JP2022032143A - Packaging bag - Google Patents

Abstract

To provide a packaging bag with a fastener tape which has a machine filling property corresponding to an automatic filling machine, has a self-standing property, and comprises an automatic steam vent mechanism that allows for cooking using a microwave oven.SOLUTION: A packaging bag which allows for cooking a content using a microwave oven, comprises a front body part, a rear body part, a bottom part, and a flap. A part of a seal of a side end part is a protruding seal part. An upper side of the body part is an opening part for machine filling and allows a content to be filled. The bottom part enables the packaging bag to self-stand At the flap, a flap opening-designated line is provided in a width direction sequentially from a tip part, and next, an opening/closing part in the width direction by a fastener tape is provided, and furthermore, a water-tight joint part is provided in the width direction further on an inner side of a fitting part of the fastener tape. The water-tight joint part separates the fitting part of the fastener tape and a content storage space of the packaging bag.SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging bag that can be used for cooking in a microwave oven. In particular, it is a packaging bag in the form of a standing pouch that has a bottom film at the bottom and can stand on its own, and is an automatic steam venting mechanism that can automatically discharge steam generated from the contents during cooking to the outside. It is a packaging bag equipped with.

Packaging bags, which are a type of packaging material, are widely used and are composed of a single layer or a laminate based on a plastic film, and various forms are used for a wide range of purposes. It has become an integral part of our lives.

Packaging bags are also used as containers for liquids, 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 are available in supermarkets, drug stores, and convenience stores. The product shelves are crowded.

The advantages of packaging bags are that they are cheaper than containers such as cans and bottles, that they can respond to various required qualities with detailed material design, or that they are lightweight before filling the contents and in distribution and storage. It is said that it is space-saving. The packaging bag can also be said to be an environmentally adaptable container from the viewpoint of reducing waste.

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

Some packaging bags that have self-reliance have been commercialized and are generally called standing pouches. Having self-reliance has advantages in displaying and displaying products, and also has advantages in usability. 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.

Patent Document 1 proposes a pouch having an internal space for accommodating the contents, a first opening having a fastener, and a second opening for filling the contents in the internal space on the side. However, in order to ensure independence in design, the second opening for filling tends to be narrow, and stable filling by a general-purpose automatic filling machine is difficult.

That is, in the packaging bag configuration shown in Patent Document 1, since the second opening for filling is provided on the side portion, the opening for filling and the folding width of the bottom film are in a trade-off relationship. When the filling frontage is widened in consideration of the height dimension in the microwave oven and the filling suitability, there is a drawback that the folding width of the bottom film becomes small and the independence is lost.

International Publication No. 13/115362

The present invention has been made in view of such a situation, is a packaging bag based on a plastic film, has machine filling suitability corresponding to a general-purpose automatic filling machine, and has independence. The challenge is to provide a packaging bag with a zipper tape that can be cooked in a microwave oven with an automatic steam removal mechanism.

The invention according to claim 1 is a means for solving the above problems.
It is a packaging bag made of a film with a sealant layer and capable of cooking the contents in a microwave oven.
The packaging bag has a space inside that can store the contents, and is composed of a front body, a rear body, a bottom, and a flap.
The front torso and the back torso are sealed at the left and right side edges.
A part of the seal on the side end is a seal part that overhangs the inside of the packaging bag body instead of the seal on the side end.
The upper side of the body part becomes an opening for filling the machine, which enables filling of the contents, and after filling, the front side body part and the rear side body part are sealed, and the packaging bag can be sealed.
Below the seal on the upper side, there is a planned opening line for the body in the width direction.
At the bottom of the torso, between the anterior torso and the back torso, a bottom film is extensiblely folded and sealed to form the bottom.
This bottom allows the packaging bag to stand on its own,
At the top of the front torso, there is a flap that protrudes diagonally upward from the torso.
The flap consists of a flap rear film that is continuous from above the packaging bag beyond the height position of the flap, and a flap front film that is continuous from the bottom of the packaging bag beyond the height position of the branch. Together, the side edges of the flaps are sealed and the tips of the flaps are closed and formed by sealing or folding.
The flaps are in order from the tip.
There is a planned opening line for the flap in the width direction,
Next, there is an opening / closing part in the width direction with a chuck tape.
Further, a watertight joint portion is provided in the width direction inside the fitting portion of the chuck tape.
The watertight joint portion is a packaging bag characterized in that the fitting portion of the chuck tape and the content storage space of the packaging bag are separated from each other.

Further, the invention according to claim 2 is based on the invention.
The watertight joint is formed by either joining the pedestals of the opposing chuck tapes, joining the pedestals of one chuck tape to the sealant layer of the flap facing each other, or joining the sealant layers of the opposing flaps to each other. The packaging bag according to claim 1, wherein the packaging bag is characterized by the above.

Further, the invention according to claim 3 is based on the invention.
The cross section of the fitting portion perpendicular to the longitudinal direction of the chuck tape is vertically asymmetric with respect to the center line, and the inner fitting strength from the content side of the flap and the outer fitting from the tip side of the flap are used. The first or second aspect, wherein the strength is inner fitting strength> outer fitting strength, and the inner fitting strength is 60% or more of the sealing strength of the side end portion. It is a packaging bag.

Further, the invention according to claim 4 is the invention.
One of claims 1 to 3, wherein the sealing strength of the overhanging seal portion to the inside of the packaging bag body is a strength in the range of 40% to 80% of the sealing strength of the side end portion. It is a packaging bag described in.

According to the present invention, it is a packaging bag based on a plastic film, has mechanical filling suitability corresponding to a general-purpose automatic filling machine, has self-sustaining property, and has an automatic steam venting mechanism. It is possible to provide a packaging bag with a zipper tape that can be cooked in a microwave oven.

In particular, a part of the seal at the side end is replaced with the seal at the side end and is an overhanging seal part inside the body of the packaging bag, so that this part is effective as an automatic steam venting mechanism in cooking. It works.

At the bottom of the torso, between the anterior torso and the back torso, a bottom film is extensiblely folded and sealed to form the bottom, which allows the packaging bag to be stable and self-supporting. It is possible.

In addition, a flap protruding diagonally upward from the body is provided on the upper part of the front body, so that it is possible to add ingredients and ingredients to cook from this part, for example, before cooking. become.

Further, the flap is provided with a line for opening the flap in the width direction in order from the tip portion thereof, then an opening / closing portion in the width direction by a chuck tape is provided, and further, inside the fitting portion of the chuck tape. By providing a watertight joint in the width direction, it is possible to separate the fitting part of the chuck tape and the content storage space of the packaging bag, and it is easy to use when cooking by adding ingredients and ingredients. It is effective in improving.

In particular, according to the second aspect of the present invention, the watertight joint can be formed without using a separate member, and the formation can be made easily and inexpensively.

Further, according to the invention of claim 3, it can be realized by making the cross-sectional shape of the chuck tape non-symmetrical with respect to the center line as a method of adjusting the fitting strength. It is possible to avoid complicated manufacturing methods such as using members.

Further, the inner fitting strength from the content side of the flap and the outer fitting strength from the tip side of the flap are inner fitting strength> outer fitting strength, and the inner fitting strength is the side end portion. When the sealing strength is 60% or more, for example, after the cooking utensils are put in from the flap of the packaging bag, the flap is closed and sealed again with the chuck tape, and the cooking is performed by heating in the microwave oven. It can be used for automatic discharge of steam.

Further, in particular, according to the invention of claim 4, the sealing strength of the overhanging seal portion to the inside of the packaging bag body is in the range of 40% to 80% of the sealing strength of the side end portion. It is possible to achieve both steamability and drop resistance.

FIG. 1 is a planar (partially perspective) schematic view for explaining an embodiment of a packaging bag according to the present invention. FIG. 2 is a perspective (partially perspective) schematic view for explaining an embodiment of the packaging bag according to the present invention. FIG. 3 is a partial cross-sectional schematic diagram for explaining an embodiment of the structure of the chuck tape and the watertight joint portion in the packaging bag according to the present invention. FIG. 4 is a schematic partial cross-sectional view for explaining another embodiment of the structure of the chuck tape and the watertight joint portion in the packaging bag according to the present invention. FIG. 5 is a partial cross-sectional schematic diagram for explaining still another embodiment of the structure of the chuck tape and the watertight joint portion in the packaging bag according to the present invention. FIG. 6 is a schematic plan view for explaining the configuration of an embodiment of the packaging bag according to the present invention. FIG. 7 is a schematic plan view for explaining the configuration of a comparative example of the packaging bag according to the present invention.

Hereinafter, a more detailed description of the present invention will be added with reference to the drawings. However, the present invention is not limited to the examples shown here. The present invention is specified by the claims.

FIG. 1 is a planar (partially perspective) schematic view for explaining an embodiment of a packaging bag according to the present invention.

The present invention is a packaging bag (100) made of a film provided with a sealant layer and capable of cooking the contents in a microwave oven. That is, it is a packaging bag (100) made of a laminate having a sealant layer using a plastic film as a base material, and is formed by sealing the sealant layers with each other.

The packaging bag (100) has a space inside which the contents can be stored, and has a body portion (30), a bottom portion (50), and a flap (30) composed of a front side body portion (10) and a rear side body portion (20). It is composed of 40).

The front torso (10) and the rear torso (20) are sealed at the left and right end portions (5) to form a seal portion (6), forming the torso (30). The seal portion (6) is formed so as to surround the peripheral edge of the body portion (30). However, in FIG. 1, the rear body portion (20) is behind the front body portion (10) and is invisible.

Further, the upper side (8) of the body portion (30) is used as an opening for mechanical filling to enable filling of the contents, and after filling, the front side body portion (10) and the rear side body portion (20) are connected. It is sealed, a sealing portion (7) is formed on the upper side (8), and the packaging bag (100) is sealed.

The upper side (8) is an opening for filling the machine, but the upper side (8) is not affected by the folding width of the bottom film (14), except for the sealing portion (6) of the side end portion (5). It is possible to open to the full length of. This is effective in stabilizing and improving the filling suitability of the packaging bag (100) for the automatic filling machine.

The bottom portion (50) is sealed by the bottom film (14) being expandably folded along the fold line (15) between the front side body portion (10) and the rear side body portion (20).

When the bottom film (14) is filled with the contents, the bottom film (14) expands due to its volume and weight, the bottom surface is formed by the expanded bottom portion (50), and the packaging bag (100) can stand on its own. Is.

Due to this independence, for example, it is possible to perform cooking while the packaging bag (100) is independent in the microwave oven, and the packaging bag (100) having excellent convenience can be obtained.

Further, in the example shown in FIG. 1, the flap (40) is shown above the height position (3) of the flap.

FIG. 2 is a perspective (partially perspective) schematic view for explaining an embodiment of the packaging bag according to the present invention.

A part of the seal portion (6) formed on the side end portion (5) is curved and overhangs inward of the packaging bag body portion (30) in place of the seal portion (6) of the side end portion (5). In addition, it is an overhanging seal portion (9), and this overhanging sealing portion (9) acts as an automatic steam venting mechanism when cooking the contents in a microwave oven.

That is, the contents heated in the microwave cooking generate steam inside the packaging bag (100), and the steam increases the volume of the sealed packaging bag (100) and raises the internal pressure. Volume expansion occurs three-dimensionally radially outward from the volume center of the packaging bag (100).

At this time, stress concentration occurs in the overhanging seal portion (9) which is curved and overhangs toward the inside of the packaging bag body (30) due to an increase in internal pressure, and when a certain pressure is exceeded, the overhanging seal portion (9) is peeled off, and the water vapor inside the packaging bag (100) is automatically discharged to the outside of the packaging bag (100).

In particular, as in the examples shown in FIGS. 1 and 2, in the overhanging seal portion (9) curved toward the inside of the packaging bag (100) of the overhanging sealing portion (9), from the volume center of the packaging bag (100). When there is a corner portion (11) of the overhanging seal portion (9) at a short distance, the stress on the packaging bag (100) side due to the increase in internal pressure is further concentrated on the corner portion (11).

Therefore, the peeling of the seal portion (9) proceeds with the corner portion (11) as a trigger. Incidentally, the outside of the overhanging sealed portion (9) in the figure is an unsealed portion (4).

As the seal peeling of the overhanging seal portion (9) progresses, the internal space of the packaging bag (100) is finally connected to the outside, and water vapor is automatically discharged. This is desirable in cooking performed in a microwave oven, and it is possible to avoid explosive bag breakage due to a sudden increase in internal pressure of the packaging bag (100), and packaging after cooking. It is also effective in preventing the contents and water vapor from being ejected and the accompanying burns of fingers when taking out and handling the bag (100).

As shown in the example of the packaging bag (100) shown in FIGS. 1 and 2, the overhanging seal portion (9) is provided immediately below the vicinity of the flap height position (3). The contents are filled below it, which is convenient because it does not cause the eruption of the heated contents and does not interfere with the discharge of the generated steam.

Further, below the seal portion (7) on the upper side (8), a planned opening line (13) for the body portion in the width direction is provided.

As described above, the upper side (8) of the body portion (30) functions as an opening for mechanical filling, but after filling the contents, the front side body portion (10) and the rear side body portion (20) Is sealed to form a sealed portion (7), and the packaging bag (100) is sealed.

When the contents are finally taken out after cooking, the upper part of the body (30) of the packaging bag (100) is cut along the planned opening line (13) of the body to form an opening. You can take things out. The tearing can be done using a blade such as a pair of scissors or a knife.

Further, in the examples shown in FIGS. 1 and 2, the seal portion (6) of the side end portion (5) is provided with a notch (12) continuous with the planned opening line (13) of the body portion. When the notch (12) is provided and the planned opening line (13) of the body portion is an easy opening mechanism, the opening can be easily performed by using fingers. Further, the planned opening line (13) of the body portion can be displayed so that it can be visually visually recognized by means such as printing, if necessary.

On the other hand, in the lower part of the body portion (30), the bottom film (14) is foldable and sealed with a fold line (15) between the front side body portion (10), the rear side body portion and (20). It forms the bottom (50).

The bottom portion (50) is formed by sandwiching the bottom film (14) between the front side body portion (10) and the back side body portion (20) and sealing the bottom portion (50), and the volume and weight thereof when the contents are filled. The bottom film (14) is expanded and the bottom surface is formed by the expanded bottom portion (50), and the packaging bag (100) can be self-supporting.

Since the packaging bag (100) has independence, it has an advantage in display and display as a product, and also has an advantage in usability. For example, it has further convenience in taking out the contents.

Furthermore, since it can maintain its independence even in the microwave oven, it is highly convenient for cooking, and in addition to being easy to open after cooking, it is also effective for maintaining the shape of the packaging bag (100). ..

On the other hand, on the upper part of the body portion (30), a flap (40) protruding diagonally upward from the height position (3) of the flap of the front side body portion (10) is provided.

The flap (40) extends beyond the flap height position (3) from above the front fuselage (10) to the flap rear film and beyond the flap height position (3) from below the front fuselage (10). The continuous flap front film and the respective sealant layers are overlapped with each other facing each other.

The side end (44) of the flap (40) is sealed to form a seal (43), and the tip (41) of the flap (40) is closed by a seal or film fold to close the flap (40). Sealed structure is formed.

In the example shown in FIG. 2, the flap front film continuous from below the front fuselage (10) is visible, but the flap rear film is invisible behind it. Further, in the example shown in FIG. 2, the tip end portion (41) of the flap (40) is closed by the seal portion (42).

The flap (40) is provided with a planned opening line (45) of the flap in the width direction in order from the tip portion (41), and then is provided with an opening / closing portion in the width direction by a chuck tape (46). , A watertight joint portion (47) is provided in the width direction on the content side of the chuck tape (46).

That is, in the packaging bag (100) according to the present invention, the fitting portion of the chuck tape (46) and the content storage space of the packaging bag (100) are separated by the watertight joint portion (47).

The packaging bag (100) according to the present invention has been described with reference to FIGS. 1 and 2, but an example of its use will be added here.

For example, consider a case where the contents are distributed and sold as a seasoning liquid for cooking by a food manufacturer or the like, and the seasoning liquid is filled and sealed in a packaging bag (100). Ingredients for cooking shall be added by general consumers as appropriate during cooking.

That is, a general consumer purchases a cooking seasoning liquid filled in a packaging bag (100) as a product. At this time, the packaging bag (100) according to the present invention makes it easy for a general consumer to additionally input ingredients and ingredients from the flap during cooking.

First, the upper part of the flap (40) of the packaging bag (100) can be cut along the planned opening line (45) of the flap provided on the flap (40) to form an opening. The tearing can be done using a blade such as a pair of scissors or a knife.

Further, the examples shown in FIGS. 1 and 2 are examples in which a notch (16) continuous with the planned opening line (45) of the flap is provided on the seal portion (43) of the side end portion (44). When the notch (16) is provided and the planned opening line (45) of the flap is an easy opening mechanism, the opening can be easily performed by using fingers. Further, the planned opening line (45) of the flap can be displayed so as to be visually visible by means such as printing, if necessary.

Subsequently, the fitting of the chuck tape (46) is released, and the watertight joint portion (47) is opened. In this state, the ingredients to be cooked and the ingredients can be additionally added to the packaging bag (100) via the flap (40).

After the ingredients are put in from the flap (40), the flap (40) is closed and sealed again with the chuck tape (46), and cooking is performed in a microwave oven. During cooking, the automatic steaming mechanism of the overhanging seal portion (9) operates to automatically discharge steam.

In this way, after all cooking is completed, the planned opening line (12) on the body of the packaging bag (100) is torn and opened, and the cooked contents are transferred to tableware or the like. It can be used for food.

The packaging bag according to the present invention has a flap (40) that is separated from the fitting portion of the chuck tape (46) and the content storage space of the packaging bag (100) by the watertight joint portion (47). Before opening, it is possible to prevent the contents stored in the body portion (30) from coming into contact with the fitting portion of the chuck tape (46).

Therefore, in order to prevent the contents from entering the flap (40) and to release and refit the chuck tape (46) for charging the cooking ingredients, for example, the cooking seasoning liquid is pre-packaged. It is convenient because there is no risk of getting your hands dirty due to the contents filled in the bag (100).

FIG. 3 is a partial cross-sectional schematic diagram for explaining an embodiment of the structure of the chuck tape and the watertight joint portion in the packaging bag according to the present invention.

The flaps (40) are a flap rear film (48) that is continuous from above the front fuselage (10) beyond the flap height position (3), and a flap height position (3) from below the front fuselage (10). ) Is continuous, and the flap front film (49) is configured such that the respective sealant layers (1) are opposed to each other and overlapped with each other.

As described above, in the present invention, the flap (40) is provided with a flap opening line (45) in the width direction and an opening / closing portion in the width direction by a chuck tape (46) in order from the tip portion (41). Further, a watertight joint portion (47) is provided in the width direction inside the fitting portion (2) of the chuck tape (46), that is, on the content side.

Of these, FIG. 3 shows the chuck tape (46) in the flap (40) and the watertight joint (47). The watertight joint portion (47) separates the fitting portion (2) of the chuck tape (46) from the content storage space of the packaging bag (100).

The watertight joint portion (47) can prevent the liquid content from leaking even when pressure is generated from the content side, and the fitting portion (2) of the chuck tape (46). It is possible to prevent the contents from coming into contact with the material.

Therefore, the watertight joint portion (47) is provided on the content side of the chuck tape (46). In the example shown in FIG. 3, the watertight joint portion (47) is formed by joining the pedestal of one chuck tape (46) and the sealant layer (1) on the opposite flap rear film (48) side. Is.

The joining method of the watertight joining portion (47) is not particularly limited, but for example, if it is a thermoplastic resin, it can be carried out by heat sealing.

FIG. 4 is a schematic partial cross-sectional view for explaining another embodiment of the structure of the chuck tape and the watertight joint portion in the packaging bag according to the present invention.

In the example shown in FIG. 4, the watertight joint portion is an example formed by joining the sealant layers (1) facing each other.

The joining method of the watertight joining portion (47) is not particularly limited, but for example, if it is a thermoplastic resin, it can be carried out by heat sealing.

FIG. 5 is a partial cross-sectional schematic diagram for explaining still another embodiment of the structure of the chuck tape and the watertight joint portion in the packaging bag according to the present invention.

In the example shown in FIG. 5, the watertight joint portion is an example formed by joining the pedestals of the opposing chuck tapes to each other.

The joining method of the watertight joining portion (47) is not particularly limited, but for example, if it is a thermoplastic resin, it can be carried out by heat sealing.

The chuck tape (46) used in the present invention has a vertically asymmetrical cross section of the fitting portion (2) perpendicular to the longitudinal direction thereof, and as shown in FIGS. 3 to 5, the chuck tape (46) has a vertical asymmetry with respect to the center line (A). Because of the asymmetrical fitting form, the fitting portion (2) is relatively easy to come off in the portion above the center line (A) of the fitting portion (2), and the center line of the fitting portion (2). In the lower half of (A), the fitting portion (2) has a structure that is relatively difficult to come off.

That is, in the upper half of the fitting portion (2) above the center line (A), the male-female relationship of the chuck tape (46) is fitted at an angle that is easily disengaged with respect to the force for releasing the fitting. is doing. This is effective when the flap (40) is to be opened from the tip side thereof.

On the other hand, in the lower half of the fitting portion (2) below the center line (A), the male-female relationship of the chuck tape (46) fits at an angle that does not easily come off with respect to the force for releasing the fitting. There will be a difference depending on the match. This is effective in maintaining the sealing property of the packaging bag when a force is applied from the inside of the packaging bag.

Therefore, comparing the inner fitting strength of the flap (40) from the content side and the outer fitting strength of the flap from the planned opening line (45) side, the inner fitting strength> the outer fitting strength.

In other words, in this relationship, in the flap (40) portion of the packaging bag (100), when opening the flap (40), the release of the chuck tape (46) from the planned opening line (45) side of the flap, that is, It is relatively easy to open. That is, it is convenient when it is intended to additionally add ingredients and ingredients from the flap (40) before cooking.

On the contrary, the release of the chuck tape (46) from the content side has a relatively large resistance. When cooking ingredients are put in and cooked, it is possible to avoid the opening before the steaming mechanism operates when the internal pressure rises, and it is also convenient in terms of drop resistance and the like. ..

In the process of studying the present invention, we have repeated experiments and diligently studied the optimum value of the inner fitting strength. As a result, the inner fitting strength of the chuck tape (46) can be 60% or more of the sealing strength of the side end portion, and in this case, the contents are filled in the packaging bag (100) and dropped. It has been found that a packaging bag (100) having excellent drop resistance can be obtained.

The optimum value of the internal fitting strength is also related to the sealing strength of the sealing portion (9) overhanging the inside of the packaging bag body, which acts as an automatic steaming mechanism, and all of these are associated with a sudden increase in internal pressure. This is because it is related to tolerance.

As a result of diligent studies on this point as well, it is more preferable that the sealing strength of the overhanging sealing portion (9) is in the range of 40% to 80% of the sealing strength of the side end portion (6). I found.

The fitting strength is 60% or more of the seal strength of the side end portion (6), and the seal strength of the overhanging seal portion (9) is 40% to 80% of the seal strength of the side end portion (6). The strength in the range makes it possible to obtain a packaging bag (100) in which the automatic steaming mechanism works properly and has excellent drop resistance.

In this way, in a packaging bag based on a plastic film, it has mechanical filling suitability corresponding to a general-purpose automatic filling machine, has self-sustaining property, and is equipped with an automatic steam venting mechanism. It is possible to provide a packaging bag (100) with a chuck tape that can be cooked in a microwave oven.

Here, the material of each element constituting the packaging bag (100) according to the present invention will be described.

The packaging bag (100) according to the present invention is made of a film provided with a sealant layer. That is, it is made of a laminate having a sealant layer using a plastic film as a base material. In addition, the laminated body may include a layer having a necessary function such as a gas barrier layer for the purpose of improving the storage stability of the contents.

The plastic film 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.), Polyethylene or the like can be used, and it is appropriately selected according to the use of the packaging bag (100).

In particular, when polypropylene or polyethylene terephthalate is used as a plastic film, it is more preferable in terms of film strength and price. In addition, when a stretched polyamide film is used, it is possible to impart toughness against piercing and impact resistance to the laminated body.

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

Further, for the purpose of improving the storage stability of the contents, for example, an opaque layer that shields ultraviolet rays such as a colored film can be provided in the laminate constituting the packaging bag (100). Alternatively, a gas barrier layer can be provided in the laminate. For example, a gas barrier film having a gas barrier layer provided on the surface of the plastic film can be used.

Further, a metal foil such as aluminum or a metal vapor deposition film 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 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, etc. can be used, and are appropriately selected according to the intended use. In particular, when polypropylene or polyethylene terephthalate is used as a plastic film base material, it is more preferable in terms of film strength and price.

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, and after an anchor coat is provided 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 applying a printing method such as gravure coating of a paint in which a resin is dissolved in a solvent can be used, or a coating film can be formed by using a generally known coating method.

As a method for forming the vapor-film deposition layer, an inorganic compound such as SiO or AlO can be coated on a plastic film provided with an anchor-coated layer by a vacuum-film deposition method to form an inorganic compound layer by the vacuum-film deposition method. .. 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 a hydrolyzate thereof, or both, or (b) tin chloride. A coating agent containing a mixed aqueous solution as a main component is applied onto the film and dried by heating to form an inorganic compound layer by a coating method, which can be used as 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 it 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 the 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 packaging bag. These may be used properly according to the application and the required quality. Further, when the packaging bag (100) is provided with the print layer, it is also possible to use this portion as a window by setting a part thereof as a portion without the print layer.

The sealant layer (1) is formed by stacking two laminated bodies so that the sealant layers face each other, heating and pressurizing them to heat-seal them to adhere them to each other, and making a bag into a packaging bag (100). enable.

As the material of the sealant layer (1), a polyolefin-based resin is generally used among the thermoplastic resins, specifically, low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), and linear low. Ethylene-based resins such as density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer, ethylene-methacrylic acid resin copolymer, blended resin of polyethylene and polybutene, and Polypropylene-based resins such as homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer can be used.

To form the sealant layer (1), a molten resin can be formed by 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 laminated body by laminating a material that has been formed into a film state in advance by laminating.

Further, in the present invention, the flap (40) is provided with a chuck tape (46) as an opening / closing portion extending in the width direction, and for example, a polyolefin resin can be used as the material of the chuck tape (46). When a polyolefin resin is used, it is possible to bond the pedestals of the chuck tapes (46) to each other or to the sealant layer (1) of the opposing flaps (40) by heat sealing or the like, and the watertight joint portion (47). ) Can be formed.

Alternatively, the watertight joint portion (47) can also be formed by joining the sealant layers of the flaps (40) to each other. When the watertight joint portion (47) is formed by these methods, a separate member is not required, which is advantageous in terms of cost.

In addition, if necessary, for the purpose of improving the image as a product, displaying necessary information about the contents, and improving the design, the layer visible from the outside of the packaging bag in the laminate based on the plastic film. A print layer can be provided. The printing layer may be provided on the outermost layer of the packaging bag.

Further, the printing layer) may be provided on a part of the packaging bag, or may be provided over the entire surface of the packaging bag. Alternatively, as a method of providing the display unit without using the print 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 selected as appropriate.

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 flexographic printing method, a silk screen printing method, and an inkjet printing method. Above all, 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, the packaging bag based on a plastic film, which is the subject of the present invention, has machine filling suitability corresponding to a general-purpose automatic filling machine and has self-reliance. In addition, it is possible to provide a packaging bag with a zipper tape that is equipped with an automatic steam removal mechanism and can be cooked in a microwave oven.

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

A packaging bag for evaluation was prepared, filled with the contents, and evaluated.
The material composition of the packaging bag is as follows.
・ From the outside of the packaging bag
Polyethylene terephthalate film (thickness 12 μm) + inorganic compound gas barrier layer / adhesive layer / polyamide film (thickness 15 μm) / adhesive layer / unstretched polypropylene film layer (thickness 60 μm).
-The chuck tape was sealed and attached to the inside of the flap in the example and the inside of the packaging bag in the comparative example.

The material of each layer is as follows.
Polyethylene terephthalate film / Inorganic compound gas barrier layer: Gas barrier film (GL-ARH manufactured by Toppan Printing Co., Ltd.)
Polyamide film: ONMB-RT manufactured by Unitika Ltd.
Unstretched polypropylene film: ZK207 manufactured by Toray Film Processing Co., Ltd.
Adhesive layer (dry lamination): Main agent / curing agent = Mitsui Chemicals, Inc. A626 / A50 = 8/1 Coating amount 3.5 g / m ² (dry)
Chuck tape: Polypropylene (including ethylene-propylene copolymer).

The form of the packaging bag is as follows.
FIG. 6 is a schematic plan view for explaining the configuration of an embodiment of the packaging bag according to the present invention.

The example shown in FIG. 6 is referred to as A type. This shape is within the range specified in the present invention, and the dimensions and the like are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Bottom film one way: 35-45 mm (3 levels)
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.

FIG. 7 is a schematic plan view for explaining the configuration of a comparative example of the packaging bag according to the present invention.

The example shown in FIG. 7 is B type. However, the shape of the B type deviates from the range specified in the present invention and is used as a comparative example.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Bottom film one way: 35-45 mm (3 levels)
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.

The evaluation items, evaluation methods, and evaluation criteria are as follows.
First, as evaluation 1, the following two items were evaluated.

1. 1. An automatic filling machine was used to fill the packaging bag for aptitude evaluation with "Fuwatama (registered trademark) containing omelet bacon made in a microwave oven made by Nichiham" using an automatic filling machine.
As the automatic filling machine, TT-9CW3 manufactured by Toyo Automatic Machinery was used.
The evaluation standard is 〇 evaluation when there is no error in the sample of n = 50. If there was even one error, it was evaluated as x.

2. 2. After cooking in the microwave, the chuck tape of the self-supporting flap was opened, and an egg solution containing two M-sized raw eggs was added and mixed by stirring.
Subsequently, the packaging bag was placed in a microwave oven in an upright state and cooked by heating.
The heating conditions were 500 W, 4 minutes and 30 seconds, and the microwave oven used was a turntable type: MM720CUKN2 GY manufactured by Nitori. As for the evaluation, in the sample of n = 10, the one in which the independence was maintained was evaluated as 0, and the case where even one collapsed was evaluated as ×.

Next, as evaluation 2, the following two items were evaluated in the packaging bag of the embodiment of Example 2.

3. 3. A type A packaging bag shown in FIG. 6 was prepared as a packaging bag for evaluating steaming suitability, the levels of the fitting strength in the chuck and the overhanging seal strength were changed, and cooking was performed to evaluate the steaming suitability.
The packaging bag was placed upright in a microwave oven and cooked.
The heating conditions were 500 W, 4 minutes and 30 seconds, and the microwave oven used was a turntable type: MM720CUKN2 GY manufactured by Nitori. As for the evaluation criteria, those that were steamed from the overhanging seal part were evaluated as 〇, and those that were steamed from other parts were evaluated as ×.

4. Drop resistance Evaluation was made by dropping the contents for cooking with the contents filled.
The conditions for dropping were evaluated by observing the presence or absence of damage and the state of dropping 10 times at a height of 120 cm.
The evaluation criteria were 0 for those with no damage to the overhanging seal and chuck tape, and × for those with confirmed damage.

First, Evaluation 1 (1. suitability for automatic filling machine and 2. independence after cooking in a microwave oven) was performed using Examples 1 to 3 and Comparative Examples 1 to 3.

<Example 1>
A packaging bag having the A type shape shown in FIG. 6 was created.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the bottom film one way: 35 mm.

<Example 2>
A packaging bag having the A type shape shown in FIG. 6 was created.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the bottom film one way: 40 mm.

<Example 3>
A packaging bag having the A type shape shown in FIG. 6 was created.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the bottom film one way: 45 mm.

<Comparative Example 1>
A B-type packaging bag shown in FIG. 7 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the bottom film one way: 35 mm.

<Comparative Example 2>
A B-type packaging bag shown in FIG. 7 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the bottom film one way: 40 mm.

<Comparative Example 3>
A B-type packaging bag shown in FIG. 7 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the bottom film one way: 45 mm.

First, Table 1 shows the evaluation results for Evaluation 1 using Examples 1 to 3 and Comparative Examples 1 to 3.

As is clear from the results shown in Table 1, in Examples 1 to 3 of the packaging bag according to the present invention, both the aptitude of the automatic filling machine and the independence after cooking in the microwave oven, which are the evaluation items, were evaluated as 〇. , It shows that both of them are more stable and possible.

That is, the suitability of the automatic filling machine depends on the opening width or opening area of the filling opening, and the independence after cooking in the other microwave oven depends on the area of the bottom surface. Each can be designed independently.

Therefore, the opening width of the opening can be set to the full length in the width direction of the packaging bag, and the folding length of the bottom tape at the bottom can be sufficiently taken, so that it is suitable for an automatic filling machine and is self-supporting after cooking in a microwave oven. It is possible to achieve both sexuality in a stable manner.

On the other hand, in Comparative Examples 1 to 3, which are packaging bags not according to the present invention, the suitability of the automatic filling machine may be evaluated as x, and the suitability of the automatic filling machine and the independence after cooking in the microwave oven. It shows that the compatibility is not stable.

That is, as described above, the suitability of the automatic filling machine depends on the processing width or opening area of the filling opening, and the independence after cooking in the other microwave oven depends on the area of the bottom surface. Since the two are in a trade-off relationship in terms of shape, it is difficult to achieve a stable balance between suitability for an automatic filling machine and independence after cooking in a microwave oven.

Next, Evaluation 2 (3. Steamability and 4. Drop resistance) was performed using Examples 4 to 12.

<Example 4>
A packaging bag having the A type shape shown in FIG. 6 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Bottom film one way: 40 mm.
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
The inner fitting strength of the chuck tape (46) is 30 N / 15 mm, which corresponds to 60% of the side end portion (6).
Further, the seal strength of the overhanging seal portion (9) is 20 N / 15 mm, which corresponds to 40% of the seal strength of the side end portion (6).

<Example 5>
A packaging bag having the A type shape shown in FIG. 6 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Bottom film one way: 40 mm.
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the inner fitting strength of the chuck tape (46) was set to 30 N / 15 mm. This corresponds to 60% of the side end (6).
The seal strength of the overhanging seal portion (9) was set to 30 N / 15 mm. This corresponds to 60% of the sealing strength of the side end portion (6).

<Example 6>
A packaging bag having the A type shape shown in FIG. 6 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Bottom film one way: 40 mm.
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
The inner fitting strength of the chuck tape (46) was set to 30 N / 15 mm. This corresponds to 60% of the side end (6).
The seal strength of the overhanging seal portion (9) was set to 20 N / 15 mm. This corresponds to 80% of the sealing strength of the side end portion (6).

<Example 7>
A packaging bag having the A type shape shown in FIG. 6 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Bottom film one way: 40 mm.
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the inner fitting strength of the chuck tape (46) was set to 35 N / 15 mm. This corresponds to 70% of the side end (6).
The seal strength of the overhanging seal portion (9) was set to 20 N / 15 mm. This corresponds to 40% of the sealing strength of the side end portion (6).

<Example 8>
A packaging bag having the A type shape shown in FIG. 6 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Bottom film one way: 40 mm.
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
The inner fitting strength of the chuck tape (46) was 35 N / 15 mm. This corresponds to 70% of the side end (6).
The seal strength of the overhanging seal portion (9) was set to 30 N / 15 mm. This corresponds to 60% of the sealing strength of the side end portion (6).

<Example 9>
A packaging bag having the A type shape shown in FIG. 6 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Bottom film one way: 40 mm.
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the inner fitting strength of the chuck tape (46) was set to 35 N / 15 mm. This corresponds to 70% of the side end (6).
The seal strength of the overhanging seal portion (9) was set to 40 N / 15 mm. This corresponds to 80% of the sealing strength of the side end portion (6).

<Example 10>
A packaging bag having the A type shape shown in FIG. 6 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Bottom film one way: 40 mm.
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the inner fitting strength of the chuck tape (46) was set to 40 N / 15 mm. This corresponds to 80% of the side end (6).
The seal strength of the overhanging seal portion (9) was set to 20 N / 15 mm. This corresponds to 40% of the sealing strength of the side end portion (6).

<Example 11>
A packaging bag having the A type shape shown in FIG. 6 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Bottom film one way: 40 mm.
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the inner fitting strength of the chuck tape (46) was set to 40 N / 15 mm. This corresponds to 80% of the side end (6).
The seal strength of the overhanging seal portion (9) was set to 30 N / 15 mm. This corresponds to 60% of the sealing strength of the side end portion (6).

<Example 12>
A packaging bag having the A type shape shown in FIG. 6 was created.
The dimensions etc. are as follows.
Top and bottom: 170 mm
Left and right: 170 mm
Flap one way: 20mm
Bottom film one way: 40 mm.
Each seal width: 10 mm
Seal strength of side end (6): 50N / 15mm
And said.
In particular, the inner fitting strength of the chuck tape (46) was set to 40 N / 15 mm. This corresponds to 80% of the side end (6).
The seal strength of the overhanging seal portion (9) was set to 40 N / 15 mm. This corresponds to 80% of the sealing strength of the side end portion (6).

Next, Table 2 shows the evaluation results for evaluation 2 using Examples 4 to 12.

As is clear from the results shown in Table 2, in Examples 4 to 12 of the packaging bag (100) according to the present invention, both the aptitude for steaming and the drop resistance, which are the evaluation items, were evaluated as 〇. It shows that both are more stable and possible.

Generally, in order to improve the steamability, a part of the packaging bag (100) is provided with a vulnerable part against an increase in internal pressure, for example, a weak seal part, and the seal part is peeled off when the internal pressure exceeds a certain level. The water vapor inside the packaging bag is intentionally provided so as to be discharged to the outside of the packaging bag, and in the present invention, the overhanging seal portion (9) corresponds to this.

On the other hand, such a mechanism allows the seal portion to be peeled off and the chuck tape to be fitted even when a sudden change in the internal pressure occurs due to an increase in the internal pressure due to other factors, for example, a drop impact of the packaging bag (100). There is a risk of releasing the part, and it is desirable to be able to stably achieve both the steamability and drop resistance.

That is, according to the evaluation 2, in the A type-shaped packaging bag (100) according to the present invention, the inner fitting strength is 60% or more of the sealing strength of the side end portion, and the inside of the packaging bag body is inward. When the seal strength of the overhanging seal portion is in the range of 40% to 80% of the seal strength of the side end portion, it is possible to more stably realize both the steamability and the drop resistance. I was able to confirm that there was.

In this way, it has the machine filling suitability corresponding to the general-purpose automatic filling machine, which is the subject of the present invention, has self-sustaining nature, and is equipped with an automatic steam bleeding mechanism by a microwave oven. It was possible to verify that it is possible to provide a packaging bag (100) with a zipper tape that can be cooked.

1 ... Sealant layer 2 ... Fitting part 3 ... Flap height position 4 ... Unsealed part 5 ... Side end part 6 ... Sealing part 7 ... Sealing part 8 ...・ ・ Upper side 9 ・ ・ ・ Overhanging seal part 10 ・ ・ ・ Front side body part 11 ・ ・ ・ Corner part 12 ・ ・ ・ Notch 13 ・ ・ ・ Scheduled opening line 14 ・ ・ ・ Bottom film 15 ・ ・ ・ Folding line 16 ... Notch 20 ... Rear body 30 ... Body 40 ... Flap 41 ... Tip 42 ... Seal 43 ... Seal 44 ... Side end 45 ... Flap opening scheduled line 46 ... Chuck tape 47 ... Watertight joint 48 ... Flap back film 49 ... Flap front film 50 ... Bottom 100 ... Packaging bag A ... Center line

Claims (4)

It is a packaging bag made of a film with a sealant layer and capable of cooking the contents in a microwave oven.
The packaging bag has a space inside that can store the contents, and is composed of a front body, a rear body, a bottom, and a flap.
The front torso and the back torso are sealed at the left and right side edges.
A part of the seal on the side end is a seal part that overhangs the inside of the packaging bag body instead of the seal on the side end.
The upper side of the body part becomes an opening for filling the machine, which enables filling of the contents, and after filling, the front side body part and the rear side body part are sealed, and the packaging bag can be sealed.
Below the seal on the upper side, there is a planned opening line for the body in the width direction.
At the bottom of the torso, between the anterior torso and the back torso, a bottom film is extensiblely folded and sealed to form the bottom.
This bottom allows the packaging bag to stand on its own,
At the top of the front torso, there is a flap that protrudes diagonally upward from the torso.
The flap consists of a flap rear film that is continuous from above the packaging bag beyond the height position of the flap, and a flap front film that is continuous from the bottom of the packaging bag beyond the height position of the branch. Together, the side edges of the flaps are sealed and the tips of the flaps are closed and formed by sealing or folding.
The flaps are in order from the tip.
There is a planned opening line for the flap in the width direction,
Next, there is an opening / closing part in the width direction with a chuck tape.
Further, a watertight joint portion is provided in the width direction inside the fitting portion of the chuck tape.
The watertight joint is a packaging bag characterized by separating the fitting portion of the chuck tape and the content storage space of the packaging bag. The watertight joint is formed by either joining the pedestals of the opposing chuck tapes, joining the pedestals of one chuck tape to the sealant layer of the flap facing each other, or joining the sealant layers of the opposing flaps to each other. The packaging bag according to claim 1, wherein the packaging bag is characterized by the above. In the chuck tape, the cross section of the fitting portion perpendicular to the longitudinal direction is vertically asymmetric with respect to the center line, and the inner fitting strength from the content side of the flap and the outer fitting from the tip side of the flap are used. The first or second aspect, wherein the strength is inner fitting strength> outer fitting strength, and the inner fitting strength is 60% or more of the sealing strength of the side end portion. Packaging bag. Any of claims 1 to 3, wherein the sealing strength of the overhanging seal portion to the inside of the packaging bag body is a strength in the range of 40% to 80% of the sealing strength of the side end portion. The packaging bag described in.

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