JP6410124B2 - Standing pouch - Google Patents

Description

  The present invention mainly belongs to the technical field of packaging bags for storing and selling liquids, and particularly relates to a standing pouch that is self-supporting in a state where the liquid is filled as a content.

  The above-mentioned standing pouch is formed by sandwiching a bottom film folded in a mountain shape at the bottom of a body film made of a flexible laminated film and heat-sealing the periphery. When the liquid is filled as the contents, the bottom film expands. Conventionally, it has been suitably used as an alternative container for shape retaining containers such as bottles and cartons, or as a refill container for refilling bottles with contents. And various things which improve the independence conventionally are considered, and the standing pouch which provided the reinforcement mechanism in the side part seal part is proposed as what is high in particular.

  For example, the standing pouch described in the cited document 1 has a reinforcing structure by bending at least a part of the side seal part to the body part side and bonding a cylindrical unsealed part. Moreover, the standing pouch described in the cited document 2 joins a columnar reinforcing member formed by resin injection molding along a portion of the side seal portion excluding the upper and lower sides.

JP 2001-270533 A JP 2007-261607 A

  The above-mentioned standing pouch is made of a flexible laminated film. Therefore, when the standing pouch is made to stand by being filled with the contents, it is bent in the vertical direction at the center in the width direction of the pouch due to the weight of the contents (usually “middle folding” ") Will occur. If this breakage occurs, the pattern printed on the surface of the pouch breaks, and there is a problem that the appearance as a product is not good when arranged at the store. However, as described above, in any document including the cited documents 1 and 2, although the point of improving the independence of the standing pouch is described, nothing is described about suppressing the folding. I can't find it.

  The present invention has been made in view of such a background, and an object of the present invention is to provide a standing pouch that suppresses the folding that occurs in a self-supporting state.

In order to achieve the above object, in the standing pouch according to the present invention, a two-fold bottom film is disposed between two wall films forming the body portion, and the two wall films are sealed. A standing pouch having an upper seal part, a side seal part in which two wall films are sealed , a bottom seal part in which the wall film and the bottom film are sealed, and a gusset part at the bottom, The upper seal portion includes a base piece and a folded piece that is connected to the base piece via a folding line and folded toward the bottom, and the folded piece is at least a central portion in the width direction of the upper seal portion. The base piece and the folded piece are not bonded to each other.

  In the standing pouch, the folded piece is preferably provided from one end to the other end in the width direction of the upper seal portion.

  In the above-described standing pouch, it is preferable that a wide seal portion is provided continuously to the side seal portion, and the wide seal portion is provided on an upper portion of the pouch.

  Since the standing pouch of the present invention is provided with the folded piece on the upper seal portion, in the self-supporting state filled with the contents, the folded piece is stretched so that the entire wall film is stretched. The shape of the V-shaped fold formed toward the inside can be easily retained, and the pouch can be prevented from being folded. Therefore, the pattern on the pouch surface can be prevented from collapsing, and the appearance at the store can be prevented from deteriorating. In addition, there is an advantage that it is easy to hold because the finger can be hooked on the folded piece.

It is a perspective view which shows an example of the standing pouch which concerns on this invention in the state which filled the contents and became independent. It is a top view which shows the standing pouch of FIG. 1 in the state before filling. It is explanatory drawing which shows the standing pouch of FIG. 2 in the cross section of a vertical direction. It is a perspective view which shows the other example of the standing pouch which concerns on this invention in the state which filled the contents and became independent. It is a top view which shows the standing pouch of FIG. 4 in the state before filling. It is a top view which shows the other example of the standing pouch which concerns on this invention in the state before filling. It is a top view which shows the other example of the standing pouch which concerns on this invention in the state before filling. It is a top view which shows the other example of the standing pouch which concerns on this invention in the state before filling. It is explanatory drawing at the time of forming a ruled line on the folding line which connects the return piece. It is explanatory drawing which shows the other example of the standing pouch which concerns on this invention in the cross section of a vertical direction.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

The standing pouch A ₁ shown in FIG. 1 is composed of a flexible laminated film, and is sold by filling, for example, liquid food as the contents. The state before filling the contents is shown in FIGS. This is shown in FIG.

The standing pouch A ₁₁ shown in FIG. 2 and FIG. 3 is manufactured by combining a bottom film 2 that is folded in two between two wall films 1 that form a body part. Moreover, the bottom part of the gusset type which folded the bottom film 2 in half is provided with a semicircular cutout 2a in the vicinity of the lower ends on both sides, and the two folded between the two wall film 1 forming the body part. The bottom film 2 is sandwiched and heat sealed with a bottom seal portion 3 having a boat bottom shape, and heat sealed with side seal portions 4 along the left and right edges to form a bag. The left and right side seal portions 4 are respectively formed with opening notches 5 at a predetermined distance from the upper side.

The standing pouch A11 shown in FIGS. 2 and 3 is sent to the filling process in a state where a plurality of standing pouches A11 are collected, and the contents are filled one by one. Specifically, the upper part is expanded and filled with the contents, and heat sealing is performed so as to close the opening to form the upper seal part 6 having a predetermined width. By going through this filling process, standing pouch A1 in addition a bottom seal portion 3 to the left and right side seal portion 4, and that has an upper portion seal portion 6.

After filling the contents in this way, in the present invention, the upper seal portion 6 is folded back toward the bottom. That is, as shown in FIG. 1, the upper seal portion 6 is composed of a base piece 7 and a folded piece 8, and the base piece 7 and the folded piece 8 are connected via a folding line α. At this time, the folded piece 8 is preferably folded so that the angle between the folded piece 8 and the base piece 7 becomes an acute angle. As a result, as shown in FIG. 1, the standing pouch A ₁ is provided with the folded piece 8 extending from one end to the other end in the width direction of the upper seal portion 6. In FIG. 2, the upper seal portion planned portion is denoted by reference numeral 61, the broken line planned portion is denoted by reference numeral α <b> 1, the base piece planned portion is denoted by reference numeral 71, and the folded piece planned portion is denoted by reference numeral 81.

In this standing pouch A ₁ , since the folded piece 8 provided on the upper seal portion 6 stretches and holds the wall film 1, the shape of the V-shaped fold formed from the upper portion of the wall film 1 toward the inside is provided. Becomes easier to retain the shape, and the pouch is prevented from being folded. And when taking out the contents, the wall surface film 1 can be broken and opened by picking the side seal portions 4 on both sides of the left and right opening notches 5 and pulling them to the opposite sides. The same applies to the following examples, but the opening means provided on the upper portion of the pouch is not limited to the opening notch 5 and any conventionally known means may be used.

A standing pouch A _{2 in} FIG. 4 is a modification of the standing pouch A ₁ described in FIG. 1, and a state before filling the contents is shown in FIG. Since FIG. 5 is similar to FIG. 2, the same reference numerals are given to the same components.

In the standing pouch A ₂₁ shown in FIG. 5, a wide seal portion 9 connected to both side seal portions 4 is provided on the upper portion of the pouch. As shown in FIG. 5, the wide seal portion 9 is formed so as to overlap the upper seal portion planned portion 61. The wide seal portion 9 includes an upper first portion 91 and a lower second portion 92, and an inner seal line of the second portion 92 is formed so as to incline from the inside to the outside of the pouch. It is preferable. Further, when the inner seal line of the second seal portion 92 is formed so as to be inclined, it is preferably formed so as to have a portion that curves toward the outside of the pouch.

  In FIG. 5, the wide seal portion 9 is formed so that the outer seal line is connected to the side seal portion 4, and the inner seal line of the first portion 91 is inclined from the outside to the inside of the pouch. The inner seal line of the second portion 92 is formed so as to incline from the inner side of the pouch toward the outer side, and the inner seal line of the second portion 92 is connected to the inner seal line of the side seal portion 4. In the vicinity of the place to be provided, the inner seal line of the second portion 92 is formed to curve toward the outside of the pouch.

  The wide seal portion 9 connected to the side seal portion 4 may be formed at the same time when the side seal portion 4 is heat sealed. By providing the wide seal portion 9 having such a shape, in addition to suppressing the middle folding of the pouch, it is also easy to suppress folding at the side of the pouch (usually referred to as “lumbar folding”).

Standing pouches A ₃₁ , A ₄₁ , and A ₅₁ in FIGS. 6, 7, and 8 are modifications of the standing pouch A ₁₁ described with reference to FIG. 2, and each is shown in a state before being filled with contents. In these drawings, only the shape of the side seal portion 4 is different from that in FIG. 2, and the same components are denoted by the same reference numerals.

Among them, the standing pouch A ₃₁ shown in FIG. 6 has a side seal portion 4 with a linear outer seal line of the side seal portion 4 and an inner seal line of the side seal portion 4 inclined toward the inside of the pouch. An inclined seal portion 4a is provided. For example, the inclined seal portion 4a is provided between the upper portion of the pouch and the upper end of the bottom portion of the gusset type. The inclined shape of the inclined seal portion 4a may be linear or curved. In FIG. 6, the inclined seal portion 4a is provided from the upper part to the center part of the pouch, and is provided so as to bend toward the inside of the pouch. By providing such an inclined seal portion 4a, it is possible to easily form a form along a V-shaped fold. Moreover, you may provide the inner side seal line of the side part seal part 4 so that it may incline toward the outer side of a pouch from the lower end of the inclination seal | sticker part 4a to the upper end of the bottom part of a gusset type. In FIG. 6, the inner seal line of the side seal portion 4 from the lower end of the inclined seal portion 4a to the upper end of the bottom portion of the gusset type is inclined toward the outside of the pouch and curved toward the inside of the pouch. Is provided.

On the other hand, in the standing pouch A ₄₁ of FIG. 7, the side seal portion 4 has a curved seal portion 4b in which the outer seal line of the side seal portion 4 curves toward the inside of the pouch. For example, the curved seal portion 4b is provided between the upper portion of the pouch and the upper end of the gusset-type bottom portion as shown in the figure. By providing such a curved seal portion 4b, the shape retention of the entire pouch can be improved.

In the standing pouch A ₅₁ of FIG. 8, the side seal portion 4 has an inclined seal portion 4a in which the inner seal line of the side seal portion 4 is inclined toward the inner side of the pouch, and the side seal. The outer seal line of the portion 4 has a curved seal portion 4b that curves toward the inside of the pouch. In FIG. 8, the inclined seal portion 4a is provided from the top to the center of the pouch and is provided so as to curve toward the inside of the pouch, and the side seal from the lower end of the inclined seal portion 4a to the upper end of the bottom of the gusset type. The inner seal line of the portion 4 is provided so as to incline toward the outside of the pouch and to bend toward the inside of the pouch, and the curved seal portion 4b of the side seal portion 4 extends from the top of the pouch to the upper end of the gusset-type bottom portion. It is provided over.

  In the standing pouch of the present invention, a ruled line may be formed at a fold line α where the base piece 7 and the folded piece 8 are connected. As shown in FIG. 9, the ruled line is provided so that when the folded piece 8 is folded, the base piece 7 and the folded piece 8 protrude from the opposite surface to the opposite surface. Thus, by providing the ruled line on the folding line α, it is possible to easily maintain the folded-back piece 8.

  The standing pouch of the present invention is not limited to the configuration in which the two wall surface films forming the body and the bottom film folded in two are combined, and may be composed of a single film. In that case, the bottom seal portion may or may not be formed. Thus, in the form which comprises a standing pouch with one film, after filling the content from the upper part, after forming and sealing an upper seal part, a folding piece is formed.

When the standing pouch of the present invention is configured by combining the two wall film 1 forming the body and the bottom film 2 folded in two, the upper seal portion 6 is closed after filling the contents, and then the base piece 7 is closed. Rather than folding the folded piece 8, the standing pouch A ₆₁ as shown in FIG. 10, that is, only the gusset of the bottom film 2 is sealed, and the upper seal portion 6 and the folded piece 8 are formed. The pouch A ₆₁ may be used to form the bottom seal after filling and sealing the contents from the bottom.

  In the standing pouch of the present invention, the width of the side seal portion 4 is preferably 7 mm or more, and more preferably 10 mm or more. When the width of the side seal portion 4 is set to 10 mm or more, it is possible to easily suppress the waist break even for retort use. As a film constituting a standing pouch for retort use, at least a laminated film in which a base material layer, a barrier layer, and a sealant layer are laminated in order from the outside can be used, for example, PET, aluminum foil, A laminated film in which CPPs are laminated can be used.

  The standing pouch of the present invention is not limited to the embodiment described above, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

  For example, in the above example, the folded piece is provided from one end to the other end in the width direction of the upper seal portion, but the folded piece is at least as long as it acts to give tension to the wall film. What is necessary is just to be provided so that the center part of the width direction of an upper seal part may be included.

  The standing pouch of the present invention is preferably used mainly for storing and selling liquids, but can also be used for storing powders, granules and the like that behave like liquids. .

A ₁ , A ₁₁ , A ₂ , A ₂₁ , A ₃₁ , A ₄₁ , A ₅₁ , A ₆₁ Standing Pouch 1 Wall Film 2 Bottom Film 2a Notch 3 Bottom Seal Part 4 Side Seal Part 4a Curved Seal Part 4b Curved Seal Part 5 Opening Notch 6 Upper Seal Part 61 Upper Seal Part Expected Part 7 Base Piece 71 Base Part Expected Part 8 Folded Piece 81 Folded Piece Expected Part 9 Wide Seal Part 91 First Part of Wide Seal Part 92 Second Part of Wide Seal Part α fold line α1 fold line planned part

Claims (3)

A two-fold bottom film is disposed between the two wall films forming the body, and the upper seal part where the two wall films are sealed and the side where the two wall films are sealed A standing pouch having a bottom seal portion where the wall film and the bottom film are sealed, and a gusset portion at the bottom, the top seal portion being attached to the base piece via a base piece and a fold line The folded piece is formed in a continuous manner and folded back toward the bottom , and the folded piece is provided so as to include at least the center portion in the width direction of the upper seal portion, and the base piece and the folded piece are bonded. Standing pouch characterized by not being.   The standing pouch according to claim 1, wherein the folded piece is provided from one end to the other end in the width direction of the upper seal portion.   The standing pouch according to claim 1, wherein the standing pouch has a wide seal portion provided continuously to the side seal portion, and the wide seal portion is provided at an upper portion of the pouch.

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