Packaging material for tube containers, tube containers and tube containers with caps

Abstract

To provide a packaging material for tube container, a tube container and a tube container with cap having resistance to damage.SOLUTION: A packaging material for a tube container comprises a first sealant layer 51, a base material layer 52 and a second sealant layer 53 arranged in this order from an outer surface 501 to an inner surface 502. The first sealant layer 51 is made of a single layer. The first sealant layer 51 contains medium-density polyethylene and a plurality of abrasion-resistant additives added to the medium-density polyethylene.SELECTED DRAWING: Figure 2A

Description

[Technical field]

[0001] The present disclosure relates to a packaging material for tube containers, a tube container, and a tube container with a cap, and in particular to a packaging material for tube containers, a tube container, and a tube container with a cap that are less likely to be scratched even when the capped tube containers rub against each other during transportation, thereby enabling the appearance to be maintained. [Background technology]

[0002] Conventionally, a laminate constituting the body tube of a tube container has been known that has a first sealant layer, a base layer, and a second sealant layer, which are laminated in this order from the outer surface to the inner surface. The inner surface of the base layer is printed.

[0003] Incidentally, when transporting tube containers, a plurality of tube containers are stored in a cardboard box, and the cardboard box is transported as a whole.

[0004] However, the tube containers may rub against each other during transportation, causing scratches on the outer surfaces of the tube containers, which may deteriorate the appearance of the tube containers.

[0005] In addition, in conventional tube containers, the second sealant layer, which is the innermost layer, may have insufficient slipperiness, and may be scratched when the body tube is produced at high speed. When the second sealant layer, which is the innermost layer, is scratched, foreign matter caused by the scratch adheres to the sealing member, resulting in a problem of reduced bonding strength of the laminate. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2005-178851 A Summary of the Invention [Problem to be solved by the invention]

[0007] The present 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 are resistant to scratches. [Means for solving the problem]

[0008] A packaging material for tube containers according to one embodiment comprises a first sealant layer, a base material layer, and a second sealant layer arranged in that order from the outer surface to the inner surface, the first sealant layer being a single layer, and the first sealant layer contains medium-density polyethylene and multiple types of wear-resistant additives added to the medium-density polyethylene.

[0009] In one embodiment, the content of the wear resistance additive in the first sealant layer may be 0.01% by weight or more and 10% by weight or less.

[0010] In one embodiment of the packaging material for tube containers, the second sealant layer is a single layer, and the second sealant layer may contain medium density polyethylene and multiple types of wear-resistant additives added to the medium density polyethylene.

[0011] A packaging material for tube containers according to one embodiment comprises a first sealant layer, a base material layer, and a second sealant layer arranged in that order from the outer surface to the inner surface, the second sealant layer being a single layer, and the second sealant layer contains medium density polyethylene and multiple types of wear-resistant additives added to the medium density polyethylene.

[0012] In one embodiment, the second sealant layer may have a content of the wear resistance additive of 0.01% by weight or more and 10% by weight or less.

[0013] A packaging material for tube containers according to one embodiment comprises a first sealant layer, a base material layer, and a second sealant layer arranged in that order from the outer surface to the inner surface, the first sealant layer having a plurality of layers, and of the plurality of layers of the first sealant layer, the outermost layer constituting the outer surface contains medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene.

[0014] In one embodiment, the outermost layer of the tube container packaging material may have a content of the anti-wear additive of 0.01% by weight or more and 10% by weight or less.

[0015] In one embodiment, the content of the wear resistance additive in the first sealant layer may be 0.0021% by weight or more and 2.5% by weight or less.

[0016] In one embodiment of the packaging material for tube containers, the second sealant layer has a plurality of layers, and among the plurality of layers of the second sealant layer, the innermost layer constituting the inner surface may contain medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene.

[0017] A packaging material for tube containers according to one embodiment comprises a first sealant layer, a base layer, and a second sealant layer arranged in that order from the outer surface to the inner surface, the second sealant layer having a plurality of layers, and of the plurality of layers of the second sealant layer, the innermost layer constituting the inner surface contains medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene.

[0018] In one embodiment, the content of the wear resistance additive in the innermost layer may be 0.01% by weight or more and 10% by weight or less.

[0019] In one embodiment, the second sealant layer may have a content of the anti-wear additive of 0.0021% by weight or more and 2.5% by weight or less.

[0020] In one embodiment of the tube container packaging material, the wear-resistant additive may include an acrylic resin and erucamide.

[0021] A tube container according to one embodiment is a tube container comprising a body tube formed by overlapping and joining opposing edges of a tube container packaging material according to one embodiment, and a head member joined to one end of the body tube.

[0022] A tube container with a cap according to one embodiment is a tube container with a cap, comprising the tube container according to one embodiment and a cap attached to the head member. Effect of the Invention

[0023] According to the present disclosure, it is possible to make a capped tube container less susceptible to scratches. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a partial vertical sectional view showing a capped tube container according to this embodiment filled with contents. [Figure 2A] FIG. 2A is a cross-sectional view showing an example of a layer structure of the laminate according to the present embodiment. [Figure 2B] FIG. 2B is a cross-sectional view showing another example of the layer structure of the laminate according to the present embodiment. [Figure 2C] FIG. 2C is a cross-sectional view showing another example of the layer structure of the laminate according to the present embodiment. [Figure 2D] FIG. 2D is a cross-sectional view showing another example of the layer structure of the laminate according to the present embodiment. [Figure 2E] FIG. 2E is a cross-sectional view showing another example of the layer structure of the laminate according to the present embodiment. [Figure 2F] FIG. 2F is a cross-sectional view showing another example of the layer structure of the laminate according to the present embodiment. [Figure 2G] FIG. 2G is a cross-sectional view showing another example of the layer structure of the laminate according to the present embodiment. [Figure 2H] FIG. 2H is a cross-sectional view showing another example of the layer structure of the laminate according to the present embodiment. [Figure 2I] FIG. 2I is a cross-sectional view showing another example of the layer structure of the laminate according to the present embodiment. [Figure 2J] FIG. 2J is a cross-sectional view showing another example of the layer structure of the laminate according to the present embodiment. [Diagram 3] 3(a)-(c) are schematic diagrams showing a method for manufacturing a tube container according to this embodiment. [Figure 4] FIG. 4 is a perspective view showing a method for manufacturing a tube container according to this embodiment. [Diagram 5] FIG. 5 is a partial vertical sectional view showing a method for producing a capped tube container according to this embodiment. [Figure 6] FIG. 6 is a diagram showing a state in which a capped tube container according to this embodiment is being transported. [Figure 7] FIG. 7 is a diagram for explaining a method for measuring the area of ​​scratches in the transportation test of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] An embodiment will be described below with reference to the drawings. FIGS. 1 to 6 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, it is possible to carry out appropriate modifications within the scope of the technical idea. 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 the 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 appropriately selected and used. In this specification, terms that specify shapes and geometric conditions, such as parallel, orthogonal, and vertical, are intended to include substantially the same state in addition to their strict meanings.

[0026] First, with reference to FIG. 1, a capped tube container 10A produced using a laminate (tube container packaging material) 50 according to the present embodiment will be described.

[0027] As shown in FIG. 1, a capped tube container 10A according to 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.

[0028] Of these, 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 .

[0029] First, the head member 40 of the tube container 10 will be described.

[0030] 1, the head member 40 has a shoulder portion 41 and a mouth portion 42. Of these, the mouth portion 42 is adapted to have the cap 20 attached thereto.

[0031] Such a head member 40 is molded, for example, by compression molding, as described later. The head member 40 is made of a resin material, for example, high density polyethylene (HDPE).

[0032] Next, the body tube 30 of the tube container 10 will be described. The body tube 30 shown in FIG. 1 has a generally cylindrical shape. The body tube 30 is composed of a laminated laminate 50 (see FIGS. 2A to 2J), which is rolled into a cylindrical shape, and the opposing edges 35 (see FIG. 4) are overlapped and joined together, for example, by heat sealing. Therefore, the body tube 30 has a body seal portion 32 in which the laminates 50 are joined together along the longitudinal direction. In addition, the other end 33 of the body tube 30 has a bottom seal portion 34 in which the laminates 50 are joined together. This bottom seal portion 34 is formed by filling an appropriate amount of, for example, toothpaste or other contents C from an opening 50B (see FIG. 4) formed at the other end of the body tube 30, and then joining the laminates 50 near the opening 50B together.

[0033] Next, a description will be given of the layer structure of the laminate 50. Figures 2A to 2J show an example of the layer structure of the laminate 50 constituting the body tube 30. As shown in Figures 2A to 2J, 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 an outer surface 501 to an inner surface 502.

[0034] 2A , the laminate 50 includes, in this order from an outer surface 501 to an inner surface 502, a first sealant layer 51, a first adhesive layer 54a, a base layer 52, a printed layer 55, a second adhesive layer 54b, and a second sealant layer 53. Of these, the first sealant layer 51 forms the outer surface of the body tube 30, and the second sealant layer 53 forms the inner surface of the body tube 30.

[0035] In the example shown in FIG. 2A, the first sealant layer 51 is a single layer. However, this is not limited thereto, and the first sealant layer 51 may have a plurality of layers as shown in FIG. 2B and FIG. 2C. For example, as shown in FIG. 2B, the first sealant layer 51 may have a first resin layer 51a, a second resin layer 51b, and a third resin layer 51c from the outer surface 501 toward the inner surface 502. Also, as shown in FIG. 2C, the first sealant layer 51 may have a first resin layer 51a, a second resin layer 51b, a third resin layer 51c, a fourth resin layer 51d, and a fifth resin layer 51e from the outer surface 501 toward the inner surface 502. In these cases, the first resin layer 51a of the first sealant layer 51 becomes the outermost layer constituting the outer surface of the body tube 30. Although not shown, the first sealant layer 51 may be made of two layers, or may have six or more layers.

[0036] In the example shown in FIG. 2A, the second sealant layer 53 is a single layer. However, this is not limited thereto, and the second sealant layer 53 may have a plurality of layers as shown in FIG. 2D and FIG. 2E. For example, as shown in FIG. 2D, the second sealant layer 53 may have a first resin layer 53a, a second resin layer 53b, and a third resin layer 53c from the outer surface 501 toward the inner surface 502. In this case, the third resin layer 53c of the second sealant layer 53 becomes the innermost layer constituting the inner surface of the body tube 30. For example, as shown in FIG. 2E, the second sealant layer 53 may have a first resin layer 53a, a second resin layer 53b, a third resin layer 53c, a fourth resin layer 53d, and a fifth resin layer 53e from the outer surface 501 toward the inner surface 502. In this case, the fifth resin layer 53e of the second sealant layer 53 becomes the innermost layer constituting the inner surface of the body tube 30. Although not shown, the second sealant layer 53 may be made up of two layers, or may have six or more layers. Although not shown, each of the first sealant layer 51 and the second sealant layer 53 may have multiple layers.

[0037] 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 54a, a base layer 52, a printed layer 55, a second adhesive layer 54b, a barrier layer 56, an intermediate layer 57, a third adhesive layer 54c, and a second sealant layer 53. Of these, the first sealant layer 51 forms the outer surface of the body tube 30, and the second sealant layer 53 forms the inner surface of the body tube 30.

[0038] In the example shown in FIG. 2F, the first sealant layer 51 is a single layer. However, this is not limited thereto, and the first sealant layer 51 may have a plurality of layers as shown in FIG. 2G and FIG. 2H. For example, as shown in FIG. 2G, the first sealant layer 51 may have a first resin layer 51a, a second resin layer 51b, and a third resin layer 51c from the outer surface 501 toward the inner surface 502. Also, as shown in FIG. 2H, the first sealant layer 51 may have a first resin layer 51a, a second resin layer 51b, a third resin layer 51c, a fourth resin layer 51d, and a fifth resin layer 51e from the outer surface 501 toward the inner surface 502. In these cases, the first resin layer 51a of the first sealant layer 51 becomes the outermost layer constituting the outer surface of the body tube 30. Although not shown, the first sealant layer 51 may be made of two layers, or may have six or more layers.

[0039] In the example shown in FIG. 2F, the second sealant layer 53 is a single layer. However, this is not limited thereto, and the second sealant layer 53 may have a plurality of layers as shown in FIG. 2I and FIG. 2J. For example, as shown in FIG. 2I, the second sealant layer 53 may have a first resin layer 53a, a second resin layer 53b, and a third resin layer 53c from the outer surface 501 toward the inner surface 502. In this case, the third resin layer 53c of the second sealant layer 53 becomes the innermost layer constituting the inner surface of the body tube 30. For example, as shown in FIG. 2J, the second sealant layer 53 may have a first resin layer 53a, a second resin layer 53b, a third resin layer 53c, a fourth resin layer 53d, and a fifth resin layer 53e from the outer surface 501 toward the inner surface 502. In this case, the fifth resin layer 53e of the second sealant layer 53 becomes the innermost layer constituting the inner surface of the body tube 30. Although not shown, the second sealant layer 53 may be made up of two layers, or may have six or more layers. Although not shown, each of the first sealant layer 51 and the second sealant layer 53 may have multiple layers.

[0040] Each layer of the laminate 50 will now be described.

[0041] First Sealant Layer The first sealant layer 51 is a layer for bonding the laminates 50 together, and the material constituting the first sealant layer 51 is a material that melts and fuses when heated.

[0042] (First Configuration of First Sealant Layer) The first sealant layer 51 according to the first configuration is a single layer, as shown in FIG. 2A and the like. In this case, the first sealant layer 51 contains medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene. The first sealant layer 51 contains medium density polyethylene, so that the density of the first sealant layer 51 can be increased. Therefore, the rigidity of the first sealant layer 51 can be increased, and the slipperiness of the first sealant layer 51 can be easily improved. This can improve the wear resistance of the first sealant layer 51. In addition, the first sealant layer 51 contains medium density polyethylene, so that the density of the first sealant layer 51 can be prevented from becoming too high, and the bondability between the first sealant layer 51 and the second sealant layer 53 can be prevented from decreasing. In addition, the first sealant layer 51 contains a plurality of types of wear-resistant additives, so that the wear resistance of the first sealant layer 51 can be improved. In this way, the first sealant layer 51 contains medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene, and thus the wear resistance of the first sealant layer 51 can be improved. This improves the wear resistance of the body tube 30. As a result, even if the body tubes 30 rub against each other, scratches on the outer surface of the body tube 30 can be suppressed, and the appearance of the capped tube container 10A and the tube container 10 can be maintained. In this specification, "medium density polyethylene" refers to a polyethylene having a density of 930 kg / m 3 More than 942kg / m 3 The medium density polyethylene may be a biomass-derived medium density polyethylene.

[0043] In addition, the content of the wear-resistant additive in the first sealant layer 51 is preferably 0.01% by weight or more and 10% by weight or less. When the content of the wear-resistant additive is 0.01% by weight or more, the wear resistance of the first sealant layer 51 can be improved. When the content of the wear-resistant additive is 10% by weight or less, the components of the wear-resistant additive can be prevented from seeping out from the outer surface 501 of the laminate 50. This can prevent the bonding between the first sealant layer 51 and the second sealant layer 53 from decreasing. In this specification, the "content of the wear-resistant additive" means the total content of multiple types of wear-resistant additives.

[0044] Here, as the wear-resistant additive, an acrylic resin, erucic acid amide, ethylene-1-hexene copolymer, slip agent, or the like can be used. In this embodiment, the wear-resistant additive preferably contains an acrylic resin and erucic acid amide. In this case, the acrylic resin serves as a so-called anti-blocking agent. Since the first sealant layer 51 contains an acrylic resin as an anti-blocking agent, the slipperiness of the first sealant layer 51 can be improved. Furthermore, since the wear-resistant additive contains erucic acid amide, the slipperiness of the outer surface 501 of the laminate 50 can be more effectively improved. Thus, since the wear-resistant additive contains an acrylic resin and erucic acid amide, the first sealant layer 51 can have excellent wear resistance. Therefore, it is possible to suppress the occurrence of scratches on the laminate 50. In addition, in the first sealant layer 51, the content of the acrylic resin and the content of the erucic acid amide may be equal to each other or may be different from each other. Furthermore, the wear-resistant additive may contain a resin other than an acrylic resin that serves as an anti-blocking agent.

[0045] The film or the like constituting the first sealant layer 51 can be made, for example, by using medium-density polyethylene as the main component to which an abrasion-resistant additive is added to prepare a resin composition, and then using the resin composition prepared above, for example, it can be molded using a T-die method, an inflation method, or other molding method.

[0046] In the present embodiment, the thickness of the first sealant layer 51 is preferably not less than 50 μm and not more than 250 μm.

[0047] (Second Configuration of First Sealant Layer) The first sealant layer 51 according to the second configuration has a plurality of layers as shown in FIG. 2B and FIG. 2C. In this case, the first resin layer (outermost layer) 51a constituting the outer surface of the plurality of layers contains medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene. Even in this case, the wear resistance of the body tube 30 can be improved, so that even if the body tubes 30 rub against each other, the outer surface of the body tube 30 can be prevented from being scratched. Therefore, the appearance of the capped tube container 10A and the tube container 10 can be maintained. Also in this case, since the first resin layer 51a contains medium density polyethylene, it is possible to prevent the density of the first sealant layer 51 from becoming too high, and it is possible to prevent the bondability between the first sealant layer 51 and the second sealant layer 53 from decreasing.

[0048] Here, the present inventors conducted intensive research and found that when the first sealant layer 51 has multiple layers, the content of the wear-resistant additive in the first resin layer 51a, which is the outermost layer, significantly affects the wear resistance of the first sealant layer 51. For this reason, it was found that by increasing the amount of the wear-resistant additive contained in the first resin layer 51a, the wear resistance of the first sealant layer 51 can be improved even when the amount of the wear-resistant additive contained in the first sealant layer 51 is reduced compared to when the first sealant layer 51 is a single layer. In this case, it was found that the manufacturing cost of the laminate 50 can be reduced.

[0049] In this way, when the first sealant layer 51 has a plurality of layers, the content of the wear resistance additive in the first resin layer (outermost layer) 51a is preferably 0.01% by weight or more and 10% by weight or less. When the content of the wear resistance additive is 0.01% by weight or more, the wear resistance of the first resin layer 51a can be improved. Therefore, the wear resistance of the first sealant layer 51 can be improved. Furthermore, when the content of the wear resistance additive is 10% by weight or less, the components of the wear resistance additive can be prevented from seeping out from the outer surface 501 of the laminate 50. This can prevent the bond between the first sealant layer 51 and the second sealant layer 53 from decreasing.

[0050] In this case, the content of the wear-resistant additive in the first sealant layer 51 is preferably 0.0021% by weight or more and 2.5% by weight or less. When the content of the wear-resistant additive is 0.0021% by weight or more, the wear resistance of the first sealant layer 51 can be improved. When the content of the wear-resistant additive is 2.5% by weight or less, the components of the wear-resistant additive can be prevented from seeping out from the outer surface 501 of the laminate 50. This can prevent the bonding between the first sealant layer 51 and the second sealant layer 53 from decreasing.

[0051] Here, as shown in FIG. 2B and FIG. 2G, when the first sealant layer 51 has three layers (the first resin layer 51a, the second resin layer 51b, and the third resin layer 51c), the content of the wear-resistant additive in the first sealant layer 51 is more preferably 0.0025% by weight or more and 2.5% by weight or less. In this case, for example, when the ratio of the thickness of the first resin layer 51a to the thickness of the second resin layer 51b to the thickness of the third resin layer 51c is approximately 1.0:2.0:1.0, and the second resin layer 51b and the third resin layer 51c each contain the same medium-density polyethylene as the first resin layer 51a, the content of the wear-resistant additive in the first resin layer (outermost layer) 51a can be 0.01% by weight or more and 10% by weight or less. Therefore, by having the content of the wear-resistant additive be 0.0025% by weight or more, the wear resistance of the first sealant layer 51 can be effectively improved. Furthermore, by having the content of the wear-resistant additive be 2.5 weight % or less, the components of the wear-resistant additive can be effectively prevented from seeping out from the outer surface 501 of the laminate 50, and a decrease in the bonding strength between the first sealant layer 51 and the second sealant layer 53 can be effectively prevented.

[0052] In this case, the thickness T1 (see FIG. 2B) of the first resin layer 51a may be 12.5 μm or more and 62.5 μm or less. The thickness T2 of the second resin layer 51b may be 25.0 μm or more and 125 μm or less. Furthermore, the thickness T3 of the third resin layer 51c may be 12.5 μm or more and 62.5 μm or less. In this case, the ratio (T1:T2:T3) of the thickness T1 of the first resin layer 51a to the thickness T2 of the second resin layer 51b to the thickness T3 of the third resin layer 51c may be, for example, 1.0:2.0:1.0.

[0053] On the other hand, when the first sealant layer 51 has five layers (first resin layer 51a, second resin layer 51b, third resin layer 51c, fourth resin layer 51d and fifth resin layer 51e) as shown in Figures 2C and 2H, it is more preferable that the content of the wear resistance additive in the first sealant layer 51 be 0.0021 weight % or more and 2.14 weight % or less. In this case, for example, when the ratio of the thickness of the first resin layer 51a to the thickness of the second resin layer 51b to the thickness of the third resin layer 51c to the thickness of the fourth resin layer 51d to the thickness of the fifth resin layer 51e is approximately 1.2:1.0:1.2:1.0:1.2, and the second resin layer 51b, the third resin layer 51c, the fourth resin layer 51d, and the fifth resin layer 51e each contain the same medium-density polyethylene as the first resin layer 51a, the content of the wear-resistant additive in the first resin layer (outermost layer) 51a can be 0.01% by weight or more and 10% by weight or less. Therefore, by having the content of the wear-resistant additive be 0.0021% by weight or more, the wear resistance of the first sealant layer 51 can be effectively improved. Furthermore, by having the content of the wear-resistant additive be 2.14 weight % or less, the components of the wear-resistant additive can be effectively prevented from seeping out from the outer surface 501 of the laminate 50, and a decrease in the bonding strength between the first sealant layer 51 and the second sealant layer 53 can be effectively prevented.

[0054] In this case, the thickness T11 (see FIG. 2C) of the first resin layer 51a is preferably 13.2 μm or more and 66 μm or less. The thickness T12 of the second resin layer 51b is preferably 11 μm or more and 55 μm or less. The thickness T13 of the third resin layer 51c is preferably 13.2 μm or more and 66 μm or less. The thickness T14 of the fourth resin layer 51d is preferably 11 μm or more and 55 μm or less. Furthermore, the thickness T15 of the fifth resin layer 51e is preferably 13.2 μm or more and 66 μm or less. In this case, the ratio (T1:T2:T3:T4:T5) of the thickness T11 of the first resin layer 51a, the thickness T12 of the second resin layer 51b, the thickness T13 of the third resin layer 51c, the thickness T14 of the fourth resin layer 51d, and the thickness T15 of the fifth resin layer 51e may be, for example, 1.2:1.0:1.2:1.0:1.2.

[0055] In the first sealant layer 51 according to the second configuration, the material constituting the layers other than the first resin layer (outermost layer) 51a constituting the outer surface may be a material that melts and fuses by heat. As the layers other than the first resin layer 51a, for example, a resin made of one or more of polyolefin resins such as polyethylene or polypropylene, acid-modified polyolefin resins obtained by modifying olefin resins 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, polyvinyl alcohol, and other resins can be used. As the polyolefin resin, for example, low-density polyethylene, medium-density polyethylene, and high-density polyethylene can be used. In this specification, "low-density polyethylene" refers to polyethylene having a density of 910 kg / m 3 More than 930kg / m 3 "High density polyethylene" means polyethylene with a density of 942 kg / m 3 The polyethylene may be a biomass-derived polyethylene.

[0056] The other configurations of the first sealant layer 51 according to the second configuration are similar to those of the first sealant layer 51 according to the first configuration, and therefore detailed description thereof will be omitted here.

[0057] (Third Configuration of First Sealant Layer) The first sealant layer 51 according to the third configuration may be a single layer or may have multiple layers. In this case, the first sealant layer 51 may or may not contain an anti-wear additive.

[0058] The material constituting the first sealant layer 51 according to the third configuration may be any material that melts and fuses with heat. For example, a polyolefin film may be used for the first sealant layer 51. More specifically, for example, a polyethylene film such as a medium density polyethylene film, a polypropylene film, an acid-modified polyolefin resin film obtained by modifying a polyolefin resin such as polyethylene or polypropylene with acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, or other unsaturated carboxylic acid, a polyvinyl acetate resin film, a polyester resin film, a polystyrene resin film, a film made of one or more of other resins such as polyacrylonitrile, saturated polyester, and polyvinyl alcohol may be used for the first sealant layer 51. When the first sealant layer 51 contains polyethylene, the polyethylene may be a polyethylene derived from biomass.

[0059] It is preferable that the first sealant layer 51 contains medium density polyethylene. When the first sealant layer 51 contains medium density polyethylene, the bonding strength between the first sealant layer 51 and the second sealant layer 53 can be improved when the first sealant layer 51 and the second sealant layer 53 are bonded to each other.

[0060] The other configuration of the first sealant layer 51 according to the third configuration is similar to the configuration of the first sealant layer 51 according to the first configuration, and therefore a detailed description thereof will be omitted here.

[0061] Base material layer The base 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. Examples of materials that can be used for the base layer 52 include films or sheets of polyester resins, polyamide resins, polyaramid resins, polyolefin resins, polycarbonate resins, polyacetal resins, fluorine resins, and other tough resins. As an example, the base layer 52 may contain polyethylene terephthalate. When the base layer 52 contains polyethylene terephthalate, the polyethylene terephthalate may be biomass-derived polyethylene terephthalate.

[0062] As the above-mentioned resin film or sheet, any of unstretched films, uniaxially or biaxially stretched films, etc. can be used. Among them, in the present embodiment, a biaxially stretched polyester resin film is preferred because of its excellent printability.

[0063] In the present embodiment, the thickness of the base layer 52 is preferably not less than 10 μm and not more than 25 μm.

[0064] Second Sealant Layer The second sealant layer 53 is a layer for bonding the laminates 50 together, and the material constituting the second sealant layer 53 is a material that melts and fuses when heated.

[0065] (First Configuration of Second Sealant Layer) The second sealant layer 53 according to the first configuration is a single layer, as shown in FIG. 2A and the like. In this case, the second sealant layer 53 contains medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene. The second sealant layer 53 contains medium density polyethylene, so that the density of the second sealant layer 53 can be increased. Therefore, the rigidity of the second sealant layer 53 can be increased, and the slipperiness of the second sealant layer 53 can be easily improved. This makes it possible to make the second sealant layer 53 less susceptible to scratches. In addition, the second sealant layer 53 contains medium density polyethylene, so that the density of the second sealant layer 53 can be prevented from becoming too high, and the bondability between the first sealant layer 51 and the second sealant layer 53 can be prevented from decreasing. In addition, the second sealant layer 53 contains a plurality of types of wear-resistant additives, so that the wear resistance of the second sealant layer 53 can be improved.

[0066] In this way, the second sealant layer 53 contains medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene, and thus the slipperiness and wear resistance of the second sealant layer 53 can be improved. Therefore, as described below, when the laminate 50 is wrapped around the inner seal member 80 described below, the second sealant layer 53 can be prevented from being scratched. In addition, since the second sealant layer 53 can be prevented from being scratched, foreign matter caused by scratches on the second sealant layer 53 can be prevented from adhering to the inner seal member 80 described below.

[0067] In addition, the content of the wear-resistant additive in the second sealant layer 53 is preferably 0.01% by weight or more and 10% by weight or less. When the content of the wear-resistant additive is 0.01% by weight or more, the slipperiness and wear resistance of the second sealant layer 53 can be improved. When the content of the wear-resistant additive is 10% by weight or less, the second sealant layer 53 can be easily produced so that the thickness of the second sealant layer 53 is approximately uniform when the laminate 50 is produced. When the content of the wear-resistant additive is 10% by weight or less, the heat sealability can be suppressed from decreasing when the laminate 50 is joined by heat sealing, as described below.

[0068] The other configuration of the second sealant layer 53 according to the first configuration is similar to the configuration of the first sealant layer 51 according to the first configuration, and therefore a detailed description thereof will be omitted here.

[0069] (Second Configuration of Second Sealant Layer) The second sealant layer 53 according to the second configuration has a plurality of layers, as shown in FIG. 2D and FIG. 2E, etc. In this case, in the example shown in FIG. 2D and FIG. 2I, the third resin layer (innermost layer) 53c constituting the inner surface of the plurality of layers contains medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene. In addition, in the example shown in FIG. 2E and FIG. 2J, the fifth resin layer (innermost layer) 53e constituting the inner surface of the plurality of layers contains medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene. Even in this case, the slipperiness and wear resistance of the second sealant layer 53 can be improved. Therefore, as described later, when the laminate 50 is wound around the inner seal member 80 described later, it is possible to suppress the occurrence of scratches on the second sealant layer 53. In addition, since it is possible to suppress the occurrence of scratches on the second sealant layer 53, it is possible to suppress the adhesion of foreign matter caused by scratches on the second sealant layer 53 to the inner seal member 80 described later.

[0070] Here, the inventors of the present invention have conducted intensive research and found that when the second sealant layer 53 has multiple layers, the content of the wear-resistant additive in the third resin layer 53c or the fifth resin layer 53e, which is the innermost layer, greatly affects the slipperiness and wear resistance of the second sealant layer 53. Therefore, it was found that by increasing the amount of the wear-resistant additive contained in the third resin layer 53c or the fifth resin layer 53e, which is the innermost layer, the slipperiness and wear resistance of the second sealant layer 53 can be improved even when the amount of the wear-resistant additive contained in the second sealant layer 53 is reduced compared to when the second sealant layer 53 is a single layer. In this case, it was found that the manufacturing cost of the laminate 50 can be reduced.

[0071] In this way, when the second sealant layer 53 has a plurality of layers, the content of the wear-resistant additive in the third resin layer (innermost layer) 53c or the fifth resin layer (innermost layer) 53e is preferably 0.01% by weight or more and 10% by weight or less. When the content of the wear-resistant additive is 0.01% by weight or more, the slipperiness and wear resistance of the second sealant layer 53 can be improved. When the content of the wear-resistant additive is 10% by weight or less, the second sealant layer 53 can be easily produced so that the thickness of the second sealant layer 53 is approximately uniform when the laminate 50 is produced. When the content of the wear-resistant additive is 10% by weight or less, the heat sealability can be suppressed from decreasing when the laminate 50 is joined by heat sealing, as described later.

[0072] In this case, the content of the wear-resistant additive in the second sealant layer 53 is preferably 0.0021% by weight or more and 2.5% by weight or less. When the content of the wear-resistant additive is 0.0021% by weight or more, the slipperiness and wear resistance of the second sealant layer 53 can be improved. When the content of the wear-resistant additive is 2.5% by weight or less, the second sealant layer 53 can be easily produced so that the thickness of the second sealant layer 53 is approximately uniform when the laminate 50 is produced. When the content of the wear-resistant additive is 2.5% by weight or less, the heat sealability can be suppressed from decreasing when the laminate 50 is joined by heat sealing, as described below.

[0073] 2D and 2I, when the second sealant layer 53 has three layers (first resin layer 53a, second resin layer 53b, and third resin layer 53c), the content of the wear-resistant additive in the second sealant layer 53 is more preferably 0.0025% by weight or more and 2.5% by weight or less. In this case, for example, when the ratio of the thickness of the first resin layer 53a to the thickness of the second resin layer 53b to the thickness of the third resin layer 53c is approximately 1.0:2.0:1.0, and the first resin layer 53a and the second resin layer 53b each contain the same medium-density polyethylene as the third resin layer 53c, the content of the wear-resistant additive in the third resin layer (innermost layer) 53c can be 0.01% by weight or more and 10% by weight or less. Therefore, by making the content of the wear-resistant additive 0.0025% by weight or more, it is possible to effectively improve the slipperiness and wear resistance of the second sealant layer 53. Furthermore, by making the content of the wear-resistant additive 2.5% by weight or less, it is possible to easily make the second sealant layer 53 so that the thickness of the second sealant layer 53 is approximately uniform when making the laminate 50. Furthermore, by making the content of the wear-resistant additive 2.5% by weight or less, it is possible to suppress a decrease in heat sealability when the laminate 50 is joined by heat sealing, as described below.

[0074] In this case, the thickness t1 (see FIG. 2D) of the first resin layer 53a may be 12.5 μm or more and 62.5 μm or less. The thickness t2 of the second resin layer 53b may be 25.0 μm or more and 125 μm or less. Furthermore, the thickness t3 of the third resin layer 53c may be 12.5 μm or more and 62.5 μm or less. In this case, the ratio (t1:t2:t3) of the thickness t1 of the first resin layer 53a to the thickness t2 of the second resin layer 53b to the thickness t3 of the third resin layer 53c may be, for example, 1.0:2.0:1.0.

[0075] On the other hand, when the second sealant layer 53 has five layers (a first resin layer 53a, a second resin layer 53b, a third resin layer 53c, a fourth resin layer 53d and a fifth resin layer 53e) as shown in Figures 2E and 2J, it is more preferable that the content of the wear resistance additive in the second sealant layer 53 be 0.0021 weight % or more and 2.14 weight % or less. In this case, for example, when the ratio of the thickness of the first resin layer 53a to the thickness of the second resin layer 53b to the thickness of the third resin layer 53c to the thickness of the fourth resin layer 53d to the thickness of the fifth resin layer 53e is approximately 1.2:1.0:1.2:1.0:1.2, and the first resin layer 53a, the second resin layer 53b, the third resin layer 53c, and the fourth resin layer 53d each contain the same medium-density polyethylene as the fifth resin layer 53e, the content of the wear-resistant additive in the fifth resin layer (innermost layer) 53e can be 0.01% by weight or more and 10% by weight or less. Therefore, by having the content of the wear-resistant additive be 0.0021% by weight or more, the slipperiness and wear resistance of the second sealant layer 53 can be effectively improved. Furthermore, since the content of the wear-resistant additive is 2.14% by weight or less, the second sealant layer 53 can be easily produced so that the thickness of the second sealant layer 53 is approximately uniform when producing the laminate 50. Furthermore, since the content of the wear-resistant additive is 2.14% by weight or less, it is possible to suppress a decrease in heat sealability when the laminate 50 is joined by heat sealing, as described below.

[0076] In this case, the thickness t11 (see FIG. 2E) of the first resin layer 53a is preferably 13.2 μm or more and 66 μm or less. The thickness t12 of the second resin layer 53b is preferably 11 μm or more and 55 μm or less. The thickness t13 of the third resin layer 53c is preferably 13.2 μm or more and 66 μm or less. The thickness t14 of the fourth resin layer 53d is preferably 11 μm or more and 55 μm or less. Furthermore, the thickness t15 of the fifth resin layer 53e is preferably 13.2 μm or more and 66 μm or less. In this case, the ratio (t1:t2:t3:t4:t5) of the thickness t11 of the first resin layer 53a, the thickness t12 of the second resin layer 53b, the thickness t13 of the third resin layer 53c, the thickness t14 of the fourth resin layer 53d, and the thickness t15 of the fifth resin layer 53e may be, for example, 1.2:1.0:1.2:1.0:1.2.

[0077] Other configurations of the second sealant layer 53 according to the second configuration are similar to those of the first sealant layer 51 according to the second configuration, and therefore detailed description thereof will be omitted here.

[0078] (Third Configuration of Second Sealant Layer) The second sealant layer 53 according to the third configuration may be a single layer or may have multiple layers. In this case, the second sealant layer 53 may or may not contain an anti-wear additive.

[0079] The other configuration of the second sealant layer 53 according to the third configuration is similar to the configuration of the first sealant layer 51 according to the third configuration, so a detailed description thereof will be omitted here.

[0080] Here, at least one of the second sealant layer 53 and the above-mentioned first sealant layer 51 is selected to have the first configuration or the second configuration. Examples of combinations of materials constituting the first sealant layer 51 and the second sealant layer are summarized in Table 1.

[0081] [Table 1]

[0082] adhesive layer The adhesive layers, such as the first adhesive layer 54a, the second adhesive layer 54b, and the third adhesive layer 54c, are layers for bonding the first sealant layer 51, the base material layer 52, the intermediate layer 57, the second sealant layer 53, etc. to one another. These adhesive layers can be appropriately selected depending on the resin that constitutes the layers to be bonded.

[0083] As the adhesive layer, for example, an anchor coating agent such as an isocyanate-based (urethane-based), polyethyleneimine-based, polybutadiene-based, or organic titanium-based, or a polyurethane-based, polyacrylic-based, polyester-based, epoxy-based, polyvinyl acetate-based, cellulose-based, or other laminating adhesive can be arbitrarily used.

[0084] As the adhesive layer, for example, polyethylene, polypropylene, polyethylene, ethylene-vinyl alcohol, ethylene-methacrylic acid copolymer (EMAA), ethylene-acrylic acid copolymer, ionomer, maleic anhydride modified polyolefin resin, etc. can be suitably used.

[0085] In the present embodiment, the thickness of the adhesive layer is preferably not less than 3 μm and not more than 60 μm.

[0086] The first sealant layer 51, the base layer 52, the intermediate layer 57, the second sealant layer 53, etc. may be laminated together by any method, such as wet lamination, dry lamination, solventless dry lamination, extrusion lamination, T-die coextrusion molding, coextrusion lamination, inflation, or any other method. When carrying out the above-mentioned lamination, the film may be subjected to a pretreatment, such as a corona treatment or an ozone treatment, if necessary.

[0087] printing layer The printed layer 55 is a layer on which a pattern or the like is printed, and is a layer for improving the design of the laminate 50. The printed layer 55 may be an ink composition obtained by adjusting an ink composition by adding one or more of ordinary ink vehicles as the main component, optionally adding one or more of plasticizers, stabilizers, antioxidants, light stabilizers, ultraviolet absorbers, curing agents, crosslinking agents, lubricants, antistatic agents, fillers, and other additives as necessary, and further adding a colorant such as a dye or pigment, and thoroughly kneading with a solvent, a diluent, and the like. Examples of such ink vehicles include linseed oil, tung oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin-modified resin, shellac, alkyd resin, phenolic resin, maleic acid resin, natural resin, hydrocarbon resin, polyvinyl chloride resin, polyacetic acid resin, polystyrene resin, polyvinyl butyral resin, acrylic or methacrylic resin, polyamide resin, polyester resin, polyurethane resin, epoxy resin, urea resin, melamine resin, aminoalkyd resin, nitrocellulose, ethylcellulose, chlorinated rubber, cyclized rubber, and others, and one or more of these may be used in combination. The printing method may be gravure printing, letterpress printing, screen printing, transfer printing, flexographic printing, or other printing methods.

[0088] Barrier Layer The barrier layer 56 is a layer for suppressing the transmission of oxygen gas, water vapor, and the like. For example, a gas barrier material against oxygen gas, water vapor, and the like, a light-shielding material against sunlight, and a material having aroma retention properties for the contents can be used as the barrier layer 56. Specifically, for example, aluminum foil, tin, lead, copper, iron, nickel, or alloys thereof, or a thin layer of a metal such as aluminum can be used as the barrier layer 56. When aluminum foil is used as the barrier layer 56, the thickness of the barrier layer 56 can be about 5 μm or more and 20 μm or less.

[0089] Furthermore, when a vapor-deposited layer of a metal such as aluminum is used as the barrier layer 56, a vapor-deposited thin film of a metal such as aluminum can be formed on the intermediate layer 57 by using a physical vapor deposition method (PVD method) such as a vacuum deposition method, a sputtering method, an ion plating method, or a cluster ion beam method.

[0090] When a metal vapor-deposited aluminum layer is used as the barrier layer 56, the thickness of the barrier layer 56 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. The surface of the intermediate layer 57 supporting the vapor-deposited thin aluminum film can be coated in advance with, for example, a vapor deposition primer in order to improve the adhesion of the vapor-deposited film, and other required pretreatments can be optionally performed.

[0091] The barrier layer 56 may be a transparent vapor-deposited layer that can be formed by a conventionally known method. In this case, the barrier layer 56 may be a transparent vapor-deposited layer made of an inorganic oxide.

[0092] The transparent deposition layer may be, for example, a deposition layer of an oxide of silicon (Si), aluminum (Al), magnesium (Mg), calcium (Ca), potassium (K), tin (Sn), sodium (Na), boron (B), titanium (Ti), lead (Pb), zirconium (Zr), yttrium (Y), etc. In particular, for a tube container, it is preferable to have a deposition layer of aluminum oxide or silicon oxide.

[0093] Inorganic oxides are expressed as, for example, SiO X , AlO X MO X(wherein, M represents an inorganic element, and the range of the value of X varies depending on the inorganic element). 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 is not transparent, and the upper limit of the range of X is the value when it is completely oxidized. Silicon (Si) and aluminum (Al) are preferably used for the packaging material, and silicon (Si) with a value in the range of 1.0 to 2.0 and aluminum (Al) with a value in the range of 0.5 to 1.5 can be used.

[0094] The thickness of the transparent vapor deposition layer varies depending on the type of inorganic oxide used, but is desirably selected from the range of, for example, 50 Å to 2000 Å, preferably 100 Å to 1000 Å. For example, in the case of a vapor deposition layer of aluminum oxide or silicon oxide, the thickness is desirably 50 Å to 500 Å, more preferably 100 Å to 300 Å.

[0095] The transparent deposition layer can be formed on the intermediate layer 57 by using the following formation method. Examples of the method for forming the deposition layer include physical vapor deposition methods (PVD methods) such as vacuum deposition, sputtering, and ion plating, and chemical vapor deposition methods (CVD methods) such as plasma chemical vapor deposition, thermal chemical vapor deposition, and photochemical vapor deposition. Specifically, the deposition layer can be formed on a molding roller using a roller-type deposition layer forming device.

[0096] Middle Tier The intermediate layer 57 is, for example, a layer that supports the first sealant layer 51 and the second sealant layer 53 and increases the strength of the entire laminate 50. As a material constituting the intermediate layer 57, for example, the same material as that of the base layer 52 described above can be used.

[0097] In the present embodiment, the thickness of the intermediate layer 57 is preferably not less than 10 μm and not more than 25 μm.

[0098] Next, a method for manufacturing the capped tube container 10A will be described with reference to FIGS. 3(a)-(c), 4 and 5. FIG.

[0099] First, the base material layer 52 is printed to form a printed layer 55 made of printing ink on the base material layer 52 .

[0100] Next, the first sealant layer 51, the base layer 52 on which the printed layer 55 is formed, and the second sealant layer 53 are bonded together by, for example, a dry lamination method. In this manner, for example, a laminate 50 shown in FIG. 2A is obtained (see FIG. 3(a)).

[0101] Next, the laminate 50 is rolled and the opposing edges 35 are joined together, for example, by heat sealing, to form a cylindrical tube, thereby producing the body tube 30. At this time, first, as shown in Fig. 3(b)-(c), the laminate 50 is wrapped around the outer surface of a 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 the opposing edges 35 of the laminate 50 are overlapped, the laminate 50 is conveyed downstream (left side of Fig. 3(b)-(c)) by a guide roll (not shown). The inner seal member 80 may be made of metal, for example, stainless steel.

[0102] Here, in this embodiment, the second sealant layer 53 of the laminate 50 constituting the trunk tube 30 may be a single layer, and the second sealant layer 53 may contain medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene. Also, in this embodiment, the second sealant layer 53 of the laminate 50 may have a plurality of layers, and among the plurality of layers of the second sealant layer 53, the innermost layers 53c and 53e constituting the inner surface 502 may contain medium density polyethylene and a wear-resistant additives added to the medium density polyethylene. In these cases, the slipperiness and wear resistance of the second sealant layer 53 can be improved. Therefore, when the laminate 50 is wrapped around the inner seal member 80, the occurrence of scratches on the second sealant layer 53 can be suppressed.

[0103] 3(c), 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.

[0104] 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 together.

[0105] Thereafter, the joined laminate 50 is cut into individual body tubes 30. In this manner, the body tubes 30 are produced as shown in Fig. 4. At this time, the speed at which the body tubes 30 are produced may be about 300 tubes / min.

[0106] Next, the above-mentioned tube container 10 is manufactured by compression molding. At this time, the body tube 30 is inserted into a metal mold (not shown), and molten resin is supplied into the metal mold from a resin supplying device (not shown), thereby compression molding the head member 40 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. 5).

[0107] 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, the present invention is not limited to this, and the body tube 30 and the head member 40 may be joined by injection molding.

[0108] Next, a cap 20 is attached to the head member 40 of the obtained tube container 10, thereby obtaining a capped tube container 10A with the cap 20 attached. A plurality of the obtained capped tube containers 10A are stored together in a cardboard box 60 (see FIG. 6). Thereafter, the plurality of capped tube containers 10A are transported together with the cardboard box 60 to a factory or the like for filling with the contents C.

[0109] Here, in the cardboard box 60, the multiple capped tube containers 10A are housed compactly in the cardboard box 60 while being in contact with one another.

[0110] During this transportation, the body tubes 30 of the capped tube container 10A are rubbed against each other. On the other hand, in this embodiment, the first sealant layer 51 of the laminate 50 constituting the body tube 30 may be a single layer, and the first sealant layer 51 may contain medium density polyethylene and an abrasion resistance additive contained in the medium density polyethylene. Also, in this embodiment, the first sealant layer 51 of the laminate 50 may have multiple layers, and among the multiple layers of the first sealant layer 51, the outermost layer 51a constituting the outer surface 501 may contain medium density polyethylene and an abrasion resistance additive added to the medium density polyethylene. In these cases, the abrasion resistance of the outer surface side of the body tube 30 can be improved. As a result, even if the body tubes 30 of the capped tube container 10A are rubbed against each other, it is possible to suppress the outer surface of the body tube 30 from being scratched.

[0111] Thereafter, the capped tube container 10A is transported to a factory or the like for filling with the contents C, and an appropriate amount of, for example, toothpaste or other contents C is filled through the opening 50B (see FIG. 5) of the body tube 30. Then, the opening 50B is 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.

[0112] As described above, according to the present embodiment, the first sealant layer 51 of the laminate 50 is a single layer, and the first sealant layer 51 contains a medium density polyethylene and an abrasion resistance additive added to the medium density polyethylene. In this way, the first sealant layer 51 contains a medium density polyethylene, so that the density of the first sealant layer 51 can be increased. Therefore, the rigidity of the first sealant layer 51 can be increased, and the slipperiness of the first sealant layer 51 can be easily improved. This can improve the abrasion resistance of the first sealant layer 51. In addition, the first sealant layer 51 contains a plurality of types of abrasion resistance additives, so that the abrasion resistance of the first sealant layer 51 can be improved. In this way, the first sealant layer 51 contains a medium density polyethylene and a plurality of types of abrasion resistance additives added to the medium density polyethylene, so that the abrasion resistance of the first sealant layer 51 can be improved. Therefore, the abrasion resistance of the body tube 30 can be improved. As a result, even if the body tubes 30 rub against each other, it is possible to prevent the outer surface of the body tube 30 from being scratched, and the appearance of the capped tube container 10A and the tube container 10 can be maintained.

[0113] Further, according to this embodiment, the second sealant layer 53 of the laminate 50 is a single layer, and the second sealant layer 53 contains medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene. In this way, the second sealant layer 53 contains medium density polyethylene, so that the density of the second sealant layer 53 can be increased. Therefore, the rigidity of the second sealant layer 53 can be increased, and the slipperiness of the second sealant layer 53 can be easily improved. This makes it possible to make the second sealant layer 53 less susceptible to scratches. In addition, the second sealant layer 53 contains a plurality of types of wear-resistant additives, so that the wear resistance of the second sealant layer 53 can be improved. In this way, the second sealant layer 53 contains medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene, so that the slipperiness and wear resistance of the second sealant layer 53 can be improved. Therefore, when the laminate 50 is wrapped around the inner seal member 80, which may be made of metal, it is possible to suppress the occurrence of scratches on the second sealant layer 53. Furthermore, since the occurrence of scratches on the second sealant layer 53 can be suppressed, foreign matter caused by scratches on the second sealant layer 53 can be suppressed from adhering to the inner seal member 80, etc.

[0114] According to this embodiment, the first sealant layer 51 of the laminate 50 has a plurality of layers, and among the plurality of layers of the first sealant layer 51, the outermost layer 51a constituting the outer surface contains medium density polyethylene and an abrasion resistance additive added to the medium density polyethylene. In this case as well, the abrasion resistance of the body tube 30 can be improved. Therefore, even if the body tubes 30 rub against each other, it is possible to prevent the outer surface of the body tube 30 from being scratched, and the appearance of the capped tube container 10A and the tube container 10 can be maintained.

[0115] According to this embodiment, the second sealant layer 53 of the laminate 50 has a plurality of layers, and among the plurality of layers of the second sealant layer 53, the innermost layers 53c and 53e constituting the inner surface contain medium density polyethylene and an abrasion resistance additive added to the medium density polyethylene. In this case as well, the slipperiness and abrasion resistance of the second sealant layer 53 can be improved. Therefore, when the laminate 50 is wrapped around the inner seal member 80, which may be made of metal, the occurrence of scratches on the second sealant layer 53 can be suppressed.

[0116] Furthermore, according to this embodiment, the wear resistance additive contains acrylic resin and erucic acid amide. This allows the body tube 30 formed by the laminate 50 to have better wear resistance. This makes it possible to more effectively prevent scratches on the body tube 30. EXAMPLES

[0117] Next, a specific example of the above embodiment will be described.

[0118] Example 1 First, the laminate 50 shown in Fig. 2A was produced. At this time, first, as a resin for the first sealant layer 51, a medium density polyethylene (UltZex (registered trademark), 3520L, density 931 kg / m, manufactured by Prime Polymer Co., Ltd.) was used. 3 A resin was prepared in which acrylic resin (UMERIT (registered trademark), 27308M, manufactured by Ube Maruzen Polyethylene Co., Ltd.) and erucic acid amide (UBE Polyethylene (registered trademark), M425, manufactured by Ube Maruzen Polyethylene Co., Ltd.) were added as wear resistance additives to a 100% polyethylene (MFR 2.1 g / 10 min.) The content of the acrylic resin was 2% by weight, and the content of the erucic acid amide was 2% by weight.

[0119] Next, this resin was formed into a film by an inflation method, thereby obtaining a resin film (thickness: 100 μm) for the first sealant layer 51.

[0120] Also, a biaxially oriented polyethylene terephthalate film (thickness: 12 μm) was prepared as the base layer 52. Then, a print layer 55 was formed on the biaxially oriented polyethylene terephthalate film.

[0121] Furthermore, as the second sealant layer 53, a medium density polyethylene film (thickness: 180 μm) was prepared.

[0122] Next, a resin film for the first sealant layer 51, a biaxially oriented polyethylene terephthalate film for the base layer 52, and a medium-density polyethylene film for the second sealant layer 53 were bonded by a dry lamination method to produce a laminate 50. The layer structure of the obtained laminate 50 is as follows. MDPE (acrylic resin + erucamide) / DL / PET / stamp / DL / MDPE In the above, "MDPE" means medium density polyethylene (hereinafter the same). Also, "DL" means a two-component curing urethane adhesive (base: polyester resin, curing agent: aliphatic polyisocyanate, dry weight 3.5g / m 2 ) is used to make the adhesive layer by the dry lamination method (same below). "PET" also means biaxially oriented polyethylene terephthalate (same below). "Mark" also means the printing layer (same below).

[0123] (1) Rubbing test (JSPS test) Next, a rubbing test was carried out on the laminate 50 simulating the time of transportation.

[0124] The measuring device used was FR-2 manufactured by Suga Test Instruments Co., Ltd., and the measuring method conforming to JIS-L-0849 was carried out.

[0125] In this case, a weight of 200 g was used.

[0126] In the rubbing test for the laminate 50, a rectangular laminate (30 mm) was attached to the base, and a rectangular laminate (30 mm) was also placed on the top.

[0127] This rubbing test was repeated 100 times, and the number of scratches formed on the surface of the laminate 50 was counted.

[0128] (2) Transportation test Next, a transportation test was carried out. First, seven capped tube containers 10A were prepared using the laminate 50 thus produced.

[0129] Next, seven of the capped tube containers 10A were placed in a cardboard box, and the cardboard box containing the capped tube containers 10A was transported by truck at a speed of about 60 km / h over a transport distance of about 400 km.

[0130] Then, the area of ​​the scratches on the body tube 30 of the seven capped tube containers 10A was measured, and the average of the measured areas was calculated. In this case, the area of ​​the scratches on the body tube 30 was determined as the total area of ​​the scratches Sc (see FIG. 7) on the body tube 30. Here, as shown in FIG. 7, when the scratches Sc on the body tube 30 spread in the X direction (horizontal direction) and the Y direction (up and down direction) perpendicular to the X direction when the capped tube container 10A is placed upside down (head down) on a horizontal surface, the area of ​​the scratches Sc was determined as the area of ​​a rectangle Sq surrounding the scratches Sc. Specifically, the area of ​​the scratches Sc was determined as the area of ​​a rectangle Sq having a pair of sides extending in the X direction and a pair of sides extending in the Y direction (i.e., the "X-direction distance of the scratches Sc") x the "Y-direction distance of the scratches Sc"). In addition, when the scratch Sc occurring in the body tube 30 extends parallel to the Y direction (or X direction), the area of ​​the scratch was calculated as "the width of the scratch Sc (distance in the X direction (or Y direction))" x "the length of the scratch Sc (distance in the Y direction (or X direction))".

[0131] (3) Slippage test Further, a sliding test was carried out on the produced laminate 50. In this test, the first sealant layers 51 of a pair of laminates 50 were brought into contact with each other, and the static friction coefficient (μs) and the dynamic friction coefficient (μd) were measured.

[0132] The measuring device used in the slippage test was a TR-2 manufactured by Toyo Seiki Seisakusho Co., Ltd., and the measurement method conformed to JIS K-7125.

[0133] The test conditions were N=3 and 100 mm / min. The average values ​​measured were taken as the static friction coefficient (μs) and the dynamic friction coefficient (μd).

[0134] Example 2 Except for the fact that the laminate 50 shown in Fig. 2B was produced, the laminate 50 and the capped tube container 10A were produced in the same manner as in Example 1. In addition, a rubbing test, a transportation test, and a sliding test were performed in the same manner as in Example 1.

[0135] 2B, a resin film having a first resin layer 51a, a second resin layer 51b, and a third resin layer 51c in this order was prepared as the first sealant layer 51. In this case, a medium-density polyethylene (UltZex (registered trademark), 3520L, density 931 kg / m, manufactured by Prime Polymer Co., Ltd.) was used as the resin for the first resin layer 51a. 3 A resin was prepared in which acrylic resin (UMERIT (registered trademark), 27308M, manufactured by Ube Maruzen Polyethylene Co., Ltd.) and erucic acid amide (UBE Polyethylene (registered trademark), M425, manufactured by Ube Maruzen Polyethylene Co., Ltd.) were added as wear resistance additives to a 100% polyethylene (MFR 2.1 g / 10 min.) The content of the acrylic resin was 2% by weight, and the content of the erucic acid amide was 2% by weight.

[0136] The resin for the second resin layer 51b and the third resin layer 51c was medium-density polyethylene (UltZex (registered trademark), 3520L, density 931 kg / m, manufactured by Prime Polymer Co., Ltd.). 3 A 2.1g / 10min MFR was prepared.

[0137] Next, these resins were formed into films by an inflation method to obtain a resin film (thickness 100 μm, thickness ratio of each layer (first resin layer: second resin layer: third resin layer)=1:3:1) for the first sealant layer 51. The layer structure of the resin film is as follows. (MDPE (acrylic resin + erucamide) / MDPE / MDPE)

[0138] Also, a biaxially oriented polyethylene terephthalate film (thickness: 12 μm) was prepared as the base layer 52. Then, a print layer 55 was formed on the biaxially oriented polyethylene terephthalate film.

[0139] Furthermore, as the second sealant layer 53, a medium density polyethylene film (thickness: 180 μm) was prepared.

[0140] Next, a resin film for the first sealant layer 51, a biaxially oriented polyethylene terephthalate film for the base layer 52, and a medium-density polyethylene film for the second sealant layer 53 were bonded by a dry lamination method to produce a laminate 50. The layer structure of the laminate 50 according to Example 2 is as follows. (MDPE (acrylic resin + erucamide) / MDPE / MDPE) / DL / PET / printed / DL / MDPE

[0141] Comparative Example 1 The resins for the first resin layer 51a, the second resin layer 51b, and the third resin layer 51c of the first sealant layer 51 were low-density polyethylene (manufactured by Prime Polymer Co., Ltd., EVOLUE (registered trademark), SP2320, density 920 kg / m 3 Except for the above, a laminate and a tube container with a cap were produced in the same manner as in Example 2. In addition, a rubbing test, a transportation test, and a sliding test were performed in the same manner as in Example 1.

[0142] The layer structure of the laminate according to Comparative Example 1 is as follows. (LDPE / LDPE / LDPE) / DL / PET / Mark / DL / MDPE In the above, "LDPE" means low density polyethylene.

[0143] Comparative Example 2 As the resin for the first resin layer 51a of the first sealant layer 51, a medium-density polyethylene containing no wear-resistant additive (UltZex (registered trademark), 3520L, density 931 kg / m, manufactured by Prime Polymer Co., Ltd.) was used. 3 Except for the above, a laminate and a tube container with a cap were produced in the same manner as in Example 2. In addition, a rubbing test, a transportation test, and a sliding test were performed in the same manner as in Example 1.

[0144] The layer structure of the laminate according to Comparative Example 2 is as follows. (MDPE / MDPE / MDPE) / DL / PET / Mark / DL / MDPE

[0145] Comparative Example 3 As the resin for the first resin layer 51a of the first sealant layer 51, a medium-density polyethylene not containing erucic acid amide (UltZex (registered trademark), 3520L, density 931 kg / m, manufactured by Prime Polymer Co., Ltd.) was used. 3 Except for the above, a laminate and a tube container with a cap were produced in the same manner as in Example 2. In addition, a rubbing test, a transportation test, and a sliding test were performed in the same manner as in Example 1.

[0146] The layer structure of the laminate according to Comparative Example 3 is as follows. (MDPE (acrylic resin) / MDPE / MDPE) / DL / PET / stamp / DL / MDPE

[0147] Comparative Example 4 As the resin for the first resin layer 51a of the first sealant layer 51, a medium-density polyethylene containing no acrylic resin (UltZex (registered trademark), 3520L, density 931 kg / m, manufactured by Prime Polymer Co., Ltd.) was used. 3Except for the above, a laminate and a tube container with a cap were produced in the same manner as in Example 2. In addition, a rubbing test, a transportation test, and a sliding test were performed in the same manner as in Example 1.

[0148] The layer structure of the laminate according to Comparative Example 4 is as follows. (MDPE (Erucaamide) / MDPE / MDPE) / DL / PET / Stamp / DL / MDPE

[0149] The results are shown in Tables 2 to 4. Table 2 shows the results of the rubbing test, Table 3 shows the results of the transportation test, and Table 4 shows the results of the sliding test.

[0150] [Table 2]

[0151] [Table 3]

[0152] [Table 4]

[0153] In Table 2 above, when the number of scratches per laminate was 20 or more, the result of the rubbing test was rated as "BAD", when the number of scratches was 10 or more but less than 20, the result of the rubbing test was rated as "NOT GOOD", and when the number of scratches was less than 5, the result of the rubbing test was rated as "GOOD".

[0154] In addition, in Table 3 above, the average area of ​​the damage on the body tube was 25 cm 2 The above items are rated as "BAD" in the transportation test, and the average damage area is 9cm 2 More than 25cm 2 If the average scratch area is less than 5cm, the result of the transportation test will be "NOT GOOD" and 2 Over 9cm 2If the average area of ​​the scratches is less than 5cm, the result of the transportation test will be "GOOD" 2 Anything below this rating will be deemed "SO GOOD" after the transportation test.

[0155] As a result, in the laminates according to Comparative Examples 1 to 4, 10 or more scratches were generated in the laminates, as shown in Table 2. On the other hand, in the laminates 50 according to Examples 1 and 2, the number of scratches generated in the laminates 50 was less than 5. In this way, in the laminates 50 according to Examples 1 and 2, the generation of scratches in the laminates 50 could be suppressed.

[0156] In addition, in the capped tube containers according to Comparative Examples 1 to 4, as shown in Table 3, the average area of ​​the scratches on the body tube was 25 cm 2 On the other hand, in the capped tube container 10A according to Example 1, the average area of ​​the scratches on the body tube 30 was 5 cm 2 In the capped tube container 10A according to Example 2, the average area of ​​the damage on the body tube 30 was less than 5 cm 2 Over 9cm 2 As described above, in the capped tube containers 10A according to Examples 1 and 2, the occurrence of scratches on the body tube 30 could be suppressed.

[0157] Furthermore, as shown in Table 4, the static friction coefficient and kinetic friction coefficient of the laminate 50 according to Example 1 were smaller than those of the laminates according to Comparative Examples 1 to 4, respectively. Moreover, the static friction coefficient and kinetic friction coefficient of the laminate 50 according to Example 2 were smaller than those of the laminates according to Comparative Examples 1 to 3, respectively, and the kinetic friction coefficient was smaller than that of the laminate according to Comparative Example 4. Thus, in the laminates 50 according to Examples 1 and 2, the slipperiness of the first sealant layer 51 could be improved, and the abrasion resistance of the laminate 50 could be improved.

[0158] In this way, in the laminate 50 according to Example 1 and Example 2, the slipperiness of the first sealant layer 51 can be improved, and the occurrence of scratches on the laminate 50 can be suppressed. Therefore, in the capped tube container 10A, the occurrence of scratches on the body tube 30 can be suppressed.

[0159] It is also possible to combine the multiple components disclosed in the above embodiments as necessary, or to delete some of the components disclosed in the above embodiments. [Explanation of symbols]

[0160] 10 Tube container 10A Tube container with cap 20 Cap 30 Body tube 31 one end 35 Edge 40 Head parts 50 Laminate 501 Exterior 502 Inside 51 First sealant layer 51a 1st resin layer 51b 2nd resin layer 51c 3rd resin layer 51d 4th resin layer 51e 5th resin layer 52 Base material layer 53 Second sealant layer 53a 1st resin layer 53b 2nd resin layer 53c 3rd resin layer 53d 4th resin layer 53e 5th resin layer

Claims

1. In tube container packaging materials, The sealing member includes a first sealant layer, a base layer, and a second sealant layer, which are arranged in this order from the outer surface to the inner surface, the first sealant layer is a single layer; The first sealant layer includes a medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene, the anti-wear additive includes an acrylic resin as one of the plurality of types and an erucic acid amide as another of the plurality of types; the second sealant layer having a plurality of layers; Among the plurality of layers of the second sealant layer, an innermost layer constituting the inner surface contains a medium density polyethylene and a plurality of kinds of abrasion resistance additives added to the medium density polyethylene, In the innermost layer, the content of the wear resistance additive is 0.01% by weight or more and 10% by weight or less, A packaging material for tube containers, wherein the content of the wear resistance additive in the second sealant layer is 0.0021% by weight or more and 2.5% by weight or less.

2. 2. The packaging material for tube containers according to claim 1, wherein the content of the wear resistance additive in the first sealant layer is 0.01% by weight or more and 10% by weight or less.

3. In tube container packaging materials, The sealing member includes a first sealant layer, a base layer, and a second sealant layer, which are arranged in this order from the outer surface to the inner surface, the second sealant layer is a single layer; The second sealant layer includes a medium density polyethylene and a plurality of types of wear-resistant additives added to the medium density polyethylene, the anti-wear additive includes an acrylic resin as one of the plurality of types and an erucic acid amide as another of the plurality of types; the first sealant layer having a plurality of layers; Among the plurality of layers of the first sealant layer, an outermost layer constituting the outer surface contains a medium density polyethylene and a plurality of kinds of abrasion resistance additives added to the medium density polyethylene, In the outermost layer, the content of the wear resistance additive is 0.01% by weight or more and 10% by weight or less, A packaging material for tube containers, wherein the content of the wear resistance additive in the first sealant layer is 0.0021% by weight or more and 2.5% by weight or less.

4. 4. The packaging material for tube containers according to claim 3, wherein the content of the wear resistance additive in the second sealant layer is 0.01% by weight or more and 10% by weight or less.

5. In a tube container, A body tube in which opposing edges of the packaging material for tube containers according to any one of claims 1 to 4 are overlapped and joined to each other; a head member joined to one end of the body tube.

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

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