KR20150053113A - Package equipped with double air bag and packaging method thereof - Google Patents

Abstract

The present invention relates to a packaging bag having a double shock-absorbing structure with an internal shock-absorbing part and an external shock-absorbing part of a single air injection, and to a packaging method using the same, wherein the packaging bag to package an object to be packaged forms a double shock-absorbing structure capable of protecting an object to be packaged from an external shock, so as to prevent damage to the object to be packaged such that a package cannot be damaged even if the package is transported by a parcel service or the like; and a packaging operation can be conducted in a very simple manner since air is completely filled in the internal and external shock-absorbing parts even by a single air injection. To achieve the above purpose, the packaging bag having a double shock-absorbing structure with an internal shock-absorbing part and an external shock-absorbing part by a single air injection in accordance to the present invention comprises: an internal shock-absorbing part formed by mutually coupling a pair of base sheets, wherein an accommodation part to accommodate an object to be packaged is formed and air is filled therein; an external shock-absorbing part surrounding the internal shock-absorbing part having air filled therein; and an air injection part into which air is injected through an air inlet, wherein the air injection part is formed to communicate by passing both an air filling entrance of the internal shock-absorbing part and an air filling entrance of the external shock-absorbing part such that air can completely be filled in the internal shock-absorbing part and the external shock-absorbing part through the air injection part even by a single air injection.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag having a double buffer structure composed of an inner buffer part and an outer buffer part by a single air injection,

The present invention relates to a packaging bag for packaging a packaging object, in which a buffer structure capable of protecting a packaging object from external impact is double-structured so as to prevent damage to the packaging object, (2) consisting of an inner cushion part and an outer cushion part by a single air injection which can complete the air filling of the inner and outer cushion parts with a single air infusion and can perform the packing operation very easily. And a packing method using the packaging bag.

In packaged moving, courier, and valuables stores, packaging objects are packed with packaging materials or packaging containers having buffering functions to prevent fragile packaging objects from being damaged by external impacts.

Conventionally, as a packaging material having a buffering function, an air cap called a so-called twisting cap is typical. The air cap is a type in which a plurality of air cushions are closely provided on a plastic wrapper. However, since the air cushion part has a low durability, it is difficult to attain a cushioning function and excessive use is required for protecting a packaging object, It is not preferable from the view point of view.

Another typical packaging container having a buffer function is a packing container made of styrofoam. Since the packing container made of styrofoam needs to be manufactured separately in consideration of the shape or size of each packing object, The versatility is deteriorated and reuse is not possible like the air cap described above, so that it can not be a packaging container preferable from the viewpoint of environmental protection.

As a packaging material for solving the above problems, there is Korean public utility model 20-2009-0007962 (published on Aug. 5, 2009)

In the prior art, the first film material having a rectangular area as a vinyl material and the second film material corresponding to the first film material are brought into contact with each other, And an air inlet port for injecting air onto the first film material is formed in the tubular packaging member, the tubular packaging member being sealed with an injection expansion of continuous air so as to have an air flow passage in the tubular packaging member, And the check valve for expanding and maintaining the air bag by allowing the air to flow only in one direction of the continuous air bag,

The air injected into each air bag according to the infusion of air is influenced by the check valve installed on the inner side joint, so that even if any one air bag is broken while the air is once injected, It is possible to safely maintain and protect the packaging of the product. In addition, as the degree of expansion of the air bag, the product is packed in the space, To a tubular packaging member having a safety packaging function.

However, in the conventional art, since the cushioning structure through the air sac is formed only in the first place, when the air bag is broken, the package object can not be protected from external impact,

Particularly, when the package is packaged using the conventional technique, the package is easily damaged when the package is transported through a method such as courier service,

If transportation is still required, however, it is very troublesome and inconvenient because it requires additional box packing and the like.

In addition, since the packaging material can be easily damaged when the packaging material using the above-described conventional technology is used as an expensive article, it is necessary to pay extra attention to the transportation, and accordingly, the additional cost is required. There is a problem.

Accordingly, the present invention has been made to solve the above-mentioned problems,

A double buffer structure composed of an inner buffer part and an outer buffer part is introduced so as to ensure the protection of the package object and to prevent the package object from being damaged even during transportation such as courier service,

In addition, since the outer cushion unit replaces the function of the box, it is not necessary to perform additional box packing after packaging through the packing bag,

Furthermore, in order to complete the air filling of the inner and outer cushioning parts and to perform the packaging operation very easily with only one air infusion, even though both of the inner and outer cushioning parts are filled with air, And a single injection passage communicating with both the inner and outer cushioning portions is realized by using the double cushioning structure of the inner cushioning portion and the outer cushioning portion. And it is an object of the present invention to provide a packaging bag in which a double buffer structure is formed.

In addition, the present invention provides a packing bag further comprising a cover formed by elongating backing sheets on a single injection path connected to an outer cushioning part so as to complete packaging by sealing the filling port after receiving the package body in the receiving part The purpose is to provide.

When the air is filled in the internal space between the backing sheets constituting the cover when the filling port is closed through the cover, the airtight container may not be completely sealed. To prevent this, And to provide a packaging bag provided with a third fusing wire for preventing air filling into the inside thereof.

In the present invention, when a breakage such as a hole or a hole is formed in the backing sheet forming the cushioning portion, the length of the single infusion passage is controlled so that all the air inside the cushioning portion leaks to the outside, And a second fusing line in which the backing sheets are thermally adhered to each other in a direction orthogonal to the direction of the first fusing line, so that the cushioning parts are composed of a plurality of air columns.

Another object of the present invention is to provide a packing bag having a fourth fusing part for preventing air filling in a part of air pillar on both sides of the inner cushion part so that the air pillar of the cushion parts can be smoothly formed.

In order to assist folding of the cushioning parts during air filling so that the inner and outer cushioning parts of the packing bag having a double cushioning structure can be more closely attached to the package body to be filled with air, And a double buffer structure composed of an inner buffer part and an outer buffer part is formed by a single air injection having a fifth fused part formed therein.

Further, in order to prevent the air from being leaked to the outside after the air filling is completed, the inner sheet coated with the heat resistant member is arranged between the backing sheets to serve as an air supply valve, And a fourth fusing line is formed along the heat-resistant member to seal the inlet port of the receiving portion.

Further, according to the present invention, a packaging portion having a double buffer structure composed of inner and outer cushioning portions is used to form a housing portion in which a packaging object is accommodated so that packaging can be completed by only one air injection at the time of packaging, And an air injection unit surrounding the inner cushion unit and injecting air through an outer cushion unit and an air injection port filled with air,

Wherein the inner cushioning portion, the outer cushioning portion, and the air injecting portion are formed by overlapping a pair of backing sheets composed of the first backing sheet and the second backing sheet, (A) preparing a packing bag having a double buffer structure in which air filling of the inner cushioning portion and the outer cushioning portion is completed by a single injection passage communicating with all of the inner cushioning portion and the outer cushioning portion;

A step (B) of loading the packaging object into the receiving portion of the packaging bag and accommodating the packaging object; And

(C) completing the packaging by completing air filling of all of the cushioning parts through one air injection into the air inlet; The present invention has been made in view of the above problems, and it is an object of the present invention to provide a packaging method using a packing bag in which a double buffer structure composed of an inner buffer part and an outer buffer part is formed by a single air injection.

In addition, the present invention provides a method for sealing a packaging object, comprising the steps of closing a charging port of a receiving portion containing a packaging object, attaching a label, And a packaging method using a packing bag in which a double buffer structure composed of a buffer part is formed.

In order to achieve the above object, a packing bag in which a double buffer structure composed of an inner buffer part and an outer buffer part is formed by single air injection according to the present invention,

A pair of backing sheets are joined together,

An inner cushioning part forming a receiving part for receiving the package object and filled with air;

An outer cushioning portion surrounding the inner cushioning portion and filled with air; And

And an air injection unit for injecting air through the air inlet,

The air injection unit is formed to communicate with the air filling inlet of the internal cushion unit and the air filling inlet of the external cushion unit,

And the air filling of the inner cushioning part and the outer cushioning part is completed by only one air injection through the air injecting part.

Further, in the packaging bag according to the present invention, the outer cushion portion is connected to an extension portion formed by extending the backing sheets, and the extension portion functions as a lid which covers the inlet of the receiving portion.

In the packaging bag according to the present invention, a third fusing wire is formed at the connection portion between the outer cushioning portion and the cover so as to prevent the air filling the outer covers from filling the inside of the cover, .

Further, in the packaging bag according to the present invention, an inner sheet coated with a heat-resistant member functioning as an air supply valve is provided between the backing sheet, and the surface of the inner sheet on which the heat- A first fusing line is formed,

And a fourth fusing line for sealing the inlet of the receiving portion by thermally adhering the sheets along the heat resistant member after the article to be packed is received in the receiving portion is formed.

In the packaging bag according to the present invention, the cushioning portions are formed of a plurality of air columns by a second fusing line in which the backing sheets are thermally bonded to each other in a direction orthogonal to the longitudinal direction of the single injection path .

In the packing bag according to the present invention, the inner cushioning portion is provided with a fourth fusing portion for preventing air from being partially filled in the air columns located on both sides.

Further, in the packaging bag according to the present invention, the cushioning portions include a fifth fused portion in which a part of the backing sheets are thermally bonded to each other in the air column.

The packing method using the packing bag in which the double cushion structure composed of the inner cushion part and the outer cushion part is formed by the single air injection according to the present invention

A pair of backing sheets are joined together,

An inner cushioning portion forming an accommodating portion for accommodating the packaging object and filled with air,

An outer cushioning portion surrounding the inner cushioning portion and filled with air,

And an air injection unit into which air is injected through the air inlet,

(A) preparing a packing bag which is formed to communicate with the air filling inlet of the internal cushioning portion and the air filling inlet of the external cushioning portion through the air filling portion;

A step (B) of loading the packaging object into the receiving portion of the packaging bag and accommodating the packaging object; And

(C) completing the packaging by completing air filling of all of the cushioning parts through one air injection into the air injecting part; And a control unit.

In the packaging method using the packaging bag according to the present invention, after the step (B), the inlet of the receiving part is thermally adhered and sealed (B ').

In the packaging method using the packaging bag according to the present invention, the outer cushion of the packaging bag is connected to an extended portion formed by extending the backing sheets, and the extension portion is formed to function as a cover capable of covering the input port of the receiving portion,

And (B) covering the inlet with the lid and attaching the lid to the backing sheet of the outer cushioning unit.

Further, in the packaging method using the packaging bag according to the present invention, the label sheet is attached to the cover sheet or the back sheet of the outer cushion unit in the step (B).

The packing bag in which the double buffer structure composed of the inner buffer part and the outer buffer part is formed by the single air injection according to the present invention is composed of the inner buffer part and the outer buffer part 2 It is possible to more securely and surely guarantee the protection purpose of the package object,

Therefore, when the packaging object is packed with the packaging bag of the present invention, the outer packaging part can be used as a packaging box substitute, so that the package can be transported through ordinary transportation such as courier service without any additional cost.

In addition, since only the pair of backing sheets are used to form the air injection portions communicating with the cushioning portions as well as the inner and outer cushioning portions, the user can complete air filling of both the inner and outer cushioning portions by only one air injection It is very convenient.

In addition, since the packaging bag according to the present invention implements a double buffer structure using a pair of backing sheets, it is very easy to manufacture and the manufacturing cost can be reduced.

Further, the packaging bag according to the present invention can prevent the packaging object from being contaminated by foreign matter or the like by covering the receptacle by inserting a cover covering the charging port of the packaging object, and the cover can be prevented from being contaminated by the other constituent parts So that it is easy to manufacture and there is no cost to manufacture a separate cover.

Furthermore, the packaging bag according to the present invention introduces a third fusing wire for preventing air from being filled into the inside of the lid through the air injecting part, so that the lid is easily covered and is easy to attach.

In addition, since the packing bag according to the present invention is constituted by a plurality of air cylinders which are separately sealed and separated from each other, part of the cushioning portion is broken and the air flows out to the outside, It is possible to perform the buffering function and to more surely protect the package object.

In addition, the packing bag according to the present invention introduces a fifth fused portion for allowing a part of the backing sheets to mutually thermally adhere to the air column, so that the folded portions are not formed by the shape of the packing object, The problem of not being in close contact with the object is solved.

Furthermore, the packaging bag according to the present invention introduces a fourth fusing line capable of closing the charging port of the receiving portion, so that the receiving portion can be completely sealed.

The packaging method using the packing bag in which the double buffer structure composed of the inner cushion part and the outer cushion part is formed by the single air injection according to the present invention, Since the air filling of the external buffering portion can be completed, the packaging operation is very easy and convenient.

In addition, the packaging method using the packaging bag according to the present invention enables the container to be completely closed by receiving the packaging object in the accommodation portion,

By covering the inlet with the cover before air filling and attaching the label paper, it is possible to ensure the sufficient attachment area of the cover and the label paper to prevent the cover or the label from falling off during transportation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a packing bag in which a double buffer structure composed of an inner buffer portion and an outer buffer portion is formed by single air injection according to the present invention. FIG.
FIG. 2 is a cross-sectional view illustrating a packing bag in which a double buffer structure composed of an internal buffer and an external buffer is formed by a single air injection according to the present invention, when the air filling is completed.
FIGS. 3 to 9 illustrate a packing bag having a double buffer structure composed of an internal buffer and an external buffer by single air injection according to the present invention, and a packaging method using the same, FIG.
10 is a cross-sectional view taken along the line AA of FIG. 1 for explaining an air filling process in a packaging bag according to the present invention.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

 In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

In describing a packing bag having a double buffer structure composed of an inner buffer and an outer buffer by single air injection according to the present invention and a packaging method using the same, If the reference is specified with reference to Fig. 1, the direction in which the gravity acts is set to the lower side, and the upper, lower, left, and right sides are determined as shown.

In addition, in FIG. 2, the inner and outer sides are defined with the direction in which the package body is received in the accommodating portion as the inner side, and in particular, the inner and outer directions will be described with particular reference to the inner and outer cushioning portions, And unless otherwise specified in the claims, specify directions in accordance with this standard,

In the description of FIGS. 3 to 9, the upper, lower, left, and right are relatively changed in comparison with the other drawings, so that the left side, the one side, and the right side and the other side are used in combination with reference to the direction shown in the drawing.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a packing bag according to a first embodiment of the present invention; Fig. 2 is a perspective view showing a packing bag according to a first embodiment of the present invention; .

First, as shown in FIG. 1 to FIG. 10, a packing bag in which a double buffer structure composed of an inner buffer part and an outer buffer part is formed by single air injection according to the present invention,

A pair of backsheets 10 and 20 are coupled to each other,

An internal cushioning part (21) forming a receiving part (12) in which the packaging object (P) is accommodated and filled with air;

An external buffering part 25 surrounding the internal buffering part 21 and filled with air; And

And an air injection unit 22 through which air is injected through the air injection port 23.

The inner cushioning part (21), the outer cushioning part (25) and the air injection part (22)

A pair of backing sheets 10 and 20 composed of a first backing sheet 10 and a second backing sheet 20 are formed to overlap with each other.

3 to 5, the backsheets 10 and 20 are cut in a rectangular shape, and the inner cushioning portion 21, the outer cushioning portion 25, In order to form the pair of backing sheets 10 and 20,

(10A) (20A) in which a part of the sheets is cut in the longitudinal direction at the center of the lower end of the sheets.

At this time, one side of the backsheet 10 (20) is formed shorter than the other side on the basis of the incision 10A (20A), and the other backsheet has extended portions 10B and 20B, ) 20B is used as a lid (the lid will be described later in detail)

As shown in FIG. 3, it is preferable that the extension portions 10B and 20B are formed by cutting a part of one side of the cut-out portion (in the direction of the cushioning portion) for convenience of operation.

The backing sheets 10 and 20 prepared as described above are superimposed on each other and the edges are thermally bonded to each other so that the internal space between the backing sheets 10 and 20 is filled with air and filled with air, (22).

The inner sheet 30 is disposed between the backsheets 10 and 20 to serve as an air supply valve to be described later. The heat resistant member 31 is applied.

The inner sheet 30 is formed on the upper side of the backsheets 10 and 20 to form an air injection unit 22 described later, Spaced apart.

It is preferable that the heat resistant member 31 is formed in such a manner that the heat resistant ink having heat resistance is continuously applied.

The material of the backing sheets may be formed of a known vinyl used as a packaging bag,

More specifically, in order to prevent the passage of air into the receptacle,

All of the sheets may be made of nylon,

Or a PE material,

Or the backing sheet is composed of nylon and PE material, so that it is desirable to simultaneously attain the object of air-blocking, manufacturing convenience, and manufacturing cost reduction.

As shown in FIGS. 1, 4 and 5, a first fusing line 22a is formed in the combined body of the sheets along the longitudinal direction of the heat resistant member 31, and the first fusing line 22a The surface of the inner sheet 30 not coated with the heat resistant member 31 is thermally adhered to the second back sheet 20,

The surface to which the heat resistant member 31 is applied to the inner sheet 30 is not thermally adhered to the first back sheet 10.

It is preferable that the first fusing line 22a is formed by a known thermal fusing method in consideration of the material of the sheets, and it is preferable that other fusing lines and a fused portion described later are also formed in the same manner.

The edge fusing lines 27 are formed so that the sheets are mutually thermally adhered along the respective outsides (including the cut-outs 10A and 20A) formed on the backsheets 10 and 20, If the thermal bonding is performed between the inner sheet 20 and the inner sheet 30 (the portion where the heat resistant member 31 is not applied)

The base sheets 10 and 20 on one side (left side in the drawing) are utilized as an internal buffer 21 on the basis of the incision 10A (20A) (10) and (20) are utilized as an outer buffer part (25)

The space between the backing sheets 10 and 20 formed on the first fusing line 22a formed along the longitudinal direction of the heat resistant member 31 is a space for supplying air to the inner and outer cushioning parts 25 Can be utilized as the air injection unit 22,

More specifically,

First, in the state shown in Figs. 4 and 5, one side sheets of the incision 10A (20A) are folded in the upper longitudinal direction (the lower end of the folding portion is brought into contact with the position of the first fusing wire) A space formed between the assemblies of the facing backing sheets 10 and 20 forms a receiving portion 12 in which the packaging object P can be accommodated (see FIG. 1)

After part of the backing sheets forming the receiving portion 12 are folded in the other lateral direction with reference to the cut-outs 10A and 20A,

If the overlapping portions of one side backing sheet and the other backing sheet are folded again in the lower longitudinal direction with respect to the incision 10A (20A), and the left and right side edges are thermally adhered to each other, as shown in [A] Similarly, the outer cushioning portion 25 surrounding the inner cushioning portion 21 is formed.

At this time, the cut-outs 10A and 10B are formed to extend to a position close to the first fusing line, that is, to the lower portion of the air injection unit 22, or extend to a position in contact with the first fusing line 22a It is desirable to provide convenience in the folding process for the cushioning structure. In some cases, the cut-out may be formed only up to the longitudinal folding line (middle dashed line) shown in Figs.

Therefore, when the edge fusing line 27 is formed after the respective portions are sequentially folded in a state in which the pair of backing sheets 10 and 20 are divided left and right through the central incision 10A 20A,

The accommodating portion 12 in which the package object P is accommodated is formed on the innermost side by the backing sheet 10 so that the internal cushioning portion 21 is formed around the accommodating portion 12,

And the outer cushioning portion 25 is formed on the outermost side so as to surround the inner cushioning portion 21.

5 to 7, the air injection unit 22 is connected to both the one internal cushion unit 21 and the other external cushion unit 25,

The portion where the first fusing line 22a is formed by the heat resistant member 31 is in a state in which the inner sheet 30 and the first backing sheet 10 are not thermally adhered Lt; / RTI >

Since the air injection part and the buffer parts are in mutual communication,

A space in which the first backing sheet 10 and the inner sheet 30 are not thermally adhered to the connecting portion between the inner cushioning portion 21 and the air injecting portion 22 is formed as an inlet of the inner cushioning portion 21 for air filling Function,

The space in which the first backing sheet 10 and the inner sheet 30 are not thermally adhered to the connecting portion of the outer cushioning portion 25 and the air injecting portion 22 is formed by an inlet of the outer cushioning portion 25 for air filling Function.

Therefore, since the air injection unit 22 is not provided with another structure for mutually thermally bonding the backing sheets to the boundary between the outer cushion unit 25 and the inner cushion unit 21,

The air injecting portion 22 is composed of a single injection passage communicating with both the internal buffering portion 21 and the air filling inlet of the external buffering portion 25.

5) is formed only at one end of each side of the air injecting portion 22, more preferably at the end of the outer cushioning portion to seal the other side (right side in the figure) of the air injecting portion 22 And one end thereof is usable as an air inlet 23 communicating with the air injection part 22. [

In this case, it is preferable that the edge welding line 27A (see FIG. 5) is configured to close the other side of the air injection unit as shown in the figure, but disconnect the heat resistant member continuously applied through the sealing.

It is preferable that the edge weld portion 27A 'is also formed on the left edge portion of the air injection portion 22 formed in the cushioning portion 21 and the heat resistant member continuously applied through the seal is cut off as shown in the drawing Do.

3 to 6, the extension portions 10B and 20B formed on the right side of the incision 10A (20A) are used as a cover for covering the entrance of the packaging object P of the packaging bag formed through the above process.

That is, as shown in [B] of FIG. 2, the extension portion is attached to the backing sheet 10 (20) while being folded in the direction of the inlet port in a state of being connected to the outer cushioning portion, (12).

Therefore, if air is filled in the internal space between the extended portions 10B and 20B of the backsheets constituting the cover, the filling port can not be completely sealed due to the volume increase due to air filling,

In order to prevent this, as shown in FIGS. 5 to 7, the backing sheets are mutually thermally adhered to the connecting portions of the cover, i.e., the extension portions 10B and 20B of the backing sheets and the outer cushioning portion 25, A third fusing line 28 is formed to prevent the air to be injected from being filled into the inside of the lid.

Next, the present invention prevents the package object P from being damaged through the double buffer structure, so that the package body P can be protected even if the external buffer part 25 is broken, And functions as an external box for packing the internal cushioning part 21,

It is prone to breakage such as puncturing or tearing of a hole during transportation.

In addition, not only the outer cushion unit 25 but also the inner cushion unit 21 have a problem in that all of the cushion unit may lose the cushioning function if a small breakage occurs.

Therefore, the present invention solves the above-mentioned problems by constituting the buffer parts with a plurality of air columns 29 individually filled with air.

That is, the cushioning parts 21 and 25 are provided with a first welding line 22a formed along the heat-resistant member 31 in a direction orthogonal to the longitudinal direction of the air injection part 22, And a plurality of second fusing lines 20a formed in the direction of the first fusing parts 21 and 25 to thermally adhere the backing sheets of the buffer parts 21 and 25 to each other.

The upper end of the second fusing line 20a is connected to the first fusing line 22a or to a first fusing unit 33 described later.

Accordingly, since the plurality of air columns 29 are individually filled with air, even if a part of the air columns 29 is broken, the air filled in the other air columns 29 does not flow out to the outside. The units 21 and 25 can continue to perform the buffering function.

Further, as shown in [A] of FIG. 2, when the cushion parts are constituted by air columns,

The double buffer structure can be smoothly formed if the number of the air columns of the internal cushioning portion is less than the number of the air cylinder portions of the external cushioning portion.

Even if the inner and outer cushioning parts 21 and 25 are not constituted by the air cylinders 29, since the air filling is performed for the same area, the volume of the inner cushioning part should be smaller than the volume of the outer cushioning part, And can be smoothly formed.

Accordingly, the present invention is configured to include the ashed portion which is not filled with air on both sides of the internal cushioning portion 21, so that the number of air cushions of the internal cushioning portion 21 and the external cushioning portion 25 are differently formed .

As shown in FIG. 7, the airbag 29 of the internal cushioning portion 21 is provided with a fourth fused portion (not shown) 36 are formed so as to seal the air filling passageway, it is possible to prevent the air pillar on both sides of the internal cushioning portion from being filled with air.

In the case of a packing bag having no air column, the inner cushioning portion 21 forms one second fusing line 20a at both side edges thereof, and then the sheets are thermally fused in the lateral direction so that air is not injected into both sides of the inner cushioning portion A fourth fused portion 36 will be formed.

The fourth fused portion 36 can be formed not only in the state of FIG. 7 but also in the state of FIG. 5 (which is omitted in FIG. 5 for convenience of explanation) The function of the fourth fused portion for preventing the air pillar 29 from being filled with air and forming the non-flawed portion is not different from that according to the order of forming the fourth fused portion 36.

As shown in the enlarged upper part of FIG. 5, a second fusing line 20a is not formed on a part of both sides of the inner cushioning part 21, That is, in the state where the air column 29 is formed only in the inner cushioning portion 21, the fourth fused portion (the outer circumferential portion of the second fused portion 20a) 36 ') so as to form an asphalt portion on both sides of the internal cushioning portion.

At this time, when the cushioning portion 21 is a packing bag which is not composed of the air columns 29, only one second fusing line 20a is formed on both sides of the cushioning portion, and a fourth fusing portion 36 ').

The fourth fused portion 36 'may be formed on the lower side of the section where the heat resistant member is applied to heat seal all the sheets,

Or by forming the fourth fused portion 36 'in a region where the heat resistant member is applied, as in the method of forming the fused portion 27A', 27A ' It is not necessary to be limited to the specific method that all the sheets can be thermally adhered to each other while the heat-resistant member is cut through pressurization.

Therefore, the portion 37 where the air filling inlet is sealed through the fourth fused portion 36 'is not filled with air and the air pillar of the inner cushioning portion 21 and the outer cushioning portion 25 29) water (or the difference in the size of the cushioning portion where the air is filled).

Although not shown in the drawing, the present invention can realize the configuration of the non-replica portion by forming the incision reduction (10A) 10B so as to be biased toward one side of the sheets, that is, toward the internal buffer portion (21).

That is, after the width of the inner cushioning portion 21 is made smaller than the width of the outer cushioning portion 25, the folded portion is formed at the boundary, and the double cushioning structure is formed by folding in the longitudinal and lateral directions The left end portions 10C and 20C of the internal cushioning portion 21 are located inside without contacting the right end portions 10D and 20D of the external cushioning portion 25. At this time, When the sheets are thermally adhered to each other at both ends of the outer cushion unit 25, the right end portions of the inner cushion unit 21 are joined to each other at the right end portions 10D and 20D of the outer cushion unit 25 in a state in which the left end portions of the inner cushion unit 21 are not overlapped. (That is, the left end portion 10C and the right end portion 10D) of the internal cushioning portion 21 and the external cushioning portion 25 as shown in Fig. 1 (A) Since the spacing space is formed, when the air is injected, the inner and outer cushion parts naturally contact the inner and outer cushion parts due to the width difference (volume or number of air columns) The air filling of the standing air is completed and the function of the above-mentioned incomplete portion can be realized.

2, the shape of the receiving portion 12 is displaced according to the size or volume of the package body P when the package body P is accommodated in the accommodating portion 12, Therefore, the shape of the buffer parts 21 and 25 is also displaced according to the shape displacement of the receiving part 12. [

However, since the cushioning parts 21 and 25 are filled with air to have a cushioning function, the above-mentioned shape displacement can not be naturally generated due to the internal air pressure. This is because the cushioning parts 21 and 25, The internal cushioning portion 21 does not come into close contact with the package body P (meaning that the package body P is supported by the package body P as close as possible to the package body P,

Therefore, when the package is transported, the package object P may flow inside the accommodation portion 12, causing the package object P to be damaged or damaged.

The present invention is characterized in that the buffer parts (21) and (25) include a fifth fused portion (26) in which a part of the backing sheet is mutually thermally bonded for each air column (29).

4 and 5, a plurality of fifth fused portions 26 are formed in the portion of the air column 29 extending along the longitudinal direction to bond the backing sheets to each other,

Therefore, when the object P is accommodated in the space, the air is not filled in the portion where the fifth fused portion 26 is formed. Therefore, when the object P is accommodated, The air pillar 29 is folded naturally depending on the shape and size of the package object P and the cushioning portion (particularly the internal cushioning portion 21) is brought into close contact with the package object P as much as possible It is possible to prevent the flow of the package object P in the accommodation portion 12 by supporting the package object P. [

Since the fifth fused portion 26 is provided between the adjacent second fused wires 20a, the air pillar 29 is completely sealed upside down, that is, the fifth fused portion 26 is located between the adjacent second fused wires 20a. Since the back sheets are connected to the heat sinks 20a to heat seal the air filling passages,

The lateral width of the fifth fused portion 26 is preferably smaller than the width between the adjacent second fused wires 20a.

In addition, in the case of the longitudinal width of the fifth fused portion 26, the length of the packaged object P is estimated in accordance with the size of the packaged object P, that is, , ≪ / RTI >

This is also applied to the position of the fifth fused portion 26, and the size of the position may be changed according to the specification of the packed bag, and this can be sufficiently predicted if a person skilled in the art (hereinafter referred to as a person skilled in the art) Can be reproduced.

The fifth fused portion 26 may be formed in one or more than one according to the packing bag standard. In the figure, the fifth fused portion 26 is provided at a predetermined position on the upper and lower sides of the air pillar 29 of the completed packing bag. It is possible to confirm that it is formed,

The right interpretation of the present invention should not be limited by the size, position and number of the fifth fused portion 26 shown in the figure.

Next, the opening and closing of the air filling opening of the buffer parts 21 and 25 through the inner sheet 30 will be described.

For convenience of explanation, the function of the air supply valve constituted by the inner seat 30 as a representative of the inner shock absorber 21 will be described, and it is to be noted that the same applies to the outer shock absorber 25 as well.

In order to prevent air leakage after air supply from the air injecting portion 22 to the internal cushioning portion 21 and completion of filling, the first backing sheet 10, the second backing sheet 20, The sheets 30 overlap each other to form an air supply valve for opening and closing the supply and the outflow of the air,

1, 4, and 10, the air supply valve includes a first heat-sealing member for thermally adhering the inner sheet 30 and the second backsheet 20 along the heat-resistant member 31, And a plurality of first fused portions 33 arranged along the longitudinal direction of the first fused wire 22a and wider than an application width of the heat resistant member 31. [

The inner sheet 30 and the first backing sheet 10 are not thermally adhered to each other due to the heat resistant member 31 when the first fusing line 22a is formed and the inner sheet 30, Only the sheet 20 is thermally adhered to form a pressure passage 31A between the inner sheet 30 and the second back sheet 20. [ The pressurizing passage 31A will be described later in detail.

Since the first fused portion 33 overlaps the first fused wire 22a with the application width of the heat resistant member 31 and is thermally fused to the first fused portion 33, The inner sheet 30 and the second backing sheet 20 are mutually thermally bonded to each other and the upper part and the lower part of the first fused portion 33 are bonded to the first The first fusing line 22a and the first fusing line 22a are interposed between the first fused portions 33 adjacent to each other while the backing sheet 10 and both the second backing sheet 20 and the inner sheet 30 are thermally bonded, The passageway in which the inner sheet 30 thermally adhered to the second back sheet 20 by the fused portion 33 is formed apart from the first back sheet 10 is communicated with the air injection portion 22 And serves as the first passage 33A.

Therefore, since the first fused portion 33 is formed to be wider than the width in which the heat resistant member is applied in the up and down direction (direction perpendicular to the longitudinal direction coated with the heat resistant member) The upper portion of the first fused portion 33 is bonded to the first backing sheet 10 and the second backing sheet 20 while being thermally bonded to each other, An inlet of an air supply valve (hereinafter collectively referred to as a first supply portion 33a) in which the first backing sheet 10 and the second backing sheet 20 are not thermally adhered is provided between the upper portion of the fused portion 33 And an intermediate portion of the first fused portion 33 is formed in such a manner that the second backing sheet 20 and the inner sheet 30 and the first backing sheet 10 are thermally bonded to each other, A second supply part 33b connected to the first supply part 33a is formed between the intermediate part of the first fusing sheet 33 and a lower part of the first fusing part 33 is formed between the first backsheet 1 0) and the second backing sheet 20 are thermally bonded to each other and a third supply part 33c connected to the second supply part 33b is formed between the lower part of the neighboring first fused part 33. [

Hereinafter, the configuration through the first fused portion 33 will be referred to as a first to a third supply portion. As described above, the first passage 33A formed between the adjacent first fused portions 33, And air is not directly supplied through the first fused portion 33.

The first supply part 33a of the present invention has a function of guiding the air injected into the air injection part 22 to the internal buffer part 21. [ The air injected into the air injecting portion 22 opens the first passage 33A formed between the inner sheet 30 and the first backing sheet 10 (the first supplying portion 33a) The air filling into the air filling section proceeds via the first passage 33A.

1 and 4, the present invention includes a second fused portion 34 connected to the first fused portion 33, and the second fused portion 34 includes the second fused portion 34, The passageway formed by mutually thermally adhering only one back sheet 10 and a part of the inner sheet 30 and formed between adjacent second fused portions (i.e., non-fused portions) is formed by the first passageway 33A And serves as a second passage 34A.

The present invention further includes a third fused portion 35 spaced apart from the second fused portion 34 and the third fused portion 35 is formed by the first back sheet 10 and the inner A portion of the sheet 30 is thermally adhered to each other to form a passage formed between the neighboring third fused portions 35 (i.e., the portion not fused) by a third passage 35A connected to the second passage 34A ).

That is, the second fused portion 34 is connected to the first fused portion 33 so that the inner sheet 30 and the first back sheet 10 The second fused portion 34 is formed to have the same or similar width as that of the first fused portion 33 and is provided between the adjacent second fused portions 34. [ (34A) is formed to smoothly supply air to the internal cushioning part (21) and to function as an air supply valve, thereby preventing air leakage through double sealing.

In the drawings of the present specification, the second fused portion is formed to overlap with the first fused portion 33, and is formed in a shape similar to an ∩ 'shape in consideration of convenience of manufacture and expansion and contraction during air filling, The second fused portion can be modified into any form capable of performing the above-described functions.

The third fused portion 35 is formed on the lower extension of the second passage 34A and the third fused portion 35 is also formed on the inner sheet 30 and a part of the first back sheet 10 A third passage 35A communicating with the second passage is formed between the neighboring third fused portions 35 and air is filled in the pressure passage too fast so that the inner sheet 30 is filled with air, And a bypass fused portion for preventing the air filling inlet from closing early.

To this end, it is possible to identify a third fused portion formed in a shape similar to an '↑' character in the drawings of the present specification, and this can be modified into any form capable of performing the above-described functions.

Hereinafter, the air filling process of the cushioning packing bag according to the present invention will be described in detail with reference to an enlarged view of FIG. 1 and FIG. 10.

10 is a longitudinal sectional view of the main part of A-A shown in Fig. In FIG. 10, the first fused portion 33, the second fused portion 34, and the third fused portion 35 are shown as spaced apart from each other. However, the longitudinal cross- It is to be understood that the appended drawings are not necessarily drawn to scale, and the reference numerals are for convenience of description.

The inflated air is introduced into the first passage 33A, that is, the heat-resistant member 31 located between the first fused portions 33, The first supply part 33a between the first backsheet 10 and the inner sheet 30 which are not thermally adhered to each other is opened and supply to the inner buffer part 21 is performed.

The supplied air flows into the second passage (34A) and the third passage (35A) after passing through the second supply part (33b) and the third supply part (33c).

The air passed through the first to third passages 33A, 34A, 35A expands the internal cushioning portion 21.

Then, the air whose pressure rises due to expansion of the internal cushioning unit (21) seals the air supply valve to prevent air leakage of the internal cushioning unit (21).

That is, when the air to be filled reaches a certain pressure, the expansion of the internal cushioning portion 21 stops, and the second fusing sheet 22 and the inner sheet 20 are separated by the first fusing line 22a. The first to third passages 33A are formed by pressing the inner sheet 30 toward the first back sheet 10 while expanding the pressurizing passages 31A formed by thermally adhering the inner sheet 30 to the first back sheet 10, (34A) (35A) is closed to prevent leakage of the filled air, so that the inner sheet (30) functions as an air supply valve.

The function of the air supply valve is equally applied to the external buffer.

The present invention can prevent the object to be packed in the receiving portion 12 from being contaminated by an external factor by closing the inlet 11 of the receiving portion 12 after the object to be packed is received in the receiving portion 12 .

The sealing of the charging port 11 may be realized by an adhesive tape or the like. However, the present invention is not limited to the above-

After the object to be packed is received in the receiving portion 12, a fourth fusing line 22b is formed along the heat-resistant member by a heat fusion method to form a gap between the surface of the inner sheet and the first backing sheet, All the sheets except for the filling inlet can be thermally adhered to each other to seal the inlet 11 completely.

1, since the fourth fusing line 22b is shown as being formed overlapping with the first fusing line 22a in the section where the heat resistant member 31 is applied, The first and second fusing lines 22a and 22b are indicated by the reference numerals,

Fig. 5 shows a state before the packaging bag is fabricated. Unlike Fig. 1, only the reference numerals of the first fusing line 22a are shown before the fourth fusing line is formed.

Since the present invention comprises the inner sheet coated with the heat resistant member, the air filling inlet is not sealed even when the portion coated with the heat resistant member is thermally adhered. Therefore, after the package body is received in the receiving portion 12, A line 22b can be formed to seal the charging port 11.

Next, the manufacturing process of the packaging bag according to the present invention will be described with reference to FIGS. 3 to 9. (Configuration not shown in the drawing is shown in FIG. 2)

First, as shown in FIG. 3, a pair of backing sheet 10 (20) in the form of a rectangle is prepared for producing a packaging bag according to the present invention.

Then, a central portion of the pair of backing sheets 10 and 20 is cut to form a cutout 10A and 20A, and then a cutout is cut at one side with reference to the cutouts 10A and 20A. 10A (20A) are formed on the other side.

Next, as shown in FIGS. 4 to 6, the inner sheet 30, on which the heat resistant member 31 is applied on the first backing sheet 10 of the pair of backing sheets 10 and 20, Are arranged at positions spaced apart from each other at an upper end of the sheet 10,

The second fused portion 34 and the third fused portion 35 are formed so that the inner sheet 30 and the first backing sheet 10 are thermally bonded.

The first and second fusing lines 22a, 20a and 28 and the first fused portion 33 are formed by arranging the second backing sheet 20 in contact with the first and second backing sheets 20, The air cylinders 29 constituting the inner and outer cushioning parts 25 and 25 and the air injecting part 22 constituting the single injection path and the extension parts 10B and 20B constituted of the lid, Respectively.

The heat resistant member 31 is applied in a direction in contact with the first backing sheet 10 so that the inner sheet 30 and the first backing sheet 10 can be formed even when the first fusing line 22a is formed, Is not thermally adhered.

And the edge fusing line 27 is formed along the rims of the pair of backing sheets 10 and 20 and the inner sheet 30 to seal the inner space between the sheets for the first time.

At this time, as shown in FIG. 5, any one of the side edges of the air injecting portion 22 is not sealed to form the air inlet 23,

It is preferable to use the air injection port 23 so that both side edges of the air injection port 22 in the direction of the inner cushioning part 21 are not sealed so that the edge of the air injection part 22 in the direction of the outer cushioning part 25, (27A ') and (27A) for sealing only the outer periphery of the frame.

Or an edge fusing line 27 for closing the upper end portion of the air injection unit 22 where the first fusing line 22a is located, (Which is formed continuously with deformed edge welding lines 27 of the shape) are formed and closed,

The other edge fusing line 27 can be formed after finishing the process described later, and will be described later in detail. (In this case, the edge fusing part 27A ') 27A are separately formed and sealed.

5, a fourth fused portion 36 'is formed on both side portions 37 of the inner cushioning portion where the air column 29 is not formed, It is possible to form the asymptotic portion on both sides of the inner buffer portion 21 as described above.

7, after the upper end of the air injection unit 22 is thermally bonded, the left joint body is folded in the upper longitudinal direction on the basis of the incision 10A (20A), and then, It is also possible to improve the operability in the finishing process). However,

The fourth fused portion 36 is formed on the air column of a part of both the air columns formed in the folded portion so that the sheets are all thermally adhered to each other (the fourth fused portion 36 can be formed has exist),

The air filling passage of some of the air columns located at both side portions of the cushioning portion is sealed to form an unchecked portion so that the number of air cylinders of the external cushioning portion surrounding the internal cushioning portion through the process described later is different from that of the internal cushioning portion So as to ensure smooth air column formation.

The fourth fused portion 36 is preferably formed under the first fused wire.

Next, as shown in Figs. 8 and 9, the folded portion is folded in the right-lateral direction with respect to the extended line of the incision 10A (20A)

The packed body P accommodating portion 12, the internal buffering portion 21, and the external buffering portion 25 are folded by only the pair of backing sheets 10 and 20, An air injection unit 22 for injecting air into the cushion units 21 and 25 is formed to communicate with all of the cushion units 21 and 25.

At this time, it is preferable that the edge fusing line 27 thermally adhered along the air injecting portion 22 is folded to be positioned on the same line as the third fusing line 28.

Next, in the state of FIG. 9, since the inner and outer cushioning parts 21 and 25 are not thermally adhered to each other at both sides (that is, they form a fusing line for sealing both ends during the above- When you did not)

As shown in FIG. 1, edge fusing lines 27 are formed on both side edges to allow four overlapping background sheets to be thermally bonded to each other.

As shown in FIG. 1, it is preferable that the opposite edge fusing lines 27 of the packing bag are formed to overlap with the first fusing line 22a,

At this time, the edge fusing lines on both sides of the packing bag are formed only from the folded portion up to the application region of the heat resistant member 31 (see the enlarged image on the upper side)

(I.e., the backing sheet including the extension portion (cover) formed on the upper side of the heat resistant member) of the outer cushioning portion where the air injection portion is not formed is folded in the opposite direction of the inlet port 12, Is formed in the region to which the heat resistant member 31 is applied, the backing sheets of the folded portions are thermally adhered to each other to form a closed space.

Accordingly, the four sheets of the backing sheets forming the both side edges of the backing sheets are thermally adhered at the same time through the last two side edge fusing lines 27 to seal the space between the sheets, that is, the inside and outside buffering parts 25 and 25 So that it is not necessary to perform the two-sided edge welding process among the other processes described above, thereby facilitating the work.

When air is injected through the unfused air injecting section 22, air filling is performed to the filling inlet of the inner and outer cushioning parts 25 and 25, and a constant pressure When the above air is filled, the above-described air supply valve operates to complete air filling.

Therefore, the present invention can be manufactured by using only a pair of backing sheets, so that the manufacturing process is very simple, and even when only a single air is injected, the inner and outer cushioning parts 25 (25 ) Can be filled in the air, so that the packaging can be performed very easily and conveniently.

Next, a packing method using a packing bag in which a double buffer structure composed of an inner buffer part and an outer buffer part is formed by single air injection according to the present invention will be described.

The packaging method of the present invention is a packing bag manufactured through the above process,

That is, a pair of backsheets 10 and 20 are coupled to each other,

An internal cushioning part 21 forming a receiving part 12 in which the packaging object P is accommodated and filled with air,

An outer cushioning portion 25 surrounding the inner cushioning portion 21 and filled with air,

And an air injection unit (22) for injecting air through the air inlet (23)

(A) preparing the packing bag to communicate with the air filling part (22) through the air filling inlet of the internal cushioning part (21) and the air filling inlet of the external cushioning part (25).

(B) loading and accommodating the package body (P) in the receiving portion (12) of the packaging bag; And

(C) completing the packaging by completing air filling of all of the cushioning parts (21) and (25) through the air injecting part (22) by one air injection; .

In the packaging bag in the step (A), an inner sheet coated with a heat-resistant member is arranged between the backing sheets to function as an air supply valve.

According to the present invention, after the step (B), a part of the outer cushioning part (a part in which the air injection part is not formed) is folded in a direction opposite to the feeding port and then the sheets in the section to which the heat- (B ').

The packing bag prepared in the step (A) is connected to an extension part formed by extending the backing sheets to the outer cushioning part 25, so that the extension parts 10B and 20B of the backing sheets are connected to the receiving part 12, It is possible to function as a lid which can cover the inlet port of the washing machine,

After the step (C), the packaging object P can be covered with the cover by using the cover, and then the one end of the cover can be attached to the backing sheets to complete the packaging.

Since the backing sheets 10 and 20, more specifically the backing sheet of the outer cushioning unit 25, are structured such that the air pillar 29 is formed and the attachment surface is difficult to secure, the cover can not be completely attached,

Wherein the filling port is covered with the cover before the air filling is performed in the step (C), one end of the cover is completely attached to the flat background sheet,

When the air filling process of the step (C) is performed, air lance 29 is formed on the base sheet on which the lid is closely attached, and the lid is also deformed in the same shape as the air pillar 29, Sufficient adhesion force can be secured.

Since the outer cushioning unit 25 of the present invention has a function as a general outer packaging box, not only the process of attaching the lid is performed before the step (C)

It is more preferable to carry out the air filling through the step (C) after attaching the label sheet on which the transportation information or the package object P information can be recorded to the flat background sheet, as in the case of ordinary transportation such as courier service Do.

The label paper may be attached to the outer cushioning portion 25 or the cover or both.

As described above, in the description of the present invention, the first backing sheet and the second backing sheet are a relative concept, and when the above-described folding process is reversed (or the inner sheet is coated with the heat-resistant member in reverse) The detailed structure including the positions of the first and second backsheets shown in Fig. 2 can be reversed, so that the right interpretation of the present invention should not be limited.

In the description of the present invention, referring to the accompanying drawings, a packing bag in which a double shock absorbing structure composed of an inner shock absorber and an outer shock absorber is formed by a single air injection having a specific shape and structure, It should be understood that the present invention can be variously modified, changed and substituted by those skilled in the art, and such modifications, changes and substitutions are to be construed as falling within the scope of protection of the present invention.

10: first backing sheet 10A: extension of first backing sheet
10B: reduction of the first backing sheet 11:
12:
20: second backing sheet 20A: extension of the second backing sheet
20B: folding of the second backing sheet 20a: second fusing line
21: internal buffering part 22: air injection part
23: air inlet 25: external buffer
26: fifth fused portion 27: edge fused wire
28: third fusing line 29: air pole
30: inner sheet 31: heat-resistant member
33: first fused portion 34: second fused portion
35: third fused portion 36: fourth fused portion

Claims (4)

A pair of backing sheets having an incision partially cut in the longitudinal direction from the center of the lower end are coupled to each other,
An inner cushioning portion in which a receiving portion for receiving a packaging object is formed between the assemblies of facing backing sheets in a state in which the one side sheets of the cut-away portion is folded in an upper longitudinal direction and air is filled between the backing sheets;
An outer cushioning portion surrounding the inner cushioning portion in a state where the overlapped portions are folded back in the lower longitudinal direction after the sheets of the inner cushioning portion are folded in the other transverse direction and air is filled between the backing sheets; And
And an air injection unit for injecting air through the air inlet,
The air injection unit is formed to communicate with the air filling inlet of the internal cushion unit and the air filling inlet of the external cushion unit,
And the air filling of the inner cushioning portion and the outer cushioning portion is completed by only one air infusion through the air injecting portion. [5] The double cushioning device according to claim 1, A packaging bag in which the structure is formed. The method according to claim 1,
A first fusing line for bonding the surface of the inner sheet not coated with the heat resistant member and the backing sheet is formed along the heat resistant member Wherein a double buffer structure composed of an inner buffer part and an outer buffer part is formed by a single air injection. The method according to claim 1,
Wherein the folded sheet is formed so as to extend from a lower end portion of the sheets to a lower portion of the air injection portion, wherein the double air infiltration structure is formed by a single air infusion and comprises an inner cushion portion and an outer cushion portion back. The method according to claim 1,
And the width of the inner cushioning portion is formed to be smaller than the width of the outer cushioning portion. The method of claim 1, wherein the inner cushioning portion and the outer cushioning portion Packing bag having a double-cushion structure constituted by parts.

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