JP2003285857A - Hermetic vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hermetic vessel to store liquid such as beverage which has a plastic cap of high barrier property and excellent hermetic property even when the vessel is heated to around 80°C. <P>SOLUTION: The cap 20 has a contact ring 26 on a lower side of a top surface part 22 between a cylindrical skirt part 23 and a cylindrical inner ring 24 and an outer ring 27 on an inner root part of the cylindrical skirt part 23. In a body vessel 10, by fitting the cap 20 into a neck part to close an opening part 16, at least an inner side of a vertical wall body 12 of the neck part 11 of the body vessel 10 is brought into line-contact in section with the cylindrical inner ring 24, a horizontal top plate part 14 of the neck part 11 of the body vessel 10 is brought into point-contact in section with the contact ring 26, and a round part 15 of the horizontal top plate part 14 of the neck part 11 of the body vessel 10 is brought into point-contact in section with the outer ring 27. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for storing a liquid such as a drink using a plastic cap having a high barrier property. The present invention also relates to a hermetically sealed container having a cap structure having excellent sealing performance. 2. Description of the Related Art Conventionally, as shown in FIG. 1, a main body container 10 provided with a neck portion 11 having a generally circular opening portion 16 and a cap for closing the opening portion 16 of the main body container 10. 20 is known. The cap shown in FIG. 3 is often used as the cap. That is, the top surface portion 22, the cylindrical skirt portion 23 provided vertically downward from the peripheral end of the top surface portion 22, and the cylindrical skirt portion 2
3, a locking projection 25, and a cylindrical inner ring 24 provided vertically below the top surface 22 at an equal distance from the peripheral end of the top surface 22 to the inside of the top surface 22. Etc. The main body container 10 is formed by molding from glass or plastic, the neck portion 11 has an opening portion 16 formed by surrounding the vertical wall body 12, and the vertical wall body 12 is formed.
Is provided with a locking projection 13 outside. As shown in FIG. 3, a cap 20 is attached to the neck 11 of the container body 10.
To close the lid. At this time, cap 2
0 'of the skirt 23 and the container body 10
Is engaged with the locking projection 13 of the neck portion 11 so that the cap 20 'does not come out upward, and at the same time, the cylindrical inner ring 24 is pushed into the neck portion 11 so that the contents do not leak. Sealed. In order to improve the sealing performance, the top surface 2 between the cylindrical skirt portion 25 and the cylindrical inner ring 24 is required.
Protrusion (hereinafter, referred to as a contact ring 26) is provided on the lower surface of 2. As shown in FIG.
When seen in a cross-sectional view, the contact ring 26 comes close to a point contact (hereinafter referred to as a cross-section point contact) of the contact ring 26 and the horizontal top surface portion 14 of the neck portion, thereby increasing the contact pressure and improving the sealing. At this time, the main container 10
The cylindrical inner ring 24 is pushed into the inside of the vertical wall body 12 of the neck portion 11, but is in line contact (hereinafter referred to as cross-sectional line contact) when viewed in a cross-sectional view. [0004] Usually, the cap 20 'is made of polyethylene,
It is made of a polyolefin resin such as a polypropylene resin, and has a poor gas barrier property. Therefore, when gas barrier property is required, an aluminum foil or the like is provided on the lower surface of the top surface 22 formed by the inner ring 24 in the cap 20 ′. A barrier film label 30 such as a gas barrier plastic film is integrally formed and laminated. However, the barrier film label 30
Are required to be more tightly sealed, and the contact ring 26 and the inner ring 2
In the case of 4, the adhesion is insufficient. An attempt was made to extend the inner ring 24 to increase the number of contact portions to maintain the adhesion. At this time, the frictional resistance increases, and at the same time, the locking projection 25 of the skirt 23 of the cap 20 ′ and the container body 1
This means is not appropriate because it becomes difficult to engage the 0-neck portion 11 with the locking projection 13 and sacrifice workability. In some cases, a liquid is used for the contents and the container is hot-filled (heat of about 80 ° C.), but in this state, the sealing performance may be impaired. [0006] An object of the present invention is to provide a container using a plastic cap having a barrier film label, the container having a sealing property, particularly at 80 ° C.
An object of the present invention is to provide a hermetically sealed container which is excellent in hermeticity even when heated below or below. According to the present invention, in order to achieve the above object, according to the present invention, a top surface is provided and provided vertically downward from a peripheral end of the top surface. A cylindrical skirt portion, a cylindrical inner ring provided vertically below the position of the top surface portion at an equal distance inward of the top surface portion from the peripheral end of the top surface portion, and a cylindrical inner A cap consisting of a barrier film label provided on the lower surface of the top surface formed by the ring, and a main body container provided with a neck portion having an opening portion, wherein the neck portion having an opening portion of the main body container is formed by the above-described method. In a container that can be closed with a cap,
The cap is a cap provided with a contact ring on a lower surface of a top surface portion between the cylindrical skirt portion and the cylindrical inner ring, and an outer ring at an inner root portion of the cylindrical skirt portion. The container is surrounded by a vertical wall having a cylindrical thickness, and the upper end of the vertical wall is formed with a cylindrical opening, and the upper end of the vertical wall has a horizontal parallel to the top surface. A main body container having a neck portion provided with a top surface portion, an outer end of a horizontal top surface portion with a rounded portion, and a locking projection on a lower outer side of a vertical wall body. By closing the opening portion by inserting the inner ring, at least the inner side of the vertical wall of the neck portion of the main body container and the cylindrical inner ring come into line contact with each other, and the horizontal top surface portion of the neck portion of the main body container and the contact ring And the cross-section point contact In which the rounded portion and the outer ring of the horizontal top surface of the neck of the main container has a sealable containers, characterized in that it contacts cross point. FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described in detail with reference to FIG. <Example> The main body container 10 was produced by injection molding using a polyester resin. The neck 11 of the main container 10 is surrounded by a vertical wall 12 having a cylindrical thickness, and the upper end of the vertical wall 12 has a cylindrical opening 1.
6 are formed. The upper end of the vertical wall 12 has a horizontal top 14 parallel to the top 22, and the outer end of the horizontal top 15 has a rounded portion 15. Further, a locking projection 13 is provided below and below the vertical wall body 12. The cap 20 is manufactured by injection molding using a polyethylene resin. The top surface 22 and the top surface 2
2, a cylindrical skirt portion 23 provided vertically downward from the peripheral end portion, and a protruding portion 25 is provided inside the distal end of the cylindrical skirt portion 23. In addition, a cylindrical inner ring 24 is provided vertically below the position of the top surface 22 at an equal distance from the peripheral end of the top surface 22 to the inside of the top surface 22. A contact ring 26, which is a protruding projection, is provided on a substantially central lower surface of the top surface portion 22 between the cylindrical skirt portion 23 and the cylindrical inner ring 24. Further, an outer ring 27 is provided at an inner root portion of the cylindrical skirt portion 23. [0010] A barrier film label 30 is integrally formed and laminated on the lower surface of the top surface 22 formed by surrounding the cylindrical inner ring 24. In addition, metaxylene adipamide-nylon (MXD-
Ny) was selected, and a three-layer sheet composed of polyethylene / MXD-Ny / polyethylene was used as the barrier film label 30. The cap 20 was fitted into the neck portion 11 of the main body container 10 having the opening 16, and the opening 16 was closed to complete the container 1. At this time, the locking projection 25 of the skirt 23 of the cap 20 and the container body 1
The engagement projection 13 of the neck portion 11 is engaged with the cap 21 so that the cap 21 does not come off. At the same time, the top horizontal part 14 of the main body container 10 comes into contact with the contact 26 of the cap 20, and the top horizontal part 14 of the main body container 10
Of the cap 20 and the outer ring 27 of the cap 20 come into contact with each other. In addition, the cylindrical inner ring 24
Is pushed inside the vertical wall 12 of the neck 11. Thus, the container 1 having excellent sealing properties was produced. The outer ring 27 is also a contact ring 2
6, the outer ring 27 and the inner ring 24
The upper end of the vertical wall 13 of the main container 10 is pushed in between the outer ring 27 and the main container 1.
0 is a cross-sectional point contact with the rounded portion 27 of the horizontal portion 16,
The contact pressure becomes stronger than the cross-sectional point contact of the contact ring 26. Further, since the outer ring 27 has a root portion at the cylindrical skirt portion 23, when the upper end of the vertical wall 13 of the main body container 10 is pushed in, the force to return the skirt portion 23 to the original position is generated. Strongest in part 23. As described above, at least the line contact with the inner ring 24 and the point contact at the two places of the contact ring 26 and the outer ring 27 made it possible to improve the sealing performance. The body container 10 was hot-filled with juice at 80 ° C. and closed with the cap 20 described above. Although the present invention has been described with respect to a cap which is fitted and closed, a similar effect can be expected with a screw type cap in terms of hermeticity. According to the present invention having the above construction, the following effects can be obtained. That is, a container using a plastic cap having a barrier film label,
Even if the container was heated to around 80 ° C. or less, it was possible to obtain a hermetically sealed container having excellent hermeticity. Therefore, the present invention exerts an excellent practical effect in applications requiring hermeticity such as a container having a barrier property.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a container including a main body container and a cap according to an embodiment of the present invention and a conventional example. FIG. 2 is a cross-sectional view taken along a center line A-a 'of the main container of FIG. 1 taken along a center point A of the cap and showing the embodiment of the present invention in a state where the cap is fitted in the main body container. It is. 3 is a cross-sectional view taken along a line aa 'of FIG. 1 taken along a center point A of the cap and a center point B of the main body container, and shows a conventional example in which the cap is fitted into the main body container. [Description of Signs] 1, 2 ... container 10 ... body container, 11 ... neck part 12 ... vertical wall body, 13 ... locking projection 14 ... horizontal top surface part, 15 ... rounded part 16 ... opening part 20 ... cap, 20 ' ... Cap 22 ... Top surface part 23 ... Skirt part 24 ... Inner ring 25 ... Locking projection 26 ... Contact ring 27 ... Outer ring 30 ... Barrier film label

Claims (1)

Claims: 1. A top surface portion, a cylindrical skirt portion provided vertically downward from a peripheral end portion of the top surface portion, and an inner portion of the top surface portion from the peripheral end portion of the top surface portion. A cylindrical inner ring provided vertically downward at the position of the top surface portion at an equal distance from the other, and a barrier film label provided on the lower surface of the top surface portion formed by surrounding the cylindrical inner ring. A container comprising a cap and a main body container provided with a neck portion having an opening portion, wherein the neck portion having the opening portion of the main body container can be closed with the cap, wherein the cap has the cylindrical skirt portion and the cylindrical shape. A cap provided with a contact ring on the lower surface of the top surface between the inner ring and the outer ring at the inner root of the cylindrical skirt, and the main container is a vertical wall having a cylindrical thickness. Surrounded by The upper end of the vertical wall is formed with a cylindrical opening. The upper end of the vertical wall has a horizontal top parallel to the top surface, the outer end of the horizontal top has a rounded portion, and A main body container having a neck portion provided with a locking projection on a lower outer side of the vertical wall body, wherein the main body container has at least a main body container by fitting the cap into the neck portion and closing the opening. The inner surface of the vertical wall of the neck portion and the cylindrical inner ring make cross-sectional line contact, the horizontal top surface of the neck portion of the main container and the contact ring make cross-sectional point contact, and the horizontal top surface of the neck portion of the main container. Characterized in that the rounded part of the outer ring and the outer ring can make point contact with each other in cross section.