JPH0939983A - 3-d paper bag laminated with synthetic resin film and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a 3-D paper bag on which a synthetic resin film is laminated, of which the bottom does not come off even at the time of getting wet or being exposed under a high temperature. SOLUTION: A synthetic resin film 3 is laminated on the whole surface of an exposed part on the lower surface of a bottom part 2, and bottom affixing bonded surfaces being confronted to each other are bonded with an adhesive 7 without inserting the synthetic resin film 3 in-between for a 3-D paper bag 1. Such a solid paper bag 1 is manufactured by specified processes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional paper bag having a flat bottom, and a three-dimensional paper bag having a structure in which a synthetic resin film for waterproofing or the like is laminated on the outer surface of the three-dimensional paper bag, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a three-dimensional paper bag having a flat bottom as shown in FIG. 7 is laminated with a synthetic resin film on its outer surface so as to have excellent waterproof performance, durability performance and the like. Structured ones are provided.

For example, a three-dimensional paper bag (51) shown in FIG. 10 (c) has a rectangular-shaped paper material (52) on one side of which one side edge has a predetermined fixed width, which is a body-gluing margin portion. In the aspect in which the bottom adhesive paste margin portion (54) having a predetermined constant width is left on one side edge portion adjacent to the body adhesive glue margin portion, the synthetic resin film (55) is laminated and joined. , From this paper material (52), glue it with an adhesive (56) such as starch paste,
As shown in FIGS. 10 (a) and 10 (b), the bag is made into a three-dimensional paper bag (51) having a bottom attached thereto.

Further, the three-dimensional paper bag (61) whose bottom is shown in FIG. 11 (c) has a predetermined fixed width only on one side edge of one side of the rectangular paper material (52). In a mode in which the paste margin portion is left, the synthetic resin film (55) is laminated and bonded, and then the paper material (52) is pasted with an adhesive such as starch paste, while the bottom portion is , Figure 11 (a)
As shown in (b), by using the laminated synthetic resin film layer (55) by the hot melt method,
Alternatively, it is made into a three-dimensional paper bag (61) closed and joined by adhesion with an adhesive adhesive.

Here, each paper material (52) laminated with each film (55) was manufactured as follows using the film laminating equipment shown in FIG. That is, in this equipment, (62) is a film unwinding device,
(63) is the adhesive application part, (64) is the adhesive drying part, (65)
Is a laminating unit, (66) is a paper feeding unit, (67) is a film cutting unit, and (69) is a stock unit. In the case of the three-dimensional paper bag (51) as shown in FIG. 10, the film (55) which is narrower than the width of the paper material (52) by the width of the glue margin portion (53) for body attachment is wound. The unwinding device (62) is made to rotate and is prepared. On the other hand, in the case of the three-dimensional paper bag (61) as shown in FIG. 11, the film (55) having the same width as the width of the paper material (52) is wound and provided in the unwinding device (62). .

Then, the film (55) being unwound from the unwinding device (62) is passed through the coating roll (70) in the adhesive coating section (63), and the adhesive (71) is applied to the entire one surface thereof.
Is continuously applied in the feeding direction. afterwards,
The film (55) is passed through the drying section (64) to form an adhesive (71).
To a predetermined degree.

Next, a plurality of rectangular paper materials (5
2) ... and the film (55) with the adhesive (7
The side coated with 1) is directed toward the paper material (52) ..., and is passed between the laminating rolls (72) and (72) in the laminating section (65), and the film (55) is applied to each paper material (52).
Laminate joints so that they hang over.

Then, in the feeding process after laminating and joining,
The film is passed through the film cutting section (67), and only the film (55) is cut along the edge of the upper paper material in the overlapping portion of the paper materials (52) in the course of the passage. After cutting, stock section (6
9), and the film laminated paper materials (52) ... are stocked in the stock section (69).

The cutting portion (67) is, as shown in FIG. 9, orthogonal to the drive roller (74) attached to the rotary shaft of the drive motor (73) and the feeding direction of the paper materials (52). A pair of idle rollers (75) (75), etc., which are arranged at intervals in the direction in which the rollers (74) (75)
The wire (76) is hung over the (75) endlessly, and the blade portion (77) provided on the wire (76) is rotated by the drive motor (73) to change the feeding direction of the paper material (52). By feeding and moving in the orthogonal direction,
Only the film (55) is cut and broken.

[0010]

However, as shown in FIG.
In the three-dimensional paper bag (51) manufactured as shown in (3), there is a problem that the bottom portion (57) is apt to fall out when it gets wet. That is, in this three-dimensional paper bag (51), the glue margin portion (54) for laminating the bottom of the film (55) having a predetermined constant width for laminating the bottom is left, and the glue margin portion (54) is left. An adhesive (56) such as starch paste is applied to the bottom to attach it to the bottom. However, if the width of this glue allowance part (54) is made narrower, the film layer (55) will be wider between the facing areas of the bottom allowance. As a result, the bonding strength of the adhesive (56) cannot be maintained sufficiently. Therefore, it is necessary to secure the width of the margin portion (54) to some extent.
As shown in (c), the bottom part (57) of the three-dimensional paper bag (51)
In the central portion of the lower surface, the paper material (52) itself is exposed without the film layer (55) being present, and moisture permeates into the paper material (52) to reduce the strength of the paper material (52). There were times when I was out of control.

On the other hand, in the three-dimensional paper bag (61) manufactured as shown in FIG. 11, the film layer (55) is present over the entire exposed portion of the bottom surface (57) of the bottom surface of the bag. Even if the bottom part (57) gets wet, the bottom part (57) does not slip out like the three-dimensional paper bag (51). However, if this is exposed to high temperatures, such as when it is placed near a heater such as a train in the winter, the joint portion formed by hot melt or adhesive will deteriorate in joint strength under the influence of the heat. However, there was a case where it went out of control.

In view of the above-mentioned conventional problems, the present invention provides a synthetic resin film laminated three-dimensional paper bag which does not slip out of the bottom regardless of whether the bottom is wet or exposed to high temperature. An object is to provide a method for manufacturing a three-dimensional paper bag.

[0013]

Means for Solving the Problems The above problem is that a synthetic resin film layer is provided on all exposed portions of the bottom surface of the bottom surface, while the bottom surface-bonding opposing surface portions are bonded by an adhesive without interposing a synthetic resin film. This is achieved by a three-dimensional paper bag laminated with a synthetic resin film, which is characterized by being joined.

That is, since the synthetic resin film layer is provided on all exposed portions of the lower surface of the bottom portion, even if the bottom portion gets wet, water does not penetrate into the paper material at the bottom portion. To be prevented.

Moreover, since the bottom sticking joint facing surface portions are joined by the adhesive without the interposition of the synthetic resin film, the bottom sticking joint strength by the adhesive is kept strong even when exposed to a high temperature. From this aspect, it is possible to prevent the bottom from slipping out.

In the present invention, the production of such a three-dimensional paper bag is carried out by applying an adhesive to one surface of a synthetic resin film having a predetermined width which is unwound from the film unwinding device and feeding the film in the feeding path of the film. Along the way, the bottom surface exposed corresponding portion except the bottom margin corresponding portion for sticking to the bottom is applied in a feeding direction to an application pattern having an uneven edge portion in a mode in which it is applied in a predetermined feeding direction. On one surface side of the paper material, the film is laminated and joined with the adhesive-coated side facing the paper material side, and the film is formed on the adhesive pattern area in the feeding process after the laminate bonding. By cutting along the peripheral edge to remove the non-bonded part of the film, after that, using the obtained film-laminated paper material, it is possible to manufacture a three-dimensional paper bag that is body-bonded and bottom-bonded with an adhesive. Characteristic synthetic tree Film is performed by the method of producing a three-dimensional bag that is laminated.

According to this manufacturing method, while the synthetic resin film layer is provided on all exposed portions of the bottom lower surface,
The above-mentioned three-dimensional paper bag in which the bottom surface-bonding facing surface portions are bonded with an adhesive without interposing a synthetic resin film is manufactured in good quality, very easily and with good productivity.

Therefore, the three-dimensional paper bag manufactured by such an inventive method is provided with good quality and at low cost.

In the above-mentioned method of the invention, in the laminating joint, the film is formed on one surface side of a plurality of rectangular paper materials which are fed with their side edge portions abutting each other or overlapping each other in the feeding direction. With the adhesive-coated side facing the paper material side, so that each adhesive application pattern area of the film corresponds to the surface of each paper material, and the non-bonded portion of the film is removed. ,
It is preferable to cut the film along the peripheral edge of the adhesive pattern area, including the steps of separating the paper materials from each other in the feeding process after laminating and joining.

The application of the adhesive to the film is
Using an adhesive coating roll whose outer peripheral portion is formed in a concavo-convex shape of a pattern corresponding to the adhesive coating pattern in the circumferential direction, the adhesive on the outer peripheral surface of the coating roll is unwound from the film unwinding device. It is preferable to perform transfer coating on one side.

Further, the film is cut by using a rotary cutter having a convex blade portion corresponding to the peripheral shape of the adhesive application pattern area on the outer peripheral portion, and the film laminated paper material connected by the film is The film is preferably passed through the rotary cutter with the film side facing the outer peripheral surface side.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described.

The three-dimensional paper bag according to this embodiment is also basically a three-dimensional paper bag (1) as shown in FIG. 7, but the bottom surface (2) of the bottom surface (2) is exposed on all of the lower surface of the OPP, PVC.
While the synthetic resin film layer (3) according to the above is provided, as shown in FIGS. 6 (a) and (b), the bottom sticking joint facing surface portions (5) interpose the synthetic resin film layer (3). It is supposed to be joined with the adhesive (7) without any.

When the three-dimensional paper bag (1) is unfolded, the paper material (4) has a square shape as shown in FIG. On one surface of the paper material (4), a glue margin portion (5) for bottom attachment is provided on one side edge portion, and a body glued on at least one side edge portion adjacent to the glue margin portion (5). The synthetic resin film layer (3) is provided in a mode in which at least the glue margin portion (6) for use is left.
The bottom edge of the bottom layer (2) of the film layer (3) is exposed at the bottom-side glue margin portion (5) side with the paper material (4) folded in the shape of the three-dimensional paper bag (1). The film layer (3) is present on all of the portions, and the film layer (3) is formed on the concave-convex edge portion (23a) in a mode in which the film layer (3) is not substantially present on the bottom-bonding joint surface corresponding portion.

A rectangular paper material (4) laminated with such a film layer (3) is used, folded, and attached to the body with an adhesive agent (7) such as starch paste, and then, as shown in FIG. ) (B)
As shown in FIG.
(C), the three-dimensional paper bag (1) as shown in FIG. 7 is obtained.

Then, in order to manufacture the rectangular paper material (4) on which the film layer (3) is formed in the above-described manner, the equipment as shown in FIG. 1 is used.

In this equipment, (9) is a film unwinding device, (10) is an adhesive applying section, (11) is an adhesive drying section, (12) is a laminating section, (13) is a paper feeding section, ( 14) is a film cutting section, and (15) is a stock section. In addition,
(16) ... is a guide roll.

The film unwinding device (9) is the same as that used in the conventional equipment, and the film (3) having a width larger than that of the paper material (4) is provided in a wound state. There is. In addition, the film (3) may be narrower than the width of the paper material (4) by the width of the glue margin portion (6) for body sticking, or equivalent to the width of the paper material (4). It may have a width of.

The adhesive application section (10) applies the laminating adhesive (17) to one surface of the film (3) from the film unwinding device (9). ) And the laminating section (12) are provided in the middle of the feeding path. The adhesive applying section (10) has a configuration different from that of the applying section (63) in the conventional equipment. That is, as shown in FIG. 2, in this coating section (10), (19) is an adhesive application roll, (20) is a press roll, (21) is an adhesive container, (22) ... Is an adhesive supply. It is a roll.

The adhesive-applying roll (19) has an adhesive agent (17) on one surface of the synthetic resin film (3) which is unwound from the film unwinding device (9) and a margin for pasting on the bottom. Coating pattern (23) having uneven edges (23a) such that the corresponding bottom surface is exposed except for the corresponding portion
Then, it is applied in the feeding direction. The total circumference is the length of the coating pattern (23) and the pattern (23) (23).
It is set to correspond to the interval and the total length. Then, the outer peripheral portion of the coating roll (19) is formed in an uneven shape having a convex surface (24) for coating a pattern corresponding to the adhesive coating pattern (23) in the circumferential direction thereof,
The coating roll (19) is rotated while feeding the film (3) with one surface of the film (3) in contact with the coating roll (19), so that the adhesive (17) attached to the convex surface (24). ) Is transferred to one surface of the film (3) and passed over to be applied in the above application pattern. Further, the width of the convex surface (24) of the coating roll (19) is designed to be narrower than the width of the film (3), and the adhesive (17) has a predetermined width in the middle portion of the film (3) excluding both side edges. Range, that is, the paste margin portion (6) on the paper material (4)
Is applied in such a manner as to leave.

The drying unit (11) shown in FIG. 1 dries the adhesive (17) applied to the film (3) to a predetermined extent, and includes an adhesive applying unit (10) and a laminating unit (12). )
It is provided in the middle of the feeding path that connects to and, and is the same as in the conventional equipment.

The paper feed section (13) is composed of a plurality of rectangular paper materials (4).
, The side edges thereof are overlapped with each other, and the pair of laminating rolls (25) (2
5) The paper materials (4), which are stacked in the paper material stocking section (26), are sequentially supplied from above from above by a sucker type transfer device (not shown). It is designed so that it is sent to 27) and fed to the laminating section (12), which is the same as in conventional equipment.

As shown in FIG. 3, the laminating section (12) is provided with a pair of laminating rolls (25) (25), and a paper material (4) and a film are provided between these rolls (25) (25). The film (3) is laminated and joined to the paper material (4) by being introduced so as to be combined with (3).
This is the same as in conventional equipment.

As shown in FIG. 1, the film cutting section (14) has a laminating section (12) and a stock section (1).
Each paper material (4) ...
The film (3) is cut along the peripheral edge of the adhesive coating pattern (23) area, including making it mutually separated, and its structure is different from the cutting part (67) in the conventional equipment. To do. That is, as shown in FIG. 4, in the cutting portion (14), (29) is a rotary cutter,
(30) is a press roll. The entire circumference of the rotary cutter (29) is the adhesive application pattern (23).
Is set to correspond to the total length of the length of the pattern and the space distance between the patterns (23) and (23). The rotary cutter (29) has, on its outer peripheral portion, a push-cut convex blade portion (31) corresponding to the peripheral shape of the adhesive application pattern (23) region. The convex blade portion (31) is a film (3)
A curved blade (31a) that cuts along the uneven edge (23a) of the adhesive application pattern (23), and the side facing the uneven edge (23a) of the adhesive application pattern (23). A straight blade (31b) that cuts along the edge and a pair of straight blades (31c) (31d) that cut along both edges of the adhesive application pattern (23) are provided in a loop shape. The film (3) laminated on the paper material (4) in the laminating section (12) passes through the rotary cutter (29), so that the film (3) becomes an adhesive pattern (23). It is designed to be cut along the entire circumference of the region.

The stock section (15) is for stacking the paper materials (4) on which the films (3) are laminated in a stacked state, and is the same as in the conventional equipment.

The film-laminated paper material (4) is manufactured as follows using the above equipment. That is, as shown in FIG. 1, the film (3) unwound from the film unwinding device (9) is first fed in the feeding process.
By passing through the adhesive application section (10), the adhesive (17) is applied to one surface of the adhesive application section (23) at a predetermined application pattern (23) having an uneven edge (23a) at intervals in the feed direction. Will be done. Then, the film (3) is dried by the drying section (11) while being guided by the guide rolls (16), to dry the adhesive (17) to a predetermined degree, and then the laminating roll of the laminating section (12). It is sent between (25) and (25).

On the other hand, the paper materials (4) ... Are fed from the paper feeding section (13) to the laminating section (12) with their side edge portions being overlapped in the feeding direction.

Then, in the laminating section (12), the adhesive coating patterns (23) are applied to the film (3) with the side coated with the adhesive (17) facing the paper material (4). )
The region is fed so as to correspond to the surface of each paper material (4), and the film (3) and the paper materials (4) are laminated and joined.

Then, in the feeding process after the lamination joining, each paper material (4) is separated from each other by passing through the film cutting section (14) and by the convex blade section (31) of the rotary cutter (29). Film including that (3)
Are cut along the periphery of the adhesive pattern (23) area. The unbonded part (32) of the film is the stock part (15).
Before entering, it may be mechanically wound up or manually removed by an operator. Then, the laminated paper materials (4) ... Of the film (3) are sequentially stocked in a stock state in the stock section (15).

Using the film-laminated paper material (4) produced in this way, fold it as described above and stick it on the body or bottom with an adhesive (7) such as starch paste. By making a bag by the above method, a three-dimensional paper bag (1) as shown in FIGS. 6 and 7 is obtained. The adhesive (7) used for bottom attachment and the like is starch paste, which is generally inexpensive, but is not limited to this and various adhesives such as other water-based glue may be used.

As described above, the three-dimensional paper bag (1) is used.
Is provided with a synthetic resin film layer (3) on all exposed portions of the bottom surface of the bottom portion (2), while the bottom-bonding opposing surface portions (5) are adhesive without interposing the synthetic resin film (3). Since they are joined in (7), even if the outer surface of the bottom part (2) gets wet, water does not penetrate into the paper material of the bottom part (2), and even if it gets wet, the bottom does not escape, Even if it is exposed, the bonding strength of the adhesive (7) is kept strong, and there is no possibility of bottoming out.

Since such a three-dimensional paper bag (1) is manufactured by the method as described above, it should be manufactured with good quality and very easily and with good productivity as in the conventional case. You can In particular, in the method of laminating the film (3) on the paper material (4), only the adhesive application part (10) and the film cutting part (14) in the equipment are modified so as to be compatible with the method of the present invention. Other than that, the conventional equipment can be used as it is, and the film-laminated paper material (4), and thus the three-dimensional paper bag (1) can be manufactured advantageously in terms of equipment and cost.

Moreover, the adhesive (17) to the film (3)
As shown in FIG. 2, the application of the adhesive coating roll (19) whose outer peripheral portion is formed in the circumferential direction in a concavo-convex shape (24) of a pattern corresponding to the adhesive coating pattern (23), Since the adhesive (17) on the outer peripheral surface of the coating roll is transferred and applied onto one side of the film (3) being unwound from the film unwinding device (9), the film (3) is used. It is possible to apply the adhesive (17) while continuously feeding without intermittently feeding
The application of the adhesive (17) can be performed efficiently and mechanically as in the conventional case.

Further, as shown in FIG. 4, the film (3) is cut by a rotary cutter (FIG. 4) having a convex blade portion (31) corresponding to the peripheral shape of the adhesive coating pattern (23) region on the outer peripheral portion ( 29), the film-laminated paper material (4) connected by the film (3) is turned so that the film (3) side faces the outer peripheral surface side of the rotary cutter (29). ), The paper material (4) to which the film (3) is adhered can be cut while continuously feeding with a simple structure without intermittent stop feeding of the group. Can be done efficiently.

In particular, in this embodiment, the rotary cutter (29) having the loop-shaped cutting blade portion (31) is used to cut the film (3) over the entire periphery of the adhesive application pattern (29) region. By doing so, the non-adhesive portion (32) of the film (3) is continuously connected instead of being cut into small pieces, and therefore it can be removed conveniently.

In the above embodiment, the adhesive coating pattern (23) is configured such that the uneven edge portion (23a) on the bottom sticking side is fed to the front side in the feeding direction of the film (3). Depending on the folding state of the paper material (4) and the like, the uneven edge portion (23a) may be directed to the rear side in the feeding direction of the film (3) or may be directed to the lateral side. Further, in the above embodiment, the plurality of paper materials (4) ...
In the feeding direction, the side edges are overlapped with each other and fed into the laminating section (12). However, the paper material (4) ... ), Or use a paper material made of continuous paper such as roll paper and send it to the laminating section (12), and at a suitable stage after film laminating the paper material to a predetermined length. It may be possible to cut into units.

[0047]

As described above, according to the three-dimensional paper bag laminated with the synthetic resin film of the present invention, the synthetic resin film layer is provided on all of the bottom lower surface exposed portions,
Since the bottom pasting and joining opposite surface portions are joined by an adhesive without interposing a synthetic resin film, even if the bottom portion gets wet, moisture does not penetrate into the paper material of the bottom portion, and further, at a high temperature. Even if it is exposed, the bottom bonding strength of the adhesive is kept strong, and therefore, it is possible to effectively prevent unintentional omission of the bottom.

Further, in the manufacturing method of the present invention, an adhesive is applied to one surface of a synthetic resin film having a predetermined width which is unwound from the film unwinding device, in the middle of the feeding path of the film, for bottom application. Except for the portion corresponding to the paste margin, all the bottom surface exposed corresponding portion is applied in a feeding direction to a coating pattern having an uneven edge portion of a mode in which one of the paper materials is fed in a predetermined feeding direction. On the surface side, the film is laminated and bonded with the adhesive-coated side facing the paper material side, and the film is cut along the peripheral edge of the adhesive pattern area in the feeding process after the laminated bonding. The non-bonded portion of the film is removed, and then the resulting film-laminated paper material is used to manufacture a three-dimensional paper bag that is body-bonded and bottom-bonded with an adhesive. Layer is bottom bottom On the other hand, the three-sided paper bag, which is provided on all of the protruding parts, has a structure in which the bottom surface-bonding opposing surface parts are bonded with an adhesive without interposing a synthetic resin film in good quality and very easily. It can be manufactured with high productivity.

Therefore, the three-dimensional paper bag produced by the method of the present invention can be of good quality and can be cost-effective.

Further, in the above-mentioned method of the invention, in the laminating joining, the film is applied to one surface side of a plurality of rectangular paper materials which are fed with their side edges abutting each other or overlapping each other in the feeding direction. , The adhesive-coated side is directed to the paper material side, and each adhesive application pattern area of the film is fed so as to correspond to the surface of each paper material, and the non-bonded portion of the film is removed. By cutting the film along the periphery of the adhesive pattern area, including making each paper material in a separated state in the feeding process after laminating and joining,
Almost the conventional paper feeding mechanism and feeding mechanism can be used as they are, and the above-mentioned three-dimensional paper bag can be manufactured very advantageously in terms of equipment and cost.

Further, in the above-mentioned method of the present invention, the adhesive is applied to the film by using an adhesive-applying roll whose outer peripheral portion is formed in an uneven shape of a pattern corresponding to the adhesive-applying pattern in the circumferential direction, By applying the adhesive on the outer peripheral surface of the coating roll to one side of the film that is being unwound from the film unwinding device, the adhesive is applied while continuously feeding the film without intermittently stopping the feeding. It is possible to manufacture three-dimensional paper bags with high productivity as before.

Further, the film is cut by using a rotary cutter having a convex blade portion corresponding to the peripheral shape of the adhesive application pattern area on the outer peripheral portion, and the film laminated paper material connected by the film is By turning the film side toward the outer peripheral surface of the rotary cutter and passing it through the rotary cutter, the paper material group to which the film is adhered is cut while being continuously fed without intermittent stop feeding. Therefore, the three-dimensional paper bag can be manufactured with high productivity as before.

[Brief description of drawings]

FIG. 1 is a schematic side view of equipment used in a method according to an embodiment.

2A and 2B are views showing an adhesive application part, wherein FIG. 2A is a side view and FIG. 2B is a view taken along the line II of FIG. 2A.

3A and 3B are views showing a laminating section, FIG. 3A is a plan view, and FIG. 3B is a side view showing a separated state.

FIG. 4 is a plan view showing a cutting portion, and FIG. 4 (b) is a side view showing a separated state.

FIG. 5 is a plan view of a film laminated paper material.

6A to 6C are bottom views of the three-dimensional paper bag according to the embodiment, which sequentially shows the bag making process of the bottom portion.

FIG. 7 is a perspective view of a paper bag.

FIG. 8 is a schematic side view of equipment used in a method according to a conventional example.

FIG. 9 is a front view of a conventional cutting section.

FIGS. 10A to 10C are bottom views of a three-dimensional paper bag according to a conventional example, and sequentially showing the bag making process of the bottom portion.

11A to 11C are bottom views of a three-dimensional paper bag sequentially showing a bag making process of a bottom portion according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Three-dimensional paper bag 2 ... Bottom part 3 ... Film 4 ... Paper material 7 ... Adhesive 9 ... Unwinding device 10 ... Coating part 12 ... Laminating part 13 ... Paper feeding part 14 ... Cutting part 15 ... Stock part 17 ... Adhesive 19 ... Coating roll 23 ... Coating pattern 29 ... Rotary cutter 31 ... Convex blade

Claims (6)

[Claims] 1. A synthetic resin film layer is provided on all exposed portions of a bottom lower surface, and bottom facing bonding opposing surface portions are bonded by an adhesive without interposing a synthetic resin film. A three-dimensional paper bag laminated with a synthetic resin film. 2. An adhesive is applied to one surface of a synthetic resin film having a predetermined width which is unwound from the film unwinding device.
In the middle of the feeding path of the film, coating is performed in the feeding direction on a coating pattern having an uneven edge portion in which all the bottom lower surface exposed corresponding portion is applied except the glue margin corresponding portion for bottom attachment, in a predetermined direction. On one surface side of the paper material fed in the feeding direction, the film is laminated and joined with the adhesive-coated side facing the paper material side, and in the feeding process after the laminate joining, The film is cut along the periphery of the adhesive pattern area to remove the non-bonded part of the film, and then the obtained film-laminated paper material is used to form a three-dimensional structure with the body and bottom attached with an adhesive. A method for producing a three-dimensional paper bag laminated with a synthetic resin film, which comprises producing a paper bag. 3. The laminate joining is performed on one surface side of a plurality of rectangular paper materials that are fed with side edge portions abutting or superposing in a feeding direction,
The film, with its adhesive-coated side facing the paper material side, is fed so that each adhesive-applied pattern area of the film corresponds to the surface of each paper material, The synthetic resin film according to claim 2, wherein the removal is performed by cutting the film along the peripheral edge of the adhesive pattern area, including making the respective paper materials in a separated state in a feeding process after laminating and joining. A method for manufacturing a laminated three-dimensional paper bag. 4. The adhesive is applied to the film by using an adhesive-applying roll whose outer peripheral portion is formed in a concavo-convex shape having a pattern corresponding to the adhesive-applying pattern in the circumferential direction. The method for producing a three-dimensional paper bag laminated with the synthetic resin film according to claim 2 or 3, which is performed by transferring and applying an adhesive onto one side of the film that is unwound from the film unwinding device. 5. The film is cut by using a rotary cutter having a convex blade portion corresponding to the peripheral shape of the adhesive application pattern region on the outer peripheral portion of the film-laminated paper material connected by the film. The method for producing a three-dimensional paper bag laminated with the synthetic resin film according to claim 2, 3, or 4, which is performed by passing the film through the rotary cutter with the film side facing the outer peripheral surface side. 6. An adhesive is applied to one surface of a synthetic resin film having a predetermined width which is unwound from the film unwinding device.
In the middle of the feeding path of the film, coating is performed in the feeding direction on a coating pattern having an uneven edge portion in which all the bottom lower surface exposed corresponding portion is applied except the glue margin corresponding portion for bottom attachment, in a predetermined direction. On one surface side of the paper material fed in the feeding direction, the film is laminated and joined with the adhesive-coated side facing the paper material side, and in the feeding process after the laminate joining, The film is cut along the periphery of the adhesive pattern area to remove the non-bonded part of the film, and then the obtained film-laminated paper material is used to form a three-dimensional structure with the body and bottom attached with an adhesive. A three-dimensional paper bag laminated with a synthetic resin film, which is manufactured in a paper bag.