JP2018118750A - Pouch, package using said pouch, and manufacturing method of package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pouch which is relatively flat when storing and transporting and can smoothly pour out contents and can be manufactured relatively easily, more specifically, to provide a pouch with a pouring spout having a pouring path in which a heat shrinkable tape is disposed in an upper corner portion and having improved content pourability.SOLUTION: In the pouch 10 with a pouring-out passage having a pouring-out passage T which the heat shrinkable tape 14 is disposed on an upper corner, the heat shrinkable tape 14 is fixed to the interior of the pouch by an upper side seal part S1 forming the upper end of the pouring-out passage T, a lower side seal part S2 forming the lower end of the pouring-out passage T, and the other sealing part S4.SELECTED DRAWING: Figure 1

Description

The present invention is a pouch suitable for filling liquids such as shampoos and rinses, liquid detergents, liquid foods such as various beverages and hot pot soups, powders such as powdered soaps and granular bleaches, and the like in the upper corner. The present invention relates to a pouch having a pour-out path, a package in which the pouch is filled with contents, and a method for manufacturing a package in which the contents are filled using the pouch.
In addition, the pouch in the present invention means all pouches (bags) filled with liquid or powder, for example, joint seal bags, three-side seal bags, side seal bags, flat bags, gusset bags, standing pouches, etc. Is included.

Liquids and powders such as liquids and liquid foods are often filled and sold in containers called standing pouches having a pour channel in the upper corner. FIG. 6 shows a schematic perspective view of a standing pouch having a pouring path. The standing pouch includes a front film 61, a back film 62, and a bottom film 63, and is provided with a pouring path T for discharging contents at an upper corner. Since the standing pouch 60 is substantially flat before filling the contents, it is convenient for storage and transportation. However, the standing pouch 60 has a problem that it is difficult to pour out the contents because the pouring path T is flat. The front film 61 and the back film 62 are in close contact with each other in the pouring path T, and the pouring path T is blocked.
In order to improve the pouring of the contents, standing pouches with a cylindrical tube inserted into the pouring path or a mold formed on the pouring path by pressure forming etc. can be seen, but these pouches contain the contents. Since the pouring channel has already swelled in the state before starting, a large volume is required for storage and transportation.

  Patent Document 1 is an invention relating to a pouch (bag) formed by sealing a front film, a back film (a pair of side wall films), and a bottom film (bottom wall fill), and a pouring path between the front film and the back film. A heat-shrinkable tape (shrinkable film) that intersects (pouring direction) is disposed. Before or after the contents are stored, the heat-shrinkable tape is heated and shrunk to deform the front film and / or the back film so as to bend outward, and the film in the pouring path (spout) It avoids close contact.

  Patent Document 2 is also an invention relating to a pouch (storage bag) with improved content pouring. The pouch is characterized in that a heat-shrinkable tape (tape made of a shrink film) is interposed in the middle portion in the longitudinal direction of the pouring channel (pouring port). By shrinking the heat-shrinkable tape, the width of the pouring path is shortened, and the film forming the pouring path is shaped to swell outward.

JP 2000-118544 A JP 2006-199329 A

  The pouch described in Patent Document 1 requires a process of fixing a heat-shrinkable tape to the inner surface of the front film and / or the back film separately from the conventional pouch manufacturing process, so that it is difficult to continuously produce the pouch. there were. Also, if the positional relationship between the heat-shrinkable tape and the pouring path is shifted in the pouch, the swelling of the front film and the back film may not reach the spout, and it is difficult to improve the pouch pourability stably. there were.

  The pouch described in Patent Document 2 does not require a separate process for fixing the heat-shrinkable tape because the heat-shrinkable tape can be fixed in the pour-out path by the seal portion that forms the pour-out path. However, in the pouch, although the heat-shrinkable tape can deform the front film and the back film of the pouring path (portion T in FIG. 6), the root portion (portion B in FIG. 6) is deformed. It is not possible. For this reason, the front film and the back film are in close contact with each other at the root portion B, and the flow path of the contents may be blocked.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a pouch that can be poured out smoothly while being substantially flat during storage and transportation, and that is relatively easy to manufacture. Specifically, an object of the present invention is to improve the content pouring property in a pouch with a pouring path having a pouring path in which the heat-shrinkable tape is arranged at the upper corner.

  In order to improve the content pouring property in the pouch with the pouring path in which the heat-shrinkable tape is disposed in the pouring path, the present inventors need to deform the base portion of the pouring path together with the pouring path. I found out. And in order to deform the base part of the pouring path together with the pouring path, the heat-shrinkable tape is fixed inside the pouch by the seal part that forms the pouring path and the seal part that forms the contents storage part. As a result, the present invention was found.

That is, according to the present invention, the end edge of the plastic film is a pouch sealed with the content filling port left, and an upper seal portion that forms the upper end of the pouring path, and a lower seal that forms the lower end of the pouring path Between the plastic film forming the pouring path, the pouring path formed by the portion and the tip seal portion that forms the tip of the pouring path, and the content storage portion formed by the other sealing portion In the pouch with a pour-out path in which the heat-shrinkable tape is arranged, the heat-shrinkable tape is fixed to the inner surface of the pouch by an upper seal portion, a lower seal portion, and another seal portion. A pouch with departure is provided.
The upper seal part and / or the lower seal part is formed with a fragile part that can trigger opening, and the fragile part includes a tip seal part that forms a tip of the dispensing path, and the heat-shrinkable tape. The pouch with the pour-out path is provided between the end part on the side of the pour-out path.
The pouch with a pour-out path is provided, wherein the pouch is a standing pouch.

The pouch with a pour-out path is filled with contents, and the heat-shrinkable tape includes a part that forms the pour-out path of the plastic film and a part that forms a root part of the pour-out path. A package characterized in that it is curved is provided.
Further, a method of manufacturing a package filled with the contents using the pouch, the heat shrinking process for shrinking the heat shrinkable tape, the filling process for filling the contents, and the sealing for sealing the contents filling port The manufacturing method of the package characterized by providing a process is provided.

  Since the pouch of the present invention is substantially flat before the heat-shrinkable tape is shrunk by heating, a large space is not required for storage and transportation of the pouch. When the heat-shrinkable tape is shrunk by heating, the portion forming the pouring path of the plastic film and the base portion thereof can be bent at the same time, so that the pouring property of the contents can be easily and reliably increased. . In addition, the heat-shrinkable tape is fixed by the upper and lower seals that form the pouring path, and the other seals that form the contents storage, so the heat-shrinkable tape is fixed to the film that forms the pouch. Therefore, it is not necessary to provide a separate sealing process only for this purpose.

In addition, when a brittle portion that can trigger opening is formed between the tip seal portion that forms the tip of the pouring channel and the pouring channel side end portion of the heat-shrinkable tape, another member such as a hook or a cutter is used. A spout can be formed without using it. When opening the pouch from the vulnerable part,
There is no problem that the heat-shrinkable tape is difficult to open.

  Further, when the pouch is a standing pouch, a package filled with the contents can be stood and sold at the store.

1A is a schematic plan view of a pouch representing an embodiment of the present invention, and FIG. It is typical top view (A) (B) (C) showing an example of a weak part in a pouch of the present invention. FIG. 2 is a schematic plan view (A) of a package using the pouch shown in FIG. 1 and an end view (B) taken along the line a-a ′. It is a typical top view showing another embodiment of a pouch of the present invention. It is a typical top view showing another embodiment of a pouch of the present invention. It is the typical top view (A) showing the conventional pouch, and its typical arrow end view (B) of a-a '.

Hereinafter, the present invention will be described in more detail with reference to the drawings.
FIG. 1: is a schematic plan view (A) of the pouch 10 with a pouring path showing one embodiment of the present invention, and a schematic arrow end view (B) of aa ′ thereof. A pouch 10 shown in FIG. 1 is a standing pouch, and includes a front film 11, a back film 12, a bottom film 13, and a heat-shrinkable tape 14, and a filling port 15 for filling contents is formed above. ing.

[the film]
Each of the front film 11, the back film 12, and the bottom film 13 can be a film similar to a film conventionally used for a standing pouch, for example, a laminate film including a base material layer and a sealant layer is adopted. be able to.

  The base material layer includes, for example, a polyester film such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyamide film (PA), polystyrene film (PS), polycarbonate film (PC), polyacrylonitrile. A film made of a film (PAN), a polyimide film (PI), polyvinyl alcohol (PVA), polyvinylidene chloride (PVDC), polypropylene (PP), an ethylene-vinyl alcohol copolymer (EVOH), or the like can be used. The substrate layer is not particularly limited as long as it has mechanical strength and dimensional stability, but a biaxially stretched film is preferable, and a biaxially stretched film of PET or PA is particularly suitable in consideration of price and strength. . Furthermore, a vapor deposition layer and a coating layer can be provided in a base material layer as needed. The thickness of the base material layer is preferably in the range of 10 to 50 μm and more preferably in the range of 10 to 30 μm in consideration of workability.

  For the sealant layer, for example, low density polyethylene (LDPE), linear low density polyethylene (L-LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), ethylene-vinyl acetate copolymer (EVA) A film made of a polyolefin resin such as polypropylene (PP) can be used. The thickness of the sealant layer is preferably in the range of 10 to 150 μm, more preferably in the range of 15 to 100 μm. With the sealant layer, the front film 11 and the back film 12, as well as these films and the bottom film 13 are heat sealed.

  The method for laminating the base material layer and the sealant layer is not particularly limited, and it may be bonded using, for example, an adhesive for dry lamination. Adhesives for dry lamination include two-component curable urethane adhesives, polyester urethane adhesives, polyether urethane adhesives, acrylic adhesives, polyester adhesives, polyamide adhesives, epoxy adhesives, etc. Can be used.

  If it is necessary to improve various physical properties of the front film 11, the back film 12, and the bottom film 13, an intermediate layer can be provided between the base material layer and the sealant layer. In the case where the contents are easily changed when exposed to air, an aluminum foil or the like can be employed as the intermediate layer. In addition, these films can be appropriately printed as necessary. The front film 11, the back film 12, and the bottom film 13 may be the same film, but may be films having different layer configurations.

[Heat shrinkable tape]
The greatest feature of the pouch of the present invention is that the heat-shrinkable tape 14 is inserted into the pouring path T and the root portion B thereof. As the heat-shrinkable tape 14, a film that has been conventionally used as a shrink film and cut into a width of, for example, 5 to 70 mm, preferably 10 to 30 mm, can be used. Although the thickness of the heat-shrinkable tape 14 is not specifically limited, 10-80 micrometers is preferable from a viewpoint of shrinkage stress, and 15-30 micrometers is especially preferable. The material is not particularly limited, and examples thereof include one or a mixture of two or more selected from thermoplastic resins such as PET, L-LDPE, LDPE, MDPE, HDPE, EVA, PP and PS. it can. Among these, ethylene-based resins such as L-LDPE, LDPE, and EVA are suitable as a material for the heat-shrinkable tape 14 because they are excellent in heat sealability. In addition, when the contents are hot-filled, the heat-shrinkable tape 14 has a low temperature shrinkage property (a property of shrinking 10% or more at a temperature below 100 ° C., particularly a property of shrinking 10% or more at a temperature below 90 ° C.). If so, the heat-shrinkable tape 14 can be shrunk by heat at the time of filling the contents, and the pouring path T and the root part B can be deformed. The heat-shrinkable tape 14 may be a single layer tape or a multilayer tape having two or more layers.

[Vulnerable part]
The pouch 10 shown in FIG. 1 is further provided with a fragile portion 16. The fragile portion 16 is formed by making cuts, scratches or the like in the front film 11 or the back film 12, and serves as a trigger (opening start portion) when the pouch is opened. The pouch 10 of the present invention preferably includes the weakened portion 16 in the upper seal portion S1 and / or the lower seal portion S2. The fragile portion 16 is preferably provided between the tip seal portion S3 that forms the tip of the dispensing path and the side end 14α of the heat-shrinkable tape 14 on the dispensing path side. When the fragile portion 16 is provided on the base portion B side with respect to the side end portion 14α, when the pouch 10 is opened from the fragile portion 16, opening by the heat-shrinkable tape 14 becomes difficult.

  FIG. 2 is a schematic plan view illustrating an example of the fragile portion 16. 2A is formed by a V-shaped notch (missing portion) 16α, FIG. 2B is formed by a linear cut 16β, and FIG. 2C is formed by a plurality of scars 16γ.

  Moreover, it is desirable that the front film and / or the back film forming the pouch of the present invention is subjected to linear half-cut processing in the direction crossing the pouring path T starting from the weakened portion 16. The half-cut process can be formed by providing a groove in the film with, for example, a laser. If the spout is distorted in the pouch of the present invention, the side end portion of the heat-shrinkable tape may protrude from the spout. If the heat-shrinkable tape protrudes from the spout, the contents may be poured out in an unexpected direction.

[Pouch manufacturing method]
A pouch 10 shown in FIG. 1 has a bottom film 13 and a heat-shrinkable tape 14 interposed between a front film 11 and a back film 12, and heat seals the left and right side edges to provide other seal portions (side seal portions). ) S4 is formed, and an upper seal part S1 that forms the upper end of the pouring path T, a lower seal part S2 that forms the lower end of the pouring path T, and a tip seal part S3 that forms the tip of the pouring path T are formed Further, it can be manufactured by heat-sealing the bottom part into a ship bottom shape to form another seal part (bottom seal part) S4.
The heat-shrinkable tape 14 shown in FIG. 1 is fixed between the front film 11 and the back film 12 by the upper seal part S1, the lower seal part S2, and the lower seal part by another seal part S4. ing.

[Packaging]
FIG. 3 shows a package 10 ′ in which the heat-shrinkable tape 14 of the pouch 10 shown in FIG. 1 is heated and shrunk, then the contents (not shown) are filled, and the filling port is heat-sealed. As shown in FIG. 3 (B), the packaging body 10 'is so formed that the portion forming the pouring path T of the front film 11 and the back film 12 is projected outward by the heat shrinkable tape 14' after heat shrinkage. And the distance between the upper seal portion S1 and the lower seal portion S2 is shortened. In addition, the distance between the upper seal portion S1 and the other seal portion S4 following the lower seal portion is also shortened. Therefore, not only the pouring path T but also the base portion B thereof, the front film 11 and the back film 12 are curved so as to be convex outward, and the pouring property of the contents is enhanced.

[Other Embodiments]
FIG. 4 is also a schematic plan view of the pouch 40 in which the heat-shrinkable tape 44 is fixed to the inner surface of the pouch by the upper seal portion S1, the lower seal portion S2, and another seal portion S4 following the lower seal portion. It is. The pouch 40 shown in FIG. 4 is a pouch (three-side seal bag) made of a front film and a back film, and other seal portions S4 are formed on both sides and the bottom, leaving a filling port 45. In the pouch 40, the lower seal portion S2 and the other seal portions S4 are smoothly continued from the lower discharge portion T.
The pouring channel T in the present invention is a portion whose width is narrowed to pour out the contents, and is a portion whose width is substantially the same as the tip seal S3 of the pouring channel T, or a portion whose width changes gently. Point to. When the seal line forming the extraction path T is a straight line, the portion where the seal line is formed from the tip of the extraction path T to the point where the inclination of the seal line changes is defined as the extraction path T. In addition, when the seal line forming the extraction path T is a curve, the portion where the seal line is formed up to the point where the bending direction changes is defined as the extraction path T. The upper seal portion S1 means a seal portion that forms the upper end of the extraction passage T, and the lower seal portion S2 means a seal portion that forms the lower end of the extraction passage T. In the pouch 40 shown in FIG. 4, the line L is the boundary between the pouring path T and the content storage portion C, and the lower seal portion S2 and the other seal portion S4 following the lower seal portion are connected by the line L. It is divided.

FIG. 5 is a schematic plan view showing another embodiment of the pouch of the present invention. In the pouch 50, an upper seal portion S1, a lower seal portion S2, another seal portion (top seal portion) S4 following the upper seal portion, and another seal portion (side seal portion) S4 following the lower seal portion, A heat-shrinkable tape 54 is fixed to the inner surface of the pouch. When the heat-shrinkable tape 54 contracts in the pouch 50, the distance between the upper seal portion S1 and the lower seal portion S2 of the pouring path T is reduced, and at the same time, another seal portion (top seal portion) S4 following the upper seal portion. Since the distance from the other seal portion (side seal portion) S4 following the lower seal portion is also reduced, the pouring path T and its root portion B are both greatly curved, and the content pouring property is enhanced. However, since the filling port 55 of the content of the pouch 50 is narrowed by another seal portion (top seal portion) S4, it is difficult to fill the content when the pouch 50 is a small size.
In the pouch 50 shown in FIG. 5, the line L is the boundary between the pouring path T and the content storage part C, and the other seal part (top seal) following the upper seal part S1 and the upper seal part by the line L. Part) S4, and the lower seal part S2 and another seal part (side seal part) S4 following the lower seal part are separated.
In the pouch of the present invention, the heat-shrinkable tape may be fixed to the inner surface of the pouch by another seal portion that follows the upper seal portion, the lower seal portion, and the upper seal portion.

[Method of manufacturing a package using a pouch]
Next, a method for producing a package filled with contents using the pouch of the present invention will be described. The manufacturing method of the package of the present invention includes a heat shrinking process, a filling process, and a sealing process.

<Heat shrinkage process>
The heat shrinking process is a process in which the heat-shrinkable tape is shrunk by heat and the plastic film forming the pouch pouring path and its root part is bent by the shrinking stress. Although the method is not particularly limited, for example, the content filling port may be opened, and hot air may be blown into the pouch from the filling port. The heat-shrinkable tape may be heated from the outside of the pouch by passing the pouch through a dryer. The temperature of the hot air may be appropriately determined according to the shrinkage temperature of the heat-shrinkable tape. Further, the time for applying the hot air is not particularly limited, but it is generally several seconds to several tens of seconds.
Note that the heat shrinking process is preferably performed immediately before the filling process for filling the contents. Since the pouch after the heat shrinking process is not flat, a large space is required for storage and transportation. However, the heat shrink process in the present invention is not limited to just before filling the contents. For example, the heat-shrinkable tape may be shrunk by the heat of the heat-sealing process performed when manufacturing the pouch, or the heat-shrinkable tape may be shrunk by heating the package after filling the contents. good.

<Filling process / Sealing process>
When the shrinkage of the heat-shrinkable tape is stabilized, the content is filled from the content filling port. Finally, if the filling port is sealed by heat sealing or the like, the package of the present invention is completed. In addition, the method similar to the past can be suitably employ | adopted for the filling method of a content, and the sealing method of a filling port.
Moreover, when the content temperature at the time of filling is higher than the shrinkage temperature of the heat-shrinkable tape, the heat shrinking step and the filling step can be performed simultaneously. When filling the contents in the pouch, the shrinkable tape is contracted by the heat of the contents.

10, 40, 50 Pouch 10 'of the present invention Packaging body 11, 61 Front film 12, 62 Back film 13, 63 Bottom film 14, 44, 54 Heat shrinkable tape 14' Heat shrinkable tape (after heat shrinking) )
14α Side end portions 15, 45, 55 on the outlet side of the heat-shrinkable tape Content filling port 15 ′ Content filling port (after sealing)
16 Vulnerable part 60 'Conventional pouch (standing pouch)
T Pouring path B (Root of pouring path) C Contents storage part S1 Upper seal part S2 Lower seal part S3 Tip seal part S4 Other seal parts

Claims (5)

A pouch in which the edge of the plastic film is sealed leaving the content filling port,
A pouring path formed by an upper seal portion that forms the upper end of the pouring path, a lower seal portion that forms the lower end of the pouring path, a tip seal portion that forms the tip of the pouring path, and other seal portions A pouch with a pour-out path in which a heat-shrinkable tape is disposed between the plastic films that form the pour-out path.
A pouch with a pour-out path, wherein the heat-shrinkable tape is fixed to the inner surface of the pouch by the upper seal portion, the lower seal portion, and the other seal portion.   The upper seal portion and / or the lower seal portion is formed with a fragile portion that can be a trigger for opening, and the fragile portion is between the tip seal portion and the end of the heat shrinkable tape on the side of the inlet path. The pouch with a pour-out path according to claim 1, wherein the pouch is formed as described above.   The pouch with a pour-out path according to claim 1 or 2, wherein the pouch is a standing pouch.   A packaging body filled with contents in the pouch with a pour-out path according to any one of claims 1 to 3, wherein the heat-shrinkable tape forms the pour-out path of the plastic film, and A packaging body characterized in that a portion forming a root portion of the pouring path is curved. A method for producing a package filled with contents using the pouch according to any one of claims 1 to 3,
A package manufacturing method comprising a heat shrinking step for shrinking a heat-shrinkable tape, a filling step for filling a content, and a sealing step for sealing a content filling port.

Images