JP2020179938A - Tube container - Google Patents

Abstract

To provide a tube container which dispenses with a large force for drawing contents while suppressing flowing of gas into the inside.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 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. For this reason, a phenomenon called "airbag" occurs in which air flows into the inside of the body by deforming the body and squeezing out the contents and then returning the body to its original shape. When the contents are squeezed out again, the contents are pushed out from the spout part by the pressure of the inflowing gas by pushing the gas that has flowed in together with the body part.

Japanese Unexamined Patent Publication No. 2016-199280

However, in such a tube container, there is a problem that quality deterioration progresses due to oxidation or the like when the inflowing air comes into contact with the contents. Further, when squeezing out the contents, it is necessary to close the opening of the spout with the contents in order to push out the contents by using the inflowing gas. Therefore, when using the tube, it is necessary to turn the spout portion downward, which limits the posture of the tube container during use, which causes a problem that convenience is reduced. Further, there is a problem that when the content is small, a blowing phenomenon occurs in which the content suddenly pops out from the spout portion.

On the other hand, in a tube container using a body made of a layer mainly made of a material such as aluminum having a low elastic modulus and a high deadhold property, air bag does not occur, but the body is made of aluminum or the like to squeeze out the contents. It is necessary to pinch and deform the container with a force that exceeds the relatively large bending yield force of the layer. For this reason, there is a problem that it becomes difficult to squeeze out when a material having a particularly high viscosity is used as the content. In addition, there is a problem that minute holes (pinholes) may be generated in the body due to repeated use.

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 that does not require a large force to squeeze out the contents while suppressing the inflow of gas into the inside.

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, wherein the film material has a loop stiffness value (loop length 60 mm) in the width direction of the body portion of 600 mN or less. Is.

According to the present invention, it is possible to provide a tube container that does not require a large force to squeeze out the contents while suppressing the inflow of gas into the inside.

Front view of a tube container according to an embodiment of the present invention Cross-sectional view around the spout Perspective view of the valve

<First Embodiment>
The tube container according to the first embodiment of the present invention will be described with reference to the drawings. The tube container 100 according to the first 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 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 using a material having a small loop stiffness value and low elasticity as the film material, the rigidity of the formed body portion 10 can be reduced. Therefore, it is possible to prevent the body portion 10 from returning to the original shape after the body portion 10 formed by using a film material having a loop stiffness value of 600 mN or less is deformed and the contents are squeezed out. As a result, it is possible to suppress the generation of airbags in which gas flows into the body portion 10. As a result, deterioration of the quality of the contents due to the inflowing gas can be suppressed, the contents can be squeezed out without turning the spout 20 downward, and the occurrence of a sudden blowout phenomenon of the contents is suppressed. To.

In addition, since the film material contains resin, it can be deformed with a smaller force than the body made of a layer mainly composed of a material with high deadhold properties such as aluminum, and the material has high viscosity. It is easy to squeeze out even if it is a product. Further, it is possible to suppress the generation of minute holes in the film material by repeating the use.

Further, since the loop stiffness value of the film material 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, so that the manufacturing 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 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 material may contain 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.

The thickness of the film material is preferably thinner than that of the film material used for a general laminated tube container in order to reduce the loop stiffness value, and can be, for example, about 30 μm or more and 250 μm or less.

<Second embodiment>
The tube container according to the second embodiment of the present invention will be described with reference to the drawings. The same or corresponding configurations as those of the tube container according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate. The tube container 101 according to the second embodiment of the present invention includes a body portion 10 having one end closed and a spout portion 20a attached to the other end of the body portion 10. Further, the spout portion 20a includes a valve 23. FIG. 2 is a cross-sectional view of the vicinity of the spout portion 20a of the tube container 101. FIG. 3 is a perspective view of the valve 23.

The valve 23 is generally a valve having a function of improving the drainage of highly viscous contents, but the effect of non-return is limited. However, in the present embodiment, by providing this valve at the spout portion 20 of the first embodiment, the occurrence of airbag can be suppressed more reliably. As an example, the valve 23 is a member provided with a slit 23a in the center of a plate material made of a soft material, and is attached to the inside of the tubular portion 22. As the soft material forming the slit 23a, for example, a silicon resin can be used.

The valve 23 is deformed so that the central portion bends outward inside the tubular portion 22 due to the contents squeezed from the body portion 10. As a result, an opening is formed by opening the slit 23a formed in the center, and the contents can flow out through the opening. When the contents have been squeezed out, the bending of the valve 23 is eliminated. As a result, the slit 23a of the valve 23 is closed. In the tube container 101, the loop stiffness value of the body portion 10 is 600 mN or less to prevent the body portion 10 from returning to the original shape, and the slit 23a is closed to prevent the inside of the body portion 10 from returning to the original shape. It more reliably regulates the inflow of air into the air bag and suppresses the occurrence of airbags.

As described above, since the tube container 101 includes the body portion 10 and the spout portion 20a provided with the valve 23, the occurrence of airbag can be suppressed more effectively than the tube container 100. In particular, even when a valve having a simple structure having a limited check effect such as the valve 23 is used, the occurrence of airbag can be effectively suppressed in the entire tube container 101. Therefore, it is possible to suppress the manufacturing cost of the tube container 101.

The aspect of the valve 23 is not limited to the above. As the valve 23, for example, a plurality of slits 23a may be formed, or a well-known valve (check valve) having a check effect such as a ball type or a spring type may be used.

Experiments were conducted on the presence or absence of airbag generation using the tube containers according to Examples 1 to 10 and Comparative Examples 1 to 10.

(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. The tube container had an inner peripheral diameter (caliber) of the tubular portion 22 of 16 mm, a length of the body portion 10 of 150 mm, and a capacity of the body portion 10 of 100 mL.

(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.

(Examples 6 to 10)
A valve 23 was provided at the spout portion of the tube container according to each of Examples 1 to 5, and the tube container according to Examples 6 to 10 was provided. The valve 23 is a circular plate material having a thickness of 0.5 to 3 mm made of silicon resin, and has one slit 23a having a thickness of 3 to 10 mm in the center.

(Comparative Example 1)
The difference between Comparative Example 1 and Example 1 is the molding method of the tube container and the layer structure of the film material. The tube container according to Comparative Example 1 was manufactured by extrusion molding, and the film material formed by this was a PE (390 μm) single-layer film.

(Comparative Example 2)
The difference between Comparative Example 2 and Example 1 is the layer structure of the film material. The film material is laminated by laminating PE (40 μm) / PE (25 μm) / PE (50 μm) / PE (15 μm) / PET (12 μm) / PET (12 μm) / PE (150 μm) in order from the outer layer of the body. A molded multilayer film was used.

(Comparative Example 3)
The difference between Comparative Example 3 and Example 1 is the layer structure of the film material. The film material is laminated by laminating PE (40 μm) / PE (15 μm) / PE (40 μm) / PE (15 μm) / PET (12 μm) / PET (12 μm) / PE (130 μm) in order from the outer layer of the body. A molded multilayer film was used.

(Comparative Example 4)
The difference between Comparative Example 4 and Example 1 is the layer structure of the film material. The film material is laminated by laminating PE (40 μm) / PE (15 μm) / EVOH (15 μm) / PE (15 μm) / PE (80 μm) / PET (12 μm) / PE (60 μm) in order from the outer layer of the body. A molded multilayer film was used.

(Comparative Example 5)
The difference between Comparative Example 5 and Example 1 is the molding method of the tube container and the layer structure of the film material. The tube container according to Comparative Example 5 was manufactured by extrusion molding, and the film material formed by this was a PE (370 μm) single-layer film.

(Comparative Examples 6 to 10)
The same valve 23 as in Examples 6 to 10 was provided at the spout portion of the tube container according to each of Comparative Examples 1 to 5 to obtain a tube container according to Comparative Examples 6 to 10.

(Experiment 1)
After filling the tube containers according to Examples 1 to 10 and Comparative Examples 1 to 5 with water as contents, the filled water was squeezed out from the body 10 by 10% of the volume. When the content 1 was squeezed out and left for 10 seconds, it was examined whether or not airbags were generated.

(Experiment 2)
After filling the tube container according to Examples 1 to 10 with water, the filled water was squeezed out from the body portion 10 by 50% of the capacity. Then, as shown in FIG. 1, the tube container is left upright with the spout portion located above the torso as shown in FIG. It was investigated whether or not an airbag was generated when moving in.

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 presence or absence of airbag generation in Experiments 1 and 2.

As shown in Table 1, the following was confirmed in Experiment 1. It was confirmed that in the tube containers according to Examples 1 to 10 in which the loop stiffness value of the film material was 600 mN or less, airbags did not occur because the rigidity of the formed body portion was low. On the other hand, it was confirmed that in the tube containers according to Comparative Examples 1 to 10 in which the loop stiffness value of the film material was larger than 600 mN, airbags were generated due to the high rigidity of the formed body portion.

In Experiment 2, the following was confirmed. In the tube container according to Examples 1 to 5 in which the valve was not provided, since more contents were squeezed out than in Experiment 1, a slight force was generated to restore the shape of the tube container, and air was released. It was confirmed that there was an inflow, but the amount of inflow was very small and was not a problem. Further, it was confirmed that the occurrence of airbag was suppressed in the tube container according to Examples 6 to 10 provided with the valve. Further, it was confirmed that the tube containers according to Comparative Examples 1 to 10 could not suppress the occurrence of airbags regardless of the presence or absence of a valve.

From the above results, it was confirmed that the tube containers according to Examples 1 to 10 can suitably suppress the generation of airbags.

The tube container having a smaller inner circumference of the tubular portion than the tube containers 100 and 101 used in the experiment can weaken the force of the air passing through the tubular portion, and is therefore compared with the tube container used in the experiment. As a result, a higher airbag suppression effect can be obtained.

Further, in the tube container having a smaller body capacity than the tube containers 100 and 101 used in the experiment, the amount and momentum of the movement of the contents in the tube container can be reduced, so that the spout is accompanied by the movement of the contents. It is possible to suppress the suction of air from the part, and a higher effect of suppressing airbags can be obtained as compared with the tube container used in the experiment.

Furthermore, even in a tube container filled with contents having a viscosity higher than that of water used in the experiment, the momentum of movement of the contents in the tube container can be reduced due to the high viscosity of the contents. It is possible to suppress the suction of air from the spout portion due to movement, and a higher airbag suppression effect can be obtained as compared with the tube container used in the experiment.

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 Laminating part 20, 20a Inlet part 23 Valve 30 Shoulder part 100, 101 Tube container

Claims (3)

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 loop stiffness value (loop length 60 mm) in the width direction of the body portion is 600 mN or less.
Tube container. The tube container according to claim 1, wherein the spout portion includes a valve. According to claim 2, the valve regulates the inflow of air into the body while the contents can flow out from the body and the contents are not flowing out. The tube container described.

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