JP2020075723A - Standing pouch having opening shape holding member - Google Patents

Abstract

To provide a standing pouch having an opening shape holding member easy in opening an opening, capable of holding the opening shape, and excellent in linearity of a cut area of the opening.SOLUTION: A standing pouch having an opening shape holding member comprises a front side body, a rear side body, a bottom film arranged therebetween, and tape-like high density polyethylene, which has a shape holding function capable of holding deformation of folding and curving. The tape-like high density polyethylene, at a lower part from an upper end seal part, is arranged and laminated in the same direction as the upper end seal part as an opening schedule line connecting the right and left ends, on the surface of the sealant layer of a laminate of the front side body, the rear side body, or both of them. At least at one end of the right and left ends, the laminate including the tape-like high density polyethylene has a notch.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pouch with a shape retaining member. In particular, a pouch with a bottom film that is self-supporting and has a form called a standing pouch that can maintain the shape of the opening when opening, and has excellent linearity of the cut end for opening. The present invention relates to a standing pouch with a member.

  Pouches, which are a type of packaging material, are widely used, consisting of a single body or a laminated body made of a plastic film as a base material, and various forms are used for a wide range of purposes. Has become an integral part of people's lives.

  For example, it is also used as a liquid container, is widely used in food fields such as beverages and retort foods, and in the field of daily necessities and toiletries, various products are bustling the product shelves of supermarkets, drug stores, and convenience stores. .. 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, and they can be handled with a fine material design depending on the required quality, or they are lightweight and space-saving even before filling the contents, distribution and storage. There is one thing. Also, pouches can be said to be environmentally adaptive from the perspective of reducing waste.

  In addition, high-definition printing on the layer visible from the surface can improve the image of the product and display necessary information about the contents. It is also the source of management and marketing information.

  Some of the pouches that have independence have been commercialized, and are generally called standing pouches. By making it self-reliant, it has become more convenient to take out the contents.

  Further, when opening the standing pouch after cooking, it is important to prevent burns due to jetting of residual steam, to facilitate opening of the opening, and to maintain the shape of the opening.

  Retaining the shape of the opening is, for example, when the contents are food, when the dish is directly taken out from the pouch with a tableware such as a spoon or a fork, and the food is directly eaten, the shape of the opening is not closed and the opened shape is maintained. Is desired to be maintained. At the same time, it is preferable that the opening cut is also linearly cut at a predetermined position.

  Patent Document 1 discloses a packaging bag capable of maintaining an unsealed shape by a planned opening line and a shape-maintaining member separately provided on the contents side of the planned opening line. Regarding the linearity of the planned opening line It was not always considered.

  In addition, since the material such as the plastic film of the pouch body or the laminated body surrounds the opening above the shape maintaining member as an opening, the shape of the opening is different from that of the shape maintaining member. There is a possibility that the plastic film or the laminate may have an irregular shape.

  For example, when using tableware such as a spoon or a fork to directly take out food from the pouch and eat it, it is difficult to take out the content, and the content easily sticks to the opening. However, it lacked beauty and could reduce the product value.

  Further, generally, in convenience stores and the like, many foods are stored in trays, plastic containers, standing pouches, or the like and provided to consumers. Of these, the trays and plastic containers had to be washed and discarded after the contents were gone. However, it was difficult to carry out at eat-in spaces of convenience stores and eating outdoors.

  In particular, among standing pouches, those with a general chuck are not suitable for eating directly from the pouch because the opening of the pouch is unstable and easily blocked, and it is not suitable for taking out contents and putting in and out of dishes. It was difficult.

JP, 2008-83640, A

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

As a means for solving the above problems, the invention according to claim 1 is
In a standing pouch made of a laminate having a plastic film layer and a sealant layer,
The pouch consists of a front torso, a back torso and a bottom film placed between them, 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 capable of retaining deformation such as bending and bending.
The front body and the back body have four sides, and the sealant layers are arranged to face each other,
Of the four sides, the left and right ends are sealed, and the body ends are sealed.
In the lower part of the body, between the front body and the rear body, a bottom film is folded and arranged, and is expandably sealed, and the lower part of the pouch is sealed so that a bottom surface can be formed.
In the upper part of the body part, the front body part and the rear body part are sealed by the upper end seal part after filling the contents, and the entire pouch can be sealed.
Below the upper end seal part, the tape-shaped high-density polyethylene is formed on the surface of the sealant layer of the front body part, the rear body part, or both laminated bodies in the same direction as the upper end seal part in the left and right directions. Arranged and laminated as a planned opening line that connects both ends,
A standing pouch with an opening shape-maintaining member, characterized in that at least one of the left and right ends is provided with a cut in the laminated body containing the tape-shaped high-density polyethylene.

Further, the invention according to claim 2 is
The standing pouch with an opening shape maintaining member according to claim 1, wherein the tip of the notch is provided above the center of the width of the tape-shaped high-density polyethylene at the end of the pouch in the vertical direction. Is.

The invention according to claim 3 is
The standing pouch with an opening shape maintaining member according to claim 1 or 2, wherein the tape-shaped high-density polyethylene is laminated on the sealant layer by heat welding.

Further, the invention according to claim 4 is
The tape-shaped high-density polyethylene is one in which a linear low-density polyethylene layer is laminated on either the front surface or the back surface, or both surfaces thereof, according to any one of claims 1 to 3. The standing pouch with the opening shape maintaining member described in 1.

Further, the invention according to claim 5 is
The standing pouch with an opening shape maintaining member according to any one of claims 1 to 4, wherein a gas barrier film layer having a surface on which an inorganic compound is vapor-deposited is included in a laminate constituting the standing pouch. Is.

  In a standing pouch, it is possible to provide a standing pouch with an opening shape-maintaining member, which is capable of maintaining the shape of the opening in addition to facilitating opening of the opening and having excellent linearity of a cut portion of the opening. It is possible.

  In particular, according to the invention described in claim 2, since the tip of the cut is provided above the center of the width of the tape-shaped high-density polyethylene at the end of the pouch in the vertical direction, the pouch body of the opened pouch is Since the tape-shaped high-density polyethylene remains wider at the end of the opening, the shape retention becomes more stable.

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

  That is, since the tape-shaped high-density polyethylene is arranged on the innermost layer of the pouch, that is, on the side in contact with the contents, the effect of adhesion by an adhesive or the like is a concern, but if it is heat welding, there is no effect other than polyethylene. It will not be, which is convenient.

  According to the invention described in claim 4, particularly, since the linear low-density polyethylene is laminated on the tape-shaped high-density polyethylene, heat sealing is possible, and the tape-shaped high-density polyethylene can be attached. It is also easy and convenient in terms of productivity. Further, by this welding, the tape-shaped high-density polyethylene can function as an opening line.

  Further, in particular, according to the invention described in claim 5, the content can be protected from the external environment, particularly the influence of oxygen by including the gas barrier film layer in which the inorganic compound is vapor-deposited on the surface in the laminate. ..

  For example, when the content is a food or a substance that is easily oxidized, it is effective in improving the preservability. In addition, compared with a gas barrier layer made of metal, it has transparency, the contents are visible from the outside of the pouch, and it is also suitable for applications such as high-frequency heating, making it suitable for inspection machines equipped with metal detectors. It is also possible to have suitability.

FIG. 1 is a schematic plan view for explaining an embodiment of a standing pouch according to the present invention. FIG. 2 is a perspective (partially see through) schematic diagram for explaining an opened state in one embodiment of the standing pouch according to the present invention. FIG. 3 is a schematic plan view for explaining the embodiment 1 of the standing pouch according to the present invention. FIG. 4 is a schematic plan view for explaining the second embodiment of the standing pouch according to the present invention. FIG. 5 is a schematic plan view for explaining the third embodiment 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 present 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 an embodiment of a standing pouch according to the present invention.

  The present invention provides a standing pouch (100) made of a laminate having a sealant layer in addition to a plastic film layer, which is capable of maintaining the shape of the opening in addition to the ease of opening the opening. A standing pouch (100) with an opening shape maintaining member, which is excellent in the linearity of the cut end of the opening.

  The pouch is made of a front body (1), a rear body (8), a bottom film (6) arranged between them, and a tape-shaped high-density polyethylene (9). 1) and the rear body part (8) have four sides and are arranged such that the sealant layers face each other, and are sealed by the left and right end seal parts (2) of the four sides, 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 capable of retaining deformation such as bending and bending. .. By this uniaxial stretching, polyethylene molecules have molecular orientation in the stretched direction.

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

  Thus, the bottom film (6) is expandably sealed at the lower part (11) of the standing pouch (100), so that the bottom film (6) forms a bottom surface when the contents are filled. The standing pouch (100) is self-supporting.

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

  Further, below the upper end seal part (4), a tape-shaped high-density polyethylene (9) is formed on the surface of the sealant layer of the laminate of the front body part (1) and / or the rear body part (8). Is arranged and adhered in the same direction as the upper end seal portion (4) as a planned opening line (7) connecting the left and right end seal portions (2).

  Further, in at least one of the left and right end seal portions (2), at least one end seal portion is provided with a cut (5) in the laminated body including the tape-shaped high-density polyethylene (9). With this notch (5) as a trigger, the opening line (7), that is, the tape-shaped high-density polyethylene (9) can be torn to open the standing pouch (100) with an opening shape retaining member.

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

  That is, since the tape-shaped high-density polyethylene (9) itself has a polymer orientation in the stretching direction and is easy to tear in this stretching direction, the tape-shaped high-density polyethylene is triggered by the notch (5). It is possible to cut the polyethylene (9) itself so that it coincides with the opening line (7) and open it.

  Since the tip of the cut (5) is provided in the laminated body containing the tape-shaped high-density polyethylene (9) at the end of the standing pouch (100), the planned opening line (7) is cut for opening. After the upper end seal part (4) is separated, the tape-shaped high-density polyethylene (9) is left by edging the end of the opening on the main body side of the standing pouch (100). Can be exhibited stably.

  Further, the tip of the notch (5) can be provided above the center of the width of the tape-shaped high-density polyethylene (9) at the left and right ends of the standing pouch (100) in the vertical direction. In this case, the 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), so that it can be opened by opening. After the planned line is cut and the upper end seal part (4) is separated, the tape-shaped high-density polyethylene (9) has more than half the width of the standing pouch (100) rim the end of the opening on the main body side. This is more convenient for stably exerting the shape retaining function.

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

  The opening is triggered by the cuts in the side end seals, and the planned opening line (7) that connects the left and right end seals (2) is torn apart to separate the upper part of the body (12) in the direction of the arrow in the figure. Done. At this time, the polyethylene molecules of the tape-shaped high-density polyethylene (9) are stretched in the lengthwise direction and have an orientation, so that they can be easily torn along the planned opening line (7).

  Therefore, since the opening line (7) is included in the width of the tape-shaped high-density polyethylene (9), when the standing pouch (100) with an opening shape maintaining member is opened, The opening (13) can be in a state in which a tape-shaped high-density polyethylene (9) covers the end so as to surround the end.

  Further, the tape-shaped high-density polyethylene (9) used in the standing pouch (100) with an opening shape maintaining member according to the present invention is uniaxially stretched in the length direction, and is deformed by bending or bending. Has a shape retention function.

  That is, the end of the opening (13) of the main body of the standing pouch (100) with an opening shape maintaining member is in a state of being covered so as to be surrounded by the tape-shaped high-density polyethylene (9), and the tape-shaped. The high-density polyethylene (9) is uniaxially stretched in the length direction and can hold deformation such as bending and bending, so that the shape of the opening (13) is held more stably. It

  As described above, in the standing pouch (100) with an opening shape maintaining 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 can be maintained. It is possible to provide the standing pouch (100) with an opening shape maintaining member, which has excellent linearity of the cut end of the portion (13).

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

  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, adhesion by an adhesive or the like is likely to have an influence on it, but if it is heat welding, polyethylene other than polyethylene is used. There is no influence of, and it is convenient.

  Further, in the standing pouch (100) with an opening shape maintaining member according to the present invention, the tape-shaped high-density polyethylene (9) has a linear low-density polyethylene layer laminated on either or both sides thereof. can do.

  That is, since the linear low-density polyethylene is laminated on the tape-shaped high-density polyethylene (9), it can be heat-sealed, and the tape-shaped high-density polyethylene can be easily attached and the productivity is improved. But it's convenient. Further, by this welding, the tape-shaped high-density polyethylene (9) can function as a planned opening line.

  Further, in the standing pouch (100) with an opening shape maintaining member according to the present invention, the laminated body forming the standing pouch (100) may include a gas barrier film layer having an inorganic compound deposited on the surface thereof.

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

  For example, when the content is a food or a substance that is easily oxidized, it is effective in improving the preservability. In addition, compared with a gas barrier layer made of metal, it has transparency, the contents are visible from the outside of the pouch, and it is also suitable for applications such as high-frequency heating, making it suitable for inspection machines equipped with metal detectors. It is also possible to have suitability.

Thus, according to the present invention, in the standing pouch (100), the opening (13
), The opening pouch (100) is capable of holding the shape of the opening (13) and is excellent in the linearity of the cut end of the opening (13). It is possible to provide.

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

<Tape-shaped high-density polyethylene>
By highly uniaxially stretching high density polyethylene (HDPE), it is possible to make a sheet in which molecules are uniaxially aligned. This is a polyethylene with shape retaining function, which is sold as a product by a material manufacturer.

  As a property of polyethylene with a shape-retaining function, it has the property of being able to freely change its shape like a wire when an external force is applied, and it retains its shape after deformation, with almost no bending back. Further, this property can be repeatedly used, and can be punched and laminated. Further, since it is a polyethylene material, it is lightweight, can be recycled or incinerated, and is an environmentally adaptable material.

  Unlike wire and the like, polyethylene with a shape-retaining function does not rust, and is easy to recycle because it is a polyolefin. In some cases, even if it is incinerated, toxic gas is not generated.

  In the present invention, by arranging at the end of the opening of the pouch and at the innermost layer of the pouch, when the pouch is opened, the shape of the pouch is maintained while the opening is open, so that the contents can be taken out easily. Have convenience.

  On the contrary, in the case of a general pouch that is not the standing pouch with the opening shape maintaining member, the opening may be closed due to the rigidity or elasticity of the laminated body, which may cause difficulty in terms of usability.

  Even if a member having a shape-retaining function is used, it is difficult to cover the end of the opening as in the present invention, and the end of the opening has a plastic film or a laminate thereof. As a result, the shape may be unstable or irregular.

<Plastic film layer>
In the present invention, a plastic film is used not only as the outermost plastic film layer, but also as an intermediate film layer, a sealant layer, etc., in the laminate forming the standing pouch (100) with an opening shape maintaining member. When a gas barrier film layer is provided, a plastic film is used as the base film.

  The plastic film is a film made of a polymer resin composition and includes, for example, 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.

Particularly, when polypropylene or polyethylene terephthalate is used as the plastic film, it is more preferable in terms of film strength and cost. In addition, when a stretched polyamide film is used, it is possible to impart puncture toughness and impact toughness to the laminate.

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

<Gas barrier film>
Further, a gas barrier layer made of an inorganic compound may be provided in the laminate forming the pouch, for the purpose of improving the storability of the contents. For example, a gas barrier film in which a gas barrier layer is provided on the surface of a plastic film can be used.

  Although a metal foil such as aluminum is also effective as a gas barrier layer, it is not suitable for cooking in a microwave oven because sparks due to high frequency are generated.

  In the case of a gas barrier film, the plastic film used is a film made of a polymer resin composition, for example, polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide. (Nylon-6, nylon-66, etc.), polyimide and the like 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 more 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 and a coating layer of an inorganic compound. After providing an anchor coat on a plastic film, the vapor deposition layer and the coating layer are sequentially provided.

  For the anchor coat layer of the gas barrier film, urethane acrylate can be used, for example. To form the anchor coat layer, a coating method in which a coating material obtained by dissolving a resin in a solvent is applied by a printing method such as gravure coating, or a coating method can be formed by using a generally known coating method.

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

  As a method for forming the coating layer, an aqueous solution or water / alcohol containing at least one of a water-soluble polymer and (a) one or more alkoxides or hydrolysates thereof, or both (b) tin chloride. A coating agent having a mixed aqueous solution as a main component is applied on a film and dried by heating to form an inorganic compound layer by a coating method to form a coating layer. At this time, by adding a silane monomer to the coating agent, the adhesion with the anchor coat layer can be improved.

  The inorganic compound layer has a gas barrier property only by a coating film formed by a vacuum vapor deposition method, but a coating layer that is an inorganic compound layer formed by a coating method is formed on a vapor deposition layer that is an inorganic compound layer formed by a vacuum vapor deposition method to form a gas barrier layer. be able to.

By combining these two layers, both reaction layers are formed at the interface between the inorganic compound layer formed by vacuum deposition and the inorganic compound layer formed by coating, or the inorganic compound layer formed by coating becomes an inorganic compound layer formed by vacuum deposition. A dense structure is formed by filling and reinforcing defects or fine holes such as pinholes, cracks, and grain boundaries that occur.

  Therefore, as a gas barrier film, higher gas barrier properties, moisture resistance, and water resistance can be realized, and since the gas barrier film has flexibility to withstand deformation by external force, it can be suitable as a packaging material.

  Further, when SiO, for example, 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 the required quality.

<Sealant layer>
The sealant layer makes it possible to stack two laminated bodies so that the sealant layers face each other, and heat and pressurize them to heat-seal them to bond them to each other to form a pouch into a bag.

  As a material for the sealant layer, a polyolefin resin is generally used among thermoplastic resins, and 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, and other ethylene-based resins, blended resins of polyethylene and polybutene, and homopolypropylene resins. Polypropylene resins such as (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, propylene-α-olefin copolymer and the like can be used.

  For formation of the sealant layer, a molten resin can be formed into a film 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 a film in advance by laminating.

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

  The print layer may be provided on a part of the pouch or may be provided on the entire surface of the pouch. Alternatively, as a method of providing the display unit without using the printing layer, for example, a printed sticker can be attached to the surface of the pouch.

  Here, the printing method and the printing ink are not particularly limited, but known printing methods, printability of the printing ink to the plastic film, designability such as coloring and color tone, adhesiveness, use Depending on the safety of the food container and the like, it may be appropriately selected depending on the case.

  For example, a known printing method such as a gravure printing method, an offset printing method, a gravure offset printing method, a flexographic printing method, a silk screen printing method, and an inkjet printing method can be selected and used. Among them, the gravure printing method can be preferably used in terms of productivity, printability on a plastic film, and high definition of a pattern.

  As described above, 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 opening (13) can be maintained. It is possible to provide a standing pouch (100) with an opening shape maintaining member, which is excellent in the linearity of the cut end.

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

  Samples for evaluation of standing pouches were prepared as Examples 1 to 3 according to the present invention and Comparative Examples 1 and 2 for comparison, and the contents were put therein, sealed, and opened to take out the contents. Evaluated.

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

That is, the evaluation sample, in the opened and opened state,
・ Upper side is 150 mm
・ The lower side is 130 mm
・ Height is 155 mm
-The length from the bottom side to the notch is 100 mm
Is.
In addition, this dimension is common to all the samples of Examples 1 to 3 and Comparative Examples 1 and 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-shaped 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 samples for evaluation of the examples and comparative examples of the standing pouch with the opening shape maintaining member are as follows.
-Contents: hamburger.

The evaluation items of the examples for the standing pouch with the opening shape maintaining member and the evaluation sample of the comparative example are the following four items.
・ Openability, opening retention, easy removal of contents from tableware, and cosmetics of the opening.

The evaluation methods of the examples of the standing pouch with the opening shape maintaining member and the evaluation sample of the comparative example are as follows.
-Comparative sensory evaluation was performed at 1 to 5 points.
・ There were 5 panelists.
The 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 the opening shape maintaining member is as follows.
-Comprehensive judgment was made based on the average score of four evaluation items.
・ A score of 4 or more was accepted, and a score of less than 4 was rejected.

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

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

  The tip of the notch 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 the second embodiment of the standing pouch according to the present invention.

  Below the upper end seal, a tape-shaped high-density polyethylene is formed on the surface of the sealant layer of the laminated body of the front body and the rear body to connect the left and right ends in the same direction as the upper seal. They are arranged and laminated as expected lines, and cuts are provided in the tape-shaped laminate containing high-density polyethylene at both left and right ends. This is the same as in the first embodiment.

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

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

  On the surface of the sealant layer of the laminated body of the front body and the rear body below the upper end seal, tape-shaped high-density polyethylene is used to open and close the left and right ends in the same direction as the upper end seal. They are arranged and laminated as expected lines, and cuts are provided in the tape-shaped laminate containing high-density polyethylene at both left and right ends. This is the same as in the first embodiment.

  The tip of the cut is provided below the center of the width of the tape-shaped high-density polyethylene at the end of the pouch in the vertical direction (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 part, tape-shaped high-density polyethylene is arranged and laminated in the same direction as the upper end seal part on the surface of the sealant layer of the laminated body of the front body part and the rear body part. Separately, notches are provided at both left and right ends.

The tip of the notch is provided above the tape-shaped 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 laminated body of the front body portion and the rear body portion, and notches are provided at both left and right end portions. There is. Therefore, there is no scheduled opening line.
This part is different from the first to third embodiments.

  The evaluation result is shown in FIG.

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

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

  As described above, according to the standing pouch with the opening shape maintaining 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 cut end of the opening can be straightened. It was possible to verify that it is possible to provide an excellent standing pouch with an opening shape maintaining member.

1 ... Front body 2 ... Left and right end seals 3 ... Bottom seal 4 ... Top seal 5 ... Notch 6 ... Bottom film 7 ... Scheduled opening line 8 Rear body 9 Tape high density polyethylene 10 Fold line 11 Lower body 12 Upper body 13 Opening 100 Standing pouch

Claims (5)

In a standing pouch made of a laminate having a plastic film layer and a sealant layer,
The pouch consists of a front torso, a back torso and a bottom film placed between them, 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 capable of retaining deformation such as bending and bending.
The front body and the back body have four sides, and the sealant layers are arranged to face each other,
Of the four sides, the left and right ends are sealed, and the body ends are sealed.
In the lower part of the body, between the front body and the rear body, a bottom film is folded and arranged, and is expandably sealed, and the lower part of the pouch is sealed so that a bottom surface can be formed.
In the upper part of the body part, the front body part and the rear body part are sealed by the upper end seal part after filling the contents, and the entire pouch can be sealed.
Below the upper end seal part, the tape-shaped high-density polyethylene is formed on the surface of the sealant layer of the front body part, the rear body part, or both laminated bodies in the same direction as the upper end seal part in the left and right directions. Arranged and laminated as a planned opening line that connects both ends,
A standing pouch with an opening shape-maintaining member, characterized in that at least one of the left and right ends is provided with a cut in the laminated body containing the tape-shaped high-density polyethylene.   The standing pouch with an opening shape maintaining member according to claim 1, wherein the tip of the notch is provided above the center of the width of the tape-shaped high-density polyethylene at the end of the pouch in the vertical direction. .   The standing pouch with an opening shape maintaining member according to claim 1 or 2, wherein the tape-shaped high-density polyethylene is laminated on the sealant layer by heat.   The tape-shaped high-density polyethylene is one in which a linear low-density polyethylene layer is laminated on either the front surface or the back surface, or both surfaces thereof, according to any one of claims 1 to 3. A standing pouch with an opening shape maintaining member as described in 1.   The standing pouch with an opening shape maintaining member according to any one of claims 1 to 4, wherein a gas barrier film layer having a surface on which an inorganic compound is vapor-deposited is included in a laminate constituting the standing pouch. .

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