JP2021120274A - Packaging bag - Google Patents

Abstract

To provide a packaging bag which has a self-standing property, which can perform bagging work more stably and smoothly, and which has re-sealability after opened once, in the packaging bag which has a plastic film as a base material.SOLUTION: A packaging bag comprises a body part, a bottom part and a branch. At a front side body part, the branch is formed having a tip part from the front side body part and projecting. A peripheral edge part of the branch is sealed in an airtight manner, and can serve as a pouring port. At a seal part of an upper end part, a resealing member is provided which can be cut and separated from the seal part of the upper end part. An unsealed part is provided at one part, and this unsealed part enters inside from the end part of the resealing member. The seal part has a concave shape. By fitting the unsealed portion of the resealing member in the opened pouring port so as to cover it, resealing after opening of the packaging bag is possible.SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging bag. In particular, it is a packaging bag made of a laminated body having a sealant layer on a plastic film as a base material, and has self-supporting properties. A packaging bag that can be used, for example, as a refill packaging bag.

The packaging bag can be designed not only when it is composed of a single layer of plastic film, but also as a laminate with other plastic films, resin layers, metal foils, etc., according to the required quality of the contents. One of its features is that it is widely used for various purposes. In addition, it is often more advantageous than glass bottles and cans in terms of both performance and cost.

For example, it is widely used for beverages and foods, and is preferably used for paste-like foods as well as liquids. In some cases, it is used as a seasoning such as miso. For example, it is not limited to beverages such as cooking oil, sauces and coffee beverages, and foods, but also toiletry products such as liquid detergents and softeners, and industrial products such as engine oil. If it is a liquid or paste-like content, it can be easily filled and stored in a packaging bag, and it can also be excellent in storage stability depending on the application.

Especially recently, there has been a growing movement to stop throwing away plastic and glass bottles. In addition to cost, from the viewpoint of environmental protection, there is a remarkable movement to reduce waste by using refill containers.

For example, a liquid packaging bag based on a plastic film and having a sealant layer is highly flexible and can be folded flat to reduce its volume before filling or after pouring the contents. It is possible. It is also possible to incinerate it as waste after it has been used.

Against the background of such advantages, the demand for packaging bags made of a laminate having a sealant layer on a plastic film as a base material has been particularly increasing in recent years.

On the other hand, due to its flexibility, there is also a problem that the independence of the container is not sufficient, and improvement measures are required.

In addition, as for opening, easy opening is required, and at the same time, resealing is required in order to improve convenience.

On the other hand, conventionally, for example, a spout is attached to a packaging bag to improve ease of removal and resealability.

However, in order to attach the spout, there are problems such as a material cost and an increase in the manufacturing process because the spout is generally composed of a separate member.

In addition, when used as a refill container, which has been put to practical use in detergents and shampoos, the purpose is to save resources and reduce waste. Not welcome.

Patent Document 1 proposes to stabilize the pouring by providing a branch in a part of the body and arranging the spout in the center, but it does not take resealability into consideration and is self-supporting. I couldn't say that it was enough.

In addition, the structure of the packaging bag spout proposed here is intended only to open the spout well when the spout is inserted into the container to be refilled, and is not necessarily poured out from the opening operation. , And the ease and stability of the entire series of refilling operations, including refilling, were not intended.

In general, the base of the spout is located at the same height as the filling port of the contents or at a position below the filling port of the contents due to problems of allocation efficiency in packaging bag manufacturing, filling suitability, and outlet blockage at the time of refilling. Provided.

That is, the base of the spout has little freedom in the installation location, and when the tip of the spout is cut off to provide an opening at the beginning of refilling work, the distance from the spout to the root is only the cut amount. It was inevitable that it would be shortened.

Therefore, at the time of refilling, the weight of the contents could not be withstood and the spout may pop out from the mouth of the container to be refilled or the contents may spill out. Alternatively, even if the mouth of the container to be refilled is small, it is difficult to insert the container, which may hinder the refilling work.

JP-A-2019-51946

The present invention has been made in view of such a situation, and in a packaging bag based on a plastic film, the packaging bag has independence, can perform pouring and refilling operations more stably and smoothly, and can be performed smoothly. It is intended to provide a packaging bag that can be resealed once it has been opened.

The invention according to claim 1 is a means for solving the above problems.
A packaging bag having a spout, which is made of a laminate having a sealant layer as a base material of a plastic film.
The packaging bag consists of a body, a bottom, and a branch.
The torso is composed of an anterior torso and a rear torso, and the left and right ends are sealed.
At the bottom of the torso, a bottom plate is sealed between the anterior torso and the rear torso to form an expandably sealed bottom.
The upper end of the body is a filling port, which is sealed after filling the contents to form a sealing part at the upper end.
The anterior torso is formed with a branch extending from the anterior torso with a tip.
The branch is the boundary between the branch and the front fuselage, and the laminate that is continuous from above the front fuselage and the laminate that is continuous from below the front fuselage overlap so that it can be folded back toward the upper or lower side of the front fuselage. , The perimeter of the branch is sealed and sealed,
A planned opening line for cutting is provided at the tip portion, and an opening can be formed at the branch by cutting the tip portion to serve as a spout.
The seal portion at the upper end portion has a resealing member that can be separated from the seal portion at the upper end portion.
The resealing member has an unsealed portion in part, and the unsealed portion enters inward from the end portion of the resealing member, and the sealed portion has a concave shape.
It is a packaging bag characterized in that an unsealed portion of a resealing member is fitted and covered with an opened spout, and the packaging bag can be resealed after being opened.

Further, the invention according to claim 2 is
The seal portion of the resealing member is provided with a mooring hook in which the sealed portion projects from the unsealed portion at the entrance of the unsealed portion that has entered the inside from the end portion of the resealing member to form a spout. The packaging bag according to claim 1, wherein the seal portion on the peripheral edge portion of the branch is provided with a notch that engages with the mooring hook on either one or both of the left and right seal portions. Is.

Further, the invention according to claim 3 is
The packaging bag according to claim 2, wherein a folding line is provided between the opening of the spout and the notch in the width direction of the spout.

Further, the invention according to claim 4 is
The packaging bag according to claim 3, wherein the folded line is a laminated body forming a spout that has been subjected to a half-cut process.

Further, the invention according to claim 5 is
When the width of the entrance of the unsealed portion of the detachable resealing member is A, the relationship between the width B of the spout formed by cutting off the tip portion at the planned opening line and the length C of the folding line. Is the following relationship A> C ≧ B
The packaging bag according to claim 3 or 4, wherein the packaging bag satisfies the above.

Further, the invention according to claim 6 is
In the sealed portion of the resealing member, the width of the end portion of the unsealed portion that has entered the inside from the end portion of the resealing member is smaller than the maximum width inside the unsealed portion, and the spout is the spout. The packaging bag according to claim 1, wherein the packaging bag has a constriction inside the end portion from which the tip portion has been cut off.

Further, the invention according to claim 7 is
When the width of the end of the spout with the tip cut off is G, the minimum width H of the constriction, the width F of the end of the unsealed part of the resealing member, and the innermost part of the unsealed part. The relationship with E is as follows: H ≤ F <G <E
The packaging bag according to claim 6, wherein the packaging bag is characterized in that the above is satisfied.

Further, the invention according to claim 8 is
In the seal portion of the upper end portion, the resealing member is arranged in the center of the seal portion of the upper end portion, the resealing member is separated, and then the seal portion of the upper end portion is formed from the portion in contact with the resealing member. Fold the two left and right self-supporting auxiliary parts strong materials formed by making cuts that do not reach both the left and right ends in the width direction of the packaging bag so that the back side trunks of the packaging bag face each other, and then fold the back. Claims 1 to 1, which are characterized in that it is possible to reinforce the independence of the packaging bag by inserting it into the slits provided in the left and right seal portions of the bottom portion of the side body portion to fix the body portion folded in half. Item 2. The packaging bag according to any one of Item 7.

Further, the invention according to claim 9 is
The packaging bag according to any one of claims 1 to 8, wherein the laminated body includes a gas barrier layer.

According to the present invention, in a packaging bag based on a plastic film, the packaging bag has self-supporting property, the spout can be easily opened, the refilling work can be performed more stably and smoothly, and once opened. It is possible to provide a packaging bag that also has the resealability of the above.

At the bottom of the torso, a bottom plate is sealed between the anterior torso and the back torso to form an expandably sealed bottom, which allows the packaging bag to be self-supporting.

Further, the front body portion is formed with a branch that has a tip portion and projects from the front body portion, and a laminated body that is continuous from above the front body portion and a laminated body that is continuous from below the front body portion overlap. Therefore, since the peripheral edge of the branch can be sealed and sealed to serve as a spout, stable refilling work is possible.

Further, the seal portion at the upper end has a resealing member that can be separated from the seal portion at the upper end, and this resealing member has a partially unsealed portion. The unsealed portion can be resealed after opening the packaging bag by fitting it into the opened spout and covering it.

As described above, since the resealing member can be easily resealed, repeated pouring and resealing are possible, and the contents can be used without waste. In addition, as a waste countermeasure, it is possible to use an environment-friendly packaging bag, for example, it is possible to prevent leakage at the time of disposal.

In particular, according to the invention of claim 2, the seal portion of the resealing member is moored at the entrance of the unsealed portion that has entered the inside from the end portion of the resealing member so that the sealed portion projects over the unsealed portion. The hook is provided, and the seal portion at the peripheral edge of the branch forming the spout is provided with a notch that engages with the mooring hook on either or both of the left and right seal portions. The position of the resealed member can be moored by the mooring hook, which is effective in improving the resealing retention.

Further, in particular, according to the invention of claim 3, the resealed spout is provided with a folding line provided in the width direction of the spout between the opening of the spout and the notch. It is effective in improving the airtightness.

Further, in particular, according to the invention of claim 4, the folded-back line is formed by applying a half-cut process to the laminate forming the spout, so that the folded-back operation can be easily and surely performed. Can be done.

Further, in particular, according to the method of claim 5, when the width of the entrance of the unsealed portion of the detachable resealing member is A, the width of the spout formed by cutting off the tip portion along the planned opening line. The relationship between B and the length C of the folding line is as follows: A> C ≧ B
In this case, in resealing after opening the packaging bag,
It is possible to make the resealing member easier and more stable to attach to the spout.

Further, after resealing, the notch engages with the mooring hook of the resealing member, the resealing member can be easily moored, and repeated opening and closing can be easily performed.

Further, according to the invention of claim 6, according to another embodiment of the packaging bag according to the present invention, the packaging bag based on a plastic film has independence and more stable refilling work. It is possible to provide a packaging bag that can be smoothly carried out and that can be resealed once opened.

Further, according to the invention of claim 7, when the width of the end portion of the spout having the tip portion cut off is G, the minimum width H of the constriction and the end of the unsealed portion of the resealing member The relationship between the width F of the portion and the maximum width E inside the unsealed portion is as follows: H ≦ F <G <E
In this case, when the packaging bag is resealed after opening, the resealing member can be more easily and stably attached to the spout.

In addition, after resealing, the constriction engages with the narrowed part of the unsealed part of the resealing member, and the resealing member can be easily moored to the spout, and repeated opening and closing is easy and stable. Can be done.

Further, according to the invention of claim 8, in the seal portion at the upper end portion, the resealing member is arranged at the center of the seal portion at the upper end portion, the resealing member is separated, and then the resealing member is separated. Two left and right self-reinforcing members formed by making cuts that do not reach both the left and right ends in the width direction of the seal part at the upper end from the part that was in contact with the packaging bag. It is possible to reinforce the independence of the packaging bag by folding it in half so that it faces each other and then inserting it into the slits provided in the left and right seals on the bottom of the rear body to fix the folded body. Is.

Further, according to the invention of claim 9, by including the gas barrier layer in the laminated body, it is effective to improve the storage stability of the contents and prevent the contents from being changed due to the influence from the storage environment. be.

FIG. 1 is a schematic plan view for explaining a basic configuration of a packaging bag according to the present invention. FIG. 2 is a schematic plan view for explaining one embodiment of the packaging bag according to the present invention. Further, it is a plan schematic diagram for demonstrating Example 1 to Example 5. FIG. 3 is a schematic partial plan view for explaining the dimensional relationship related to the resealing of one embodiment of the packaging bag according to the present invention. Further, it is a partial plan schematic diagram for demonstrating Example 1 to Example 5. FIG. 4 is a schematic plan view for explaining another embodiment of the packaging bag according to the present invention. Further, it is a plan schematic diagram for demonstrating Example 6 to Example 11. FIG. 5 is a schematic partial plan view for explaining the dimensional relationship related to the resealing of another embodiment of the packaging bag according to the present invention. Further, it is a partial plan schematic diagram for demonstrating Example 6 to Example 11. FIG. 6 is a schematic perspective view for explaining a mechanism for reinforcing self-reliance by using a self-supporting reinforcing member in one embodiment shown in FIG. 2 of the packaging bag according to the present invention. FIG. 7 is a schematic perspective view for explaining a state in which the upper half of the body portion is folded back to open the spout in one embodiment shown in FIG. 2 of the packaging bag according to the present invention. .. FIG. 8 is for explaining a state in which the upper half of the body is folded back to open the spout and then the spout is resealed in the embodiment shown in FIG. 2 of the packaging bag according to the present invention. It is a perspective schematic diagram. FIG. 9 is for explaining a state in which the upper half of the body portion is folded back to open the spout and then the spout is resealed in another embodiment shown in FIG. 4 of the packaging bag according to the present invention. , It is a perspective schematic diagram.

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 specified by the claims.

FIG. 1 is a schematic plan view for explaining a basic configuration of a packaging bag according to the present invention.

The present invention is composed of a laminate having a sealant layer on a plastic film as a base material. Further, it is a packaging bag having a spout (22), for example, a packaging bag (100) capable of transferring liquid contents from the spout (22) to a container to be refilled.

The packaging bag having the spout (22) is composed of a body (1), a bottom (4), and a branch (20), of which the body (1) is the front body (2). It is composed of a rear body portion (3) and the left and right side end portions (7) are sealed. However, in FIG. 1, the rear body portion (3) is behind the front body portion (2) and is invisible.

Further, in the lower part of the body portion (1), the bottom plate (5) is sealed between the front side body portion (2) and the rear side body portion (3) to form an expandably sealed bottom portion (4). The bag (100) is self-supporting due to the expanded bottom (4) by filling the contents.

Further, the bottom plate (5) is also made of a laminate having a sealant layer using a plastic film as a base material, like the laminate constituting the body (1), and the front body (2) and the rear body (3). It is folded back and sealed so as to face the sealant layer of.

The upper end portion (6) of the body portion is a filling port, and is sealed after filling the contents. By the seal of the upper end portion (6) of the body portion, the seal portion (8) of the upper end portion is formed, and the packaging bag (100) is sealed.

The seal portion (8) at the upper end is provided with a resealing member (10) that can be separated from the seal portion (8) at the upper end by a cutting line (11). That is, the shape of the outer circumference of the resealing member (10) can be formed by the cut line (11). In FIG. 1, the resealing member (10) has already been cut along the cutting line (11) and separated from the main body of the packaging bag (100) to show a separated state.

Further, the front body portion (2) is formed with a branch (20) having a tip portion (23) and projecting from the front body portion (2), and the branch (20) is a branch (20). At the boundary (21) between the front side body portion (2) and the front side body portion (2), it can be folded back toward the upper side or the lower side of the front side body portion (2). FIG. 1 shows a state in which the product is folded upward.

In the branch (20), the laminated body continuous from above the front body portion (2) and the laminated body continuous from below the front body portion (2) are overlapped, and the peripheral edge portion of the branch (20) is sealed, and the seal portion (20) is sealed. 26) is formed and sealed.

Further, the tip portion (23) of the branch (20) is provided with an planned opening line (24) for cutting and opening the packaging bag (100), and the tip portion (24) is provided along the planned opening line (24). An opening (28) can be formed in the branch (20) by cutting out the 23) to form a spout (22).

The planned opening line (24) indicates the cutting position for opening, and may be a method of tearing and opening with a knife such as scissors, or when the planned opening line (24) itself is a fragile part. For example, it is possible to use an easy-opening method that can be torn by fingers.

By having the spout (20) in this position, i.e. in the central portion in the width direction, when used as a refillable packaging bag, for example, as compared to when the spout (20) is on the shoulder of the packaging bag. , It is easy to balance at the time of refilling, and the refilling work can be performed more stably and smoothly.

Further, it is easy to apply pressure when squeezing out the contents, and the refilling work can be performed in a shorter time.

The seal portion (8) at the upper end is provided with a resealing member (10) that can be separated from the seal portion (8) at the upper end. The resealing member (10) has a partially unsealed portion (9), and the unsealed portion (9) penetrates inward from the end portion of the resealing member (10). The seal portion (18) of the resealing member (10) has a concave shape.

This concave shape is a shape in which the sealed portion (18) surrounds the unsealed portion (9) from three sides, and the resealing member (10) is separated from the sealed portion (8) at the upper end. The state is shown in the upper left of FIG. The separated resealing member (10) has an unsealed portion (9), a sealed portion (18), and an inlet (19) of the unsealed portion (9).

In the packaging bag (100) according to the present invention, after the resealing member (10) is separated from the sealed portion (8) at the upper end, the inlet (19) of the unsealed portion (9) is opened (19). It is possible to reseal after opening the packaging bag (100) by fitting it into 22) and covering it.

As described above, in the packaging bag (100) according to the present invention, since the resealing member (10) can be easily resealed, the contents can be repeatedly poured out and resealed. , The contents can be used without waste.

In addition, as a measure against waste after use, it is possible to make an environment-friendly packaging bag, for example, it is possible to prevent leakage of contents at the time of disposal by resealing.

FIG. 2 is a schematic plan view for explaining one embodiment of the packaging bag according to the present invention. Further, it is a plan schematic diagram for demonstrating Example 1 to Example 5.

In the example of one embodiment shown in FIG. 2, the resealing member (10) is arranged at the center of the upper end sealing portion (8), and on the left and right sides thereof, the self-supporting reinforcing member (14) and the self-supporting reinforcing member (14). This is an example in which a self-supporting reinforcing member (15) is arranged and separated by a cutting line (11) and a cutting line (13) to form each member. As described above, the resealing member (10) can be separated from the sealing portion (8) at the upper end and separated from the packaging bag (100).

The self-supporting reinforcing member (14) and the self-supporting reinforcing member (15) are separated from each other at the cut line (13), but remain continuously at the left and right side end portions (7) at the upper end portion (6) of the body portion. do.

The self-supporting reinforcing member (14) and the self-supporting reinforcing member (15) can be inserted into the slits (16) and the slits (17) to help the packaging bag (100) to stand on its own. The functions and roles of the self-supporting reinforcing member (14) and the self-supporting reinforcing member (15) when they are provided in this way will be described later.

In the example shown in FIG. 2, when resealing, it is also possible to fold back at the folding line (27) near the opening (28) of the spout (22) and then reseal, and fold back and reseal. In some cases, it can be resealed with a higher degree of sealing.

As in the example shown in FIG. 2, the folding line (27) can be provided in the width direction between the opening (28) and the notch (25) of the spout (22). Further, the folded line (27) can be formed by, for example, half-cut processing on the laminated body. As a result, the folding work can be easily and accurately performed.

An object of the present invention is that a packaging bag based on a plastic film has self-sustaining property, can be poured out and refilled more stably and smoothly, and is once opened. It is intended to provide a packaging bag (100) having a later resealability, and the realization thereof can be achieved in this way.

Further, in one embodiment shown in FIG. 2, the seal portion (26) at the peripheral edge of the branch (20) forming the spout (22) has one or both of the left and right seal portions (26). Can be provided with a notch (25).

In this case, the resealing member (10) covered with the spout (22) can be moored, and in one embodiment shown in FIG. 2, the notch (25) is sealed on both the left and right sides. This is an example provided in the part (26).

This notch (25) engages with the mooring hook (12) of the resealing member (10) when the opened spout (22) is resealed using the resealing member (10). Therefore, the resealing member (10) can be easily moored.

In the example shown in FIG. 2, the mooring hook (12) is provided at one place and the notch (25) is provided at two places. In this case, the resealing member (10) is turned upside down and covered. Even so, mooring is possible.

The mooring of the resealing member (10) to the spout (22) is not limited to the form shown in FIG. 2, and other forms can be used. Add an explanation about.

FIG. 3 is a schematic partial plan view for explaining the dimensional relationship related to the resealing of one embodiment of the packaging bag according to the present invention. Further, it is a partial plan schematic diagram for demonstrating Example 1 to Example 5.

The branch (20) can be separated and removed by cutting off the tip portion (23) along the planned opening line (24) provided in advance. The planned opening line (24) is provided across the tip of the unsealed portion (29) in the central portion of the branch (20).

Therefore, an opening (28) can be formed in the spout (22) by cutting off the tip (23), and the contents can be poured out by the opening (28).

In the packaging bag (100) according to the present invention, when the width of the entrance of the unsealed portion of the detachable resealing member is A, the spout (22) formed by cutting off the tip portion (23) along the planned opening line. ) Width B and the length C of the folding line (27) are as follows: A> C ≧ B
Can be satisfied.

We have found this relationship in the process of diligently examining the present invention, and in this case, in the resealing after opening the packaging bag (100), the spout of the resealing member (10) (10) It can be easily and stably attached to 22).

After resealing, the notch (25) engages with the mooring hook (12) of the resealing member (10) so that the resealing member (10) can be easily moored and repeatedly opened and closed. Can be easily done. In addition, it has a structure having excellent resealing retention.

FIG. 4 is a schematic plan view for explaining another embodiment of the packaging bag according to the present invention.

In the other embodiment shown in FIG. 4, the shape of the branch (20) and the shape of the resealing member (10) are different from the one embodiment shown in FIG. Along with this, the positional relationship of the planned opening line (24) is also different.

The tip portion (23) of the branch (20) is provided with an planned opening line (24) for cutting, and an opening (28) is formed in the branch (20) by cutting the tip portion (23). The spout (22) can be used as the spout (22) in common with FIG. 2, except that the spout (22) has a constriction (30) inside the opening (28). ..

This is because the shape of the tip portion (23) of the branch (20) and the position of the planned opening line (24) are different from the example shown in FIG.

Along with this, in the example of the other embodiment shown in FIG. 4, the shapes of the unsealed portion (9) and the sealed portion (18) of the resealing member (10) are also different from those in FIG.

In one embodiment shown in FIG. 2, a mooring hook was provided in the unsealed portion of the resealing member (10), but in the other embodiment shown in FIG. 4, it is adjusted to the constriction (30). The width of the entrance of the unsealed portion (9) is narrowed, which enables the resealing member (10) to be moored during resealing.

Also in the example shown in FIG. 4, the self-supporting reinforcing member (14) and the self-supporting reinforcing member (15) can be inserted into the slits (16) and the slits (17) to help the packaging bag (100) to stand on its own. Is. The functions and roles of the self-supporting reinforcing member (14) and the self-supporting reinforcing member (15) when they are provided in this way will be described later.

FIG. 5 is a schematic partial plan view for explaining the dimensional relationship related to the resealing of another embodiment of the packaging bag according to the present invention. Further, it is a partial plan schematic diagram for demonstrating Example 6 to Example 11.

As described above, the branch (20) can be separated and removed by cutting off the tip portion (23) along the planned opening line (24) provided in advance. This planned opening line (24) is
It is provided across the tip of the unsealed portion (29) in the central portion of the branch (20).

Therefore, an opening (28) can be formed in the spout (22) by cutting off the tip (23), and the contents can be poured out by the opening (28).

Further, in the example of the other embodiment shown in FIG. 4, the spout (22) has a constriction (30) inside the opening (28). This indicates that the shape of the tip portion (23) of the branch (20) and the position of the planned opening line (24) are different from the example shown in FIG.

Further, the unsealed portion (9) of the resealing member (10) is not provided with a mooring hook, and instead, the width (F) of the entrance of the unsealed portion (9) is adjusted to fit the constriction (30). Has a narrowed shape. This portion serves as a mooring hook and enables mooring at the tip of the spout (22) of the resealing member (10) in resealing.

In the packaging bag (100) according to the present invention, when the width of the spout (22) formed by cutting off the tip (23) is G, the minimum width H of the constriction (30) and the resealing member (10). ), The width F of the entrance of the unsealed portion and the maximum width E inside the unsealed portion (9) are as follows.
Can be satisfied.

We have found this relationship in the process of diligently examining the present invention, and in this case, in the resealing after opening the packaging bag (100), the spout of the resealing member (10) (10) It can be easily and stably attached to 22).

Further, after resealing, the constriction engages with the narrowed portion of the unsealed portion of the resealing member (10), so that the resealing member (10) can be easily moored and repeatedly opened and closed. Can be done. In addition, it has a structure having excellent resealing retention.

FIG. 6 is a schematic perspective view for explaining a mechanism for reinforcing self-reliance by using a self-supporting reinforcing member in one embodiment shown in FIG. 2 of the packaging bag according to the present invention.

In the packaging bag (100) according to the present invention, the bottom plate (5) is arranged in an expandable manner, and the bottom portion (4) expands depending on the contents to have self-supporting property.

In order to make this independence more stable, an independence reinforcing member (14) and an independence reinforcing member (15) can be used. Although FIG. 6 shows one embodiment shown in FIG. 2, the other embodiment shown in FIG. 4 also uses the self-supporting reinforcing member (14) and the self-supporting reinforcing member (15) in the same manner. Independent reinforcement is possible.

First, the resealing member (10) is separated. Subsequently, a cut line (13) that does not reach the left and right side ends (7) in the width direction of the seal portion (8) at the upper end from the portion that was in contact with the inlet (19) of the resealing member (10). The left and right two self-supporting reinforcing members (14) and the self-supporting reinforcing member (15) formed by the above are made. Since these are formed from cut lines (13) that do not reach the left and right side end portions (7), they remain continuous with the seal portion (8) at the upper end portion at both side end portions (7).

The arrow (31) on the right side of the figure so that the rear body portions (3) of the packaging bag (100) face each other.
After folding in half in the direction, the self-supporting reinforcing member (14) and the self-supporting reinforcing member (15) are provided in the left and right seal portions of the bottom portion (4) of the rear side body portion (3) (16). , And the slit (17) can be inserted and assembled to reinforce the independence of the packaging bag (100). The slit (16) and the slit (17) are shown by a broken line at the bottom (4) in FIG.

Further, in order to fix the state in which the self-supporting reinforcing member (14) and the self-supporting reinforcing member (15) are inserted into the slits (16) and the slits (17) provided in the left and right seal portions, the left and right two rows are fixed. It is also possible to provide slits in the self-supporting reinforcing member (14) and the self-supporting reinforcing member (15). It is a target and is effective for self-reinforcement.

FIG. 7 is a schematic perspective view for explaining a state in which the upper half of the body portion is folded back to open the spout in one embodiment shown in FIG. 2 of the packaging bag according to the present invention. ..

In the state shown in FIG. 7, the packaging bag (100) is self-supporting, and the rear body portions (3) of the packaging bag (100) face each other in the direction of the arrow (31) on the right side of the drawing. As a result of folding, the branch (20) is in a state of protruding upward, and the tip portion (23) of the branch (20) can be separated and removed to open the packaging bag (100). The tip portion (23) can be removed using the planned opening line (24).

When the packaging bag (100) is opened in this self-supporting state, the opening operation can be performed in a more stable state.

After opening the packaging bag (100), the contents can be poured out from the spout. For pouring, the packaging bag (100) can be turned upside down and poured from the mouth of the refillable container.

Further, the unsealed portion (9) of the resealing member (10) can be fitted and covered with the opened spout (22) to reseal after opening.

Further, as described above, the self-supporting reinforcing member (14) and the self-supporting reinforcing member (15) are inserted into the slits (16) and the slits (17) provided in the left and right seal portions, respectively, and are packaged. It is effective in reinforcing the independence of the bag.

Further, it is effective in maintaining independence in the case of repeatedly pouring and resealing the contents, for example, even when the remaining amount of the contents gradually decreases due to pouring.

FIG. 8 is for explaining a state in which the upper half of the body is folded back to open the spout and then the spout is resealed in the embodiment shown in FIG. 2 of the packaging bag according to the present invention. It is a perspective schematic diagram.

In one embodiment of the packaging bag (100) shown in FIG. 2, the sealed portion (18) of the resealing member (10) is an unsealed portion (18) that has entered the inside from the end portion of the resealing member (10). At the entrance of 9), a mooring hook (12) is provided in which the sealed portion (18) overhangs the unsealed portion (9).

Further, the seal portion (26) at the peripheral edge of the branch forming the spout (22) has a notch that engages with the mooring hook (12) in either or both of the left and right seal portions (26). (
25) is provided.

As a result, when the spout (22) is resealed, the resealing can be smoothly performed, and the resealing member (10) is moored to the spout (22) in the resealed state. It is possible to prevent it from falling off.

The resealing also provides a folding line (27) between the opening (28) of the spout (22) and the notch (25) in the width direction of the spout (22) to provide the spout (22). It is also possible to fold back the tip of).

In this case, the effect of folding back is effective in improving the airtightness of the spout (22), that is, the packaging bag (100) at the time of resealing, and the opening (28) is thickened by folding back. In addition, it is also effective in improving resealability.

Further, after the packaging bag (100) is resealed, the notch (25) engages with the mooring hook (12) of the resealing member (10) to easily moor the resealing member (10). And can be easily opened and closed repeatedly.

FIG. 9 is for explaining a state in which the upper half of the body portion is folded back to open the spout and then the spout is resealed in another embodiment shown in FIG. 4 of the packaging bag according to the present invention. , It is a perspective schematic diagram.

As described above, the branch (20) can be separated and removed by cutting off the tip portion (23) along the planned opening line (24) provided in advance. The planned opening line (24) is provided across the tip of the unsealed portion (29) in the central portion of the branch (20).

Therefore, an opening (28) can be formed in the spout (22) by cutting off the tip (23), and the contents can be poured out by the opening (28).

Further, in another embodiment shown in FIG. 4, the spout (22) has a constriction (30) inside the opening (28). This is because the shape of the tip portion (23) of the branch (20) and the position of the planned opening line (24) are different from those of one embodiment shown in FIG.

Further, the unsealed portion (9) of the resealing member (10) is not provided with the mooring hook (12), and instead, the opening of the unsealed portion (9) is provided in accordance with the constriction (30). It has a narrowed shape. Similar to the role of the mooring hook (12), this portion enables mooring at the tip of the spout (22) of the resealing member (10) in resealing.

Further, as described above, in the packaging bag (100) according to the present invention, when the width of the spout formed by cutting off the tip portion (23) is G, the minimum width H of the constriction and the resealing member are not yet formed. The relationship between the width F at the entrance of the sealed portion and the maximum width E inside the unsealed portion is as follows: H ≦ F <G <E
When the packaging bag (100) is resealed after opening, the resealing member (10) can be more easily and stably attached to the spout (22).

Further, after resealing, the constriction (30) engages with the narrowed portion of the unsealed portion (9) of the resealing member (10), and the resealing member (10) can be easily inserted into the spout (22). It can be moored and can be easily opened and closed repeatedly.

Further, the present invention is a packaging bag made of a laminate having a sealant layer on a plastic film as a base material. Further, a gas barrier layer can be provided in the laminated body. Here, the materials constituting the packaging bag will be described.

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 is appropriately selected according to the application.

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 puncture resistance and impact resistance to the laminate.

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. 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.

A metal foil such as aluminum is also effective as a gas barrier layer. In this case, it is also effective for maintaining the bent shape at the bent portion, for example.

In addition, a vapor-deposited plastic film formed by vapor-depositing a metal layer such as aluminum on the surface of the plastic film can also be used as the gas barrier layer.

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 application. 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. 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 deposition layer, an inorganic compound such as silicon oxide or aluminum oxide is 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. Can be done. 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 / water containing at least one of a water-soluble polymer, (a) one or more metal alkoxides or a hydrolyzate thereof, or both, or (b) tin chloride. A coating agent containing an alcohol-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 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 silicon oxide 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.

The sealant layer makes it possible to stack two laminated bodies so that the sealant layers face each other, heat and pressurize the sealant layers, and heat-seal them to adhere them to each other to form a bag in a packaging bag.

Of the thermoplastic resins, polyolefin-based resins are generally used as the material of the sealant layer. Specifically, low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), and linear low-density polyethylene resin. Ethylene-based resins such as (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer, and ethylene-methacrylic acid resin copolymer can be used.

Alternatively, a blend resin of polyethylene and polybutene, a polypropylene resin such as a homopolypropylene resin (PP), a propylene-ethylene random copolymer, a propylene-ethylene block copolymer, or a propylene-α-olefin copolymer should be used. Can be done.

To form the sealant layer, 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 in advance by laminating.

If necessary, a printing layer can be seen from the outside of the packaging bag in a laminate based on a plastic film for the purpose of improving the image of the product, displaying necessary information about the contents, and improving the design. 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 portion without using the printing layer, for example, a printed sticker can be attached to the surface of the packaging bag.

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 the packaging bag (100) using a plastic film as a base material, the packaging bag (100) has independence, and the pouring and refilling operations can be performed more stably and smoothly, and once. It is possible to provide a packaging bag (100) having resealability after opening.

Hereinafter, the present invention will be described in more detail with reference to Examples 1 to 11. However, the present invention is not limited to the examples shown here. The present invention is specified by the claims.

A sample packaging bag was prepared for evaluation.
The prepared materials are as follows.
-Stretched polyamide film (manufactured by Unitika Ltd. ON, thickness 15 μm), which is the base material,
-Polyethylene terephthalate film with thin film deposition as an intermediate layer (13212 thickness 12 μm manufactured by Toray Film Processing Co., Ltd.),
-A sealant film (MZ434 manufactured by Linear Low Density Polyethylene Tamapoli Co., Ltd., thickness 100 μm) was prepared.

A polyethylene terephthalate film with vapor deposition was bonded to the stretched polyamide film with an adhesive (LX500 manufactured by DIC Corporation), and then further bonded to a sealant film to form a laminate.

The laminate was bag-made with a bag-making machine, embossed and laser-processed, then filled with 100 ml of the contents, and the filling port was heat-sealed and sealed.

The structure of the sample is as follows.
Stretched polyamide film (15 μm) / adhesive / polyethylene terephthalate film with vapor deposition (12 μm) / adhesive / sealant film (100 μm)
And said.

The evaluation items are as follows.
-Resealing retention: It was evaluated whether the resealing member and the spout would come off when the resealing member was fitted to each opened sample, resealed, and lifted with the resealing member. The evaluation criteria were evaluated as 〇 ×.
-Independence retention: When each sample was made independent, it was evaluated whether it could maintain the independence state for 1 minute. The evaluation criteria were evaluated as 〇 ×.

Examples 1 to 5 are based on one embodiment shown in FIGS. 2 and 3.
Examples 6 to 11 are based on the other embodiments shown in FIGS. 4 and 5.

Each sample was prepared by changing the width of the spout and the presence or absence of slits (16) and (17).
The contents of the code are as follows.
・ A: Width of the entrance of the unsealed part of the resealing member ・ B: Width of the spout formed by cutting off the tip part ・ C: Length of the folding line ・ E: Maximum width inside the unsealed part ・F: Width of the entrance of the unsealed part of the resealing member ・ G: Width of the spout formed by cutting off the tip part ・ H: Minimum width of the constriction ・ Slit (16) (17): Rear body part ( It refers to the slits (16) and the slits (17) provided in the left and right seal portions of the bottom portion (4) of 3).

<Example 1>
In one embodiment shown in FIGS. 2 and 3.
Spout width: A>C> B
Slits (16) (17): Yes.

<Example 2>
In one embodiment shown in FIGS. 2 and 3.
Spout width: A> C = B
Slits (16) (17): Yes.

<Example 3>
In one embodiment shown in FIGS. 2 and 3.
Spout width: A = C = B
Slits (16) (17): Yes.

<Example 4>
Spout width: B>A> C
Slits (16) (17): Yes.

<Example 5>
In one embodiment shown in FIGS. 2 and 3.
Spout width: A>C> B
Slits (16) (17): None.

<Example 6>
In the other embodiments shown in FIGS. 4 and 5.
Spout width: H = F <G <E
Slits (16) (17): Yes.

<Example 7>
In the other embodiments shown in FIGS. 4 and 5.
Spout width: H <F <G <E
Slits (16) (17): Yes.

<Example 8>
In the other embodiments shown in FIGS. 4 and 5.
Spout width: H = G <F <E
Slits (16) (17): Yes.

<Example 9>
In the other embodiments shown in FIGS. 4 and 5.
Spout width: H <G = F <E
Slits (16) (17): Yes.

<Example 10>
In the other embodiments shown in FIGS. 4 and 5.
Spout width: H = G <F <E
Slits (16) (17): Yes.

<Example 11>
In the other embodiments shown in FIGS. 4 and 5.
Spout width: H = F <G <E
Slits (16) (17): None.

The evaluation results are shown in Table 1.

From the results shown in Table 1, although all of Examples 1 to 11 have resealability and independence, in terms of resealability and independence retention, which are evaluation criteria with certain criteria, It can be seen that there are variations.

That is, in Examples 1 to 5, where the width of the spout satisfies A> C ≧ B, which is one embodiment shown in FIGS. 2 and 3, resealing is performed in Examples 1 and 2. In terms of both retention and self-sustaining retention, it is a good evaluation compared to others.

That is, for Examples 3 and 4, in which the width of the spout does not satisfy A> C ≧ B, resealing is possible, but the result is that there is a difference in the resealing retention property. Is.

Further, in Examples 6 to 11 which are other embodiments shown in FIGS. 4 and 5, the spout width satisfies H ≦ F <G <E, and in Examples 6 and 7, the reappears. In terms of both seal retention and self-sustaining retention, it is a good evaluation compared to others.

That is, with respect to Examples 8 to 10 in which the width of the spout does not satisfy H ≦ F <G <E, resealing is possible, but the result is that there is a difference in the resealing retention property. It is a thing.

Regarding the self-supporting property, in any of the embodiments of the spout (22) and the resealing member (10), slits (slits) provided in the left and right sealing portions of the bottom portion (4) of the rear body portion (3). It is verified from the evaluation results of Examples 5 and 11 that it is more effective to provide the 16) and the slit (17) and insert and assemble the self-supporting reinforcing member to improve the self-supporting retention. Was done.

As described above, we have found these relationships in the process of diligently examining the present invention, and in these cases, the resealing member is more likely to be resealed after the packaging bag (100) is opened. It was verified that the (10) can be easily attached to the spout (22), can be made more stable, and is more superior in maintaining independence.

As described above, according to the present invention, in a packaging bag based on a plastic film, the packaging bag has self-supporting property, can be poured out and refilled more stably and smoothly, and once opened. It was possible to verify that it is possible to provide a packaging bag that also has resealability.

1 ... Body 2 ... Front body 3 ... Rear body 4 ... Bottom 5 ... Bottom plate 6 ... Upper end of body 7 ... Side end 8 ...・ Sealed part 9 at the upper end ・ ・ ・ Unsealed part 10 ・ ・ ・ Resealing member 11 ・ ・ ・ Cutting line 12 ・ ・ ・ Mooring hook 13 ・ ・ ・ Cutting line 14 ・ ・ ・ Self-supporting reinforcing member 15 ・ ・・ Self-supporting reinforcing member 16 ・ ・ ・ Slit 17 ・ ・ ・ Slit 18 ・ ・ ・ Seal part 19 ・ ・ ・ Entrance 20 ・ ・ ・ Branch 21 ・ ・ ・ Boundary 22 ・ ・ ・ Spout 23 ・ ・ ・ Tip part 24 ・・ ・ Scheduled opening line 25 ・ ・ ・ Notch 26 ・ ・ ・ Seal part 27 ・ ・ ・ Folded line 28 ・ ・ ・ Opening 29 ・ ・ ・ Unsealed part 30 ・ ・ ・ Constriction 31 ・ ・ ・ Arrow 100 ・ ・ ・Packaging bag A ... Width of the entrance of the unsealed portion of the resealing member B ... Width of the spout formed by cutting off the tip portion C ... Length of the folding line E ... Unsealed portion Maximum width F ... Width of the entrance of the unsealed part of the resealing member G ... Width of the spout formed by cutting off the tip H ... Minimum width of the constriction

Claims (9)

A packaging bag having a spout, which is made of a laminate having a sealant layer as a base material of a plastic film.
The packaging bag consists of a body, a bottom, and a branch.
The torso is composed of an anterior torso and a rear torso, and the left and right ends are sealed.
At the bottom of the torso, a bottom plate is sealed between the anterior torso and the rear torso to form an expandably sealed bottom.
The upper end of the body is a filling port, which is sealed after filling the contents to form a sealing part at the upper end.
The anterior torso is formed with a branch extending from the anterior torso with a tip.
The branch is the boundary between the branch and the front fuselage, and the laminate that is continuous from above the front fuselage and the laminate that is continuous from below the front fuselage overlap so that it can be folded back toward the upper or lower side of the front fuselage. , The perimeter of the branch is sealed and sealed,
A planned opening line for cutting is provided at the tip portion, and an opening can be formed at the branch by cutting the tip portion to serve as a spout.
The seal portion at the upper end portion has a resealing member that can be separated from the seal portion at the upper end portion.
The resealing member has an unsealed portion in part, and the unsealed portion enters inward from the end portion of the resealing member, and the sealed portion has a concave shape.
A packaging bag characterized in that an unsealed portion of a resealing member is fitted and covered with an opened spout, and the packaging bag can be resealed after being opened. The seal portion of the resealing member is provided with a mooring hook in which the sealed portion projects from the unsealed portion at the entrance of the unsealed portion that has entered the inside from the end portion of the resealing member to form a spout. The packaging bag according to claim 1, wherein the seal portion on the peripheral edge portion of the branch is provided with a notch that engages with the mooring hook on either one or both of the left and right seal portions. .. The packaging bag according to claim 2, wherein a folding line is provided between the opening of the spout and the notch in the width direction of the spout. The packaging bag according to claim 3, wherein the folded line is obtained by applying a half-cut process to a laminate forming a spout. When the width of the entrance of the unsealed portion of the detachable resealing member is A, the relationship between the width B of the spout formed by cutting off the tip portion at the planned opening line and the length C of the folding line. Is the following relationship A> C ≧ B
The packaging bag according to claim 3 or 4, wherein the packaging bag is characterized by satisfying the above. In the sealed portion of the resealing member, the width of the end portion of the unsealed portion that has entered the inside from the end portion of the resealing member is smaller than the maximum width inside the unsealed portion, and the spout is the spout. The packaging bag according to claim 1, wherein the packaging bag has a constriction inside the cut-off end portion. When the width of the spout formed by cutting off the tip is G, the minimum width H of the constriction, the width F of the entrance of the unsealed portion of the resealing member, and the maximum width E inside the unsealed portion. The relationship is as follows: H≤F <G <E
The packaging bag according to claim 6, wherein the packaging bag is characterized by satisfying the above. In the seal portion of the upper end portion, the resealing member is arranged in the center of the seal portion of the upper end portion, the resealing member is separated, and then the seal portion of the upper end portion is formed from the portion in contact with the resealing member. Two left and right self-supporting reinforcing members formed by making cuts that do not reach both left and right ends in the width direction of the packaging bag are folded in half so that the rear body parts of the packaging bag face each other, and then the rear side. Claims 1 to claim that it is possible to reinforce the independence of the packaging bag by inserting it into the slits provided in the left and right seal portions of the bottom portion of the body portion to fix the body portion folded in half. The packaging bag according to any one of 7. The packaging bag according to any one of claims 1 to 8, wherein the laminated body includes a gas barrier layer.

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