JP5002908B2 - Package - Google Patents

Description

  The present invention relates to a self-supporting bag, and more specifically, the self-supporting bag is made of a single laminated sheet, one end of the upper portion is formed by a folded portion of the laminated sheet, and an outlet is provided at one end of the folded portion, It is related with the self-supporting bag excellent in the convenience which does not obstruct | occlude the taking-out opening in the middle of taking out.

  Conventionally, in most cases, a standing pouch type bag is used as a bag that can safely seal and package liquid contents and powdered contents and has self-supporting properties. This is because standing pouch-type bags have almost no risk of liquid leakage due to defective seals, even when filled with liquid contents or powdered contents, and have excellent self-supporting stability. Also, the shape of the upper portion of the bag is simple, like the four-side seal type bag, and therefore has the advantage of being easy to open with a notch or the like. In addition, the standing pouch type bag includes a two-piece type pouch that uses separate laminated sheets for two side parts and one bottom part, and one laminated sheet for two side parts and one bottom part. It can be roughly divided into one-piece type pouches. In addition, for refillable pouches that seal and package liquid contents, various measures have been made in the pouring part for convenience, and the contents can be placed in other containers without spilling the contents outside when opened. In order to be able to transfer safely, the opening is formed by cutting out a part such as a corner instead of the entire upper part of the pouch, or by providing a spout part with a narrow width at a part of the upper part of the pouch, or made of plastic A separate spout consisting of a pour cylindrical body is fitted and attached to the upper upper corner of the pouch body, and furthermore, a narrow spout is formed by a heat seal pattern, and the vicinity of the spout For example, a method of applying a concavo-convex pattern to at least one of the side surface films to provide a bulging portion is employed. (For example, see Patent Documents 1 to 3)

However, although the method of forming the opening of the pouch by cutting out a part such as a corner portion instead of the entire upper portion of the pouch is simple, there is a problem that the spout is blocked during the pouring. Similarly, the method of providing a spout portion with a narrow width at a part of the upper portion of the pouch also has a problem that the spout is blocked during the pouring of the contents. In addition, the method of inserting and attaching a separate spout made of a plastic pour cylinder into the upper upper corner of the pouch body is excellent in safety and ease of transfer, but the manufacturing process is In addition, the spout itself is expensive, and the empty pouch fitted with the spout is thicker, so the storage and transportation costs are also expensive. Since the number of empty pouches loaded in the feeder section of the machine is greatly reduced, there is a problem that the operator needs to frequently supply empty pouches, and as a whole, the cost increases and the complexity of processes and operations increases. In addition, a method of forming a narrow outlet portion by a heat seal pattern and providing a bulging portion by applying an uneven pattern to at least one side surface film in the vicinity of the outlet portion includes a dedicated seal bar and an uneven portion. There is a problem in that parts such as a dedicated mold for applying the material are necessary and costly. Furthermore, in the above-mentioned self-supporting bag, the upper part of the two side parts becomes a filling port for the contents, and after filling, a sealed part is formed. There is a problem that it is difficult to print.
JP-A-11-70947 JP 10-258873 A JP-A-11-349012

  Therefore, the present invention has been made in view of the above problems, and the object of the present invention is a self-supporting bag capable of safely sealing and packaging liquid contents and powder contents. An object of the present invention is to provide a self-supporting bag that can be manufactured at a low cost without causing the spout to be blocked during the delivery.

In order to solve the problems as described above, the self-standing bag of the invention according to claim 1 is composed of a single laminated sheet having a heat-adhesive resin layer on one side, a front wall and a back wall, A self-supporting bag having a gusset portion formed by bending inwardly at the lower end portions of the front wall and the rear wall, and having both side end seal portions and bottom portion seal portions, and packaging liquid or powdered contents. One of the side end seal parts is formed of a seal part that is heat-sealed after filling the contents and a seal part continuous to both ends thereof, and the end opposite to the bottom face seal part is connected to the front wall and the back wall. And a takeout port through which the filled contents can be taken out by cutting out only a corner portion at one end of the bent portion.

  The self-supporting bag of the present invention is formed with a bottom surface having a shape that is self-supporting, has excellent self-supporting properties, and has an outlet at one end of the bent portion, and is a liquid content. Also, there is an effect that the spout is not blocked during the pouring.

  Furthermore, since the self-supporting bag of the present invention has a bent portion, it is possible to print on the bent portion, and it is possible to provide a continuous pattern straddling the side portions of the front and back surfaces. This has the effect of increasing the degree of freedom in design.

  In addition, it is a one-piece self-supporting bag that saves material compared to a two-piece self-supporting bag, and has a folding part at the top, so the area of packaging material (laminated sheet) used per bag It is possible to reduce the cost, and the cost can be reduced and the volume of waste can be reduced.

  Moreover, the self-supporting bag of the present invention is a one-piece self-supporting bag, and has an effect of enabling automatic filling and packaging with a vertical pillow type automatic packaging machine.

Embodiments of the present invention will be described below.
The self-supporting bag of the present invention is a bag formed by heat-sealing the edge of the laminated sheet with a one-piece laminated sheet, and at least one end of the bag is formed by a bent portion of the laminated sheet. As long as the bottom portion can provide self-supporting properties, it can be formed into an arbitrary shape. As shown in FIG. 1, a folded part is formed on the upper part of the self-supporting bag, and the bottom part is formed by folding the laminated sheet inward to form a gusset part, and then heat sealing the edge part of the part to form the bottom part. And it can implement in the form which uses either one of the side parts of right and left both sides for the filling port of a content. And the spout is provided in the corner part of the end of the upper bending part of a self-supporting bag. In addition, as shown in FIG. 2, both ends of the laminated sheet are aligned and heat sealed at one end of the bottom surface portion.

  Such a self-supporting bag can be manufactured using a normal gusset bag making machine or a self-supporting bag making machine. It can also be manufactured using a vertical pillow automatic packaging machine, and in-line automatic filling and packaging is possible from bag making to filling.

  The laminated sheet used for such a self-supporting bag takes into consideration the chemical protection functions (gas barrier properties, moisture permeability, etc.) and physical protection functions (tensile strength, impact strength, heat seal strength, etc.) required for the contents. And it is designed with the laminated film which has a base material layer / intermediate layer / sealant layer as a basic composition. Depending on the liquid content and the powdered content, the performance required for the laminated film changes, so the configuration of the laminated film also changes. For example, as a typical configuration example of the liquid content, the following Such a structure is mentioned.

(1) ON / DL / L-LDPE
(2) ON / DL / biaxial stretching HDPE / DL / L-LDPE
(3) ON / DL / biaxially stretched PP / DL / L-LDPE
(4) ON / DL / AL / DL / L-LDPE
(5) ON / DL / biaxially stretched PP / DL / AL / DL / L-LDPE
(6) ON / AC / PE / L-LDPE
(7) PET / DL / L-LDPE
(8) PET / DL / AL / DL / ON / DL / L-LDPE
(9) PET / DL / AL / DL / ON / DL / CPP
(10) PET / DL / ON / AL / DL / DL / L-LDPE
(11) PET / DL / ON / AL / DL / DL / CPP
(12) PET / DL / EVOH / DL / ON / DL / CPP
(13) PET / DL / OPP / DL / AL / DL / L-LDPE
(14) HSOPP / DL / AL / DL / PET / DL / L-LDPE
(15) HSOPP / PE / aluminum vapor-deposited paper / DL / ON / DL / LDPE
(16) HSOPP / DL / deposition PET / DL / L-LDPE
However, the present invention is not limited to these, and various films can be combined and used as a laminated film depending on the required performance. Moreover, linear openability can be given by laminating a tearable film. The abbreviations used in the description of the configuration examples are as follows. ON: biaxially stretched nylon film, L-LDPE: linear low density polyethylene film, HDPE: high density polyethylene, PP: polypropylene, AL: aluminum foil, AC: anchor coat, PE: polyethylene, DL: dry laminate adhesive , CPP: unstretched polypropylene, PET: biaxially stretched polyester film, EVOH: ethylene vinyl alcohol copolymer film, OPP: biaxially stretched polypropylene film, HSOPP: heat-sealable biaxially stretched polypropylene film, LDPE: low density polyethylene, vapor deposition PET: A biaxially stretched polyester film deposited on silica or alumina.

Next, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view of an embodiment of a self-supporting bag according to the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 4 is a cross-sectional view of a conventional one-piece type self-supporting bag corresponding to the line AA in FIG. 1, and FIG. 5 is a cross-sectional view of a conventional two-piece self-supporting bag corresponding to the line AA in FIG.

  Differences between the self-supporting bag P1 of the present invention shown in FIGS. 1 and 2 and a normal one-piece self-supporting bag and a two-piece self-supporting bag will be described. As shown in FIG. 4, the conventional one-piece type self-supporting bag P <b> 2 is a single laminated sheet 2 that folds the laminated sheet 2 inwardly between the front wall 3 and the back wall 4 to form a gusset portion. For example, heat sealing with a sealing pattern such as a ship bottom shape that is concave from both sides to the center to form a bottom surface portion 5 to give the bag self-supporting properties, and the left and right side edge portions to the side edges Heat sealing is performed at the seal portion, and the upper portion is open. In addition, as shown in FIG. 5, the conventional two-piece self-supporting bag P3 separates the same laminated sheet and is provided with a front wall 3 and a rear wall 4, and another laminated sheet is folded inside between the lower portions. The bottom part 35 is formed by heat sealing with a sealing pattern such as a ship bottom shape that is concave from both sides to the center part to provide the bag with self-supporting properties, and the left and right side edge parts Each is heat-sealed at the side end seal portion, and the upper portion is open. On the other hand, the self-supporting bag P1 of the present invention is a one-piece laminated sheet 2 having one end of the laminated sheet 2 as a starting point at the lower edge of the back wall 4 and the other end as an end point at the edge of the bottom 5. The front wall 3 and the rear wall 4 are connected to each other through the bent portion 1 of the laminated sheet 2 at the top, and the laminated sheet 2 is folded back to form a gusset portion, and the edge portion is heat sealed. The bottom surface portion 5 is formed, and the start point (end edge portion of the lower portion of the back wall 4) and the end point (end edge portion of the bottom surface portion 5) are aligned and heat-sealed. Further, of the left and right side portions, one side portion (the left side portion in the figure) is heat-sealed by the side end seal portion 8, and the opening portion 8 b is formed with the other side portion as a filling port for contents. The side end seal portion 8a is provided as a heat-sealed bag-like container. Cutout portions 6 are provided in the vicinity of the lower ends on both sides of the gusset portion forming the bottom surface portion 5, and the portions are heat-sealed with side end seal portions 8, 8 a, so that the front wall 3 and the back wall 4 are cut out. , 6 is self-supporting by forming the bottom surface portion 5 by direct heat sealing. In addition, a film having heat sealability is used for the base material layer of the laminated film, or a part corresponding to the notch 6 on the outer surface of the base material layer is partially applied in advance by a known technique such as printing. In the case where the thermoplastic resin coat portion is provided, the outer surfaces of the bottom surface portion 5 are heat-sealed at both side ends of the bottom surface portion 5 when the side end seal portions 8 and 8a are heat sealed, thereby providing self-supporting properties. . In this case, the notch 6 may not be provided. Moreover, the opening part 8b as a filling port of the content is heat-sealed and sealed after filling the content. The starting point of the laminated sheet is not limited to the back wall 4 and may be provided at the lower edge of the front wall 3. Further, the bottom surface seal portion 7 can be formed using a ship bottom shape or a seal pattern such as a combination of an oblique seal and a linear seal.

  With the configuration as described above, filling of liquid contents and the like can be easily performed from the portion of the opening 8b that is largely opened, and the opening 8b can be easily formed after filling of the contents. It can be heat sealed. The self-supporting bag P1 filled with the contents has a gusset portion of the bottom surface portion 5 that widens back and forth, has excellent self-supporting properties, is easy to handle, has a good appearance, and has an excellent display effect. Yes.

  And when taking out the content with which the self-supporting bag P1 was taken out, it can take out by cutting out the taking-out opening 9 (part shown with the perforation) provided in the corner of the one end of the upper bending part 1. FIG. In the case of a conventional self-supporting bag, when an outlet is provided at the upper corner and the liquid content is taken out, there is an upper seal part and a side end seal part. Although it is closed, the takeout port 9 of the self-standing bag P1 of the present invention is only the side end seal portion 8, and when the contents are poured out, the takeout port 9 opens in a substantially circular shape as shown in FIG. The contents can be easily poured out without the outlet being blocked. Similarly, in the case of powdered contents, the take-out port 9 is opened in a substantially circular shape so that the contents can be taken out smoothly.

  As described above, the self-supporting bag of the present invention has a separate spout made of a plastic pouring cylindrical body fitted into the upper upper corner of the pouch body, or is attached with a narrow width by a heat seal pattern. The formation process is simplified, and the manufacturing process is simplified and the upper part has no sealing part without forming a bulging part by applying a concavo-convex pattern to at least one side part film near the spout part. Further, the amount of the laminated sheet used can be reduced, and the manufacturing cost can be reduced. Furthermore, by providing the bent portion 1 at the upper portion, printing can be performed also at the upper portion, and a continuous design straddling the front wall 3 and the rear wall 4 can be provided. Furthermore, the self-supporting bag of the present invention is a one-piece self-supporting bag that can be automatically filled and packaged by a vertical pillow type automatic packaging machine. In addition, after filling the self-supporting bag of the present invention, as shown in FIG. 6, the gusset portion of the bottom surface portion 5 of the side end seal portions 8 and 8a is folded back and adhered to the back wall 4 side to thereby provide the design and self-supporting stability. Can increase the sex. As for the bonding method, it is possible to use spot bonding with a hot melt adhesive, label application, or heat sealing method when a heat-sealable film or heat-sealable film is used as a substrate. it can.

It is a top view of one embodiment of a self-supporting bag concerning the present invention. It is sectional drawing of the AA line of FIG. It is a figure explaining the extraction | pouring state with the self-supporting bag concerning this invention. It is sectional drawing equivalent to the AA line of FIG. 1 of the conventional one-piece type self-supporting bag. It is sectional drawing equivalent to the AA line of FIG. 1 of the conventional two-piece type self-supporting bag. It is a perspective view explaining other embodiment of the self-supporting bag concerning this invention.

Explanation of symbols

P1 Self-supporting bag P2 Conventional one-piece self-supporting bag P3 Conventional two-piece self-supporting bag 1 Folded part 2 Laminated sheet 3 Front wall 4 Back wall 5, 35 Bottom part 6 Notch part 7 Bottom part seal part 8, 8a Side end Seal part 8b Opening part 9 Take-out port

Claims (1)

It is composed of a single laminated sheet having a heat-adhesive resin layer on one side, and has a front wall and a back wall, and a gusset part formed by bending inwardly at the lower ends of the front wall and the back wall, It is a self-supporting bag that includes a bottom seal part and in which liquid or powder content is packaged.
One of the end seal parts on both sides is formed of a seal part that is heat sealed after filling the contents and a seal part that is continuous at both ends,
While the end facing the bottom seal part is a bent part where the front wall and the back wall are continuous,
A self-supporting bag, wherein a take- out port is provided to take out the filled contents by cutting out only a corner portion at one end of the bent portion.

Images