Tube container

Abstract

To provide a tube container which can suppress remaining of contents in an end in a width direction of a body part.SOLUTION: A tube container includes a cylindrical body part that can store contents with one end closed and is formed of a film material containing a resin material and a spouting part that is mounted on the other end of the body part and can block the other end of the body part, in which the film material has a thickness of 30 μm or more and 200 μm or less and a loop stiffness value (loop length of 60 mm) in the width direction of the body part of 600 mN or less.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Tube containers that can be filled and packaged with pharmaceuticals, cosmetics, food, etc. are known. For example, Patent Document 1 discloses a tube container consisting of a spout, a shoulder, and a body. In the tube container disclosed in Patent Document 1, the body is formed with high rigidity using a resin film material with a thickness of approximately 200 μm to 400 μm and a relatively high elastic modulus (strong stiffness). This causes a phenomenon known as "air bagging," in which air flows into the body as the body returns to its original shape after the contents are squeezed out. For this reason, tube containers actively use film materials with strong stiffness, with an emphasis on airbag properties. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-199280 Summary of the Invention [Problem to be solved by the invention]

[0004] With such tube containers, due to the stiffness of the film material, there was an issue where a small amount of the contents remained in gaps at both ends of the body in the width direction when the contents were squeezed out. Figure 2 shows a cross-sectional view of the body when the contents are being squeezed out, cut along a plane perpendicular to the length. As shown in Figure 2, due to the stiffness of the film material, even if the body is crushed when squeezing the contents out, gaps that cannot be crushed are created at both ends in the width direction, i.e., around the bends of the film material, and a small amount of the contents remains in these gaps, resulting in the issue of not being able to use up all the contents.

[0005] The present invention has been made in view of the above-mentioned problems, and aims to provide a tube container that can prevent the contents from remaining at the widthwise ends of the body. [Means for solving the problem]

[0006] One aspect of the present invention for solving the above-mentioned problems is a tube container including a cylindrical body portion formed of a film material containing a resin material, one end of which is closed and capable of containing contents, and a spout portion attached to the other end of the body and capable of closing the other end of the body, wherein the film material is A polyethylene terephthalate film, a nylon film, and a sealant layer, The thickness 77 μm or more 146 μm or less, and the loop stiffness value in the width direction of the body (loop length 60 mm) 52mN or more331 It is a tube container with a strength of less than mN. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a tube container that can prevent the contents from remaining at the widthwise ends of the body portion. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front view of a tube container according to an embodiment of the present invention; [Figure 2] Cross-sectional view of a tube container according to the prior art DETAILED DESCRIPTION OF THE INVENTION

[0009] A tube container according to an embodiment of the present invention will be described with reference to the drawings. A tube container 100 according to one embodiment of the present invention includes a body 10 having one closed end and a spout 20 attached to the other end of the body 10. Figure 1 is a front view of the tube container 100.

[0010] The outlet 20 is attached to the other end of the body 10 and is a member that can close the other end of the body 10. As an example, the outlet 20 includes a hollow shoulder 21 whose outer diameter decreases with increasing distance from the other end of the body 10, and a tubular portion 22 that extends from the shoulder 21 on the opposite side of the body 10. The other end of the body 10 can be closed by attaching a cap or the like (not shown) to the tubular portion 22.

[0011] The body 10 is a tubular member with one closed end that can accommodate contents, and is formed using a film material containing a resin material. The body 10 has a bottom 11 at one end that is closed by bonding an area across the width of the body 10. As an example, the body 10 also has a bonding portion 13 in the center of the width direction, formed by bonding together the ends of the body 10 in the width direction. The film material at the bonding portion 13 can be bonded using well-known methods such as butt-to-butt bonding, in which the inner surfaces of the film material are bonded together, or envelope bonding, in which the inner and outer surfaces of the film material are bonded together.

[0012] The film material used for the body portion 10 has a thickness of 30 μm to 200 μm, and a loop stiffness value of 600 mN or less at a loop length of 60 mm in the width direction of the body portion 10. By making the film material thinner than the thickness of film materials used in conventional tube containers (approximately 200 μm to 400 μm) and setting the loop stiffness value to 600 mN or less, the rigidity of the body portion 10 can be reduced. This allows the radius of curvature of the width direction ends of the body portion 10, i.e., the bent parts of the film material, to be reduced when squeezing out the contents, enabling the body portion 10 to be crushed evenly all the way to the ends. As a result, it is possible to prevent gaps from being generated at both width direction ends of the body portion 10 that cannot be crushed, and to prevent the contents from remaining in these gaps.

[0013] Furthermore, by making the film material relatively thin, between 30 μm and 200 μm, and keeping the loop stiffness value below 600 mN, less material is required to form the film material, and the layer structure of the film material is simpler, thereby reducing manufacturing costs.

[0014] Furthermore, since the film material has low elasticity, the tube container 100 can be manufactured using a bag-making machine that can produce bag-shaped packaging containers without using a relatively expensive tubing machine, thereby reducing manufacturing costs.

[0015] The film material for forming the body portion 10 may be a single-layer film or a multilayer film formed by lamination or extrusion, as long as it has the above-mentioned thickness and loop stiffness values. The resin material contained in the film material is not particularly limited, but examples include polyethylene terephthalate (PET), nylon (NY), and linear low-density polyethylene (LLDPE). Depending on the functionality required of the body portion 10, the film member may also include a well-known functional film. For example, a film containing aluminum foil or EVOH resin may be laminated to impart gas barrier properties. [Example]

[0016] Using the tube containers according to Examples 1 to 5 and Comparative Examples 1 to 5, the size of the gaps that occurred at the widthwise ends when the body portion 10 was crushed was evaluated.

[0017] Example 1 As Example 1, a tube container shown in Fig. 1 was produced. The film material for the body was a multilayer film in which PET (25 µm) / PET (12 µm) / LLDPE (150 µm) were laminated in this order from the outer layer of the body.

[0018] Example 2 The difference between Example 2 and Example 1 is the layer structure of the film material. For the film material, a multilayer film was used in which PET (12 μm) / aluminum (9 μm) / NY (25 μm) / LLDPE (100 μm) were laminated in this order from the outer layer of the body.

[0019] Example 3 The difference between Example 3 and Example 1 is the layer structure of the film material. For the film material, a multilayer film was used in which PET (12 μm) / NY (25 μm) / LLDPE (100 μm) were laminated in this order from the outer layer of the body.

[0020] Example 4 The difference between Example 4 and Example 1 is the layer structure of the film material. For the film material, a multilayer film was used in which PET (12 μm) / NY (15 μm) / LLDPE (100 μm) were laminated in this order from the outer layer of the body.

[0021] Example 5 The difference between Example 5 and Example 1 is the layer structure of the film material. For the film material, a multilayer film was used in which PET (12 μm) / NY (15 μm) / LLDPE (50 μm) were laminated in this order from the outer layer of the body.

[0022] (Comparative Examples 1 to 5) Commercially available tube containers using laminated multilayer film as the film material were used as Comparative Examples 1 to 4. Furthermore, a commercially available tube container using blow-molded monolayer film as the film material was used as Comparative Example 5.

[0023] Nine tube containers each according to Examples 1 to 5 and Comparative Examples 1 to 5, which were not filled with contents, were prepared, and pressure-sensitive paper was inserted into the body from the bottom. Three adult males then pinched and crushed the body of three tube containers of each level using their thumbs and index fingers. The area where the pressure-sensitive paper did not develop color was measured and recorded as the gap width W generated at the widthwise end of the body. As shown in Figure 2, the gap width W is the length in the width direction of the gap generated at the widthwise end of the body. Table 1 shows the thickness of the film material used for each tube container, the loop stiffness value (LS value) at a loop length of 60 mm, and the measured gap width W. The gap width W value is the average value of the gap width W values ​​obtained from the nine tube containers.

[0024] [Table 1]

[0025] As shown in Table 1, in the tube containers according to Examples 1 to 5, in which the film material had a thickness of 30 μm or more and 200 μm or less and a loop stiffness value of 600 mN or less, the gap width W was a small value of 2.00 mm or less. On the other hand, in the tube containers according to Comparative Examples 1 to 5, in which the film material had a thickness of more than 200 μm and a loop stiffness value of more than 600 mN, the gap width W was a large value of 2.10 mm or more. From these results, it was confirmed that by using a film material having a thickness of 30 μm or more and 200 μm or less and a loop stiffness value of 600 mN or less, the gap at the width direction end of the body portion can be reduced, thereby preventing the contents from remaining in the body portion. [Industrial Applicability]

[0026] The present invention can be used for packaging containers that can be filled with medicines, cosmetics, food, etc. [Explanation of symbols]

[0027] 10. Torso 11 Bottom 13 Laminating section 20 Spout part 30 Shoulder 100 tube containers

Claims

[Claim 1] a cylindrical body portion having one end closed and capable of accommodating contents, the body portion being formed of a film material containing a resin material; a spout portion attached to the other end of the body portion and capable of closing the other end of the body portion, The film material is A polyethylene terephthalate film, a nylon film, and a sealant layer, The thickness is 77 μm or more and 146 μm or less, and the loop stiffness value in the width direction of the body portion (loop length 60 mm) is 52 mN or more and 331 mN or less. Tube container.

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