Tube container

Abstract

To provide a tube container that can separate film and paper that make up the body part.SOLUTION: A tube container is formed by a sheet having a thickness of 30 μm or more and 300 μm or less with a paper layer, a base film layer, and a sealant layer in order, includes a tube-shaped body part with one end closed, and a spout part attached to the other end of the body part, the peeling strength when peeling the paper layer off the base film layer is 0.1 N / 15 mm or more and 10 N / 15 mm or less.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a tube container.

Background Art

[0002] As a packaging material for pharmaceuticals, cosmetics, foods, etc., tube containers made of resin-based materials are widely used. For example, Patent Document 1 describes a tube container including a dispensing unit for extracting the contents and a body portion welded to the dispensing unit for containing the contents.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In recent years, from the viewpoints of reducing environmental impact and conserving resources, there has been a demand for reducing the amount of resin used in packaging containers. Therefore, in a resinous tube container as described in Patent Document 1, in order to reduce the amount of resin, for example, it is conceivable to make the film constituting the body portion thinner. However, if the film constituting the body portion is simply made thinner, the stiffness of the body portion becomes weak and the self-standing property of the container decreases. Therefore, in order to ensure the stiffness necessary for the self-standing property of the container, it has been considered to use paper for a part of the material constituting the body portion.

[0005] In the case of a tube container using resin and paper for the body portion in this way, from the viewpoint of resource recycling, it is preferable that the film and the paper can be separated and discarded. However, in the tube containers using paper for a part of the material constituting the body portion that have been conventionally studied, the film and the paper could not be separated.

[0006] Therefore, an object of the present invention is to provide a tube container in which a film and paper constituting a body portion can be separated. **Means for Solving the Problems**

[0007] The tube container according to the present invention is formed of a sheet having a thickness of 30 μm or more and 300 μm or less, which sequentially has a paper layer, a base material film layer, and a sealant layer, and includes a tube-shaped body portion having one end closed, and a spout portion attached to the other end of the body portion. When peeling the paper layer and the base material film layer, the peeling strength is 0.1 N / 15 mm or more and 10 N / 15 mm or less. On the surface of the paper layer on the base film layer side, a film layer made of the same material as the base film layer is laminated, and an adhesive varnish having easy adhesiveness is pattern-coated on at least one of the surface of the base film layer on the paper layer side and the surface of the film layer on the base film layer side. At a position in contact with the adhesive varnish having easy adhesiveness, a resin layer having a property of strongly fusing with the adhesive varnish having easy adhesiveness and not fusing with the base film layer is laminated. . **Advantages of the Invention**

[0008] According to the present invention, it is possible to provide a tube container in which a film and paper constituting a body portion can be separated. **Brief Description of the Drawings**

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

[0010] FIG. 1 is a front view showing a schematic configuration of a tube container according to an embodiment, FIG. 2 is a perspective view of a spout portion shown in FIG. 1, and FIG. 3 is an end view taken along line III-III shown in FIG. 2. FIGS. 2 and 3 show a state before the body portion is sealed to the spout portion.

[0011] The tube container 100 includes a tubular body portion 1 and a spout portion 2 attached to the body portion 1.

[0012] The body portion 1 is a member for accommodating the content, and is formed by forming a sheet having a pair of substantially parallel edges into a tubular shape. The body portion 1 is formed in a tubular shape, for example, by butting and welding the inner surfaces of strip-shaped portions each including one of the pair of edges of the sheet in a clasped state. One end portion 5a (the lower end in FIG. 1) of the body portion 1 is sealed and closed. On the other hand, a vicinity portion of the other end portion 5b (the upper end in FIG. 1) of the body portion 1 is sealed to the outer surface 8 of a flange portion 4 described later in a folded state. A plurality of pleats 12 formed by folding the sheet constituting the body portion 1 are formed at the welded portion between the body portion 1 and the flange portion 4. A bonding portion 7 (back bonding portion) formed on the body portion 1 by bonding the edge portions of the film may be bent along the outer surface of the body portion 1 and bonded to the body portion 1. The method of bonding the bonding portion 7 to the body portion 1 is not particularly limited, and the two may be welded through a heat-sealable resin provided entirely or partially on the surface of the film constituting the body portion 1, or the two may be adhered through an adhesive such as hot melt.

[0013] FIGS. 4 to 8 are cross-sectional views showing an example of a sheet constituting the body portion of the tube container, and FIG. 9 is a cross-sectional view taken along line IX-IX shown in FIG. 1.

[0014] The body 1 of the tube container 100 is composed of a sheet 41. The sheet 41 is a multilayer sheet in which a base film layer 33, a barrier layer 34, and a sealant layer 35 are laminated in this order on one surface side of a paper layer 32, a paper protective layer 37 is laminated on the other surface side of the paper layer 32, and an ink layer 38 and an overcoat varnish layer 39 are laminated on the paper protective layer 37. An adhesive for bonding the layers to each other may be used between the layers.

[0015] The paper layer 32 and the base film layer 33 have peelability therebetween. That is, the peel strength between the paper layer 32 and the base film layer 33 is designed to be weaker than the peel strength between other layers, and the paper layer 32 and the base film layer 33 are peelable. By peeling the paper layer 32 and the base film layer 33, the paper layer 32 and the layers laminated on the paper layer 32 (the paper protective layer 37, the ink layer 38, and the overcoat varnish layer 39 in FIGS. 4 to 8) can be separated from the sheet 41. The peel strength between the paper layer 32 and the base film layer 33 is 0.5 N / 15 mm or more and 10 N / 15 mm or less, and more preferably 1 N / 15 mm or more and 3 N / 15 mm or less. When the peel strength is less than 0.5 N / 15 mm, the adhesive strength is weak, and the paper layer 32 may peel off unintentionally during the use of the tube container 100. When it exceeds 10 N / 15 mm, the peel strength is strong, and it becomes difficult to separate the paper layer 32 and the base film layer 33.

[0016] Hereinafter, the details of each layer and the method of imparting peelability will be described.

[0017] First, the details of each layer will be described.

[0018] (Paper layer) The paper layer 32 is a structural layer that imparts strength and stiffness to the tube container 100. The type of paper constituting the paper layer 32 is not particularly limited, but it is preferable to use single-sided kraft paper or double-sided kraft paper in terms of having strength, bend resistance, and printability. Further, as the paper constituting the paper layer 32, water-resistant paper, oil-resistant paper, or cup base paper may be used as necessary.

[0019] The basis weight of the paper used for the paper layer 32 is 30 to 300 g / m 2 and preferably 50 to 170 g / m 2 . When the basis weight of the paper used for the paper layer 32 is less than 30 g / m 2 , the stiffness of the body portion 1 is insufficient. To compensate for the stiffness, for example, it is necessary to increase the thickness of the resin film provided inside the paper layer 32, which leads to an increase in the resin ratio and is not desirable in terms of reducing the environmental load. Also, when the basis weight of the paper used for the paper layer 32 exceeds 300 g / m 2 , due to the stiffness and heat insulation properties of the paper, the tube-making property (bag-making property), formability, and weldability deteriorate, and the manufacturing cost also increases, which is not preferable. Further, the mass of the cellulose fibers contained in the paper layer 32 is 50% or more of the total mass of the paper layer 32.

[0020] (Base film layer) The base film layer 33 is a layer that imparts physical strength such as heat resistance and toughness to the sheet 41. The base film layer 33 is also a layer that serves as a base for the barrier layer 34. The material of the film constituting the base film layer 33 is not particularly limited, but from the viewpoints of heat resistance and physical strength, it is preferable to use a stretched film such as polypropylene, polyester, or polyamide.

[0021] (Barrier layer) The barrier layer 34 is a functional layer that blocks oxygen, water vapor, etc. and improves the storage stability of the contents. The barrier layer 34 can be composed of, for example, one or more of a vapor deposition film of an inorganic compound such as silica or alumina, a metal vapor deposition film such as aluminum, a metal foil such as aluminum, a plate-like mineral, and / or a coating film of a barrier coating agent containing a barrier resin. As the barrier resin used for the barrier coating agent, ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride (PVDC), etc. can be used, and a binder resin other than the barrier resin is appropriately blended in the barrier coating agent. The barrier layer 34 may be laminated in advance on the base film layer 33 to form a barrier film, or may be provided as a single-layer film.

[0022] (Sealing layer) The sealant layer 35 is a layer provided for the welding of the bonding portion 7 and the pouring outlet portion 2 to the body portion 1. The material of the sealant layer 35 is not particularly limited, but it is preferably a thermoplastic resin such as polypropylene, polyethylene, cyclic polyolefin, or polyester. The sealant layer 35 uses a resin whose softening temperature is 20°C or more lower than the softening temperature of the base film layer 33. If the softening temperature of the sealant layer 35 is not 20°C or more lower than the softening temperature of the base film layer 33, there is a high possibility that the base film layer 33 softens during sealing and pinholes are generated, which is not preferable. The softening temperature of the sealant layer 35 is preferably 40°C or more lower than the softening temperature of the base film layer 33.

[0023] The thermoplastic resin used for the sealant layer 35 may be any resin that has adhesiveness to the thermoplastic resin constituting the material of the pouring outlet portion 2 described later, but it is preferably the same material as the thermoplastic resin used for the pouring outlet portion 2. By making the thermoplastic resin used for the sealant layer 35 the same as the thermoplastic resin layer used for the pouring outlet portion 2, the sealing strength between the body portion 1 and the pouring outlet portion 2 can be improved.

[0024] (Paper protection layer) The paper protection layer 37 is a layer for protecting the paper layer 32 constituting the sheet 41 from the adhesion of contents and dirt. The material and formation method of the paper protection layer 37 are not particularly limited, but the paper protection layer 37 can be laminated by extrusion coating of a thermoplastic resin or coating with a coating agent such as a water-resistant agent or an oil-resistant agent. The thickness of the paper protection layer 37 is preferably 0.2 to 50 μm, and more preferably 0.5 to 20 μm. If the thickness of the paper protection layer 37 is less than 0.2 μm, pinholes may occur in the paper protection layer 37, and the protection of the paper layer 32 may be insufficient. Also, if the thickness of the paper protection layer 37 exceeds 50 μm, it is not preferable in terms of resin usage amount and manufacturing cost.

[0025] (Ink layer, overcoat varnish layer) The ink layer 38 is a layer applied by printing for various displays, and the overcoat varnish layer 39 is a layer for imparting abrasion resistance and the like. The lamination order of the ink layer 38 and the overcoat varnish layer 39 may be reversed from that in FIG. 4. Further, the overcoat varnish layer 39 may also serve as the paper protection layer 37.

[0026] The thickness (total thickness) of the sheet 41 constituting the body portion 1 is not particularly limited, but is preferably 30 to 300 μm. If the thickness of the film constituting the body portion 1 is within this range, the body portion 1 can be easily processed into a tubular shape using a bag-making machine, a pillow-stick packaging machine, or the like. Further, since the paper layer 32 imparts strength and stiffness, it can be made thinner compared to a general laminated tube (thickness 300 to 500 μm), and the resin usage amount can also be reduced.

[0027] In order to reduce the resin ratio of the sheet 41 constituting the body portion 1, it is preferable that the proportion of the paper layer 32 in the mass of the sheet 41 is 50% or more. From the viewpoint of reducing the resin usage amount, the higher the proportion of the paper layer 32, the more preferable.

[0028] Note that one or more of the barrier layer 34, the paper protection layer 37, the ink layer 38, and the overcoat varnish layer 39 may be omitted from the sheet 41 constituting the body portion 1.

[0029] Next, a method for imparting peelability between the paper layer 32 and the base film layer 33 will be described. As an example of imparting peelability, as shown in FIG. 4, there is a method of laminating a peelable layer 36a between the paper layer 32 and the base film layer 33. The peelable layer 36a is a layer containing, for example, an easy peel material or a pseudo-adhesive, and is provided to weaken the peel strength between the paper layer 32 and the base film layer 33. Hereinafter, the case where an easy peel material and a pseudo-adhesive are used as the peelable layer 36a will be described.

[0030] (Method of using an EP material) As an easily peelable layer 36a laminated between the paper layer 32 and the base film layer 33, an EP layer made of an easy peel (EP) material is laminated. By using an EP material with a peel strength of 0.5 N / 15 mm or more and 10 N / 15 mm or less, the peel strength between the paper layer 32 and the base film layer 33 can be set to 0.5 N / 15 mm or more and 10 N / 15 mm or less, and the paper layer 32 and the base film layer 33 can be peeled off. Note that the peel strength between the paper layer 32 and the base film layer 33 is substantially equal to the peel strength of the EP material. Therefore, by adjusting the peel strength of the EP material, the peel strength between the paper layer 32 and the base film layer 33 can be suitably set. Examples of the EP material include an easy peel film or a hot melt material with weak cohesive force.

[0031] (Method of using a pseudo-adhesive) In the adhesion between the paper layer 32 and the base film layer 33, a pseudo-adhesive such as a pressure-sensitive adhesive or a re-peel adhesive is used. At this time, the applied pseudo-adhesive corresponds to the easily peelable layer 36a. The materials and coating amounts of these pseudo-adhesives are appropriately selected and adjusted so that the peel strength between the paper layer 32 and the base film layer 33 is 0.5 N / 15 mm or more and 10 N / 15 mm or less. Thereby, the peel strength between the paper layer 32 and the base film layer 33 can be suitably set, and the paper layer 32 and the base film layer 33 can be peeled off.

[0032] In addition, as another method of imparting easy peelability between the paper layer 32 and the base film layer 33, for example, as shown in FIGS. 5 to 7, there is a method of weakening the peel strength between the paper layer 32 and the base film layer 33 by pattern coating a release varnish or an easy-adhesive varnish between the paper layer 32 and the base film layer 33. Hereinafter, the case of pattern coating a release varnish or an easy-adhesive varnish will be described.

[0033] (Method of pattern coating a release varnish) As shown in Fig. 5, a varnish having peelability (peelable varnish) 36b is pattern-coated on at least one of the surface of the paper layer 32 on the base film layer 33 side and the surface of the base film layer 33 on the paper layer 32 side, and the paper layer 32 and the base film layer 33 are adhered with an adhesive. The coating amount and coating pattern of the peelable varnish 36b are appropriately adjusted so that the peel strength between the paper layer 32 and the base film layer 33 is 0.5 N / 15 mm or more and 10 N / 15 mm or less. Thereby, the peel strength between the paper layer 32 and the base film layer 33 can be preferably set, and the paper layer 32 and the base film layer 33 can be peeled off. When laminating the base film layer 33 and the paper layer 32, they may be extruded with a thermoplastic resin that strongly adheres to the base film layer 33 and the paper layer 32 but does not strongly adhere to the peelable varnish.

[0034] (Method of pattern-coating an easily adherable varnish) As shown in Figs. 6 and 7, a film layer 36c made of the same material as the base film layer 33 is laminated on the surface of the paper layer 32 on the base film layer 33 side, and an easily adherable varnish (easily adherable varnish) 36d is pattern-coated on at least one of the surface of the base film layer 33 on the paper layer 32 side and the surface of the film layer 36c on the base film layer 33 side. Further, a resin layer 36f is laminated adjacent to the easily adherable varnish 36d. The resin layer 36f has the property of strongly fusing with the easily adherable varnish 36d and not fusing with the base film layer 33 (film layer 36c), and is composed of a material having a peel strength with the base film layer 33 (film layer 36c) of 0.5 N / 15 mm or more and 10 N / 15 mm or less. Thereby, the paper layer 32 and the base film layer 33 can be peeled off by the film layer 36c and the resin layer 36f, or the resin layer 36f and the base film layer 33 peeling off. Note that the peel strength between the paper layer 32 and the base film layer 33 is substantially equal to the peel strength between the resin layer 36f and the base film layer 33 (film layer 36c). Therefore, by appropriately selecting the materials of the resin layer 36f and the base film layer 33 (film layer 36c), the peel strength between the paper layer 32 and the base film layer 33 can be preferably set.

[0035] Also, as another method of imparting peelability between the paper layer 32 and the base film layer 33, for example, there is a method of using paper having specific characteristics for the paper layer 32. In this case, as the adhesive for bonding the paper layer 32 and the base film layer 33, a general adhesive 36e that is also used for bonding between other layers can be used. Hereinafter, the case of using paper having specific characteristics for the paper layer 32 will be described with reference to FIG. 8.

[0036] (Method of adjusting by surface smoothness of paper layer) As the paper layer 32, paper having a Bekk smoothness defined in JIS P8119 of 20 to 300 seconds is used. The surface of the paper layer 32 having such smoothness has a fine uneven shape, and the paper layer 32 and the adhesive 36e applied on the base film layer 33 or the base film layer 33 are in point contact, so the adhesive area is small and the peel strength is also small. Thus, by using paper having a surface smoothness of 20 to 300 seconds, the peel strength between the paper layer 32 and the base film layer 33 can be set to 0.5 N / 15 mm or more and 10 N / 15 mm or less, and the paper layer 32 and the base film layer 33 can be peeled off. Further, examples of the adhesive 36e used for bonding the paper layer 32 and the base film layer 33 include polyolefin resins, and the thickness is preferably 5 μm or more and 100 μm or less, and more preferably 10 μm or more and 50 μm or less. If it is less than 10 μm, the peel strength between the paper layer 32 and the base film layer 33 is weak, and if it exceeds 100 μm, the peel strength is too strong and it is not easily peelable. Thus, the peel strength between the paper layer 32 and the base film layer 33 can be suitably set by adjusting the surface smoothness of the paper and the material and thickness of the adhesive.

[0037] The method of imparting peelability between the paper layer 32 and the base film layer 33 described above is an example, and is not limited to the above method as long as the peel strength between the paper layer 32 and the base film layer 33 is 0.5 N / 15 mm or more and 10 N / 15 mm or less. Further, the peel strength between the paper layer 32 and the base film layer 33 may be adjusted by appropriately combining the above methods.

[0038] A method for separating the paper layer 32 from the body 1 will be described with reference to FIG. 9. In FIG. 9, A is a layer laminated on the paper layer 32 and the paper layer 32, and is a layer separated from the body 1. FIG. 7(a) shows the state before separation. From this state, starting from the bonding portion 7, the paper layer 32 is peeled off from the body 1 (FIG. 7(b)), and the peeling is continued along the outer periphery of the film of the body 1 as it is, and finally the paper layer 32 and the layer laminated on the paper layer 32 are separated from the body 1 (FIG. 7(c)). Further, a notch may be formed in a part of the bonding portion 7. By forming the notch, it becomes a trigger for separating the paper layer 32 and the base material film layer 33, and the separation between the paper layer 32 and the base material film layer 33 can be made easier. The notch may be provided only in the paper layer 32 and the layer laminated on the paper layer 32, or may be provided in all the layers constituting the sheet 41.

[0039] Referring again to FIGS. 1 to 3, the spout portion 2 is a spout for extracting the contents stored in the body 1 to the outside, and includes a cylindrical spout tube portion 3 and a flange portion 4. The flange portion 4 is connected to one end portion 6a (the lower end in FIG. 1) of the spout tube portion 3, and is a flat plate-like portion extending outward of the spout tube portion 3. In the present embodiment, the flange portion 4 is formed so as to extend in a direction orthogonal to the axial direction of the spout tube portion 3 (the left-right direction in FIG. 1). In the present embodiment, the flange portion 4 is formed in an annular shape, but as long as the body 1 can be joined, the shape of the flange portion 4 is not limited, and it may be an elliptical shape, an oval shape, a track shape, a polygonal shape, or the like.

[0040] The pouring outlet portion 2 is formed of a material containing a thermoplastic resin and a filler other than the resin. As the thermoplastic resin used for the material of the pouring outlet portion 2, for example, any one of polyethylene, polypropylene, polyester, polyamide, and cycloolefin, or a combination of two or more thereof can be used. As the filler, any one of talc, kaolin, paper powder, and cellulose fiber, or a combination of two or more thereof can be used. By using a mixture of a thermoplastic resin and a filler other than the resin as the material of the pouring outlet portion 2, it is possible to reduce the amount of resin used while maintaining moldability and heat weldability with the sheet material of the body portion 1. The molding method of the pouring outlet portion 2 is not particularly limited, and existing molding methods such as injection molding, thermoforming such as vacuum molding and hot plate pressure air molding, and compression molding can be used.

[0041] As shown in FIGS. 2 and 3, an annular convex portion 9 and a concave portion 10 are provided on the outer surface 8 of the flange portion 4 (the surface on the end portion 6b side of the pouring cylinder portion 3). When welding the body portion 1 to the flange portion 4 of the pouring outlet portion 2, the convex portion 9 first melts, and the melted resin spreads between the inner surface of the body portion 1 and the flange portion 4. Also, a part of the melted resin flows into the concave portion 10. As a result, the inner surface of the body portion 1 and the outer surface 8 of the flange portion 4 can be welded together by the melted resin through the convex portion 9, and the welding strength can be improved.

[0042] As a method of welding the body portion 1 and the pouring outlet portion 2 during the manufacture of the tube container 100, ultrasonic welding, high-frequency welding, heat seal welding, hot air welding, compression molding of a body insert, etc. can be used. However, ultrasonic welding is preferably adopted in that it is less affected by the heat insulation property of paper. employed.

[0043] As shown in FIG. 1, the tube container 100 may further include a screw cap 11 that is detachably screwed onto the pouring cylinder portion 3 of the pouring outlet portion 2. When the tube container 100 is provided with the screw cap 11, it becomes easy to reseal the tube container ********** after opening.

[0044] Alternatively, instead of the screw cap 11, the tube container 100 may be provided with a hinge cap. When providing a hinge cap, the hinge cap may be attached to the spout portion 2 by screwing it onto the spout cylinder portion 3 shown in FIG. 1. Alternatively, ribs may be provided on the outer surface of the spout cylinder portion 3 instead of threads, and the hinge cap may be attached to the spout portion 2 by fitting through the ribs.

[0045] Further, a film that closes the spout cylinder portion 3 may be sealed to the end portion 6b of the spout cylinder portion 3 in the unopened state of the tube container 100.

[0046] Furthermore, the inside of the spout cylinder portion 3 may be closed by a partition wall in order to keep the inside of the container in a sealed state in the unopened state of the tube container 100. When providing a partition wall, it is preferable to provide a circular half cut along the inner circumference of the spout cylinder portion 3 and to provide a pull ring connected to the portion surrounded by the half cut. With this configuration, when opening the tube container 100, the user pulls the pull ring to break the half cut portion of the partition wall, thereby removing a part of the partition wall surrounded by the half cut and forming an opening for pouring the content from the body portion 1 into the spout cylinder portion 3.

[0047] As described above, in the present embodiment, since the peel strength between the paper layer 32 and the base film layer 33 is 0.5 N / 15 mm or more and 10 N / 15 mm or less, the paper layer 32 can be separated from the body portion 1 starting from the bonded portion 7, and the paper layer 32 does not peel off unintentionally during the use of the tube container 100. Therefore, according to the present embodiment, it is possible to provide a tube container 100 in which the film and the paper constituting the body portion 1 can be separated.

[0048] Moreover, if the peel strength between the paper layer 32 and the base film layer 33 is 1 N / 15 mm or more and 3 N / 15 mm or less, the paper layer 32 can be more easily separated from the body portion 1.

Example

[0049] Examples of specific implementations of the present invention will be described below.

[0050] Example 1 Basis weight 100g / m 2 A sheet for forming the body was produced by dry laminating a 30μm-thick EP material (manufactured by DIC Corporation, product name: E3701T) with a peel strength of 0.50N / 15mm, a 12μm-thick transparent barrier film (manufactured by Toppan Printing Co., Ltd., product name: GL-RD), a 15μm-thick oriented nylon film (manufactured by Unitika Ltd., product name: ONBC), and a 50μm-thick linear low-melting-point polyethylene (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) in this order onto unbleached kraft paper (manufactured by Oji Paper Co., Ltd.) using a two-component curing urethane adhesive, so that the peel strength between the unbleached kraft paper and the transparent barrier film was 0.50N / 15mm.

[0051] An ink layer and an overcoat varnish layer were laminated on the prepared sheet, and processed in a back-strap pouch making machine to prepare a back-strap pouch (body) of 35 mm diameter x 180 mm length.

[0052] The spout plug was made of polyethylene resin by injection molding.

[0053] The body and spout were heat-sealed together using a special processing device to create a tube container with a diameter of 35 mm.

[0054] Example 2 Basis weight 100g / m 2On unbleached kraft paper (manufactured by Oji Paper Co., Ltd.), an EP material (manufactured by DIC Corporation, product name: E3701T) with a peel strength of 1 N / 15 mm and a thickness of 30 μm, a PET film (manufactured by Toray Industries, Inc., product name: E5100) with a thickness of 12 μm, an aluminum foil (manufactured by Toyo Aluminum Co., Ltd.) with a thickness of 9 μm, and a linear low-density polyethylene (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) with a thickness of 50 μm were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. A tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that a sheet for forming the body was produced so that the peel strength between the unbleached kraft paper and the PET film was 1 N / 15 mm.

[0055] (Example 3) Basis weight 100 g / m 2 On unbleached kraft paper (manufactured by Oji Paper Co., Ltd.), an EP material (manufactured by DIC Corporation, product name: E3701T) with a peel strength of 3.1 N / 15 mm and a thickness of 30 μm, a stretched nylon film (manufactured by Unitika Ltd., product name: ONBC) with a thickness of 15 μm, an aluminum foil (manufactured by Toyo Aluminum Co., Ltd.) with a thickness of 9 μm, and a linear low-density polyethylene (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) with a thickness of 50 μm were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. A tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that a sheet for forming the body was produced so that the peel strength between the unbleached kraft paper and the stretched nylon film was 3.1 N / 15 mm.

[0056] (Example 4) Basis weight 100 g / m 2On unbleached kraft paper (manufactured by Oji Paper Co., Ltd.), a transparent barrier film with a thickness of 12 μm (manufactured by Toppan Printing Co., Ltd., product name: GL-RD), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., product name: ONBC), and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. At this time, a silicone-based release varnish was pattern-coated between the unbleached kraft paper and the transparent barrier film so that the peel strength between the unbleached kraft paper and the transparent barrier film was 0.70 N / 15 mm, and a tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that a sheet for forming the body was produced.

[0057] (Example 5) Basis weight 100 g / m 2 On unbleached kraft paper (manufactured by Oji Paper Co., Ltd.) with a basis weight of 100 g / m², an aluminum foil with a thickness of 9 μm (manufactured by Toyo Aluminum Co., Ltd.), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., product name: ONBC), and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. At this time, a silicone-based release varnish was pattern-coated between the unbleached kraft paper and the aluminum foil so that the peel strength between the unbleached kraft paper and the aluminum foil was 1.2 N / 15 mm, and a tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that a sheet for forming the body was produced.

[0058] (Example 6) Basis weight 100 g / m 2On unbleached kraft paper (manufactured by Oji Paper Co., Ltd.), an aluminum foil with a thickness of 9 μm (manufactured by Toyo Aluminum Co., Ltd.), a PET film with a thickness of 12 μm (manufactured by Toray Industries, Inc., product name: E5100), and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. At this time, a silicone-based release varnish was pattern-coated between the unbleached kraft paper and the aluminum foil so that the peel strength between the unbleached kraft paper and the AL was 2.5 N / 15 mm, and a tube container with a diameter of 35 mm was produced in the same manner as in Example 1 except that a sheet for forming the body was produced.

[0059] (Example 7) Grammage 100 g / m 2 On unbleached oil-resistant paper (manufactured by Daxing Paper Co., Ltd.) with a grammage of 100 g / m², an aluminum foil with a thickness of 9 μm (manufactured by Toyo Aluminum Co., Ltd.), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., product name: ONBC), and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. At this time, a silicone-based release varnish was pattern-coated between the unbleached kraft paper and the aluminum foil so that the peel strength between the unbleached kraft paper and the aluminum foil was 6 N / 15 mm, and a tube container with a diameter of 35 mm was produced in the same manner as in Example 1 except that a sheet for forming the body was produced.

[0060] (Example 8) Grammage 100 g / m 2On unbleached kraft paper (manufactured by Oji Paper Co., Ltd.), a PET film with a thickness of 12 μm (manufactured by Toray Industries, Inc., product name: E5100), a transparent barrier film with a thickness of 12 μm (manufactured by Toppan Printing Co., Ltd., product name: GL-RD), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., product name: ONBC), and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. At this time, a re-peel adhesive (manufactured by Toyochem Co., Ltd., product name: Cyabine SP-205) was used between the PET film and the transparent barrier film so that the peel strength was 0.70 N / 15 mm, and the coating amount was 10 g / m 2 (dry) laminated, and a tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that a sheet for forming the body was produced.

[0061] (Example 9) On a transparent barrier film with a thickness of 12 μm (manufactured by Toppan Printing Co., Ltd., product name: GL-RD), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., product name: ONBC) and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. The smoothness was 20 - 300 seconds, and the basis weight was 100 g / m 2 The glossy surface of the one-sided unbleached kraft paper (manufactured by Oji Paper Co., Ltd.) with a basis weight of 100 g / m and the transparent barrier film were laminated with a polyolefin resin with a thickness of 5 - 100 μm so that the peel strength between the unbleached kraft paper and the transparent barrier film was 1.4 N / 15 mm. A tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that a sheet for forming the body was produced.

[0062] (Example 10) On a transparent barrier film with a thickness of 12 μm (manufactured by Toppan Printing Co., Ltd., product name: GL-RD), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., product name: ONBC) and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive, with a smoothness of 20 to 300 seconds and a basis weight of 100 g / m 2 The glossy surface of the one-sided uncoated oil-resistant paper (manufactured by Daxing Paper Co., Ltd.) with a basis weight of 100 g / m 2 and the transparent barrier film were laminated with a polyolefin resin having a thickness of 5 to 100 μm so that the peel strength between the uncoated oil-resistant paper and the transparent barrier film was 2.8 N / 15 mm. A tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that a sheet for forming the body was produced.

[0063] (Comparative Example 1) On the uncoated kraft paper with a basis weight of 100 g / m 2 (manufactured by Oji Paper Co., Ltd.), a transparent barrier film with a thickness of 12 μm (manufactured by Toppan Printing Co., Ltd., product name: GL-RD), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., product name: ONBC), and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. At this time, the coating amount between the uncoated kraft paper / transparent barrier film was 2 g / m 2 (dry), and the coating amount of the other parts was 5 g / m 2 (dry). A tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that the step of imparting easy peelability was omitted and a sheet for forming the body was produced.

[0064] (Comparative Example 2) On the uncoated paper with a basis weight of 100 g / m 2On unbleached kraft paper (manufactured by Oji Paper Co., Ltd.), a transparent barrier film with a thickness of 12 μm (manufactured by Toppan Printing Co., Ltd., product name: GL-RD), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., product name: ONBC), and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. At this time, the coating amount between the unbleached kraft paper / transparent barrier film was 7 g / m 2 (dry), and the coating amount for the other parts was 5 g / m 2 (dry). A tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that the step of imparting easy peelability was omitted to produce a sheet for forming the body part.

[0065] (Comparative Example 3) Unbleached kraft paper with a basis weight of 100 g / m 2 (manufactured by Oji Paper Co., Ltd.), an EP material with a peel strength of 0.35 N / 15 mm and a thickness of 30 μm (manufactured by DIC Corporation, product name: E3701T), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., product name: ONBC), an aluminum foil with a thickness of 9 μm (manufactured by Toyo Aluminum Co., Ltd.), and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. A tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that a sheet for forming the body part was produced so that the peel strength between the unbleached kraft paper and the transparent barrier film was 0.35 N / 15 mm.

[0066] (Comparative Example 4) Unbleached kraft paper with a basis weight of 100 g / m 2On unbleached kraft paper (manufactured by Oji Paper Co., Ltd.), an aluminum foil with a thickness of 9 μm (manufactured by Toyo Aluminum Co., Ltd.), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., product name: ONBC), and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. At this time, a silicone-based release varnish was pattern-coated between the unbleached kraft paper and the aluminum foil so that the peel strength between the unbleached kraft paper and the aluminum foil was 13 N / 15 mm. A tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that a sheet for forming the body was prepared.

[0067] (Comparative Example 5) Basis weight 100 g / m 2 On unbleached kraft paper (manufactured by Oji Paper Co., Ltd.) with a basis weight of 100 g / m², a PET film with a thickness of 12 μm (manufactured by Toray Industries, Inc., product name: E5100), a transparent barrier film with a thickness of 12 μm (manufactured by Toppan Printing Co., Ltd., product name: GL-RD), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., product name: ONBC), and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., product name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive. At this time, a re-peel adhesive (manufactured by Toyochem Co., Ltd., product name: Cyabine SP-205) was used between the PET film and the transparent barrier film so that the peel strength was 12 N / 15 mm, and the coating amount was 30 g / m² (dry). A sheet for forming the body was prepared, and a tube container with a diameter of 35 mm was produced in the same manner as in Example 1. 2 (dry) and laminated, and a tube container with a diameter of 35 mm was produced in the same manner as in Example 1, except that a sheet for forming the body was prepared.

[0068] (Comparative Example 6) On a transparent barrier film with a thickness of 12 μm (manufactured by Toppan Printing Co., Ltd., trade name: GL-RD), a stretched nylon film with a thickness of 15 μm (manufactured by Unitika Ltd., trade name: ONBC) and a linear low-density polyethylene with a thickness of 50 μm (LLDPE, manufactured by Tamapoly Chemical Co., Ltd., trade name: SE625N) were laminated in this order by dry lamination using a two-component curable urethane-based adhesive, and the smoothness was less than 5 to 20 seconds and the basis weight was 100 g / m 2 of unbleached kraft paper (manufactured by Oji Paper Co., Ltd.) and the transparent barrier film were laminated with a polyolefin resin having a thickness of 5 to 100 μm, and a tube container having a diameter of 35 mm was produced in the same manner as in Example 1 except that the peel strength between the unbleached kraft paper and the transparent barrier film was 0.35 N / 15 mm.

[0069] For the tube containers prepared in Examples 1 to 10 and Comparative Examples 1 to 6, a rubbing test, a drop test, a vibration test, and a separability test were conducted. In the rubbing test, 100 mL of water was filled in the tube container and rubbed 100 times, and the peeling state of the paper layer was confirmed. In the drop test, with 100 mL of water filled in the tube container, it was dropped 10 times from a height of 1.5 m so that the posture of the tube container was random, and the peeling state of the paper layer was confirmed. In the vibration test, it was vibrated in the z-axis direction (the vertical direction, which is the axial direction of the container) for 15 minutes so that the amplitude and frequency of the vibration applied to the tube container were random, and the peeling state of the paper layer was confirmed. In the separability test, the paper layer was separated from the body part, and it was determined whether the mass of the paper layer remaining on the base film layer side was 5% or less of the mass of the paper layer before separation (paper residue is 5% or less), or whether the mass of the base film layer remaining on the paper layer side was 5% or less of the mass of the base film layer before separation (resin residue is 5% or less).

[0070] Table 1 shows the configurations of the tube containers according to each example and each comparative example, the method for imparting easy peelability, the peel strength, the evaluation of each test, and the comprehensive evaluation. The numerical values described in the column of the body part configuration in Table 1 represent the basis weight of the paper (g / m 2 ) or the thickness of the layer (μm).

[0071] Each test result and comprehensive evaluation in Table 1 were evaluated according to the following criteria. <Rubbing test, drop test, vibration test> +: No peeling -: Peeling occurred <Separation test> +: Paper residue or resin residue is 5% or less -: Paper residue or resin residue exceeds 5% <Comprehensive evaluation> ++: The peel strength is 1 N / 15 mm or more and 3 N / 15 mm or less, which is particularly preferable, and all are good in the rubbing test, drop test, vibration test, and separation test (all +) + : The peel strength is 0.5 N / 15 mm or more and less than 1 N / 15 mm and more than 3 N / 15 mm and 10 N / 15 mm or less, and all are good in the rubbing test, drop test, vibration test, and separation test (all +) - : The peel strength is less than 0.5 N / 15 mm or more than 10 N / 15 mm, and any one of the rubbing test, drop test, vibration test, and separation test is poor (any one -)

[0072]

Table 1

[0073] As shown in Table 1, all of the tube containers according to Examples 1 to 10 had excellent durability with no peeling of the paper layer in the rubbing test, drop test, and vibration test. Furthermore, in the separation test, both the paper residue and the resin residue were 5% or less, and the separability was also excellent. In particular, in Examples 2, 5, 6, 9, and 10, the peel strength was particularly preferable at 1 N / 15 mm or more and 3 N / 15 mm or less, and compared with Examples 1, 3, 4, 7, and 8 where the peel strength was 0.5 N / 15 mm or more and less than 1 N / 15 mm and more than 3 N / 15 mm and 10 N / 15 mm or less, the balance between durability and separability was more excellent.

[0074] In contrast, the tube containers according to Comparative Examples 1, 3, and 6 had excellent separability with both paper residue and resin residue being 5% or less in the separation test, and no peeling occurred in the drop test and the vibration test. However, since the peel strength was less than 0.5 N / 15 mm, peeling of the paper layer occurred in the kneading test.

[0075] The tube containers according to Comparative Examples 2, 4, and 5 had excellent durability with no peeling of the paper layer in the kneading test, drop test, and vibration test, but since the peel strength exceeded 10 N / 15 mm, both paper residue and resin residue exceeded 5% in the separation test, resulting in poor separability.

Industrial Applicability

[0076] The tube container according to the present invention can be used as a packaging material for pharmaceuticals, cosmetics, foods, etc.

Explanation of Reference Numerals

[0077] 1 Body 2 Pouring outlet part 3 Pouring cylinder part 4 Flange part 5a, 5b Ends 6a, 6b Ends 32 Paper layer 33 Base material film layer 35 Sealant layer 3 June 36 Easy-peeling layer <XXX 36a Film layer 36b Easy-adhesive varnish 36c Resin layer 41 Sheet

Claims

1. A tube-shaped body portion formed of a sheet having a thickness of 30 μm or more and 300 μm or less, which sequentially includes a paper layer, a base material film layer, and a sealant layer, and having one end closed, and a spout portion attached to the other end of the body portion, wherein the peel strength when peeling the paper layer and the base material film layer is 0.5 N / 15 mm or more and 10 N / 15 mm or less, a film layer made of the same material as the base material film layer is laminated on the surface of the paper layer on the side of the base material film layer, a varnish having easy adhesiveness is pattern-coated on at least one of the surface of the base material film layer on the paper layer side and the surface of the film layer on the base material film layer side, A resin layer having a property of strongly fusing with the varnish having easy adhesiveness and not fusing with the base material film layer is laminated at a position in contact with the varnish having easy adhesiveness. A tube container.

2. The tube container according to claim 1, wherein the peel strength is 1 N / 15 mm or more and 3 N / 15 mm or less.

3. The mass of the paper layer remaining on the base material film layer side after peeling the paper layer and the base material film layer is 5% or less with respect to the mass of the paper layer, or the mass of the base material film layer remaining on the paper layer side after peeling the paper layer and the base material film layer is 5% or less with respect to the mass of the base material film layer. The tube container according to claim 1 or 2.

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