JP7020038B2 - Pouch with reclose function - Google Patents

Description

The present invention relates to a pouch made of a laminate based on a plastic film. In particular, the present invention relates to a pouch in which an aseptically filled and sealed pouch is provided with resealability, so-called recloseability.

Conventionally, a pouch made of a laminate based on a plastic film has many advantages such as functionality, economy, and convenience, and has been used in a wide range of applications and fields. For example, in the food field, it is widely used as a container, including retort foods.

Also, in the field of toiletries, in addition to being used as a soft packaging container, its use as a refill container is expanding.

As another field, the medical field is also well established. For example, it may be used as a container for pharmaceuticals such as intravenous drip, as well as a container for liquid foods, and may be used especially for enteral nutrition foods. This is because, in hospitals and the like, when a liquid food such as a nutritional supplement or a pharmaceutical product is administered to a patient, the liquid food may be administered through a tube inserted into the stomach or intestine.

In this case, a diluent (water) or the like is added to the contents stored in the pouch in advance, and the tube is connected to the spout provided below the pouch. Contents such as nutritional supplements and pharmaceuticals are required to be sterile because they are conservative and are administered into the body.

Therefore, in general, the pouch is filled with the contents, sealed, pressed, and sterilized by heating. While this pressurization and heat sterilization can sufficiently sterilize the central part of the contents, the contents of the outer part are excessively heat-treated, resulting in deterioration of the contents, loss of nutrients, or inside the body. Problems such as difficulty in absorption may occur.

Aseptic filling method (aseptic filling method) is performed as a method for obtaining sufficient asepticity without performing such excessive heat treatment. This is a method in which the contents are sterilized with a liquid sterilizer or the like, and the sterilized packaging material is aseptically filled in the sterilized packaging material in a sterile atmosphere and sealed.

Further, in a pouch used for such a purpose, a structure called a plastic linear fastener, as seen in a plastic bag with a zipper, is often used in order to have a reclosing function.

In such a chuck, a convex wire having a bulge like a rail and a concave wire into which the convex portion can be fitted are arranged so as to face each other so that the chuck can be repeatedly opened and closed. However, its structure is fine and has intricate parts.

Therefore, when the pouch is provided with the chuck, the sterilization process is performed with the chuck fitted, so that the intricate portion of the fitted portion of the chuck may be unsterilized. Further, when removing the sterilizing liquid remaining on the packaging material, a part of the sterilizing liquid may remain without being removed.

Further, when the pouch is provided with a chuck, since bag making and filling are performed in separate processes, the number of processes is increased, which is complicated and disadvantageous in terms of cost. If aseptic filling with a chuck and bag making are performed at the same time, the technical difficulty is high, and there are many problems to be solved such as residual hydrogen peroxide in the chuck portion and generation of unsterilized parts.

Patent Document 1 proposes a pouch that can be heated, and although it can be sterilized by heating, recloseability is not considered, and liquid foods such as nutritional supplements and pharmaceuticals are provided to patients in hospitals and the like. It was not suitable for administration.

Japanese Patent No. 4997668

The present invention has been made in view of such a situation, and an object of the present invention is to provide a pouch with a reclosing function, in which an unsterilized portion does not remain or a sterilizing liquid does not remain without providing a chuck on the pouch.

The invention according to claim 1 is a means for solving the above problems.
A pouch with a reclosing function, which is made of a laminate having a sealant layer and a plastic film as a base material.
The two laminated bodies form the front and back body parts, and the sealant layers face each other to seal the peripheral part of the body part.
The bottom side is sealed with a connecting member to the tube that pulls out the contents downwards.
The torso is sealed on both the left and right sides,
The seals on both the left and right sides are wide seals at the upper part of the body, and the wide seals are provided with through holes on each of the left and right sides into which fingers can be inserted.
The wide seal portion is provided with a notch that penetrates the front and back body portions on the upper side and the center side of the pouch so as to surround the through hole continuously from the left and right ends of the pouch.
The upper side is horizontally sealed with the upper side seal part and is sealed.
The upper side seal portion can be cut off and the upper part of the pouch can be opened to form an opening.
Below the upper side seal portion, one or more folding lines are provided in the horizontal direction at intervals.
The left and right ends of the folding line reach the wide sealing portion.
The folding line is folded in order from the top, and the upper part of the body can be folded.
The folds allow the opening formed at the top of the pouch to be reclosed.
It is a pouch with a reclosing function that can fix the folded part by inserting the sealing parts at both left and right ends above the folding line of the first step from the top into the through hole.

The invention according to claim 2 is characterized in that the connecting member with the tube for taking out the contents downward is provided at either the left or right end of the lower side of the pouch body. It is a pouch with a reclose function.

According to the present invention, it is possible to provide a pouch with a reclosing function without providing a chuck on the pouch and without leaving an unsterilized portion or a sterilizing liquid.

In particular, according to the invention of claim 2, in addition to the effect of the invention of claim 1, a connecting member with a tube for taking out the contents downward is provided at either the left or right end of the lower side of the pouch body. By providing the pouch, it is possible to take out the contents more efficiently when the pouch with the reclose function is actually used and the pouch is hung diagonally on a hanger.

FIG. 1 is a schematic plan view for explaining an embodiment of a pouch with a reclosing function according to the present invention. FIG. 2 is a schematic plan view for explaining a state in which the upper seal portion is removed in one embodiment of the pouch with a reclosing function according to the present invention. FIG. 3 is a schematic diagram for explaining a state in which an opening is formed in the upper portion and water is added in one embodiment of the pouch with a reclosing function according to the present invention. FIG. 4 is a schematic plan view for explaining a state before reclosing in one embodiment of a pouch with a reclosing function according to the present invention. FIG. 5 is a schematic plan view for explaining a state in which a first-stage folding line is folded for reclosing in one embodiment of a pouch with a reclosing function according to the present invention. FIG. 6 is a plane for explaining a state in which a second-stage folding line is folded and the first-stage end portion is inserted into a through hole for reclosing in one embodiment of a pouch with a reclosing function according to the present invention. It is a schematic diagram. FIG. 7 shows a state in which the second-stage folding line is folded and the first-stage end portion is inserted into the through hole for reclosing in one embodiment of the pouch with a reclosing function according to the present invention, as viewed from the back surface side of the pouch. It is a plane schematic diagram for demonstrating the state. FIG. 8 is a schematic plan view for explaining another embodiment of the pouch with a reclosing function according to the present invention. FIG. 9 is a schematic plan view for explaining a state in which the pouch with a reclosing function according to the present invention is used by hanging it diagonally in another embodiment.

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 limited by the claims.

FIG. 1 is a schematic plan view for explaining an embodiment of a pouch with a reclosing function according to the present invention.

The pouch (100) with a reclosing function according to the present invention is made of a laminate having a sealant layer using a plastic film as a base material. The laminated body is not shown with the front side body portion (8) and the back side in the drawing, but the two laminated bodies of the back side body portion have the sealant layers facing each other and the body portion. The peripheral part is sealed.

In the example shown in FIG. 1, the peripheral edge portion of the body portion includes an upper side (1), a right side end (15), a left side end (16), and a lower side (9).

The lower side (9) is provided with a connecting member (5) with a tube for taking out the contents downward, and is sealed and sealed by the lower side sealing portion (10).

The left and right ends of the body are sealed, and the right side sealing portion (2) and the left side sealing portion (3) are sealed and sealed, respectively. Further, the seal portions at both left and right ends are wide at the upper part (13) of the body portion, and the wide seal portion (14) is provided with through holes (6) on each of the left and right sides into which fingers can be inserted. There is.

In the wide seal portion (14) of the upper part (13) of the body portion, a notch penetrating the front and back body portions is made continuously from the left and right ends of the pouch on the upper side surrounding the through hole (6) and on the center side of the pouch. (7) is provided.

The upper side (1) is horizontally sealed by the upper seal portion (4), and the upper seal portion (4) can be cut along the planned cutting line (12), and the upper part of the pouch is opened by this cut. It is possible to form an opening.

One or more folding lines (11) are provided horizontally at intervals below the upper side sealing portion (4), and the left and right ends of the folding line (11) reach the wide sealing portion. The folding line is folded in order from the top, and the upper part of the body can be folded.

The upper part (13) of the torso is separated from the left and right ends with the above-mentioned notch (7) as a boundary, and the folding part (17) is sequentially folded from the top with the folding line (11) as a trigger, and the upper part of the pouch ( The opening formed in 13) can be reclosed.

By inserting the seals on both the left and right ends above the folding line (11) into the left and right through holes (6), it is possible to fix the folding part (17) in which the folding line (11) is sequentially folded. be.

As described above, the pouch (100) with a reclosing function according to the present invention can realize the reclosing function without using a chuck which has been generally used in the past, so that an unsterilized portion remains or a sterilizing solution is used. It is possible to realize a pouch (100) with a reclosing function in which there is no risk of residual.

FIG. 2 is a schematic plan view for explaining a state in which the upper seal portion is removed in one embodiment of the pouch with a reclosing function according to the present invention.

In this state, the upper seal portion (4) is cut off at the planned cutting line (12) and separated from the body portion, so that an opening (20) is formed in the upper portion of the pouch (100) with a reclose function. There is.

The cutting is performed along the planned cutting line (12), but there are no particular restrictions on the form and forming method of the planned cutting line (12). For example, a fragile portion by half-cutting may be provided by using a laser beam or a blade, and the fragile portion may be cut by a finger, or may be cut by a blade such as scissors along the planned cutting line (12).

FIG. 3 is a schematic diagram for explaining a state in which an opening is formed in the upper portion and water is added in one embodiment of the pouch with a reclosing function according to the present invention.

In the state shown here, the opening (20) is already formed in the pouch (100) with the reclosing function, and the opening (20) is inside the pouch, and from another external container (27), for example, water (21). It is in a state of pouring and adding water.

The pouch (100) with a reclosing function according to the present invention is not limited to its use, but can be used as a container for enteral nutritional foods that may be used in medical institutions, for example, as described above. Is.

Further, in the above-mentioned asept filling method, the contents are sterilized by a liquid sterilizer or the like, and the sterilized packaging material is aseptically filled in the sterilized packaging material in a sterile atmosphere and sealed and sealed. Chuck is often used.

However, there are problems to be solved such as unsterilized when the chuck is provided and residual sterilizing liquid.

In the present invention, there is no possibility of causing such a problem, and diluted water or the like can be added to and mixed with the contents previously stored in the pouch. That is, by adding water, the contents that have been filled in advance are added with water, and the contents can be administered.

In taking out the watered content (22), it is possible to connect the tube to the connecting member (5) with the tube provided below the pouch and administer the content from the tube.

In the subsequent reclosing, the present invention aims to realize a pouch with a reclosing function, which can impart reclosing property without using a chuck.

FIG. 4 is a schematic plan view for explaining a state before reclosing in one embodiment of a pouch with a reclosing function according to the present invention.

In the state shown here, since the upper seal portion (4) has already been cut along the planned cutting line (12) and separated from the body portion, the opening (20) is above the pouch (100) with a reclose function. Is formed.

In the example shown in FIG. 4, two folding lines, a folding line (11) and a second-stage folding line (18), are provided, both of which are shown in the figure as valley folding lines.

In order to reclose, first, the folding line (11) is folded into a valley, and the first step (23) and the second step (24) of the folding portion are overlapped and folded.

At this time, the first-stage end portion (25) is folded together with the first-stage end portion (23) of the folded portion due to the notch (7) reaching the right side end portion (15) or the left side end portion (16).

Similarly, the folding line (18) of the second stage is made into a valley fold and folded. At this time, the second step end portion (26) is folded together with the second step (24) of the folding portion, but the second step end portion (26) continuous with the second step (24) of the folding portion is notched (26). It is shorter than the first stage end (25) due to the presence of 7).

FIG. 5 is a schematic plan view for explaining a state in which a first-stage folding line is folded for reclosing in one embodiment of a pouch with a reclosing function according to the present invention. The first step (23) is in a state of being folded back at the position of the folding line (11), and in FIG. 5, the ridgeline of the mountain fold of the folding line (11) is shown. Further, the first-stage end portions (25) on both the left and right sides, which are continuous with the first-stage (23) of the folded portion, are also in a folded state at the same time.

Further, the second step (24) of the folded portion is not shown in FIG. 2 because the first step (23) of the folded portion is folded and overlapped.

The opening (20) faces downward in FIG. 5 because the first step (23) of the folded portion is folded, but is closed because the folding line (11) is folded downward. It is in a state of being.

In the state shown here, the folding line (18) of the second stage (24) of the folded portion is in a state of not being folded yet.

FIG. 6 is a plane for explaining a state in which a second-stage folding line is folded and the first-stage end portion is inserted into a through hole for reclosing in one embodiment of a pouch with a reclosing function according to the present invention. It is a schematic diagram.

In the state shown here, the folding line (18) of the second step (24) of the folding portion is folded back, and the end portion (25) of the first step is inserted into the left and right through holes (6). .. In FIG. 6, when viewed from the front side of the pouch, the front side of the first-stage end portion (25) and the back side of the second-stage end portion (26) are shown.

As shown in FIGS. 4 and 5, the first-stage end portion (25) inserted into the through hole (6) has a shape in which the tip portion is widened. The folded state of the folded portion (17) can be easily fixed and maintained. As a result, the reclose function can be realized.

FIG. 7 shows a state in which the second-stage folding line is folded and the first-stage end portion is inserted into the through hole for reclosing in one embodiment of the pouch with a reclosing function according to the present invention, as viewed from the back surface side of the pouch. It is a plane schematic diagram for demonstrating the state.

In the state shown here, the folded state is the same as that shown in FIG. 6, but is a view seen from the back surface of the pouch, and the first step end portion (25) inserted into the through hole (6). However, as shown in FIGS. 4 and 5, since the tip portion is wide, once inserted, the folded portion (17) can be easily fixed and maintained in the folded state. You can see how it can be done.

That is, in the examples shown in FIGS. 6 and 7, the relationship between the width of the second step (24) of the folded portion, the diameter of the through hole (6), and the maximum width of the end portion (25) of the first step is determined.
It is desirable that the width of the second step of the folded portion <the diameter of the through hole <the maximum width of the end portion of the first step.

As shown in FIG. 7, the closed portion (28) is a portion where the folded portion (17) is folded, and the portion where the second-stage folding line (18) is a mountain fold is the upper side. Further, in FIG. 7, the back side body portion (29) is shown as the body portion.

FIG. 8 is a schematic plan view for explaining another embodiment of the pouch with a reclosing function according to the present invention.

In the example shown in FIG. 8, the connecting member (5) with the tube is provided at the corner portion of the lower side sealing portion (10) and the right side sealing portion (2). Also in this case, the closing mechanism of the upper part of the pouch is the same as the example shown in FIGS. 1 to 7. The connection member (5) with the tube may be arranged at either the left or right corner at the lower end.

By arranging the connecting member (5) with the tube at the lower end portion, it is possible to reduce the residual liquid inside the pouch when the pouch is actually used.

FIG. 9 is a schematic plan view for explaining a state in which the pouch with a reclosing function according to the present invention is used by hanging it diagonally in another embodiment.

As shown in FIG. 9, in the medical field, it is common to hang a pouch on a hanger (31) in a situation where it is actually used for administering liquid foods such as nutritional supplements and pharmaceuticals. , Hook one of the left and right through holes (6) on a hanger and hang it, and connect the contents (22) in the direction of the arrow (32) via the tube (30) connected to the connecting member (5) with the tube. May be taken out.

As described above, in the pouch (100) with a reclosing function according to the present invention, by arranging the connecting member (5) with the tube at the lower end portion, the residual liquid inside the pouch when the pouch is actually used can be further reduced. It is possible to reduce it.

As described above, according to the present invention, it is possible to provide a pouch with a reclosing function without providing a chuck on the pouch and without leaving an unsterilized portion or a sterilizing liquid.

Further, the pouch with a reclosing function according to the present invention is a pouch made of a laminated body having a sealant layer as a base material of a plastic film, and the laminated body can be designed for a layer structure and material can be selected as necessary. can.

The pouch according to the present invention does not impose any special limitation on the composition of the plastic film used or the laminate based on the plastic film, but is generally used in the material composition for realizing the pouch according to the present invention. Add an explanation of what is possible.

As described above, the pouch according to the present invention is based on a plastic film. 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 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 toughness against piercing and toughness against impact.

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 pouch.

Further, for example, for the purpose of improving the storage stability of the contents, if necessary, an opaque layer such as a colored film that shields ultraviolet rays can be provided in the laminate using the plastic film as the base material. Alternatively, the gas barrier layer can be provided in the laminate using the plastic film as the base material.

For example, a gas barrier film in which a gas barrier layer made of an inorganic compound is vapor-deposited on the surface of a plastic film can be used. Further, a metal foil such as aluminum can be used as the gas barrier layer. In either case, it is effective in improving the storage stability of the contents.

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 in which a coating material in which a resin is dissolved in a solvent is applied to 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-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) one or more alkoxides or hydrolysates thereof, or (b) tin chloride is used as a method for forming the coating layer. 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 material. These may be appropriately used with a gas barrier layer such as a metal foil depending on the application, purpose, and required quality.

The sealant layers of the laminated body constituting the pouch are formed by stacking two plastic films so that the sealant layers face each other, heating and pressurizing them to heat-seal them, and adhering them to each other to make a bag in the pouch. enable.

Of the thermoplastic resins, polyolefin resins are generally used as the material of the sealant layer, and 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.

In addition, 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 plastic film by laminating a material that has been formed into a film in advance by laminating.

In this way, according to the present invention, it is possible to provide a pouch with a reclosing function without providing a chuck on the pouch and without leaving an unsterilized portion or a sterilizing liquid.

1 ... Upper side 2 ... Right side seal part 3 ... Left side seal part 4 ... Upper side seal part 5 ... Connection member with tube 6 ... Through hole 7 ... Notch 8 ... Front side body 9 ... Lower side 10 ... Lower side seal part 11 ... Folding line 12 ... Scheduled cut line 13 ... Upper part of body 14 ... Wide seal part 15 ... Right side end Part 16 ... Left side end 17 ... Folding part 18 ... Second-stage folding line 20 ... Opening 21 ... Water 22 ... Contents 23 ... Folding part 1st stage Eyes 24 ... Second stage 25 of the folding part ... First stage end 26 ... Second stage end 27 ... Separate container 28 ... Reclosed part 30 ... Tube 31 ... Hanger 32 ... Arrow 100 ... Pouch with reclose function

Claims (2)

A pouch with a reclosing function, which is made of a laminate having a sealant layer and a plastic film as a base material.
The two laminated bodies form the front and back body parts, and the sealant layers face each other to seal the peripheral part of the body part.
The bottom side is sealed with a connecting member to the tube that pulls out the contents downwards.
The torso is sealed on both the left and right sides,
The seals on both the left and right sides are wide seals at the upper part of the body, and the wide seals are provided with through holes on each of the left and right sides into which fingers can be inserted.
The wide seal portion is provided with a notch that penetrates the front and back body portions on the upper side and the center side of the pouch so as to surround the through hole continuously from the left and right ends of the pouch.
The upper side is horizontally sealed with the upper side seal part and is sealed.
The upper side seal portion can be cut off and the upper part of the pouch can be opened to form an opening.
Below the upper side seal portion, one or more folding lines are provided in the horizontal direction at intervals.
The left and right ends of the folding line reach the wide sealing portion.
The folding line is folded in order from the top, and the upper part of the body can be folded.
The folds allow the opening formed at the top of the pouch to be reclosed.
A pouch with a reclose function that can fix the folded part by inserting the seals on the left and right ends above the first folding line from the top into the through hole. The pouch with a reclosing function according to claim 1, wherein the connecting member with the tube for taking out the contents downward is provided at either the left or right end of the lower side of the pouch body.

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