JP2020200047A - Standing pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-supporting pouch capable of cooking contents by a microwave oven, provided with an automatic steam venting mechanism capable of discharging steam generated from the contents by cooking to the outside, and upon opening. An object of the present invention is to provide a standing pouch that is easy to open, has excellent straightness of the cut end, and can maintain the opening shape of the opening. SOLUTION: The pouch is made of a laminated body of plastic films and can be cooked by heating in a microwave oven. The plastic film layer on the outermost layer side of the laminated body uses a polyethylene terephthalate film, and is an intermediate film of the laminated body. The layer is a layer adjacent to the sealant layer and uses a polyethylene terephthalate film having a linear cut property in the horizontal direction of the pouch body, and the sealant layer on the innermost layer side of the laminate is in the horizontal direction of the pouch body. A standing pouch characterized by being a polypropylene resin layer having a linear cut property. [Selection diagram] Fig. 1

Description

The present invention relates to a pouch suitable for cooking in a microwave oven. In particular, it is a pouch in the form of a standing pouch that has a bottom plate and is self-supporting, and is equipped with an automatic steam venting mechanism that can discharge steam generated from the contents during cooking to the outside, and is opened. The present invention relates to a standing pouch that is easy to open, has excellent straightness of the cut end, and can maintain the opening shape of the opening.

Pouches, which are a type of packaging material, are widely used as single or laminated bodies based on a plastic film, and various forms are used for a wide range of purposes in people's lives. It has become indispensable for.

Pouches are also used as liquid containers, for example, and are widely used in the food field such as retort pouch foods as well as beverages. In the field of daily necessities and toiletries, various products can be used as shelves in supermarkets, drug stores, and convenience stores. It's busy. 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 handled with detailed material design depending on the required quality, or that they are lightweight and space-saving before filling the contents and in distribution and storage. Can be mentioned. The pouch can also be said to be environmentally adaptable from the perspective of reducing waste.

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

Some pouches that have self-reliance have been commercialized and are generally called standing pouches. In addition to having advantages in displaying and displaying products, it also has advantages in usability by giving it independence. For example, it has been further convenient for taking out contents.

Furthermore, when opening the standing pouch after cooking, it is important to prevent burns due to residual steam, to easily open the opening, and to maintain the shape of the opening.

When the contents are food, for example, when the contents are taken out directly from the pouch using tableware such as a spoon or fork and eaten, the opening is kept open without closing. It is desirable to lean. At the same time, it is preferable that the cut end of the opening is also cut in a straight line at a predetermined position.

Patent Document 1 proposes a standing pouch that has independence in a state of being filled with contents, but the emphasis is only on independence and filling property, and the opening property, steamability, or opening. The shape retention function, the shape and linearity of the cut end were not considered.

Japanese Unexamined Patent Publication No. 2006-96388

The present invention has been made in view of such a situation, and in a self-supporting pouch capable of cooking the contents in a microwave oven, the steam generated from the contents by the cooking is discharged to the outside. It is an object of the present invention to provide a standing pouch which is provided with an automatic steam venting mechanism capable of providing an automatic steam venting mechanism, is easy to open when opened, has excellent straightness of the cut end, and can maintain the opening shape of the opening.

The invention according to claim 1 is a means for solving the above problems.
A pouch made of a laminate of plastic films that can be cooked in a microwave oven.
The laminate is composed of a plastic film layer on the outermost layer side of the pouch, an intermediate film layer, and a sealant layer on the innermost layer side of the pouch.
The pouch is bagged to accommodate the contents by the front torso, the back torso, and the bottom film placed between them.
The pouch is equipped with an automatic steam removal mechanism that can discharge the steam generated from the contents to the outside of the pouch during cooking in a microwave oven.
The front body portion and the rear side body portion have four sides and are arranged so that the sealant layers face each other.
Of these four sides, the left and right ends of the body are sealed, and both ends of the pouch are sealed.
At the bottom of the torso, the bottom film is folded and placed between the front torso and the back torso, and the lower end of the pouch is sealed and sealed with the torso so that the bottom film can form the bottom. And
In the upper part of the torso, the front torso and the back torso are sealed at the upper end of the pouch after accommodating the contents, and the entire pouch can be sealed.
Notches are provided on at least one of the seals at both ends of the body, and the horizontal straight line on the front and back of the pouch is the planned opening line, starting from this notch.
A polyethylene terephthalate film is used for the plastic film layer on the outermost layer side of the laminate.
The intermediate film layer of the laminated body is a layer adjacent to the sealant layer, and uses a polyethylene terephthalate film having a linear cut property in the horizontal direction of the pouch body.
The sealant layer on the innermost layer side of the laminated body is a standing pouch characterized by being a polypropylene resin layer having a linear cut property in the horizontal direction of the pouch body.

Further, the invention according to claim 2 is
Claim 1 is characterized in that the cut is provided at a position between the height of the surface of the contents and the seal portion at the upper end of the pouch in a state where the pouch is self-supporting after the contents are stored. It is a standing pouch described in.

The invention according to claim 3 is
The standing pouch according to claim 1 or 2, wherein the sealant layer is laminated with a polypropylene resin film having a linear cut property in the horizontal direction of the pouch body.

Further, the invention according to claim 4 is
The automatic steam bleeding mechanism is characterized in that, in cooking with a microwave oven, a part of the seal portion of the pouch is peeled off and steamed due to the generation of steam from the contents, according to claims 1 to 3. The standing pouch described in either.

Further, the invention according to claim 5 is
The standing pouch according to any one of claims 1 to 4, wherein the polyethylene terephthalate film of the plastic film layer of the laminated body is provided with an inorganic compound vapor deposition film on the surface thereof.

Further, the invention according to claim 6 is
The standing pouch according to any one of claims 1 to 5, wherein the intermediate film layer of the laminated body further contains a polyamide film having a linear cut property in the horizontal direction of the pouch body. ..

Further, the invention according to claim 7 is
Any one of claims 1 to 6, wherein the polyethylene terephthalate film of the intermediate film layer of the laminated body is provided with a scratched line along the planned opening line of the pouch body. It is a standing pouch described in.

Further, the invention according to claim 8 is
The standing pouch according to any one of claims 1 to 7, wherein the scratched line is provided with a perforated line or a half-cut line.

Further, the invention according to claim 9 is
The standing pouch according to claim 8, wherein the scratched line is provided with a perforated line or a half-cut line.

According to the present invention, a self-supporting pouch capable of cooking the contents in a microwave oven is provided with an automatic steam venting mechanism capable of discharging steam generated from the contents by cooking to the outside. It is possible to provide a standing pouch that is easy to open, has excellent straightness of the cut end, and can maintain the opening shape of the opening opening.

The point that it is a standing pouch with independence is that it can be independent because the bottom film is sealed so that the bottom surface can be formed and the pouch is formed in the lower part, and it can be opened without losing its independence even after cooking. It has the convenience of taking out the contents.

In addition, by having an automatic steam removal mechanism, it is possible to eliminate problems such as the internal pressure inside the pouch rising due to the steam generated from the contents during cooking, leading to bag breakage, and steam spouting when the bag is opened. is there.

Notches are provided in at least one of the seals at both ends of the torso, and the opening is started by the horizontal straight line of the torso on the front and back of the pouch starting from this notch. The work can be done more easily.

Further, the intermediate film layer of the laminate is a layer adjacent to the sealant layer, and a polyethylene terephthalate film having a linear cut property in the horizontal direction of the pouch body is used, and the sealant layer on the innermost layer side of the laminate is A standing pouch that is easy to open when opened, has excellent straightness of the cut end, and can maintain the opening shape of the opening because it is a polypropylene resin layer that has a linear cut property in the horizontal direction of the pouch body. Can be realized.

Further, in particular, according to the invention of claim 2, the notch is made at a position between the height of the surface of the contents and the seal portion at the upper end of the pouch in a state where the pouch is self-supporting after the contents are stored. By providing the pouch, when the pouch is torn and opened starting from the notch, the contents can be torn more smoothly without causing a problem such as spilling out of the pouch.

Further, since it is possible to take out the contents from the opening while maintaining the shape of the opening, it is possible to make it easier by using tableware such as chopsticks and spoons, for example. ..

Further, in particular, according to the invention of claim 3, the sealant layer is preliminarily imparted with linear cutability by laminating a polypropylene resin film having linear cutability in the horizontal direction of the pouch body. Since the layer can be formed using a film, it is possible to provide a more stable and production-efficient laminate, that is, a standing pouch.

Further, in particular, according to the invention of claim 4, the automatic steam bleeding mechanism is a mechanism in which a part of the seal portion of the pouch is peeled off and steamed due to the generation of steam from the contents in cooking by a microwave oven. By adopting, it is possible to realize by a method such as bending or bending a part of the seal shape of the pouch, or a method within the range of the conventional manufacturing process such as partially weakening the seal strength. There is no need for a separate member, and there is no risk of significantly reducing costs.

Further, in particular, according to the invention of claim 5, the polyethylene terephthalate film of the plastic film layer of the laminated body is provided with the inorganic compound vapor deposition film on the surface thereof, so that the gas barrier performance is imparted. It is possible to improve the storage stability of the contents and eliminate the influence of the storage environment on the contents.

In particular, when an inorganic compound vapor deposition film is provided on the surface of a polyethylene terephthalate film as a gas barrier film, the gas barrier layer made of a metal foil such as an aluminum foil is superior to the case where it is not suitable for cooking in a microwave oven. There is.

In addition, the inorganic compound vapor deposited coating, for example in the case of using such AlO _X, in order to have a transparency, it is possible to visible the contents from the pouch exterior.

Further, in particular, according to the invention of claim 6, since the polyethylene terephthalate film of the plastic film layer of the laminated body is a medium-sized polyethylene terephthalate film, a stretch-balanced portion is selectively used. Therefore, it is effective in achieving a more stable linear cut property even when the package is opened by tearing.

Further, in particular, according to the invention of claim 7, the intermediate film layer of the laminated body further contains a polyamide film having a linear cut property in the horizontal direction of the pouch body, thereby affecting the tearability. It can be a standing pouch with excellent mechanical strength.

Further, in particular, according to the invention of claim 8, the polyethylene terephthalate film of the intermediate film layer of the laminated body is provided with a scratched line along the planned opening line of the pouch body. Since it works as a mechanism to assist the linear cut property, it is effective in realizing easier and more stable linearity even when the package is opened by tearing.

Further, in particular, according to the invention of claim 9, since the scratched line is provided with a perforation or a half-cut line, it works as a mechanism for assisting the linear cut property, and therefore, it is opened by tearing. However, it is more effective in achieving more stable linearity.

FIG. 1 is a plan (partially perspective) schematic view for explaining an embodiment of a standing pouch according to the present invention. FIG. 2 is a perspective (partially perspective) schematic view for explaining an opened state in one embodiment of a standing pouch according to the present invention. FIG. 3 is a schematic plan view showing an external shape and dimensions for explaining an example of a standing pouch according to the present invention and a comparative example. FIG. 4 is a schematic partial cross-sectional view of a laminate constituting the pouch for explaining Example 1 of the standing pouch according to the present invention. FIG. 5 is a schematic partial cross-sectional view of a laminate constituting the pouch for explaining Example 2 of the standing pouch according to the present invention. FIG. 6 is a schematic partial cross-sectional view of a laminate constituting the pouch for explaining Example 3 of the standing pouch according to the present invention. FIG. 7 is a schematic partial cross-sectional view of a laminate constituting the pouch for explaining Example 4 of the standing pouch according to the present invention. FIG. 8 is a schematic partial cross-sectional view of a laminated body constituting the pouch for explaining Comparative Example 1 of the standing pouch according to the present invention. FIG. 9 is a schematic partial cross-sectional view of a laminate constituting the pouch 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 FIGS. 1 to 9. However, the present invention is not limited to the examples shown here. The present invention is limited by the claims.

FIG. 1 is a plan (partially perspective) schematic view for explaining an embodiment of a standing pouch according to the present invention.

The present invention is a standing pouch (100) made of a laminate using a plastic film, and the laminate is composed of a plastic film layer on the outermost layer side of the pouch, an intermediate film layer, and a sealant layer on the innermost layer side of the pouch. It is composed.

The sealant layer allows the two laminates to be stacked so that the sealant layers face each other and sealed to adhere to each other to form a bag in a pouch. As the seal, for example, a heat seal by heating or pressurizing can be used.

As the material of the sealant layer, a polyolefin-based resin among the thermoplastic resins can be used. Further, in order to form the sealant layer, a molten resin can be formed by using an extruder or the like to form a layer on the laminated body. Alternatively, it is also possible to form a sealant layer on the surface of the laminated body by laminating a material that has been formed into a film in advance by laminating.

As shown in FIG. 1, the standing pouch (100) is capable of accommodating the contents by the front body (1), the rear body (7), and the bottom film (10) arranged between them. It is made into a bag.

That is, the front body portion (1) and the rear body portion (7) have four sides and are arranged so that the sealant layers face each other. Of these four sides, the left and right ends of the body portion ( 2) is sealed, and the left and right ends (2) of the pouch are sealed.

Further, in the lower part of the body portion, the bottom film (10) is folded and arranged along the folding line (6) between the front side body portion (1) and the rear side body portion (7), and the lower end portion (3) of the pouch is arranged. ) Is sealed and sealed so that the bottom surface can be formed by the bottom film (10).

By forming this bottom surface, the standing pouch (100) containing the contents can be self-supporting. Independence makes it more convenient, for example, for display as a product, display, and cooking in a microwave oven.

Further, in the upper part of the body part, the front side body part (1) and the rear side body part (7) are sealed by the upper end portion (4) of the pouch after accommodating the contents, and the entire standing pouch (100) is sealed. Is possible.

Further, the standing pouch (100) according to the present invention is provided with an automatic steam bleeding mechanism (12) capable of discharging steam generated from the contents to the outside of the pouch when the contents are cooked by a microwave oven.

This automatic steam bleeding mechanism (12) is effective in preventing the pouch body from breaking at once due to an increase in internal pressure due to steam generated inside the pouch in cooking with a microwave oven, and after cooking. Even when opening the pouch, it is effective in preventing the risk of water vapor spouting from the inside and causing burns to the fingers.

In the example shown in FIG. 1, the automatic steam bleeding mechanism (12) is an example provided near the upper end portion (4) on the right side side thereof. In the present invention, the position where the automatic steam venting mechanism (12) is provided is not limited, but it is an object of the present invention to derive steam generated from the contents in microwave cooking to the outside of the pouch. A portion facing the space inside the pouch, which is above the surface of the contents during cooking and is not in direct contact with the contents, is suitable.

That is, in the example shown in FIG. 1, when cooking in a microwave oven, the space inside the pouch of the standing pouch (100) is filled with steam from the contents by heating, and the standing pouch is further expanded by the volume expansion of the contents accommodating space. (100) The whole swells, and at the same time, the internal pressure rises.

At this time, the volume expansion occurs three-dimensionally radially from the volume center of the space inside the pouch of the standing pouch (100), and the volume expansion causes the automatic steam removal mechanism (12) in the example shown in FIG. In the case of, pressure is applied to the bent seal portion, and it acts as a peeling force on the front and back laminated bodies of this portion with respect to the bent seal portion.

For example, in the example shown in FIG. 1, the peripheral portion of the pouch is sealed, and even if volume expansion occurs due to water vapor, the substantially rectangular shape shown in FIG. 1 is expanded three-dimensionally while the internal pressure is low. It is possible to transform it into a rectangular shape.

However, this radial three-dimensional volume expansion tends to expand spherically as the internal pressure further increases, resulting in a discrepancy with the room for expansion of the substantially rectangular pouch.

In the example shown in FIG. 1, at this time, since the automatic steam venting mechanism (12) has a shape bent toward the inside of the packaging bag (100), it is shown in FIG. 1 due to three-dimensional radial volume expansion. In the example shown, since the pressure to be peeled off is stronger than that of the seal portion on the peripheral portion, the stress concentration becomes more intense in this portion, and the seal portion of the automatic steam venting mechanism (12) peels off. Will wake you up.

By this peeling, the internal space of the pouch and the outside are connected, and the water vapor inside is automatically derived to the outside. Therefore, since this portion serves as an automatic steam bleeding mechanism, the internal pressure of the standing pouch (100) is sharply reduced, so that such peeling does not occur in the seal portion of the other peripheral portion.

Further, the automatic steam bleeding mechanism is not limited to the example shown here, and the inside and outside of the pouch are automatically connected by the partial destruction of the seal portion by the internal pressure of the pouch increased by the generation of steam. As long as the function of deriving water vapor to the outside satisfies this, other methods may be used.

To give an example of another method, for example, it is possible to have a structure in which the seal strength is weak, the seal width is narrower, or both are sealed in the part of the automatic steam venting mechanism as compared with the seal part in the peripheral portion. Is.

For example, if the seal strength is weaker than other seal parts, you can select the type of sealant, adjust the seal conditions, or insert a layer effective for weakening in this part during sealing. It can be realized by.

Further, the seal width is narrower than that of other seal portions, and the sealed state can be a fragile portion. In this case, it can be realized by adjusting the shape and width of the seal bar.

Further, in the present invention, a notch (8) is provided in at least one of the seal portions of the left and right end portions (2) of the body portion, and the front side body portion (1) of the pouch starts from this notch (8). ), The planned opening line (5) can be provided as a straight line in the horizontal direction.

Starting from this notch (8), the horizontal straight line of the front body (1) of the pouch is the planned opening line (5), and the same applies to the rear body (7). The opening operation and the subsequent opening operation can be performed more easily. Further, even at the opening after opening, the cut does not cause tearing or the like, and a horizontal cut can be maintained.

In the example shown in FIG. 1, one notch (8) is provided at the side end on the left side, and the body of the front and back of the pouch starts from this notch (8) in the horizontal direction. The straight line of is indicated by a broken line as the planned opening line (5). However, the planned opening line of the rear body portion overlaps with the planned opening line of the front side body portion, and is invisible in FIG.

The shape of the notch (8) can be a V-shaped notch (8) as in the example shown in FIG. 1, or it may be simply a linear notch.

Further, in the standing pouch (100) according to the present invention, a polyethylene terephthalate film is used as the plastic film layer on the outermost layer side of the laminate, and the intermediate film layer of the laminate is a layer adjacent to the sealant layer. , A polyethylene terephthalate film having a linear cut property in the horizontal direction of the pouch body is used, and the sealant layer on the innermost layer side of the laminate is a polypropylene resin layer having a linear cut property in the horizontal direction of the pouch body. It is characterized by.

As a result of diligent studies in the process of promoting the present invention, these material configurations make it easy to open the opening, have excellent straightness of the cut end, and can maintain the opening shape of the opening opening. He found that the standing pouch (100) could be realized.

In this way, according to the present invention, in a self-supporting pouch that can cook the contents in a microwave oven, the steam generated from the contents by the cooking can be discharged to the outside automatically. It is possible to provide a standing pouch (100) provided with a steam venting mechanism, which is easy to open when opened, has excellent straightness of the cut end, and can maintain the opening shape of the opening.

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

The standing pouch (100) according to the present invention is suitable for microwave cooking, and in a state where the contents are contained, the bottom film (10) is between the sealed bottom ends (3). Expands to form the bottom of the pouch, allowing the pouch to remain stable and self-supporting.

In addition, after cooking, the planned opening line (5) on the front side body and the planned opening line (11) on the back side body are cut and opened starting from the notch (8) with fingers, and the upper part of the pouch is opened. (90) can be separated and separated.

The opening (20) thus formed is a portion surrounded by the planned opening line (5) on the front body and the planned opening line (11) on the rear body, and is the opening (20) in the open state. The shape of is maintained.

First, the scheduled opening line (5) of the front body and the scheduled opening line (11) of the rear body are straight cuts in the horizontal direction, which is the outermost layer of the pouch laminate according to the present invention. A polyethylene terephthalate film is used as the plastic film layer on the side, and a polyethylene terephthalate film which is a layer adjacent to the sealant layer and has a linear cut property in the horizontal direction of the pouch body is used as the intermediate film layer of the laminate. This is because the sealant layer on the innermost layer side of the pouch is a polypropylene resin layer having a linear cut property in the horizontal direction of the pouch body.

Further, as can be seen from the opened state of the pouch shown in FIG. 2, the opening (20) is in a wide open state, and this state is a standing pouch in which the internal pressure once rises and swells during cooking with a microwave oven. The bulging shape of the space inside the pouch of (100) remains.

That is, the surplus portion of the storage space of the contents (14), which had a relatively small volume before cooking, expands due to the generation of steam, and even after the steam is removed by the automatic steam removal mechanism (12). This is the result of opening the opening (20) in an open state because the opening operation is performed while maintaining a certain volume.

If the content (14) is liquid or fluid, the content (14) can gather at the bottom of the pouch and the bottom film can form a flat bottom, which weight opens the pouch. The part (20) can be expanded to form an independent state, and can maintain an independent state in a stable state even in microwave oven cooking and after opening.

As a result of the opening (20) being kept wide open, the contents (14) of the standing pouch (100) according to the present invention can be easily taken out, for example, chopsticks in the case of food. , Spoon, or fork, etc., can be taken out and eaten directly, which is very convenient.

Further, in the present invention, the notch (8) can be provided at a position between the height of the surface of the contents and the seal portion at the upper end of the pouch in a state where the pouch is self-supporting after the contents are stored. In this case, the opening operation with the fingers starting from the notch (8) can be started more easily and stably.

Further, the tearing of the planned opening line (5) on the front side body and the planned opening line (11) on the rear side body, which is continuous with the notch (8), is also the same, and the planned opening line (5) on the front side body is also the same. And, it is possible to perform the opening operation in the horizontal direction more easily and stably by the planned opening line (11) of the rear body portion.

This is because, in the present invention, the plastic film layer on the outermost layer side of the laminate constituting the pouch uses a polyethylene terephthalate film, and the intermediate film layer of the laminate is a layer adjacent to the sealant layer and is a pouch. A polyethylene terephthalate film having a linear cut property in the horizontal direction of the body is used, and the sealant layer on the innermost layer side of the pouch of the laminate is a polypropylene resin layer having a linear cut property in the horizontal direction of the pouch body. It is a thing.

Further, in the present invention, the sealant layer may be a laminate of a polypropylene resin film having a linear cut property in the horizontal direction of the pouch body. By using a material that has been formed into a film in advance, it is possible to laminate the sealant layer, that is, to manufacture the laminate more easily and stably.

Further, in the present invention, the automatic steam bleeding mechanism does not impose any particular limitation on the method, but for example, in cooking with a microwave oven, the internal pressure rises due to the generation of steam from the contents to seal the pouch. It is also possible to take a method in which a part of the steam is peeled off and steamed.

In this case, it can be realized by a method such as bending or bending a part of the seal shape of the pouch, or a method within the range of the conventional manufacturing process such as partially weakening the seal strength. No member is required, and there is no risk of significantly reducing the cost. Further, the polyethylene terephthalate film of the plastic film layer of the laminated body can be provided with an inorganic compound vapor deposition film on the surface.

This is intended to provide a gas barrier layer in the laminate constituting the standing pouch (10) for the purpose of improving the storage stability of the contents, and is to provide a gas barrier of an inorganic compound on the surface of the plastic film. A gas barrier film formed by vapor deposition is used as the film of the layer.

By the way, a thin-film film layer of a metal such as aluminum or a metal foil such as aluminum is also effective as a gas barrier layer, but it is not suitable for cooking in a microwave oven because sparks due to high frequencies are generated.

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

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

As a method for forming the vapor-deposited film layer, an inorganic compound such as SiO or AlO may be coated on a plastic film provided with an anchor coat layer by a vacuum vapor deposition method to form an inorganic compound layer by the vacuum vapor deposition method. it can. Incidentally, the thickness of the thin-film 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, (a) one or more alkoxides or hydrolysates thereof, or both, or (b) tin chloride. A coating agent containing a mixed aqueous solution as a main component can be applied onto 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, it is possible to improve the adhesion with the anchor coat layer.

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

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

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

Further, when SiO is used as the gas barrier layer, for example, the coating film is transparent, so that the contents can be visually seen from the outside of the pouch. These may be used properly according to the application and the required quality.

Further, the polyethylene terephthalate film of the plastic film layer of the laminated body can be a hollow polyethylene terephthalate film.

In this case, by selectively using a hollow polyethylene terephthalate film, a stretch-balanced portion can be used, so that the laminated body of the body is linearly cut and opened along the planned opening line. Even when trying to do so, it is effective in preventing problems such as so-called ripping, in which the direction of ripping is greatly deviated.

Further, it is possible to further provide a polyamide film having a linear cut property in the horizontal direction of the pouch body portion in the intermediate film layer of the laminated body.

In this case, by adding the polyamide film layer to the laminate, it is possible to deduct mechanical strength such as puncture resistance, but there is no risk of impairing the linearity of tearing.

Further, the polyethylene terephthalate film of the intermediate film layer of the laminated body may be provided with a scratch processing line along the planned opening line of the pouch body.

In this case, by providing the scratched line directly on the intermediate film layer, it is possible to provide a mechanism for assisting the straight line cutting property even when the film is opened by tearing, so that the linearity can be more easily and stably achieved. It is effective in realizing it.

Further, the scratch processing line can be provided by sewing processing or half-cut processing. As a result, it is possible to provide a mechanism for assisting the straight line cutting property, which is effective in realizing more easy and more stable linearity, and has an advantage that the productivity of scratch processing is also excellent.

In addition, if necessary, a printing layer can be provided on the layer visible from the outside of the pouch in the laminated body for the purpose of improving the image as a product, displaying necessary information about the contents, and improving the design. The print layer may be provided on the outermost layer of the pouch.

Further, the print layer may be provided on a part of the pouch, or may be provided over 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 from among the known printing methods, printability on a plastic film, design such as color tone, adhesion, and safety as a food container. If such factors are taken into consideration, it may be appropriately selected.

For example, it can be selected from known printing methods such as a gravure printing method, an offset printing method, a gravure offset printing method, a flexo printing method, a silk screen printing method, and an inkjet printing method. 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.

In this way, according to the present invention, in a self-supporting pouch that can cook the contents in a microwave oven, the steam generated from the contents by the cooking can be discharged to the outside automatically. It is possible to provide a standing pouch that is provided with a steam venting mechanism, is easy to open when opened, has excellent straightness of the cut end, and can maintain the opening shape of the opening.

Hereinafter, the present invention will be described in more detail with reference to Examples 1 to 4 and Comparative Examples 1 to 2 and with reference to figures. However, the standing pouch according to the present invention is not limited to the examples shown here. The present invention is limited by the claims.

FIG. 3 is a schematic plan view showing an external shape and dimensions for explaining an example of a standing pouch according to the present invention and a comparative example.

Based on Examples 1 to 4 of the standing pouch and Comparative Examples 1 to 2, the laminated body-prepared pouch was made into a bag and used as an evaluation sample.
That is, the dimensions of the standing pouch are 158 mm in length x 150 mm in width.
And said.

The pouch is equipped with an automatic steam venting mechanism (12). This automatic steam bleeding mechanism (12) is common to Examples 1 to 4 and Comparative Examples 1 to 2, and is the seal portion of the side end portion (2) on the upper right side of FIG. Is a bent portion of the seal that is convex toward the inside of the pouch.

Further, the notch (8) is provided in the seal portion of the side end portion (2) facing the automatic steam venting mechanism (12), and the planned opening line (5) is continuously provided in the horizontal direction. The tearing direction for opening is the direction from left to right toward FIG. 3, as shown by the thick arrow in FIG.

The contents were placed in a standing pouch prepared for evaluation, sealed, and then cooked in a microwave oven for evaluation.

The contents to be contained were meatballs.

In addition, evaluation was performed after cooking in a microwave oven.

The evaluation items are as follows.
・ Suitable for cooking in a microwave oven ・ Cutability at the time of opening ・ Presence / absence of tearing at the time of opening: (Medium or higher was evaluated as ×)
-Appearance after opening.

<Example 1>
FIG. 4 is a schematic partial cross-sectional view of a laminate constituting the pouch for explaining Example 1 of the standing pouch according to the present invention.

The layer structure of the laminated body (50) is as follows.
Polyethylene terephthalate film with transparent inorganic compound vapor deposition film (thickness 12 μm) (30) / Polyethylene terephthalate film with linear cut property (thickness 12 μm) (33) / Straight cut property heat-resistant non-stretched polypropylene resin layer (thickness 60 μm) ( 34).

The polyethylene terephthalate film (thickness 12 μm) (30) with a transparent inorganic compound vapor deposition film is composed of a polyethylene terephthalate film (31) and a transparent inorganic compound vapor deposition film (32).

<Example 2>
FIG. 5 is a schematic partial cross-sectional view of a laminate constituting the pouch for explaining Example 2 of the standing pouch according to the present invention.

The layer structure of the laminated body (51) is as follows.
Polyethylene terephthalate film with transparent inorganic compound vapor deposition film (thickness 12 μm) (30) / Polyethylene terephthalate film with linear cut property (thickness 12 μm) with sewing machine (35) / Straight cut property Heat resistant non-stretched polypropylene resin layer (thickness) 60 μm) (34).

That is, in addition to the first embodiment, the intermediate film layer is further provided with sewing processing (38).

<Example 3>
FIG. 6 is a schematic partial cross-sectional view of a laminate constituting the pouch for explaining Example 3 of the standing pouch according to the present invention.

The layer structure of the laminated body (52) is as follows.
Polyethylene terephthalate film with transparent inorganic compound vapor deposition film (thickness 12 μm) (30) / Polyamide film with linear cut property (thickness 15 μm) (40) / Polyethylene terephthalate film with linear cut property (thickness 12 μm) (33) / Straight cut property Heat resistant unstretched polypropylene resin layer (thickness 60 μm) (34).

That is, in addition to Example 1, a polyamide film (thickness 15 μm) (40) having a linear cut property was further subjected to a linear cut property with a polyethylene terephthalate film (thickness 12 μm) (30) having a transparent inorganic compound vapor deposition film. It is added between the polyethylene terephthalate film (thickness 12 μm) (33) having.

<Example 4>
FIG. 7 is a schematic partial cross-sectional view of a laminate constituting the pouch for explaining Example 4 of the standing pouch according to the present invention.

The layer structure of the laminated body (53) is as follows.
Medium-sized polyethylene terephthalate film with transparent inorganic compound vapor deposition film (thickness 12 μm) (36) / Polyethylene terephthalate film with linear cut property (thickness 12 μm) (33) / Straight cut property heat-resistant non-stretched polypropylene resin layer (thickness 60 μm) ) (34).

That is, the polyethylene terephthalate film (thickness 12 μm) with the transparent inorganic compound vapor deposition film of Example 1 was used with the polyethylene terephthalate film (37) having a “intermediate” grade.

<Comparative example 1>
FIG. 8 is a schematic partial cross-sectional view of a laminated body constituting the pouch for explaining Comparative Example 1 of the standing pouch according to the present invention.

The layer structure of the laminated body (54) is as follows.
Polyethylene terephthalate film with transparent inorganic compound vapor deposition film (thickness 12 μm) (30) / polyamide film (thickness 15 μm) (41) / linear cut heat-resistant non-stretched polypropylene resin layer (thickness 60 μm) (34).

That is, a polyamide film (thickness 15 μm) (41) was used as the intermediate film layer adjacent to the sealant layer. This polyamide film (thickness 15 μm) (41) does not have linear cutability. Therefore, the portion of the intermediate film layer is a portion that deviates from the structure of the laminated body according to the present invention.

<Comparative example 2>
FIG. 9 is a schematic partial cross-sectional view of a laminate constituting the pouch for explaining Comparative Example 2 of the standing pouch according to the present invention.

The layer structure of the laminated body (55) is as follows.
Polyethylene terephthalate film with transparent inorganic compound vapor deposition film (thickness 12 μm) (30) / Polyamide film having linear cut property (thickness 15 μm) (40) / Heat-resistant non-stretched polypropylene resin layer (thickness 60 μm) (39).

That is, a heat-resistant non-stretched polypropylene resin layer (thickness 60 μm) (39) is used as the sealant layer without considering the linear cut property. Therefore, the portion of this sealant layer is a portion that deviates from the structure of the laminated body according to the present invention.

Table 1 shows the evaluation results of Examples 1 to 4 and Comparative Examples 1 to 2.

As can be seen from the results shown in Table 1, the standing pouches of the present invention, Examples 1 to 4, all had good results in microwave oven cooking suitability and cutability at the time of opening. This is a result in which no significant difference is observed as compared with Comparative Examples 1 and 2.

However, with respect to Examples 1 to 4, which are standing pouches according to the present invention, comparisons deviating from the structure of the laminated body of the standing pouches according to the present invention in the occurrence of splitting at the time of opening and in the appearance after opening. A clear advantage is seen as compared with Example 1 and Comparative Example 2.

Therefore, according to the present invention, in a self-supporting pouch capable of cooking the contents in a microwave oven, an automatic steam bleeding mechanism capable of discharging steam generated from the contents by cooking to the outside is provided. As a result of verification, it is possible to provide a standing pouch that is easy to open when opened, has excellent straightness of the cut end, and can maintain the opening shape of the opening opening.

Subsequently, the examples 1 to 4 and the comparative examples 1 to 2 will be individually considered.

In Example 1, all the evaluation items of microwave oven cooking suitability, cutability at the time of opening, tearing at the time of opening, and appearance after opening are evaluated as 〇.

This is in the layer structure of the laminated body (50).
By having a polyethylene terephthalate film (thickness 12 μm) having linear cut property and a heat-resistant non-stretched polypropylene resin layer (thickness 60 μm) having linear cut property, it has cut property at the time of opening, tearing at the time of opening, and opening. It is considered that excellent results were obtained in the later appearance.

In Example 2, all the evaluation items of microwave oven cooking suitability, cutability at the time of opening, tearing at the time of opening, and appearance after opening are evaluated as 〇.

This is in the layer structure of the laminated body (51).
Polyethylene terephthalate film with linear cutability (thickness 12 μm) with sewing machine / linear cut property By having a heat-resistant non-stretched polypropylene resin layer (thickness 60 μm), it has cutability at the time of opening and tearing at the time of opening It is considered that excellent results were obtained in the appearance after opening.

Further, as compared with Comparative Example 1, it is considered that the addition of perforation processing is more effective in stabilizing the cut property at the time of opening and the tearing at the time of opening.

In Example 3, all the evaluation items of microwave oven cooking suitability, cutability at the time of opening, tearing at the time of opening, and appearance after opening are evaluated as 〇.

This is in the layer structure of the laminated body (52).
It has a polyamide film with linear cut property (thickness 15 μm) / polyethylene terephthalate film with linear cut property (thickness 12 μm) / heat-resistant non-stretched polypropylene resin layer with linear cut property (thickness 60 μm). Since each of these has a linear cut property, it is considered that excellent results were obtained in the cut property at the time of opening, the tearing at the time of opening, and the appearance after opening.

A slight difference from Example 1 was observed in the cutability at the time of opening and the appearance after opening, which is considered to be due to the inclusion of the polyamide film layer, but the evaluation result was 〇. Yes, it is within the practical range.

That is, although the mechanical strength such as puncture resistance is improved by adding the polyamide film layer, the polyamide film itself has a linear cut property, so that the laminate as a whole is cut at the time of opening. It is considered that excellent results were obtained in terms of sex, tearing at the time of opening, and appearance after opening.

In Example 4, all the evaluation items of microwave oven cooking suitability, cutability at the time of opening, tearing at the time of opening, and appearance after opening are evaluated as 〇.

This is in the layer structure of the laminated body (53).
A polyethylene terephthalate film (thickness 12 μm) with a transparent inorganic compound vapor deposition film is used, and in addition to Example 1, a polyethylene terephthalate film (thickness 12 μm) is used to achieve stable linear cutability. It is probable that the effect was obtained. Therefore, it is considered that excellent results were obtained in terms of cutability at the time of opening, tearing at the time of opening, and appearance after opening.

Comparative Example 1 is evaluated as x in terms of microwave oven cooking suitability, cutability at the time of opening, splitting at the time of opening, and appearance after opening, with respect to the appearance after opening.

This is in the layer structure of the laminated body (54).
Since it contains a polyamide film (thickness 15 μm) and this layer is not imparted with linear cutability, the laminated body as a whole may be torn again at the time of opening, and as a result, the appearance after opening is impaired. It is considered to be.

In Comparative Example 2, among the suitability for cooking in a microwave oven, the cutability at the time of opening, the tearing at the time of opening, and the appearance after opening, the appearance at the time of opening and the appearance after opening are evaluated as x.

This is in the layer structure of the laminated body (55).
The portion corresponding to the sealant layer uses a heat-resistant non-stretched polypropylene resin layer (thickness 60 μm), and since this layer itself is not imparted with linear cut property, the laminated body as a whole is torn again when opened. As a result, it is probable that the appearance after opening was impaired.

As described above, according to the present invention, in a self-supporting pouch that can cook the contents by a microwave oven, the steam generated from the contents by the cooking can be discharged to the outside. It was possible to verify that it is possible to provide a standing pouch that is equipped with a pulling mechanism, is easy to open when opened, has excellent straightness of the cut end, and can maintain the opening shape of the opening.

1 ... Front body 2 ... Both ends 3 ... Lower end 4 ... Upper end 5 ... Scheduled opening line 6 ... Folding line 7 ... Rear body 8 ... Notch 10 ... Bottom film 11 ... Scheduled opening line 12 ... Automatic steam removal mechanism 14 ... Contents 20 ... Opening 30 ... Polyethylene terephthalate film with transparent inorganic compound vapor deposition film (thickness) 12 μm)
31 ... Polyethylene terephthalate film 32 ... Transparent inorganic compound vapor deposition film 33 ... Polyethylene terephthalate film having linear cut property (thickness 12 μm) 34 ... Linear cut property Heat resistant unstretched polypropylene resin layer (thickness 60 μm )
35 ... Polyethylene terephthalate film with straight cut property (thickness 12 μm) with sewing machine 36 ... Intermediate polyethylene terephthalate film with transparent inorganic vapor deposition film (thickness 12 μm)
37 ... Medium-sized polyethylene terephthalate film 38 ... Sewing machine 39 ... Heat-resistant unstretched polypropylene resin layer (thickness 60 μm)
40 ... Polyamide film having linear cut property (thickness 15 μm)
41 ... Polyamide film (thickness 15 μm)
50 ... Laminated body 51 ... Laminated body 52 ... Laminated body 53 ... Laminated body 54 ... Laminated body 55 ... Laminated body 90 ... Pouch upper part 100 ... Standing pouch

Claims (9)

A pouch made of a laminate of plastic films that can be cooked in a microwave oven.
The laminate is composed of a plastic film layer on the outermost layer side of the pouch, an intermediate film layer, and a sealant layer on the innermost layer side of the pouch.
The pouch is bagged to accommodate the contents by the front torso, the back torso, and the bottom film placed between them.
The pouch is equipped with an automatic steam removal mechanism that can discharge the steam generated from the contents to the outside of the pouch during cooking in a microwave oven.
The front body portion and the rear side body portion have four sides and are arranged so that the sealant layers face each other.
Of these four sides, the left and right ends of the body are sealed, and both ends of the pouch are sealed.
At the bottom of the torso, the bottom film is folded and placed between the front torso and the back torso, and the lower end of the pouch is sealed and sealed with the torso so that the bottom film can form the bottom. And
In the upper part of the torso, the front torso and the back torso are sealed at the upper end of the pouch after accommodating the contents, and the entire pouch can be sealed.
Notches are provided on at least one of the seals at both ends of the body, and the horizontal straight line on the front and back of the pouch is the planned opening line, starting from this notch.
A polyethylene terephthalate film is used for the plastic film layer on the outermost layer side of the laminate.
The intermediate film layer of the laminated body is a layer adjacent to the sealant layer, and uses a polyethylene terephthalate film having a linear cut property in the horizontal direction of the pouch body.
A standing pouch, wherein the sealant layer on the innermost layer side of the laminated body is a polypropylene resin layer having a linear cut property in the horizontal direction of the pouch body. Claim 1 is characterized in that the cut is provided at a position between the height of the surface of the contents and the seal portion at the upper end of the pouch in a state where the pouch is self-supporting after the contents are stored. The standing pouch described in. The standing pouch according to claim 1 or 2, wherein the sealant layer is laminated with a polypropylene resin film having a linear cut property in the horizontal direction of the pouch body. The automatic steam bleeding mechanism is characterized in that, in cooking with a microwave oven, a part of the seal portion of the pouch is peeled off and steamed due to the generation of steam from the contents, according to claims 1 to 3. The standing pouch described in either. The standing pouch according to any one of claims 1 to 4, wherein the polyethylene terephthalate film of the plastic film layer of the laminated body is provided with an inorganic compound vapor deposition film on the surface thereof. The standing pouch according to any one of claims 1 to 5, wherein the polyethylene terephthalate film of the plastic film layer of the laminate is a hollow polyethylene terephthalate film. The standing pouch according to any one of claims 1 to 6, wherein the intermediate film layer of the laminated body further contains a polyamide film having a linear cut property in the horizontal direction of the pouch body. Any one of claims 1 to 7, wherein the polyethylene terephthalate film of the intermediate film layer of the laminated body is provided with a scratched line along the planned opening line of the pouch body. Standing pouch described in. The standing pouch according to claim 8, wherein the scratched line is provided with a perforated line or a half-cut line.

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