JP2012153401A - Container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container whose barrier properties can be kept while being reduced in weight.SOLUTION: In the container 1 which includes a cylindrical barrel 11 formed of a laminate film containing a barrier layer 11a, and a bottom member 13 for closing a lower end opening of the cylindrical barrel 11, the bottom member 13 is formed by compression molding and also formed into a layered structure including a barrier layer 13a, and the respective barrier layers 11a and 13a of the bottom member 13 and the cylindrical barrel 11 radially overlap each other.

Description

  The present invention relates to a container.

  In the container for storing the contents, for example, as shown in Patent Document 1 below, the body was formed by rolling a film material into a cylindrical shape, and the lower end opening of the body was formed by injection molding. It is conceivable to reduce the weight by applying a configuration having a bottom plate member.

JP 2006-36218 A

  However, in the conventional container described above, for example, gas (oxygen, carbon dioxide, etc.), moisture such as moisture, light such as ultraviolet rays, odor components of contents, etc. while reducing the weight by a simple manufacturing method (process) There is room for improvement in suppressing permeation, that is, increasing the barrier property.

  Accordingly, the present invention has been made in view of the above-described circumstances, and its object is to provide a container capable of maintaining barrier properties while achieving weight reduction by a simple manufacturing method (process). It is to be.

In order to solve the above problems, the present invention proposes the following means.
A container according to the present invention is a container including a cylindrical body portion made of a laminated film including a barrier layer, and a bottom member that closes a lower end opening of the body portion, and the bottom member is formed by compression molding. It is formed and it is set as the laminated structure containing a barrier layer, The said barrier layers of the said bottom member and the said trunk | drum are overlapped in radial direction, It is characterized by the above-mentioned.

Due to such characteristics, the body portion is formed of a laminated film, so that the body portion can be made thinner and the weight of the container can be reduced.
In particular, in the container according to the present invention, since the trunk and the bottom member have a laminated structure including a barrier layer, the barrier property can be maintained after achieving weight reduction. As a result, the contents stored in the container can be prevented from being altered. Moreover, since the barrier layers of the bottom member and the body portion are overlapped in the radial direction, the barrier property can be reliably maintained.
Furthermore, by forming the bottom member by compression molding, for example, the rigidity of the bottom member can be increased as compared with the case where the bottom member is integrally formed with the body portion with a laminated film, so the bottom member is used as a grounding portion. A self-supporting container can be manufactured.
In addition, since the bottom member is formed by compression molding, for example, a general method of forming a header member of a tube container can be used to easily manufacture the bottom member.

  Further, in the container of the present invention, a header member having a spout for pouring contents is provided at the upper end opening of the barrel portion, and the header member is formed by compression molding and has a barrier layer. The barrier layer of each of the header member and the body portion is overlapped in the radial direction.

In this case, since the header member has a laminated structure including the barrier layer, the barrier property is maintained over the entire region of the container, and the contents can be more reliably prevented from being altered. Moreover, since the barrier layers of the header member and the body portion are overlapped in the radial direction, the barrier property can be reliably maintained.
Moreover, by forming the header member by compression molding, for example, a general method for forming the header member of the tube container can be used for easy manufacture.

  According to the container according to the present invention, the barrier property can be maintained while reducing the weight by a simple manufacturing method.

It is a side view of the container in the embodiment of the present invention. It is a side view which shows the other structure of a container.

Hereinafter, bottles according to embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the container 1 according to the present embodiment includes a cylindrical body 11, a cylindrical header member 12 provided at an upper end opening of the body 11, and a lower end opening of the body 11. And a bottom member 13 having a bottomed cylindrical shape, and these 11 to 13 are arranged in a state where their respective central axes are located on a common axis. Hereinafter, this common axis is referred to as a container axis O, and in the container 1 described above, the header member 12 side along the container axis O is referred to as an upper side, and the bottom member 13 side is referred to as a lower side. A direction perpendicular to the container axis O is referred to as a radial direction, and a direction around the container axis O is referred to as a circumferential direction.

  The trunk | drum 11 is formed by rolling the laminated | multilayer film which consists of a laminated structure with which the barrier layer 11a and the main material resin layer 11b were piled up in the thickness direction to a cylinder shape. Among the laminated films used in the present embodiment, the main material resin layer 11b is a resin such as polyethylene (PE) or polypropylene (PP). In addition, the barrier layer 11a is a resin having a barrier property that restricts transmission of gas (oxygen, carbon dioxide, etc.), moisture such as moisture, light such as ultraviolet rays, odor components of contents, and the like. It is a resin appropriately selected according to the product. For example, when exhibiting a barrier property against gas, a nylon-based resin or an ethylene vinyl alcohol copolymer resin can be used. When exhibiting a barrier property against moisture, a cyclic polyolefin-based resin or the like can be used. For example, a resin layer or a colored resin layer containing an ultraviolet absorber may be used.

  And the outer layer part which comprises the outer surface of the trunk | drum 11, and the inner layer part which comprises an inner surface are formed with the main material resin layer 11b mentioned above, The middle layer part pinched | interposed between these outer layer parts and inner layer parts is The barrier layer 11a is formed.

  The header member 12 is integrally formed by compression molding, and is provided continuously with a mouth portion 16 having a spout 15 for pouring the contents accommodated in the container 1 and a lower end of the mouth portion 16. The shoulder portion 17 is gradually expanded in diameter as it goes downward, and the peripheral wall portion 18 is connected to the lower end of the shoulder portion 17.

  The header member 12 has a laminated structure in which a barrier layer 12a and a main material resin layer 12b are stacked in the thickness direction. The barrier layer 12a and the main material resin layer 12b have the same layer configuration as the laminated film that constitutes the body portion 11 described above, and an outer layer portion that constitutes the outer surface of the header member 12, and an inner layer portion that constitutes the inner surface. Are formed by the main material resin layer 12b described above, and an intermediate layer portion sandwiched between the outer layer portion and the inner layer portion is formed by the barrier layer 12a. Further, both end opening edges (the upper end edge of the mouth portion 16 and the lower end edge of the peripheral wall portion 18) of the header member 12 in the container axis O direction extend over the entire circumferential direction so that the barrier layer 12a is not exposed to the outside. The main material resin layer 12b is formed.

  The mouth portion 16 described above has a male screw portion 19 formed on the outer peripheral surface, and a cap (not shown) is detachably screwed to the male screw portion 19. In addition, you may comprise not only the external thread part 19 but a cap so that attachment or detachment is possible by undercut fitting.

  Moreover, the surrounding wall part 18 is formed in the cylinder shape extended along the container axis | shaft O direction, and the upper end part of the trunk | drum 11 mentioned above is heat-welded by the outer peripheral surface. And each barrier layer 12a, 11a of the surrounding wall part 18 and the trunk | drum 11 is piled up in radial direction. The peripheral wall portion 18 is formed with a step portion 21 formed so that the outer diameter of the peripheral wall portion 18 is reduced over the entire circumference in the circumferential direction. The step portion 21 is for accommodating the upper end portion of the body portion 11, and the depth in the radial direction is formed to be equal to the thickness of the body portion 11 in the radial direction. Thereby, the outer peripheral surface of the container 1 is formed flush with the shoulder portion 17 and the trunk portion 11.

  The bottom member 13 is integrally formed by compression molding, and has a raised bottom shape that is recessed upward. Specifically, the bottom member 13 includes a bottom wall portion 22 that closes the lower end opening of the body portion 11, and a peripheral wall portion 23 that is connected to the outer peripheral edge of the bottom wall portion 22. The bottom member 13 has a laminated structure in which a barrier layer 13a and a main material resin layer 13b are stacked in the thickness direction. The barrier layer 13a and the main material resin layer 13b have the same layer configuration as the header member 12 described above, and the outer layer portion constituting the outer surface of the bottom member 13 and the inner layer portion constituting the inner surface are the main components described above. An intermediate layer portion formed by the material resin layer 13b and sandwiched between the outer layer portion and the inner layer portion is formed by the barrier layer 13a. Moreover, the lower end opening edge (lower end edge of the surrounding wall part 23) of the bottom member 13 in the container axis O direction is formed of the main material resin layer 13b over the entire region so that the barrier layer 13a is not exposed to the outside.

The bottom wall portion 22 is formed in a disk shape, and is located above the lower end surface of the body portion 11 inside the body portion 11.
The peripheral wall portion 23 is formed in a cylindrical shape extending downward from the outer peripheral edge of the bottom wall portion 22, and the lower end portion of the body portion 11 described above is thermally welded to the outer peripheral surface thereof. And each barrier layer 13a, 11a of the surrounding wall part 23 and the trunk | drum 11 is piled up in radial direction. A stepped portion 24 is formed on the upper portion of the peripheral wall portion 23 so that the outer diameter of the peripheral wall portion 23 is reduced over the entire circumference in the circumferential direction. The step portion 24 is for accommodating the lower end portion of the trunk portion 11, and the depth in the radial direction is formed to be equal to the radial thickness of the trunk portion 11. Thus, the outer peripheral surface of the container 1 is formed flush with the peripheral wall portion 23 from the body portion 11. Further, the container 1 of the present embodiment can be self-supporting with the lower end surface of the peripheral wall portion 23 as the grounding portion 25.

Next, the manufacturing method of the container 1 mentioned above is demonstrated.
The container 1 of this embodiment welds the header member 12 and the trunk | drum 11 at the time of formation of the header member 12 by compression molding as mentioned above, and welds the bottom member 13 formed by compression molding to the trunk | drum 11 after that. It is formed by doing.

  First, the body 11 is formed. Specifically, the cylindrical trunk | drum 11 is formed by rounding the laminated | multilayer film which consists of a laminated structure mentioned above to a cylinder shape, overlapping both ends of one direction, and heat-welding. In addition, the trunk | drum 11 may be heat-welded mutually by abutting the both ends of one direction in a laminated | multilayer film.

  Subsequently, the header member 12 is formed. Specifically, a spare member in which the above-described barrier layer 12a is embedded in the main material resin layer 12b is supplied into a female mold that forms the header member 12, and the above-described body portion 11 is set in a male mold. . In this state, the male member is pushed into the female die to compress the preliminary member. Thereby, while the header member 12 is compression-molded, the peripheral wall part 18 of the header member 12 and the upper end part of the trunk | drum 11 are heat-welded. The spare member may be flat or dumpling.

Next, the bottom member 13 is formed. Specifically, in a state where the spare member is supplied into the female mold forming the header member 12, the male mold is pushed into the female mold and compression molded. Then, the peripheral wall part 23 of the bottom member 13 and the lower end part of the trunk | drum 11 are heat-welded. At this time, in the present embodiment, since the bottom wall portion 22 has a raised bottom shape positioned above the lower end of the body portion 11, the welding operation between the peripheral wall portion 23 and the body portion 11 is facilitated, and the production efficiency is improved. Can be improved.
The container 1 mentioned above is completed by the above.

Thus, according to this embodiment, since the trunk | drum 11 was comprised with the laminated | multilayer film, thickness reduction of the trunk | drum 11 is attained and the weight reduction of the container 1 can be achieved.
In particular, in the container 1 of this embodiment, since the trunk | drum 11 and the bottom member 13 become a laminated structure containing the barrier layers 11a and 13a, barrier property can be maintained after achieving weight reduction. As a result, it is possible to suppress the contents contained in the container 1 from being altered.
Moreover, since the barrier layers 11a and 13a of the bottom member 13 and the body 11 are overlapped in the radial direction, the barrier property can be reliably maintained.
Furthermore, since the header member 12 has a laminated structure including the barrier layer 12a, the barrier property can be maintained over the entire region of the container 1, and the contents can be more reliably prevented from being altered. Moreover, since the barrier layers 11a and 12a of the header member 12 and the body portion 11 are overlapped in the radial direction, the barrier property can be reliably maintained.
Here, since the edge of the header member 12 and the bottom member 13 is formed of the main material resin layers 12b and 13b, the barrier layers 12a and 13a can be protected. Thereby, it is possible to prevent the barrier layers 12a and 13a and the main material resin layers 12b and 13b from being separated, and to maintain the barrier property for a long period of time.

  Further, since the bottom member 13 is formed by compression molding, it can be easily manufactured by using a general method for forming a header member of a tube container, for example.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

  For example, in the above-described embodiment, the case where the bottom wall portion 22 is formed in the raised bottom shape positioned above the lower end surface of the trunk portion 11 is described. It may be located below the lower end surface. Specifically, as shown in FIG. 2, a bottom wall portion 43 and a peripheral wall portion 44 that extends upward from the outer peripheral edge of the bottom wall portion 43 and has an outer peripheral surface welded to the lower end portion of the body portion 11. The bottom member 45 may be formed. According to this configuration, the volume of the container 1 can be ensured after the container 1 is reduced in size as compared with the raised bottom shape described above.

In the above-described embodiment, the case where the body portion 11, the header member 12, and the bottom member 13 are thermally welded has been described. However, the present invention is not limited to thermal welding. That is, the body 11, the header member 12, and the bottom member 13 may be joined by various welding methods such as high-frequency welding and ultrasonic welding, adhesion by adhesive, and fusion.
In the above-described embodiment, the case has been described in which the container 1 is formed by a three-layer structure including the barrier layers 11a, 12a, and 13a. However, if the container 1 includes at least a barrier layer, two or four layers are formed. The above laminate may be used.

Furthermore, although embodiment mentioned above demonstrated the case where the header member 12 and the trunk | drum 11 were welded at the time of the formation process of the header member 12, not only this but it joins by the process separate from the formation process of the header member 12. It doesn't matter.
Further, the end faces of the header member 12 and the bottom member 13 may be formed so that the barrier layers 12a and 13a and the main material resin layers 12b and 13b are flush with each other.
In addition, the formation range of the barrier layer 12a in the header member 12 can be appropriately selected in consideration of the thickness thereof. For example, the barrier layer 12a may be disposed only on the shoulder portion without providing the barrier layer on the mouth portion formed relatively thick for cap attachment.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Container 11 ... Body part 11a ... Barrier layer 12 ... Header member 12a ... Barrier layer 13 ... Bottom member 13a ... Barrier layer 15 ... Spout

Claims (2)

A cylindrical body made of a laminated film including a barrier layer;
In a container provided with a bottom member that closes the lower end opening of the trunk,
The bottom member is formed by compression molding and has a laminated structure including a barrier layer,
The container in which the barrier layers of the bottom member and the body portion are overlapped in the radial direction. A header member having a spout for pouring out the contents is provided at the upper end opening of the trunk portion.
The header member is formed by compression molding and has a laminated structure including a barrier layer,
The container according to claim 1, wherein the barrier layers of the header member and the body portion are overlapped in the radial direction.

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