JP2001048200A - Pouch container with spout - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a knob section from being fusion bonded on the outer peripheral face of a mouth section even in the case the retort sterilization is carried out in the state that the knob section of an inner seal is folded between the mouth section of a spout and a screw cap. SOLUTION: A pouch container with a spout is provided with a bag-shaped container main body, a spout 20 so installed as to protrude a cylindrical mouth section 22 on the container main body, a rectangular inner seal 40 for closing the opening end of the mouth section 22 by being heat sealed releasably on the opening end of the mouth section and a screw cap 30 installed removably on the mouth section 22 by being screwed into a male screw 24 formed on the mouth section 22, and a clearance L, in which a thread of the male screw 24 on the side of the spout 20 wherein the screw cap 30 is screwed is formed high so that a protruded section (knob section) 41 of the inner seal 40 to be folded on the outer peripheral face side of the mouth section 22 is not pressed to the mouth section 22 by the screw cap 30, is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pouch container with a spout which is filled with a liquid or a fluid such as a liquid beverage such as a soft drink or a food.

[0002]

2. Description of the Related Art As containers for storing liquid beverages and foods having fluidity, there is a container having a screw cap for opening and closing a mouth portion. Some liquid beverages and liquid foods to be sold must be subjected to retort sterilization after filling in containers.

[0003] Incidentally, the retort sterilization treatment must be performed in a state where the inside of the container is completely sealed. However, simply closing the mouth of the container with a screw cap cannot ensure sufficient sealing performance. In such a container with a screw cap, an inner seal having a knob for peeling is heat-sealed to the open end of the mouth so that the contents can be peeled off after use after filling the container. The method of sealing is generally adopted.

Recently, as a container for storing food such as a liquid beverage as described above, as shown in FIG. 4, a flexible sheet having a heat-adhesive inner surface laminated with an aluminum foil or the like on a synthetic resin film is used. In addition to forming a bag-shaped container body 50 by heat sealing, a spout 60 having a mouth serving as a spout or a drinking mouth is attached to the container body 50, and the mouth of the spout 60 is screwed with a screw cap 70. Pouch containers with spouts that open and close have been used.

[0005] Even in the case of using such a pouch container with a spout, the filling (content) which must be subjected to the retort sterilization treatment is performed after filling the content in order to ensure the hermeticity of the container. , Spout 60
Must be closed by an inner seal. However, the mouth of the pouch container with spout
Since the caliber is relatively small, an inner seal like that used in a general container with a screw cap, that is, a knob for peeling is continuously provided in a closed portion formed in substantially the same shape as the mouth. As shown in FIGS. 5A to 5C, a screw cap is used in a state where a rectangular inner seal 80 larger than the mouth is heat-sealed to the open end of the mouth 61 without using such an inner seal. 70 is attached. Then, in a state where the purchaser of the product removes the screw cap 70, the portion 81 that protrudes outward from the mouth portion 61 of the inner seal 80 is picked, and the inner seal 80 is peeled off from the mouth portion 61, thereby removing the mouth portion 61. Can be opened.

[0006]

However, when the above-described rectangular inner seal 80 is heat-sealed to the mouth portion 61, when the screw cap 70 is attached, the projecting portion of the inner seal 80 serving as a knob is formed. 8
1 is sandwiched between the mouth portion 61 and the screw cap 70 in a state where it is folded over the outer peripheral surface side of the mouth portion 61 while being complicatedly folded.

Normally, there is almost no gap between the mouth portion 61 of the spout 60 and the screw cap 70. Therefore, as described above, the projecting portion 81 of the inner seal 80 is complicatedly folded and overlapped. 6, the projecting portion 81 of the inner seal 80, which becomes a knob for peeling, is formed by the inner peripheral surface of the screw cap 70 so that the outer peripheral portion of the mouth 61 is sandwiched between the portion 61 and the screw cap 70. Surface, and the heat (for example, 121 to 125 ° C.) when performing the retort sterilization process causes the overhang portion 81 of the inner seal 80 to be heat-sealed to the outer peripheral surface of the mouth portion 61 to purchase the product. Is the inner seal 8
There is a problem that, when the 0 is peeled off, the protruding portion 81 cannot be picked as a knob.

[0008] Therefore, an object of the present invention is to solve the problem that even when retort sterilization is performed with the knob of the inner seal folded between the mouth of the spout and the screw cap, the knob of the inner seal can be closed. It is an object of the present invention to provide a pouch container with a spout which is not fused to the outer peripheral surface of the pouch.

[0009]

Means for Solving the Problems and Their Effects To solve the above-mentioned problems, the present invention provides a container body formed in a bag shape by a flexible sheet, and a cylindrical mouth serving as a spout or drinking mouth. A spout attached to the container body so as to protrude, and the spout is peelably heat-sealed to an open end of the mouth of the spout to close the open end, and peeling outward from the mouth. A pouch container with a spout, comprising: an inner seal having a knob portion for use; and a screw cap detachably attached to the mouth by screwing into an external thread formed on the outer peripheral surface of the mouth of the spout. In the above, between the mouth of the spout and the screw cap, a knob of the inner seal folded on the outer peripheral surface side of the mouth of the spout is provided. Serial it by the inner peripheral surface of the screw cap of the formation of the gap so as not pressed against the outer peripheral surface of the mouth portion of the spout.

[0010] In the pouch container with a spout configured as described above, with the screw cap attached to the mouth, the knob of the inner seal folded into the outer peripheral surface side of the mouth has the inner peripheral surface of the screw cap. Because the spout is not pressed against the outer peripheral surface of the mouth portion, even when retort sterilization is performed after filling the contents, the heat causes the knob of the inner seal to be firmly fused to the outer peripheral surface of the mouth portion. When the inner seal is peeled from the mouth, the knob can be reliably picked.

In particular, when the gap is set to be at least three times, preferably about four to eight times the thickness of the inner seal, as in the case of the pouch container with a spout according to claim 2, Even if it is folded between the mouth and the screw cap in a complicatedly folded state, the knob is not pressed against the outer peripheral surface of the mouth, and the mouth of the knob during retort sterilization treatment Can be reliably prevented from being fused.

The gap between the mouth portion and the screw cap may be formed by increasing the thread of the male screw on the spout side into which the screw cap is screwed. As described in 4, the spout can be formed by reducing the outer diameter of the spout at the mouth portion on the tip side from the male screw.

[0013]

Embodiments will be described below with reference to the drawings. As shown in FIG. 1, a pouch container 1 with a spout is a flexible material in which a polyester film or the like in which a gas barrier sheet such as an aluminum foil is laminated on the outer surface of a synthetic resin film having thermal adhesiveness such as polyethylene or polypropylene. A container body 10 formed in a bag shape by a sheet, and the container body 10
The spout 20 is formed of a thermo-adhesive resin attached to the spout 20 and a screw cap 30 for opening and closing the mouth 22 of the spout 20. When the contents are filled in the container main body 10, FIG. It has the same shape as the spouted pouch container shown.

The container body 10 is composed of a pair of front and back exterior sheets 11 and a pair of left and right gusset sheets 12 which are folded inward from both sides of the exterior sheets 11 to form left and right gusset portions. The rim of the inner surface of the gusset sheet 12 is heat-sealed to the inner surface of the outer sheet 11, and the upper and lower edges of the inner surface of the outer sheet 11 are heat-sealed with each other to form a bag. I have.

The spout 20 is formed of polyethylene, polypropylene, or the like, and serves as a fixing portion 21 that is fused to the bag-shaped container body 10 and a spout and a drinking port connected to an upper portion of the fixing portion 21. A cylindrical mouth portion 22 and a fixing portion 21
Cylindrical or rod-shaped lead-out portion 23 connected to the lower portion of the container for facilitating the suction of the contents filled in the container body 10
And the lead-out portion 23 is provided in the container main body 10.
The side of the fixing portion 21 is inserted into the container main body 1.
0 is heat sealed to the upper edge.

The spout 20 has a male screw 24 which is screwed into a female screw formed on the inner peripheral surface of the screw cap 30 on the outer peripheral surface of the mouth 22 thereof, as shown in FIG. The height of the screw thread of the male screw 24 formed on the screw cap 30 is made higher than the height of the screw thread of the female screw 31 formed on the screw cap 30, so that the screw cap 30 is attached to the mouth 22 of the spout 20. A gap L of about 0.4 mm is formed between the outer peripheral surface of the screw 22 and the inner peripheral surface of the screw cap 30.

When the container body 10 is filled with the contents, the spout 20 has an opening 2 at the opening end of the opening 22.
The inside of the container body 10 is hermetically sealed by heat sealing the inner seal 40 having a rectangular shape larger than the outer diameter of the container 2. The inner seal 40 is provided on the lower surface of a polyester film or the like on which aluminum foil or the like is laminated.
And has a thickness of about 70 to 100 μm.

In the pouch container 1 with a spout configured as described above, after filling the contents from the mouth portion 22 of the spout 20, the inner seal 40 is heat-sealed to the open end of the mouth portion 22 to form a container body. Seal inside 10. After the periphery of the inner seal 40 is bent downward along the outer peripheral surface of the mouth 22, the mouth 22 of the spout 20 is bent.
The retort sterilization process is performed with the screw cap 30 attached.

When the screw cap 30 is attached to the spout 20, as shown in FIG.
The gap L between the outer peripheral surface of the mouth 22 and the screw cap 30 is about 4 to 6 times the thickness of the inner seal 40.
(Approximately 0.4 mm), so that the rectangular inner seal 4 is heat-sealed to the open end of the mouth 22.
Even if the projecting portion 41 outwardly extending from the mouth 22 of the 0 is folded into the outer peripheral surface side of the mouth 22 while being complicatedly folded, the projecting portion 41 is formed by the inner peripheral surface of the screw cap 30. The inner seal 4 is not strongly pressed against the outer peripheral surface and is heated by the heat during the retort sterilization.
The overhang portion 41 of 0 is not firmly fused to the outer peripheral surface of the mouth portion 22.

Therefore, in the pouch container 1 with a spout, when the inner seal 40 is peeled from the mouth portion 22,
Since the protruding portion 41 of the inner seal 40 serving as a knob can be reliably picked, the inner seal 40 can be smoothly and reliably peeled from the mouth 22 as compared with a conventional pouch container with a spout. .

FIG. 3 shows another embodiment. Since the pouch container with spout has basically the same configuration as the pouch container 1 with spout described above, the same components are denoted by the same reference numerals, and description thereof will be omitted, and different portions will be described.

In the above-described pouch container 1 with spout,
By making the height of the thread of the male screw 24 formed on the mouth 22 of the spout 20 higher than the height of the thread of the female screw 31 formed on the inner circumferential surface of the screw cap 30, the outer circumferential surface of the mouth 22 and A predetermined gap L is formed between the screw cap 30 and the inner peripheral surface thereof. In this pouch container with a spout, the mouth 2 of the spout 20a is formed.
The screw thread of the male screw 24a formed on the inner screw 2a and the screw thread of the female screw 31 formed on the inner peripheral surface of the screw cap 30 have substantially the same height. By reducing the outer diameter,
In other words, by reducing the thickness of the mouth 22a on the tip side from the male screw 24a, the spout 20a
A gap L ′ of about 0.55 mm is formed between the outer peripheral surface of the opening 22a and the inner peripheral surface of the screw cap 30.

Accordingly, in this pouch container with spout, similarly to the above-described pouch container 1 with spout, the protruding portion 41 of the inner seal 40 from the mouth portion 22a of the inner seal 40 is formed by the heat at the time of performing the retort sterilization treatment. The inner seal 40 can be easily peeled off from the opening 22a by pinching the protruding portion 41 without being firmly fused to the surface.

Further, in each of the above-described embodiments, since the appropriate gaps L and L 'are formed between the mouth portions 22 and 22a of the spouts 20 and 20a and the screw cap 30, the inner seal 40 is opened. When the screw cap 30 is attached after the heat seal at the open ends of the portions 22 and 22a, the inner seal 40 is less likely to be damaged by the screw cap 30, so that the reliability of the inner seal 40 for sealing the container is improved. There is also an effect.

In the embodiment described above, the mouth 22,
The gap between the outer peripheral surface of 22a and the inner peripheral surface of the screw cap 30 is set to 0.4 mm or 0.55 mm, but is not limited to this. However, while the projecting portion 41 of the inner seal 40 serving as the knob portion is complicatedly folded and overlapped, the mouth portions 22 and 22a and the screw cap 30 are not folded.
If it is folded between the mouth 22, 22a
The gap between the outer peripheral surface of the inner seal 40 and the inner peripheral surface of the screw cap 30 needs to be set to at least three times or more, more preferably about four to eight times the thickness of the inner seal 40.

In the above embodiment, the spout 2
By increasing the height of the thread of the male screw 24 formed in the mouth 22 of the No. 0 or reducing the outer diameter of the mouth 22a on the tip side from the male screw 24a, the predetermined gaps L and L 'are obtained.
However, conversely, it is also possible to secure a gap by increasing the height of the thread of the female screw formed on the screw cap side, or increasing the inner diameter of the upper part than the female screw of the screw cap It is. However, considering the formability of the screw cap, it is difficult to increase only the thread of the female screw or to increase the inner diameter on the upper side than the female screw, so as described above, it is appropriate to adjust on the spout side. You can say that.

In the above-described embodiment, the case where a rectangular inner seal is used has been described. However, the shape of the inner seal is not particularly limited, and the present invention relates to a general container having a screw cap. It can be applied to the case where the inner seal used for the inner seal, that is, the inner seal in which the knob for peeling is continuously connected to the closing part formed in the substantially same shape as the mouth part is used. Not even.

Further, the container body 10 is not limited to the side gusset bag as described above, but may be a standing pouch having a bottom folded or a flat bag shape.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a pouch container with a spout according to the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing a mouth portion of the spout in the pouch container with a spout according to the first embodiment.

FIG. 3 is a partially enlarged cross-sectional view showing a mouth portion of a spout in a pouch container with a spout according to another embodiment.

FIG. 4 is a perspective view showing a pouch container with a spout.

FIG. 5 is an explanatory diagram for explaining a sealing method in the pouch container with a spout according to the first embodiment.

FIG. 6 is a partially enlarged cross-sectional view showing a mouth portion of the spout in the pouch container with a spout according to the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pouch container with spout 10 Container body 20, 20a Spout 22, 22a Mouth 24, 24a Male screw 30 Screw cap 31 Female screw 40 Inner seal 41 Overhanging part (knob)

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Fumiwa Yamada, Inventor 5-3-18, Imazukita, Tsurumi-ku, Osaka-shi F-Term in Fuji Alpha Co., Ltd. 3E064 FA04 HS04

Claims (4)

[Claims] 1. A container body formed in a bag shape by a flexible sheet, a spout attached to the container body such that a cylindrical mouth serving as a spout or a drinking mouth projects, and the spout of the spout An inner seal having a peeling knob protruding outward from the mouth to close the open end by being peelably heat-sealed to the open end of the mouth, and an outer peripheral surface of the mouth of the spout. In a pouch container with a spout provided with a screw cap detachably attached to the mouth by being screwed into a male screw formed in the spout, the spout is provided between the spout and the screw cap. The knob of the inner seal folded into the outer peripheral surface side of the portion is formed on the outer peripheral surface of the mouth of the spout by the inner peripheral surface of the screw cap. Spouted pouch container clearance as not pressurized is formed. 2. The pouch container with a spout according to claim 1, wherein the gap is set to be three times or more the thickness of the inner seal. 3. The pouch container with a spout according to claim 1, wherein the gap is formed by increasing the thread of the male screw on the spout side into which the screw cap is screwed. 4. The pouch container with a spout according to claim 1, wherein the gap is formed by reducing the outer diameter of the spout at the distal end side of the mouth portion with respect to the male screw.