JP2006021805A - Can for fizzy beverage having excellent foaming property - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a can for beer capable of demonstrating excellent foaming properties. <P>SOLUTION: The can for storing a fizzy beverage consists of a can barrel (1), a can bottom (2) and an easily-openable can lid (3). The easily openable can lid (3) comprises a preceding opening part (4) which is opened before a spout is opened, and a bulkhead (7) to separate a head space filled with gas of higher pressure than the external pressure when the preceding opening part (4) is opened into an evacuation space (5) and a pressure-keeping space (6) which is a space not communicated with the outside. The bulkhead (7) has a conduit pipe (9) to communicate the pressure-keeping space (6) with the fizzy beverage (8). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    The present invention relates to an effervescent beverage can that stores effervescent beverages such as beer and happoshu as contents, and particularly to an effervescent beverage can that exhibits excellent foaming properties when opened. .

    Conventionally, it is said that a creamy foam covers the liquid surface when drinking beer. When beer is poured from a container into a glass or the like, bubbles are generated by the liquid flow, so that the bubbles can cover the liquid surface relatively easily.

  On the other hand, recently, metal can bodies (hereinafter simply referred to as can bodies) occupy as beer containers. The can body is composed of a cylindrical can body, a can bottom, and a can lid, and the can body and the can bottom are often integrated. As the can lid, an easily open can lid, that is, a lid that can be easily opened by the hand without using a special instrument is used.

  Therefore, there are many examples of drinking beer directly from the can without using glass or the like. At this time, in the case of an ordinary can, unlike the case where it is poured into a glass, no bubbles are generated, and thus the state in which the creamy bubbles cover the liquid surface cannot be obtained.

  Several methods have been disclosed as means for generating foam in canned beer. Especially, the example of patent documents 1-3 is mentioned as a mechanism which generates a bubble effectively. These relate to a technique for generating bubbles by jetting gas into a beer from an internal hollow insert provided inside a can.

The prior document information is described below. Note that Patent Documents 4 and 5 are described in the section of the best mode for carrying out the invention for convenience of explanation.
JP-A-6-227513 Japanese Patent Laid-Open No. 6-211244 JP-A-8-310530 Japanese Patent Publication No. 4-55941 JP 2002-160732 A

  However, in Patent Documents 1 to 3 (hereinafter referred to as conventional technology), since the hollow insert is provided inside the can, the internal volume of the can is substantially reduced by the volume. Therefore, when this technology is implemented with a conventional can, it is necessary to reduce the beer storage capacity or to increase the size of the can in order to make the beer storage capacity equivalent to the conventional one. In the former case, an appropriate storage capacity cannot be secured, and in the latter case, there is a disadvantage that the cost of the can increases.

  This invention makes it a subject to provide the can body for sparkling drinks which exhibits the outstanding foaming property, without using the internal hollow insert with a problem mentioned above.

    As a result of intensive studies on means for solving the above-mentioned problems, the present inventors have come to the conclusion that the method of providing the head space itself with the function of an internal hollow insert used in the prior art is effective. It was. The head space is the portion of the can that is not filled with beer when the can is placed with the lid up, and the head space is filled with a higher-pressure gas (usually carbon dioxide) than the outside. Yes.

  In the prior art, the gas in the inner hollow insert was jetted into the beer liquid to generate bubbles, whereas in the present invention, the gas in the head space was jetted into the beer liquid.

  The concrete structure of this invention is making the can for drinkable beverages into the following structures. That is, a can body for storing an effervescent beverage consisting of a can body, a can bottom, and an easily openable can lid, wherein the easily openable can lid has a preceding opening that opens prior to the opening of the drinking mouth; When the preceding opening is opened, the head space filled with a gas higher in pressure than the outside is separated into a decompression space that is a space communicating with the outside and a pressure holding space that is a space not communicating with the outside. A partition for a sparkling beverage having excellent foaming properties, comprising a partition, the partition having a conduit for communicating the pressure-holding space and the content of the sparkling beverage.

  According to the present invention, since it is not necessary to provide an internal hollow insert inside the can, it is possible to prevent a substantial decrease in the internal volume of the can, and an excellent foaming function while being an inexpensive can body having a simple structure. Sex can be expressed.

  An example of the structure of a sparkling beverage can according to an embodiment of the present invention is shown in FIG. In the following embodiments, the case where the sparkling beverage is beer will be described.

  In the present embodiment, in a can body for storing beer consisting of a can body 1, a can bottom 2, and an easily openable can lid 3, a prior opening that opens in the easily openable can lid 3 prior to the opening of the drinking mouth 4 is provided. Further, a head space filled with a gas having a pressure higher than that of the outside, a decompression space 5 that is a space that communicates with the outside when the preceding opening 4 is opened, and a pressure-holding space 6 that is a space that does not communicate with the outside. A partition wall 7 is provided. Further, the partition wall 7 is provided with a conduit 9 that communicates the pressure-holding space 6 and the liquid of the beer 8 as the contents.

  The process leading to foaming is as follows. That is, when the preceding opening 4 is opened prior to the opening of the drinking mouth, the decompression space 5 is decompressed to the same pressure as the outside. Then, since the pressure holding space 6 is filled with the high pressure gas, the high pressure gas in the pressure holding space 6 passes through the conduit 9 due to the pressure difference between the pressure reducing space 5 and the pressure holding space 6. It spouts into the beer 8 liquid. At that time, the gas becomes foam in the beer 8 liquid and expresses excellent foaming properties.

  There is no limitation on the material of the can body, can bottom, and easy-to-open can lid, and steel, aluminum, and the like used in ordinary metal cans can be used.

  The easy-to-open can lid 3 has a partial open end that opens a part of the lid to form a mouth opening and a full open end that opens almost the entire surface of the lid to form a mouth opening. is there. When the full open end is used, there is an advantage that the state of foaming can be visually confirmed. Therefore, it is desirable that the easy-open can lid 3 used in the present invention is a full open end.

  An interval is provided between the partition wall 7 and the can body 1. From the point of view of foaming, it is advantageous that this interval is not or small, but when using a partial open end, this interval is used as a passage through which the reservoir flows toward the mouth opening when drinking a reservoir such as beer. is required. On the other hand, in the full open end, this interval is not necessarily required, but if this interval is not present when removing the entire lid, the operation for removing the partition wall 7 together with the lid is hindered.

  The full open end is preferably a double safety structure that protects the mouthpiece. Here, the double safety structure is a structure that prevents protrusion of the edge after opening, as in Patent Document 4, for example.

  The preceding opening must be opened prior to the opening of the drinking mouth. The means for opening is not particularly limited because it does not affect the effect of the present invention. For example, a method of opening with a pressing force as in Patent Document 5 or a structure using a tab widely used in a drinking mouth opening can be used.

  The material of the partition wall 7 and the conduit 9 is not particularly limited because it does not affect the effects of the present invention, and can be appropriately selected from the viewpoints of cost, flavor retention of contents, etc., but a resin that is easily molded is desirable. The partition wall 7 and the conduit 9 may be combined individually or may be manufactured integrally. The method of connecting the partition wall 7 to the easily openable can lid 3 is not limited to this, and a method using an adhesive or the like, a method using a heat fusion method, or the like can be employed. The diameter of the conduit 9 is preferably 0.1 mm to 4 mm at the tip portion immersed in the beer liquid from the viewpoint of efficient foam generation. The diameter of the conduit need not be uniform over its entire length. The length of the conduit 9 needs to be a length necessary for the tip to be submerged in the beer liquid, and it is desirable that the conduit 9 be submerged at least 5 mm on the beer liquid surface in order to generate bubbles efficiently. The number of the conduits 9 is not particularly limited.

  The decompression space 5 and the holding space 6 are preferably 10% to 60% of the decompression space and 40% to 90% of the holding space, respectively, with respect to the volume of the head space.

  FIG. 2 is a schematic perspective view showing the appearance of a can body for beer produced as an example of the present invention.

  For the easy-to-open can lid 3, a full open end made of steel for a nominal diameter of 211 (can diameter of about 66 mm) was used.

  The preceding opening 4 that is opened prior to the opening of the drinking mouth has a structure in which the preceding opening score 12 is opened by pulling up the preceding opening tab 13.

  On the lid, the partition wall 7 and the conduit 9 having the structure shown in FIG. 1 were installed. In FIG. 1, the partition wall 7 and the trunk tube 9 were integrally manufactured by injection molding using PET resin as a material. The part where the partition wall 7 is connected to the easily openable can lid 3 is 10 mm in diameter, the diameter of the part where the partition wall 7 is immersed in the beer liquid is 60 mm, and the height of the partition wall 7 as a whole is 20 mm. The diameter of the conduit was 0.5 mm, and when the beer was filled with beer, the lower end thereof was 6 mm long in the beer liquid. The partition wall 7 was connected to the easily openable can lid 3 by heat fusion. The volumes of the decompression space 5 and the holding space 6 were 20% for the decompression space 5 and 80% for the holding space 6 with respect to the volume of the head space. A product in which the partition wall 7 and the conduit 9 were integrally formed by injection molding was used.

  As the can body 1, a steel two-piece can having a nominal diameter of 211, in which the side wall and the bottom of the can are integrally formed, was used.

  The can body is opened by pulling up the preceding opening tab 13 to tear the preceding opening score 12. In this state, the drinking mouth opening tab 11 is pulled up to open the drinking mouth opening score 12, and the drinking mouth opening tab 11 is further lifted to open almost the entire surface of the lid. At the same time, the partition wall 7 and the conduit 9 are also removed.

The can was filled with beer so that the internal pressure of the head space was 1 kgf / cm ² in terms of gauge pressure at 5 ° C. The can body 1 and the can lid 3 were attached by winding.

  When the can body filled with beer prepared in this way was opened at the leading opening 4 at 5 ° C. and then opened at the drinking mouth, moderate bubbles were generated on the entire surface of the beer liquid in the can. The effect of the present invention was confirmed.

  INDUSTRIAL APPLICATION This invention can be utilized as a can body for sparkling beverages that can exhibit excellent foaming properties.

It is a cross-sectional schematic diagram which shows the structural example of the can for sparkling beverages concerning embodiment of this invention. It is a schematic perspective view which shows the external appearance of the can body for beers produced as an Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Can body 2 Can bottom 3 Easy-open can lid 4 Leading opening 5 Depressurization space 6 Holding space 7 Septum 8 Beer (sparkling beverage)
9 Conduit 10 Spout Opening Score 11 Spout Opening Tab 12 Leading Opening Score 13 Leading Opening Tab 14, 15 Rivet

Claims (1)

  A can body for storing an effervescent beverage comprising a can body, a can bottom, and an easily openable can lid, the easily openable can lid comprising a preceding opening that opens prior to the opening of a drinking mouth, and the preceding When the opening is opened, a partition that separates the head space filled with a gas higher in pressure than the outside into a decompression space that is a space communicating with the outside and a holding space that is a space not communicating with the outside. A can body for sparkling beverages having excellent foaming properties, characterized in that the partition wall comprises a conduit for communicating the pressure-holding space and the content of the sparkling beverage liquid.

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