JP3688776B2 - Beverage container lid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid for a beverage container.
[0002]
[Prior art]
Conventionally, a beverage container having a structure in which an upper end opening of a cylindrical container is covered and sealed is used. This type of beverage container is filled with a beverage after the interior is sterilized to be aseptic.
[0003]
Conventionally, this type of lid has the following structure.
{Circle around (1)} A so-called peelable seal type (hereinafter referred to as membrane type) comprising a sheet in which a stretched film of PET (polyethylene terephthalate) is laminated on the surface of an aluminum foil or the like and an easy peel layer is provided on the surface in contact with the container. ) Lid. The lid is attached so as to close the upper end opening of the cylindrical container and is heat-welded.
(2) Cover the upper end opening of the container with a sheet, etc., provide an opening for drinking in the sheet, etc., and close the opening with a pull tab made of a small piece of PET / aluminum foil film with an easy peel layer. The lid that becomes.
(3) A lid formed by drawing aluminum foil.
(4) Manufactured by a so-called insert injection molding technique in which aluminum foil coated with PE (polyethylene) or the like is inserted into a mold in advance and a lid having a predetermined opening means is formed in the aluminum foil by injection molding. The lid to be done.
[0004]
[Problems to be solved by the invention]
However, the conventional lid has the following problems.
(1) In the membrane type lid as described in (1) above, the seal strength between the lid and the container must be increased in order to withstand the handling of goods during product transportation. There is an aspect that the unsealing strength at the time of removing from the sheet must be excessively weakened, and it is difficult to balance the two.
[0005]
Further, since the opening when the lid is removed from the container becomes too large, for example, when drinking a beverage in the container while walking, there is an inconvenience such as spilling the beverage.
[0006]
(2) In the case of the lid body to which the pull tab is attached as in the above (2), the problem of the above (1) is solved, but the pull tab is composed of a membrane type sheet. Gives a so-called cheap impression without a sense of quality.
(3) A product obtained by drawing the aluminum foil of (3) is expensive.
[0007]
(4) Although the method (4) has a gas barrier property, the coating of PE on the aluminum foil is complicated, and there is a problem that they are easily peeled off.
[0008]
(5) Most of the above conventional lids are removed from the beverage container after opening, and there is a problem in disposal. Even if the lid is not removed from the container, the opening is opened with the lid after opening. There is nothing that can be resealed.
[0009]
The present invention has been made in view of the above points, and its purpose is to withstand handling during product transportation, easy opening, excellent gas barrier properties, and high-class feeling even after opening. An object of the present invention is to provide a lid for a beverage container suitable for aseptic filling of a beverage, wherein the opening can be sealed with the lid.
[0010]
[Means for Solving the Problems]
The present invention has been made in order to solve the above problems, and is formed into a shape covering the upper end opening of a cylindrical container, and has a lid main body provided with an opening serving as a drinking mouth therein, and the opening. A thermoplastic resin lid of a beverage container, comprising a cap having a cap attached so as to be sealed and a pull tab connected to the cap, wherein (a) the lid body is its uppermost layer It is composed of a laminate including an easy peel layer and a gas barrier film layer so that it becomes an easy peel layer, and (b) the upper opening portion and the peripheral portion of the lid body are covered with a gas barrier film, The peripheral edge portion and the film are coupled to each other. (C) The cap portion has a shape that can be fitted to the opening, and the lower surface peripheral edge portion is interposed between the peripheral edge portion of the upper opening portion and the gas barrier film. Bound Ri Do because that, the pull cap, the gist of the thermoplastic resin lid of the beverage container is made of a material softer than the lid body.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 is an exploded perspective view when a lid according to an embodiment of the present invention is attached to an upper opening of a beverage container.
[0013]
As shown in the figure, a lid body 10 provided with an opening 11 serving as a drinking mouth inside an upper opening 41 of a cylindrical container 40, a cap portion 21 and a pull tab portion 22 connected to the cap portion 21. The lid 1 of the present invention integrated with the pull cap 20 is fitted to form a beverage container.
[0014]
The lid body 10 is cut along the line AA in FIG. 1 and is a cross-sectional view seen in the direction of the arrow, as shown in FIG. As shown in FIG. 3, which is formed on the flange 12 and is a partially enlarged view of FIG. 2, the upper portion of the opening 11 and the peripheral portion 14 thereof are covered with a gas barrier film 15. The shape of the opening 11 is not limited to the sector shown in FIG.
[0015]
The pull cap 20 is composed of a cap portion 21 and a pull tab portion 22. After opening the container, the cap portion 21 is fitted in the opening 11 by turning the pull cap 20 upside down as shown in FIG. The shape can be matched. Accordingly, the shape is arbitrarily changed depending on the shape of the opening 11, and the illustrated one is only an example.
[0016]
Further, in this embodiment, the pull tab portion 22 is inclined upward and connected to the cap portion 21 so as to be easily grasped when drinking a beverage, but may be parallel to the upper surface 13 of the lid body 10. Further, it may be joined to the easy peel layer which is the uppermost layer of the lid body 10, and conversely, the upward inclination angle may be made larger than that shown in the figure.
[0017]
That is, if it does not protrude from the upper surface of the flange 12, the pull tab portion 22 is caught by something in the distribution process, and there is no possibility that the contents will flow out due to incomplete sealing. Further, there is no inconvenience when a plurality of containers are accommodated in a cardboard box or the like or when they are displayed for over-the-counter sales.
[0018]
The lid body 10 and the pull cap 20 are combined and integrated at the peripheral edge portion 14 and the lower surface peripheral edge portion 23 of the pull cap 20 via a gas barrier film 15 covering the upper portion of the opening 11 of the lid main body 10 and the peripheral edge portion 14 thereof. ing. The bonding is performed by heat welding or an adhesive, but bonding by heat welding is preferable.
[0019]
The lid 1 is made of a thermoplastic resin. Examples of the thermoplastic resin include polyolefin, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyamide (PA), polystyrene (PS), and polyvinyl chloride (PVC). , Ethylene-vinyl acetate copolymer resin (EVA), acrylonitrile-styrene copolymer resin (AS), acrylonitrile-butadiene-styrene copolymer resin (ABS), methacrylic resin (PMA), polycarbonate (PC), ionomer, cyclic olefin- An α-olefin copolymer resin or the like can be used, and among these, polyolefin is particularly preferable.
[0020]
Polyolefins include polyethylene (low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, etc.) (PE), polypropylene (homopolypropylene, ethylene-propylene random copolymer, ethylene-propylene block copolymer, etc.) ) (PP), polybutene-1, polyhexene-1, polymethylpentene-1, and the like. These are not limited to one type, and two or more types can be used.
[0021]
Among the above polyolefins, PE, PP or a mixture thereof is particularly desirable.
[0022]
The lid body 10 is made of a laminate including the above thermoplastic resin as a base layer and including an easy peel (EP) layer and a gas barrier film (GBF) layer, and the uppermost layer of the laminate is made of EP. That is, the laminate basically has a configuration of EP (top layer) / substrate (intermediate layer) / GBF (inner layer) or EP / GBF / substrate.
[0023]
Therefore, it goes without saying that several modifications can be adopted as long as this basic configuration is adopted. For example, an adhesive layer and other member layers may be provided between these layers, and the base layer and other member layers may be multilayered. Further, as other members, it is possible to use a thermoplastic resin different from the base layer or a material other than the thermoplastic resin. As a specific example of the other member, a so-called scrap layer is formed by using resin waste generated when the lid body is molded.
[0024]
Examples of the easy peel layer that is the uppermost layer of the lid body 10 include, for example, Sun Seal manufactured by Sanei Chemical Co., Ltd., Magic Top manufactured by Idemitsu Petrochemical Co., Ltd., VMX manufactured by Mitsubishi Chemical Co., Ltd., etc. (Or trademark) film can be used. The thickness of the easy peel layer is about 100 μm or less.
[0025]
Further, the gas barrier film constituting a part of the lid body 10 needs to be a material having a property of blocking gas (particularly oxygen). Examples of the material include ethylene-vinyl alcohol copolymer (EVOH) and polyvinylidene chloride, and EVOH is particularly desirable. The thickness of the gas barrier film layer may be about 100 μm or less.
[0026]
The upper part of the opening 11 is covered with a gas barrier film 15, but the film 15 may be the same as the gas barrier film used in the lid body 10, which may be used alone or other materials. For example, you may use the laminated body which consists of two or more layers with the said thermoplastic resin.
[0027]
In particular, the gas barrier film 15 is a laminate, and the layer in contact with the upper surface 13 of the lid body 10 of the laminate is a layer made of a thermoplastic resin of the same quality as the lid body 10, and the lower peripheral edge of the pull cap 20 of the laminate If the layer in contact with the cover 23 is a layer made of the same thermoplastic resin as the pull cap 20, it can be easily fused to those surfaces when the lid 1 of the present invention is manufactured, which is advantageous. It is. Specific examples thereof include a film made of a laminate of PP / EVOH / PP. Moreover, it is free to provide an adhesive layer between these layers.
[0028]
The pull cap 20 is made of a thermoplastic resin, and is selected from the above thermoplastic resins. The thermoplastic resin may be the same as or different from the base layer of the lid body 10, but in particular, the lid body When a soft material is used rather than a material having a base layer of 10, the pull cap 20 is soft and easily deformed, and the cap portion 21 can be easily inserted into and fitted into the opening 11 and thereby sealed. In addition, there are advantages such as good touch when touched.
[0029]
As such a soft thermoplastic resin, atactic polyolefin is preferable, and atactic polypropylene is particularly preferable.
[0030]
By configuring as described above, each unit functions as follows. That is, in a state where the container 40 is filled with a beverage and the lid 1 is applied, the lid body 1 in the lid 1 is covered by the lid main body 10 constituting the lid 1 and the gas barrier film 15 covering the opening 11. The gas barrier property is sufficiently maintained, and in combination with the gas barrier property of the container 40 (including the bottom member, etc.) itself, the liquid is prevented while preventing the deterioration of food and the influence of external odors. Has the function of preserving food.
[0031]
The container with the contents reaches the final consumer through the distribution process, but the final consumer can easily open the container by pulling up the pull tab portion 22 provided in the pull cap 20 when eating. Can be done. That is, the uppermost layer of the lid body 10 is composed of an easy peel layer as described above, and therefore the pull cap 20 is easily peeled off with the gas barrier film 15. As a result, the opening 11 is completely released, and the contents can be drunk and poured out.
[0032]
Also, when stopping drinking or pouring on the way, if the cap portion 21 is inserted into the opening 11 upside down from the state in which the pull cap 20 was initially attached, the opening 11 is closed again. In this state, liquid food can be temporarily stored.
[0033]
【The invention's effect】
The present invention adopting the above configuration has the following excellent effects.
(1) It has the strength to withstand the handling of goods during product transportation and has an excellent gas barrier property. Moreover, since the gas barrier film is an inner layer, the film can be made thin and the peripheral edge of the opening. Since it is bonded to the gas barrier film alone, the film can be broken and peeled with a small force required for opening the container.
(2) Since the uppermost surface of the lid body is made of an easy peel layer, the container can be easily opened.
(3) Even when drinking is interrupted halfway, the opening can be closed with the removed pull cap, and the remaining beverage can be stored and the container can be easily carried.
{Circle around (4)} When the beverage is finished and the container is discarded, the removed pull cap can be integrated with the container and disposed by inserting it into the opening.
{Circle around (5)} It has a high-grade appearance, and it is easy to sterilize the container after filling the beverage.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a lid 1 of a beverage container according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a partially enlarged view of FIG. 2;
FIG. 4 is a cross-sectional view showing a state in which a pull cap is inserted and fitted into an opening.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cover body 10 Cover body 11 Opening 12 Flange 13 Cover body upper surface 14 Opening peripheral part 15 Gas barrier film 20 Pull cap 21 Cap part 22 Pull tab part 23 Lower surface peripheral part 40 Container 41 Upper opening part 42 Upper end side

Claims (4)

A lid body formed in a shape that covers the upper end opening of a cylindrical container and having an opening serving as a drinking mouth inside, a cap portion that is attached so as to seal the opening, and a pull tab that is connected to the cap portion In the lid made of a thermoplastic resin of a beverage container comprising a pull cap having a portion,
The lid body is composed of a laminate including an easy peel layer and a gas barrier film layer so that the uppermost layer is an easy peel layer,
The opening upper part of the lid body and the peripheral part thereof are covered with a gas barrier film, and the peripheral part and the film are combined,
The cap portion is made of a shape capable of fitting with the opening, Ri its lower periphery Do since linked via the peripheral part and the gas barrier film of the open top, the pull cap, A thermoplastic resin lid for a beverage container made of a softer material than the lid body.   The lid according to claim 1, wherein the soft material is atactic polyolefin.   The lid according to claim 1, wherein the thermoplastic resin is a polyolefin. The lid according to claim 1, 2 or 3 , wherein the gas barrier film is a film made of ethylene-vinyl alcohol.

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