JP4880989B2 - Pouch container with spout - Google Patents

Description

  The present invention relates to a pouch container with a spout filled with a liquid or fluid such as a soft drink or a food or a liquid.

  As a container for storing liquid beverages or foods having fluidity, there are those having screw caps for opening and closing the mouth, and liquid beverages sold in the state of being stored in such containers with screw caps In addition, some foods having fluidity must be sterilized by retort after filling in the container.

  By the way, the retort sterilization treatment must be performed in a state in which the inside of the container is completely sealed, but it may be difficult to ensure sufficient sealing performance by simply closing the mouth of the container with a screw cap. In such a container with a screw cap, the container is prepared by heat-sealing the inner seal having a knob for peeling at the opening end of the mouth so that the container can be peeled off after use after filling the contents. A method of sealing the inside is generally employed.

  Recently, as shown in FIG. 13, the inner surface obtained by laminating a synthetic resin film or laminating a synthetic resin film with aluminum foil or the like is used as a container for containing foods such as liquid beverages as described above. A bag-like container main body 50 is formed by heat-sealing the flexible sheets of each other, and a spout 60 having a mouth portion serving as a spout or a mouthpiece is attached to the container main body 50, and the mouth portion of the spout 60 A pouch container with a spout that opens and closes with a screw cap 70 has been used.

  Even when such a pouch container with a spout is used, for the filling (content) that must be retort sterilized, the spout 60 is filled after filling the contents in order to ensure the sealing performance of the container. In the case of adopting a method of closing the mouth portion of the mouth portion 61 with an inner seal, for example, as shown in FIGS. The screw cap 70 is attached in a heat-sealed state. The product purchaser then removes the inner seal 80 from the mouth 61 by gripping the corner 81 protruding outward from the mouth 61 of the inner seal 80 with the screw cap 70 removed. 61 can be opened.

JP 2001-48200 A

  However, when the rectangular inner seal 80 as described above is heat-sealed to the mouth portion 61, when the screw cap 70 is attached, the corner portion 81 of the inner seal 80 serving as the knob portion is folded in a complicated manner, and the mouth portion 61. In the state where it is folded to the outer peripheral surface side, it is sandwiched between the mouth portion 61 and the screw cap 70.

  Usually, since there is almost no gap between the mouth part 61 of the spout 60 and the screw cap 70, as described above, the corner part 81 of the inner seal 80 is folded in a complicated manner and the mouth part 61 and the screw When sandwiched between the cap 70, as shown in FIG. 15, the corner 81 of the inner seal 80 serving as a peeling knob is pressed against the outer peripheral surface of the mouth 61 by the inner peripheral surface of the screw cap 70. The corner 81 of the inner seal 80 is heat-sealed to the outer peripheral surface of the mouth 61 due to heat (for example, 115 to 130 ° C.) when the retort sterilization process is performed, and the purchaser of the product moves the inner seal 80 When peeling, there is a problem that the corner 81 cannot be picked as a knob.

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

In order to solve the above-mentioned problems, the invention according to claim 1 is directed to the container body so that a container body formed in a bag shape by a flexible sheet and a cylindrical mouth portion serving as a spout or a mouthpiece protrude. An inner seal having a spout attached to the mouth, and a peeling knob projecting outward from the mouth portion, which is heat-sealed to the opening end of the mouth portion of the spout so as to be peelable. And a screw cap that is detachably attached to the mouth portion, and in a state where the screw cap is attached to the mouth portion of the spout, the knob portion of the inner seal is an outer periphery of the mouth portion of the spout. Folded to the front end side of the male screw portion of the surface, and sandwiched between the outer peripheral surface of the mouth portion and the inner peripheral surface of the screw cap in the spout In the spouted pouch container which is in so that,
A concave portion or a convex portion is formed on the outer peripheral surface of the mouth portion of the spout so that a gap is formed between the tip portion of the knob portion of the inner seal and the outer peripheral surface of the mouth portion of the spout. A pouch container with a spout is provided.

  Further, in the invention according to claim 2, in the pouch container with a spout according to the invention according to claim 1, the recess is partially formed at a position corresponding to the tip of the knob portion of the inner seal. is there.

  According to a third aspect of the present invention, in the pouch container with a spout according to the first aspect of the present invention, a vertical groove is formed as the concave portion at a position corresponding to the knob portion of the inner seal.

  According to a fourth aspect of the present invention, in the pouch container with a spout according to the first aspect of the present invention, a large number of vertical grooves are formed as the concave portions in the circumferential direction of the mouth portion of the spout.

  As described above, in the pouch container with a spout according to the first aspect of the present invention, a concave portion or a convex portion in which a gap is formed between the outer peripheral surface of the mouth portion of the spout and the tip portion of the knob portion of the inner seal. Therefore, with the screw cap attached to the mouth portion, the tip of the knob portion of the inner seal that is folded to the outer peripheral surface side of the mouth portion is less likely to contact the outer peripheral surface of the spout mouth portion. Therefore, even when retort sterilization is performed after filling the contents, the tip of the knob portion of the inner seal is hardly fused to the outer peripheral surface of the mouth due to the heat, and the inner seal is peeled off from the mouth. It is possible to reliably pick the knob.

  In particular, in the pouch container with a spout of the invention according to claim 2 and the pouch container with a spout of the invention according to claim 3, a recess or a vertical groove as a recess is partially formed on the outer peripheral surface of the mouth part of the spout. Therefore, the strength of the spout can be sufficiently secured without extremely increasing the thickness of the mouth of the spout.

  In addition, in the pouch container with a spout of the invention according to claim 4, as the concave portion, since a number of vertical grooves were formed in the circumferential direction of the mouth portion of the spout, even when the retort sterilization treatment was performed after filling the contents, At the tip of the inner seal knob portion, there is a portion that is not fused to the outer peripheral surface of the mouth portion, from which the inner seal knob portion can be peeled off. Therefore, when the inner seal is heat-sealed at the opening end of the mouth portion, it is not necessary to align the knob portion of the inner seal with the outer peripheral surface of the mouth portion.

  Hereinafter, embodiments will be described with reference to the drawings. As shown in FIG. 1, this pouched container 1 with a spout is made of a polyester film, a polyamide film or the like in which a gas barrier sheet such as aluminum foil is laminated on the outer surface of a heat-adhesive synthetic resin film such as polyethylene or polypropylene. From a container body 10 formed into a bag shape by a laminated flexible sheet, a spout 20 formed of a heat-adhesive resin attached to the container body 10, and a screw cap 30 that opens and closes the mouth 22 of the spout 20. When the container body 10 is filled with the contents, it has the same shape as the pouch container with a spout shown in FIG. In addition, a flexible sheet | seat can also form simultaneously base materials layers, such as a heat bondable resin layer and polyamide, by extrusion molding.

  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 that are folded inward from both sides of both exterior sheets 11 to form left and right gusset sections. The outer peripheral edge of the inner surface of the outer sheet 12 is heat-sealed to the inner surface of the outer sheet 11, and the upper edge and the lower edge of the inner surface of the outer sheet 11 are heat-sealed to form a bag shape.

  The spout 20 is made of polyethylene, polypropylene, or the like, and has a fixing portion 21 that is fused to the bag-like container body 10 and a cylindrical shape that serves as a spout or spout continuously provided above the fixing portion 21. It comprises a mouth part 22 and a cylindrical or rod-like lead-out part 23 that is connected to the lower part of the adhering part 21 and facilitates the suction of the contents filled in the container main body 10. In a state where 23 is inserted into the container body 10, the side surface of the fixing portion 21 is heat sealed to the upper edge of the container body 10. In this type of pouch container, a spout having an outer diameter of the mouth of about 6 mm to 20 mm is used. The spout 20 has an outer diameter of the mouth 22 of 11 mm and a wall thickness of 1 mm. Is set.

  As shown in FIGS. 2A to 2C, the spout 20 is heat sealed with a rectangular inner seal 40 larger than the outer diameter of the mouth portion 22 at the opening end thereof. The outer peripheral surface of the mouth portion 22 of the spout 20 has a diameter of 5 mm and a depth of 0.5 mm so as to correspond to each corner portion 41 serving as a knob portion of the inner seal 40. A circular recess 22a is formed. The inner seal 40 is formed by laminating a heat-adhesive resin having easy peelability to the mouth portion 22 on the lower surface of a polyester film or the like on which aluminum foil or the like is laminated, and usually has a thickness of about 30 to 200 μm. have.

  In the pouch container 1 with a spout configured as described above, after filling the contents from the mouth part 22 of the spout 20, the inner seal 40 is heat-sealed at the opening end of the mouth part 22, so that the inside of the container body 10 is sealed. Seal. Then, after the periphery of the inner seal 40 is bent downward along the outer peripheral surface of the mouth portion 22, the retort sterilization treatment is performed with the screw cap 30 attached to the mouth portion 22 of the spout 20. In a state where the screw cap 30 is attached to the mouth portion 22 of the spout 20, as shown in FIG. 3, the tip and the mouth portion of the corner portion 41 of the inner seal 40 folded into the outer peripheral surface side of the mouth portion 22 while being folded in a complicated manner. A gap is formed between the outer peripheral surface 22 (the surface of the recess 22a) and the tip of the corner 41 of the inner seal 40 is less likely to contact the outer peripheral surface (the surface of the recess 22a) of the mouth portion 22 of the spout 20. When the tip of the corner 41 of the inner seal 40 is hardly fused to the outer peripheral surface of the mouth 22 due to the heat of the retort sterilization treatment, and the inner seal 40 is peeled off from the mouth 22 You can pick a corner 41 as a knob portion reliably.

  Moreover, in this pouch container 1 with a spout, as described above, since the recess 22a is partially formed on the outer peripheral surface of the mouth portion 22 of the spout 20, the thickness of the mouth portion 22 of the spout 20 is more than necessary. Even if it is not increased, the strength of the spout 20 can be sufficiently ensured.

  In addition, in the above-mentioned pouch container 1 with a spout, although the circular hollow 22a is formed in the outer peripheral surface of the mouth part 22 of the spout 20 so as to correspond to each corner | angular part 41 used as the knob | pick part of the inner seal 40, It is not limited to this, but instead of the circular depression 22a, as shown in FIGS. 4 (a) and 4 (b), at the positions corresponding to the corners 41 of the inner seal 40, vertical grooves (for example, It is also possible to form 22b (width 2mm, length 10mm, depth 0.5mm), and the same effect as in the case of forming the depression 22a can be obtained.

  Further, as shown in FIGS. 5A and 5B, a large number of narrow vertical grooves (for example, 1 mm in width, 10 mm in length, 0 depth in the circumferential direction of the mouth portion 22 of the spout 20 at a constant interval). .4 mm) 22 c is formed, there is always a portion that is not fused to the outer peripheral surface of the mouth portion 22 at the tip of the corner portion 41 of the inner seal 40. Since the portion 41 can be peeled and picked, when the inner seal 40 is heat sealed to the opening end of the mouth portion 22, the corner portion 41 of the inner seal 40 needs to be aligned with the outer peripheral surface of the mouth portion 22. The effect of disappearing is obtained. As described above, when a large number of vertical grooves are formed, it is not always necessary to form them at regular intervals, and they may be formed at irregular intervals.

  Further, as shown in FIGS. 6A and 6B, the circumferential groove is located at the height position corresponding to the tip of each corner 41 serving as the knob of the inner seal 40 on the outer peripheral surface of the mouth portion 22 of the spout 20. 22d can be formed, and it is not necessary to align the corner portion 41 of the inner seal 40 with the outer peripheral surface of the mouth portion 22 as in the case of forming a large number of vertical grooves 22c.

  Moreover, in each embodiment mentioned above, although recessed parts, such as the hollow 22a, the vertical grooves 22b and 22c, and the circumferential groove 22d, are formed in the outer peripheral surface of the mouth part 22 of the spout 20, it is not limited to this, A spout is not limited to this. As shown in FIGS. 7A to 7C, protrusions (for example, high heights) are formed on the outer peripheral surface of the upper end portion of the 20 mouth portions 22 so as to correspond to the corner portions 41 that are the knob portions of the inner seal 40. When the screw cap 30 is attached to the mouth portion 22 of the spout 20, the tip of the corner portion 41 of the inner seal 40 that is folded into the outer peripheral surface side of the mouth portion 22 of the spout 20 is formed. A gap is formed between the outer peripheral surface of the mouth portion 22 (below the projection 22e), and the tip of the corner 41 of the inner seal 40 is less likely to contact the outer peripheral surface of the mouth portion 22 (below the protrusion 22e). So retort killed The tip of the corner portion 41 of the inner seal 40 is hardly fused to the outer peripheral surface of the mouth portion 22 due to the heat of processing, and when the inner seal 40 is peeled from the mouth portion 22, the corner portion 41 serving as a knob portion is securely picked. be able to.

  Furthermore, as shown in FIGS. 8A and 8B, instead of the above-described protrusion 22e, a step portion 22f having a diameter slightly larger than the outer diameter of the mouth portion 22 is formed over the entire circumference. As in the case of forming the circumferential groove 22d, it is not necessary to align the corner portion 41 of the inner seal 40 with the outer peripheral surface of the mouth portion 22. Further, when a plurality of continuous or intermittent narrow grooves are formed on the outer peripheral surface of the mouth portion 22 in the vertical direction, it is not necessary to align the corner portions 41 of the inner seal 40 and the mouth portion of the spout 20 Even if the thickness of 22 is not increased more than necessary, the strength of the spout 20 can be sufficiently ensured.

  In the above-described embodiment, the recess 22a, the longitudinal groove 22b, and the protrusion 22e are formed so as to correspond to the four corners 41 of the inner seal 40, but the present invention is not limited to this. Of the four corners 41 of the seal 40, the recess 22a, the longitudinal groove 22b, and the protrusion 22e may be formed so as to correspond to at least one corner 41.

  Moreover, in each embodiment mentioned above, although the recessed part or protrusion, such as a dent and a groove | channel, and convex parts, such as a step, are formed in the outer peripheral surface of a spout, the embossing which forms fine unevenness in the outer peripheral surface of the mouth part 22 It is also possible to perform processing or to use a convex portion and a concave portion in combination. Moreover, it is desirable to set the height of the convex portion and the depth of the concave portion to about half of the thickness of the mouth portion. In particular, about 0.2 to 0.8 mm is desirable because it is easy to pick and peel with a finger (nail).

  Moreover, in each embodiment mentioned above, although the rectangular inner seal 40 is used, it is not limited to this, As shown to Fig.9 (a), (b), the opening part 22 of the spout 20 is used. It is also possible to use inner seals 40a and 40b in which one or a plurality of knobs 42a and 42b are connected to closed portions 41a and 41b having a diameter slightly larger than the outer diameter of each of the above-described embodiments. Similar effects can be obtained.

  Moreover, in embodiment mentioned above, although only the hollow 22a is formed in the outer peripheral surface of the cylindrical opening | mouth part 22, as shown to Fig.10 (a), (b), the formation part of the hollow 22a is shown. If the portion corresponding to the recess 22a on the inner peripheral surface of the mouth portion 22 is protruded radially inward so as not to reduce the thickness, the recess 22a is formed on the outer peripheral surface of the mouth portion 22 of the spout 20. The accompanying strength reduction can be prevented.

  In the above-described embodiment, the inner seal 40 is heat-sealed and the screw cap 30 is attached after filling the contents from the mouth portion 22 of the spout 20, but the present invention is not limited to this. After opening a part of the container (for example, the lower edge) without heat-sealing, heat-sealing the spout on the upper edge of the container body, attaching the inner seal to the mouth of the spout, and then opening the container body The content may be filled from the (lower edge).

  Moreover, in each embodiment mentioned above, although the small outer diameter of the mouth part of the spout 20 was demonstrated (about 6-20 mm), the small pouch container with a spout was demonstrated, It is not limited to this, For example, FIG. As shown in FIG. 12, the present invention is also applied to a large spout pouch container 1A having a spout 20A having a large mouth diameter (about 10 to 40 mm) attached to a container body 10A filled with liquid food. It goes without saying that you can do it. For example, when the outer diameter of the mouth part of the spout is about 18 mm and the wall thickness is about 1 mm, when the same recess as the recess 22a formed in the mouth part 22 of the spout 20 of the above-described pouch container 1 with a spout is provided, the diameter Is preferably set to 8 mm and the depth is set to about 0.5 mm. When a vertical groove similar to the vertical groove 22 b is provided, the width is set to 10 mm, the length is set to 10 mm, and the depth is set to about 0.5 mm. It is desirable to set, and when a vertical groove similar to the vertical groove 22c is provided, the width is preferably set to 1 mm, the length is set to 10 mm, and the depth is set to about 0.5 mm.

  Furthermore, the container body 10 is not limited to the side gusset bag as described above, and may be a standing pouch or a flat bag shape with the bottom portion folded.

It is a front view which shows one Embodiment of the pouch container with a spout concerning this invention. (A) is a partial side view showing the mouth part of the spout of the above-described pouch container with a spout, (b) is a plan view showing the mouth part of the above, and (c) is a cross section taken along line WW in (a). FIG. It is a partial expanded sectional view which shows the mouth part of the spout in the pouch container with a spout same as the above. (A) is a partial side view which shows the mouth part of the spout of the pouch container with a spout which is other embodiment, (b) is sectional drawing along the XX line of (a). (A) is a partial side view which shows the mouth part of the spout of the pouch container with a spout which is other embodiment, (b) is sectional drawing along the YY line of (a). (A) is a partial side view which shows the mouth part of the spout of the pouch container with a spout which is other embodiment, (b) is sectional drawing along the ZZ line of (a). (A) is the partial side view which shows the mouth part of the spout of the pouch container with a spout which is other embodiment, (b) The top view which shows the mouth part same as the above, (c) The partial expansion which shows the mouth part same as the above It is sectional drawing. (A) is a partial side view which shows the mouth part of the spout of the pouch container with a spout which is other embodiment, (b) is a top view which shows the mouth part same as the above. (A), (b) is a top view which shows the modification of an inner seal. (A) is a cross-sectional view of the mouth part showing a modified example of the spout of the above, and (b) is a longitudinal sectional view of the mouth part showing a modified example of the same. It is a front view which shows the pouch container with a spout to which the large sized spout was attached. It is a perspective view which shows the pouch container with a spout same as the above. It is a perspective view which shows the pouch container with a spout. It is explanatory drawing for demonstrating the sealing method in a pouch container with a spout same as the above. It is a partial expanded sectional view which shows the mouth part of the spout in the pouch container with a spout same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Pouch container with spout 10, 10A container main body 11 Exterior sheet 12 Gusset sheet 20, 20A Spout 21 Adhering part 22 Mouth part 22a Depression 22b, 22c Vertical groove 22d Circumferential groove 22e Protrusion 22f Step part 23 Derived part 30 Screw cap 40 40a, 40b Inner seal 41 Corner portion 41a, 41b Closure portion 42a, 42b Knob portion

Claims (4)

A container body formed into a bag shape by a flexible sheet;
A spout attached to the container body so that a cylindrical mouth portion serving as a spout or a mouthpiece protrudes;
An inner seal having a peeling knob projecting outward from the mouth, which closes the opening end by being heat-sealed to the opening end of the mouth of the spout so as to be peelable;
A screw cap detachably attached to the mouth ,
In a state where the screw cap is attached to the mouth portion of the spout, the knob portion of the inner seal is folded to the front end side with respect to the male thread portion of the outer peripheral surface of the mouth portion of the spout, and the mouth of the spout In a pouch container with a spout that is sandwiched between the outer peripheral surface of the part and the inner peripheral surface of the screw cap ,
A concave portion or a convex portion is formed on the outer peripheral surface of the mouth portion of the spout so that a gap is formed between the tip portion of the knob portion of the inner seal and the outer peripheral surface of the mouth portion of the spout. A pouch container with a spout characterized by being.   The pouch container with a spout according to claim 1, wherein the recess is a recess partially formed at a position corresponding to a tip of the knob portion of the inner seal.   The pouch container with a spout according to claim 1, wherein the recess is a longitudinal groove formed at a position corresponding to the knob portion of the inner seal.   2. The pouch container with a spout according to claim 1, wherein the recess is a plurality of vertical grooves formed in a circumferential direction of the mouth portion of the spout.

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