JP2020179865A - Tube container - Google Patents

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

The present invention relates to a tube container.

Tube containers that can be filled and packaged with pharmaceuticals, cosmetics, foods, etc. are known. For example, Patent Document 1 discloses a tube container including a spout portion, a shoulder portion, and a body portion. In the tube container disclosed in Patent Document 1, a highly rigid body portion is formed by using a film material having a thickness of about 200 μm to 400 μm and having a relatively high elastic modulus (strong elasticity) made of a resin material. As a result, a phenomenon called "airbag" occurs in which air flows inward of the body by returning the body to its original shape after squeezing out the contents. For this reason, in tube containers, a film material with a strong stiffness is actively used with an emphasis on airbag performance.

Japanese Unexamined Patent Publication No. 2016-199280

In such a tube container, there is a problem that a small amount of the contents remains in the gaps at both ends in the width direction of the body when the contents are squeezed out due to the strength of the film material. FIG. 2 shows a cross-sectional view of a body portion for squeezing out the contents, cut along a plane orthogonal to the length direction. As shown in FIG. 2, due to the strength of the film material, even if the body is crushed when squeezing out the contents, gaps that cannot be crushed are generated at both ends in the width direction, that is, around the bent portion of the film material. There was a problem that the contents could not be used up to the end because a small amount of the contents remained in this gap.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a tube container capable of suppressing residual contents at the widthwise end of the body portion.

One aspect of the present invention for solving the above problems is a tubular body portion made of a film material containing a resin material, one end of which is closed and capable of accommodating the contents, and the other end of the body portion. A tube container including a spout portion capable of closing the other end of the attached body portion, the film material having a thickness of 30 μm or more and 200 μm or less, and a loop stiffness value (loop length 60 mm) in the width direction of the body portion. ) Is 600 mN or less, which is a tube container.

According to the present invention, it is possible to provide a tube container capable of suppressing residual contents at the widthwise end of the body portion.

Front view of a tube container according to an embodiment of the present invention Cross-sectional view of a tube container according to the prior art

The tube container according to the embodiment of the present invention will be described with reference to the drawings. The tube container 100 according to the embodiment of the present invention includes a body portion 10 having one end closed and a spout portion 20 attached to the other end of the body portion 10. FIG. 1 is a front view of the tube container 100.

The spout portion 20 is a member attached to the other end of the body portion 10 and capable of closing the other end of the body portion 10. As an example, the spout portion 20 has a hollow shoulder portion 21 whose outer diameter decreases as the distance from the other end of the body portion 10 increases, and a tubular portion 22 extending from the side of the shoulder portion 21 opposite to the body portion 10. And include. The other end of the body portion 10 can be closed by attaching a cap or the like (not shown) to the tubular portion 22.

The body portion 10 is a tubular member whose one end is closed and can accommodate the contents, and is formed by using a film material containing a resin material. The body portion 10 includes, at one end, a bottom portion 11 in which a region extending in the width direction of the body portion 10 is adhered and closed. Further, as an example, the body portion 10 includes a bonding portion 13 formed by bonding the ends of the body portion 10 in the width direction at the center portion in the width direction. As a method of laminating the film material in the laminating portion 13, a well-known method such as a gassho pasting in which the inner surfaces of the film materials are bonded to each other or an envelope pasting in which the inner surface and the outer surface of the film material are bonded can be used.

The film material used for the body portion 10 has a thickness of 30 μm or more and 200 μm or less, 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. The rigidity of the body portion 10 can be reduced by making the thickness of the film material thinner than the thickness of the film material (about 200 μm to 400 μm) used for the tube container according to the prior art, and setting the loop stiffness value to 600 mN or less. Therefore, when the contents are squeezed out, the radius of curvature of the widthwise end portion of the body portion 10, that is, the bent portion of the film material can be reduced, and the end portion of the body portion 10 can be crushed evenly. As a result, it is possible to prevent the generation of gaps that cannot be completely crushed at both ends of the body portion 10 in the width direction, and it is possible to prevent the contents from remaining in the gaps.

Further, since the film material has a relatively thin thickness of 30 μm or more and 200 μm or less and the loop stiffness value is suppressed to 600 mN or less, less material is required to form the film material, and the layer structure of the film material is simplified. The cost can be suppressed.

Further, since the elasticity of the film material is low, the tube container 100 can be manufactured by using a bag making machine capable of manufacturing a bag-shaped packaging container without using a relatively expensive tubing machine, and the manufacturing cost is suppressed. be able to.

The film material for forming the body portion 10 may be a single-layer film or a multilayer film formed by laminating or extrusion as long as it has the above-mentioned thickness and loop stiffness value. The resin material contained in the film material is not particularly limited, and for example, polyethylene terephthalate (PET), nylon (NY), linear (linear) low density polyethylene (LLDPE) and the like can be used. Further, the film member may include a well-known functional film according to the function required for the body portion 10. For example, a film containing an aluminum foil, an EVOH resin, or the like is laminated in order to impart gas barrier properties. May be good.

Using the tube containers according to Examples 1 to 5 and Comparative Examples 1 to 5, the size of the gap generated at the end in the width direction when the body 10 was crushed was evaluated.

(Example 1)
As Example 1, the tube container shown in FIG. 1 was manufactured. As the film material for the body portion, a multilayer film in which PET (25 μm) / PET (12 μm) / LLDPE (150 μm) was laminated in order from the outer layer of the body portion was used.

(Example 2)
The difference between the second embodiment and the first embodiment is the layer structure of the film material. As the film material, a multilayer film in which PET (12 μm) / aluminum (9 μm) / NY (25 μm) / LLDPE (100 μm) was laminated in order from the outer layer of the body was used.

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

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

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

(Comparative Examples 1 to 5)
As Comparative Examples 1 to 4, a commercially available tube container using a laminated multilayer film as a film material was used. Further, as Comparative Example 5, a commercially available tube container using a blow-molded single-layer film as a film material was used.

Nine tube containers according to Examples 1 to 5 and Comparative Examples 1 to 5 which are not filled with the contents were prepared, and the pressure-sensitive paper was inserted into the body from the bottom. After that, three adult men pinched and crushed the torso with the thumb and forefinger, three for each level tube container, and measured the area where the pressure-sensitive paper did not develop color, and applied it to the widthwise end of the torso. The generated gap width W was used. As shown in FIG. 2, the gap width W is the length of the gap generated at the widthwise end portion of the body portion in the width direction of the body portion. 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 value of the gap width W is an average value of the values of the gap width W obtained from the nine tube containers.

As shown in Table 1, in the tube container according to Examples 1 to 5 in which the thickness of the film material is 30 μm or more and 200 μm or less and the loop stiffness value is 600 mN or less, the value of the gap width W is as small as 2.00 mm or less. It was a value. On the other hand, in the tube containers according to Comparative Examples 1 to 5 in which the thickness of the film material was larger than 200 μm and the loop stiffness value was larger than 600 mN, the value of the gap width W was a large value of 2.10 mm or more. From this result, it was found 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 widthwise end of the body portion was reduced and the contents remained on the body portion. It was confirmed that it could be suppressed.

The present invention can be used in a packaging container that can be filled with pharmaceuticals, cosmetics, foods, and the like.

10 Body part 11 Bottom part 13 Laminated part 20 Injection outlet part 30 Shoulder part 100 Tube container

Claims (1)

A tubular body made of a film material containing a resin material, one end of which can be closed to accommodate the contents, and a tubular body.
A tube container including 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 200 μm or less, and the loop stiffness value (loop length 60 mm) in the width direction of the body portion is 600 mN or less.
Tube container.

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