Tube container and manufacturing method thereof

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 250 μm or less and the body part has a blocked bottom to which a region in the width direction of the body part is bonded provided on one end, and a rule mark extending in the length direction of the body part is provided between the end and the other end in the width direction of the bottom.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a tube container and a method for manufacturing the same. [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 a problem in that when the contents were squeezed out, a small amount of the contents remained in the gaps at both ends of the body in the width direction. Figure 3 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 3, due to the stiffness of the film material, even if the body is crushed when squeezing out the contents, 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 problem that the contents cannot be used up to the last drop.

[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 has a thickness of 30 μm or more and 250 μm or less, the body portion has a bottom portion at one end of which the area across the width of the body is bonded and closed, and a crease extending in the length direction of the body portion is formed between the end of the bottom portion in the width direction and the other end, and the crease teeth , It is formed by pressing film material, It is in contact with the bottom and the other end of the body. [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] 1 is a cross-sectional view of a tube container according to an embodiment of the present invention; [Figure 3] 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 with one end closed and a spout 20 attached to the other end of the body 10. Fig. 1 is a front view of the tube container 100. Fig. 2 is a cross-sectional view of the body 10 cut along a plane perpendicular to the longitudinal direction when the contents are being squeezed out.

[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 capable of containing contents, and is formed using a film material containing a resin material. The body 10 has a bottom 11 at one end, which is sealed across the width of the body 10 by bonding. The body 10 also has a crease 14 extending along the length of the body 10 between at least one of the widthwise ends of the bottom 11 and the other end. Furthermore, the body 10, as an example, has a joining section 13 in the widthwise center formed by joining the widthwise ends of the body 10 together. The film material at the joining section 13 can be joined by well-known methods, such as a seam-sealing method in which the inner surfaces of the film material are joined together, as shown in FIG. 2, or an envelope-like method in which the inner and outer surfaces of the film material are joined together. It is preferable that the crease 14 contact the bottom 11 and the other end, as shown in FIG. 1, to prevent the formation of gaps, as described below. However, it is not necessary for the crease 14 to be in contact with the bottom 11 as long as it is formed to extend along the length of the body 10.

[0012] The method for forming the ruled lines 14 is not particularly limited, but for example, in the process of forming the bonded portion 13, the body portion 10 can be formed by hot pressing at a temperature below the melting point of the material constituting the film material that forms the body portion 10.

[0013] The thickness of the film material used for the body portion 10 is 30 μm or more and 250 μm or less. If the thickness of the film material is 250 μm or less, the radius of curvature of the bent portion when folded can be made small, and therefore, the ruled lines 14 can be reliably formed in the film material.

[0014] The body 10 of the tube container 100 has the creases 14, which allow the widthwise ends of the body 10 to be bent along the creases 14 when squeezing out the contents. As shown in Fig. 2, the body 10 is crushed evenly all the way to the ends. As a result, it is possible to prevent gaps from being created at both widthwise ends of the body 10 that cannot be crushed, and it is possible to prevent the contents from remaining in these gaps.

[0015] Furthermore, by making the film material relatively thin, between 30 μm and 250 μm, the amount of material used to form the film material can be reduced, and the layer structure of the film material can be simplified, thereby reducing manufacturing costs.

[0016] Furthermore, since the film material is thin and 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.

[0017] 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 can form the ruled lines 14. 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]

[0018] Using the tube containers according to Examples 1 and 2 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.

[0019] Example 1 1 was produced as Example 1. The film material for the body was a multilayer film in which PET (12 μm) / NY (15 μm) / LLDPE (100 μm) were laminated in this order from the outer layer of the body.

[0020] 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) / NY (15 μm) / LLDPE (50 μm) were laminated in this order from the outer layer of the body.

[0021] (Comparative Examples 1 to 5) As Comparative Examples 1 to 4, commercially available tube containers using laminated multilayer film as the film material were used. As Comparative Example 5, a commercially available tube container using blow-molded single-layer film as the film material was used. In the tube containers of Comparative Examples 1 to 3 and 5, the film material had a thickness of 250 μm or more, so no creases could be formed. In the tube container of Comparative Example 4, the film material had a thickness of 250 μm or less, but no creases were formed.

[0022] Nine tube containers each according to Examples 1 and 2 and Comparative Examples 1 to 5 were prepared without any contents, 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 Figures 2 and 3, 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 and the measured gap width W. The value of gap width W is the average value of the gap width W values ​​obtained from the nine tube containers.

[0023] [Table 1]

[0024] As shown in Table 1, in the tube containers of Examples 1 and 2, in which the film material had a thickness of 30 μm or more and 250 μm or less and the score lines 14 were provided, the gap width W was a small value of 0.83 mm or less. On the other hand, in the tube containers of Comparative Examples 1 to 5, which did not have the score lines 14, the gap width W was a large value of 2.10 mm or less. From these results, it was confirmed that by setting the film material thickness to 30 μm or more and 250 μm or less and providing score lines 14 in the body portion 10, the gap at the width direction end of the body portion 10 can be reduced, thereby preventing the contents from remaining in the body portion. The gap width W of the tube containers of Examples 1 and 2 before providing score lines was 1.60 mm and 0.90 mm, respectively. [Industrial Applicability]

[0025] The present invention can be used for packaging containers that can be filled with medicines, cosmetics, food, etc. [Explanation of symbols]

[0026] 10. Torso 11 Bottom 13 Laminating section 14 Ruled Lines 20 Spout part 30 Shoulder 100 tube containers

Claims

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 The thickness is 30 μm or more and 250 μm or less, The body portion is a bottom portion at the one end, the bottom portion being closed by bonding an area across the width of the body portion; A crease extending in the length direction of the body portion is formed between the end portion and the other end in the width direction of the bottom portion, The crease is formed by pressing the film material and is in contact with the bottom and the other end of the body portion. Tube container.

2. A method for manufacturing a tube container according to claim 1, forming a score line on the body portion by hot pressing the body portion at a temperature equal to or lower than the melting point of the film material forming the body portion; A method for manufacturing tube containers.

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