Bag-making materials

Abstract

To provide a bag-making material which can be stably fed.SOLUTION: A bag-making material 10 comprises a storage part 2 and an extension part 3. The extension part 3 has: a seal portion 31 in which part of paper materials facing each other in the thickness direction crossing in the longitudinal direction and the width direction are stuck together; a non-seal portion 32 in which the other parts except the part of paper materials among an area facing in the thickness direction are not stuck together, and the paper materials in the other parts facing each other in the thickness direction communicate with each other via an internal space 2A and form an internal passage 3A for circulating air; and a pore 3H through which the paper materials in the extending portion 3 except the part and the other parts penetrate in the thickness direction, and communicate with the outside and also communicate with the internal passage 3A.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a strip-shaped bag-making material supplied during the production of bags.

Background Art

[0002] As one of the materials for manufacturing bags, a tubular bag-making material folded in a strip shape is known. Such a bag-making material includes a material that is cut at a planned cutting line provided with a predetermined interval in the longitudinal direction according to the dimensions of the bag to be manufactured, and the cut portion becomes a bag. As an example of a technique using the above-described bag-making material, a bag-making material wound in a roll shape is fed out while being sandwiched between a pair of rollers, and a part of the bag-making material supplied by this feeding is adsorbed and spread, and a cutting process at a planned cutting line is performed. A technique has been proposed (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, if air exists inside the tubular bag-making material (so-called inside the tube), the supply of the bag-making material may become unstable due to the internal air. For example, when a bag-making material provided with a portion that has been pre-bonded is supplied, the internal air is blocked at the bonded portion, causing the bag-making material to bulge and deform, which may cause wrinkles or twists in the bag-making material and even deviation from the supply path. Therefore, there is room for improvement in providing a bag-making material that can be stably supplied.

[0005] This invention was conceived in light of the above-mentioned problems, and one of its objectives is to provide a bag-making material that can be supplied stably. However, beyond this objective, another objective of this invention may be to achieve effects and benefits derived from the various configurations shown in the "Modes for Carrying Out the Invention" section below, which cannot be obtained with conventional technology. [Means for solving the problem]

[0006] The box-making materials disclosed herein have the following configurations (1) to (5). (1) A bag-making material made of paper material that is both a strip and a tube, having a flat extension portion extending from a three-dimensional storage portion for containing contents, wherein the bag portion, which is the part to be made into a gusseted bag, is arranged in the longitudinal direction intersecting the width direction via a planned cutting line along the width direction, and the bag portion is arranged in the longitudinal direction intersecting the width direction, and the bag portion is a part to be made into a gusseted bag with a gusset, having a flat extension portion extending from the three-dimensional storage portion for containing contents, and is a bag-making material having a strip and a tubular shape along both the longitudinal direction and the width direction, The bag portion includes a part corresponding to the storage portion, which is located adjacent to the planned cutting line in one of the longitudinal directions, and has an internal space corresponding to the space in which the contents are stored, The bag portion comprises a portion corresponding to the extended portion, which is arranged adjacent to the other longitudinal direction with respect to the planned cutting line and adjacent to one longitudinal direction with respect to the housing portion, The extension portion is, A seal portion formed by bonding a part of the paper material facing the thickness direction that intersects both the longitudinal direction and the width direction, A non-sealed portion is formed between the paper materials facing each other in the thickness direction, with the exception of the aforementioned portion, and the other parts are not bonded together, and the other parts communicate with the internal space and form an internal passage through which air can circulate between the paper materials facing each other in the thickness direction, The extension portion has a hole through which the paper material in the portion excluding the aforementioned part and the aforementioned other part penetrates in the thickness direction and communicates with the outside and with the internal passage. A bag-making material characterized by the following features. (2) The non-sealed portion is located in the other portion where only two layers of the paper material are provided in the thickness direction. The bag-making material described in (1), characterized by the above. (3) The non-sealed portion is located in the other portion where four layers of the paper material are provided in the thickness direction. The bag-making material according to (1) or (2), characterized in that it is a bag-making material. (4) The aforementioned hole is provided as a handhole that penetrates the extended portion. A bag-making material characterized by any one of (1) to (3). (5) In the aforementioned hole, the paper material in the portion of the extension excluding the aforementioned part and the aforementioned other part is provided in one direction in the thickness direction, and only the other direction in the thickness direction penetrates through the hole. A bag-making material characterized by any one of (1) to (4). [Effects of the Invention]

[0007] According to this invention, it is possible to provide bag-making materials that can be supplied stably. [Brief explanation of the drawing]

[0008] [Figure 1] This is a plan view showing a bag-making material according to one embodiment. [Figure 2] This is a schematic diagram showing the view along the line II-II in Figure 1. [Figure 3] This is a schematic diagram showing the view from arrow III-III in Figure 1. [Figure 4] This is a schematic diagram showing the view from arrow IV-IV in Figure 1. [Figure 5] This is a perspective view showing a gusseted bag manufactured from a bag-making material according to one embodiment. [Figure 6] This is a plan view showing the main parts of the bag-making material according to the first modified example. [Figure 7] This is a schematic diagram showing the view from arrow VII-VII in Figure 6.

Best Mode for Carrying Out the Invention

[0009] Hereinafter, the bag-making material as an embodiment will be described. The bag-making material of the present embodiment is a strip-shaped material supplied for manufacturing a gusseted bag and is made of a paper material. The contents to be packaged are accommodated in the gusseted bag manufactured from this bag-making material. In the following embodiment, a toilet roll is exemplified as the contents accommodated in the gusseted bag manufactured from the bag-making material. However, the contents accommodated in the present gusseted bag are not limited to toilet rolls, and may be household toilet papers such as tissue papers and kitchen rolls, or other articles.

[0010] In the present embodiment, the directions used in the description are defined as follows. In the description of the gusseted bag, on the premise of the posture in which the gusseted bag is placed on a horizontal plane, the vertical direction and the horizontal direction that are orthogonal (cross) to each other are used. The vertical direction is a direction along both the downward direction (denoted as "D" in the drawing) along which gravity acts and the upward direction (denoted as "U" in the drawing) opposite to the downward direction. The horizontal direction is a direction along the horizontal direction. For the horizontal direction, it is a direction along the four directions of the front (denoted as "F" in the drawing), the rear (denoted as "B" in the drawing), the left (denoted as "L" in the drawing), and the right (denoted as "R" in the drawing). The front and the rear are directions opposite to each other, the left and the right are directions opposite to each other, and the front-rear direction and the left-right direction are orthogonal (cross) to each other.

[0011] In the description of the bag-making material, the longitudinal direction, the width direction (denoted as "CD" in the figure), and the thickness direction (denoted as "TD" in the figure) that are orthogonal (cross) to each other are used. The longitudinal direction and the width direction are directions along the direction in which the bag-making material extends in a strip shape. The longitudinal direction corresponds to the vertical direction of the gusset bag and follows the supply direction of the bag-making material (indicated as "MD" in the diagram). This supply direction is the so-called "paper feeding direction." Upstream and downstream are determined based on the supply direction of the bag-making material. One longitudinal direction is defined as the direction toward the upstream side in the supply direction of the bag-making material, and the other longitudinal direction is defined as the direction toward the downstream side in the supply direction of the bag-making material.

[0012] The width direction corresponds to the width of the strip formed by the bag-making material, and also to the width of the gusset bag. Of the left and right sides of the gusset bag, one corresponds to one side of the width direction, and the other corresponds to the other side of the width direction. The thickness direction is the direction that penetrates the bag-making material, and it also corresponds to the front-to-back direction of the gusset bag. Of the front and back of the gusset bag, one corresponds to one direction in the thickness direction, and the other corresponds to the other direction in the thickness direction.

[0013] [I. One Embodiment] In the embodiment described below, the configuration of the bag-making material is described in item [1]. Then, the function and effect of the configuration in item [1] are described in item [2]. [1. Structure] This section [1] outlines the structure of a gusseted bag manufactured from bag-making materials in subsection [1-1], and then details the structure of the bag-making materials in subsection [1-2]. Below, we will illustrate a gusseted bag that is symmetrical in the front-to-back direction and symmetrical in the left-to-right direction, and give an example of bag-making materials that are symmetrical in the width direction.

[0014] [1-1. Gusseted bag] As shown in Figure 5, the gusseted bag 1' is a bag with a gusset, from which a handle portion 3' (extended portion) extends. The storage portion 2' is a three-dimensional part that stores the toilet roll 9'. The handle portion 3' is a flat portion that extends upward from the storage portion 2'. This handle portion 3' is provided with a hand hole 3H' that goes through from front to back. The hand hole 3H' is a through-hole provided to make it easier for the user to hold and carry the gusseted bag 1'. If this gusseted bag 1' is likened to a gable-topped milk carton, the rectangular prism-shaped part filled with milk corresponds to the storage section 2', and the top-sealed section corresponds to the handle section 3'.

[0015] In the gusseted bag 1' described here, the paper materials forming the four parts 1F', 1B', 1L', and 1R' listed below are glued together. • Front section 1F': The part located in front of the gusset bag 1'. • Back section 1B': The part located behind the gusset bag 1'. • Left gusset section 1L': The part located on the left side of the gusset bag 1'. • Right gusset section 1R': The part located on the right side of the gusset bag 1'.

[0016] Between the front section 1F' and the rear section 1B', the left and right gusset sections 1L' and 1R' are positioned. The gusset sections 1L' and 1R' form the gusset of the gusseted bag 1' and have a valley fold line 1V' that extends vertically in the middle of the front-to-back direction. Each gusset section 1L' and 1R' is provided so as to be foldable in half along the valley fold line 1V'.

[0017] When the valley fold of the valley fold line 1V' is unfolded, the front part 1F' and the back part 1B' are separated, and a space for storing the toilet roll 9' is formed inside the gusset bag 1'. In this unfolded state, the toilet roll 9' is stored in the gusset bag 1'. On the other hand, when the gusset sections 1L' and 1R' are folded along the valley fold line 1V', the front section 1F' and the back section 1B' are close together, and no space is formed inside the gusset bag 1' to accommodate a toilet roll 9'. This valley-folded state is a state in which the gusset bag 1' is folded into a sheet-like shape, and is used, for example, when storing the gusset bag 1'. The gusseted bag 1' described above is manufactured sequentially from the bag-making materials described below.

[0018] [1-2. Bag-making materials] As shown in Figure 1, the bag-making material 10 is a material that extends in a strip shape. The bag portion 1, which corresponds to the gusset bag 1' to be manufactured, is arranged along the longitudinal direction of this bag-making material 10, and cutting lines C (shown as dashed lines in Figure 1) are provided along the width direction at the boundaries between the bag portions 1. Each bag portion 1 is provided with a storage portion 2 corresponding to the storage portion 2' of the gusset bag 1', and a handle portion 3 (extension portion) corresponding to the handle portion 3' of the gusset bag 1'.

[0019] In this bag-making material 10, the storage section 2 is positioned adjacent to the upstream side (one side in the longitudinal direction) of the supply direction relative to the planned cutting line C, and the handle section 3 is positioned adjacent to the downstream side (the other side in the longitudinal direction) of the supply direction relative to the planned cutting line C. In other words, in the bag-making material 10, the storage section 2 and the handle section 3 are arranged alternately along the longitudinal direction. As described above, the bag-making material 10, in which the bag sections 1 are arranged longitudinally along the planned cutting line C, is subjected to bag-making processes such as widening the storage section 2 of each bag section 1 and cutting along the planned cutting line C. In this way, gusset bags 1' are manufactured sequentially.

[0020] As shown in Figures 2 to 4, the bag-making material 10 is formed in a cylindrical shape by bonding together the four materials 1F, 1B, 1L, and 1R listed below. The bag-making material 10 is formed by bonding these materials 1F, 1B, 1L, and 1R together in a cylindrical shape and then folding them into a strip. • Front material 1F: Material provided on one side in the thickness direction in bag-making material 10 • Back material 1B: A material provided on the other side in the thickness direction of the bag-making material 10. • Left gusset material 1L: A material provided on one side in the width direction in bag-making material 10. • Right gusset material 1R: Material provided on the other side in the width direction in bag-making material 10

[0021] The areas in which the above materials 1F, 1B, 1L, and 1R extend in the longitudinal direction are the same as the areas in which the bag-making material 10 extends in the longitudinal direction. Also, the areas in which the front material 1F and back material 1B extend in the width direction are the same as the areas in which the bag-making material 10 extends in the width direction. On the other hand, the area in which the left gusset material 1L extends in the width direction extends to only one side of the area in which the bag-making material 10 extends in the width direction. Also, the area in which the right gusset material 1R extends in the width direction extends to only the other side of the area in which the bag-making material 10 extends in the width direction.

[0022] Front material 1F and back material 1B are materials that extend in a planar manner without being folded (without folds or creases). On the other hand, each of the gusset materials 1L and 1R is folded in half along the valley fold line 1V, and is sandwiched between the front material 1F and the back material 1B in a state where one layer and the other layer are separated by the valley fold line 1V. The left gusset material 1L and the right gusset material 1R are positioned with a gap between them in the center in the width direction.

[0023] As described above, the bag-making material 10, in which materials 1F, 1B, 1L, and 1R are arranged, is broadly divided into the following two parts according to the number of layers of materials 1F, 1B, 1L, and 1R. • Fourth layer section P4: Front material 1F and back 1B, and a folded gusset. A section where either material 1L or 1R is stacked in four layers. • Two-layer section P2: The area where the front material 1F and the back material 1B are superimposed in two layers.

[0024] The four-layer section P4 is the area of ​​the bag-making material 10 excluding the central region in the width direction where the gusset materials 1L and 1R are not provided, and is provided on both the one and the other sides in the width direction. Focusing on one side in the width direction, in the four-layer section P4, a total of four layers are stacked: one layer made up of front material 1F, two layers made up of left gusset material 1L which is folded in half along the valley fold line 1V, and one layer made up of back material 1B.

[0025] As described above, the four-layer section P4 has four layers of material 1F, 1B, 1L, and 1R in the thickness direction, whereas the two-layer section P2, which will be described next, has only two layers in the thickness direction: front material 1F and back material 1B. The two-layer section P2 is the central region in the width direction of the bag-making material 10 where gusset materials 1L and 1R are not provided. In this two-layer section P2, a total of two layers are laminated, consisting of one layer of front material 1F and one layer of back material 1B, and the front material 1F and back material 1B face each other in the thickness direction without the gusset materials 1L and 1R in between.

[0026] The front material 1F includes the part that corresponds to the front section 1F' of gusset bag 1' as described above. Similarly, the back material 1B includes the part that corresponds to the back section 1B' of gusset bag 1'. Likewise, the gusset materials 1L and 1R include the parts that correspond to the gusset sections 1L' and 1R' of gusset bag 1'. The materials 1F, 1B, 1L, and 1R described above differ in how they are joined at the storage section 2 of each bag 1 and how they are joined at the handle section 3.

[0027] Furthermore, various known paper materials can be used for materials 1F, 1B, 1L, and 1R, and various bag-making materials with paper as the main component can be employed. In one embodiment illustrated here, the front material 1F and back material 1B are made of single-sided laminated paper, in which a thermoplastic welded layer is not laminated on the front side, but is laminated on the back side. On the other hand, the left and right gusset materials 1L and 1R are made of double-sided laminated paper, in which a thermoplastic welded layer is laminated on both the front and back sides.

[0028] However, double-sided laminated paper may be used not only for the left and right gusset materials 1L and 1R, but also for the front material 1F and back material 1B. Alternatively, materials 1F, 1B, 1L, and 1R may have a sealant applied to the parts that will be joined together. In other words, it is sufficient if a bonding agent is added to at least the areas where materials 1F, 1B, 1L, and 1R are to be bonded together.

[0029] As shown in Figure 2, the storage section 2 has a sealing layer 2S pre-installed only on the edges in the width direction, which is used to bond materials 1F, 1B, 1L, and 1R together. Focusing on one side in the width direction, two types of sealing layers 2S (shown as halftones in Figures 1 and 2) are provided in the housing section 2. • First sealing layer 21S: Front material 1F and left gusset material 1L 2S adhesive layer to be bonded • Second sealing layer 22S: Back material 1B and left gusset material 1L 2S adhesive layer to be bonded

[0030] The storage section 2, in which materials 1F, 1B, 1L, and 1R are bonded together by a sealing layer 2S, has an internal space 2A corresponding to the space in the gusset bag 1' in which the toilet roll 9' is stored. The internal space 2A is a cylindrical space surrounded by materials 1F, 1B, 1L, and 1R, and can be said to be a space that exists in most of the storage section 2, excluding the edges in the width direction. When the bag section 1 is manufactured into the gusset bag 1', this internal space 2A is expanded to a size that can accommodate the toilet roll 9' by unfolding the valley folds 1V of the gusset materials 1L and 1R, separating the front material 1F and the back material 1B.

[0031] As shown in Figure 3, the handle portion 3 is pre-filled with a sealing layer 3S in the width direction, which is used to bond materials 1F, 1B, 1L, and 1R together. In one embodiment, the handle portion 3 is provided with a sealing layer 3S (shown as halftones in Figures 1 and 3) only in the four-layer portion P4. Focusing on one side in the width direction, three types of sealing layers 3S are provided as listed below. • First sealing layer 31S: Front material 1F and left gusset material 1L 3S adhesive layers to be bonded together • Second sealing layer 32S: Back material 1B and left gusset material 1L 3S adhesive layers to be bonded together • Third sealing layer 33S: The two halves of the left gusset material 1L, with the valley fold line 1V in between, are separated. 3S adhesive layers to be bonded together

[0032] In the handle portion 3, the area bonded by the sealing layers 31S, 32S, and 33S is defined as the sealed portion 31. Thus, in addition to the sealed portion 31, the handle portion 3 also has a non-sealed portion 32 where the front material 1F and back material 1B facing each other in the thickness direction are not bonded together. Furthermore, a hole 3H corresponding to the hand hole 3H' described above in the explanation of the gusset bag 1' is also provided in the handle portion 3. That is, a hole 3H is provided as the hand hole 3H' of the handle portion 3'.

[0033] The handle portion 3 illustrated in Figure 1 is provided with a sealing portion 31 and a non-sealing portion 32 along most of its longitudinal direction, and a hole portion 3H is located in the longitudinal region where the sealing portion 31 and non-sealing portion 32 are provided. The handle portion 3 is provided with a margin portion 30 on the upstream side in the supply direction relative to the sealing portion 31 and non-sealing portion 32. The margin portion 30 is provided to allow the storage portion 2 to expand even if the bag-making material 10 is cut slightly downstream in the supply direction from the planned cutting line C. This margin portion 30 is bonded together in the same way as the storage portion 2 and is provided between the sealed portion 31 and the unsealed portion 32 and the planned cutting line C. In other words, the position of the planned cutting line C is set slightly upstream in the supply direction from the sealed portion 31. The margin portion 30 may be left as is without being cut off during the manufacturing process of the gusset bag 1', but it is preferable to cut it off in the same way as the trim portion 23 described later.

[0034] The seal portion 31 is the area where all materials 1F, 1B, 1L, and 1R facing each other in the thickness direction are bonded together, and is located in the fourth layer P4 of the handle portion 3. The seal portion 31, where all materials 1F, 1B, 1L, and 1R of the fourth layer P4 are bonded together, can be said to be the part responsible for ensuring the strength of the handle portion 3. Therefore, the strength of the handle portion 3' in the gusset bag 1' manufactured from the bag-making material 10 is ensured.

[0035] The non-sealed portion 32 is the area where the front material 1F and back material 1B facing each other in the thickness direction are not bonded together, and is provided in the two-layer portion P2 of the handle portion 3. In other words, the non-sealed portion 32 is the area in the handle portion 3 where at least a portion of the materials 1F, 1B, 1L, and 1R face each other in the thickness direction, excluding the margin portion 30 and the sealed portion 31 (the other portion). Figure 1 shows an example in which the non-sealed portion 32 is provided over the entire area of ​​the two-layer portion P2.

[0036] Between the front material 1F and the back material 1B in this non-sealed section 32, an internal passage 3A is formed that communicates with the internal space 2A of the storage section 2 and allows air to circulate. The internal passage 3A exemplified here extends along the longitudinal direction. The internal space 2A of the containment section 2 is present in most of the space except for the edges in the width direction, while the internal passage 3A of the non-sealed section 32 is only a part of the center in the width direction. Therefore, the internal space 2A can be described as a wide passage (mainway), and the internal passage 3A can be described as a narrow passage (bottom).

[0037] As described above, the non-sealed portion 32 that forms the internal passage 3A is in communication with the hole portion 3H which will be described next. As shown in Figure 4, the hole 3H is a portion where there are no elements facing it in the thickness direction, and it is also the portion of the handle portion 3 that is obtained by removing the margin portion 30 and the portions where the seal portion 31 and the non-seal portion 32 are provided. This hole 3H penetrates the handle portion 3 in the thickness direction, communicates with the outside, and also communicates with the internal passage 3A.

[0038] To summarize the internal space 2A, internal passage 3A, and hole 3H, the internal passage 3A is a flow passage arranged inside the handle portion 3 along the longitudinal direction in order to guide the air from the internal space 2A to the hole 3H. The hole 3H is a flow passage that communicates with the internal passage 3A and is arranged in the handle portion 3 to communicate with the outside by penetrating at least a portion of the materials 1F, 1B, 1L, and 1R, in order to discharge the air from this internal passage 3A to the outside. In other words, the internal space 2A, internal passage 3A, and hole 3H are provided in order to circulate the air from the internal space 2A along the longitudinal direction to the hole 3H in the handle portion 3 and discharge it, rather than to the containment portion 2.

[0039] In addition, the housing section 2 is subdivided into three parts arranged in the order of main section 21, bottom seal section 22, and trim section 23 from the upstream side to the downstream side in the supply direction. The main section 21 corresponds to the part of the gusset bag 1' that faces the toilet roll 9'. The bottom seal section 22 is the part that is sealed after the toilet roll 9' is placed in the main section 21. The trim section 23 is the part that is cut off after the bottom seal section 22 is sealed.

[0040] The trim portion 23 of the bag-making material 10 illustrated here is provided with a hole 2H that penetrates in the thickness direction. Figure 1 shows an example in which the hole 2H is provided in the region where the two-layer portion P2 extends in the width direction. However, the hole 2H may also be provided in the bottom seal portion 22, or in the region where the four-layer portion P4 extends in the width direction. Furthermore, from the viewpoint of preventing foreign matter from entering the storage portion 2' after bag making, it is preferable that the main portion 21 of the storage portion 2 does not have a structure that penetrates at least a part of the materials 1F, 1B, 1L, and 1R, such as the holes 2H and 3H.

[0041] [2. Action and Effects] Conventionally, if air is present inside a cylindrical bag-making material that is folded into a strip, the supply of the bag-making material may become unstable due to the air inside. For example, when a bag-making material with pre-bonded sections is supplied, the air inside may be trapped at the bonded section, causing the bag-making material to bulge or deform, which may lead to wrinkles, kinks, and even deviation from the supply path. Alternatively, if the bag-making material is cut at a position deviating from the planned cutting line, the pitch of the bags cut from the material may be inconsistent. When a pair of rolls are used to hold the bag-making material in place for supplying it, if a large amount of air accumulated inside the bag-making material is trapped at the pre-bonded section and bulges, the supply of the bag-making material may become impossible. Therefore, there is room for improvement in providing bag-making materials that can be supplied stably. Compared to the conventional bag-making materials described above, the bag-making material 10 of one embodiment has the above-described configuration, and therefore can obtain the following functions and effects.

[0042] (1) With the bag-making material 10, even if air is present in the internal space 2A of the storage section 2, this air can be discharged to the outside through the internal passage 3A and the hole 3H of the non-sealed section 32 of the handle section 3. Therefore, the supply of the bag-making material 10 can be stabilized. Therefore, it is possible to provide bag-making materials 10 that can be supplied stably. For example, when a bag-making material 10 is supplied, which has pre-bonded sealed sections 31 between materials 1F, 1B, 1L, and 1R by a sealing layer 3S, even if air is present in the internal space 2A, this air is not blocked by the sealed section 31 but flows through the internal passage 3A of the non-sealed section 32 and is discharged from the hole 3H. In this way, swelling and deformation of the supplied bag-making material 10 can be suppressed.

[0043] Because swelling and deformation of the bag-making material 10 are suppressed, wrinkles and creases in the bag-making material 10 can be suppressed, and deviations from the supply route of the bag-making material 10 can also be suppressed. Consequently, the bag-making material 10 is not cut at a position deviating from the planned cutting line C, and variations in the pitch (size) of the manufactured gusset bags 1' are suppressed. When the bag-making material 10 is supplied while sandwiched between a pair of rolls, the air present in the internal space 2A of the bag-making material 10 is pushed out by the pair of rolls and discharged through the internal passage 3A and the hole 3H. As a result, the swelling of the bag-making material 10 caused by the air in the internal space 2A being blocked by the sealing portion 31 is suppressed. From this point of view as well, the bag-making material 10 can be supplied stably, and this contributes to improving the operating rate of the line that manufactures gusset bags 1' without interrupting the supply of bag-making material 10.

[0044] (2) The non-sealed portion 32 of the handle portion 3 is located in the two-layer portion P2, which consists only of two layers made of front material 1F and back material 1B. Compared to the four-layer portion, which consists of four layers made of all materials 1F, 1B, 1L, and 1R, this makes it easier to separate the front material 1F and the back material 1B, and ensures the formation of an internal passage 3A. As a result, air in the internal space 2A can be reliably circulated to the hole portion 3H. Thus, the bag-making material 10 can be supplied more stably.

[0045] (3) Since the hole 3H of the handle portion 3 is provided as a hand hole 3H' of the handle portion 3', the hand hole 3H' which is intended to make it easier for the user to carry the gusset bag 1' by gripping it can also be used as a hole 3H for releasing air from the internal space 2A. In other words, the hole 3H, which becomes the hand hole 3H', plays a stable supply function that contributes to the stable supply of the bag-making material 10 during the manufacturing of the gusset bag 1' in which the bag-making material 10 is supplied, and plays a portability-enhancing function that enhances the user's portability in the manufactured gusset bag 1'. Therefore, the hole 3H provided as the hand hole 3H' of the handle portion 3' can exhibit a stable supply function before the manufacturing of the gusset bag 1', and can exhibit a portability-enhancing function after the manufacturing of the gusset bag 1'.

[0046] [II. Variant Examples] The embodiments described above are merely illustrative, and there is no intention to exclude various modifications or applications of techniques not explicitly stated in these embodiments. Each configuration of these embodiments can be modified in various ways without departing from their spirit. Furthermore, they can be selected and combined as needed.

[0047] For example, the non-sealed portion is not limited to being located in the entire area of ​​a two-layer portion provided only by the front material and the back material; the non-sealed portion may be limited to the area downstream of the hole in the supply direction (the other side in the longitudinal direction) (the area upstream of the hole in the supply direction may be included in the sealed portion). Furthermore, as shown in Figures 6 and 7, the non-sealed portion 32'' may be located in a four-layer portion P4'' which is provided with four layers of materials 1F'', 1B'', 1L'', and 1R'' (see Figure 7), rather than in a two-layer portion P2''. Figure 7 shows an example in which an internal passage 3A'' is formed between the front material 1F'' side (either one in the thickness direction or the other) of the two halves of the left gusset material 1L'' that are valley-folded along the valley fold line 1V'' and the front material 1F''. This internal passage 3A'' is in communication with a hole 3H'' that communicates with the outside. The bag-making material 10″ shown in Figure 6 is a material for manufacturing gusseted bags without hand holes. It does not have holes designated as hand holes, but rather small holes 3H″ that do not function as hand holes.

[0048] However, the internal passage 3A'' in this modified example may communicate with a hole provided as a hand hole, or with a hole provided separately from the hand hole. In one embodiment, a bag-making material 10 for manufacturing a gusset bag 1'' having a handle portion 3'' with a hand hole 3H'' was illustrated. However, in a bag-making material for manufacturing a gusset bag without a hand hole, the part corresponding to the handle portion 3 may be called the handle portion as is, since it contributes to portability even if a hand hole 3H'' is not provided. Alternatively, it may be called an extension portion to describe its extension form relative to the storage portion, or it may be called a top seal portion to describe its bonding form and arrangement.

[0049] Furthermore, the holes are not limited to a form in which they penetrate all the material in the thickness direction of the handle portion, excluding the margin portion, the sealed portion, and the non-sealed portion. They may also penetrate only one or the other material in the thickness direction of the material in the handle portion, excluding the margin portion, the sealed portion, and the non-sealed portion. To give a specific example, as illustrated in Figure 7, in the portion of the hole 3H'' excluding the margin portion 30'' and the sealing portion 31'' and non-sealed portion 32'' of the handle portion 3'', left gusset material 1L'' and back material 1B'' are provided on one side in the thickness direction (downward in Figure 7), and no material is provided on the other side in the thickness direction (upward in Figure 7) (only the front material 1F'' may be provided through it).

[0050] Regarding the position in the thickness direction through which the hole 3H″ penetrates, if the bag-making material 10″ is shipped in a roll-like state, setting the other position in the thickness direction on the outer circumference (and the other position in the thickness direction on the inner circumference) allows for smooth discharge of air from the roll-like bag-making material 10″. Alternatively, if the bag-making material 10″ is shipped in an accordion-folded state like fanfold paper, it is preferable that in other bag sections 1″ adjacent to a bag section 1″ which has a hole 3H″ that penetrates in the other direction of the thickness, the hole 3H″ that penetrates in one direction of the thickness is provided. By setting the direction in which the hole 3H″ penetrates alternately between one and the other direction of the thickness, it is possible to smoothly discharge the air from the accordion-folded bag-making material 10″.

[0051] Furthermore, non-sealed sections may be provided in both the four-layer and two-layer sections, and in addition to hand holes, other holes (for example, the hole 3H'' mentioned above) may also be provided. Furthermore, the bag-making material is not limited to a form in which four materials are bonded together; it may also be a form in which three or fewer materials are bonded together, or a form in which five or more materials are bonded together. With a bag-making material made of three or fewer materials bonded together, the bonding work required to manufacture the bag-making material can be simplified. With a bag-making material made of five or more materials bonded together, various properties such as sealing ability, waterproofing ability, and printing characteristics can be set for each part in which each material is used by selecting the appropriate materials, thereby contributing to improved marketability. [Explanation of Symbols]

[0052] 1 bag part 10. Bag-making materials 1st Floor Front Materials 1B Backing material 1L Left gusset material 1R Right gusset material 1' Gusset bag 1F′ Front section 1B′ Back part 1L' Left gusset section 1R' Right gusset section 1V′ valley fold line 2. Storage area 21 Main part 21S First sealing layer 22 Bottom seal section 22S Second sealing layer 23 Trim section 2A Internal space 2S sealing layer 2H hole 2′ Storage section 3 Handle part (extending part) 30 Margin section 31 Seal part 31S First sealing layer 32 Non-sealed portion 32S Second sealing layer 33S Third sealing layer 3A Internal passage 3H Hole 3H′ hand hole 3S sealing layer 3′ Handle part (extending part) 9' Toilet roll (contents) C Cutting line P2 double layer part P4 4th layer part

Claims

1. A bag-making material made of paper material that is both a strip and a tube, having a flat extension portion extending from a three-dimensional storage portion for containing contents, wherein the bag portion, which is the part to be made into a gusseted bag, is arranged in the longitudinal direction intersecting the width direction via a planned cutting line along the width direction, and the bag portion is arranged in the longitudinal direction intersecting the width direction, and the bag portion is a part to be made into a gusseted bag with a gusset, having a flat extension portion extending from the three-dimensional storage portion for containing contents, and is a bag-making material having a strip and a tubular shape along both the longitudinal direction and the width direction, The bag portion includes a part corresponding to the storage portion, which is located adjacent to the planned cutting line in one of the longitudinal directions, and has an internal space corresponding to the space in which the contents are stored, The bag portion comprises a portion corresponding to the extended portion, which is arranged adjacent to the other longitudinal direction with respect to the planned cutting line and adjacent to one longitudinal direction with respect to the housing portion, The extension portion is, A seal portion formed by bonding a part of the paper material facing the thickness direction that intersects both the longitudinal direction and the width direction, A non-sealed portion is formed between the paper materials facing each other in the thickness direction, with the exception of the aforementioned portion, and the other parts are not bonded together, and the other parts communicate with the internal space and form an internal passage through which air can circulate between the paper materials facing each other in the thickness direction, The extension portion has a hole through which the paper material in the portion excluding the aforementioned part and the aforementioned other part penetrates in the thickness direction and communicates with the outside and with the internal passage, The aforementioned hole is provided as a handhole that penetrates the extended portion. The sealing portion is formed by bonding together all of the four layers of the paper material provided in the thickness direction. The non-sealed portion is located in the other portion where only two layers of the paper material are provided in the thickness direction. A bag-making material characterized by the following features.

2. In the aforementioned hole, the paper material in the portion of the extension excluding the aforementioned part and the aforementioned other part is provided in one direction in the thickness direction, and only the other direction in the thickness direction penetrates through the hole. The bag-making material according to feature 1.

Images