JP2020192994A - Cushioning bag - Google Patents

Abstract

To inexpensively provide a cushioning bag capable of protecting a content from external pressure and exhibiting a beautiful appearance without executing lamination processing.SOLUTION: A cushioning bag 1 is a double bag comprising an outer bag 2 having a trunk which includes a first base material 91 and an inner bag 3 having a trunk which includes a second base material 92 and disposed inside the outer bag 2. The cushioning bag 1 includes a storage part S1 provided inside the inner bag 3, and a partition seal part 7 having a thermal adhesive part H1 of an inner surface of the first base material 91 and an outer surface of the second base material 92 and provided to a region facing the storage part S1. The partition seal part 7 forms a plurality of gas cells 10 between the first base material 91 and the second base material 92, and each of the gas cells 10 seals cushioning air.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a cushioning bag, particularly a cushioning bag that can protect the contents from external pressure without laminating and can give an aesthetic appearance.

As a cushioning bag that protects the contents from external pressure, for example, the following bag has been proposed. A transport bag having a cushioning sheet that forms a cushioning portion inside the outer bag has been proposed (see, for example, Patent Document 1). In a cushioning packaging formed by facing the first surface portion and the second surface portion and joining the peripheral portions while leaving an opening, the interior film and the exterior film are overlapped on the first surface portion and the second surface portion, respectively. (See, for example, Patent Documents 2 and 3), a cushioning packaging is proposed in which a cushioning gas is injected into a space for a cushioning gas formed between an interior film and an exterior film. A gas introduction path for introducing gas is provided at one end of the film bag, gas check valves for injection are connected to each part of the gas introduction path, and a plurality of gas cell rows are provided in the bag. A gas cushioning material has been proposed in which a gas cell row is filled with gas from an introduction path through each injection check valve (see, for example, Patent Document 4).

JP-A-11-292144 Japanese Unexamined Patent Publication No. 2010-89808 JP-A-2017-39523 Japanese Unexamined Patent Publication No. 2016-50028

However, in Patent Document 1, since the cushioning portion is only contained in the outer bag and is not adhered to the outer bag, the cushioning portion may come off from the outer bag. In addition, it is necessary to blow gas with a straw, which causes a problem that it takes time and cost to prepare. In Patent Document 2, there is a problem that the process for arranging the packaged object so as to be surrounded by the buffer gas space so that the packaged object is floated is complicated and costly. In addition, the size of the packaged object is limited because the size of the bag body needs to be larger than the size of the packaged object. Further, it is necessary to blow a buffer gas, which causes a problem that it takes time and cost to prepare. Patent Document 3 also has a problem that it is necessary to blow a buffering gas, which requires time and cost to prepare. Patent Document 4 has a problem that the structure is complicated and a large-scale manufacturing facility is required.

It is an object of the present disclosure to protect the contents from external pressure without laminating, and to provide a cushioning bag capable of expressing aesthetics at low cost.

The cushioning bag according to the present invention includes a double outer bag having a body made of a first base material and an inner bag having a body part made of a second base material and arranged inside the outer bag. In the buffer bag which is a bag, the buffer bag has an accommodating portion provided inside the inner bag, an inner surface of the first base material provided in a region facing the accommodating portion, and the second base material. It has a compartment sealing portion having a heat-bonding portion with the outer surface of the gas, and the compartment sealing portion forms a plurality of gas cells between the first base material and the second base material, and the gas. Each of the cells is characterized by sealing the buffer air.

In the buffer bag according to the present invention, the buffer bag includes a folded portion in which the first base material and the second base material are overlapped with each other and the second base material is folded inward and folded in half. An opening provided on an edge facing the folded portion, a first side edge sealing portion connecting the folded portion and an edge facing the folded portion, and a second side facing the first side edge sealing portion. The second base material has a side edge sealing portion, and the second base material has a male-female occlusal type fitting provided on the inner surface along the edge of the opening, and the first side edge sealing portion. The second side edge sealing portion heats the inner surface of the first base material and the outer surface of the second base material along the thickness direction of the first base material and the second base material. It has an adhesive portion, a heat-bonding portion between the inner surfaces of the second base material, and a heat-bonding portion between the outer surface of the second base material and the inner surface of the first base material. The base material and the second base material are formed in a region between the portion where the base portion of the fitting is provided and the edge of the opening, the inner surface of the first base material and the outer surface of the second base material. It is preferable to have a heat-bonded portion with the surface. It can be resealed by a fitting.

In the cushioning bag according to the present invention, the cushioning bag includes a folded portion in which the first base material and the second base material are overlapped with each other and the second base material is folded inward and folded in half. An opening provided on an edge facing the folded portion, a first side edge sealing portion connecting the folded portion and an edge facing the folded portion, and a second side facing the first side edge sealing portion. The edges of the two first base materials having the side edge sealing portion and forming the edges of the opening project from the edges of the two second base materials to the side opposite to the folded portion. The first base material has a male-female occlusal type fitting provided on the inner surface of a portion of the first base material that protrudes from the edge of the second base material along the edge of the opening. The first side edge sealing portion and the second side edge sealing portion are formed on the inner surface of the first base material and the second base material along the thickness direction of the first base material and the second base material. A heat-bonding portion with the outer surface of the base material, a heat-bonding portion between the inner surfaces of the second base material, and a heat-bonding portion between the outer surface of the second base material and the inner surface of the first base material. , It is preferable to have. It can be resealed by a fitting.

In the buffer bag according to the present invention, the first base material and the second base material are joined to each other by a joint seal portion provided on the folded-back portion side of the fitting, and the joint seal portion is formed. Preferably has a heat-bonded portion between the inner surface of the first base material and the outer surface of the second base material. Since the number of joints between the first base material and the second base material is increased, the deviation between the first base material and the second base material can be further suppressed.

In the cushioning bag according to the present invention, the folded portion is formed on the inner surface of the first base material and the outer surface of the second base material along the thickness direction of the first base material and the second base material. It is preferable to have a heat-bonding portion of the above, a heat-bonding portion between the inner surfaces of the second base material, and a heat-bonding portion of the outer surface of the second base material and the inner surface of the first base material. .. It is possible to prevent the second base material from floating inward of the bag at the folded portion.

In the buffer bag according to the present invention, the buffer bag has an opening sealing portion that seals the edge of the opening, and the first side edge sealing portion or the second side edge sealing portion. Either or both have a notch for opening in the region between the opening sealing portion and the fitting, and the opening sealing portion is of the first base material and the second base material. Along the thickness direction, a heat-bonding portion between the inner surface of the first base material and the outer surface of the second base material, a heat-bonding portion between the inner surfaces of the second base material, and the second base material. It is preferable to have an outer surface of the material and a heat-bonded portion between the inner surface of the first base material. The unopened state can be ensured by the opening sealing portion.

According to the present disclosure, it is possible to provide a cushioning bag that can protect the contents from external pressure without laminating and can express the aesthetic appearance at low cost.

It is a front view which shows an example of the cushioning bag which concerns on this embodiment. This is the first example of the cross-sectional view taken along the line AA of FIG. It is a partially enlarged view of the X part of FIG. It is sectional drawing BB of FIG. It is a partially enlarged view of the Y part of FIG. It is a front view which shows the modification of the partition seal part, (a) is the form that the partition seal part is diagonally grid-like, (b) is the form that the partition seal part is circular shape, (c) is the form that a partition seal part is A form having a horizontal line shape, (d) is a form in which the partition seal portion has a large and small grid shape. It is a front view which shows an example of the modification of the cushioning bag which concerns on this embodiment. FIG. 7 is a cross-sectional view taken along the line CC of FIG. It is a front view which shows an example of the cushioning bag which has an opening sealing part. 9 is a cross-sectional view taken along the line DD of FIG. It is the second example of the cross-sectional view taken along line AA of FIG.

Next, the present invention will be described in detail by showing embodiments, but the present invention is not construed as being limited to these descriptions. The embodiments may be modified in various ways as long as the effects of the present invention are exhibited.

As shown in FIGS. 1 to 4, the cushioning bag 1 according to the present embodiment has an outer bag 2 having a body made of a first base material 91 and an outer bag having a body part made of a second base material 92. In the cushioning bag which is a double bag including the inner bag 3 arranged inside the inner bag 2, the cushioning bag 1 is provided in the accommodating portion S1 provided inside the inner bag 3 and the region facing the accommodating portion S1. It has a compartment sealing portion 7 having a heat-bonding portion H1 between the inner surface of the first base material 91 provided and the outer surface of the second base material 92, and the compartment sealing portion 7 has a partition sealing portion 7 with the first base material 91. A plurality of gas cells 10 are formed with the second base material 92, and each of the gas cells 10 seals the buffer air.

As shown in FIG. 1, the cushioning bag 1 is, for example, a quadrangular bag body when viewed from the front, with a folded portion 4 on the lower edge and a first side edge sealing portion 6A and a second side on the left and right side edges, respectively. It is preferable to have the edge sealing portion 6B and the opening 5 on the upper edge. The shape of the cushioning bag 1 is shown in FIG. 1 as having a folded-back portion 4 as an example, but the present invention is not limited to this. Further, the cushioning bag 1 may have a form that does not have the folded-back portion 4. As shown in FIG. 1, the form having the folded-back portion 4 is, for example, a bag in which the front surface film and the back surface film are formed by folding back one film. The form without the folded-back portion 4 (not shown) is, for example, a bag body in which the front surface film and the back surface film are separate films, and a bag body in which the body portion and the bottom portion are separate films such as a standing pouch. is there.

As shown in FIG. 2, the cushioning bag 1 is a double bag having an outer bag 2 and an inner bag 3. In this double bag, the first base material 91 and the second base material 92 are integrally joined by sealing portions (for example, side edge sealing portions 6A and 6B). Further, in this double bag, the first base material 91 forming the body of the outer bag 2 and the second base material 92 forming the body of the inner bag 3 are joined by the partition sealing portion 7. It has one accommodating portion S1 substantially like a bag having a single structure. The accommodating portion S1 is a space communicating with the opening 5.

As shown in FIGS. 1 and 2, the outer bag 2 is a part that constitutes the appearance of the bag. The body of the outer bag 2 is made of the first base material 91. The first base material 91 may be any material as long as it can seal the cushioning air in the gas cell 10, and is, for example, a thermoplastic resin film or natural paper.

Thermoplastic resin films include synthetic resin films and biodegradable films.

The material of the synthetic resin film is not particularly limited, but for example, polyethylene such as high-density polyethylene (HDPE), medium-density polyethylene (MDPE) or low-density polyethylene (LDPE), polypropylene (PP), and polyvinylidene chloride (PVDC). , Polyvinyl chloride (PVC), Polystyrene (PS), Polyvinyl acetate (PVAC), Polytetrafluoroethylene (PTFE), ABS resin (Acrylonitrile butadiene styrene resin), AS resin (SAN), Acrylic resin (PMMA), Polyetherketone (PA) / trade name nylon, polyacetal (POM), polycarbonate (PC), modified polyphenylene ether (m-PPE, modified PPE, PPO), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), cyclic polyolefin (COP) , Polyphenylene sulphide (PPS), polysulfone (PSF), polyethersulfone (PES), amorphous polyallylate (PAR), liquid crystal polymer (LCP), polyetheretherketone (PEEK), thermoplastic polyimide (PI), Polyamideimide (PAI), thermoplastic polyurethane (TPU), or fluororesin (PTFE). The synthetic resin film may have a single-layer structure or a laminated structure.

The biodegradable film is not particularly limited as long as it is a film made of biodegradable plastic, and is, for example, polylactic acid or polyglycolic acid. Further, the biodegradable plastic may contain polycaprolactone, polyhydroxyalkanoate, modified polyvinyl alcohol, casein or modified starch as components.

The natural paper may be Japanese paper or Western paper, but is, for example, kraft paper or paraffin paper (waxed paper). By using natural paper, it has an excellent aesthetic appearance. In addition, a sense of luxury can be created. In the present embodiment, it is preferable that one side or both sides of the natural paper has a barrier coating layer. The barrier coating layer can further suppress the deterioration of the quality of the contents. The barrier coating layer may be provided only on the inner surface of the natural paper, only on the outer surface of the natural paper, or may be provided on both the inner surface and the outer surface of the natural paper. The barrier coating layer may be biodegradable. Further, when the barrier coating layer is provided on the inner surface of natural paper, the barrier coating layer preferably has thermal adhesiveness. When the barrier coating layer is provided on the outer surface of natural paper, the barrier coating layer preferably has printability. Examples of the barrier coating layer having biodegradability, heat adhesion and printability include Shield Plus (registered trademark) manufactured by Nippon Paper Industries, Ltd.

As shown in FIGS. 1 and 2, the inner bag 3 is internally provided in the outer bag 2, and the internal space thereof is the accommodating portion S1. The body of the inner bag 3 is made of a second base material 92. The second base material 92 may be any material as long as it can seal the buffering air in the gas cell 10, and for example, the materials listed in the first base material 91 can be used.

It is preferable that either one or both of the first base material 91 and the second base material 92 has a barrier coating layer. The surface to which the barrier coating layer is applied may be either one side or both sides of the first base material 91 or the second base material 92. The barrier coating layer is, for example, thin-film deposition or coating.

It is preferable that either one or both of the first base material 91 and the second base material 92 has a concavo-convex processed portion (not shown). Since the amount of air in the gas cell 10 described later increases, the cushioning effect and the heat retaining effect are enhanced. The uneven processing portion is, for example, embossed. Further, as a base material having a concavo-convex processed portion, for example, Pearl Soft (registered trademark) can be mentioned.

Both the first base material 91 and the second base material 92 may be synthetic resin films. Since there are a wide variety of base materials, it is possible to meet various needs. Moreover, it is preferable that either one or both of the first base material 91 and the second base material 92 is a multilayer co-extruded film. Barrier properties can be imparted.

It is preferable that the first base material 91 is natural paper and the second base material 92 is a biodegradable film. The cushioning bag 1 can be a completely degradable bag body. It is preferable that one side or both sides of the natural paper has a barrier coating layer.

It is preferable that the first base material 91 is natural paper and the second base material 92 is a thermoplastic resin film. In this combination, since the surface of the natural paper has pores or irregularities caused by the entanglement of fibers, the melt or softened product of the thermoplastic resin impregnates the surface of the natural paper or the pores or irregularities of the non-woven fabric due to the capillary phenomenon. As a result, both are more firmly bonded to each other in the heat-bonding portions H1 to H13 described later. In this way, the adhesive strength is improved, so that the compatibility is good. As used herein, the term "impregnation" refers to a technique of press-fitting a thermoplastic resin material melted or softened by heat into a non-resin material and curing the material to fill a gap between the resin material and the non-resin material. That is, in the present embodiment, heat is applied to a resin material (for example, a thermoplastic resin) to melt or soften it, impregnate it in a non-resin material (for example, natural paper), and heat-seal it, not for molecular binding. .. Conventionally, heat bonding between materials that are generally melted or softened has been used for heat sealing, but in the present invention, a material that is not melted or softened by heat is impregnated with a material that is melted or softened by heat. It differs in that it is heat-sealed. The thermoplastic resin constituting the thermoplastic resin film is preferably impregnated with 20 to 100%, more preferably 50 to 90% in the thickness direction of the natural paper. Further, the thermoplastic resin constituting the thermoplastic resin film may be impregnated with more than 100% in the thickness direction of the natural paper. Here, impregnation in excess of 100% means that the thermoplastic resin constituting the thermoplastic resin film has penetrated to the outer surface of the natural paper so as to seep out.

As shown in FIG. 1, the compartment seal portion 7 is provided in a region facing the accommodating portion S1. Here, the region facing the accommodating portion S1 is the region on the folded-back portion 4 side of the fitting 8. The compartment seal portion 7 is preferably provided on both the front surface and the back surface of the cushioning bag 1. As shown in FIG. 3, the compartment sealing portion 7 has a heat-bonding portion H1 between the inner surface of the first base material 91 and the outer surface of the second base material 92. The heat-bonded portion H1 is a portion in which the inner surface of the first base material 91 and the outer surface of the second base material 92 are heat-bonded. In the heat-bonding portion H1, at least one of the first base material 91 and the second base material 92 is melted or softened by heat and fixed (fused) to the other, or the first base material 91 and the first base material 91 and the first base material 92 are fused. Both of the two base materials 92 may be melted or softened and fixed (fused) to each other. As described above, in the cushioning bag 1 according to the present embodiment, the first base material 91 and the second base material 92 are not bonded by laminating or the like, and the first base material 91 and the second base material 92 are not bonded to each other. For example, it is directly fixed by heat bonding in the compartment seal portion 7. As a result, the contents can be protected from external pressure without laminating. Further, since the partition seal portion 7 forms a regular pattern such as a grid pattern on the outer surface of the bag, the appearance can be expressed.

As shown in FIGS. 1 and 3, the gas cell 10 is a closed space surrounded by a partition seal portion 7, and an air layer is formed. In the present specification, the fact that each of the gas cells seals the buffering air means that the buffering air does not flow in and out between adjacent gas cells. The air layer of the gas cell 10 exerts an impact resistance effect. In addition, the air layer can also exhibit a heat insulating effect with excellent heat retention. Therefore, it is suitable as a take-out container for frozen foods or warmed lunch boxes.

The buffering air sealed in the gas cell 10 is either the air naturally contained in the gas cell 10 when the compartment seal portion 7 is formed, or is intended in the gas cell 10 when the compartment seal portion 7 is formed. It may be the air sent in.

In the cushioning bag 1 according to the present embodiment, as shown in FIGS. 1 and 5, the first base material 91 and the second base material 92 are joined seals provided on the folded-back portion 4 side of the fitting 8. It is preferably bonded to each other by the portions 9, and the bonding seal portion 9 preferably has a heat-bonding portion H6 between the inner surface of the first base material 91 and the outer surface of the second base material 92. The joint seal portion 9 is preferably provided along the fitting 8 as shown in FIG. The joint seal portion 9 may be a continuous linear shape as shown in FIG. 1 or an intermittent linear shape (not shown). Of these, the joint seal portion 9 is more preferably in a continuous linear shape as shown in FIG. 1 in that the space between the first base material 91 and the second base material 92 is closed. Further, since the joint seal portion 9 has a continuous linear shape as shown in FIG. 1, the space S2 surrounded by the heat-bonded portion H5 and the heat-bonded portion H6 of the joint seal portion 9 is also buffered in the same manner as the gas cell. The air can be sealed. Like the heat-bonded portion H1, the heat-bonded portion H6 is not bonded by laminating or the like, and the first base material 91 and the second base material 92 are directly fixed by heat bonding. Since the heat-bonded portion H6 increases the number of joints between the first base material 91 and the second base material 92, the deviation between the first base material 91 and the second base material 92 can be further suppressed.

FIG. 6 is a front view showing a modified example of the compartment seal portion. FIG. 1 shows a form in which the partition seal portions 7 are provided in a grid pattern as an example, but the present invention is not limited to this. The compartment seal portion 7 has, for example, a diagonal grid shape as shown in FIG. 6 (a), a circular shape as shown in FIG. 6 (b), and a horizontal line shape as shown in FIG. 6 (c). As shown in FIG. 6 (d), the form may have a large and small grid pattern. When the partition seal portion 7 has a circular shape as shown in FIG. 6 (b) and the joint seal portion 9 has a continuous linear shape as shown in FIG. 1, in addition to the space 10a inside the circle, the outside of the circle The space 10b of the above can also seal the buffering air in the same manner as the gas cell 10. As shown in FIG. 6C, by providing the compartment seal portion 7 in parallel with the flow direction (also referred to as the MD direction) of the base material during the production of the cushioning bag 1, air is sent into the gas cell 10 on the production line. Cheap. Further, as shown in FIG. 6D, by changing the density of forming the compartment seal portion 7, the gas cell 10 contains a small gas cell 10c having a relatively small amount of air and an amount of air contained therein. It may be in the form of having a relatively large number of atmospheric cells 10d. Thereby, a certain amount of air in the gas cell 10 can be provided, and the degree of buffering and heat retention can be adjusted.

The cushioning bag 1 according to the present embodiment preferably has a fitting 8. The fitting 8 can reseal the housing portion S1. The cushioning bag 1 according to the present embodiment has a form (first example) in which the fitting 8 is provided on the second base material 92 (that is, the body portion of the inner bag 3) as shown in FIG. As shown, the fitting 8 includes a form (second example) in which the fitting 8 is provided on the first base material 91 (that is, the body portion of the outer bag 2). Next, the buffer bag 1 of the first example will be described.

In the buffer bag 1 of the first example according to the present embodiment, as shown in FIGS. 1 and 2, the buffer bag 1 is a second unit in a state where the first base material 91 and the second base material 92 are overlapped with each other. The first side edge connecting the folded-back portion 4 with the material 92 inside and folded in half, the opening 5 provided on the edge facing the folded-back portion 4, and the folded-back portion 4 and the edge facing the folded-back portion 4. It has a sealing portion 6A and a second side edge sealing portion 6B facing the first side edge sealing portion 6A, and the second base material 92 is provided on the inner surface along the edge of the opening 5. The first side edge sealing portion 6A and the second side edge sealing portion 6B have a male-female occlusal type fitting 8, and as shown in FIG. 4, the first base material 91 and the second base material 92 Along the thickness direction T of the first base material 91, the heat-bonding portion H2 between the inner surface of the first base material 91 and the outer surface of the second base material 92, and the heat-bonding portion H3 between the inner surfaces of the second base material 92, It has a heat-bonded portion H4 between the outer surface of the second base material 92 and the inner surface of the first base material 91, and the first base material 91 and the second base material 92 are fitted as shown in FIG. The region R between the portion where the base of the fitting 8 is provided and the edge of the opening 5 has a heat-bonding portion H5 between the inner surface of the first base material 91 and the outer surface of the second base material 92. Is preferable.

In the buffer bag 1 of the first example, the male-female occlusal type fitting 8 is a female member 8A and a second member 8A projecting from one of the second base materials 92 facing each other in the opening 5, as shown in FIG. It has a male member 8B projecting from the other side of the base material 92. The female member 8A and the male member 8B may have a shape that engages with each other so as to be disengaged from each other. As an example in FIG. Although the cross-sectional shape of the member 8A into which the head of the member 8A fits is concave and hooks facing each other are provided at the tips on both sides thereof, the present invention is not limited to this. As shown in FIG. 2, the fitting 8 may be integrated with the second base material 92 or may be a separate body (not shown).

In the buffer bag 1 of the first example, FIG. 2 shows a form in which the edges of the two first base materials 91 and the edges of the two second base materials 92 forming the edges of the opening are at the same height as an example. However, the present invention is not limited to this, and a form in which the edges of the two first base materials 91 project from the edges of the two second base materials 92 on the side opposite to the folded-back portion 4 (not shown). A form in which the edges of the two second base materials 92 project from the edges of the two first base materials 91 on the side opposite to the folded-back portion 4 (not shown), or a first side with the opening 5 interposed therebetween. Even if the first base material 91 and the second base material 92 on the other side of the first base material 91 and the second base material 92 protrude from the side opposite to the folded-back portion 4 (not shown). Good.

As shown in FIG. 4, the first side edge sealing portion 6A and the second side edge sealing portion 6B are heat-bonded portions H2 along the thickness direction T of the first base material 91 and the second base material 92. , H3 and H4. In the present specification, "along the thickness direction T of the first base material 91 and the second base material 92" is a virtual same as extending in the thickness direction T of the first base material 91 and the second base material 92. It means that they are lined up in a straight line (not shown). Although FIG. 3 shows the first side edge sealing portion 6A as a representative, the second side edge sealing portion 6B also has the same structure as the first side edge sealing portion 6A. Like the heat-bonded parts H1, the heat-bonded portions H2 to H4 are not bonded by laminating or the like, and the first base material 91 and the second base material 92 are directly fixed by heat bonding. There is. The outer bag 2 and the inner bag 3 are integrally joined at the first side edge sealing portion 6A and the second side edge sealing portion 6B by the heat-bonding portions H2 to H4.

As shown in FIG. 5, the first base material 91 and the second base material 92 form the first base material 91 in the region R between the portion where the base portion of the fitting 8 is provided and the edge of the opening 5. It is preferable to have a heat-bonded portion H5 between the inner surface of the surface and the outer surface of the second base material 92. As shown in FIG. 5, the portion where the base portion of the fitting 8 is provided is the portion on the most folded portion 4 (shown in FIG. 2) side of the portions where the female member 8A projects from the second base material 92. Is. Like the heat-bonded portion H1, the heat-bonded portion H5 is not bonded by laminating or the like, and the first base material 91 and the second base material 92 are directly fixed by heat bonding. Since the first base material 91 and the second base material 92 are integrally joined at the edge of the opening 5 by the heat-bonding portion H5, the fitting 8 can be opened more easily.

FIG. 7 is a front view showing an example of a modification of the cushioning bag according to the present embodiment. FIG. 8 is a cross-sectional view taken along the line CC of FIG. In the cushioning bag 1 according to the present embodiment, as shown in FIGS. 7 and 8, the folded-back portion 4 is the first base material 91 along the thickness direction T of the first base material 91 and the second base material 92. The heat-bonding portion H7 between the inner surface of the second base material 92 and the outer surface of the second base material 92, the heat-bonding portion H8 between the inner surfaces of the second base material 92, and the outer surface of the second base material 92 and the first base material 91. It is preferable to have a heat-bonded portion H9 on the inner surface of the and. Like the heat-bonded parts H1, the heat-bonded portions H7 to H9 are not bonded by laminating or the like, and the first base material 91 and the second base material 92 are directly fixed by heat bonding. There is. The heat-bonded portions H7 to H9 can prevent the second base material 92 from floating inward of the bag at the folded-back portion 4.

FIG. 9 is a front view showing an example of a cushioning bag having an opening sealing portion. FIG. 10 is a cross-sectional view taken along the line DD of FIG. In the buffer bag 1 according to the present embodiment, as shown in FIGS. 9 and 10, the buffer bag 1 has an opening sealing portion 11 that seals the edge of the opening 5, and has a first side edge sealing. Either one or both of the stopper 6A and the second side edge sealing portion 6B has a notch 12 for opening in the region between the opening sealing portion 11 and the fitting 8, and the opening sealing portion 11 Along the thickness direction T of the first base material 91 and the second base material 92, is a heat-bonding portion H10 between the inner surface of the first base material 91 and the outer surface of the second base material 92, and the second base material 92. It is preferable to have a heat-bonding portion H11 between the inner surfaces of the material 92, and a heat-bonding portion H12 between the outer surface of the second base material 92 and the inner surface of the first base material 91.

The notch 12 is not particularly limited, and may be, for example, a V notch (shown in FIG. 7), an I notch (not shown), or damage processing by scratch processing (not shown). Further, as shown in FIG. 7, the notch 12 may be provided only in the first side edge sealing portion 6A, or may be provided only in the second side edge sealing portion 6B (not shown). ), It may be provided in both the first side edge sealing portion 6A and the second side edge sealing portion 6B (not shown). In the cushioning bag 1 shown in FIGS. 9 and 10, when the cushioning bag 1 is cut open from the notch 12 along the fitting 8, for example, an opening 5 is formed as shown in FIG. Like the heat-bonded portions H1, the heat-bonded portions H10 to H12 are not bonded by laminating or the like, and the first base material 91 and the second base material 92 are directly fixed by heat bonding. There is. By sealing the edge of the opening 5 with the opening sealing portion 11, the unopened state of the cushioning bag 1 can be ensured. In FIG. 10, the folded-back portion 4 is not provided with the heat-bonded portion, but as shown in FIG. 8, the folded-back portion 4 may be provided with the heat-bonded portions H7 to H9.

Next, the cushioning bag 1 of the second example will be described with reference to FIG. 11, but the cushioning bag 1 of the second example has a basic configuration except that the fitting 8 is provided on the first base material 91. Is the same as the buffer bag 1 of the first example. Therefore, the description of the common configuration will be omitted, and different configurations will be described. In the cushioning bag 1 of the second example according to the present embodiment, as shown in FIG. 11, the cushioning bag 1 has a second base material 92 in a state where the first base material 91 and the second base material 92 are overlapped with each other. A first side edge sealing portion that connects the folded-back portion 4 that has been folded in half, the opening 5 provided on the edge facing the folded-back portion 4, and the folded-back portion 4 and the edge facing the folded-back portion 4. The edges of the two first base materials 91 having the 6A and the second side edge sealing portion 6B facing the first side edge sealing portion 6A and forming the edge of the opening 5 are the two second. The first base material 91 is arranged so as to project from the edge of the base material 92 on the side opposite to the folded-back portion 4, and the first base material 91 is a portion of the portion that protrudes from the edge of the second base material 92 along the edge of the opening 5. A male-female occlusal type fitting 8 provided on the inner surface is provided, and the first side edge sealing portion 6A and the second side edge sealing portion 6B have the first base material 91 and the first base material 91 and the second side edge sealing portion 6B as shown in FIG. The heat between the heat-bonded portion H2 between the inner surface of the first base material 91 and the outer surface of the second base material 92 and the inner surface of the second base material 92 along the thickness direction T of the second base material 92. It is preferable to have an adhesive portion H3 and a thermal adhesive portion H4 between the outer surface of the second base material 92 and the inner surface of the first base material 91.

In the buffer bag 1 of the second example, the edges of the two first base materials 91 forming the edges of the opening 5 are arranged so as to project from the edges of the two second base materials 92 on the side opposite to the folded-back portion 4. The fitting 8 is provided on the inner surface of the protruding portion of the first base material 91. The buffer bag 1 of the second example preferably has a heat-bonding portion H13 between the edge of the second base material 92 and the first base material 91. The heat-bonding portion H13 can prevent the contents from entering between the first base material 91 and the second base material 92.

The method for producing the cushioning bag 1 according to the present embodiment is not particularly limited, but may be produced by, for example, the following method. Here, the manufacturing method will be described by taking the buffer bag 1 of the first example shown in FIGS. 1 to 5 as an example, but the buffer bag 1 of the second example can also be manufactured by the same method.

First, the strip-shaped first base material 91 and the strip-shaped second base material 92 are folded in half by stacking two sheets so that the second base material 92 is on the inside. The strip-shaped first base material 91 and the strip-shaped second base material 92 may be fed and supplied from the original rolls wound in a roll shape, respectively. Further, it is preferable that the fitting 8 is formed by integrally molding the raw fabric of the second base material 92 with the second base material 92 at the time of manufacturing. For example, according to inflation molding, the fitting 8 can be integrally molded with the second base material 92.

Next, in a state where the first base material 91 and the second base material 92 are folded in half and overlapped with each other, the side edge sealing portions extending in the direction intersecting in the longitudinal direction (first side edge sealing portion 6A and the second side). The edge sealing portion 6B is included) is formed by heat bonding at predetermined intervals.

After that, the partition seal portion 7 is formed by heat bonding in the region facing the accommodating portion with a seal bar or a mold having a predetermined shape. At this time, at the time of forming the compartment seal portion 7, the portion of the first base material 91 surrounded by the compartment seal portion 7 is sucked, or an air flow is generated from the raw fabric roll side of the first base material 91 and the second base material 92. You may let it. As a result, the amount of buffering air contained in the gas cell 10 can be increased.

The joint seal portion 9 is formed before the side edge sealing portions 6A and 6B are formed, after the side edge sealing portions 6A and 6B are formed, or formed at the same time when the partition seal portion 7 is formed. You may.

When the first base material 91 is natural paper and the second base material 92 is a thermoplastic resin film, when the heat-bonding portions H1 to H13 are provided, one side of the heat-bonded portion (upper side during bag making). ) May be heated with the seal bar, but depending on the thickness of the first base material 91 (natural paper), the seal bars are simultaneously placed on both sides (upper and lower sides during bag making) of the heat-bonded portion. You may heat with the seal bar from one side (upper side at the time of bag making) of the part to be heat-bonded, and then heat with the seal bar from the other side (lower side at the time of bag making). .. As a result, the thermoplastic resin of the second base material 92 can be more stably impregnated with the natural paper of the first base material 91.

1 Buffer bag 2 Outer bag 3 Inner bag 4 Folded part 5 Opening part 6A 1st side edge sealing part 6B 2nd side edge sealing part 7 Section sealing part 8 Fitting tool 8A Female member 8B Male member 9 Joint sealing part 10 Gas cell 10a Space inside the circle 10b Space outside the circle 10c Small gas cell 10d Large gas cell 11 Opening sealing part 12 Notch 91 First base material 92 Second base material H1 to H13 Thermal adhesion part R area S1 Storage part S2 Space T thickness direction

Claims (6)

In a buffer bag which is a double bag including an outer bag having a body made of a first base material and an inner bag having a body part made of a second base material and arranged inside the outer bag.
The cushioning bag is thermally bonded to an accommodating portion provided inside the inner bag, an inner surface of the first base material provided in a region facing the accommodating portion, and an outer surface of the second base material. With a compartment seal part having a part,
The partition sealing portion forms a plurality of gas cells between the first base material and the second base material, and each of the gas cells seals buffering air. bag. The cushioning bag is provided at a folded-back portion in which the first base material and the second base material are overlapped with each other and the second base material is turned inside and folded in half, and an edge facing the folded-back portion. It has a first side edge sealing portion that connects the folded portion and an edge facing the folded portion, and a second side edge sealing portion facing the first side edge sealing portion. And
The second substrate has a male-female occlusal fitting provided on the inner surface along the edge of the opening.
The first side edge sealing portion and the second side edge sealing portion are formed on the inner surface of the first base material and the second base material along the thickness direction of the first base material and the second base material. A heat-bonding portion with the outer surface of the base material, a heat-bonding portion between the inner surfaces of the second base material, and a heat-bonding portion between the outer surface of the second base material and the inner surface of the first base material. Have,
The first base material and the second base material are formed on the inner surface of the first base material and the second base material in a region between the portion where the base portion of the fitting is provided and the edge of the opening. The buffer bag according to claim 1, further comprising a heat-bonded portion with an outer surface of the material. The cushioning bag is provided at a folded-back portion in which the first base material and the second base material are overlapped with each other and the second base material is turned inside and folded in half, and an edge facing the folded-back portion. It has a first side edge sealing portion that connects the folded portion and an edge facing the folded portion, and a second side edge sealing portion facing the first side edge sealing portion. And
The edges of the two first base materials forming the edge of the opening are arranged so as to project from the edges of the two second base materials on the side opposite to the folded portion.
The first base material has a male-female occlusal type fitting provided on the inner surface of a portion protruding from the edge of the second base material along the edge of the opening.
The first side edge sealing portion and the second side edge sealing portion are formed on the inner surface of the first base material and the second base material along the thickness direction of the first base material and the second base material. A heat-bonding portion with the outer surface of the base material, a heat-bonding portion between the inner surfaces of the second base material, and a heat-bonding portion between the outer surface of the second base material and the inner surface of the first base material. The buffer bag according to claim 1, wherein the buffer bag comprises. The first base material and the second base material are joined to each other by a joint seal portion provided on the folded-back portion side of the fitting, and the joint seal portion is the first base material. The buffer bag according to claim 2 or 3, further comprising a heat-bonding portion between the inner surface and the outer surface of the second base material. The folded portion includes a heat-bonding portion between the inner surface of the first base material and the outer surface of the second base material along the thickness direction of the first base material and the second base material, and the first base material. Claims 2 to 4, wherein the two base materials have a heat-bonding portion between the inner surfaces of the base material and a heat-bonding portion on the inner surface of the outer surface of the second base material and the inner surface of the first base material. The buffer bag described in any one. The cushioning bag has an opening sealing portion that seals the edge of the opening, and has an opening sealing portion.
Either one or both of the first side edge sealing portion and the second side edge sealing portion has a notch for opening in the region between the opening sealing portion and the fitting.
The opening sealing portion includes a heat-bonding portion between the inner surface of the first base material and the outer surface of the second base material along the thickness direction of the first base material and the second base material. 2. The second aspect of the present invention is characterized by having a heat-bonding portion between the inner surfaces of the second base material, a heat-bonding portion between the outer surface of the second base material and the inner surface of the first base material. The buffer bag according to any one of ~ 5.

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