JP2004122730A - Bag making method for pouch container and base material for bag of pouch container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simply, efficient bag making method for a pouch container and a base material for a bag of a pouch container. <P>SOLUTION: While delivering and sending a band sheet S1 for forming a barrel member 11 from a sheet roll R1, a band sheet S2 delivered from a sheet roll R2 is folded as twofold in the width direction and then successively cut at a definite length to form a two folded sheet FS to become a gusset sheet 14, and the two folded sheet FS is successively sent out on the upper surface of the band sheet S on the way of the sending out, and temporarily tacked. Successively, after the band sheet S1 is formed in to a cylindrical form, while the two folded sheet FS tacked temporarily is heat sealed with the band sheet S1 formed in to a cylindrical form, by successively cutting it, the barrel member 11 with a bottom gusset part 13 is formed and finally a spout is attached to the barrel member 11. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a bag making method for a pouch container having a bottom gusset portion and a pouch container bag making base material used for bag making of a pouch container.
[0002]
[Prior art]
As a pouch container having a bottom gusset portion, for example, there is one shown in FIG. The pouch container 50 includes a container body 51 formed of a flexible sheet, and a spout 54 serving as a spout or a spout formed of a thermoadhesive resin attached to the container body 51. The main body 51 has a bottom gusset formed by sandwiching the folded gusset sheet 53 into the lower end opening of the cylindrical body member 52 and heat sealing the peripheral edge of the gusset sheet 53 to the body member 52. I have.
[0003]
The pouch container 50 configured as described above is manufactured as follows. First, as shown in FIG. 12, a long strip-shaped flexible sheet S whose inner surface has heat sealing property is folded back so that both side edges in the width direction thereof abut each other, and the abutting portion is joined from the inner surface side. Then, a thermo-adhesive resin tape T in which a wide single-layer thermo-adhesive resin tape T2 is superimposed on a multi-layer thermo-adhesive resin tape T1 is attached to form a cylindrical shape, and this is sequentially formed into a predetermined length. By cutting, a tubular body member 52 folded flat is formed.
[0004]
Next, as shown in FIG. 13, the upper left and right corners of the body member 52 are cut off diagonally and the lower ends are cut open along the left and right fold lines to form the upper inclined edge E2 and the lower side edge E3. I do.
[0005]
Then, as shown in FIG. 14A, a gusset sheet 53 having two cut-off portions 53a at both side edges, which is made of the flexible sheet, is sandwiched at the lower end of the cut-out trunk member 52. As shown in b), the peripheral edge of the gusset sheet 53 is heat-sealed to the lower side edge E3 and the lower edge E4 of the body member 52 (a portion indicated by oblique lines is a heat-sealing area), and the gusset sheet 53 is cut off at the cutout 53a. A bottom gusset portion is formed by partially heat-sealing the lower side edges E3 of the body member 52 (a portion indicated by hatching is a heat-sealing region).
[0006]
Finally, when the upper inclined edge E2 of the body member 52 is heat-sealed with each other and the upper edge E1 is heat-sealed with the spout 54 sandwiched between the upper ends of the body member 52, the self-sustainability as shown in FIG. Is completed (for example, see Patent Document 1).
[0007]
[Patent Document 1]
JP 2001-171689 A (Page 3, FIGS. 3 and 4)
[0008]
[Problems to be solved by the invention]
However, in the bag making method as described above, after the cylindrical body member 52 that is folded flat is once formed, the lower side edge E3 of the body member 52 is cut open, and the lower end of the cut body member 52 is opened. Since the gusset sheet 53 is sandwiched between the portions and the periphery of the gusset sheet 53 must be heat-sealed to the body member 52, a series of operations from the formation of the body member 52 to the formation of the bottom gusset portion can be continuously performed. This is not possible, and the number of steps required for bag making of the pouch container also increases, so that there is a problem that bag making of the pouch container cannot be performed efficiently.
[0009]
Further, in order to sandwich the gusset sheet 53 at the lower end of the cylindrical body member 52, the lower end of the cut-out body member 52 must be suctioned to separate the gusset sheet 53 from each other. In addition, there is a problem in that the gusset sheet 53 is difficult to pinch accurately at a predetermined position of the lower end portion of the body member 52 separated from each other so as not to be displaced.
[0010]
Therefore, an object of the present invention is to provide a pouch container bag making method and a pouch container bag making base material that can easily and efficiently make this kind of pouch container.
[0011]
Means for Solving the Problems and Their Effects
In order to solve the above-mentioned problem, the invention according to claim 1 is a bag making method for a pouch container having a bottom gusset portion, wherein the bottom gusset portion is formed at a predetermined position on a long strip-shaped sheet. The gusset sheet is temporarily fixed to the two-fold sheet or the folded tubular sheet, and the two-fold sheet or the tubular sheet is temporarily fixed after forming the temporarily fixed band-shaped sheet into a tubular shape. The heat-sealing the gusset sheet to a belt-shaped sheet formed in a tubular shape, and cutting the gusset sheet to form a body member having a bottom gusset portion at a lower end opening. The present invention provides a method for making a container.
[0012]
As described above, in this bag making method, a gusset sheet, a two-fold sheet or a folded tubular sheet is temporarily fixed to a belt-like sheet for forming a body member of a pouch container. After the belt-shaped sheet is formed into a tubular shape, the temporarily fixed gusset sheet is heat-sealed to the tubular belt-shaped sheet while being cut to form a body member having a bottom gusset portion. As a result, the forming operation of the body member and the forming operation of the bottom gusset portion can be performed continuously, and the tubular body once formed to sandwich the gusset sheet as in the conventional bag making method. The pouch container eliminates the need for the step of cutting and opening the lower end of the member, and eliminates the need to perform a cumbersome operation such as inserting a gusset sheet into the lower end of the cut body member. It is possible to efficiently Seibukuro.
[0013]
Further, as in the invention according to claim 2, a pouch container bag-forming base material used when manufacturing a pouch container in which a bottom gusset portion is formed at a lower end opening of a cylindrical body member. A long band-shaped sheet for forming the trunk member is temporarily fixed at a predetermined position thereof to a gusset sheet for forming the bottom gusset portion, a folded sheet or a folded cylindrical sheet. A pouch container formed by winding a two-fold sheet or a tubular sheet that is formed in a tubular shape and temporarily fixed to a belt-shaped sheet that is formed in a tubular shape, and then wound in a roll shape. When the bag base material is manufactured, when the pouch container is manufactured, the pouch container base material is fed out and sequentially cut at a predetermined cutting position, so that the bottom gusset portion is formed at the lower end opening. Torso with Wood and can be efficiently formed.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings. A pouch container 1 shown in FIGS. 1 (a) to 1 (c) is for filling a liquid or fluid such as a beverage or a detergent, and has a heat-sealing property of a linear low-density polyethylene film having a thickness of 100 μm. A container body 10 foldable into a flat state formed by a flexible sheet having a 15 μm-thick biaxially stretched polyamide film (outer layer) laminated on the outer surface of the (inner layer), and a heat-adhesive property attached to the container body 10 The spout 20 is a spout or spout made of resin. The spout 20 can be opened and closed by a screw cap 21 at a spout or a spout.
[0015]
As shown in FIGS. 1A and 1B, the container body 10 includes a cylindrical body member 11 and a bottom gusset portion 13 that closes a lower end opening of the body member 11. The spout 20 is heat-sealed to the upper edge E <b> 1 of the body member 11 while being sandwiched between the upper end openings of the body member 11.
[0016]
The body member 11 is formed in a tubular shape by abutting the both side edges of one exterior sheet 12 made of the flexible sheet with each other, and affixing the abutting portion with tape from the inner surface side. Upper inclined edges E2 formed by obliquely cutting left and right upper corners in a state of being folded flat are heat-sealed to each other.
[0017]
As shown in FIG. 1C, the bottom gusset portion 13 sandwiches a folded gusset sheet 14 made of the flexible sheet at a lower end portion of the body member 11 which is folded flat. 14 is formed by heat sealing the peripheral edge of the body member 11 to the lower side edge E3 and the lower edge E4. The shaded areas in FIGS. 1A, 1B, and 1C are heat seal areas.
[0018]
The pouch container 1 configured as described above is manufactured as follows. First, as shown in FIG. 2, a long strip-shaped sheet S1 formed of the above-mentioned flexible sheet for forming the body member 11 is unwound from a sheet roll R1 to form an inner layer having a heat-sealing property (linear low-layer). (Density polyethylene film) side up.
[0019]
Subsequently, as shown in FIG. 2, a long strip-shaped sheet S2 formed of a similar flexible sheet is fed out from a sheet roll R2 installed on one side of the delivery path of the strip-shaped sheet S1, and the heat sealing property is improved. A two-fold sheet that becomes the gusset sheet 14 by being folded in two in the width direction so that the inner layer (linear low-density polyethylene film) side of the gusset sheet 14 faces outward, and then sequentially cut to a predetermined length (the width of the gusset sheet 14). While forming the FS, the two-fold sheet FS is sequentially sent out to the upper surface of the belt-shaped sheet S that is being sent. As shown in FIG. 3, a stopper ST is provided at a predetermined position in the width direction of the upper surface of the belt-shaped sheet S1. By abutting on ST, the belt-shaped sheet S1 is positioned at the center in the width direction.
[0020]
Further, as a method of supplying the two-folded sheet FS to the belt-shaped sheet S1, as shown in FIG. 2, the delivery roller sandwiching the two-folded sheet FS is rotationally driven to supply the two-folded sheet FS to the belt-shaped sheet S1. As shown in FIG. 4A, in addition to the driving roller system, the two-fold sheet FS is sucked and suspended by the suspending means BH having a suction function, and is moved to a predetermined position of the belt-shaped sheet S1. After that, the suction of the two-folded sheet FS by the suspending means BH is released to supply the two-folded sheet FS to the belt-shaped sheet S1 or, as shown in FIG. After the transport-type BS is moved to a predetermined position of the belt-shaped sheet S1 in a state where the two-fold sheet FS accommodated in the sheet is held by suction, the two-fold sheet FS is suctioned by the transport-type BS. By releasing the lifting, it may be supplied Folded sheet FS to the belt-like sheet S1. When the supply method as shown in FIGS. 4A and 4B is adopted, it goes without saying that the positioning means such as the above-described stopper ST is unnecessary.
[0021]
In this manner, the two-folded sheet FS delivered to a predetermined position on the upper surface of the band-shaped sheet S1 has the both edges in the width direction of the band-shaped sheet S1 on the upper surface of the band-shaped sheet S1, as shown by hatching in FIG. By being sealed, it is temporarily fixed to the upper surface of the belt-shaped sheet S. Although the inner surface side of the two-fold sheet FS does not have heat sealing property, the inner layer having heat sealing property on the upper surface side is melted by being heated and protrudes outward from the edge in the width direction to form a band-shaped sheet. If it is made to be welded to S1, the two-fold sheet FS temporarily fixed to the belt-shaped sheet S1 will be held in a folded state without being opened by springback.
[0022]
In addition, as a method of temporarily fixing the two-fold sheet FS to the belt-shaped sheet S1, in addition to the above-described heat sealing, it is also possible to employ an ultrasonic seal, a high-frequency seal, another adhesive, or a temporary fixing by an electrostatic agent, The shape of the seal is not limited to the linear seal as described above, and a point seal may be employed.
[0023]
The band-shaped sheet S to which the two-folded sheet FS is temporarily fixed at a predetermined interval is then folded back so that both side edges in the width direction abut against each other, and the heat-adhesive resin tape T is applied to the abutting portion from the inner surface side. Is formed into a tubular shape by sticking (see FIG. 2). The heat-adhesive resin tape T may be composed of a single-layer heat-adhesive resin. In this case, the heat-adhesive resin layer is dry-laminated on both sides of the tape base material via an adhesive layer. The multilayered thermal adhesive resin tape T1 and the thermal adhesive resin tape T2 having a single-layer structure wider than the thermal adhesive resin tape T1 are laminated. The adhesive layer of the thermo-adhesive resin tape T1 is not exposed by covering the thermo-adhesive resin tape T1 having a multilayer structure with the thermo-adhesive resin tape T2 having a structure.
[0024]
When the belt-shaped sheet S1 is formed in a tubular shape in this way, subsequently, as shown by hatching in FIG. 6, the two-fold sheet FS temporarily fixed to the belt-shaped sheet S1 is formed in a tubular shape. The body member 11 (container main body 10) on which the bottom gusset portion 13 is formed is sequentially heat-sealed to the inner surface of the strip-shaped sheet S1 and is sequentially cut at a predetermined position as shown by a two-dot chain line in FIG. It is completed. At this time, a small piece SP of a predetermined width including a part of the two-fold sheet FS is cut off together with the trunk member 11, but this small piece SP is discarded.
[0025]
As shown in FIG. 7 (a), the body member 11 (container main body 10) thus completed forms upper inclined edges E2 by obliquely cutting left and right upper corners. As shown in FIG. 1B, when the spout 20 is sandwiched between the upper ends of the body members 11 and the upper edge E1 and the upper inclined edge E2 are heat-sealed, a self-supporting pouch container as shown in FIG. 1 is completed. The upper corner may be cut off obliquely after the spout 20 is sandwiched between the upper ends of the body member 11 and heat sealed.
[0026]
As described above, in this bag making method, the two-fold sheet FS serving as the gusset sheet 14 is temporarily fixed to the band-shaped sheet S1 for forming the body member 11 of the pouch container 1 in advance, and the band-shaped sheet S1 is After being formed in a tubular shape, the temporarily-fixed two-fold sheet FS is heat-sealed to the tubular belt-shaped sheet S1 while being cut, thereby cutting the body member 11 having the bottom gusset portion 13. As a result, the bottom gusset portion 13 can be formed at the same time as the body member 11 is formed, and the cylindrical gusset sheet is formed once in order to sandwich the gusset sheet as in the conventional bag making method. The step of cutting and opening the lower end of the torso member is not required, and there is no need to perform a troublesome operation such as inserting a gusset sheet into the lower end of the opened torso member. An inner container 1 can be efficiently Seibukuro.
[0027]
Further, in the conventional bag making method in which the lower end of the body member must be cut open to sandwich the gusset sheet, when heat-sealing the gusset sheet to the body member, in order to join the lower ends of the cut body member, Although a cutout portion must be formed in the gusset sheet, this bag making method does not require the lower end of the body member 11 to be cut open as described above. There is no need to form a part.
[0028]
In the above-described embodiment, the two-fold sheet FS is supplied and temporarily fixed to the upper surface of the belt-shaped sheet S1, but the present invention is not limited to this. For example, as shown in FIG. From the roll R3, a folded tubular sheet TS formed of a similar flexible sheet is fed out, and is sequentially cut to a predetermined length (width of the gusset sheet 14) and supplied to the belt-shaped sheet S1 to be temporarily fixed. It is also possible.
[0029]
As described above, when the tubular sheet TS is temporarily fixed to the upper surface of the belt-shaped sheet S1, the width L of the supplied tubular sheet TS is folded in half as shown in FIGS. 9A and 9B. The length is set to twice the length l of the gusset sheet 14, and the cutting positions c1, c2, c3, c4, c5,... Of the strip-shaped sheet S1 are cut positions c1, c3, c5,. Then, every other cylindrical sheet TS is supplied and temporarily fixed, and after the cylindrical sheet TS temporarily fixed to the cylindrical band sheet S1 is heat-sealed, the band sheet S1 is cut at the cutting position c1, By cutting sequentially at c2, c3, c4, c5,..., the trunk member 11 (container main body 10) on which the bottom gusset portion 13 is formed can be efficiently manufactured without discarding the strip-shaped sheet S1 at all. .
[0030]
However, when this bag-making method is adopted, the directions of the adjacent body members 11 are reversed, so that as shown in FIGS. It is necessary to alternately reverse the direction of Δ ○ □) across the cutting position.
[0031]
Further, in each of the above-described embodiments, the case where the body member 11 having the bottom gusset portion 13 is continuously manufactured from the belt-shaped sheet S1 has been described. For example, as shown in FIGS. 10A and 10B, After forming the strip-shaped sheet S1 to which the two-fold sheet FS and the tubular sheet TS are temporarily fixed into a tubular shape, the temporarily-folded two-fold sheet FS and the tubular sheet TS are converted to the strip-shaped sheet S1 formed into a tubular shape. When the pouch container bag-forming base materials M1 and M2 are manufactured in advance while being wound into a roll while being heat-sealed, the pouch container-forming base material is used when the pouch container 1 is formed. By pulling out M1 and M2 and cutting them sequentially, the body member 11 in which the bottom gusset portion 13 is formed at the lower end opening can be efficiently manufactured.
[0032]
Further, in the above-described embodiment, when the band-shaped sheet S1 to which the two-folded sheet FS and the cylindrical sheet TS are temporarily fixed is formed in a tubular shape, both side edges in the width direction of the band-shaped sheet S1 are butted against each other, and the butting is performed. Although "tape bonding" in which a heat-adhesive resin tape T is bonded to a part is adopted, the present invention is not limited to this, and so-called "gassho bonding" or "envelope bonding" may be employed. It is possible.
[0033]
Further, in the above-described embodiment, a method of making a bag of the pouch container 1 in which the spout 20 is mounted on the container body 10 has been described. However, the present invention is not limited to this, and a pouch container without a spout is also applicable to the present invention. By applying the bag making method, the bag can be made efficiently.
[Brief description of the drawings]
FIG. 1A is a perspective view showing an embodiment of a pouch container manufactured by the bag manufacturing method according to the present invention, FIG. 1B is a side view showing the same pouch container, and FIG. It is a front view showing the state where the pouch container was folded flat.
FIG. 2 is an explanatory diagram for explaining a bag making method according to the first embodiment.
FIG. 3 is an explanatory diagram for explaining a method of positioning a two-fold sheet supplied to a belt-shaped sheet in the bag making method according to the first embodiment.
FIGS. 4A and 4B are explanatory diagrams for explaining another method of supplying a two-fold sheet that can be adopted in the bag making method of the above.
FIG. 5 is a view showing a temporarily-fixed state of the two-fold sheet with respect to the band-shaped sheet in the above-described bag making method.
FIG. 6 is a process chart showing a bag making method according to the embodiment.
FIGS. 7 (a) and 7 (b) are process diagrams showing a bag making method according to the embodiment.
FIG. 8 is an explanatory diagram for explaining another bag-making method employed when bag-making the pouch container.
FIGS. 9 (a) and 9 (b) are process diagrams showing a bag making method according to the embodiment.
FIGS. 10 (a) and (b) are plan views showing a pouch container bag-making base material used for bag-making of the above pouch container.
FIG. 11 is a perspective view showing an example of a pouch container.
FIG. 12 is a process diagram showing a conventional bag-making method employed when bag-making the pouch container.
FIG. 13 is a process chart showing a bag making method of the above.
FIGS. 14 (a) and (b) are process drawings showing a bag making method according to the first embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pouch container 10 Container main body 11 Body member 12 Exterior sheet 13 Bottom gusset part 14 Gusset sheet 20 Spout 21 Screw cap E1 Upper edge E2 Upper inclined edge E3 Lower side edge E4 Lower edge R1, R2, R3 Sheet roll S1, S2 Strip-shaped sheet FS Folded sheet TS Cylindrical sheet T Thermal adhesive resin tape M1, M2 Base material for pouch container bag making

Claims (2)

A bag making method for a pouch container having a bottom gusset portion,
At a predetermined position of the long belt-shaped sheet, a gusset sheet for forming the bottom gusset portion is temporarily fixed to a two-folded sheet or a folded cylindrical sheet,
After forming the two-fold sheet or the tubular sheet to which the tubular sheet is temporarily fixed into a tubular shape,
The heat-sealed gusset sheet temporarily fixed to a tubular band-shaped sheet is cut and cut to form a body member having a bottom gusset portion at a lower end opening. Characteristic pouch container bag making method. A pouch container bag-forming base material used when manufacturing a pouch container in which a bottom gusset portion is formed at a lower end opening of a cylindrical body member,
A long band-shaped sheet for forming the body member was temporarily fixed at a predetermined position thereof to a gusset sheet for forming the bottom gusset portion, a folded sheet or a folded cylindrical sheet. It is characterized by being formed into a tubular shape in a state, and temporarily folding a two-folded sheet or a tubular sheet, which is heat-sealed to a tubular band-shaped sheet, and wound into a roll. Base material for pouch container bag making.

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