JP7259268B2 - Standing pouch with opening shape retaining member - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pouch with a shape retaining member. In particular, it is a pouch of a form called a standing pouch that has a bottom film and is self-supporting, and is capable of retaining the shape of the opening when unsealed, and is excellent in the straightness of the unsealed cut, and retains the shape of the opening. It relates to a standing pouch with a member.

Pouches, which are a type of packaging material, are widely used as a single unit or a laminate made of plastic film as a base material. have become indispensable to people's lives.

For example, it is also used as a container for liquids, and is widely used in the food field such as beverages and retort pouches. In the field of daily necessities and toiletries, the product shelves of supermarkets, drug stores, and convenience stores are bustling with various products. . In addition to liquid containers, various applications have been developed.

The advantages of pouches are that they are cheaper than containers such as cans and bottles, that they can be made with detailed material design depending on the required quality, and that they are lightweight and space-saving before filling the content and during distribution and storage. There is one thing. In addition, pouches can be said to be environmentally friendly from the standpoint of reducing waste.

In addition, high-definition printing on the layer that can be seen from the surface can improve the image of the product, and it is possible to display necessary information about the contents. It is also a source of management and marketing information.

Among pouches, self-supporting pouches have also been commercialized and are generally called standing pouches. Further convenience has been achieved in taking out the contents by making the container self-supporting.

Furthermore, when opening the standing pouch after cooking, it is important to prevent burns caused by residual steam blowing out, to make the opening easy to open, and to maintain the shape of the opening.

The retention of the shape of the opening is, for example, when the contents are food, and when the contents are taken out directly from the pouch using tableware such as a spoon or fork and eaten, the opening does not close and the shape is open. should be maintained. At the same time, it is preferable that the opening for unsealing is cut linearly at a predetermined position.

Patent Document 1 discloses a packaging bag capable of maintaining an unsealed shape by means of a planned opening line and a shape-retaining member separately provided on the content side of the planned opening line. was not necessarily considered.

In addition, above the shape-retaining member, the plastic film of the pouch body or a material such as a laminate surrounds the opening as an unsealing opening. There is a risk that the shape of the plastic film or laminate will be indeterminate.

For example, when the food contents are taken out directly from the pouch using tableware such as a spoon or fork and eaten, it is difficult to take out the contents, and the contents tend to adhere to the opening, resulting in poor appearance. However, it lacked beauty, and there was a risk of reducing its commercial value.

In convenience stores and the like, many foodstuffs are generally provided to consumers in trays, plastic containers, standing pouches, or the like. Of these, the trays and plastic containers had to be washed and discarded after the contents were gone. However, it has been difficult to implement in eat-in spaces of convenience stores and eating outdoors.

In particular, among standing pouches, those with a general zipper have an unstable pouch opening that is prone to clogging, making it unsuitable for direct eating from the pouch, making it difficult to take out the contents and put in and take out dishes. It was difficult.

JP-A-2018-83640

The present invention has been made in view of such circumstances, and in a standing pouch, in addition to the ease of opening the opening, the shape of the opening can be maintained and the cut of the opening is excellent in linearity. An object of the present invention is to provide a standing pouch with an opening shape retaining member.

As a means for solving the above problems, the invention according to claim 1,
In a standing pouch made of a laminate having a plastic film layer and a sealant layer,
The pouch consists of a front body, a back body, and a bottom film disposed therebetween, and a tape of high density polyethylene,
The tape-shaped high-density polyethylene is uniaxially stretched in the length direction, and has a shape-retaining function that can retain deformation such as bending and bending.
The front trunk portion and the rear trunk portion have four sides, and the sealant layers are arranged to face each other,
Of the four sides, both left and right ends are sealed, and both ends of the body are sealed,
a bottom film is folded and arranged and expandably sealed at the lower body portion between the front and rear body portions, and the lower pouch portion is sealed to form a bottom surface;
In the upper part of the body, the front side body part and the rear side body part are sealed by the upper end sealing part after filling the contents, and the whole pouch can be sealed,
Below the upper end seal portion, on the surface of the sealant layer of the front body portion, the rear body portion, or both of the laminates, the tape-like high density polyethylene is applied to the left and right in the same direction as the upper end seal portion. It is arranged and stacked as a planned opening line connecting both ends,
At least one of the left and right ends is provided with a notch in the tape-shaped laminate containing high-density polyethylene,
The standing pouch with opening shape retaining member is characterized in that the tip of the cut is provided above the center in the vertical direction of the width of the tape-shaped high-density polyethylene at the end of the pouch.

In addition, the invention according to claim 2 ,
2. The standing pouch with an opening shape retaining member according to claim 1 , wherein the tape-shaped high-density polyethylene is laminated on the sealant layer by heat welding.

In addition, the invention according to claim 3 ,
1 or 2, wherein the tape-shaped high-density polyethylene is laminated with a linear low-density polyethylene layer on either the front surface or the back surface, or both surfaces thereof.
is a standing pouch with an opening shape retaining member according to claim 2 .

Further, the invention according to claim 4 ,
The standing pouch with an opening shape retaining member according to any one of claims 1 to 3 , wherein a gas barrier film layer having an inorganic compound deposited on the surface is included in the laminate constituting the standing pouch. is.

To provide a standing pouch with an opening shape-retaining member, in which the shape of the opening can be maintained and the cut end of the opening is excellent in straightness, in addition to the ease of opening the opening of the standing pouch. It is possible.

In particular, according to the invention of claim 2, the tip of the slit is provided above the center in the vertical direction of the width of the tape-shaped high density polyethylene at the end of the pouch, so that the pouch body after opening is At the end of the opening, a wider tape-like high-density polyethylene remains, so that the shape retention is more stable.

In particular, according to the third aspect of the invention, the tape-shaped high-density polyethylene is adhered by heat welding, so that the influence of the adhesive or the like on the contents can be eliminated.

In other words, since the tape-shaped high-density polyethylene is placed on the innermost layer of the pouch, that is, on the side that contacts the contents, there is concern about the effect of adhesion with adhesives, etc., but with heat welding, there is no effect other than polyethylene. Therefore, it is convenient.

According to the fourth aspect of the invention, the linear low-density polyethylene is laminated on the tape-shaped high-density polyethylene, so that the tape-shaped high-density polyethylene can be heat-sealed, and the tape-shaped high-density polyethylene can be attached. , is convenient in terms of ease and productivity. In addition, by this welding, the tape-like high-density polyethylene can function as an unsealing line.

Moreover, according to the fifth aspect of the invention, the content can be protected from the external environment, particularly the influence of oxygen, by including a gas barrier film layer in which an inorganic compound is vapor-deposited on the surface of the laminate. .

For example, if the contents are foodstuffs or substances that are easily oxidized, it is effective in improving the preservability. In addition, compared to gas barrier layers made of metal, it has transparency, the contents can be seen from the outside of the pouch, and it is also suitable for applications such as high-frequency heating, and can be used in inspection machines equipped with metal detectors. It is also possible to have aptitude.

FIG. 1 is a schematic plan view for explaining one embodiment of the standing pouch according to the present invention. FIG. 2 is a perspective (partially see-through) schematic diagram for explaining an unsealed state in one embodiment of the standing pouch according to the present invention. FIG. 3 is a schematic plan view for explaining Example 1 of the standing pouch according to the present invention. FIG. 4 is a schematic plan view for explaining Example 2 of the standing pouch according to the present invention. FIG. 5 is a schematic plan view for explaining Example 3 of the standing pouch according to the present invention. FIG. 6 is a schematic plan view for explaining Comparative Example 1 of the standing pouch according to the present invention. FIG. 7 is a schematic plan view for explaining Comparative Example 2 of the standing pouch according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings. However, the invention is not limited to the examples shown here. The invention is limited by the claims.

FIG. 1 is a schematic plan view for explaining one embodiment of the standing pouch according to the present invention.

The present invention is a standing pouch (100) made of a laminate having a sealant layer in addition to a plastic film layer, and in addition to the ease of opening the opening, it is possible to maintain the shape of the opening, and A standing pouch (100) with an opening shape-retaining member having excellent straightness of the cut edge of the opening.

The pouch consists of a front body (1), a back body (8), a bottom film (6) disposed therebetween, and a tape-like high density polyethylene (9). 1) and the rear trunk (8) have four sides, the sealant layers are arranged facing each other, and of the four sides, the left and right end seal portions (2) are used to seal the trunk. Both ends are sealed.

In the present invention, the tape-shaped high-density polyethylene (9) is uniaxially stretched in the length direction and has a shape-retaining function that can retain deformation such as bending and bending. . By this uniaxial stretching, the polyethylene molecules have molecular orientation in the stretched direction.

In the lower body part (11), between the front body part (1) and the rear body part (8), the bottom film (6) is folded in a mountain fold at the folding line (10) and is expandably sealed. Then, the body lower part (11) of the standing pouch (100) is sealed so that the bottom film (6) can form the bottom surface.

In this way, the bottom film (6) is expandably sealed at the lower body portion (11) of the standing pouch (100) so that the bottom film (6) forms the bottom surface when the contents are filled. and the standing pouch (100) is self-supporting.

In addition, in the upper body part, the front body part (1) and the rear body part (8) are sealed by the upper end seal part (4) after filling the contents, and the whole standing pouch (100) is sealed. It is possible.

In addition, below the upper end seal portion (4), a tape-like high density polyethylene (9) is applied to the surface of the sealant layer of the front body (1) or the rear body (8) or both laminates. is arranged and adhered as an unsealing line (7) connecting the right and left end seal portions (2) in the same direction as the upper end seal portion (4).

In addition, in at least one end seal portion of the right and left end seal portions (2), a cut (5) is provided in the laminate containing the tape-shaped high-density polyethylene (9). Using this cut (5) as a trigger, the opening line (7), that is, the tape-like high-density polyethylene (9) can be cut to open the standing pouch (100) with the opening shape retaining member.

The notch (5) may be provided only in one end seal portion, or may be provided in both right and left end seal portions (2). As in the example shown in FIG. 1, when the right and left end seal portions (2) are provided respectively, the opening of the standing pouch (100) is more convenient.

That is, the tape-shaped high-density polyethylene (9) itself has polymer orientation in the stretching direction, and is easily torn in the stretching direction, so that the cut (5) triggers the tape-shaped high-density polyethylene. It is possible to open the polyethylene (9) itself by tearing it in line with the intended opening line (7).

The tip of the notch (5) is provided in the laminate containing the tape-like high-density polyethylene (9) at the end of the standing pouch (100), so that the intended opening line (7) is torn for opening. After the upper end seal (4) is separated, the tape-like high-density polyethylene (9) remains around the edge of the opening on the main body side of the standing pouch (100), and has a shape-retaining function. can be stably exhibited.

Also, the tip of the cut (5) can be provided above the vertical center of the width of the tape-shaped high-density polyethylene (9) at both left and right ends of the standing pouch (100). In this case, the planned opening line (7) is included in the upper half of the width of the tape-shaped high-density polyethylene (9).

That is, the tip of the notch (5) is provided above the center in the vertical direction of the width of the tape-shaped high-density polyethylene (9) at the left and right ends of the standing pouch (100). After the planned line is torn and the upper end seal part (4) is separated, the tape-like high density polyethylene (9) borders the end of the opening on the main body side of the standing pouch (100) for more than half of the width. This is more convenient for stably exhibiting the shape retention function.

FIG. 2 is a perspective (partially see-through) schematic diagram for explaining an unsealed state in one embodiment of the standing pouch according to the present invention.

To open, cut the side end seal part as a trigger, tear the planned opening line (7) connecting the left and right end seal parts (2), and separate the upper body part (12) in the direction of the arrow in the figure. will be served. At this time, the polyethylene molecules of the tape-shaped high-density polyethylene (9) are stretched in the longitudinal direction and have orientation, so that they can be easily torn along the expected opening line (7).

Therefore, since the planned opening line (7) is included in the width of the tape-shaped high-density polyethylene (9), when the standing pouch (100) with opening shape retaining member is opened, the main body The opening (13) can be covered with a tape-like high density polyethylene (9) so as to surround its edges.

In addition, the tape-like high-density polyethylene (9) used in the standing pouch (100) with an opening shape retaining member according to the present invention is uniaxially stretched in the length direction and deformed such as by bending or curving. It has a shape-retaining function that can hold

That is, the end of the opening (13) of the main body of the standing pouch (100) with opening shape retaining member is in a state where the tape-like high-density polyethylene (9) surrounds and covers, and the tape-like The high-density polyethylene (9) of is uniaxially stretched in the length direction and can retain deformation such as bending and bending, so that the shape of the opening (13) is more stably retained. be.

Thus, in the standing pouch (100) with an opening shape retaining member according to the present invention, in addition to the ease of opening the opening (13), the shape of the opening (13) can be maintained and the opening It is possible to provide a standing pouch (100) with an opening shape-retaining member having excellent straightness of the cut end of the portion (13).

In the standing pouch (100) with an opening shape retaining member according to the present invention, the tape-shaped high-density polyethylene (9) can be adhered to the sealant layer by heat welding.

That is, since the tape-shaped high-density polyethylene (9) is arranged on the innermost layer of the pouch, that is, on the side in contact with the contents, there is concern about the effect of adhesion with an adhesive or the like. There is no influence of , which is convenient.

In the standing pouch (100) with an opening shape retaining member according to the present invention, the tape-shaped high-density polyethylene (9) is laminated with a linear low-density polyethylene layer on either the front or back or on both sides. can do.

That is, since the linear low-density polyethylene is laminated on the tape-shaped high-density polyethylene (9), heat sealing is possible, and the attachment of the tape-shaped high-density polyethylene is easy, and productivity is improved. But it's convenient. Also, this welding allows the tape-like high-density polyethylene (9) to function as an unsealing line.

In the standing pouch (100) with an opening shape retaining member according to the present invention, the laminate constituting the standing pouch (100) may include a gas barrier film layer having an inorganic compound vapor-deposited on the surface.

That is, by including a gas barrier film layer in which an inorganic compound is vapor-deposited on the surface of the laminate, the contents can be protected from the external environment, particularly the influence of oxygen.

For example, if the contents are foodstuffs or substances that are easily oxidized, it is effective in improving the preservability. In addition, compared to gas barrier layers made of metal, it has transparency, the contents can be seen from the outside of the pouch, and it is also suitable for applications such as high-frequency heating, and can be used in inspection machines equipped with metal detectors. It is also possible to have aptitude.

Thus, according to the present invention, in the standing pouch (100), the opening (13
), the shape of the opening (13) can be maintained, and the cut end of the opening (13) has excellent linearity. It is possible to provide

Next, the individual materials used for the standing pouch with opening shape retaining member (100) according to the present invention will be described.

<Tape-shaped high-density polyethylene>
By highly uniaxially stretching high density polyethylene (HDPE), a sheet with uniaxial molecular alignment can be produced. This polyethylene is sold as a product by material manufacturers as shape-retaining polyethylene.

Polyethylene with a shape-retaining function has the property of being able to freely change its shape like a wire by applying an external force. In addition, this property allows repeated use, and punching and lamination are possible. Moreover, since it is a polyethylene material, it is lightweight, recyclable or incinerable, and is an environment-adaptive material.

In addition, polyethylene with a shape-retaining function does not rust unlike wires, and since it is polyolefin, it is easy to recycle, and in some cases, even if it is incinerated, there is no risk of generating toxic gases or the like.

In the present invention, by arranging it at the end of the opening of the pouch and at the innermost layer of the pouch, when the pouch is opened, the opening is kept open and the shape is maintained, making it easy to take out the contents. Convenience.

Conversely, in the case of a general pouch that is not a standing pouch with an opening shape retaining member, the rigidity or elasticity of the laminate may cause the opening to close, resulting in difficulty in usability.

Further, even if a member having a shape-retaining function is used, it is difficult to cover the edge of the opening as in the present invention. Because it is formed by , the shape may be unstable or irregular.

<Plastic film layer>
In the present invention, the laminate constituting the standing pouch (100) with an opening shape-retaining member includes, in addition to the outermost plastic film layer, plastic films such as an intermediate film layer and a sealant layer. Moreover, when providing a gas barrier film layer, a plastic film is used as a base film.

The plastic film is a film made of a polymer resin composition, such as polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon-6, nylon-66, etc.), Polyimide or the like can be used, and is appropriately selected depending on the application.

In particular, when polypropylene or polyethylene terephthalate is used as a plastic film, it is preferable in terms of film strength and cost. In addition, when a stretched polyamide film is used, the laminate can be provided with toughness against puncture and toughness against impact.

Also, the plastic film can be laminated with another layer via an adhesive layer to form a laminate. The layer structure, material structure, thickness, etc. of the laminate can be appropriately designed according to the quality required for the pouch.

<Gas barrier film>
Further, for the purpose of improving the storage stability of the contents, for example, a gas barrier layer made of an inorganic compound can be provided in the laminate constituting the pouch. For example, a gas barrier film obtained by providing a gas barrier layer on the surface of a plastic film can be used.

Metal foil such as aluminum is also effective as a gas barrier layer, but is unsuitable for cooking in a microwave oven because it generates sparks due to high frequency.

In the case of the gas barrier film, the plastic film used is a film made of a polymer resin composition, such as polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide. (nylon-6, nylon-66, etc.), polyimide, etc. can be used, and are appropriately selected according to the application. In particular, when polypropylene or polyethylene terephthalate is used as the plastic film substrate, it is preferable in terms of film strength and cost.

In the case of a gas barrier film, the gas barrier layer can be composed of a vapor deposition layer of an inorganic compound and a coating layer. After providing an anchor coat on a plastic film, the vapor deposition layer and the coating layer are sequentially provided.

Urethane acrylate, for example, can be used for the anchor coat layer of the gas barrier film. For the formation of the anchor coat layer, a coating method that applies a printing method such as gravure coating with a paint in which a resin is dissolved in a solvent is used, and a generally known coating method can be used to form a coating film.

As a method for forming a vapor deposition layer, an inorganic compound such as SiO or AlO is coated on a plastic film provided with an anchor coat layer using a vacuum vapor deposition method, and an inorganic compound layer can be formed by a vacuum vapor deposition method. . Incidentally, the thickness of the deposited layer is preferably 15 nm to 30 nm.

As a method of forming the coating layer, an aqueous solution or water/alcohol A coating agent containing a mixed aqueous solution as a main component is applied on a film, and the film is dried by heating to form an inorganic compound layer by a coating method, whereby a coating layer can be obtained. At this time, the adhesion to the anchor coat layer can be improved by adding a silane monomer to the coating agent.

The inorganic compound layer has gas barrier properties even if it is only a coating film formed by a vacuum deposition method, but a coating layer, which is an inorganic compound layer formed by a coating method, is formed over a deposited layer, which is an inorganic compound layer formed by a vacuum deposition method, to form a gas barrier layer. be able to.

By combining these two layers, a reaction layer of both layers is generated at the interface between the inorganic compound layer by the vacuum deposition method and the inorganic compound layer by the coating method, or the inorganic compound layer by the coating method becomes the inorganic compound layer by the vacuum deposition method. A dense structure is formed by filling and reinforcing defects such as pinholes, cracks, and grain boundaries, or micropores.

As a result, the gas barrier film achieves higher gas barrier properties, moisture resistance, and water resistance, and is flexible enough to withstand deformation due to external force, so that it is suitable as a packaging material.

Moreover, when SiO is used as the gas barrier layer, the coating is transparent, so that the contents can be seen from the outside of the pouch. These may be properly used depending on the application and required quality.

<Sealant layer>
The sealant layer is made possible by stacking two laminates so that the sealant layers face each other and heat-sealing them by applying heat and pressure to adhere them to each other and form a pouch.

Among thermoplastic resins, polyolefin-based resins are generally used as the material for the sealant layer. Specifically, low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin. (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer, ethylene-methacrylic acid resin copolymer, blend resin of polyethylene and polybutene, homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, polypropylene-based resin such as propylene-α-olefin copolymer, and the like can be used.

The sealant layer can be formed by forming a film of molten resin using an extruder or the like to form a layer on the laminate. Alternatively, it is also possible to form a sealant layer on the surface of the laminate by laminating materials that have been formed into films in advance.

<Print layer>
If necessary, a printed layer is added to the layer visible from the outside of the pouch in the plastic film-based laminate for the purpose of improving the image of the product, displaying the necessary information about the contents, and improving the design. can be provided. The printed layer may be provided on the outermost layer of the pouch.

Moreover, the printed layer may be provided on a portion of the pouch, or may be provided over the entire surface of the pouch. Alternatively, as a method of providing a display portion without using a printed layer, it is possible to attach a printed seal to the surface of the pouch, for example.

Here, there are no particular restrictions on the printing method and printing ink, but among known printing methods and printing inks, the suitability for printing on plastic films, design properties such as color development and color tone, adhesion, and applications Depending on the situation, it may be selected as appropriate if the safety as a food container is taken into consideration.

For example, it can be selected from known printing methods such as gravure printing, offset printing, gravure offset printing, flexographic printing, silk screen printing, and inkjet printing. Among them, the gravure printing method can be preferably used in terms of productivity, suitability for printing on plastic films, and high definition of patterns.

Thus, according to the present invention, in the standing pouch (100), in addition to the ease of opening the opening (13), the shape of the opening (13) can be maintained, and the shape of the opening (13) can be maintained. It is possible to provide a standing pouch (100) with an opening shape-retaining member having excellent straightness of the cut end.

The present invention will be described in more detail with reference to Examples 1 to 3 and Comparative Examples 1 and 2 below. However, the invention is not limited to the examples shown here. The invention is limited by the claims.

Evaluation samples of standing pouches were prepared for Examples 1 to 3 according to the present invention and Comparative Examples 1 and 2 for comparison, the contents were put in, sealed, opened, and the contents were taken out. evaluated.

FIG. 3 is a schematic plan view for explaining Example 1 of a standing pouch with an opening shape retaining member according to the present invention.

That is, the evaluation sample is unsealed and opened,
・The upper side is 150mm
・Bottom side is 130mm
・Height is 155mm
・The length from the bottom edge to the notch is 100mm
is.
This dimension is common to all the samples of Examples 1-3 and Comparative Examples 1-2.

The layer structure of the laminate constituting the pouch is as follows.
From the outside of the pouch,
Polyethylene terephthalate film (thickness 12 μm)/stretched polyamide film (thickness 15 μm/linear low-density polyethylene (thickness 80 μm)
is.

The layer structure of the tape-shaped high-density polyethylene is as follows.
Linear low-density polyethylene (thickness 30 μm)/tape-like high-density polyethylene (thickness 400 μm/linear low-density polyethylene (thickness 30 μm)
is.

The tape-shaped high-density polyethylene was laminated on the innermost layer of the pouch, and the lamination was performed by welding.

The contents of the evaluation samples of Examples and Comparative Examples of standing pouches with an opening shape retaining member are as follows.
・Contents: Hamburg steak.

The evaluation items of the evaluation samples of Examples and Comparative Examples of the standing pouch with opening shape retaining member are the following four items.
・Ease of opening, retention of the opening, ease of taking out the contents with tableware, and beauty of the opening.

Evaluation methods for evaluation samples of Examples and Comparative Examples of standing pouches with an opening shape retaining member are as follows.
・A comparative sensory evaluation was performed on a scale of 1 to 5.
・There were five panelists.
・Evaluation points were 1 point (bad) . . . 5 points (good).

The pass/fail judgment of the evaluation samples of Examples and Comparative Examples of the standing pouch with opening shape retaining member is as follows.
・Comprehensive judgment was made with the average score of the four evaluation items.
・A score of 4 or more was regarded as a pass, and a score of less than 4 was regarded as a failure.

<Example 1>
FIG. 3 is a schematic plan view for explaining Example 1 of the standing pouch according to the present invention.

Below the upper end seal, tape-like high-density polyethylene is applied to the surface of the sealant layer of the front body and rear body laminates in the same direction as the upper end seal to connect the left and right ends. It is arranged and laminated along a planned line, and cuts are provided in the laminate containing tape-shaped high-density polyethylene at both left and right ends.

The tip of the cut is provided in the vertical center of the width of the tape-shaped high-density polyethylene at the end of the pouch (see the enlarged view in FIG. 3).

<Example 2>
FIG. 4 is a schematic plan view for explaining Example 2 of the standing pouch according to the present invention.

Below the upper end seal, tape-like high-density polyethylene is applied to the surface of the sealant layer of the front body and rear body laminates in the same direction as the upper end seal to connect the left and right ends. It is arranged and laminated along a planned line, and cuts are provided in the tape-shaped laminated body containing high-density polyethylene at both right and left ends. This is the same as the first embodiment.

The tip of the cut is provided above the center in the vertical direction of the width of the tape-like high-density polyethylene at the end of the pouch (see the enlarged view in FIG. 4).

<Example 3>
FIG. 5 is a schematic plan view for explaining Example 3 of the standing pouch according to the present invention.

Below the upper end seal, tape-like high-density polyethylene is applied to the surface of the sealant layer of the front body and rear body laminates in the same direction as the upper end seal to connect the left and right ends. It is arranged and laminated along a planned line, and cuts are provided in the tape-shaped laminated body containing high-density polyethylene at both right and left ends. This is the same as the first embodiment.

The tip of the cut is provided below the vertical center of the width of the tape-like high-density polyethylene at the end of the pouch (see the enlarged view in FIG. 5).

<Comparative Example 1>
FIG. 6 is a schematic plan view for explaining Comparative Example 1 of the standing pouch according to the present invention.

Below the upper end seal, a tape-shaped high-density polyethylene is arranged and laminated in the same direction as the upper end seal on the surface of the sealant layer of the laminate of the front and rear trunks. , Separately, cuts are provided at both left and right ends.

The ends of the cuts are provided above the tape-like high-density polyethylene at both left and right ends of the pouch. Therefore, there is no scheduled opening line.
This part is different from the first to third embodiments.

<Comparative Example 2>
FIG. 7 is a schematic plan view for explaining Comparative Example 2 of the standing pouch according to the present invention.

Below the upper end seal portion, the tape-shaped high-density polyethylene is not provided on the surface of the sealant layer of the laminate of the front side body and the rear side body, and cuts are provided at both left and right ends. There is. Therefore, there is no scheduled opening line.
This part is different from the first to third embodiments.

The evaluation results are shown in FIG.

From the results shown in Table 1, in Examples 1 to 3, which are standing pouches with an opening shape retaining member according to the present invention, the opening property, the opening retention property, the ease of taking out the contents, and the cosmetic appearance of the opening In the evaluation results of the 4 items, and in the overall evaluation, all of them passed with evaluation of 4 points or 5 points.

On the other hand, in Comparative Examples 1 and 2, which partially deviate from the scope of the present invention, all of the evaluation results of the above four items and the overall evaluation are 3 points or less and fail.

As described above, according to the standing pouch with opening shape retaining member according to the present invention, in addition to the ease of opening the opening, the shape of the opening can be maintained, and the straightness of the cut end of the opening can be improved. It was verified that it is possible to provide an excellent standing pouch with an opening shape retaining member.

REFERENCE SIGNS LIST 1 front body 2 left and right end seals 3 bottom seal 4 top end seal 5 notch 6 bottom film 7 planned opening line 8 Back body 9 Tape-like high-density polyethylene 10 Folding line 11 Lower body 12 Upper body 13 Opening 100 Standing pouch

Claims (4)

In a standing pouch made of a laminate having a plastic film layer and a sealant layer,
The pouch consists of a front body, a back body, and a bottom film disposed therebetween, and a tape of high density polyethylene,
The tape-shaped high-density polyethylene is uniaxially stretched in the length direction, and has a shape-retaining function that can retain deformation such as bending and bending.
The front trunk portion and the rear trunk portion have four sides, and the sealant layers are arranged to face each other,
Of the four sides, both left and right ends are sealed, and both ends of the body are sealed,
a bottom film is folded and arranged and expandably sealed at the lower body portion between the front and rear body portions, and the lower pouch portion is sealed to form a bottom surface;
In the upper part of the body, the front side body part and the rear side body part are sealed by the upper end sealing part after filling the contents, and the whole pouch can be sealed,
Below the upper end seal portion, on the surface of the sealant layer of the front body portion, the rear body portion, or both of the laminates, the tape-like high density polyethylene is applied to the left and right in the same direction as the upper end seal portion. It is arranged and stacked as a planned opening line connecting both ends,
At least one of the left and right ends is provided with a notch in the tape-shaped laminate containing high-density polyethylene,
A standing pouch with an opening shape retaining member, wherein the tip of the cut is provided above the center in the vertical direction of the width of the tape-shaped high-density polyethylene at the end of the pouch. 2. The standing pouch with an opening shape retaining member according to claim 1 , wherein the tape-shaped high-density polyethylene is laminated on the sealant layer by heat welding. 3. The tape-shaped high-density polyethylene according to claim 1 or 2 , wherein a linear low-density polyethylene layer is laminated on either the surface or the back surface, or both surfaces thereof. A standing pouch with an opening shape retaining member. The standing pouch with an opening shape retaining member according to any one of claims 1 to 3 , wherein a gas barrier film layer having an inorganic compound deposited on the surface is included in the laminate constituting the standing pouch. .

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