JPH10129683A - Standing pouch - Google Patents

Abstract

(57) [Problem] To provide a standing pouch in which a partial spout is formed simply by cutting off a predetermined portion of a pouch upper seal portion, and the contents can be safely and smoothly poured out to the end. SOLUTION: In a standing pouch of a normal form having an opening at an upper part, a heat seal pattern of an upper opening is formed in a shape capable of sealing the entire width of the opening at an upper edge of a wall film 2, and is connected below the same. In a portion, the shape is such that a neck-shaped unsealed portion 4 can be formed so that an opening can be partially formed.
The fold line 5a has a predetermined length and divides the neck-shaped unsealed portion 4 into two parts to the right and left and extends below the pouch, and the fold line 5a passes through the end of the neck-shaped unsealed portion 4 on both sides of the fold line. Symmetrical fold lines 5b and 5c extending in the lower end direction are provided symmetrically in the front-rear direction, and notches 8a and 8
The standing pouch 10 is constructed by providing “b”.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a standing pouch used for hermetically packaging fluid contents such as liquids and powders. The present invention relates to a standing pouch provided with a simple type spout so that it can be transferred to a pouch.

[0002]

2. Description of the Related Art Conventionally, standing pouches are self-supporting and have the characteristics of a three-dimensional container despite being formed of a soft packaging material such as a plastic film. Widely used as containers. However, regarding the opening, a method of removing and opening the entire upper portion from the notch provided on the upper part of the standing pouch, a method of cutting off the corner of the upper seal portion with scissors and opening it, and using this as a spout, Is
A method in which a spout with a separate cap such as a plastic molded product is attached to the upper opening in advance by thermal bonding or the like, and the cap is removed to open.
And so on.

[0003]

However, the method of removing and opening the entire upper portion of the standing pouch is problematic in that, especially when the contents are liquid, the pouch is soft and easily overflows from the upper portion when held by hand. There is.
Also, the method of cutting off the corner of the upper seal portion and opening it and using it as a spout can reduce the risk of accidentally overflowing the contents as compared with the above method in that the opening can be narrowed. However, when the opening is narrower, the film on both sides of the opening is more likely to adhere to each other on the inner surface, so it is difficult to continuously pour the film to the end with a stable flow. There is a problem that it is necessary to squeeze and push out.

[0004] In addition, a method in which a spout with a cap or the like is attached to the upper opening in advance by heat bonding or the like and the cap is removed to open the opening is performed in advance by adjusting the size of the opening or the like to determine the properties of the contents or the like. Since a stable shape can be set so as to be suitable for the pouring condition, the safety and stability of pouring are superior to those of the above method. But,
When the spout of such a plastic molded product is attached to the standing pouch, the packaging bag becomes bulky,
Since the filling of the contents needs to be performed from a spout having a small hole diameter, a special filling device is required. Further, the cost of the spout is extra, so that there is a drawback that the cost for packaging is greatly increased.

The present invention has been made in view of such a situation, and an object of the present invention is to eliminate the need for a separate spout for a molded article or the like, to facilitate the filling of contents,
Moreover, an object of the present invention is to provide a standing pouch with a simple spout that can be safely and smoothly poured out to the end by forming a spout simply by cutting off a predetermined portion of an upper heat seal portion of the pouch.

[0006]

The above objects can be achieved by the present invention described below. That is, according to the first aspect of the present invention, the bottom portion is formed in a gusset format in which the film is folded inward, the body portion is formed of two front and rear wall films, and the upper opening portion is hermetically sealed by heat sealing. In the type of standing pouch, the heat seal pattern used to seal the opening, at the upper edge of the wall film, a shape capable of sealing the entire width of the opening,
In the part connected below it, when the upper edge of the wall film is cut off and opened, a shape that can form a neck-shaped unsealed part so that an opening can be partially formed in the entire width of the opening In addition, on the surface of the wall film on which the neck-shaped unseal portion is provided, the neck-shaped unseal portion is divided into two sides, and a fold line of a predetermined length extending downward in the pouch; Are provided on both sides of the neck-shaped unsealed portion, and an oblique fold line extending in the lower end direction of the fold line is provided symmetrically on the two wall films, and the upper opening is opened when the pouch is opened. The standing pouch is characterized in that the upper part of the pouch is cut off from one of the right and left ends of the sealing part to be hermetically traversed through the neck-shaped unsealed part and opened.
According to a second aspect of the present invention, in the standing pouch according to the first aspect of the invention, a notch is provided on at least one of right and left ends of a portion where the neck-shaped unsealed portion is provided. .

By adopting such a configuration, for example, when using a standing pouch filled with a liquid or the like and sealed therein, the neck-shaped unsealed portion is removed from one of the right and left ends of the upper seal portion. Cut and open the top of the pouch so that it crosses, hold the pouch by hand and tilt it, so that the pressure due to the contents is applied to the top inside the pouch, and the top of the pouch is pushed outward and at the same time,
The fold line provided in this portion is bent, the neck-shaped unsealed portion is opened, and a spout is formed. Since the spout serves as a guide for the contents to be poured out, the contents can be safely and smoothly poured out to the end. If a notch is provided at least at one of the left and right ends of the upper seal portion where the neck-shaped unsealed portion is provided, the notch is used as a starting point without using scissors. The top of the pouch can be easily torn open by hand.

According to a third aspect of the present invention, there is provided a standing pouch having a bottom portion formed in a gusset form in which a film is folded inward, a body portion formed of two front and rear wall films, and an opening at an upper portion. , A convex portion is connected to a part of the upper end of the front and rear wall surfaces of the upper opening in a symmetrical manner in the front-rear direction, and the two wall surface films have the convex portion from the upper central portion of the convex portion. The fold line is divided into two parts to the left and right, and a fold line of a predetermined length extending downward from the pouch, and an oblique fold line extending from the left and right sides of the projection to the lower end direction of the fold line are provided symmetrically in the front-rear direction. And a standing pouch characterized in that an upper opening is sealed by heat sealing in a predetermined pattern at an upper edge of the wall film. According to a fourth aspect of the present invention, in the standing pouch according to the third aspect of the present invention, a notch is provided on at least one of right and left ends of the projection.

By adopting such a configuration, when using a standing pouch filled and sealed with the contents, the upper part of the convex portion is cut out and opened, and the standing pouch is held and tilted by hand, whereby the contents are tilted. The pressure of the object is applied to the upper part in the pouch, and the upper part of the pouch including the uncut portion of the convex portion is pushed outward, and at the same time, the fold line provided in this portion is bent and the cross section becomes rhombic. Since a spout such as a shape is formed, this portion serves as a guide port for the content to be poured out, and the content can be safely and smoothly poured out to the end. When a notch is provided at the side end of the projection, the notch can be easily used as a starting point to remove the upper portion of the projection by hand and open.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention, such as a method for manufacturing a standing pouch, will be described below. First, the material used for manufacturing the standing pouch of the present invention is not particularly limited, and any of the materials used for known standing pouches can be used, including the type of contents to be packed and the presence or absence of heat treatment after filling. For example, a suitable material can be freely selected and used according to use conditions.
However, in the standing pouch of the present invention, a fold line is provided in order to form a spout, and a material that is easily creased, for example, aluminum foil, cellophane, paper, a laminated film in which synthetic paper and the like are laminated is particularly preferable. A high-density polyethylene film or a polypropylene film is relatively easy to be creased even if it is a plastic material, and a laminated film in which these are laminated by film lamination or extrusion coating is also suitable.

Specific examples of the laminated film include ON film / adhesive / L / LDPE film (sealant layer) ON film / adhesive / HDPE film / adhesive /
L / LDPE film ON film / adhesive / OPP film / adhesive / L
・ LDPE film ON film (silica vapor deposition layer) / adhesive / HDPE film / adhesive / L ・ LDPE film ON film / anchor coat layer / co-extrusion (HD
PE / L / LDPE) ON film / anchor coat layer / co-extrusion (HD
PE / LDPE) / adhesive / L / LDPE film PET film / adhesive / aluminum foil / adhesive /
ON film / adhesive / L / LDPE film PET film / adhesive / aluminum foil / adhesive /
ON film / adhesive / CPP film PET film / adhesive / EVOH film / adhesive / ON film / adhesive / CPP film, etc., but are not limited thereto, and use various combinations of laminated films. can do.

In the above, the ON film is a biaxially stretched nylon film, L / LDPE is a linear low density polyethylene, HDPE is a high density polyethylene, LDPE is a low density polyethylene, an OPP film is a biaxially stretched polypropylene film, PET The film refers to a biaxially oriented polyethylene terephthalate film, the EVOH film refers to a saponified ethylene-vinyl acetate copolymer film, and the CPP film refers to a non-stretched polypropylene film. In addition, the anchor coat is a kind of primer coat that is previously coated on the base film side in order to improve adhesiveness when laminating a resin by an extrusion coating method.

[0013] In the construction of the laminated film, the sealant layer is composed of an L-LDPE film and a CPP film.
Examples of types are shown, but L-LDPE film is excellent in heat seal stability and content resistance (eg, stress cracking resistance to interfacial lubricant), and CPP film is excellent in heat resistance, low odor, etc. I have. As the sealant layer, in addition to the above, ethylene
A layer composed of an α-olefin copolymer, an ethylene / vinyl acetate copolymer, an ethylene / acrylic acid copolymer, an ethylene / acrylate ester copolymer, an ionomer, polybutene, or the like can be appropriately selected and used.

In particular, in the case of the standing pouch of the present invention, when a fold line is provided in advance at a predetermined position of the upper opening of the pouch before heat sealing, a step due to the fold line is generated in the heat seal portion. There is. In such a case, as a sealant layer, it is possible to obtain a stable seal by using an ethylene / α-olefin copolymer polymerized using a metallocene catalyst having excellent low-temperature heat sealability and hot sealability. preferable. Unlike conventional multi-site catalysts in which the active sites are heterogeneous, metallocene-based catalysts are called single-site catalysts in which the properties of active sites are uniform, and ethylene-α-olefin copolymers polymerized using this are Since the width of the molecular weight distribution is narrow and the copolymerization ratio is stable, it has excellent low-temperature heat sealability and hot sealability. The ethylene / α-olefin copolymer may be further blended with an olefin-based elastomer, whereby the heat fluidity is further improved, and the effect of reliably preventing pinholes due to steps can be obtained. .

Next, a method for manufacturing a standing pouch of the present invention, which is manufactured using the above-described laminated film, will be described. First, the standing pouch according to the first or second aspect of the invention differs from the conventional standing pouch in the configuration in that the shape of the heating plate for heat-sealing the upper opening, that is, the heat-sealing pattern is applied to the wall film. The upper edge has a shape capable of sealing the entire width of the opening, and the portion connected thereunder is changed to a shape having a neck-shaped unsealed portion so that a partial opening is provided. A fold line having a predetermined shape is provided at a position including the opening of (1) to form a spout. Such heat seal patterns and fold lines can be designed and determined in advance according to the dimensions of the standing pouch, the properties of the contents to be filled, and the like.

The fold lines are preferably provided separately on both side wall films before filling the contents, that is, at the stage of bag making, but may be provided simultaneously on both side wall films after filling. A known crimping (embossing) method using a male type and a female type can be used as a method for providing the fold line. When forming a fold line in-line with bag making, a creasing device may be incorporated into a known standing pouch bag making machine, and when forming a fold line after filling, a streak is provided after the sealing device of the filling machine. A pushing device may be incorporated, or an independent crimping device may be provided and used to provide fold lines. In addition, after filling, when providing a fold line on both side wall films at the same time, the heating temperature is in a range in which the sealant layers are fused to each other on the inner surface or wrinkles are not generated by heating, preferably about 60 to 100 ° C. It is necessary to set it lower.

In order to cut off the upper seal portion and open a partial opening when opening the pouch,
A notch can be provided on at least one of the left and right ends of the portion of the upper seal portion where the neck-shaped unsealed portion of the heat seal pattern is provided. By providing such a notch, it is possible to easily tear in the lateral direction by hand to provide a partial opening by the neck-shaped unsealed portion. If the pouch wall film material does not allow sufficient tearing in the horizontal direction due to the notch, a half-cut line may be provided on the surface of the front and back wall film to be opened by laser light irradiation, or a straight cut may be made. Auxiliary means such as laminating or attaching a good cut film may be used together with the notch, or a cutting line may be printed at a desired position in advance and cut with scissors.

Next, in the standing pouch according to the third or fourth aspect of the present invention, a symmetrical convex portion is connected to the upper end of the front and rear wall films of the upper opening of the pouch,
And, on the two wall films, the convex part is divided into two parts from the upper part of the central part of the convex part to the left and right, and a fold line of a predetermined length extending downward of the pouch, and from the left and right sides of the convex part An oblique fold line extending in a lower end direction of the fold line is provided symmetrically in the front-rear direction, and an upper opening is sealed by heat sealing in a predetermined pattern at an upper edge of the wall film. In the standing pouch having the above-mentioned structure, a notch is provided at least at one of right and left ends of the convex portion.

In the above configuration, the shape of the protrusion is not particularly limited, and can be freely determined, for example, a triangle, a semicircle, an inverted U-shape, or the like. In addition, the predetermined pattern for heat sealing the upper opening with the upper edge of the wall film is a convex portion connected to a part of the upper end of the wall film. For example, 5
As a shape to be sealed with a seal width of about 7 mm, an unsealed portion is left inside, and in other portions, the upper edge of the wall film so as to be continuous with the lower end on both sides of the fixed width seal portion provided on the convex portion. May be formed in a shape that can be sealed.

A method of manufacturing a standing pouch having such a configuration is, for example, to incorporate a creasing line embossing device and a trimming device for forming a convex portion into a known standing pouch bag making machine. In-line, bottom seal, fold line formation, formation of protrusions by trimming, side sealing, cutting may be performed to make a bag, or after making a bag by a normal method, protrusions may be made by trimming offline. Can be formed and a fold line can be formed by creasing.

As described above, in the present invention, a standing pouch is provided with a partial opening and a spout through a fold line. However, it is apparent that such a spout is similarly provided in a flat pouch, a gusset pouch, and the like. It is.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below more specifically with reference to the drawings. However, the present invention is not limited to the drawings. Further, in different drawings, the same reference numerals are given to portions having the same name. FIGS. 1 and 2 are front views each showing the configuration of an embodiment of the standing pouch of the present invention.

The standing pouch 10 shown in FIG.
It is equivalent to the standing pouch of the invention described in claim 1 or 2, wherein the bottom portion 1 is formed in a gusset form in which the film is folded inward, and the body portion is formed by the two side edges of the front and rear wall film 2. The heat sealing pattern formed by heat sealing and used when the upper opening is sealed by heat sealing is formed in a shape capable of sealing the entire width of the opening at the upper edge of the wall film 2, and is connected thereunder. In the portion to be formed, the neck-shaped unsealed portion 4 is formed so that an opening can be partially formed, and the neck-shaped unsealed portion 4 of the wall surface film is provided with the neck-shaped unsealed portion 4. The unsealed part 4 is divided into two parts left and right, and a fold line 5a of a predetermined length extending downward of the pouch, and the fold line
Diagonal fold lines 5b and 5c passing through the end of the neck-shaped unsealed portion 4 and extending toward the lower end of the fold line 5a are provided symmetrically on the two wall films 2 on both sides of 5a. Film 2
Notches 8a and 8b are provided at both ends of the portion where the neck-shaped unsealed portion 4 is provided.

In the standing pouch having the above structure, although not shown in the drawing, the neck-shaped unsealed portion 4 of the heat seal pattern for heat-sealing the upper opening is elongated in the vertical direction, and furthermore, on both sides thereof. The upper part of the neck is cut out and opened by providing a perforated line etc. so as to leave a fixed width seal part on the shoulder and the shoulder, and the corners on both sides are removed with this perforated line A spout having a shape protruding above the pouch may be provided.

The standing pouch 10 shown in FIG.
It is equivalent to the standing pouch of the invention described in claim 3 or 4, wherein the bottom portion 1 is formed in a gusset form in which the film is folded inward, and the body portion is formed on both side edges of the front and rear wall film 2. A convex portion 7 is connected to a part of the upper end of the wall film 2 on the front and rear sides of the upper opening in a symmetrical manner in the front-rear direction.
The wall surface film 2 has a fold line 5a having a predetermined length extending downward from the center of the protrusion 7 into two parts, and extending downward from the pouch. The fold line 5a from both sides
The fold lines 5b and 5c extending in the lower end direction are provided symmetrically in the front-rear direction, and notches 8a and 8b are provided at both ends of the convex portion 7. The upper edge portion 2 is sealed by heat sealing in a predetermined pattern.

As described above, in the standing pouch 10 having the structure shown in FIGS. 1 and 2, the contents are usually filled from this portion before the upper opening is sealed, and the respective heat seals are filled after the filling. It is sealed by heat sealing with a pattern, but as an application example, all or part of one of the seals in the seals on both side edges of the pouch body is opened as unsealed, and the upper opening The portion may be sealed first with a predetermined heat seal pattern, the contents may be filled from the unsealed side, and finally this portion may be heat sealed to complete the package.

FIGS. 3 and 4 correspond to FIGS. 1 and 2, respectively.
The package is filled with the contents in a standing pouch having the structure shown in (1), heat-sealed and sealed, and cut at each cut line (6) to open the package. It is a perspective view which shows the state at the time of pouring out the content from the exit.

[0028]

As described in detail above, according to the present invention, there is no need to attach a separate spout made of a molded article or the like, and the contents can be easily filled from a wide opening when filling the contents. In use, the pouch can be easily cut off to provide a partial opening at the top of the pouch, and the opening is provided with a fold line. As a result, a spout having a more stable shape is formed, and an effect of providing a standing pouch that can be smoothly poured out to the end without spilling the contents around is obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of an embodiment of a standing pouch of the present invention.

FIG. 2 is a front view showing the configuration of another embodiment of the standing pouch of the present invention.

FIG. 3 is a perspective view showing a state when the standing pouch having the configuration shown in FIG. 1 is used (during pouring).

4 is a perspective view showing a state when the standing pouch having the configuration shown in FIG. 2 is used (during pouring).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom part 2 Wall film 3 Heat seal part 4 Neck-shaped unseal part 5a, 5b, 5c Fold line 6 Cut-out line 7 Convex part 8a, 8b Notch 10 Standing pouch

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hidehiko Masaki 1-1-1, Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd.

Claims (4)

[Claims] 1. A standing pouch in which a bottom portion is formed in a gusset format in which a film is folded inward, a body portion is formed of two front and rear wall films, and an upper opening portion is sealed by heat sealing. The heat seal pattern used for sealing the opening was formed in such a shape that the entire width of the opening could be sealed at the upper edge of the wall film, and the upper edge of the wall film was cut off and opened at the portion connected below the opening. At this time, in the entire width of the opening, the shape of the neck-shaped unsealed portion can be formed so that the opening can be partially formed, and the surface of the wall film where the neck-shaped unsealed portion is provided, The neck-shaped unsealed portion is divided into two parts to the left and right, a fold line of a predetermined length extending downward of the pouch, and the end of the neck-shaped unsealed portion on both sides of the fold line, toward the lower end direction of the fold line Extending diagonal fold A line is provided symmetrically on the two wall films, and when opening the pouch, the top of the pouch crosses the neck-shaped unsealed portion from either one of the left and right ends of the sealing portion sealing the upper opening when the pouch is opened. A standing pouch characterized by being cut out and opened. 2. A notch is provided on at least one of right and left ends of a portion of the standing pouch where a neck-shaped unsealed portion is provided.
The standing pouch described. 3. A standing pouch having a bottom portion formed in a gusset form in which a film is folded inward and a body portion formed of a front and rear wall surface film and having an opening at an upper portion. A convex portion is connected to a part of the upper end of the surface wall film in a front-rear symmetrical manner.
On the wall film of the surface, the convex portion is divided into two parts left and right from the upper part of the central part of the convex portion, and a fold line of a predetermined length extending downward of the pouch, and the fold line from both right and left sides of the convex portion And a diagonal fold line extending in the lower end direction is provided symmetrically in the front-rear direction, and the upper opening is hermetically sealed in a predetermined pattern at the upper edge of the wall film. 4. The standing pouch according to claim 3, wherein a notch is provided on at least one of the left and right ends of the projection.