layer 52, a second printed layer 54b (printed layer 54), a second anchor coat layer 56b, a first adhesive layer 57a, an intermediate layer 58, a second adhesive layer 57b, a barrier layer 55, a third adhesive layer 57c, and a second sealant layer 53. Of these, the first sealant layer 51 includes a first resin layer 51a, a second resin layer 51b, and a third resin layer 51c, which are arranged in order from the outer surface 501 to the inner surface 502. In the example shown in FIG. 2A, the protective layer 59 constitutes the outer surface of the body tube 30. The second sealant layer 53 constitutes the inner surface of the body tube 30.

2B, the laminate 50 includes, in order from the outer surface 501 to the inner surface 502, a protective layer 59, a first printed layer 54a, a first sealant layer 51, a first anchor coat layer 56a, a base layer 52, a first adhesive layer 57a, a first barrier layer 55a (barrier layer 55), a first intermediate layer 58a, a second anchor coat layer 56b, a second adhesive layer 57b, a second intermediate layer 58b, a third anchor coat layer 56c, a third adhesive layer 57c, a second barrier layer 55b (barrier layer 55), a fourth adhesive layer 57d, and a second sealant layer 53. Of these, the first sealant layer 51 includes a first resin layer 51a and a second resin layer 51b arranged in order from the outer surface 501 to the inner surface 502. The second sealant layer 53 has a first resin layer 53a and a second resin layer 53b arranged in this order from the inner surface 502 to the outer surface 501. In the example shown in FIG. 2B, the protective layer 59 forms the outer surface of the body tube 30. The first resin layer 53a of the second sealant layer 53 forms the inner surface of the body tube 30.

2C, the laminate 50 includes, in order from the outer surface 501 to the inner surface 502, a protective layer 59, a first sealant layer 51, a first anchor coat layer 56a, a base layer 52, a printed layer 54, a first adhesive layer 57a, a first barrier layer 55a (barrier layer 55), a first intermediate layer 58a, a second adhesive layer 57b, a second intermediate layer 58b, a second anchor coat layer 56b, a third adhesive layer 57c, a second barrier layer 55b (barrier layer 55), a fourth adhesive layer 57d, and a second sealant layer 53. Of these, the first sealant layer 51 includes a first resin layer 51a, a second resin layer 51b, and a third resin layer 51c arranged in order from the outer surface 501 to the inner surface 502. In the example shown in FIG. 2C, the protective layer 59 forms the outer surface of the body tube 30. The second sealant layer 53 forms the inner surface of the body tube 30.

2D, the laminate 50 includes, in this order from the outer surface 501 to the inner surface 502, a first sealant layer 51, a printing layer 54, a base layer 52, a first adhesive layer 57a, a barrier layer 55, a second adhesive layer 57b, an intermediate layer 58, an anchor coat layer 56, and a second sealant layer 53. The first sealant layer 51 includes a first resin layer 51a, a second resin layer 51b, and a third resin layer 51c, which are arranged in this order from the outer surface 501 to the inner surface 502. The second sealant layer 53 includes a first resin layer 53a and a second resin layer 53b, which are arranged in this order from the inner surface 502 to the outer surface 501. In the example shown in FIG. 2D, the first resin layer 51a of the first sealant layer 51 constitutes the outer surface of the body tube 30. Additionally, the first resin layer 53a of the second sealant layer 53 forms the inner surface of the body tube 30.

2E, the laminate 50 includes, in this order from the outer surface 501 to the inner surface 502, a protective layer 59, a first printed layer 54a, a first sealant layer 51, a first adhesive layer 57a, a first barrier layer 55a (barrier layer 55), a base layer 52, a second adhesive layer 57b, a first intermediate layer 58a, a third adhesive layer 57c, a second barrier layer 55b (barrier layer 55), a fourth adhesive layer 57d, a second intermediate layer 58b, a fifth adhesive layer 57e, and a second sealant layer 53. Of these, the first sealant layer 51 includes a first resin layer 51a, a second resin layer 51b, and a third resin layer 51c, which are arranged in this order from the outer surface 501 to the inner surface 502. The base layer 52 has a first resin layer 52a, a second resin layer 52b, and a third resin layer 52c arranged in this order from the outer surface 501 to the inner surface 502. The second sealant layer 53 has a first resin layer 53a, a second resin layer 53b, and a third resin layer 53c arranged in this order from the inner surface 502 to the outer surface 501. In the example shown in FIG. 2E, the protective layer 59 forms the outer surface of the body tube 30. The first resin layer 53a of the second sealant layer 53 forms the inner surface of the body tube 30.

Furthermore, as shown in FIG. 2F, the laminate 50 includes, in this order from the outer surface 501 to the inner surface 502, a first sealant layer 51, a first adhesive layer 57a, a base layer 52, a printing layer 54, a second adhesive layer 57b, a barrier layer 55, an intermediate layer 58, a third adhesive layer 57c, and a second sealant layer 53. In the example shown in FIG. 2F, the first sealant layer 51 forms the outer surface of the body tube 30. The second sealant layer 53 forms the inner surface of the body tube 30.

Each layer of the laminate 50 is described below.

First sealant layer The first sealant layer 51 is a layer for bonding the laminates 50 together. A material that melts and fuses by heat is used as a material constituting the first sealant layer 51. For example, polyolefin is used for the first sealant layer 51. More specifically, for example, the first sealant layer 51 may be made of a resin consisting of one or more of other resins such as low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), linear low density polyethylene (LLDPE), polypropylene, acid-modified polyolefin resins obtained by modifying polyolefin resins such as polyethylene or polypropylene with acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, or other unsaturated carboxylic acids, polyvinyl acetate resins, polyester resins, polystyrene resins, polyacrylonitrile, saturated polyesters, or polyvinyl alcohol. In addition, when the first sealant layer 51 is a multi-layered layer, the first resin layer 51 a, the second resin layer 51 b, and the third resin layer 51 c may be made of the resin materials described above. In addition, the polyethylene may contain a biomass-derived component, or the polyethylene may contain a biomass-derived component.

The first sealant layer 51 may include an extrusion laminate molding layer or an inflation molding layer. In this case, the first resin layer 51a described above may be an extrusion laminate molding layer or an inflation molding layer formed on the second resin layer 51b. This can improve the moldability of the first ridge line 11 and the second ridge line 12 described later.

In the present embodiment, when preparing the first sealant layer 51, for example, first, a desired additive is added to a resin composition mainly composed of one or more of the above resins. In this manner, a desired resin composition is prepared. Next, the resin composition prepared above is used to form a film or sheet as the first sealant layer 51, for example, by an inflation method or other molding method.

The material for the first sealant layer 51 may be a material containing, for example, an antiblocking agent, a lubricant (such as a fatty acid amide), a flame retardant, an inorganic or organic filler, or the like.

In this embodiment, the thickness of the first sealant layer 51 is preferably 50 μm or more and 250 μm or less.

Substrate layer The substrate layer 52 is, for example, a layer for supporting the first sealant layer 51 and the second sealant layer 53 and for increasing the strength of the entire laminate 50. As a material for constituting the substrate layer 52, for example, a polyester-based resin, a polyamide-based resin, a polyaramid-based resin, a polyolefin-based resin, a polycarbonate-based resin, a polyacetal-based resin, a fluorine-based resin or other tough resin may be used. The substrate layer 52 may be made of a film or sheet made of the above-mentioned resin. As an example, the substrate layer 52 may contain polyethylene terephthalate. When the substrate layer 52 contains polyethylene terephthalate, the polyethylene terephthalate may contain a biomass-derived component. When the substrate layer 52 is multi-layered, the first resin layer 52a, the second resin layer 52b, and the third resin layer 52c may be made of the above-mentioned resin material.

In addition, an unstretched film may be used as the above-mentioned resin film or sheet. In addition, a stretched film stretched in a uniaxial direction or a biaxial direction may be used as the above-mentioned resin film or sheet. Among them, in this embodiment, it is preferable that the film used as the base layer 52 is a biaxially stretched polyester resin film because it has excellent printability.

The base material layer 52 may also contain paper. In this case, the base material layer 52 may be a material that provides formability, bending resistance, rigidity, etc. to the laminate 50, such as bleached or unbleached paper, or a paper base material such as pure white roll paper, craft paper, paperboard, or processed paper. The basis weight of the paper constituting the base material layer 52 may be, for example, 80 g/m ² or more and 600 g/m ² or less, and is preferably 100 g/m ² or more and 450 g/m ² or less.

In this embodiment, the thickness of the base layer 52 is preferably 10 μm or more and 25 μm or less.

Second sealant layer The second sealant layer 53 is a layer for bonding the laminates 50 together. The material constituting the second sealant layer 53 may be, for example, the same material as that of the above-mentioned first sealant layer 51. When the second sealant layer 53 is a multi-layered layer, the first resin layer 53a, the second resin layer 53b, and the third resin layer 53c may be made of the above-mentioned resin material.

In this embodiment, the thickness of the second sealant layer 53 is preferably 50 μm or more and 250 μm or less.

Printed layer The printed layers such as the first printed layer 54a and the second printed layer 54b are layers on which a pattern or the like is printed. The printed layers such as the first printed layer 54a and the second printed layer 54b are layers for improving the design of the laminate 50. As the printed layer, an ink composition mainly composed of one or more types of normal ink vehicles may be used. In addition, as the printed layer, an ink composition obtained by adding one or more types of additives arbitrarily, further adding a colorant such as a dye or pigment, and then thoroughly kneading with a solvent, a diluent, or the like may be used. In addition, as the additive, a plasticizer, a stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, a curing agent, a crosslinking agent, a lubricant, an antistatic agent, a filler, or other additives may be used. As such an ink vehicle, for example, one or more of 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, ethylcellulose, chlorinated rubber, cyclized rubber, or other materials may be used. The printing method may be gravure printing, letterpress printing, screen printing, transfer printing, flexographic printing, or other printing methods. In this specification, the term "picture" refers to characters, figures, symbols, patterns, colors, or combinations thereof.

The barrier layers such as the first barrier layer 55a and the second barrier layer 55b are layers for suppressing the transmission of oxygen gas and water vapor. For example, a gas barrier material against oxygen gas or water vapor, a light shielding material against sunlight, or a material having aroma retention for the contents may be used as the barrier layer. Specifically, for example, a thin metal deposition layer of aluminum foil, tin, lead, copper, iron, nickel, or an alloy thereof, or aluminum may be used as the barrier layer. When aluminum foil is used as the barrier layer, the thickness of the barrier layer can be about 5 μm or more and 20 μm or less. By using aluminum foil as the barrier layer, the production of the laminate 50 becomes easier. In addition, by using aluminum foil as the barrier layer, the formability of the first ridge 11 and the second ridge 12 described later can be further improved, and the shapes of the formed first ridge 11 and the second ridge 12 can be effectively maintained.

When using a metal vapor deposition layer such as aluminum as the barrier layer, a vapor deposition thin film of a metal such as aluminum can be formed on the intermediate layer using, for example, a physical vapor deposition method (PVD method) such as vacuum deposition, sputtering, ion plating, or cluster ion beam method.

When a metal vapor-deposited layer of aluminum is used as the barrier layer, the thickness of the barrier layer is usually preferably about 50 Å or more and 3000 Å or less, and particularly preferably about 100 Å or more and 2000 Å or less. In order to increase the adhesion of the vapor-deposited film, the surface of the intermediate layer supporting the vapor-deposited thin aluminum film may be coated in advance with, for example, a vapor-deposition primer, or the surface of the intermediate layer may be subjected to any desired pretreatment.

The barrier layer may also be a transparent vapor deposition layer that can be formed by a conventionally known method. By using a transparent vapor deposition layer as the barrier layer, the laminate 50 can also be made transparent. In this case, the barrier layer may be a transparent vapor deposition layer made of a vapor deposition layer of an inorganic oxide.

As the transparent deposition layer, for example, a deposition 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) can be used. In particular, as the transparent deposition layer for the tube container, it is preferable to have a deposition layer containing aluminum oxide or silicon oxide.

Inorganic oxides are expressed as MO _x (wherein M represents an inorganic element, and the value of X varies depending on the inorganic element), such as SiO _x and AlO _x . The range of the value of X is as follows: silicon (Si) is 0-2, aluminum (Al) is 0-1.5, magnesium (Mg) is 0-1, calcium (Ca) is 0-1, potassium (K) is 0-0.5, tin (Sn) is 0-2, sodium (Na) is 0-0.5, boron (B) is 0-1.5, titanium (Ti) is 0-2, lead (Pb) is 0-2, zirconium (Zr) is 0-2, and yttrium (Y) is 0-1.5. In the above, when X=0, it is a completely inorganic element (pure substance), and the inorganic element is not transparent. The upper limit of the range of X is the value at which the material is completely oxidized. Silicon (Si) or aluminum (Al) is preferably used for the vapor deposition layer of the packaging material. In this case, when the inorganic element is silicon (Si), the value of X is preferably 1.0 to 2.0. In addition, when the inorganic element is aluminum (Al), the value of X is preferably 0.5 to 1.5.

The thickness of the transparent deposition layer varies depending on the type of inorganic oxide used, but the thickness of the transparent deposition layer is, for example, 50 Å to 2000 Å, preferably 100 Å to 1000 Å. For example, when the transparent deposition layer contains aluminum oxide or silicon oxide, the thickness of the transparent deposition layer is 50 Å to 500 Å, more preferably 100 Å to 300 Å.

The transparent deposition layer can be formed on the intermediate layer using the following formation method. The deposition layer may be formed by, for example, a physical vapor deposition method (PVD method) such as a vacuum deposition method, a sputtering method, or an ion plating method. The deposition layer may also be formed by, for example, a chemical vapor deposition method (CVD method) such as a plasma chemical vapor deposition method, a thermal chemical vapor deposition method, or a photochemical vapor deposition method. Specifically, the deposition layer may be formed on a forming roller using a roller-type deposition layer forming device. Furthermore, a gas barrier coating film may be provided on the deposition layer. This suppresses the permeation of oxygen, water vapor, and the like. In addition, by providing the gas barrier coating film adjacent to the deposition layer, the occurrence of cracks in the deposition layer is effectively suppressed. The gas barrier coating film contains at least one resin composition such as a hydrolyzate of a metal alkoxide or a hydrolyzed condensate of a metal alkoxide. The resin composition such as a hydrolyzate of a metal alkoxide or a hydrolyzed condensate of a metal alkoxide is obtained by polycondensing a mixture of a metal alkoxide and a water-soluble polymer by a sol-gel method. During polycondensation by the sol-gel method, the resin composition such as a hydrolyzate of a metal alkoxide or a hydrolyzed condensate of a metal alkoxide is polycondensed in the presence of a sol-gel catalyst, water, an organic solvent, and the like.

Protective layer The protective layer 59 is a layer for protecting the first sealant layer 51. As the protective layer 59, a resin composition or ink containing nitrocellulose resin, polyurethane resin, acrylic resin, polyamide resin, vinyl chloride-vinyl acetate resin, chlorinated PP resin, or the like may be used. The protective layer 59 may be formed by, for example, flexographic printing, letterpress printing, gravure printing, or the like. The protective layer 59 may be formed by gravure printing, particularly using an acrylic OP varnish. The protective layer 59 may be formed by flexographic printing or letterpress printing, particularly using a varnish for flexographic printing. The thickness of the protective layer 59 is preferably, for example, 0.5 μm or more and 5.0 μm or less.

Anchor Coat Layer The anchor coat layers, such as the first anchor coat layer 56a, the second anchor coat layer 56b, and the third anchor coat layer 56c, are layers for enhancing the adhesion between layers. The anchor coat layer 56 is formed by applying an anchor coat agent and drying it. The anchor coat agent may be any resin having a heat resistance temperature of 135°C or higher, such as an anchor coat agent made of vinyl modified resin, epoxy resin, urethane resin, polyester resin, or polyethyleneimine. In particular, the anchor coat agent is preferably a cured product of a polyacrylic resin or polymethacrylic resin (polyol) having two or more hydroxyl groups in the structure and an isocyanate compound as a curing agent. A silane coupling agent may be added to the anchor coat agent as an additive. Nitrocellulose may be added to the anchor coat agent to enhance heat resistance. The anchor coat layer after drying is preferably 1 μm or more and 10 μm or less.

Adhesive layers such as the first adhesive layer 57a, the second adhesive layer 57b, the third adhesive layer 57c, the fourth adhesive layer 57d, and the fifth adhesive layer 57e are layers for bonding the first sealant layer 51, the base material layer 52, the second sealant layer 53, etc. to each other. The material constituting the adhesive layer can be appropriately selected depending on the resin constituting the layer to be bonded.

For the adhesive layer, for example, an anchor coating agent such as an isocyanate (urethane), polyethyleneimine, polybutadiene, or organic titanium may be used. In addition, for example, a polyurethane, polyacrylic, polyester, epoxy, polyvinyl acetate, cellulose, or other laminating adhesive may be used as desired.

As materials for forming the adhesive layer, for example, polyethylene, polypropylene, ethylene-vinyl alcohol, ethylene-methacrylic acid copolymer (EMAA), ethylene-acrylic acid copolymer, ionomer, or maleic anhydride modified polyolefin resin can be suitably used.

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

The method for laminating the first sealant layer 51, the base layer 52, the second sealant layer 53, etc. to each other may be, for example, a wet lamination method, a dry lamination method, a solventless dry lamination method, an extrusion lamination method, a co-extrusion lamination method, an inflation method, or any other method. When performing the above-mentioned lamination, the film may be subjected to a pretreatment such as a corona treatment or an ozone treatment.

Intermediate Layer The intermediate layers such as the first intermediate layer 58a and the second intermediate layer 58b are, for example, layers for supporting the first sealant layer 51 or the second sealant layer 53 and for increasing the strength of the entire laminate 50. As a material for forming the intermediate layer 58, for example, a material similar to the material for forming the above-mentioned base layer 52 may be used. The intermediate layer 58 may also play a role in improving the design of the laminate 50. In this case, an emulsified polyethylene film or the like may be used as the intermediate layer 58.

In this embodiment, the thickness of the intermediate layer 58 is preferably 10 μm or more and 25 μm or less.

It is preferable that such a laminate 50 is made up of 90% or more by weight of the same material. This makes it easy to recycle the tube container 10 when it is recycled.

As shown in Figs. 3 and 4, the laminate 50 has a plurality of first ridges 11 that are convex toward the outer surface (first surface) 501, and a plurality of second ridges 12 that are convex toward the inner surface (second surface) 502. This gives the tube container 10 an excellent design with a three-dimensional feel. In addition, the contents slide easily along the first ridges 11. This allows the contents to be easily removed from the tube container 10. In particular, because the contents slide easily along the first ridges 11, the contents can be easily removed from the tube container 10 even when the remaining amount of contents is low.

The first ridge 11 may include a plurality of first curves 11a and a plurality of second curves 11b. The first curves 11a extend radially from a predetermined point P so as to be convex toward one side in a predetermined direction in a plan view. In the illustrated example, the plurality of first curves 11a extend radially from a predetermined point P so as to be convex toward one side in the X direction (the right side in FIG. 3) in a plan view. On the other hand, the plurality of second curves 11b extend radially from a predetermined point P so as to be convex toward the other side in a predetermined direction in a plan view. In the illustrated example, the second curves 11b extend radially from a predetermined point P so as to be convex toward the other side in the X direction (the left side in FIG. 3) in a plan view. As a result, as shown in FIG. 3, a rich design expression with a sense of luxury is realized in the tube container 10. This allows the design of the tube container 10 to be further improved.

In the illustrated example, each of the first curves 11a is an arc having the same radius of curvature, and the centers of the arcs are different from each other. In this case, the center of each arc is located at a position rotated by a predetermined angle (15° in the example shown in FIG. 3) around point P.

Each of the second ridge lines 12 may extend radially from a predetermined point P in a plan view and may be formed on an imaginary line IL passing through the intersection of the first curve 11a and the second curve 11b. This allows the laminate 50 to effectively express a three-dimensional effect. This improves the design of the tube container 10.

Here, by forming the first ridge 11 on the laminate 50, a plurality of uneven patterns 15 surrounded by the first ridge 11 are formed on the laminate 50. The adjacent uneven patterns 15 have different shapes. Here, as an example, one uneven pattern 15 is compared with another uneven pattern 15 located on the positive Y-direction side of the one uneven pattern 15 and located on the same virtual line IL. As shown in FIG. 3, the one uneven pattern 15 has a shape in which the length along the Y-direction is longer and the length along the X-direction of the uneven pattern 15 is shorter than the other uneven pattern 15. This makes it easier for the contents to slide down along the Y-direction as they move toward the negative Y-direction. Therefore, by joining the head member 40 to one end 31 (see FIG. 1) on the negative Y-direction side, the contents can be more easily taken out of the tube container 10.

As described above, the first ridge 11 may be configured to pass through a predetermined point P in a plan view. Here, as shown in FIG. 3, the predetermined point P is preferably a point provided at a position that does not overlap the laminate 50 in a plan view. As shown in FIG. 3, the length of the uneven pattern 15 along the direction in which the virtual line IL extends increases as the point P is approached, and the length of the uneven pattern 15 along the direction perpendicular to the direction in which the virtual line IL extends decreases. That is, as the point P is approached, the contents become easier to slide toward the point P. Therefore, by providing the point P at a position that does not overlap the laminate 50 in a plan view, the contents can be taken out of the tube container 10 more easily. Although not shown, the point P may be a point provided at a position that overlaps the laminate 50 in a plan view.

As shown in FIG. 4, in a given cross section, the height H1 from the second ridge 12 to the first ridge 11 adjacent to the second ridge 12 is 0.1 mm or more and 0.5 mm or less. Here, the given cross section is a cross section along the normal direction N1 of the first plane P1. The first plane P1 is a plane including a plurality of first ridges 11. Furthermore, the height H1 is the height on the outer surface (first surface) 501. When the height H1 is 0.1 mm or more, the first ridge 11 becomes conspicuous. Therefore, the design of the tube container 10 can be improved. Furthermore, when the height H1 is 0.5 mm or less, the moldability when forming the first ridge 11 and the second ridge 12 by embossing can be improved, as described later. The height H1 described above and the height H2 described later can each be measured using a laser microscope (for example, a shape analysis laser microscope VK-8710 (product name) manufactured by Keyence Corporation).

In addition, in a specified cross section, the height H2 from the second ridge 12 to the first ridge 11 adjacent to the second ridge 12 is 0.1 mm or more and 0.5 mm or less. Here, the specified cross section is a cross section along the normal direction N2 of the second plane P2. Also, the second plane P2 is a plane including a plurality of second ridges 12. Furthermore, the height H2 is the height on the inner surface (second surface) 502. When the height H2 is 0.1 mm or more, the contents tend to slide down along the first ridge 11. Also, when the height H2 is 0.5 mm or less, as described later, the moldability can be improved when forming the first ridge 11 and the second ridge 12 by embossing. In this embodiment, the normal direction N2 of the second plane P2 is parallel to the normal direction N1 of the first plane P1. However, this is not limited to the above, and the normal direction N2 of the second plane P2 may be non-parallel to the normal direction N1 of the first plane P1.

Furthermore, height H1 may be equal to or greater than height H2. Here, it has been found that height H1 on outer surface 501 can have a greater effect on the shape-retaining performance of body tube 30 than height H2 on inner surface 502. It has also been found that by setting height H1 to height H2 or greater, the shape-retaining performance of body tube 30 can be improved. For this reason, by setting height H1 to height H2 or greater, the shape of body tube 30 can be effectively maintained.

In addition, by making the height H1 equal to or greater than the height H2, the design of the tube container 10 can be improved while maintaining good quality of the tube container 10. That is, as described above, when the height H1 is increased, the first ridge 11 becomes prominent on the outer surface 501, and the design of the tube container 10 can be improved. In addition, when the height H2 is decreased, the second sealant layer 53 or the second barrier layer 55b (barrier layer 55) of the laminate 50 can be prevented from being damaged by the embossing process. This can prevent the components of the contents (e.g., alcohol, etc.) from penetrating into each layer of the laminate 50, and can prevent, for example, the base layer 52 from being altered (e.g., swelling). In this way, by making the height H1 equal to or greater than the height H2, the design of the tube container 10 can be improved while maintaining good quality of the tube container 10.

The first ridge 11 described above may be provided to correspond to the pattern displayed by the printing layer 54. In this case, the first ridge 11 may be formed to follow the contour of the pattern displayed by the printing layer 54. This makes the pattern displayed by the printing layer 54 stand out. This further improves the design of the tube container 10.

Next, a method for manufacturing the capped tube container 10A will be described with reference to Figures 5 to 8.

First, for example, a laminate 50 as shown in FIG. 2A is prepared. In this case, a laminate intermediate 50a (see FIG. 5) having the layer structure shown in FIG. 2A is first prepared.

Next, as shown in FIG. 5, the laminate intermediate 50a is embossed to produce the laminate 50. In this laminate 50, a plurality of first ridges 11 that are convex toward the outer surface 501 and a plurality of second ridges 12 that are convex toward the inner surface 502 are formed. At this time, the laminate intermediate 50a passes between a cooling roll 85 having an uneven surface formed thereon and a rubber roll 86 having an uneven surface formed thereon. As a result, a plurality of first ridges 11 that are convex toward the outer surface 501 and a plurality of second ridges 12 that are convex toward the inner surface 502 are formed in the laminate intermediate 50a. In this way, the laminate 50 is obtained.

Next, the laminate 50 is rolled and the opposing edges 35 are joined together, for example, by heat sealing. This forms the laminate 50 into a cylinder, and the body tube 30 is produced. At this time, first, as shown in FIG. 6(a), the laminate 50 is wrapped around the outer surface of the cylindrical inner seal member 80, and the opposing edges 35 of the laminate 50 are overlapped. At this time, the laminate 50 is wrapped around the inner seal member 80 so that the second sealant layer 53 of the laminate 50 faces the outer surface of the inner seal member 80. In addition, when overlapping the opposing edges 35 of the laminate 50, the laminate 50 is transported downstream (left side of FIG. 6(a)) by a guide roll (not shown). The inner seal member 80 is made of metal, for example, stainless steel.

Next, as shown in FIG. 6(b), an outer seal member 81 is pressed against the overlapping portion of the opposing edges 35 of the laminate 50, and the overlapping portion of the opposing edges 35 of the laminate 50 is sandwiched between the inner seal member 80 and the outer seal member 81. Next, the overlapping portion of the opposing edges 35 of the laminate 50 is joined by heat sealing.

In this case, the first sealant layer 51 (see FIG. 2A) provided on the outer surface 501 side of the laminate 50 and the second sealant layer 53 (see FIG. 2A) provided on the inner surface 502 side are melted and joined.

Then, the joined laminate 50 is cut into individual body tubes 30. In this way, the body tubes 30 are produced as shown in FIG. 7. At this time, the speed at which the body tubes 30 are produced may be about 300 pieces/min.

Next, the tube container 10 described above is manufactured by compression molding. In this case, the body tube 30 is inserted into a metal mold (not shown), and molten resin is supplied into the metal mold from a resin supply device (not shown), whereby the head member 40 is compression molded into one opening 50A of the body tube 30. This results in a tube container 10 including the body tube 30 and the head member 40 joined to one end 31 of the body tube 30 (see FIG. 8).

As described above, the body tube 30 and the head member 40 are joined by thermal welding when the head member 40 is molded by compression molding. However, this is not limited to this, and the body tube 30 and the head member 40 may also be joined by injection molding.

Next, a cap 20 is attached to the head member 40 of the obtained tube container 10, and a capped tube container 10A with the cap 20 attached is obtained. After that, multiple capped tube containers 10A are transported to a factory or the like for filling with the contents C.

Then, the capped tube container 10A is transported to a factory or the like for filling with the contents C, and the contents C are filled therein. At this time, for example, a cleansing agent, toothpaste, or other contents C are filled in an appropriate amount through the opening 50B (see FIG. 8) of the body tube 30. The opening 50B is then welded to form the bottom seal portion 34 (see FIG. 1), and the capped tube container 10A filled and packaged with the contents C is obtained.

As described above, according to this embodiment, the laminate 50 is formed with a plurality of first ridges 11 that are convex toward the outer surface 501, and a plurality of second ridges 12 that are convex toward the inner surface 502. This gives the tube container 10 an excellent design with a three-dimensional feel. Furthermore, in the tube container 10, the roundness of the body tube 30 can be maintained at a high level. This makes it easier for the consumer to crush the body tube 30 with their fingers. This makes it easier to remove the contents from the tube container 10.

In addition, on the outer surface 501, the height H1 from the second ridge 12 to the first ridge 11 is 0.1 mm or more and 0.5 mm or less. Since the height H1 is 0.1 mm or more, the first ridge 11 becomes conspicuous, and the design of the tube container 10 can be improved. Furthermore, since the height H1 is 0.5 mm or less, the moldability when forming the first ridge 11 and the second ridge 12 by embossing can be improved. Furthermore, on the inner surface 502, the height H1 from the second ridge 12 to the first ridge 11 is 0.1 mm or more and 0.5 mm or less. Since the height H2 is 0.1 mm or more, the contents tend to slide down along the first ridge 11. Furthermore, since the height H2 is 0.5 mm or less, the moldability when forming the first ridge 11 and the second ridge 12 by embossing can be improved. The fact that the contents can be easily taken out of the tube container 10 will be explained by the examples described later.

Furthermore, according to this embodiment, the first ridge 11 includes a plurality of first curves 11a extending radially from a predetermined point P so as to be convex toward one side in the X direction (the right side in FIG. 3) in a plan view, and a plurality of second curves 11b extending radially from a predetermined point P so as to be convex toward the other side in the X direction (the left side in FIG. 3) in a plan view. This allows the tube container 10 to achieve a rich design expression with a luxurious feel. This further improves the design of the tube container 10.

In addition, according to this embodiment, each of the second ridge lines 12 extends radially from a predetermined point P in a plan view and is formed on an imaginary line IL passing through the intersection of the first curve 11a and the second curve 11b. This allows the laminate 50 to effectively express a three-dimensional effect. This improves the design of the tube container 10.

In addition, according to this embodiment, the first sealant layer 51 includes an extrusion laminate molding layer or an inflation molding layer. This improves the moldability of the first ridge line 11 and the second ridge line 12 when forming the first ridge line 11 and the second ridge line 12 in the laminate 50.

In addition, according to this embodiment, a printing layer 54 is further provided on the base material layer 52. This further improves the design of the tube container 10.

In addition, according to this embodiment, the first ridge 11 corresponds to the pattern displayed by the printing layer 54. This further improves the design of the tube container 10.

In addition, according to this embodiment, the tube container 10 further includes a barrier layer 55 provided between the base layer 52 and the second sealant layer 53, and the barrier layer 55 is made of aluminum foil. This improves the barrier properties of the tube container 10. In addition, since the barrier layer 55 is made of aluminum foil, the formability of the first ridge line 11 and the second ridge line 12 can be further improved, and the shapes of the first ridge line 11 and the second ridge line 12 can be effectively maintained.

In addition, according to this embodiment, the laminate 50 further includes a protective layer 59 that constitutes the outer surface 501 of the laminate 50 and protects the first sealant layer 51. This makes it possible to prevent the first sealant layer 51 from being scratched. Therefore, even if the body tubes 30 rub against each other, it is possible to prevent the outer surface of the body tubes 30 from being scratched, and the appearance of the tube container 10 can be maintained.

In addition, according to this embodiment, at least one of the first sealant layer 51, the base material layer 52, and the second sealant layer 53 contains a biomass-derived component. This reduces the amount of carbon dioxide emitted in the series of processes for producing the body tube 30. This reduces the environmental impact of the tube container 10.

In addition, according to this embodiment, the base layer 52 contains paper. This allows the amount of resin used in the laminate 50 to be reduced. This allows the amount of plastic used in the body tube 30 to be reduced, thereby reducing the environmental impact of the tube container 10.

In the above-described embodiment, an example has been described in which the first ridge 11 is convex toward the outer surface 501 and the second ridge 12 is convex toward the inner surface 502, but this is not limiting. For example, although not shown, the first ridge 11 may be convex toward the inner surface 502 and the second ridge 12 may be convex toward the outer surface 501.

In the above-described embodiment, an example has been described in which the first ridge 11 includes the first curve 11a and the second curve 11b, but this is not limited to this. For example, although not shown, the first ridge 11 and the second ridge 12 may be configured to present any pattern.

Next, we will describe a specific example of the above embodiment.

Example 1
First, the laminate 50 shown in Fig. 2A was produced. In this case, first, a polyethylene terephthalate film (manufactured by Toyobo Co., Ltd., EB512 (product name), thickness 12 µm) was prepared as the base layer 52. Next, a second printed layer 54b was formed on the polyethylene terephthalate film.

Next, polyethylene was extruded onto the second printed layer 54b as the first adhesive layer 57a via an anchor coating material. The thickness of the first adhesive layer 57a was set to 20 μm. In this manner, the first intermediate of the laminate 50 was produced. The layer structure of the obtained first intermediate was as follows.
PET/Print/AC/Adhesive In the above, "PET" means polyethylene terephthalate (same below). Also, "/" represents the boundary between layers (same below). Also, "Print" means the printed layer (same below). Also, "AC" means the anchor coat layer (same below). And "Adhesive" means the adhesive layer (same below).

Next, a milky white polyethylene film (SR-WN2 (product name), thickness 100 μm, manufactured by DNP Technopack Co., Ltd.) was prepared as the intermediate layer 58. Furthermore, an aluminum foil (thickness 10 μm) was prepared as the barrier layer 55. Furthermore, a linear low-density polyethylene film (SR-WN2 (product name), thickness 100 μm, manufactured by DNP Technopack Co., Ltd.) was prepared as the second sealant layer 53.

Next, the intermediate layer 58 was laminated on the first adhesive layer 57a of the first intermediate body. Furthermore, an ethylene-methacrylic acid copolymer was extruded as the second adhesive layer 57b on the intermediate layer 58, and the barrier layer 55 was laminated on the second adhesive layer 57b by the extrusion lamination method. The thickness of the second adhesive layer 57b was set to 20 μm. Furthermore, an ethylene-methacrylic acid copolymer was extruded as the third adhesive layer 57c on the barrier layer 55, and the second sealant layer 53 was laminated on the third adhesive layer 57c by the extrusion lamination method. The thickness of the third adhesive layer 57c was set to 30 μm. In this manner, the second intermediate body of the laminate 50 was produced. The layer structure of the obtained second intermediate body is as follows.
PET/mark/AC/contact/milk white PE/contact/ALM foil/contact/PE
In the above, "milky PE" means milky polyethylene film (hereinafter the same). Also, "ALM foil" means aluminum foil (hereinafter the same). Furthermore, "PE" means polyethylene (hereinafter the same).

Next, polyethylene was extruded onto the base layer 52 of the second intermediate body via an anchor coating material to form the third resin layer 51c of the first sealant layer 51. The thickness of the third resin layer 51c was set to 20 μm.

Next, a linear low-density polyethylene film (SR-WN2 (product name), thickness 60 μm, manufactured by DNP Technopack Co., Ltd.) was prepared as the second resin layer 51b of the first sealant layer 51, and the second resin layer 51b was laminated on the third resin layer 51c by extrusion lamination. Furthermore, polyethylene was extruded onto the second resin layer 51b as the first resin layer 51a, and the first resin layer 51a as the first sealant layer 51 was laminated on the second resin layer 51b. The thickness of the first resin layer 51a was 30 μm. In this manner, a third intermediate of the laminate 50 was produced. The layer structure of the obtained third intermediate is as follows.
PE/PE/PE/AC/PET/Mark/AC/Contact/Opalized PE/Contact/ALM foil/Contact/PE

Next, a first printed layer 54a was formed on the first resin layer 51a of the first sealant layer 51. Then, varnish was printed on the first printed layer 54a as a protective layer 59 for protecting the first printed layer 54a. In this manner, a laminate intermediate 50a was produced. The layer structure of the obtained laminate intermediate 50a is as follows.
Varnish/mark/PE/PE/PE/AC/PET/mark/AC/bond/milky white PE/bond/ALM foil/bond/PE

Then, the laminate intermediate 50a was embossed to produce the laminate 50. At this time, the laminate intermediate 50a, which had a length of about 1000 m, was continuously embossed. Furthermore, on the outer surface 501, the height H1 from the second ridge 12 to the first ridge 11 was 253.8 μm. Furthermore, on the inner surface 502, the height H2 from the second ridge 12 to the first ridge 11 was 263.7 μm. The heights H1 and H2 were each measured using a laser microscope (Keyence Corporation, shape analysis laser microscope VK-8710 (product name)).

(1) Moldability Evaluation Next, moldability evaluation was performed when producing the laminate 50 from the laminate intermediate 50a. At this time, it was observed whether the laminate 50 could be easily peeled off from the cooling roll 85 and the rubber roll 86. In addition, it was observed whether clogging occurred on the surfaces of the cooling roll 85 and the rubber roll 86.

(2) Evaluation of the sliding time of the contents The sliding time of the contents was also evaluated. At this time, the obtained laminate 50 was attached to a wall surface. At this time, the laminate 50 was attached to the wall surface so that the outer surface 501 of the laminate 50 faces the wall surface and the Y direction (flow direction of the laminate 50) is parallel to the up-down direction. Next, the contents were applied to the inner surface 502 of the laminate 50. At this time, about 3 g of the contents were applied to the inner surface 502 of the laminate 50 so that the contents were cylindrical with a diameter of about 4 mm and a height of about 5 mm. As the contents, a treatment (Ichikami Treatment (product name) manufactured by Kracie Co., Ltd.) and a hand cream (Q10 (product surface) manufactured by Kose Co., Ltd.) were used. Then, the time when the applied contents slid 100 mm down the inner surface 502 of the laminate 50 was measured. The measurement was performed three times for each content, and the average value was taken as the sliding time.

(3) Evaluation of Scratch Resistance The scratch resistance was also evaluated. First, two tube containers 10 shown in Fig. 1 were produced using the obtained laminate 50. Next, the body tubes 30 of the tube containers 10 were rubbed against each other, and scratches generated on the body tubes 30 were observed.

(4) Barrier property evaluation Barrier property evaluation was also performed. At this time, the oxygen permeability of the laminate 50 (100 mm x 100 mm) was measured in a 23°C x 90% RH environment using the MOCON method in accordance with JIS K7126-2 (constant pressure method). In addition, the water vapor permeability of the laminate 50 (100 mm x 100 mm) was measured in a 40°C x 90% RH environment using the MOCON method in accordance with JIS K7129B.

(5) Loop Stiffness Evaluation Furthermore, loop stiffness evaluation was performed. In this evaluation, first, the loop stiffness in the machine direction (Y direction) of the laminate 50 was measured. Here, the loop stiffness is a parameter that represents the stiffness of the laminate 50.

At this time, the laminate 50 was first cut to a width of 15 mm and a length of 100 mm to prepare a test piece. At this time, the test piece was cut so that the longitudinal direction of the test piece coincided with the flow direction (Y direction) of the laminate 50. Next, the longitudinal ends of the test piece were clamped by a pair of chucks (not shown), and the chucks were brought close to each other to roll the test piece into a loop. At this time, the loop length was set to 70 mm. Next, the loop stiffness was measured by pressing the test piece with an indenter (not shown). When pressing the test piece with the indenter, the vertical distance between the chuck that holds the test piece and the indenter was 15 mm at the initial position. Then, the indenter was lowered from the initial position to press the test piece with the indenter. As a measuring device, a loop stiffness tester (registered trademark) manufactured by Toyo Seiki Seisakusho Co., Ltd. was used. The load range was 5000 mN, the compression speed was 3.3 mm/s, and the time it took for the indenter to press the test piece was 3 seconds.

The loop stiffness in the width direction (X direction) of the laminate 50 was also measured. In this case, the test piece was cut out so that the longitudinal direction of the test piece coincided with the width direction of the laminate 50. The loop stiffness was measured in the same manner as the measurement of the loop stiffness in the flow direction of the laminate 50.

Example 2
First, the laminate 50 shown in Fig. 2B was produced. In this process, a polyethylene terephthalate film (manufactured by Toyobo Co., Ltd., EB512 (product name), thickness 12 µm) was prepared as the base layer 52. In addition, a polyethylene terephthalate film (manufactured by Toray Advanced Film Co., Ltd., VM-PET 1310 (product name), thickness 12 µm) provided with an aluminum vapor deposition layer (first barrier layer 55a) was prepared as the first intermediate layer 58a.

Next, the polyethylene terephthalate film for the base layer 52 and the polyethylene terephthalate film for the first intermediate layer 58a were bonded by a dry lamination method to prepare a first intermediate body of the laminate 50. The layer structure of the obtained first intermediate body is as follows.
PET/DL/ALM/PET
In the above, "DL" means an adhesive layer formed by the dry lamination method using a two-liquid curing urethane adhesive (hereinafter the same), and "ALM" means an aluminum vapor deposition layer (hereinafter the same).

A milky white polyethylene film (HD White (product name), thickness 60 μm, manufactured by Tamapoly Co., Ltd.) was prepared as the second intermediate layer 58b.

Next, polyethylene was extruded onto the first intermediate layer 58a of the first intermediate body via an anchor coating material as the second adhesive layer 57b, and the second intermediate layer 58b was laminated onto the second adhesive layer 57b by extrusion lamination. The thickness of the second adhesive layer 57b was set to 20 μm. In this manner, the second intermediate body of the laminate 50 was produced. The layer structure of the obtained second intermediate body is as follows.
PET/DL/ALM/PET/AC/Contact/Milk-white PE

Next, aluminum foil (thickness 10 μm) was prepared as the second barrier layer 55b.

Next, an ethylene-methacrylic acid copolymer was extruded as a third adhesive layer 57c onto the second intermediate layer 58b of the second intermediate body via an anchor coating material, and a second barrier layer 55b was laminated on the third adhesive layer 57c by extrusion lamination. The thickness of the third adhesive layer 57c was set to 20 μm. An ethylene-methacrylic acid copolymer was extruded as a fourth adhesive layer 57d onto the second barrier layer 55b, and a second resin layer 53b as a second sealant layer 53 was laminated on the fourth adhesive layer 57d. The thickness of the fourth adhesive layer 57d was set to 30 μm, and the thickness of the second resin layer 53b was set to 25 μm. Furthermore, low-density polyethylene (Novatec LC602A (product name) manufactured by Japan Polyethylene Corporation) was extruded as the first resin layer 53a onto the second resin layer 53b as the second sealant layer 53, and the first resin layer 53a as the second sealant layer 53 was laminated on the second resin layer 53b. The thickness of the first resin layer 53a was set to 25 μm. In this manner, a third intermediate of the laminate 50 was produced. The layer structure of the obtained third intermediate is as follows.
PET／DL／ALM／PET／AC／Contact／Milk white PE／AC／Contact／ALM foil／Contact／PE／PE

Next, polyethylene was extruded onto the base layer 52 of the third intermediate body via an anchor coating material to form the second resin layer 51b of the first sealant layer 51. The thickness of the second resin layer 51b was set to 20 μm.

Next, low-density polyethylene (Novatec LC602A (product name) manufactured by Japan Polyethylene Corporation) was extruded as the first resin layer 51a onto the second resin layer 51b as the first sealant layer 51, and the first resin layer 51a as the first sealant layer 51 was laminated on the second resin layer 51b. The thickness of the first resin layer 51a was 30 μm. In this manner, a fourth intermediate of the laminate 50 was produced. The layer structure of the obtained fourth intermediate is as follows.
PE/PE/AC/PET/DL/ALM/PET/AC/Contact/Milk white PE/AC/Contact/ALM foil/Contact/PE/PE

Next, a first printed layer 54a was formed on the first resin layer 51a of the first sealant layer 51. Then, varnish was printed on the first printed layer 54a as a protective layer 59 for protecting the first printed layer 54a. In this manner, a laminate intermediate 50a was produced. The layer structure of the obtained laminate intermediate 50a is as follows.
Varnish/mark/PE/PE/AC/PET/DL/ALM/PET/AC/bonding/milky white PE/AC/bonding/ALM foil/bonding/PE/PE

Next, the laminate intermediate 50a was embossed to produce the laminate 50. At this time, the laminate intermediate 50a, which had a length of approximately 1000 m, was embossed continuously. Furthermore, on the outer surface 501, the height H1 from the second ridge 12 to the first ridge 11 was 253.8 μm. Furthermore, on the inner surface 502, the height H2 from the second ridge 12 to the first ridge 11 was 263.7 μm.

Then, in the same manner as in Example 1, evaluations of moldability, slippage time of contents, scratch resistance, barrier properties, and loop stiffness were performed.

Example 3
First, the laminate 50 shown in Fig. 2C was produced. In this case, first, a polyethylene terephthalate film (manufactured by Toyobo Co., Ltd., EB512 (product name), thickness 12 µm) was prepared as the base layer 52. Next, a printing layer 54 was formed on the polyethylene terephthalate film.

As the first intermediate layer 58a, a polyethylene terephthalate film (product name VM-PET 1310, manufactured by Toray Advanced Film Co., Ltd., thickness 12 μm) with an aluminum vapor deposition layer (first barrier layer 55a) was prepared. As the second intermediate layer 58b, a linear low-density polyethylene film (product name SR-WN2, manufactured by DNP Technopack Co., Ltd., thickness 80 μm) was prepared.

Next, the polyethylene terephthalate film for the base layer 52, the polyethylene terephthalate film for the first intermediate layer 58a, and the linear low-density polyethylene film for the second intermediate layer 58b were bonded by a dry lamination method to prepare a first intermediate body of the laminate 50. The layer structure of the obtained first intermediate body is as follows.
PET/Seal/DL/ALM/PET/DL/PE

Next, an aluminum foil (thickness 9 μm) was prepared as the second barrier layer 55b. A linear low-density polyethylene film (SR-XN (product name), thickness 100 μm, manufactured by DNP Technopack Co., Ltd.) was prepared as the second sealant layer 53.

Next, an ethylene-methacrylic acid copolymer was extruded as a third adhesive layer 57c onto the second intermediate layer 58b of the first intermediate body via an anchor coating material, and the second barrier layer 55b was laminated on the third adhesive layer 57c by extrusion lamination. The thickness of the third adhesive layer 57c was set to 20 μm. Furthermore, an ethylene-methacrylic acid copolymer was extruded as a fourth adhesive layer 57d onto the second barrier layer 55b, and the second sealant layer 53 was laminated on the fourth adhesive layer 57d. The thickness of the fourth adhesive layer 57d was set to 30 μm. In this manner, a second intermediate body of the laminate 50 was produced. The layer structure of the obtained second intermediate body is as follows.
PET/Mark/DL/ALM/PET/DL/PE/AC/Contact/ALM foil/Contact/PE

Next, polyethylene was extruded onto the base layer 52 of the second intermediate body via an anchor coating material to form the third resin layer 51c of the first sealant layer 51. The thickness of the third resin layer 51c was set to 20 μm.

Next, a linear low-density polyethylene film (SR-WN2 (product name), thickness 60 μm, manufactured by DNP Technopack Co., Ltd.) was prepared as the second resin layer 51b of the first sealant layer 51, and the second resin layer 51b was laminated on the third resin layer 51c by extrusion lamination. In addition, low-density polyethylene (Novatec LC602A (product name), manufactured by Japan Polyethylene Co., Ltd.) was extruded as the first resin layer 51a on the second resin layer 51b, and the first resin layer 51a as the first sealant layer 51 was laminated on the second resin layer 51b. The thickness of the first resin layer 51a was 30 μm. In this way, a third intermediate of the laminate 50 was produced. The layer structure of the obtained third intermediate is as follows.
PE/PE/PE/AC/PET/Mark/DL/ALM/PET/DL/PE/AC/Contact/ALM foil/Contact/PE

Next, varnish was printed on the first resin layer 51a of the first sealant layer 51 as a protective layer 59 for protecting the first sealant layer 51. In this manner, a laminate intermediate 50a was produced. The layer structure of the obtained laminate intermediate 50a is as follows.
Varnish / PE / PE / PE / AC / PET / Seal / DL / ALM / PET / DL / PE / AC / Contact / ALM foil / Contact / PE

Next, the laminate intermediate 50a was embossed to produce the laminate 50. At this time, the laminate intermediate 50a, which was approximately 1000 m long, was embossed continuously. Furthermore, on the outer surface 501, the height H1 from the second ridge 12 to the first ridge 11 was 253.8 μm. Furthermore, on the inner surface 502, the height H2 from the second ridge 12 to the first ridge 11 was 263.7 μm.

Then, in the same manner as in Example 1, evaluations of moldability, slippage time of contents, scratch resistance, barrier properties, and loop stiffness were performed.

Example 4
First, the laminate 50 shown in Fig. 2D was produced. In this case, first, an aluminum foil (thickness 9 µm) was prepared as the barrier layer 55. In addition, a polyethylene terephthalate film (manufactured by Toyobo Co., Ltd., E5200 (product name), thickness 12 µm) was prepared as the intermediate layer 58.

Next, an aluminum foil for the barrier layer 55 and a polyethylene terephthalate film for the intermediate layer 58 were bonded by a dry lamination method to prepare a first intermediate body of the laminate 50. The layer structure of the obtained first intermediate body was as follows.
ALM foil/DL/PET

Also, bleached paper (Nagoya Sararyuo, manufactured by Daio Paper Co., Ltd., basis weight 76 g/m ² ) was prepared as the base material layer 52. Subsequently, a printing layer 54 was formed on the base material layer 52.

Next, an ethylene-methacrylic acid copolymer was extruded onto the above-mentioned base layer 52 as the first adhesive layer 57a, and the barrier layer 55 of the first intermediate was laminated onto the first adhesive layer 57a by extrusion lamination. The thickness of the first adhesive layer 57a was set to 20 μm. In this manner, the second intermediate of the laminate 50 was produced. The layer structure of the obtained second intermediate was as follows.
Stamp / Bleached paper / Contact / ALM foil / DL / PET

Next, polyethylene was extruded onto the printed layer 54 of the second intermediate body as the third resin layer 51c of the first sealant layer 51. The thickness of the third resin layer 51c was set to 20 μm.

Next, a linear low-density polyethylene film (SR-WN2 (product name), thickness 60 μm, manufactured by DNP Technopack Co., Ltd.) was prepared as the second resin layer 51b of the first sealant layer 51, and the second resin layer 51b was laminated on the third resin layer 51c by extrusion lamination. In addition, polyethylene was extruded onto the second resin layer 51b as the first resin layer 51a, and the first resin layer 51a as the first sealant layer 51 was laminated on the second resin layer 51b. The thickness of the first resin layer 51a was 20 μm. In this manner, a third intermediate of the laminate 50 was produced. The layer structure of the obtained third intermediate is as follows.
PE/PE/PE/Seal/Bleached paper/Contact/ALM foil/DL/PET

Next, polyethylene was extruded onto the intermediate layer 58 of the third intermediate body via an anchor coating material to form the second resin layer 53b of the second sealant layer 53. The thickness of the second resin layer 53b was set to 20 μm.

Next, a linear low-density polyethylene film (SR-WN2 (product name), thickness 60 μm, manufactured by DNP Technopack Co., Ltd.) was prepared as the first resin layer 53a of the second sealant layer 53, and the first resin layer 53a was laminated on the second resin layer 53b by extrusion lamination. In this manner, a laminate intermediate 50a was produced. The layer structure of the obtained laminate intermediate 50a is as follows.
PE/PE/PE/Seal/Bleached paper/Contact/ALM foil/DL/PET/AC/PE/PE

Next, the laminate intermediate 50a was embossed to produce the laminate 50. At this time, the laminate intermediate 50a, which had a length of approximately 1000 m, was embossed continuously. Furthermore, on the outer surface 501, the height H1 from the second ridge 12 to the first ridge 11 was 253.8 μm. Furthermore, on the inner surface 502, the height H2 from the second ridge 12 to the first ridge 11 was 263.7 μm.

Then, in the same manner as in Example 1, evaluations of moldability, slippage time of contents, scratch resistance, barrier properties, and loop stiffness were performed.

(Example 5)
First, the laminate 50 shown in FIG. 2E was produced. At this time, first, a linear low-density polyethylene (Dow Chemical, DOWLEX2098G (trade name), density 0.926 g/cm ³ ) was prepared as the first resin layer 52a of the base layer 52, a high-density polyethylene (ExxonMobil, HTA108 (trade name), density 0.961 g/cm ³ ) was prepared as the second resin layer 52b, and a linear low-density polyethylene (ExxonMobil, Exceed2018HA (trade name), density 0.918 g/cm ³ ) was prepared as the third resin layer 52c. Then, these resins were co-extruded by the inflation method to obtain a resin film as the base layer 52. The first resin layer 52a had a thickness of 12.5 μm, the second resin layer 52b had a thickness of 25 μm, and the third resin layer 52c had a thickness of 12.5 μm.

Next, an aluminum vapor deposition layer was formed as a first barrier layer 55a on the surface of the first resin layer 52a of the base layer 52 by a PVD method. The thickness of the aluminum vapor deposition layer was 20 nm. In this manner, a first intermediate of the laminate 50 was produced. The layer structure of the obtained first intermediate was as follows.
ALM/PE/PE/PE

Next, linear low-density polyethylene (Dow Chemical, DOWLEX2045G (trade name), density 0.920 g/cm ³ ) as the first intermediate layer 58a, adhesive resin (Mitsui Chemical, Admer NF557 (trade name)) as the third adhesive layer 57c, ethylene-vinyl alcohol copolymer (Kuraray, EVAL H171B (trade name), density 1.17 g/cm ³ , ethylene content 38 mol%) as the second barrier layer 55b, adhesive resin (Mitsui Chemical, Admer NF557 (trade name)) as the fourth adhesive layer 57d, and linear low-density polyethylene (Dow Chemical, DOWLEX2045G (trade name), density 0.920 g/cm ³ ) as the second intermediate layer 58b were prepared. These resins were then co-extruded by an inflation method to produce a second intermediate of the laminate 50.

In the second intermediate body, the first intermediate layer 58a had a thickness of 21.9 μm, the third adhesive layer 57c had a thickness of 6.25 μm, the second barrier layer 55b had a thickness of 18.75 μm, the fourth adhesive layer 57d had a thickness of 6.25 μm, and the second intermediate layer 58b had a thickness of 21.9 μm. The layer structure of the obtained second intermediate body is as follows.
PE/Contact/EVOH/Contact/PE

Next, low-density polyethylene (Sumikathene L705 (product name), density: 0.919 g/ ^cm3 , manufactured by Sumitomo Chemical) was extruded as the second adhesive layer 57b onto the third resin layer 52c of the base material layer 52 of the first intermediate, and the second intermediate was laminated on the second adhesive layer 57b by extrusion lamination. The thickness of the second adhesive layer 57b was 15 μm. In this manner, the third intermediate of the laminate 50 was produced. The layer structure of the obtained third intermediate was as follows.
ALM／PE／PE／PE／Contact／PE／Contact／EVOH／Contact／PE

Next, polyethylene (DOWLEX 2038.68G, AB-MB 101820-K, manufactured by Dow Chemical) was prepared as the first resin layer 53a of the second sealant layer 53, polyethylene (a mixture of ELITE 5538G (trade name) manufactured by Dow Chemical and LDPE LD2420F (trade name) manufactured by PTT CHEMICAL) was prepared as the second resin layer 53b, and polyethylene (a mixture of DOWLEX 2038.68G (trade name) manufactured by Dow Chemical and LDPE LD2420H (trade name) manufactured by PTT CHEMICAL) was prepared as the third resin layer 53c.

Next, low-density polyethylene (Sumikathene L705 (product name), density: 0.919 g/cm ³ , manufactured by Sumitomo Chemical) was extruded as a fifth adhesive layer 57e onto the second intermediate layer 58b of the third intermediate body, and the first resin layer 53a, the second resin layer 53b and the third resin layer 53c as the second sealant layer 53 were laminated onto the fifth adhesive layer 57e by a co-extrusion lamination method. The thickness of the first resin layer 53a was 30 μm, the thickness of the second resin layer 53b was 60 μm, and the thickness of the third resin layer 53c was 30 μm. In this way, a fourth intermediate body of the laminate 50 was produced. The layer structure of the obtained fourth intermediate body is as follows.
ALM／PE／PE／PE／Contact／PE／Contact／EVOH／Contact／PE／Contact／PE／PE／PE

Next, polyethylene (a mixture of ENABLE 2705MC (product name) manufactured by EXXON CHEMICAL, EXCEED 1327MA (product name) manufactured by EXXON CHEMICAL, and LDPE LD2420F (product name) manufactured by PTT CHEMICAL) as the first resin layer 51a of the first sealant layer 51, polyethylene (a mixture of ENABLE 3505MC (product name) manufactured by EXXON CHEMICAL, ELITE 5860G1 (product name) manufactured by Dow Chemical, and LDPE LD2420F (product name) manufactured by PTT CHEMICAL) as the second resin layer 51b, and polyethylene (ENABLE 2705MC (product surface) manufactured by EXXON CHEMICAL, EXCEED A mixture of 1327MA (product surface) and LDPE LD2420F (product surface) manufactured by PTT CHEMICAL was prepared. These resins were then co-extruded by the inflation method to produce the fifth intermediate of the laminate 50.

In the fifth intermediate body, the first resin layer 51a had a thickness of 18.75 μm, the second resin layer 51b had a thickness of 37.5 μm, and the third resin layer 51c had a thickness of 18.75 μm. The layer structure of the fifth intermediate body thus obtained is as follows.
PE/PE/PE

Next, the fourth intermediate body and the fifth intermediate body were bonded by a dry lamination method to prepare a sixth intermediate body of the laminate 50. The layer structure of the obtained sixth intermediate body was as follows.
PE/PE/PE/DL/ALM/PE/PE/PE/Contact/PE/Contact/EVOH/Contact/PE/Contact/PE/PE/PE

Next, a first printed layer 54a was formed on the first resin layer 51a of the first sealant layer 51. Then, varnish was printed on the first printed layer 54a as a protective layer 59 for protecting the first printed layer 54a. In this manner, a laminate intermediate 50a was produced. The layer structure of the obtained laminate intermediate 50a is as follows.
Varnish / Seal / PE / PE / PE / DL / ALM / PE / PE / PE / Junction / PE / Junction / EVOH / Junction / PE / Junction / PE / PE / PE

Next, the laminate intermediate 50a was embossed to produce the laminate 50. At this time, the laminate intermediate 50a, which had a length of approximately 1000 m, was embossed continuously. Furthermore, on the outer surface 501, the height H1 from the second ridge 12 to the first ridge 11 was 196.1 μm. Furthermore, on the inner surface 502, the height H2 from the second ridge 12 to the first ridge 11 was 187.7 μm.

Then, in the same manner as in Example 1, evaluations of moldability, slippage time of contents, scratch resistance, barrier properties, and loop stiffness were performed.

Example 6
First, the laminate 50 shown in Fig. 2F was produced. In this case, first, a polyethylene terephthalate film (manufactured by Toyobo Co., Ltd., EB512 (product name), thickness 12 µm) was prepared as the base layer 52. Next, a printing layer 54 was formed on the polyethylene terephthalate film.

A polyethylene terephthalate film (Tetlite EXC-B (product name), thickness 12 μm, manufactured by Oike Kogyo Co., Ltd.) with an aluminum vapor deposition layer (barrier layer 55) was prepared as the intermediate layer 58. A polyethylene film (BCO-LZ27N (product name), thickness 110 μm, manufactured by DNP Technopack Co., Ltd.) was prepared as the second sealant layer 53.

Next, the polyethylene terephthalate film for the base layer 52, the polyethylene terephthalate film for the intermediate layer 58, and the polyethylene film for the second sealant layer 53 were bonded by a dry lamination method to prepare a first intermediate body of the laminate 50. The layer structure of the obtained first intermediate body is as follows.
PET/Seal/DL/ALM/PET/DL/PE

A polyethylene film (BCO-LZ27N (product name), thickness 90 μm, manufactured by DNP Technopack Co., Ltd.) was prepared as the first sealant layer 51.

Next, the polyethylene terephthalate film for the first sealant layer 51 and the first intermediate were bonded by dry lamination to prepare the laminate intermediate 50a. The layer structure of the obtained laminate intermediate 50a is as follows.
PE/DL/PET/Mark/DL/ALM/PET/DL/PE

Next, the laminate intermediate 50a was embossed to produce the laminate 50. At this time, the laminate intermediate 50a, which had a length of approximately 1000 m, was embossed continuously. Furthermore, on the outer surface 501, the height H1 from the second ridge 12 to the first ridge 11 was 196.1 μm. Furthermore, on the inner surface 502, the height H2 from the second ridge 12 to the first ridge 11 was 187.7 μm.

Then, in the same manner as in Example 1, evaluations of moldability, slippage time of contents, scratch resistance, barrier properties, and loop stiffness were performed.

(Comparative Example 1)
Except for the fact that the laminate intermediate 50a was not embossed, the contents sliding time evaluation, scratch resistance evaluation, barrier property evaluation, and loop stiffness evaluation were performed in the same manner as in Example 1. That is, the contents sliding time evaluation, scratch resistance evaluation, barrier property evaluation, and loop stiffness evaluation were performed in the same manner as in Example 1 for the laminate intermediate 50a. The layer structure of the laminate (laminate intermediate 50a) according to Comparative Example 1 is as follows.
Varnish/mark/PE/PE/PE/AC/PET/mark/AC/bond/milky white PE/bond/ALM foil/bond/PE

(Comparative Example 2)
Except for the fact that the laminate intermediate 50a was not embossed, the contents sliding time evaluation, scratch resistance evaluation, barrier property evaluation, and loop stiffness evaluation were performed in the same manner as in Example 2. That is, the contents sliding time evaluation, scratch resistance evaluation, barrier property evaluation, and loop stiffness evaluation were performed in the same manner as in Example 2 for the laminate intermediate 50a. The layer structure of the laminate (laminate intermediate 50a) according to Comparative Example 2 is as follows.
Varnish/mark/PE/PE/AC/PET/DL/ALM/PET/AC/bonding/milky white PE/AC/bonding/ALM foil/bonding/PE/PE

(Comparative Example 3)
Except for the fact that the laminate intermediate 50a was not embossed, the contents sliding time evaluation, scratch resistance evaluation, barrier property evaluation, and loop stiffness evaluation were performed in the same manner as in Example 3. That is, the contents sliding time evaluation, scratch resistance evaluation, barrier property evaluation, and loop stiffness evaluation were performed in the same manner as in Example 3 for the laminate intermediate 50a. The layer structure of the laminate (laminate intermediate 50a) according to Comparative Example 3 is as follows.
Varnish / PE / PE / PE / AC / PET / Seal / DL / ALM / PET / DL / PE / AC / Contact / ALM foil / Contact / PE

(Comparative Example 4)
Except for the fact that the laminate intermediate 50a was not embossed, the contents sliding time evaluation, scratch resistance evaluation, barrier property evaluation, and loop stiffness evaluation were performed in the same manner as in Example 4. That is, the contents sliding time evaluation, scratch resistance evaluation, barrier property evaluation, and loop stiffness evaluation were performed in the same manner as in Example 4 for the laminate intermediate 50a. The layer structure of the laminate (laminate intermediate 50a) according to Comparative Example 4 is as follows.
PE/PE/PE/Seal/Bleached paper/Contact/ALM foil/DL/PET/AC/PE/PE

(Comparative Example 5)
Except for the fact that the laminate intermediate 50a was not embossed, the evaluation of the sliding time of the contents, the evaluation of the scratch resistance, the evaluation of the barrier property, and the evaluation of the loop stiffness were performed in the same manner as in Example 5. That is, the evaluation of the sliding time of the contents, the evaluation of the scratch resistance, the evaluation of the barrier property, and the evaluation of the loop stiffness were performed in the same manner as in Example 5. The layer structure of the laminate (laminate intermediate 50a) according to Comparative Example 5 is as follows.
Varnish / Seal / PE / PE / PE / DL / ALM / PE / PE / PE / Junction / PE / Junction / EVOH / Junction / PE / Junction / PE / PE / PE

(Comparative Example 6)
Except for the fact that the laminate intermediate 50a was not embossed, the contents sliding time evaluation, scratch resistance evaluation, barrier property evaluation, and loop stiffness evaluation were performed in the same manner as in Example 6. That is, the contents sliding time evaluation, scratch resistance evaluation, barrier property evaluation, and loop stiffness evaluation were performed in the same manner as in Example 6 for the laminate intermediate 50a. The layer structure of the laminate (laminate intermediate 50a) according to Comparative Example 6 is as follows.
PE/DL/PET/Mark/DL/ALM/PET/DL/PE

The above results are shown in Tables 1 to 5. Table 1 shows the values of height H1 and height H2 and the results of the moldability evaluation, Table 2 shows the results of the contents sliding time evaluation, Table 3 shows the results of the scratch resistance evaluation, Table 4 shows the results of the barrier property evaluation, and Table 5 shows the results of the loop stiffness evaluation.

In addition, in Table 1 above, the evaluation "◎" means that the laminate 50 was easily peeled off from the cooling roll 85 and the rubber roll 86, and no clogging or the like occurred on the surfaces of the cooling roll 85 and the rubber roll 86.

In addition, in Table 3 above, the evaluation "◎" means that the body tubes were not easily scratched even when the body tubes were rubbed strongly against each other. Also, the evaluation "○" means that the body tubes were easily scratched when the body tubes were rubbed strongly against each other, but were not easily scratched when the body tubes were rubbed weakly against each other.

As a result, as shown in Table 1, the laminates 50 of Examples 1 to 6 had good moldability during embossing.

As shown in Table 2, the laminates (intermediate laminates) according to Comparative Examples 1 to 6 had a sliding time of 90 minutes or more when the contents were treatments. On the other hand, the laminates 50 according to Examples 1 to 6 had a sliding time of 70 minutes or less when the contents were treatments. Furthermore, the laminates (intermediate laminates) according to Comparative Examples 1 to 4 and Comparative Example 6 had a sliding time of 180 minutes or more when the contents were hand cream. On the other hand, the laminates 50 according to Examples 1 to 4 and Example 6 had a sliding time of 150 minutes or less when the contents were hand cream. Furthermore, the laminates (intermediate laminates) according to Comparative Example 5 had a sliding time of 120 minutes when the contents were hand cream. On the other hand, the laminates 50 according to Example 5 had a sliding time of 60 minutes when the contents were hand cream.

As described above, it was found that the contents of the laminate 50 according to Examples 1 to 6 tend to slide off easily. Therefore, it was found that the contents of the tube container 10 using the laminate 50 according to Examples 1 to 6 can be easily removed from the tube container 10.

In addition, as shown in Table 3, in the laminates 50 according to Examples 1 to 6, even when embossed, the scratch resistance of the body tube was maintained as good as in Comparative Examples 1 to 6, which were not embossed.

As shown in Table 4, the laminates 50 according to Examples 1 to 5, even when embossed, were able to maintain good oxygen barrier properties, similar to Comparative Examples 1 to 5, which were not embossed. As shown in Table 4, the laminates 50 according to Examples 1 to 6, even when embossed, were able to maintain good water vapor barrier properties, similar to Comparative Examples 1 to 6, which were not embossed.

Furthermore, as shown in Table 5, in the laminates 50 according to Examples 1, 3 and 5, by applying embossing, the loop stiffness in the width direction (X direction) can be made significantly smaller than the loop stiffness in the flow direction (Y direction). In this way, when the loop stiffness in the width direction (X direction) is reduced, the body tube 30 can be easily crushed by the consumer's fingers when removing the contents from the tube container 10. This makes it easier to remove the contents from the tube container 10.

The components disclosed in the above embodiments may be combined as needed. Alternatively, some components may be deleted from all the components shown in the above embodiments.

REFERENCE SIGNS LIST 10 Tube container 10A Tube container with cap 11 First ridge 11a First curved line 11b Second curved line 12 Second ridge 20 Cap 30 Body tube 31 One end 32 Body seal portion 35 End 40 Head member 50 Laminate 501 Outer surface 502 Inner surface 51 First sealant layer 52 Base material layer 53 Second sealant layer 54 Printed layer 55 Barrier layer 59 Protective layer N1 Normal direction N2 Normal direction P1 First plane P2 Second plane

Claims (12)

In tube container packaging materials,
The insulating film includes a first sealant layer, a base layer, and a second sealant layer, which are arranged in this order from the first surface to the second surface,
a plurality of first ridges convex toward the first surface side and a plurality of second ridges convex toward the second surface side are formed;
in a cross section taken along a normal direction of a first plane including the plurality of first ridgelines, when a distance between the first plane including the plurality of first ridgelines and the second ridgeline is defined as a height, a height on the first surface from the second ridgeline to the first ridgeline adjacent to the second ridgeline is 0.1 mm or more and 0.5 mm or less,
in a cross section along a normal direction of a second plane including the second ridge lines, when a distance between the second plane including the second ridge lines and the first ridge line is defined as a height, a height on the second surface from the second ridge line to the first ridge line adjacent to the second ridge line is 0.1 mm or more and 0.5 mm or less,
The first edge line is
a plurality of first curves extending radially from a predetermined point so as to be convex toward one side in a predetermined direction in a plan view;
and a plurality of second curved lines extending radially from the specified point so as to be convex toward the other side in the specified direction in a plan view. The packaging material for tube containers according to claim 1, wherein each of the second ridge lines extends radially from the predetermined point in a plan view and is formed on a virtual line passing through an intersection of the first curve and the second curve. The packaging material for tube containers according to claim 1 or 2, wherein the first sealant layer includes an extrusion laminate layer or an inflation molding layer. The packaging material for tube containers according to any one of claims 1 to 3, further comprising a printing layer provided on the base layer. The packaging material for tube containers according to claim 4, wherein the first ridge line corresponds to a pattern displayed by the printing layer. The packaging material for tube containers according to any one of claims 1 to 5, further comprising a barrier layer provided between the base layer and the second sealant layer, the barrier layer being an aluminum foil. The packaging material for tube containers according to any one of claims 1 to 6, further comprising a protective layer that constitutes the first surface and protects the first sealant layer. The packaging material for tube containers according to any one of claims 1 to 7, wherein at least one of the first sealant layer, the base material layer, and the second sealant layer contains a biomass-derived component. The packaging material for tube containers according to any one of claims 1 to 7, wherein the base layer includes paper. The packaging material for tube containers according to any one of claims 1 to 9, wherein 90% by weight or more of the packaging material is made of the same material. In a tube container,
A body tube having a joint portion in which opposing ends of the tube container packaging material according to any one of claims 1 to 10 are overlapped and joined to each other;
a head member joined to one end of the body tube. In a tube container with a cap,
The tube container according to claim 11 ;
A capped tube container comprising: a cap attached to the head member.