JPH0558621U - Liquid paper container - Google Patents

Abstract

(57) [Abstract] [Purpose] In a Gobel top type paper container, the repulsive force when the upper flap tries to return to its original position is not concentrated on the bottom crease line, and slow leak does not occur. [Structure] The release agent 3 was applied so as to hang on the lower folding line 4 of the upper seal piece 2.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a paper container that stores a beverage such as juice or alcohol.

[0002]

[Prior Art]

 Conventionally, in this type of paper container, there is a so-called gable top type in which the upper part of the container body is shaped like a gable roof. This paper container has a gable roof shape in which the other upper flap is folded between a pair of opposing upper flaps in the upper opening of the container body, and the upper seal is formed by continuously folding the upper flap. The piece was heat sealed and closed.

In consideration of the opening operability of this paper container, as shown in FIG. 4, the upper seal piece 2 continuous to the upper part of one upper flap 1 to be folded is peeled on the inner peripheral surface of the upper opening of the paper container. The release agent 3 was applied to the surfaces corresponding to the upper seal pieces 2 located on both sides of the upper seal piece 2 while applying the release agent 3.

[0004]

[Problems to be solved by the device]

 However, if the top molding (folding the upper opening and heat-sealing the upper seal piece) is performed from the sleeve (cylindrical blanks) coated with the release agent in the above pattern, the release agent is applied. There was a problem of pinholes and resin breakage in the uncovered areas. This is because when the clamping force A (caused by the sealer) that sandwiches the upper sealing piece 2 at the time of heat sealing disappears, the upper flap 1 tries to return to its original state and the repulsive force B is below the upper sealing piece 2. The bottom creases 4 were concentrated on the edge creases 4 and the space between the bottom creases 4 that had been joined by heat sealing was opened (see Fig. 6), and holes were cut or cut in the inner layer film 5 at the bottom creases 4 This was done (see FIG. 7). These pinholes and resin breaks are not enough to leak the contents, but slow leak (pulling of air into the container) occurs from this part and the container body bulges, impairing the appearance of the product. Was becoming.

In view of the above situation, therefore, the present invention is to prevent the repulsive force when the upper flap tries to return to the original state in the Gobel top type paper container from concentrating on the lower fold line. The objective is to prevent slow leaks from occurring.

[0006]

[Means for Solving the Problems]

 The present invention has been made in consideration of the above-mentioned problems, and a side seal surface and an upper end are formed on the inner peripheral surface of the upper opening of a Goebel top type paper container in which the upper opening of the container body is cut and folded into a gable roof shape. Another object of the present invention is to provide a liquid paper container characterized in that a release agent is applied so as to hang on the lower end crease line of the upper seal piece except for the edge side, and the above-mentioned problems are solved.

[0007]

[Action]

 In the present invention, since the release agent is applied so as to hang on the bottom crease line of the upper seal piece, the gripping force that sandwiched the upper seal piece disappears and the upper flap tries to return to its original position. As shown in FIG. 3, the space between the lower fold creases 4 of the upper seal piece 2 becomes relatively wide in the vertical direction, so that the repulsive force is not concentrated on the lower fold creases 4.

[0008]

【Example】

 Next, the present invention will be described in detail based on the embodiment shown in FIG. That is, according to the present invention, as shown in the state of the blanks in FIG. 1, in the inner peripheral surface of the upper opening of the container main body, except the side seal surface 6 and the upper edge 7 side, the lower end fold line 4 of the upper seal piece 2 is formed. The stripping agent 3 is applied in a strip shape so as to be applied. With this configuration, the clamping force at the time of molding the top is released and the repulsive force that causes the upper seal piece 2 to return to its original position opens the space between the parts to which the release agent is applied, so that the repulsive force does not concentrate on the part of the bottom fold line 4. Become. In addition, the upper end edge 7 side is reliably heat-sealed so that the opposing inner surfaces are welded and the hermeticity as a container is secured.

A container is molded from a sleeve coated with a release agent in the conventional pattern and a sleeve coated with the release agent in the above pattern using Shikoku Kakoki UP-SC60, and as shown in FIG. The width d of the body portion having a height of 10 cm from the bottom was measured to examine the change over time in the body swelling. The results are shown below. The used paper container is 70 square, 1000 ml manufactured by Toppan Printing Co., Ltd. (the content used water).

[0010]

[Table 1]

The paper container used in the above-mentioned test loses its aesthetic appearance when the size of the body exceeds 78 mm, but very good results were obtained with the paper container coated with the release agent in the pattern of the present invention. In other words, it was confirmed that there is no pinhole or resin breakage, and the swelling of the paper container is less likely to occur, and the aesthetic appearance of the product can be maintained for a long time.

[0012]

[Effect of the device]

 As described above, according to the present invention, in the inner peripheral surface of the upper opening of the Gobel top type paper container in which the upper opening of the container main body is folded and closed like a gable roof, except for the side seal surface and the upper edge side. Since the release agent is applied so that it hangs on the bottom crease line of the upper seal piece, it means that the part exposed to the hot air during heat sealing (the inner surface of the upper opening) or the release agent is covered, and the pinhole It is excellent in practicality, such as preventing the occurrence of resin and preventing the resin from running out because the space between the opposing bottom fold lines is opened after top molding and the repulsive force is not concentrated on these bottom fold lines. It has a great effect.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a liquid paper container according to the present invention in a state of blanks.

FIG. 2 is an explanatory diagram showing an example.

FIG. 3 is an explanatory view showing the spread between the lower end folding ruled lines of the upper seal piece in one embodiment.

FIG. 4 is an explanatory diagram showing a conventional example in a state of blanks.

FIG. 5 is an explanatory diagram showing a top molding process.

FIG. 6 is an explanatory view showing a spread between lower end folding ruled lines of an upper sealing piece in a conventional example.

FIG. 7 is an explanatory view showing resin breakage in a conventional example.

[Explanation of symbols]

 1 ... Upper flap 2 ... Upper sealing piece 3 ... Release agent 4 ... Bottom folding ruled line 5 ... Inner layer film 6 ... Side seal surface 7 ... Upper edge A ... Clamping force B ... Repulsive force

Claims (1)

[Scope of utility model registration request] 1. A lower end fold of an upper sealing piece except for a side seal surface and an upper edge side on an inner peripheral surface of an upper opening of a Gobel top type paper container in which the upper opening of the container main body is folded and closed like a gable roof. A liquid paper container characterized in that a release agent is applied so as to hang on a ruled line.