JP2023014659A - Food packaging bag and its manufacturing method - Google Patents

Abstract

To provide a food packaging bag that can suppress used amount of resin and its manufacturing method.SOLUTION: It includes a sheet-shaped first packaging material 10, a sheet-shaped second packaging material 20 that is attached to the first packaging material 10 and forms an accommodating portion 33 that accommodates a sandwich 100 in between the first packaging material 10, and an opening 34 that opens the accommodating portion 33 to the outside, at least the first packaging material 10 out of the first packaging material 10 and the second packaging material 20 has, on at least part of it, a window portion 14 made of a visible paper material through which the sandwich 100 accommodated in the accommodating portion 33 can be visually recognized from outside.SELECTED DRAWING: Figure 7

Description

TECHNICAL FIELD The present invention relates to a food packaging bag and a manufacturing method thereof.

2. Description of the Related Art Conventionally, foods such as sandwiches, cooked breads, sponge cakes, and pastries are packaged in packaging bags and sold at convenience stores, supermarkets, and the like. For example, in the case of a right-angled triangle sandwich in which ingredients are sandwiched between loaves of bread, a pair of resin-made films are stacked to form a bag body sealed on three sides, and the sandwich is inserted into the packaging bag for packaging. is known (see Patent Document 1, etc.).

JP 2017-171326 A

This type of packaging bag is generally made of a resin film such as polyethylene, as described in Patent Document 1 above. However, in recent years, there has been concern about environmental pollution caused by resin product waste, so-called plastic waste, and this problem has extended to food packaging bags.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a food packaging bag capable of suppressing the amount of resin used, and a method of manufacturing the same.

(1) The food packaging bag of the present invention includes a sheet-like first packaging material, and an accommodating portion that is attached to the first packaging material and accommodates the food product between the first packaging material and the first packaging material. At least the first packaging material of the first packaging material and the second packaging material is provided with a sheet-like second packaging material to be formed, and an opening that opens the accommodating portion to the outside. has, at least in part thereof, a window portion made of a visible paper material through which the food stored in the storage portion can be visually recognized from the outside.

(2) In (1), the first packaging material, including the window portion, is entirely made of paper material, and the portion other than the window portion is less visible than the paper material of the window portion. It is preferably made of material.

(3) In (1) or (2), it is preferable that the second packaging material has a folded portion that closes the opening, and at least the folded portion is made of a resin film.

(4) In (1) or (2), both the first packaging material and the second packaging material are preferably made of paper material.

(5) In any one of (1) to (4), the food stored in the storage portion is a substantially triangular sandwich, and the window portion is arranged at a position facing the ingredients of the sandwich. is preferred.

(6) A method for manufacturing a food packaging bag of the present invention is a method for manufacturing a food packaging bag according to any one of (1) to (5), wherein a plurality of the first packaging materials are formed. The first raw fabric and the second raw fabric capable of forming the plurality of second packaging materials are fed out and conveyed in a predetermined conveying direction, while the first raw fabric and the second a step of superimposing two original fabrics, and sealing the superimposed first original fabric and the second original fabric with each other such that the opening remains on one side in the conveying direction. a step of forming the food packaging bag so as to be continuously arranged in the conveying direction by forming a seal portion, and a step of dividing the plurality of the seal portions in the conveying direction to form a plurality of the and a step of sequentially cutting the food packaging bag.

(7) In (6), the food packaging bag has a substantially trapezoidal shape and has the opening at one end in the height direction, and the opening is adjacent in the conveying direction. It is preferable that they are alternately arranged on both sides in the conveying direction in the food packaging bag.

ADVANTAGE OF THE INVENTION According to this invention, the packaging bag for foodstuffs which can control the usage-amount of resin, and its manufacturing method can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the sandwich packaged by the packaging bag for foodstuffs and the said packaging bag which concerns on 1st Embodiment. 1 is an exploded perspective view of a food packaging bag according to a first embodiment; FIG. FIG. 2 is a plan view of the food packaging bag according to the first embodiment, viewed from the first packaging material side on the front side. FIG. 2 is a plan view of the food packaging bag according to the first embodiment, viewed from the rear side of the second packaging material. FIG. 5 is a cross-sectional view taken along line VV of FIG. 4; FIG. 4 is a perspective view showing the procedure of packaging a sandwich with the food packaging bag according to the first embodiment in order from (a) to (d). FIG. 2 is a perspective view showing a state in which a sandwich is packaged with the food packaging bag according to the first embodiment; BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows typically the manufacturing line which enforces the manufacturing method of the packaging bag for food which concerns on 1st Embodiment. FIG. 4 is a perspective view schematically showing a method of manufacturing a first raw fabric in the method of manufacturing the food packaging bag according to the first embodiment; 9 is a plan view showing enlarged steps D, E, and F in the production line shown in FIG. 8. FIG. It is an exploded perspective view of a packaging bag for food concerning a 2nd embodiment. FIG. 10 is a plan view of the food packaging bag according to the second embodiment, viewed from the first packaging material side on the front side. FIG. 10 is a plan view of the food packaging bag according to the second embodiment, viewed from the rear side of the second packaging material. 14 is a cross-sectional view taken along line XIV-XIV of FIG. 13; FIG.

Hereinafter, embodiments will be described with reference to the drawings.
(First embodiment)
FIG. 1 shows a food packaging bag (hereinafter abbreviated as packaging bag) 1 according to the first embodiment and a right triangle sandwich 100 accommodated in this packaging bag 1. As shown in FIG. That is, the packaging bag 1 of the first embodiment is a bag for packaging a sandwich 100 in the shape of a right triangle. A sandwich 100 has a plurality of right triangle-shaped bread 101 and an ingredient 102 sandwiched between two pieces of bread 101 . The sandwich 100 is inserted into the packaging bag 1 from one non-right-angled top 105 and wrapped by the packaging bag 1 .

As shown in FIGS. 2 to 5, the packaging bag 1 includes a sheet-like first packaging material 10 forming the front side and a sheet-like second wrapping material 20 forming the back side. 2 is an exploded perspective view of the packaging bag 1, FIG. 3 is a plan view of the packaging bag 1 viewed from the side of the first packaging material 10 (front side), and FIG. 4 is the packaging bag from the side of the second packaging material 20 (back side). 1, and FIG. 5 is a cross-sectional view taken along the line VV of FIG.

As shown in FIGS. 2 to 4, each of the first packaging material 10 and the second packaging material 20 has a vertically long, left-right symmetrical trapezoidal shape and an approximately isosceles triangular shape. have the same shape and dimensions. The packaging bag 1 is formed in a bag shape by stacking the first packaging material 10 and the second packaging material 20 in the same shape, and bonding the seal portions 30 on three sides to each other. As shown in FIGS. 3 and 4, the three-way seal portion 30 includes a two-stage top seal portion 31 provided on one end side (upper side in FIGS. 3 and 4) in the length direction L of the packaging bag 1, and side seal portions 32 on both sides in the width direction W. Each of the top seal portions 31 is connected to a side seal portion 32 .

As shown in FIG. 1 , an accommodation portion 33 for accommodating the sandwich 100 is formed between the first packaging material 10 and the second packaging material 20 . A portion of the outer peripheral edge of the packaging bag 1 other than the seal portion 30 forms an opening portion 34 that is spaced apart from each other and opens the accommodating portion 33 to the outside. The opening 34 is provided on the other end side (lower side in FIGS. 3 and 4) in the length direction and on the side of the bottom portion 7 described later. Sandwich 100 is inserted into container 33 through opening 34 .

As shown in FIG. 3, the packaging bag 1 includes a top portion 5 on one longitudinal end, a bag main body portion 6 including an accommodating portion 33, and a bottom portion 7 on the other longitudinal end. 3 and 4, a two-dot chain line G indicates a schematic boundary between the top portion 5 and the bag body portion 6, and a two-dot chain line H indicates a schematic boundary between the central portion 26 and the bottom portion 27. . Notch portions 7 a are formed at both corner portions of the bottom portion 7 . The opening 34 is arranged on the side of the bottom 7 .

As shown in FIGS. 2 and 3, the first packaging material 10 is composed of three divided sheets arranged in the length direction L, that is, a top sheet 11, a central sheet 12 and a bottom sheet 13, which are integrated into one sheet. It is made into a sheet. The top sheet 11 constitutes part of the bag body 6 and the top 5 of the packaging bag 1 . The center sheet 12 constitutes the bag main body 6 of the packaging bag 1 . The bottom sheet 13 constitutes part of the bag body 6 and the bottom 7 of the packaging bag 1 . Each of the top sheet 11 and the central sheet 12 has a trapezoidal shape that gradually widens from one end side to the other end side in the length direction L. As shown in FIG. The bottom sheet 13 has a hexagonal shape that once widens from one end side to the other end side in the length direction L and then narrows conversely. The bottom sheet 13 has a first packaging material-side notch 10 a corresponding to the notch 7 a of the packaging bag 1 . The bottom sheet 13 includes a folded portion 13b that is folded to close the opening 34 when the sandwich 100 contained therein is wrapped.

The top sheet 11, middle sheet 12 and bottom sheet 13 are all paper sheets made of flexible paper material. The central sheet 12 is made of a visible paper material that allows the sandwich 100 accommodated in the accommodation portion 33 to be visually recognized from the outside. The packaging bag 1 of the embodiment has a window portion 14 formed by the central sheet 12 .
Note that the paper material referred to in this specification includes unprocessed paper alone, processed single paper, and at least one side of such paper coated with a resin film or the like. Including things, etc.

As the paper material for the center sheet 12 forming the window 14, a translucent paper material such as glassine paper or cellophane paper is preferably used. Alternatively, a paper material having some degree of water resistance may be used, in which a film made of resin such as biaxially oriented polypropylene (OPP) is laminated on at least the inner surface facing the storage section 33 of such a paper material.

On the other hand, the paper material of the top sheet 11 and the bottom sheet 13 sandwiching the central sheet 12 may be the same paper material as the central sheet 12, but is made of a paper material with lower visibility than the paper material of the central sheet 12. It can be. That is, sandwich 100 may not be visible from the outside through top sheet 11 and bottom sheet 13 . This is because the sandwich 100 can be seen from the outside through the central sheet 12 of the window 14 . Examples of such paper materials include Western paper, Japanese paper, synthetic paper, kraft paper, and the like. The paper material constituting the top sheet 11 and the bottom sheet 13 is, like the central sheet 12, laminated with a resin film such as OPP (biaxially oriented polypropylene) on at least the inner surface facing the storage section 33, and has a certain degree of water resistance. It may be a paper material having properties. The top sheet 11 and bottom sheet 13 may be of the same type of paper stock or of different types of paper stock.

As shown in FIG. 5, the ends of the top sheet 11 and the bottom sheet 13 are overlapped and joined to the outside of the central sheet 12 . The joining in this case is by means of an adhesive compatible with each sheet 11 , 12 , 13 . Alternatively, in the case of a paper material laminated with a film as described above, the top sheet 11 and bottom sheet 13 can be joined to the center sheet 12 by heat sealing using the film. Since the paper materials are joined together, shrinkage at the joined portion is unlikely to occur.

As shown in FIGS. 2 and 4, the second packaging material 20 is composed of one sheet of resin film. The second packaging material 20 made of film may be transparent, translucent, or opaque. The second packaging material 20 has a top portion 25, a central portion 26 and a bottom portion 27 corresponding to the top portion 5, bag body portion 6 and bottom portion 7 of the packaging bag 1, respectively. The bottom portion 27 includes a folding portion 27b that is folded to close the opening 34 when the sandwich 100 contained therein is wrapped. The bottom portion 27 is formed with a second packaging material side notch portion 20a corresponding to the notch portion 7a of the packaging bag 1 .

The second packaging material 20 is composed of a sheet of transparent or translucent synthetic resin film having flexibility. Moreover, it is preferable that the film constituting the second packaging material 20 has heat-welding properties in order to facilitate heat-sealing. As such a synthetic resin film, a single-layer or multi-layer synthetic resin film is used. In the case of a single layer, for example, it is a synthetic resin film such as (PE), polypropylene (PP), polyethylene terephthalate (PET). In the case of multiple layers, for example, a synthetic resin film having a three-layer structure in which PVDC (polyvinylidene chloride), which serves as a barrier layer for blocking moisture, is sandwiched between polyethylene, or the like is preferably used.

An inverted U-shaped notch 21 is provided in the center of the width direction of the top 25 of the second packaging material 20 to provide an opening piece 22 that allows the second packaging material 20 to be partially turned up. ing. A band-shaped cut tape 23 extending in the longitudinal direction L from the opening piece 22 substantially across the central portion 26 is adhered to the inner surface of the second packaging material 20 . The cut tape 23 is a synthetic resin film. By pinching the opening piece 22 with fingers and tearing the cut tape 23 from the top portion 25 side toward the bottom portion 27 side, the second packaging material 20 can be divided into left and right. Thereby, the housed sandwich 100 can be taken out from the back side, which is the side of the second wrapping material 20 .

The sandwich 100 is packaged with the packaging bag 1 of the first embodiment as follows.
First, the opening 34 is opened as shown in FIG. 1 and the sandwich 100 is inserted into the receptacle 33 from one non-right-angled top 105 . At this time, the second packaging material 20 on the back side is arranged on the lower side, the first packaging material 10 on the front side is arranged on the upper side, and the slope 106 of the sandwich 100 corresponding to the oblique side of the right triangle is placed on the first side. The sandwich 100 is inserted into the packaging bag 1 so as to face the packaging material 10.例文帳に追加

Next, as shown in FIG. 6( a ), the sandwich 100 is stored in the packaging bag 1 when the top 105 of the insertion tip side of the sandwich 100 reaches the inside of the top 5 on the back side. Become. In this stored state, the packaging bag 1 is deformed into a right-angled triangular shape along the shape of the sandwich 100, and the opening 34 is opened in a rectangular shape. A surplus portion is generated on the side of the opening 34 of the sandwich 100 rather than the containing portion 33, and this surplus portion serves as a rectangular tube-shaped sealing portion 35 for sealing the packaged state. The sealing portion 35 includes a folded portion 13 b of the bottom sheet 13 of the first packaging material 10 and a folded portion 27 b of the bottom portion 27 of the second packaging material 20 .

Next, as shown in FIG. 6(b), the widthwise central portion 27c of the bottom portion 27 of the second packaging material 20 constituting the sealing portion 35 is exposed through the opening portion 34 of the rectangular shape of the sandwich 100. Next, as shown in FIG. folded on the side of the first packaging material 10 so as to come into contact with the surface of the Next, each of the side portions 35a on both sides where the folded portion 13b of the first packaging material 10 and the folded portion 27b of the second packaging material 20 that constitute the sealing portion 35 shown in FIG. , and are folded inward in order as indicated by arrows M, and as shown in FIG. Finally, the projecting portion 13c of the bottom sheet 13 of the first packaging material 10 constituting the folded portion 13b shown in FIG. 6(c) is folded forward as indicated by the arrow N in FIG. 6(d), It is overlaid on the previously folded sealing portion 35 and held in that state by the seal 40 . For the final sealing of the packaging bag 1 that maintains the packaging state, the sealing portion 35 may be joined by means of an adhesive, heat sealing, or the like instead of using the seal 40 .

As a result, as shown in FIG. 7, the sandwich 100 is packaged in the packaging bag 1 deformed into a shape substantially along the outer surface of the sandwich 100 . In this packaging state, the window portion 14 of the first packaging material 10 is arranged at a position facing the material 102 of the sandwich 100 . Therefore, the ingredients 102 of the sandwich 100 can be visually recognized through the window portion 14 . Although the first packaging material 10 is entirely made of paper, the central sheet 12 constituting the window 14 is made of a visible paper material such as glassine paper. Thereby, the type of the sandwich 100 can be easily determined visually through the window portion 14 .

Since the folded portion 27b of the bottom portion 27 of the second packaging material 20 constituting the sealing portion 35 is made of a flexible resin film, it can be easily folded flat, and as a result, the sealing portion 35 can be folded many times. However, the increase in thickness is suppressed, and it is difficult to be bulky.

The opening piece 22 provided on the second packaging material 20 on the back side is pinched with fingers and the cut tape 23 is torn from the top part 25 toward the bottom part 27 to separate the central part 26 of the second packaging material 20 into left and right. As a result, the packaging bag 1 is opened, and the contained sandwich 100 can be taken out from the side of the second packaging material 20 and eaten.

The packaging bag 1 according to the first embodiment is manufactured by a manufacturing line 50 shown in FIG. 8, for example. An example of the manufacturing method of the present invention can be implemented by the manufacturing line 50 .

By the production line 50 shown in FIG. 8, a first raw material 10S capable of forming a plurality of first packaging materials 10 is conveyed in the direction of arrow H, and a plurality of second packaging materials 20 can be formed. A second stock 20S is conveyed in the direction of arrow K. The first raw fabric 10S and the second raw fabric 20S are synchronously and intermittently transported. In the production line 50, a process A of attaching the cut tape 23 to the second raw material 20S, a process B of forming the opening piece 22 on the second raw material 20S, and a second A step C of superimposing the first raw material 10S on the raw material 20S, a step D of forming the packaging bag 1 so as to be continuously arranged in the conveying direction by forming the sealing portion 30, and the sealing portion 30 By dividing the side sealing portion 32 in the conveying direction, a step E of sequentially cutting a plurality of packaging bags 1 and a step F of forming the bottom notch portion 7a are performed. Step D of forming the seal portion 30 includes Step D1 of forming the top seal portion 31 and Step D2 of forming the side seal portion 32 .

In the manufacturing line 50, a plurality of packaging bags 1 are continuously manufactured such that the length direction L of the packaging bag 1 is perpendicular to the conveying direction and the lateral orientations are alternately opposite to each other. Therefore, the openings 34 are alternately arranged on both sides in the conveying direction in the packaging bags 1 adjacent in the conveying direction.

As shown in FIG. 9, the first material 10S is a central sheet material 12S wound in a roll and side sheet materials 15S on both sides of the central sheet material 12S. The side edge portions of the side sheet material 15S are overlapped and joined to both sides of the central sheet material 12S to continuously manufacture. The central sheet material 12S is the original material of the central sheet 12 of the first packaging material 10 . The side sheet raw fabric 15S is the raw fabric of the top sheet 11 and the bottom sheet 13 of the first packaging material 10 . Therefore, the top sheet 11 and the bottom sheet 13 of the first packaging material 10 are made of the same paper material.

In step A, cut tapes 23 are attached at regular intervals to the upper surface of the second raw fabric 20S that has been let out. The upper surface to which the cut tape 23 is adhered is the inner surface of the packaging bag 1 facing the accommodating portion 33 . The cut tape 23 is adhered to the second original sheet 20S by pressing the cut tape 23 against the second original sheet 20S using, for example, a heat seal bar (not shown).

In step B, a notch 21 is made by a cutter (not shown) in a portion adjacent to one end of the cut tape 23 to form an opening piece 22 . Since the packaging bags 1 are formed laterally and alternately in opposite directions to the conveying direction, the positions where the cut tape 23 is adhered and the opening pieces 22 are formed are shifted alternately in the width direction of the second raw fabric 20S. ing.

In process C, the first material 10S is superimposed on the second material 20S conveyed through processes A and B. As shown in FIG. In the process D, the heat seal bar 51 seals the first material 10S and the second material 20S to form the top seal portion 31. Subsequently, the heat seal bar 52 seals the second material 10S. A step D2 of forming the side seal portion 32 by sealing the first raw material 10S and the second raw material 20S is performed. As shown in FIG. 10 , a plurality of sideways trapezoidal packaging bags 1 are continuously arranged in the conveying direction while the openings 34 are alternately formed on both sides in the conveying direction by steps D1 and D2. is formed as In step D, the first raw fabric 10S and the second raw fabric 20S are sealed to each other so that the opening 34 remains on one side in the transport direction, and the sealed portion 30 is formed.

In step E, as also shown in FIG. 10, the side seal portion 32 is cut in the conveying direction by a cutter (not shown). As a result, a plurality of packaging bags 1 are sequentially cut and obtained. In step F, a notch portion 7a of the bottom portion 7 is formed by a cutter (not shown). As shown in FIG. 10, a trapezoidal packaging bag 1 is obtained by cutting a plurality of packaging bags 1 horizontally with respect to the conveying direction so that the horizontal states are alternately opposite to each other. Even so, the first raw sheet 10S and the second raw sheet 20S can be efficiently manufactured without causing waste.

The packaging bag 1 according to the first embodiment described above is attached to a sheet-like first packaging material 10 and the first packaging material 10, and accommodates the sandwich 100 between the first packaging material 10 and the first packaging material 10. and a sheet-like second packaging material 20 forming an accommodating portion 33 and an opening portion 34 opening the accommodating portion 33 to the outside. At least a part of the first packaging material 10 has a window part 14 made of a visible paper material through which the sandwich 100 housed in the housing part 33 can be visually recognized from the outside.

As a result, at least part of the first packaging material 10 is made of paper material, so that the amount of resin used can be reduced. Since the paper material has better printability than the resin film, the paper material part (the top sheet 11, the central sheet 12 and the bottom sheet 13) of the packaging bag 1 can be printed with a product name, pattern, logo, etc. Easy to print display. Further, according to the packaging bag 1 of the first embodiment, the sandwich 100 contained therein can be visually recognized from the outside through the window 14, and the type of the sandwich 100 can be easily determined visually.

In the packaging bag 1 according to the first embodiment, the first packaging material 10 is entirely made of paper material including the window part 14 , and the parts other than the window part 14 are more visible than the paper material of the window part 14 . It is preferably made of a paper material with a low

Since the first packaging material 10, which occupies approximately half of the packaging bag 1, is made of paper material, the amount of resin used can be greatly reduced, and the window portion 14 can be covered with a transparent resin film or the like. The sandwich 100 inside can be easily viewed through the window 14 without any configuration.

In the packaging bag 1 according to the first embodiment, the second packaging material 20 has a folded portion 27b that serves as a sealing portion 35 that closes the opening 34, and at least the folded portion 27b is made of a resin film. It is preferable that

As a result, the bottom portion 27 of the second packaging material 20 that constitutes the folded portion 27b can be easily folded into a flat shape, and even if the sealing portion 35 is folded many times, the increase in thickness is suppressed, making it less bulky. .

In the packaging bag 1 according to the first embodiment, the food stored in the storage portion 33 is the sandwich 100 in the shape of a right triangle, and the window portion 14 is arranged at a position facing the ingredients 102 of the sandwich 100 .

Thereby, the type of the sandwich 100 based on the ingredients 102 can be easily determined visually through the window portion 14 .

The manufacturing method of the packaging bag 1 according to the first embodiment includes a first raw material 10S capable of forming a plurality of first packaging materials 10 and a second raw material 10S capable of forming a plurality of second packaging materials 20. A step of superimposing the first original fabric 10S and the second original fabric 20S while feeding each of the original fabrics 20S and conveying them in a predetermined conveying direction; The raw fabric 20S is sealed with each other so that the opening 34 remains on one side in the conveying direction to form the sealing portion 30, thereby forming the packaging bags 1 so as to be continuously arranged in the conveying direction. and a step of sequentially cutting and obtaining a plurality of food packaging bags 1 by dividing the plurality of seal portions 30 in the conveying direction.

Thereby, the packaging bag 1 according to the first embodiment can be manufactured favorably.

In the method of manufacturing the packaging bag 1 according to the first embodiment, the packaging bag 1 has a substantially trapezoidal shape and an opening 34 at one end in its height direction (longitudinal direction L in FIG. 3). , and the openings 34 are preferably arranged alternately on both sides in the conveying direction in the packaging bags 1 adjacent in the conveying direction.

As a result, the substantially trapezoidal packaging bag 1 can be efficiently manufactured without wasting the first material 10S and the second material 20S.

(Second embodiment)
Next, a second embodiment will be described with reference to FIGS. 11 to 14. FIG.
The packaging bag 2 according to the second embodiment differs from the first embodiment in that both the first packaging material 10 and the second packaging material 20 are made of one sheet of paper material. . In the following description, components having functions common to those of the first embodiment are denoted by common reference numerals, descriptions thereof are omitted, and differences are mainly described.

11 is an exploded perspective view of the packaging bag 2 of the second embodiment, FIG. 12 is a plan view of the packaging bag 2 of the second embodiment viewed from the first packaging material 10 side (front side), and FIG. 13 is the second embodiment. FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG. 13. FIG. As shown in these figures, both the first packaging material 10 and the second packaging material 20 are composed of one sheet, and the sheet is composed of a paper material.

In the packaging bag 2 of the second embodiment, both the first packaging material 10 and the second packaging material 20 are made of a visible translucent paper material such as glassine paper or cellophane paper. As such a paper material, a paper material having a certain degree of water resistance obtained by laminating a resin film such as OPP (biaxially oriented polypropylene) on at least the inner surface facing the storage section 33 may be used. Since both the first wrapping material 10 and the second wrapping material 20 are made of visible paper material, the sandwich 100 of the first wrapping material 10 and the second wrapping material 20 can be viewed in a state where the sandwich 100 is wrapped. The portion facing the sandwich 100 can be a window 14 through which the sandwich 100 can be viewed from the outside.

In the packaging bag 2 of the second embodiment, one of the first packaging material 10 and the second packaging material 20 is made of a visible paper material such as glassine paper, and the other is made of a sandwich 100 containing the contents. Western paper, Japanese paper, synthetic paper, kraft paper, etc. that cannot be used may be used. In that case, if a visible paper material is applied to the first packaging material 10 on the front side, it is preferable in that the appearance is good and the ingredients 102 are easily visible.

The second packaging material 20 is provided with an opening piece 22 by providing a notch 21 . A cut tape 23 is attached to the inner surface of the second packaging material 20 so as to correspond to the opening piece 22 .

The packaging bag 2 is formed by stacking the first packaging material 10 and the second packaging material 20 on top of each other with their shapes aligned, and the sealing portions 30 on three sides, that is, the top sealing portion 31 and the side sealing portions 32, are attached to each other. Formed into a bag shape.

In the packaging bag 2 of the second embodiment, at least one of the first packaging material 10 and the second packaging material 20 is made of paper material like the first packaging material 10 of the first embodiment. It may be composed of a sheet in which a plurality of sheets are integrated.
Moreover, in the packaging bag 2 of the second embodiment, the cut tape 23 may also be made of paper material.

In the packaging bag 2 of the second embodiment, both the first packaging material 10 and the second packaging material 20 are made of paper material.
As a result, the resin film can be completely eliminated, or the amount used can be significantly reduced, and the amount of resin used can be greatly reduced.

The present invention is not limited to the above embodiments, and can be modified as appropriate.
For example, the first packaging material 10 of the first embodiment is a sheet of visible glassine paper or the like as in the second embodiment, instead of integrating a sheet of paper material divided into a plurality of pieces. sheet. Alternatively, the first packaging material 10 may not be entirely made of paper material, but may be partially made of paper material that serves as a window and the other part made of film. The film in that case need not be transparent or translucent.
In the first embodiment, the second packaging material 20 may be a combination of a paper material and a film, or only a paper material, instead of being composed of a sheet of resin film.

1, 2 Food Packaging Bag 10 First Packaging Material 10S First Original Fabric 14 Window Part 20 Second Packaging Material 20S Second Original Fabric 27b Folding Part 30 Sealing Part 33 Storage Part 34 Opening 100 Sandwich (Food )
102 Ingredients

Claims (7)

A sheet-like first packaging material, and a sheet-like second packaging material that is attached to the first packaging material and forms a storage portion that stores food between the first packaging material and the first packaging material; and an opening that opens the accommodating part to the outside,
Of the first packaging material and the second packaging material, at least a part of the first packaging material is made of a visible paper material that allows the food stored in the storage part to be visually recognized from the outside. A food packaging bag having a configured window. The first packaging material is entirely composed of a paper material including the window, and the portion other than the window is composed of a paper material that is less visible than the paper material of the window. Item 1. The food packaging bag according to item 1. 3. The food packaging bag according to claim 1, wherein said second packaging material has a folded portion that closes said opening, and at least said folded portion is made of a resin film. 3. The food packaging bag according to claim 1, wherein both said first packaging material and said second packaging material are made of paper material. The food accommodated in the accommodation portion is a substantially triangular sandwich,
The food packaging bag according to any one of claims 1 to 4, wherein the window is arranged at a position facing the ingredients of the sandwich. A method for manufacturing the food packaging bag according to any one of claims 1 to 5,
A first raw fabric capable of forming a plurality of first packaging materials and a second raw fabric capable of forming a plurality of said second packaging materials are fed out and conveyed in a predetermined conveying direction. , a step of overlapping the first raw fabric and the second raw fabric;
The first raw fabric and the second raw fabric that are superimposed are sealed with each other so that the opening remains on one side in the conveying direction to form a sealed portion. A step of forming food packaging bags so as to be continuously arranged in the conveying direction;
A method for manufacturing a food packaging bag, comprising a step of sequentially cutting a plurality of the food packaging bags by dividing the plurality of the sealing portions in the conveying direction. The food packaging bag has a substantially trapezoidal shape and has the opening at one end in the height direction, and the opening is formed in the food packaging bag adjacent to the conveying direction. 7. The method of manufacturing the food packaging bag according to claim 6, wherein the bags are arranged alternately on both sides in the conveying direction.

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