KR102465593B1 - Packing box using air bag and manufacturing method of the same - Google Patents

Abstract

The present invention relates to a cushioning packaging material for corner protection and a method for manufacturing the same, which can protect the article by being inserted into one end of the article, but more firmly and safely with a double buffer structure for the edge of the article, In the cushioning packaging material for edge protection using a packaging bag in which air columns are arranged in a transverse direction by the bottom portion; first side wall portions bent upward at each of the front and rear ends of the air columns forming the bottom portion and standing upright in the vertical direction; second side wall portions bent inwardly at one end or both ends of the air columns forming the first side wall portion in a transverse direction, and standing upright in a vertical direction; A reinforcing part bent inward at the lower end of the air columns forming the second side wall part in the longitudinal direction and inserted overlappingly into the bottom part and connected in the horizontal direction; including, the other side surface and the upper surface of the cushioning packaging material or the cushioning part It is characterized in that it has an article fitting part in which the upper surface of the packaging material is opened, and a double buffer structure for edge protection in which the reinforcing part and the bottom part are overlapped.

Description

Buffer packaging material for corner protection and manufacturing method thereof {PACKING BOX USING AIR BAG AND MANUFACTURING METHOD OF THE SAME}

The present invention relates to a cushioning packaging material for corner protection and a method for manufacturing the same, which protects an article by being inserted into one end of the article, but which can more firmly and safely protect the corner of the article with a double buffer structure.

In general, packaging of various products is carried out in a box made of paper material, etc. At this time, in order to prevent the product from being damaged or damaged due to shaking or shock occurring during shipping, an air cap commonly called bubble wrap is used. The product is wrapped and packaged.

In this air cap, a plurality of air embossings are formed in detail on the plastic wrapper, but the durability of the embossing is weak and it is difficult to achieve a buffering function. Therefore, excessive use is required to protect the product, which is not only inconvenient when removing the wrapper, but also trash. There are a lot of problems that come out.

On the other hand, there is a buffer packaging bag made of a plurality of air columns that can replace the air cap.

The buffer packaging bag is a multi-row arrangement of air columns of a certain length to wrap and protect one side of an article, and has an advantage in that the air columns have a superior buffering function compared to air caps.

However, the buffer packaging bag has a problem in that it is difficult to mainly protect the corner of the article by folding it into a specific shape, particularly a box shape, due to the air column.

That is, in order to increase the safety of product protection, air columns must completely cover the outer surface of the product, especially the corner, but the buffer packaging bag has a problem in that the air columns are not well folded due to internal air pressure.

Accordingly, technologies have been developed that can be used by folding a buffer packaging bag having air columns into a box shape, such as in Patent Publication No. 10-2008-0086990 and Publication Patent Publication No. 10-2017-0100471.

As in the above published patents, a box using a conventional cushioning packaging bag has a single air column structure and has a poor buffering function, and in particular, there is a limit in that protection for the edge of an article easily subjected to load and impact is not safely guaranteed.

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

Buffer packaging material for corner protection that is easy and convenient to manufacture while preventing damage to the product, especially the corner, caused by impact by covering some or all of the 5 edges or part of the 4 sides of the corner with a packaging material with a double buffering function, and a method for manufacturing the same is intended to provide

In order to achieve the above object, the cushioning packaging material for corner protection according to the present invention,

In the cushioning packaging material for corner protection using a packaging bag in which air columns are arranged in the transverse direction by longitudinal fusion lines,

bottom part;

first side wall portions bent upward at each of the front and rear ends of the air columns forming the bottom portion and standing upright in the vertical direction;

second side wall portions bent inwardly at one end or both ends of the air columns forming the first side wall portion in a transverse direction, and standing upright in a vertical direction;

Including, a reinforcing portion bent inwardly at the lower end of the air columns forming the second sidewall portion in the longitudinal direction and inserted into the bottom portion to overlap and connected in the horizontal direction,

It is characterized in that it has a product fitting part in which the other side and top surface of the cushioning packaging material or the top surface of the cushioning packaging material is opened, and a double buffering structure for edge protection in which the reinforcing portion and the bottom portion overlap.

And in the cushioning packaging material for corner protection according to the present invention,

At each corner between the bottom part and the first side wall part and the second side wall part and the reinforcing part, sheets are fused at a predetermined interval in the transverse direction at a predetermined position of the interruption of the fusion lines to form a communication part of each air column. It is characterized in that the fusion part is provided.

In addition, the manufacturing method of the cushioning packaging material for corner protection according to the present invention,

In the manufacturing method of a buffer packaging material for edge protection using a packaging bag in which air columns are arranged in the transverse direction by longitudinal fusion lines,

a) After folding the packaging bag in the transverse direction, one end of the folded packaging bag is fused in the longitudinal direction, or the bottom portion of the lower edge of the folded packaging bag is fused in the transverse direction, or all of them are fused step;

b) cutting a part corresponding to the inner end of the reinforcing part among the fusion lines of the packaging bag in the longitudinal direction;

c) opening the overlapping first sidewall portion to pin the bottom portion, the second sidewall portion, and the reinforcing portion, and then inserting and folding the reinforcing portion into the bottom portion so as to overlap the bottom portion;

d) Before or after the step c), air is injected into the packaging bag to expand the air columns, so that the other side and top surface of the cushioning packaging material or the upper surface of the cushioning packaging material are opened, and the product fitting portion is opened, and the reinforcement It is characterized by including; forming a double buffer structure for edge protection in which the portion and the bottom portion overlap.

In addition, in the manufacturing method of the cushioning packaging material for edge protection according to the present invention,

In step a), before folding the packaging bag, parts corresponding to the corners between the bottom part and the first side wall part and between the second side wall part and the reinforcing part are fused at a predetermined distance apart in the transverse direction, and the fusion is performed. It is characterized by including a process of forming a communicating part of each air column between the parts.

A buffer packaging material for edge protection and a manufacturing method thereof according to the present invention,

Protection of the article, especially the corner of the article, by covering the entirety or part of the 5 corners of the article or all 4 sides around the corner, and having a double buffer structure for the bottom corner of the article. safety is excellent,

Not only can it be easily manufactured using a conventional buffer packaging bag, but also it is very convenient to use because items can be easily put in and taken out.

1 is a cross-sectional view of first and second embodiments according to the present invention;
2 to 4 are sample photos of a first embodiment according to the present invention.
5 to 7 are front views of packaging bags for explaining the manufacturing method of the first embodiment according to the present invention.
8 is a perspective view for explaining a packaging bag used in the present invention.

Since the present invention can have various changes and various forms, the implementation examples (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference numeral, in particular, the same number of tens and ones digits, or the same reference numerals having the same tens digit, ones digit, and alphabet indicate members having the same or similar functions, and unless otherwise specified, each of the drawings Members indicated by reference numerals may be understood as members conforming to these standards.

In addition, the components in each drawing are expressed in exaggeratedly large (or thick) small (or thin) or simplified expressions in size or thickness in consideration of convenience of understanding, etc., but the scope of protection of the present invention is thereby limited. It shouldn't be.

Terms used in this specification are only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as ~comprising~ or ~consisting of are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, 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 the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

~First~, ~Second~, etc. described in this specification will only be referred to to distinguish different components from each other, regardless of the manufacturing order, and the names in the detailed description and claims of the invention may not match.

In describing the cushioning packaging material for corner protection and its manufacturing method according to the present invention, if a non-rigid approximate direction standard is specified with reference to FIGS. 3 and 7 for convenience, the direction in which gravity acts is viewed downward The top, bottom, left and right are determined as they are, and the directions are specified and described according to this standard unless otherwise specified in the detailed description and claims of the invention related to other drawings.

Hereinafter, a cushioning packaging material for corner protection and a manufacturing method thereof according to the present invention will be described with reference to the accompanying drawings.

The present invention relates to a buffer packaging material for corner protection using a packaging bag in which air columns are arranged in the transverse direction by longitudinal fusion lines and a method for manufacturing the same, which is formed of air columns into which air is injected as shown in FIG. One of the side faces and/or the top face is folded into an open box shape to protect an article inserted into the article fitting portion, in particular a corner bottom portion of the article.

First, the packaging bag used in the present invention is one in which the air columns C are simultaneously filled with air and inflated through one-time air injection, and various types of known packaging bags may be used.

In this specification, Patent Registration No. 10-0947501 (March 8, 2010), Patent Registration No. 10-1279167 (June 20, 2013), Patent Registration No. 10-1084301 (November 10, 2011), etc. Representatively shown is a packaging bag 10 in which a valve for preventing air leakage is interposed between first and second sheets 11 and 12 after air is injected using the inner sheet 13 to which the member 13a is applied. has been

As shown in FIG. 8, the packaging bag 10 overlaps the first sheet 11 and the second sheet 12 with the inner sheet 13 coated with the heat-resistant member 13a interposed therebetween, and then the top, bottom, left and right edges. When the lines 14a, 14b, and 14c (the fusion lines C1 at both ends of the left and right sides replace the left and right edge lines 14b) and the fusion lines C1 are thermally bonded, in the vertical direction (longitudinal direction) ) The air columns (C) formed are formed by being arranged in multiple rows in the left and right transverse directions,

When air is injected through the inlet 10a at the top, the inner sheet 13 functions as a kind of check valve so that the air filled in the air columns C does not leak to the outside, and the air filling state is maintained while buffering function. provides

Of course, not only a valve using the inner sheet 13 coated with such a heat-resistant member 13a, but also a known check valve that restricts the inflow of gas or air in only one direction may be used. All of the rims will be glued together to form a hermetic seal.

A non-explained reference numeral 14d is a finish fusion wire that is thermally bonded to the opposite end of the air inlet 10a to airtightly seal the air inlet.

Since the valve of the packaging bag 10 has little relation to the essential features of the present invention, a detailed description thereof will be omitted, and a valve of a different type from the valve shown in the drawings herein can be used, of course.

The buffer packaging material 100 using such a packaging bag 10, as shown in FIGS. 1 to 4,

bottom portion 110;

First side wall portions 120 that are bent upward at each of the front and rear ends in the longitudinal direction of the air columns (C) forming the bottom portion 110 and installed vertically;

second side wall portions 130 that are bent inwardly at one end or both ends of the air columns forming the first side wall portion 120 in the transverse direction, and are installed vertically;

Reinforcing parts 140 bent inwardly at lower ends in the longitudinal direction of the air columns C forming the second sidewall part 130, inserted overlappingly into the bottom part 110 and connected in the horizontal direction; including,

The other side (O2) and top surface (O1) of the cushioning packaging material (100) or the product fitting part in which the top surface (O1) of the cushioning packaging material (100) is opened, the reinforcement part (140) and the bottom part (110) It is characterized by having a double buffer structure for overlapping edge protection.

The first embodiment of the present invention shown in [A] of FIG. 1 covers all five sides of the article, including the front, rear, left, right, and bottom (or top) surfaces of the article, thereby protecting both edges of the article at once. is to do,

The second embodiment of the present invention shown in [B] of FIG. 1 covers four sides of the article, such as the front, rear, left (or right), and bottom (or top) of the article, to protect both edges of the article, respectively. By doing

There is only a difference in the number used for edge protection according to specifications such as the shape or length of the article (there is a difference only in that the second side wall portion 130 is one or two structurally),

As a structure having the same function in terms of increasing protection and safety as a double buffer structure for a portion where both edges of an article are connected, the first embodiment of the present invention will be described as a representative.

The bottom portion 110 and the first and second side wall portions 120 and 130 are bent and connected at right angles to each other to form the product fitting portion to protect the product inserted inside. In particular, the reinforcing portion 140 While overlapping on the inside of the bottom part 110, a double buffering structure is implemented, further doubling the buffering protection function for the corner of the article.

In particular, since the bottom part 110 and the reinforcing part 140 are formed in a direction in which the longitudinal directions of the air columns C are orthogonal to each other, the protection performance of the article by the overlapping air columns C is further improved.

Also, as described above, the first embodiment of the present invention has two second side wall parts 130 and reinforcing parts 140 on both sides, whereas the second embodiment of the present invention has one second side wall part ( 130) and the reinforcing part 140, small items having a left and right length of less than a certain amount are protected using the first embodiment, and large items having a left and right length of more than a certain amount are protected using the second embodiment to protect both sides of the product. Corners can be intensively protected, enabling customized use according to the size of the article, and as will be described later, in the case of a modification of the first embodiment in which the bottom portion 110 is in an open and close shape, it is easier to store and separate the article. can do.

In addition, at each corner between the bottom part 110 and the first side wall part 120, the second side wall part 130 and the reinforcing part 140, in the transverse direction at a predetermined stop position of the fusion lines C1 It is characterized in that a fusion portion 15b is provided in which the sheets are fused at a predetermined interval to form the communication portion 15a of each air column C.

The fused parts 15b are arranged at regular intervals in the form of a dotted line to form a communication part 15a between the fused parts 15b, and when air is injected, each air column C through the communication part 15a. Not only can the first sidewall portion 120 and the reinforcing portion 140 be easily folded (after air filling) through the close contact of the sheets due to the fused portion 15b while filling the air at once, but also the folded first The shape of the side wall portion 120 and the reinforcing portion 140 may be continuously maintained so that the cushioning packaging material 100 does not easily fall out.

Subsequently, a method of manufacturing the cushioning packaging material 100 according to the present invention will be described with reference to FIGS. 5 to 7 .

The manufacturing method of the cushioning packaging material 100 according to the present invention,

a) After folding the packaging bag 10 in the transverse direction, one end of the folded packaging bag 10' is fused in the longitudinal direction, or the bottom portion 110 of the lower edge of the folded packaging bag 10' fusing the corresponding part in the transverse direction, or fusing both of them;

b) cutting a part corresponding to the inner end of the reinforcing part 140 among the fusion lines C1 of the packaging bag 10' in the longitudinal direction;

c) After opening the overlapping first side wall portion 120 to pin the bottom portion 110, the second side wall portion 130, and the reinforcing portion 140, the reinforcing portion 140 is attached to the bottom portion 110. Folding by inserting overlapping inwardly;

d) Before or after step c), air is injected into the packaging bag 10' to expand the air columns C, so that the other side and top surface of the cushioning packaging material 100 or the cushioning packaging material 100 It is characterized in that it comprises; forming a double buffer structure for edge protection in which the upper surface of the article fitting part is opened and the reinforcing part 140 and the bottom part 110 are overlapped.

In addition, in step a), before folding the packaging bag 10, each corner between the bottom part 110 and the first side wall part 120, and the second side wall part 130 and the reinforcing part 140 It is characterized in that it includes a process of forming the communication part 15a of each air column C between the fusion parts 15b by fusing the corresponding part at a predetermined interval in the transverse direction.

Specifically, in step a), each length of the bottom portion 110, the first and second side wall portions 120 and 130, and the reinforcing portion 140 (air column ( Considering the longitudinal direction of C), if a dotted line-shaped fusion portion 15b is formed in the transverse direction at a predetermined position at the end of the fusion lines C1, the upper air columns C with respect to the fusion portion 15b Some are used as the first and second side wall parts 120 and 130, and some of the remaining lower air columns C are used as the bottom part 110 and the reinforcing part 140.

After forming the fusion portion 15b, the packaging bag 10 is folded in half in the left and right transverse directions, and then the end portion opposite the folding line f or part of the middle of the lower edge or both of them is fused in the longitudinal direction, , forming the first adhesive line 16a and / or the second adhesive line 16b (for convenience of understanding, the fusion lines, which are the basic structure of the packaging bag 10, are not separately marked with blanks, and the buffer packaging material (100), cross-sectional hatches are inserted and displayed only at the fusion portion 15b, the bonding lines 16a, 16b, and the fusion point 17a).

In this way, in step a), when both the first and second adhesive lines 16a and 16b are formed, the first embodiment has two second side wall parts 130 and a reinforcing part 140,

If only the second adhesive line 16b is formed without forming the first adhesive line 16a, the second embodiment has one second side wall portion 130 and a reinforcing portion 140,

If only the first bonding line 16a is formed without forming the second bonding line 16b, the bottom portion 110 can be opened and closed by rotating as a modified example of the first embodiment.

After the step a) is completed, when the step b) is performed, the bottom part 110 and the reinforcing part 140 are separated from each other by the cutting line 17 .

At this time, in the step b), after fusing the fusion point 17a having a larger outer diameter than the left and right width of the fusion line C1 at the upper end of the fusion line 17, the tear prevention hole inside the fusion point 17a ( 17b) may further include a process of perforating.

If the cutting line 17 is cut after forming the fusion point 17a and the tear prevention hole 17b, it is possible to prevent the packaging bag 10 from being torn in the longitudinal direction of the cutting line 17.

After step b) is completed, in step c), when the reinforcing part 140 extending to the lower end of the second side wall part 130 is inserted into the bottom part 110 and folded, the inner reinforcing part 140 and the outer bottom portion 110 overlap each other.

After completing step c), when air is injected into the inlet 10a in step d), all the air columns C expand and the folded packaging bag 10' unfolds into a box shape, and the inner reinforcing part 140 and The double buffer structure of the outer bottom part 110 is completed.

On the other hand, since the fused portion 15b is formed in step a), even if air is first injected into the air column C before step c) and step c) is performed, the second side wall portion 130 Based on the fusion line C1, the reinforcing part 140 and the bottom part 110 can be easily folded based on the fusion bonding part 15b, so that the inner reinforcement part 140 and the outer bottom part can be easily folded even in an air-buffered state. It can be completed by folding the double buffer structure of (110).

When step d) is completed in this way, the other side and the top surface of the box-shaped cushioning packaging material 100 or the top surface are opened, and the product can be protected by inserting the cushioning packaging material 100.

At this time, even if the second adhesive line 16b is not formed in step a), the bottom portion 110 can be opened and closed by folding or unfolding the bottom portion 110 starting from the fused portion 15b after filling the air, so that the corner of the article is buffered. After inserting the packing material 100, when packing the goods in a separate packing box, when the inner reinforcing part 140 and the outer bottom part 110 are sequentially folded, the reinforcing part 140 and the bottom part 110 ) can complete the overlapping double buffer structure.

According to the present invention, according to the shape or size of the article to be buffer-packed,

The two cushioning packaging materials 100 of the first embodiment are inserted into the top and bottom of the product, respectively, or

Alternatively, the four cushioning packaging materials 100 of the second embodiment can be inserted into both upper and lower corners of the product to protect it,

In the case of a modification of the first embodiment (a form in which the bottom portion 110 can be opened and closed), the bottom portion 110 can be opened to allow the product to be taken out more easily when unpacking depending on the type or shape of the product. .

In the above description of the present invention, the cushioning packaging material for corner protection and its manufacturing method have been mainly described with reference to the accompanying drawings, but the present invention is capable of various modifications, changes and substitutions by those skilled in the art, and these modifications, changes and substitutions are subject to the present invention. It should be construed as belonging to the protection scope of the invention.

C: air column C1: fusion wire
10, 10 ': packaging bag 11: first sheet
12: second sheet 13: inner sheet
100: buffer packaging material 110: bottom
120: first side wall portion 130: second side wall portion
140: reinforcement part

Claims (4)

In the cushioning packaging material for corner protection using a packaging bag (10) in which air columns (C) are arranged in the transverse direction by longitudinal fusion lines (C1),
The packaging bag 10 has a fusion portion 15b forming a communication portion 15a of each air column C by fusing sheets at a predetermined interval in the transverse direction at a predetermined position where the fusion lines C1 are interrupted. While forming
In a state where the packaging bag 10 is folded in the transverse direction,
The first adhesive line 16a is formed by fusing one end of the folded packaging bag 10' in the longitudinal direction, or the portion corresponding to the bottom portion 110 of the lower edge of the folded packaging bag 10' The second bonding line 16b is formed by fusion in the transverse direction, or both the first bonding line 16a and the second bonding line 16b are formed,
Of the fusion lines C1 of the packaging bag 10, portions corresponding to both ends of the reinforcing portion 140 are cut in the longitudinal direction to form a cutting line 17 for inserting the reinforcing portion 140,
Open the inside of the folded packaging bag (10') and fold the air columns (C) to form a buffer packaging bag for corner protection,
a bottom portion 110 in which air columns (C) are arranged in a transverse direction;
At each of the front and rear ends in the longitudinal direction of the air columns (C) forming the bottom portion 110, the air columns (C) are arranged in the horizontal direction while being bent upward from the fused portion (15b). The first side wall portion 120 is;
Standing in the vertical direction while bending inward from the fusion line C1 at which the cutting line 17 is formed at one end or both ends in the transverse direction of the air columns C forming the first side wall portion 120, a second side wall portion 130 in which air columns C are arranged in a transverse direction;
At the lower end of the longitudinal direction of the air columns (C) forming the second side wall portion 130, the reinforcing portion 140 is bent inward from the fused portion 15b as a starting point, and through the cutting line 17 While being inserted overlappingly into the inside of the bottom portion 110, it is connected in the horizontal direction,
As the air columns C are arranged in the longitudinal direction, which is a direction perpendicular to the air columns C of the bottom portion 110, the bottom portion ( 110) and overlapping reinforcement part 140; including,
A corner characterized in that it has a double buffer structure for corner protection in which the other side and top surface of the cushioning packaging material or the upper surface of the cushioning packaging material are opened, and the reinforcing portion 140 and the bottom portion 110 are overlapped. Protective cushioning packaging.
According to claim 1,
At the upper end of the cutting line 17, a fusion welding point 17a having an outer diameter greater than the left and right width of the fusion welding line C1 and a tear prevention hole 17b drilled inside the fusion junction 17a are Buffer packaging material for edge protection, characterized in that provided.
In the method of manufacturing a buffer packaging material for corner protection using a packaging bag (10) in which air columns (C) are arranged in the transverse direction by longitudinal fusion lines (C1),
The packaging bag 10 has a fusion portion 15b forming a communication portion 15a of each air column C by fusing sheets at a predetermined interval in the transverse direction at a predetermined position where the fusion lines C1 are interrupted. is formed,
a) After folding the packaging bag 10 in the transverse direction, one end of the folded packaging bag 10' is fused in the longitudinal direction to form a first adhesive line 16a, or the folded packaging bag 10' Of the lower edge of the bottom portion 110, the portion corresponding to the bottom portion 110 is fused in the transverse direction to form the second bonding line 16b, or both the first bonding line 16a and the second bonding line 16b are formed. doing;
b) forming a cutting line 17 for inserting the reinforcing part 140 by longitudinally cutting a portion corresponding to both ends of the reinforcing part 140 among the fusion lines C1 of the packaging bag 10 ;
c) After opening the overlapping first side wall portion 120 to pin the bottom portion 110, the second side wall portion 130, and the reinforcing portion 140, the reinforcing portion 140 is attached to the bottom portion 110. Folding by inserting overlapping inwardly;
d) before or after step c), injecting air into the packaging bag 10 to expand the air columns C; including,
a bottom portion 110 in which air columns (C) are arranged in a transverse direction;
At each of the front and rear ends in the longitudinal direction of the air columns (C) forming the bottom portion 110, the air columns (C) are arranged in the horizontal direction while being bent upward from the fusion portion (15b). The first side wall portion 120, which is
Standing in the vertical direction while bending inward from the fusion line C1 at which the cutting line 17 is formed at one end or both ends in the transverse direction of the air columns C forming the first side wall portion 120, The second side wall portion 130 in which the air columns C are arranged in the transverse direction,
At the lower ends in the longitudinal direction of the air columns (C) forming the second side wall portion 130, the reinforcing portion 140 is bent inward from the fused portion 15b as a starting point, and through the cutting line 17 Is connected in the horizontal direction while being inserted overlapping into the inside of the bottom portion 110,
As the air columns (C) are arranged in the longitudinal direction, which is a direction perpendicular to the air columns (C) of the bottom portion 110, the bottom portion ( 110) and a reinforcement part 140 overlapping,
Characterized in that the second side and upper surface of the cushioning packaging material or the upper surface of the cushioning packaging material is formed with a double buffering structure for corner protection overlapped with an article fitting part having an opening and the reinforcing part 140 and the bottom part 110 overlapping A method for manufacturing a cushioning packaging material for corner protection.
According to claim 3,
In the step b), after welding the fusion point 17a having a larger outer diameter than the left and right width of the fusion line C1 at the upper end of the cutting line 17, the tear prevention hole inside the fusion point 17a. (17b) A method of manufacturing a cushioning packaging material for corner protection, characterized in that it further comprises a step of perforating.

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