JP2013241189A - Paper bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper bag which includes an unsealing tape and which achieves facilitation of unsealing work.SOLUTION: A decorative paper 21 for covering a tubular bag body 2 configured by shutting at least one opening 3a of a tubular body 3 includes first and second areas 21a and 21b to which second peelable paste B1 and adhesive paste B2 are respectively attached, and a boundary part 21c formed between them. The unsealing tape 25 of the decorative paper 21 for unsealing the one opening 3a is configured to include the first area 21a and the boundary part 21c, and the decorative paper 21 has a first notch 33 provided in the boundary part 21c and faces an outer periphery of the decorative paper, and a second notch 41 provided in the second area 21b and having one end facing the boundary part 21c, the second notch 41 being arranged along one fold part 11 arranged on the outside out of a pair of second fold parts 9.

Description

  The present invention relates to a paper bag that can be opened easily, and more particularly, to a paper bag that includes an opening tape and that can be opened easily.

Conventionally, as shown in FIG. 12, a cylindrical bag body 2 in which at least one opening 3 a of the cylindrical body 3 at both ends is closed, and a makeup covering the closed opening of the cylindrical bag body 2. There is a paper bag 71 with paper 21.
The cylindrical body 3 forming the cylindrical bag body 2 includes at least a sheet of paper that is formed into a cylindrical shape by adhering both ends in the width direction, and the paper bag 71 is composed of a plurality of layers. The sheet-like material corresponding to each layer is formed into a cylindrical shape and is superposed on each other.
In addition, FIG. 12 is a principal part conceptual diagram which shows a mode that the conventional paper bag was seen from the bottom face side. Also, in FIG. 12 to FIG. 17 described later, the same parts are denoted by the same reference numerals.

FIG. 13 is an exploded conceptual view of the paper bag of FIG.
The cylindrical bag body 2 is folded at a portion facing the at least one opening 3a of the cylindrical body 3, and the folded portions (hereinafter referred to as "folded portions") 7 are folded over to each other and opposed to each other. One opening 3a is closed by interposing a first peeling paste (no symbol) between the two.
In addition, the front part 2a, the back surface, and both side edges are formed in the cylindrical bag body 2 by folding the folding part 7, and these are the front surface, the back surface, and both side edges of the paper bag 71, respectively.

  The folding part 7 includes a pair of first folding parts 8 that are respectively continuous with the respective side ends of the cylindrical bag body 2 and a pair of second folding parts 9 that are folded on the first folding part 8. Yes. The pair of second fold portions 9 includes one fold portion 10 and the other fold portion 11 that face each other, and the one fold portion 10 and the other fold portion 11 are the back surfaces of the cylindrical bag body 2, respectively. , Is continuous with the front surface 2a. Further, the other folding part 11 is arranged outside the one folding part 10.

In addition, the first peeling paste (not indicated) interposed between the other folding portion 11 and the one folding portion 10 is included in the first peeling paste interposed between the folding portions 7 facing each other. is there.
As shown in FIG. 13 and FIG. 14, the other folding part 11 includes a glued part H that is glued to the one folded part 10 by the first peeling glue.
The gluing portion H extends from the tip 11 a of the other fold 11 to a position where the other fold 11 contacts the tip 10 a of the one fold 10.
Note that the position at which the other folding part 11 contacts the tip 10a of the one folding part 10 is the other folding part with respect to a virtual center line X connecting the starting ends of the first folding parts 8 when the paper bag 1 is viewed from the bottom. 11 on the side where folding is performed.
FIG. 14 is a conceptual diagram showing a pasting portion of the paper bag of FIG. The gluing portion H is provided on the back surface of the decorative paper 21, but in FIG. 14, the gluing portion H is illustrated by hatching for easy understanding. FIG. 14 also shows a state where an opening tape 25 (described later) is pulled.

  Further, the outer surface of the cylindrical bag body 2 formed by the folding portion 7 closes one opening 3a, and the outer surface of the cylindrical bag body 2 and the decorative paper 21 are bonded to the adhesive paste B2 (FIG. 7 (a ))).

  The decorative paper 21 includes two adhesive paste regions 81b to which the adhesive paste B2 is attached, and a boundary portion 21c formed between the two adhesive paste regions 81b.

  Further, the adhesive glue region 81b is formed such that when one opening 3a of the cylindrical bag body 2 is covered with the decorative paper 21, as shown in FIG. They are arranged on both the side where the folding is performed and the side where the other folding part 11 is folded.

Further, the decorative paper 21 is provided with an opening tape 25 for opening one of the closed openings 3a.
This opening tape 25 consists only of the boundary part 21c to which the opening string 25a was attached. The opening string 25a is affixed over the entire length of the decorative paper 21.
In addition, although the opening tape 25 and each adhesive paste area | region 81b of the boundary part 21c are provided in the back surface of the decorative paper 21 which touches the folding part 7, in FIG.12, FIG.13, FIG.15, FIG.16 and FIG. In order to facilitate understanding, it is shown by hatching.

This decorative paper 21 is provided with two first cuts 33 whose one end faces the outer edge of the decorative paper 21 at the boundary portion 21c. The first cuts 33 are all disposed between the opening tape 25 and the adhesive paste region 81b. The decorative paper 21 is not provided with a cut except for the first cut 33.
In addition, each of the first cuts 33 and the boundary portion 21c is such that one of the folded portions 10 is folded with respect to a virtual center line X that connects the starting ends of the first folded portions 8 when the paper bag 1 is viewed from the bottom. Arranged on the side that is done.

  Further, when the opening 3a of the cylindrical bag body 2 closed by the decorative paper 21 is covered in this way, the bottom portion of the paper bag 71 is completed. When the filling material is filled from the other opening (mouth portion) of the cylindrical body 3 and the mouth portion is further closed, the filling material can be accommodated.

To open the paper bag 71 (FIG. 12), the opening tape 25 is first pulled along the two first cuts 33 as shown in FIG.
Then, along the two first cuts 33, the opening tape 25 is pulled away from the adhesive paste regions 81 b of the tubular bag body 2 and the decorative paper 21. Thereafter, the opening tape 25 is pulled away along the opening string 25a.
FIG. 15 is a conceptual diagram showing a state where the opening tape of the paper bag of FIG. 12 is pulled.

As shown in FIG. 15, when the opening tape 25 is pulled, the tip 11a of the other folding part 11 is exposed. Here, the width at which the other folded portion 11 is exposed is the same width as the width of the opening tape 25, and the opening tape 25 is composed only of the boundary portion 21c. Therefore, the width at which the other folded portion 11 is exposed is the same as the width of the boundary portion 21c.
Next, the exposed tip 11 a is grasped, the tip 11 a is used as a handle, and the other fold portion 11 is pulled away from the one fold portion 10 and the first fold portion 8.
Then, as shown in FIG. 16, the glue part H and the one fold part 10 of the other folding part 11 glued by the first peeling glue, and the other folding glued by the first peeling glue. The part 11 and the first folding part 8 can be separated from each other, whereby the folding of the other folding part 11 can be released.

  Also, in this way, the exposed tip 11a of the other fold 11 is gripped, the tip 11a is used as a handle, and the other fold 11 is separated from the one fold 10 and the first fold 8. When the folding of the other folding part 11 is released by this, the other folding part 11 is on the side where the other folding part 11 is folded with respect to the boundary part 21c, as shown in FIG. An adhesive paste region 81b is bonded, and one folded portion 10 is bonded to the adhesive paste region 81b. Therefore, when the folding of the other folding part 11 is released, the adhesive paste region 81 b is broken to separate the other folding part 11 from the one folding part 10. Note that FIG. 16 described above is a conceptual diagram showing a state in which folding of the other folding portion of the pair of second folding portions of the paper bag of FIG. 15 is released.

  In addition, the exposed tip 11a of the other fold 11 is grasped, the tip 11a is used as a handle, and the other fold 11 is pulled away from the one fold 10 and the first fold 8, and Thereby, when releasing the folding of the other folding part 11, the adhesive part 81b on the side where the other folding part 11 is folded is bonded to the boundary part 21c to the other folding part 11, The first folded portion 8 is bonded to the adhesive paste region 81b. Therefore, when releasing the folding of the other folding part 11, the adhesive glue region 81 b is broken to separate the other folding part 11 from the first folding part 8.

  Next, the front end 10a of one folding part 10 shown in FIG. 16 is grasped, and the one folding part 10 is pulled away from the first folding part 8 as shown in FIG. Then, the one folding part 10 can be separated from the first folding part 8, whereby the folding of the one folding part 10 can be released.

  In addition, when the front end 10a of one of the folding parts 10 is gripped in this way and pulled in a direction away from the first folding part 8, the folding of the one folding part 10 is thereby released. As shown in FIG. 16, an adhesive glue region 81b on the side where the other fold part 11 is folded is bonded to the boundary part 21c, and the adhesive glue area 81b is the first fold part 10. It is also adhered to the folding portion 8. Therefore, when the folding of one folding part 10 is released, the adhesive paste region 81 b is broken to separate the one folding part 10 from the first folding part 8.

  Further, when one fold portion 10 is released from the first fold portion 8 by grasping the tip 10a of one fold portion 10 and pulling the fold portion 10 away from the first fold portion 8, the one fold portion 10 is released. 10, an adhesive glue region 81b on the side where one of the folded portions 10 is folded is bonded to the boundary portion 21c, and the adhesive paste region 81b is also bonded to the first folded portion 8. ing. Therefore, when the folding of one folding part 10 is released, the adhesive paste region 81 b is broken to separate the one folding part 10 from the first folding part 8.

After releasing the folding of one folding part 10 in this way, when the folding of the first folding part 8 is released as shown by a two-dot chain line in FIG. 17, the one opening 3a of the paper bag 71 is closed. When released, in other words, the paper bag 71 can be opened.
FIG. 17 is a conceptual diagram showing a state where the folding of one of the pair of second folding parts of the paper bag of FIG. 16 is released.

  Conventionally, there is a paper bag that can be opened without providing the opening tape 25 of the decorative paper 21. In this paper bag, the four corners of the outer surface of the cylindrical bag body 2 formed by the folding portion 7 are completely covered with the decorative paper, and the decorative paper is connected to the outer surface of the cylindrical bag body 2 only with the release glue. (Patent Document 1).

JP 2009-107689 A

  In the conventional paper bag 71, since the opening tape 25 consists only of the boundary portion 21c to which the opening string 25a is attached, the opening tape 25 is drawn along the two first cuts 33, and thereby the opening tape 25 is The width at which the other folded portion 11 is exposed when pulled apart from each adhesive paste region 81b of the tubular bag 2 and the decorative paper 21 is the same as the width of the opening string 25a. Therefore, even if it is going to grab the front-end | tip 11a (FIG. 14) of the other folding part 11, it will be in the state of picking, and it will be difficult to grasp, and the other folding part 11 is made into one folding part with this front-end | tip 11a It is difficult to pull away from 10 or the first folding part 8. For this reason, it is complicated to release the folding of the other folding part 11, and thus the opening operation of the paper bag 71 including the opening tape 25 is complicated.

  In view of the circumstances described above, an object of the invention of the present application is to provide a paper bag that includes an opening tape and that is easy to open.

  The invention of the present application includes a cylindrical bag body in which at least one opening of the cylindrical body is closed, a decorative paper covering the closed one opening of the cylindrical bag body, and a second release glue. Folded portions that are made of adhesive glue, have glue portions that connect the tubular bag and the decorative paper, and block one opening of the tubular bag, respectively, are continuous with each side end of the tubular bag. A paper bag having a pair of first folds and a pair of second folds continuous on the front and back surfaces of the cylindrical bag body, the decorative paper being a first to which a second release glue is attached An opening tape for decorative paper comprising an area, a second area to which adhesive glue is attached, and a boundary formed between the first area and the second area, and opening one of the openings, The decorative paper is provided at the boundary and has one first notch that faces the outer edge of the decorative paper, and a second area. And a second notch disposed along the other fold of the pair of second folds disposed on the outside of the pair of second folds. It is characterized by that.

  The paper bag of the invention of the present application includes a cylindrical bag body in which at least one opening of the cylindrical body is closed, a decorative paper covering the closed one opening of the cylindrical bag body, and a second peeling The fold part which consists of glue and adhesive glue, has a glue part which connects the cylindrical bag and the decorative paper, and closes one opening of the cylindrical bag, respectively, on each side end of the cylindrical bag A paper bag having a pair of continuous first folds and a pair of second folds continuous on the front and back surfaces of the cylindrical bag body, the decorative paper being attached to the second release glue An opening tape for decorative paper comprising one region, a second region to which adhesive glue is attached, and a boundary formed between the first region and the second region, and opening one of the openings, The decorative paper comprises a first region and a boundary portion, and the decorative paper is provided at the boundary portion, and one first notch with one end facing the outer edge of the decorative paper; A second notch disposed along the other fold portion disposed on the outside of the pair of second fold portions. Therefore, it is easier to open a paper bag provided with an opening tape than in the past.

FIG. 1 is a diagram showing a paper bag according to an embodiment of the present invention, and is a conceptual perspective view showing a state where a paper bag in which a filling material is stored and whose mouth is closed is viewed from the bottom side. 2A is a conceptual front view of a cylindrical body constituting the paper bag of FIG. 1, and FIG. 2B is a conceptual cross-sectional view taken along line AA of FIG. FIG. 3 is an exploded conceptual view of the main part of the paper bag of FIG. 1, and particularly shows a state seen from the bottom side. FIG. 4A is a conceptual diagram showing a state in which the first folded portion of the cylindrical bag body of FIG. 3 is folded, and FIG. 4B is a diagram of the cylindrical bag body of FIG. It is a conceptual diagram which shows a mode that one folding part of a pair of 2nd folding parts is folded. FIG. 5 is a main part conceptual diagram showing a state in which the paper bag of FIG. 1 is viewed from the bottom side. FIG. 6 is a conceptual diagram showing a state where the opening tape of the paper bag of FIG. 5 is pulled. 7A is a conceptual cross-sectional view taken along the line DD in FIG. 5, FIG. 7B is a conceptual cross-sectional view taken along the line EE in FIG. 6, and FIG. 7C is a paper bag of FIG. It is a conceptual sectional view showing signs that the other folding part which constitutes a pair of 2nd folding parts is canceled. FIG. 8 is a conceptual diagram showing a state in which folding of the other folding part of the pair of second folding parts of the paper bag of FIG. 5 is released. FIG. 9 is a conceptual diagram showing a state in which the folding of one of the pair of second folding parts of the paper bag of FIG. 8 is released. FIG. 10 is a conceptual diagram showing the state of the non-glue part and the glue part of the paper bag of FIG. FIG. 11 is a table showing the results of a bag drop test for measuring the strength of the paper bag of FIG. 1 in comparison with that of a conventional paper bag. FIG. 12 is a main part conceptual diagram showing a conventional paper bag as seen from the bottom side. FIG. 13 is an exploded conceptual view of the paper bag of FIG. FIG. 14 is a conceptual diagram showing a pasting portion of the paper bag of FIG. FIG. 15 is a conceptual diagram showing a state where the opening tape of the paper bag of FIG. 12 is pulled. FIG. 16 is a conceptual diagram showing a state in which the other folding part of the pair of second folding parts of the paper bag of FIG. 15 is released. FIG. 17 is a conceptual diagram showing a state in which folding of one of the pair of second folding parts of the paper bag of FIG. 16 is released.

  The paper bag of the present invention will be described in detail below based on the paper bag of the example.

FIG. 1 is a diagram showing a paper bag according to an embodiment of the present invention, and is a conceptual perspective view showing a state where a paper bag in which a filling material is stored and whose mouth is closed is viewed from the bottom side. 1 to FIG. 10 described later, the same parts as those in FIGS. 12 to 17 are denoted by the same reference numerals.
As shown in FIG. 1, the paper bag 1 according to the embodiment of the present invention includes a cylindrical bag body 2 in which at least one opening 3 a of the cylindrical body 3 having both end openings is closed, and the cylindrical bag body 2. A decorative paper 21 is provided to cover one of the closed openings 3a.

2A is a conceptual front view of a cylindrical body constituting the paper bag of FIG. 1, and FIG. 2B is a conceptual cross-sectional view taken along line AA of FIG.
As shown in FIG. 2A and FIG. 2B, the cylindrical body 3 forming the cylindrical bag body 2 covers the outer periphery of the cylindrical heat seal layer 4 and the heat seal layer 4. A cylindrical paper first layer 5 and a cylindrical paper second layer 6 are provided while covering the outer periphery of the first paper layer 5. The heat seal layer 4 is disposed as the innermost layer of the cylindrical body 3. The outer peripheral surface of the second paper layer 6 forms the surface of the cylindrical body 3.

Moreover, the heat seal layer 4 is formed of a material to be heat sealed (heat fusion), more specifically, a non-combustible material or a material suitable for incineration, or a material including the same. For example, the heat seal layer 4 is made of polyethylene.
Moreover, as for the heat seal layer 4, the one opening 3a side of the cylindrical body 3 is obstruct | occluded by the heat seal previously. The closed opening is the bottom of the inner bag (described later) of the paper bag 1.
The heat seal layer 4 is glued to the first layer 5 of paper with a release glue 61 as shown in FIGS. 2 (a) and 2 (b).

FIG. 3 is an exploded conceptual view of the main part of the paper bag of FIG. 1, and particularly shows a state seen from the bottom side.
As shown in FIG. 3, in the paper bag 1 of this embodiment, the cylindrical bag body 2 is folded at a portion facing the one opening 3a of the cylindrical body 3, and this folded portion (hereinafter referred to as “folding portion”). And the first opening 3a is closed by interposing the first peeling paste between the folds 7 facing each other.

  The folding portion 7 has a pair of first folding portions 8 that are continuous with each side end of the cylindrical bag body 2, and a pair of second folding portions 9 that are folded on the first folding portion 8. . The pair of second fold portions 9 includes one fold portion 10 and the other fold portion 11 that face each other. The one folded portion 10 and the other folded portion 11 are respectively continuous with the back surface and the front surface 2a of the tubular bag body 2 respectively.

In order to form the cylindrical bag body 2 from the cylindrical body 3, first, as shown in FIG. 4 (a), the first folded portion 8 continuous with one side end of the cylindrical body 3 and the other side end. Each of the continuous first folding portions 8 is folded toward the inner side of one opening 3a, and then one of the pair of second folding portions 9 of the cylindrical body 3 as shown in FIG. Is folded toward the inside of one opening 3a. Then, the one folding part 10 is folded on the first folding part 8.
Next, as shown in FIG. 3, the other fold 11 of the pair of second folds 9 of the cylindrical body 3 is folded toward the inside of the one opening 3 a. Then, the other fold portion 11 is folded over the first fold portion 8 or one fold portion 10, and at this time, the other fold portion 11 is disposed outside the one fold portion 10.
4A is a conceptual diagram showing a state in which the first folding portion is folded as a procedure for forming the cylindrical bag body of FIG. 3, and FIG. It is a conceptual diagram which shows a mode that one folding part of a pair of 2nd folding parts of the cylindrical bag body of Fig.4 (a) is folded as a procedure which forms this cylindrical bag body.

As shown in FIG. 4B, when one fold portion 10 of the pair of second fold portions 9 is folded, the one fold portion 10 and the first fold portion 8 face each other. As shown in FIG. 3, when the other folding part 11 is folded, the other folding part 11 and the first folding part 8 face each other, and the other folding part 11 and one folding part 10 are Facing each other.
As described above, the first peeling paste is interposed between the folds 7 facing each other.
Therefore, as shown in FIG. 3, a cylindrical bag body 2 is formed in which one opening 3 a of the cylindrical body 3 is closed. The first release paste is a paste having a connection strength that can be separated by manually separating two members connected by the first release paste.

  The heat seal layer 4 is formed by folding the first paper layer 5 and the second paper layer 6 together when the first fold 8 is folded. 3 is folded together with a first paper layer 5 located on the back side of the paper 3 and a second paper layer 6 located on the back side of the cylindrical body 3. When one of the pair of second folding portions 9 is folded, the first paper layer 5, the second paper layer 6 and the heat seal layer 4 are folded together. When the other fold part 11 of the pair of second fold parts 9 is folded, the first paper layer 5 and the second paper layer 6 are folded together.

  As shown in FIG. 3, the other folding part 11 of the pair of second folding parts 9 of the cylindrical bag body 2 includes a glued part H that is glued to the one folded part 10. This gluing is performed by the first peeling glue (no symbol). Further, the gluing portion H is arranged only on the side where the other folding portion 11 is folded with respect to the virtual center line X connecting the starting ends of the first folding portions 8 when the paper bag 1 is viewed from the bottom. ing.

In addition, the other folding part 11 is provided with a non-glue part R that includes the tip 11a of the other folding part 11 and is not glued to the one folding part 10. This non-glue portion R is not glued by the first peeling glue. Note that the non-glue portion R is not bonded by adhesive glue. Further, the non-glue portion R is not glued to the first folding portion 8 as well.
The non-glue portion R extends from the tip 11 a of the other fold 11 to a position where the other fold 11 does not reach a position where it contacts the tip 10 a of the one fold 10.

Further, the paper bag 1 includes a glue portion B (FIG. 7A) that connects the outer surface formed by the folding portion 7 of the cylindrical bag body 2 and the decorative paper 21. This glue part consists of the second peeling glue B1 and the adhesive glue B2.
The second release paste B1 is a paste having a connection strength that can be separated by manually separating two members connected by the second release paste B1. Further, the adhesive paste B2 is a paste having a connection strength that cannot be separated by manually separating two members connected by the adhesive paste B2.
The second release paste B1, the adhesive paste B2, and the first release paste described above are all existing pastes.

As shown in FIG. 3, the decorative paper 21 includes a first region 21a to which the second release paste B1 is attached, a second region 21b to which the adhesive paste B2 is attached, the first region 21a and the second region 21a. And a boundary portion 21c formed between the region 21b and the region 21b. The first region 21a is disposed on the side where one of the folded portions 10 is folded with respect to the second region 21b.
In addition, although the 1st area | region 21a and the 2nd area | region 21b are provided in the back surface of the decorative paper 21 which touches the folding part 7, in FIG. 3, FIG.5, FIG.6, FIG.8 and FIG.9 mentioned later, In order to facilitate understanding, it is shown by hatching.

FIG. 5 is a main part conceptual diagram showing a state in which the paper bag of FIG. 1 is viewed from the bottom side.
As shown in FIG. 5, the cylindrical bag 2 is formed by covering one opening 3 a (FIG. 3) of the cylindrical bag 2 with the decorative paper 21 and forming the folded portion 7 of the cylindrical bag 2. When the outer surface of the paper and the decorative paper 21 are connected (glued) by the glue part B, the bottom part of the paper bag 1 is completed.
When the bottom of the paper bag 1 is completed, the first region 21a of the decorative paper 21 is arranged on the side where the one folded portion 10 is folded with respect to the second region 21b.

Further, the decorative paper 21 is provided with an opening tape 25 for opening one of the closed openings 3a.
The opening tape 25 includes a first region 21a and a boundary portion 21c. A conventional opening string 25 a is attached to the boundary portion 21 c over the entire length of the decorative paper 21. The opening string 25a is a synthetic resin tape, and is usually called a cut tape.

In addition, the decorative paper 21 has a single first cut 33 provided in the boundary portion 21c. One end of the first cut 33 faces the outer edge of the decorative paper 21. Moreover, this 1st cut 33 consists only of one cut arrange | positioned between the opening tape 25 and the 2nd area | region 21b.
The first cut 33 is arranged on the side where the other folding part 11 is folded with respect to the virtual center line X connecting the starting ends of the first folding parts 8 when the paper bag 1 is viewed from the bottom. . Further, the boundary portion 21c provided with the first cut 33 is such that its center line is on a virtual center line X connecting the first ends of the first folding portions 8 when the paper bag 1 is viewed from the bottom surface. Be placed.

  The decorative paper 21 has a second cut 41 provided in the second region 21b and having one end facing the boundary portion 21c. The second notch 41 is disposed along the other fold portion 11 disposed on the outer side of the pair of second fold portions 9. The second cut 41 is a cut that separates the other folded portion 11 from the first folded portion 8.

  The first cut 33 and the second cut 41 are formed before the one opening 3 a of the cylindrical bag body 2 is covered with the decorative paper 21.

  Moreover, when the bottom part of the paper bag 1 is completed, the filling material can be filled from the mouth part which is the other opening of the cylindrical body 3. The heat seal layer 4 serves as an inner bag for containing the filler, and the first paper layer 5 and the second paper layer 6 serve as an outer bag covering the inner bag. Furthermore, after the heat seal layer 4 facing the mouth is heat sealed (heat fusion) and the inner bag is sealed, the first layer 5 of paper and the second layer 6 of paper facing the mouth are folded, When the mouth portion is covered with the sealing paper 62 (FIG. 1) attached to the outer surface of the cylindrical bag body 2, the outer bag is sealed, thereby closing (sealing) the mouth portion.

  Next, a procedure for opening the paper bag 1 will be described.

In order to open the paper bag 1, first, the opening tape 25 shown in FIG. 5 is drawn along one first cut 33. Then, as shown in FIG. 6, the opening tape 25 is pulled away from the cylindrical bag body 2 and the second region 21 b of the decorative paper 21 along the one first cut 33. Thereafter, the opening tape 25 is pulled away along the opening string 25a.
FIG. 6 is a conceptual diagram showing a state where the opening tape 25 of the paper bag 1 of FIG. 5 is pulled.

FIG. 7A is a DD conceptual cross-sectional view of FIG. 5, and FIG. 7B is a EE conceptual cross-sectional view of FIG.
When the opening tape 25 shown in FIG. 7A is pulled, at least the leading end 11a of the other folded portion 11 is exposed as shown in FIGS. 6 and 7B. At this time, since the other fold part 11 and the one fold part 10 are glued by the first peeling glue (see glued part H), as shown in FIG. Grasp 11a and pull the other folding part 11 away from one folding part 10 and first folding part 8 with the tip 11a as a handle.
Then, as shown in FIG. 8, the other folding part 11 was able to be separated from the one folding part 10 and the first folding part 8, and the folding of the other folding part 11 was thereby released.
FIG. 7C is a conceptual cross-sectional view showing a state in which the folding of the other folding part constituting the pair of second folding parts of the paper bag of FIG. 7B is released. FIG. 8 is a conceptual diagram showing a state where the folding of the other folding part of the pair of second folding parts of the paper bag of FIG. 5 is released.

The opened opening tape 25 includes a first region 21 a and a boundary portion 21 c that are separated from the tubular bag 2 and the second region 21 b of the decorative paper 21. One first cut 33 is provided at the boundary portion 21 c of the decorative paper 21, and one end of the first cut 33 faces the outer edge of the decorative paper 21. Accordingly, when the opening tape 25 is pulled along the one first cut 33, and the opening tape 25 is pulled away from the tubular bag 2 and the second region 21b of the decorative paper 21, the other tape The width at which the folded portion 11 is exposed is wider than that of the conventional paper bag 71 that is the same width as the width of the opening string 25a of the boundary portion 21c. Therefore, in this paper bag 1, it is easier to grip the exposed tip 11a of the other folded portion 11 than the conventional paper bag 71, and the tip 11a can be reliably gripped without being in a picked state. It is easier and more reliable than the conventional paper bag 71 to pull the other folding part 11 away from the one folding part 10 and the first folding part 8 with the tip 11a as a handle. It was.
Therefore, the paper bag 1 can easily separate the other fold portion 11 from the one fold portion 10 and the first fold portion 8 as compared with the conventional paper bag 71, and thereby the conventional paper bag 71. As compared with the case, the folding of the other folding part 11 could be easily released.

Further, as shown in FIG. 8, after releasing the folding of the other folding part 11, the front end 10 a of the one folding part 10 is grasped and the one folding part 10 is pulled away from the first folding part 8. Then, as shown in FIG. 9, one folding part 10 can be separated from the first folding part 8, and then the first folding part 8 is folded as shown by a two-dot chain line in FIG. When released, one closed opening 3a of the paper bag 1 can be released, in other words, the paper bag 1 (the bottom of the paper bag 1 in this embodiment) can be opened.
Such opening operation of the paper bag 1 is performed when taking out the filling. When the cylindrical body 3 of the paper bag 1 is composed of a plurality of layers as in this embodiment, the outer bag of the paper bag 1 is opened when one of the closed openings 3a is released, so that it is accommodated in the inner bag. The filler may be taken out from the outer bag together with the inner bag, or the inner bag may be opened by opening the inner bag and only the filler may be taken out from the inner bag and the outer bag. Further, when the cylindrical body 3 of the paper bag 1 is composed of one paper layer, it is possible to immediately take out the filling by releasing one of the closed openings 3a.
FIG. 9 is a conceptual diagram showing a state in which the folding of one of the pair of second folding parts of the paper bag of FIG. 8 is released.

  As described above, in the paper bag of the present invention, the cylindrical bag body 2 in which at least one opening 3a of the cylindrical body 3 is closed, and the one opening 3a of the cylindrical bag body 2 that is closed. A decorative paper 21 covering the paper, a second peeling paste B1 and an adhesive paste B2, and a glue portion B connecting the tubular bag body 2 and the decorative paper 21. One opening 3a of the tubular bag body 2 is provided. A pair of first folds 8 that are continuous with each side end of the cylindrical bag body 2, and a pair of second folds 7 that are respectively continuous with the front surface 2 a and the back surface of the cylindrical bag body 2. The decorative paper 21 includes a first region 21a to which the second release paste B1 is attached, a second region 21b to which the adhesive paste B2 is attached, A decorative paper having a boundary portion 21c formed between the region 21a and the second region 21b and opening one of the openings 3a. 1 of tear tape 25 comprises a first region 21a and the boundary portion 21c which is pulled away from the second region 21b of the tubular bag body 2 and the decorative sheet 21. The decorative paper 21 has one first cut 33 provided at the boundary 21 c and having one end facing the outer edge of the decorative paper 21. Therefore, in this paper bag 1, as described above, the opening tape 25 is drawn along this one first cut 33, and thereby the opening tape 25 is a second region of the tubular bag body 2 and the decorative paper 21. Since the exposed width at which the other folding part 11 is exposed when pulled away from 21b is wider than that of the conventional paper bag 71, the folding of the other folding part 11 can be easily released compared to the conventional paper bag 71. It was. Therefore, in the paper bag of this invention, compared with the conventional paper bag 71, the opening operation of the paper bag provided with the opening tape 25 (the opening operation of the bottom in the paper bag 1 of this embodiment) is facilitated. In other words, in the paper bag 1 of the present invention, it was possible to improve the opening of the paper bag provided with the opening tape 25 as compared with the conventional case.

In the paper bag 1 of the above-described embodiment, as shown in FIG. 3, FIG. 6, FIG. 10, or the like, the other folding portion 11 includes the tip 11 a and is not glued to the one folding portion 10. And the opening tape 25 is pulled along one first notch 33, whereby the opening tape 25 is separated from the tubular bag 2 and the second region 21b of the decorative paper 21. In this case, the non-glue portion R is exposed.
However, the paper bag of the present invention is not limited to that of the first embodiment, and may be a paper bag in which the non-glue portion R is not provided in the other folding portion 11.
Note that FIG. 10 described above is a conceptual diagram showing the state of the non-glue part and the glue part of the paper bag of FIG. The non-gluing portion R and the gluing portion H are provided on the back surface of the decorative paper 21, but in FIG. 10, they are illustrated with diagonal lines for easy understanding.

Moreover, the paper bag of this invention is provided with the non-glue part R which includes the front-end | tip 11a in the other fold part 11, and is not glued to one fold part 10, like the paper bag 1 of the Example mentioned above, and an opening tape 25 is pulled along one first notch 33, whereby the unsealing portion R is exposed when the opening tape 25 is pulled away from the tubular bag body 2 and the second region 21 b of the decorative paper 21. In the case of the paper bag, the tip 11a of the other folded portion 11 to be gripped is not glued to one folded portion 10 as shown in FIGS. Compared to a paper bag not provided with R (including the conventional paper bag 71 (FIG. 14)), it is easier to grip the tip 11a of the other fold 11 and the other fold can be folded using the tip 11a as a handle. The part 11 is connected to the one folded part 10 and the first folded part. Also pulling in a direction away to 8, in comparison with the paper bag non glued portion R is not provided (including conventional paper bag 71.), It was facilitated.
Therefore, in the paper bag 1, compared to the paper bag (including the conventional paper bag 71) in which the non-glue portion R is not provided, the other folding portion 11 is replaced with the one folding portion 10 and the first folding portion 8. Therefore, the folding of the other folding part 11 can be easily released as compared with the paper bag (including the conventional paper bag 71) in which the non-glue part R is not provided. Therefore, in the paper bag 1, the opening operation of the paper bag 1 provided with the opening tape 25 can be made easier compared to the paper bag (including the conventional paper bag 71) in which the non-glue portion R is not provided. .
Further, the non-glue portion R of the paper bag 1 is similar to the non-glue portion R of the paper bag 1 of the above-described embodiment, and the other fold portion 11 is connected to the one fold portion 10 from the tip 11a of the other fold portion 11. When extending to a position that does not reach the position in contact with the tip 10a, as shown in FIGS. 6 and 7C, the non-glue portion R of the other folding portion 11 separated from the opening tape 25; Since a space S is formed between one of the folded portions 10, by inserting a finger into this space S, the distal end 11a of the other folded portion 11 is not gripped, and the distal end 11a is more easily grasped. This makes it easier to pull the other folding part 11 away from the one folding part 10 and the first folding part 8 with the tip 11a as a handle. Therefore, in this paper bag 1, it is easier to separate the other folding part 11 from the one folding part 10 and the first folding part 8, and thereby the folding of the other folding part 11 is more easily released. did it. Therefore, in this paper bag 1, the opening operation of the paper bag provided with the opening tape 25 can be further facilitated.
Further, in the paper bag of the present invention, the opening tape 25 is drawn along one first cut 33 as in the paper bag 1 (FIG. 6) of the above-described embodiment, whereby the opening tape 25 is formed into a cylindrical bag body. 2 and the second region 21b of the decorative paper 21, when the non-glue portion R is a paper bag exposed, the position of the boundary portion 21c of the opening tape 25 is the boundary portion of the conventional paper bag 71. 21c (FIG. 14) is arranged on the side where the other folding part 11 is folded when the paper bag 1 is viewed from the bottom, and the position of the first notch 33 (FIG. 6) is also the same as that of the conventional paper bag 71. From the first cuts 33 (FIG. 14), the paper bag 1 is disposed on the side where the other folding part 11 is folded when viewed from the bottom. Therefore, the paper bag 1 can secure the width of the opening tape 25 larger than that of the conventional paper bag 71 as compared with the conventional paper bag 71, and thereby the opening operation of the paper bag including the opening tape 25 can be performed. It was easier than 71.

Further, in the paper bag 1 of this embodiment, the exposed tip 11a of the other folding part 11 is grasped, and this tip 11a is used as a handle, and the other folding part 11 is used as one folding part 10 and the first folding part. When the second folding portion 11 is released from the folding direction, the second region 21 b of the decorative paper 21 is bonded to the other folding portion 11. However, in the paper bag 1, the second region 21 b is not bonded to the one folded portion 10. Therefore, when releasing the folding of the other folding part 11, the second area 21b of the decorative paper 21 is made like the adhesive glue area 81b on the side where the other folding part 11 of the conventional paper bag 71 is folded. There is no need to break. In other words, the second region 21b does not become a resistance when the other fold part 11 is separated from the one fold part 10 and the fold of the other fold part 11 is released.
Therefore, in the paper bag 1 of this embodiment, it is easier to separate the other fold part 11 from the one fold part 10 as compared with the conventional paper bag 71, thereby easily folding the other fold part 11. I was able to cancel it. Therefore, the paper bag 1 can facilitate the opening operation as compared with the conventional paper bag 71.

Further, in this paper bag 1, the exposed tip 11 a of the other folding part 11 is grasped, the tip 11 a is used as a handle, and the other folding part 11 is made to the one folding part 10 and the first folding part 8. When the second folding part 11 is released by pulling in the separating direction, and the second folding part 11 is released, the second folding area 11 is bonded to the second area 21b, and the second folding area 11b has a first folding section. 8 is adhered.
However, in the paper bag of the present invention, the decorative paper 21 has a second cut 41 provided in the second region 21b and one end facing the boundary portion 21c. The second folding part 9 is arranged along the other folding part 11 arranged outside. Therefore, when the other folding part 11 is pulled away from the one folding part 10 and the first folding part 8, the other folding part 11 can be folded from the second cut 41 with a smaller force than the conventional paper bag 71. The part 11 can be naturally broken and separated from the first folding part 8, and the separation work is performed on the side where the other folding part 11 is folded as in the conventional paper bag 71. Compared with the paper bag which breaks 81b, it was possible to carry out easily.
Therefore, in the paper bag of the present invention, the folding of the other folding portion 11 can be easily released as compared with the conventional paper bag 71, and thereby the opening operation can be facilitated as compared with the conventional paper bag 71.
Note that the second notch 41 provides as much resistance as possible when separating the other folding part 11 from the first folding part 8 and releasing the folding of the other folding part 11, and thus the resistance of the entire opening operation. Acts as a reduction.
Further, as described above, in the paper bag of the present invention, since the opening operation is facilitated because of the second cut 41, the opening operation can be performed in a short time. Further, in the conventional paper bag 71 without the second notch 41, the adhesive paste region 81b on the side where the other folding part 11 is folded could not be cut cleanly. Since the second cut 41 was provided, the second region 21b could be cut cleanly.

Further, in the paper bag 1 of this embodiment, the second region 21 b of the decorative paper 21 is not bonded to the one folded portion 10. Therefore, when the front end 10a of one of the folding parts 10 is grasped and pulled in a direction away from the first folding part 8, the conventional paper bag 71 is released when the folding of the one folding part 10 is released. There is no need to break the second region 21b of the decorative paper 21 like the adhesive glue region 81b on the side where the other folding part 11 is folded. In other words, the second region 21b is not a resistance when the one folded portion 10 is separated from the first folded portion 8 and the folding of the one folded portion 10 is released, and thus the resistance of the entire opening operation is not achieved. That's what it means.
Therefore, in the paper bag 1 of this embodiment, it is easy to separate the one folded portion 10 from the first folded portion 8 as compared with the conventional paper bag 71, and thereby, compared with the conventional paper bag 71. The folding of the folding part 10 was easily released. Therefore, in the paper bag 1 of this embodiment, the opening operation can be facilitated as compared with the conventional paper bag 71.

Moreover, in this paper bag 1, when the front end 10a of one folding part 10 is grasped and pulled in a direction away from the first folding part 8, the folding of one folding part 10 is thereby released. The first region 21a is no longer attached to the one folded portion 10. This is because the opening tape 25 having the first region 21 a and the boundary portion 21 c has already been pulled, and the opening tape 25 has been separated from the second region 21 b of the one folded portion 10.
Therefore, when the one folded portion 10 is pulled away from the first folded portion 8 and thereby the folding of the one folded portion 10 is released, the folded portion 10 of the conventional paper bag 71 is folded. It is impossible to break the first region 21a of the decorative paper 21 like the adhesive paste region 81b on the side that is on the side. This means that the first region 21a does not serve as a resistance when the one folded portion 10 is separated from the first folded portion 8 and the folding of the one folded portion 10 is released, and as a result, the resistance of the entire opening operation is not achieved. That's what it means.
Therefore, in this paper bag 1, it is easier to separate one fold portion 10 from the first fold portion 8 than in the conventional paper bag 71, and as a result, in comparison with the conventional paper bag 71, Ten folds were easily released. Therefore, in the paper bag of the present invention, the opening operation of the paper bag 1 can be facilitated as compared with the conventional paper bag 71.

  In the paper bag 1 of this embodiment, the other fold part 11 of the cylindrical bag body 2 includes a tip 11a of the other fold part 11 and a non-glue part R that cannot be glued to the one fold part 10 is provided. Thus, the opening operation of the paper bag provided with the opening tape 25 is facilitated, and the other folding portion 11 includes a gluing portion H that is glued to the one folding portion 10, and the gluing portion H is attached to the paper bag 1. Since it is arranged only on the side where the other folding part 11 is folded with respect to the virtual center line X connecting the starting ends of the first folding parts 8 when viewed from the bottom, it is conventional as in the test results described later. Thus, a paper bag having the same strength as the paper bag 71 was obtained.

The paper bag of the present invention is easy to open the paper bag provided with the opening tape 25. In other words, the paper bag provided with the opening tape 25 is improved in the opening property, and according to the following test results. It was found that the bag had the same strength as the conventional paper bag 71.
FIG. 11 is a table showing the results of a bag drop test for measuring the strength of the paper bag of FIG. 1 in comparison with that of a conventional paper bag.
In FIG. 11, the results of the drop test of the conventional paper bag 71 as a comparative example and the paper bag 1 of the above-described embodiment according to the present invention are shown side by side. The results of performing the drop experiment and the side drop experiment twice are sequentially shown.

Test Method Regarding the paper bag 1 of the embodiment of the present invention and the conventional paper bag 71 as a comparative example, the mouth 3 is formed after the bottom of the paper bag 1 is formed by further covering the one opening 3a covered with the decorative paper 21. Then, the filling of the paper bag 1 was prepared by heat sealing the heat seal layer 4 facing the mouth and sealing with the sealing paper 62 at the mouth.
And the horizontal drop test, the vertical drop test, and the side drop test were done.
1) Horizontal drop test
The horizontal drop test was performed twice.
As a horizontal drop test, each paper bag was dropped 5 times from the height of 1.2 m, with the front surface 2a of the paper bag facing up, and then dropped 5 times with the back of the paper bag facing up, This caused a total of 10 drops.
2) Vertical drop test The vertical drop test was performed twice.
As a vertical drop test, each paper bag was dropped from a position at a height of 0.8 m with its bottom part facing down.
3) Side drop test The vertical drop test was performed twice.
As a vertical drop test, each paper bag was dropped five times from one side of the side so that each paper bag would fall from one side of the side, and then the other side. The other side surface was dropped 5 times so that it would fall off, and a total of 10 drops were performed.
In this 1) horizontal drop test, 2) vertical drop test, and 3) side drop test, after each drop, the leakage of the filler in each paper bag 1 or the occurrence of broken bags was visually confirmed.
In addition, as a result of a total of 10 drops in each of 1) horizontal drop test, 2) vertical drop test, and 3) side drop test, the decorative paper (ripper) 21 constituting the bottom of the paper bag was torn. When there was no leakage of the filling material, the paper bag was recorded as “accepted 10 times” as an acceptable product.
In addition, if there is a tear of the decorative paper (strength paper) 21 constituting the bottom of the paper bag or the leakage of the filling up to a total of 10 drops, the number of times the paper bag has been dropped up to that point, The tear point of the paper bag that caused the filling to leak was recorded.

Moreover, the common test conditions for the paper bag 71 of the comparative example and the paper bag 1 of the example of the present application in the horizontal drop test, the vertical drop test, and the side drop test were as follows.
-Material composition of the paper bag 1: The following three-layer (so-called 3P) paper bag was used.
(1) Heat-seal layer The heat-seal layer was comprised from the polyethylene layer which consists of low-density polyethylene (abbreviation: LLDPOT) with a layer thickness of 100 micrometers.
(2) Paper layer Both the first layer and the second layer of the paper layer were made of kraft paper (abbreviation: K) having a mass per unit area of 84 g / m2.
(3) Size of paper bag: bag length (full length) N of one bag is 726 mm, trunk width (length between edges at both ends in the bag width direction) is 535 mm, and bottom width M is 100 mm. did.
(4) Filler in paper bag The filler contained in the paper bag 1 was tea powder, and the weight of this filler was 20 kg.

  As shown in the results of the drop bag test of FIG. 11, in the horizontal drop test, the side drop test, and the vertical drop test, the paper bag 1 of the above embodiment of the present invention has a bag strength comparable to that of the paper bag 71 of the comparative example. In addition, as described above, the paper bag 1 of this embodiment can easily open the paper bag provided with the opening tape 25 as compared with the conventional paper bag 71 as a comparative example.

In the paper bag of the present invention, the cylindrical bag body 2 only needs to have at least one opening 3a closed, and the other opening may be completely or partially opened (opened). It can be fully or partially blocked.
For example, in the paper bag of the present invention, like the paper bag 1 of the above-described embodiment, one of the two openings 3a of the cylindrical body 3 is closed and the other opening is closed before filling with the filler. It may be a fully open paper bag (single-bottom affixed bag), or one of the openings 3a is closed and the other opening is covered with decorative paper before filling with the filling. However, it may be a paper bag (both bottom-attached bags) that is not completely closed but partially closed and provided with a filling port for filling the other opening. In the paper bag of the present invention, the cylindrical bag body 2 has at least one opening 3a closed by the folding portion 7, and the closed one opening 3a of the cylindrical bag body 2 has the makeup of this embodiment. The opening portion 25 of the decorative paper 21 that is covered with the paper 21 and is connected between the tubular bag body 2 and the decorative paper 21 covering the same by the glue portion B of this embodiment and opens one of the openings 3a. What is necessary is just to provide the 1st area | region 21a of paper 21, and the boundary part 21c.
As the means for opening the other opening of each paper bag and the means for closing the other opening, for example, means for opening the previous opening and means for closing the previous opening are used.

  In addition, although the paper bag 1 of this Example was demonstrated as a paper bag which consists of several layers, it cannot be overemphasized that the paper bag of this invention is not limited to this, The paper bag which consists of one paper layer may be sufficient.

  In the paper bag of the present invention, the first release glue applied to the gluing portion H is necessary to close the one opening 3a. This first release glue is the paper bag 1 of the above-described embodiment. It may be arranged like a line (see peeling part H of Drawing 10), and may be arranged like a dot.

  The paper bag of the present invention is suitable for a paper bag having an opening tape and easy to open.

1 ... paper bag
DESCRIPTION OF SYMBOLS 2 ... Cylindrical bag 2a ... Front 3a ... One opening 3 ... Cylindrical body 7 ... Folding part 8 ... A pair of 1st folding part 9 ... A pair of 2nd folding part 10 ... One folding part 11 ... The other Folding part 11a ... tip 21 of the other folding part ... decorative paper 21a ... first area 21b ... second area 21c ... boundary 25 ... opening tape 33 ... first cut 41 ... second cut B1 ... first Two peeling glues B2 ... adhesive glue B ... glue part H ... glue part L1 ... fold line L2 of first fold part ... fold line L3 of one fold part ... fold line S of the other fold part ... space for putting a finger R: Non-glue part X: Virtual center line connecting the first ends of the first folding parts

Claims (1)

A cylindrical bag body in which at least one opening of the cylindrical body is closed;
Decorative paper covering one of the closed openings of the cylindrical bag body;
It consists of a second release glue and an adhesive glue, and has a glue part that connects the cylindrical bag and the decorative paper,
A pair of folds closing one opening of the cylindrical bag body are a pair of first fold parts that are respectively continuous with the respective side ends of the cylindrical bag body, and a pair of fold parts that are respectively continuous with the front surface and the back surface of the cylindrical bag body. A paper bag having a second fold of
The decorative paper includes a first area to which the second release glue is attached, a second area to which the adhesive glue is attached, and a boundary portion formed between the first area and the second area. ,
The decorative tape opening tape that opens one of the openings comprises a first region and a boundary,
Decorative paper
A first notch provided at the boundary and having one end facing the outer edge of the decorative paper;
A second notch provided in the second region and having one end facing the boundary, the second notch being disposed along the other folded portion disposed on the outside of the pair of second folded portions A paper bag having a notch.

Images