KR200328343Y1 - Cushion for a packaging box - Google Patents

Abstract

A packaging cushioning material for packaging and protecting an object including a curved surface is disclosed. The packaging cushioning material includes a first accommodating portion and a second accommodating portion in which bottom plates are connected to each other, and the first accommodating portion and the second accommodating portion are partially indented to form a curved portion corresponding to an object, and a rear surface of the curved portion is shaped like the curved portion. Correspondingly, the first and second receptacles are supported by first and second support pieces that are partially cut and bent, respectively. The first and second accommodating parts may be integrally connected to each other through the bottom plate, and the first and second accommodating parts may be rotated around the connected part to accommodate and release the object. A single packing buffer can be used to package the entire object, and the packing material, in which the object is packaged and protected, can be quickly inserted into or removed from the box.

Description

Buffer material for packaging {CUSHION FOR A PACKAGING BOX}

The present invention relates to a cushioning material for packaging, and more particularly, to a packaging buffer for protecting the object by filling the empty space inside the packaging box to accommodate the object to facilitate packaging.

When loading an object to be packaged in a packaging box, an empty space may be formed between the object and the object or between the object and the packaging box after loading the object. Such empty space may be generated by the shape of the object, and may be formed by the arrangement or size difference of the objects when storing two or more objects.

When an external force is applied to a packaging box containing an empty space, a portion adjacent to the empty space in the box may be partially recessed or damaged, and an object in the empty space in the box may not be provided with support from the surroundings, It can move or collide.

If the box is recessed or damaged, or if the package moves or collides within the box without surrounding support, the package can easily be damaged or broken during the transport process.

To prevent this, a packaging cushioning material is generally disclosed for filling a void in a packaging box or for interposing a package to protect the box and the package.

Conventional packaging cushioning materials are generally suitable for hexahedral shaped packages. For example, products such as refrigerators, televisions, computers, air conditioners and the like have an approximately hexahedral shape, and thus the packaging cushioning material also has a receiving groove composed of right angled surfaces.

However, as the technology develops, products are becoming smaller and slimmer, and as the design of the product is diversified, products having asymmetry and curvaceum are increasing. Conventional packaging cushioning materials based on a hexahedron for packaging products of such various designs are limited, and it is not easy to overcome the limitations of this shape in a conventional manner.

Accordingly, one object of the present invention is to provide a packaging cushioning material having a structure corresponding to the shape of an object including a curved surface.

In addition, another object of the present invention is to provide a packaging cushioning material that can be easily folded to form a structure, easy to assemble and dismantle, easy to transport and storage.

In addition, another object of the present invention is to provide a packaging cushioning material that can securely receive an object by receiving the object firmly.

1 is a development view of a packaging cushioning material according to a first embodiment of the present invention.

2 is a perspective view for explaining a manufacturing process of the packaging cushioning material according to the first embodiment.

3 is a state diagram of use of the packaging cushioning material according to the first embodiment.

4 is a development view of a packaging cushioning material according to a second embodiment of the present invention.

5 is a perspective view of a packaging cushioning material according to a second embodiment.

6 is a front view of a packaging shock absorber according to a second embodiment.

<Explanation of symbols for the main parts of the drawings>

OBJ: Object BOX: Box for packaging

100, 200: Packing material 110, 210 for packaging 1st accommodating part

120, 220: 2nd accommodating part 130, 230: 1st support piece

140, 240: 2nd support piece 150 and 250: 1st bending board

160, 260: second bend plate

According to a preferred embodiment of the present invention for achieving the above object of the present invention, the packaging cushioning material includes a first receiving portion and a second receiving portion integrally connected. The first accommodating portion and the second accommodating portion are indented in a curved shape to face each other to accommodate the object.

Specifically, the first accommodating portion includes a first bottom plate, a second side plate, a first top plate, and a first diaphragm connected through a fold line. Two first cut lines are formed to partially cut the first diaphragm and the first top plate perpendicular to the fold line, and the first top plate and the first diaphragm are connected via end fold lines connecting respective ends of the first cut lines. This partially indentation forms a first protective plate and a first curved plate bordering the first protective fold line. At least one first bending fold line is formed in the first bending plate, and the first bending plate is bent through the first bending fold line to form a curved surface corresponding to the object. A first side plate is partially cut in correspondence with the curved surface of the first curved plate, and the first supporting piece is bent inward to support the first curved plate to maintain a rigid structure.

The second receiving portion is integrally connected with the first bottom plate and includes a second bottom plate, a second side plate, a second top plate, and a second diaphragm that are sequentially connected to the first receiving portion via a fold line. Two second cut lines are formed to partially cut the second diaphragm and the second top plate perpendicular to the fold line, and the second top plate and the second diaphragm are connected via end fold lines connecting respective ends of the second cut lines. This partially indentation forms a second protective plate and a second curved plate bordering the second protective fold line. At least one second bending fold line is formed in the second bending plate, and the second bending plate is bent through the second bending fold line to form a curved surface corresponding to the object. A second side plate is partially cut in correspondence with the curved surface of the second curved plate, the second support piece is bent inward to support the second curved plate to maintain a rigid structure.

Depending on the shape of the object being received, both flexure plates, flex folds and support pieces may be symmetrical or asymmetrical. In the case of asymmetry, the shape, number and position of each flexure plate, fold line or support piece may be variously changed.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited or limited by the following embodiments.

Example 1

1 is an exploded view of a packaging cushioning material according to an embodiment of the present invention, Figure 2 is a perspective view for explaining the manufacturing process of the packaging cushioning material of Figure 1, Figure 3 is a state diagram used in the packaging cushioning material of FIG. In the developed view of FIG. 1, the solid line indicates the outline or the cut-out portion, the dashed-dotted line indicates the portion that is bent outwardly (ridge folding), and the dashed line indicates the portion that is bent inwardly (folding the valley).

1 to 3, the packaging cushioning material 100 includes a first accommodating part 110 and a second accommodating part 120, and the first and second accommodating parts 110 and 120 are formed of the first and second accommodating parts. The second bottom plates 111 and 121 are integrally connected to each other.

In the first accommodating part 110, the first bottom plate 111, the second side plate 112, the first top plate 113, and the first diaphragm 114 are sequentially connected through the fold line. Two first incisions 116 are formed to cut all of the first diaphragm 114 and a portion of the first upper plate 113 perpendicular to the fold line between the first upper plate 113 and the first diaphragm 114. The first top plate and the first diaphragm located inside the first incision line 116 are partially indented through the end fold lines 151a and 151b connecting the ends of both first incision lines 116. do. At this time, the first protective plate 154 and the first curved plate 150 are formed on the basis of the first protective fold line 156 formed between the end fold lines 151a and 151b. At this time, the first protective plate 154 is relatively adjacent to the first top plate 113, the first curved plate 150 is relatively adjacent to the first diaphragm 114.

A direction (folding ridge) bent in the first bend fold lines 152 is a vertex of a portion that is bent in the first protection fold line 156 as opposed to a direction (folding fold) that is bent in the first protection fold line 156. Q1 protrudes toward the second accommodating part 120 in the accommodating space formed by the first curved plate 150. The opening part of the accommodation space is narrowed by the part of the vertex Q1 in which the first protective fold line 156 is formed, whereby the object once received is securely fixed without departure.

Three first bent fold lines 152 are formed on the first bent plate 150, and the first bent plate 150 is bent through the first bent fold lines 152 to form curved surfaces corresponding to the object. do.

In addition, two first support pieces 130 and 135 having the first side plate 112 partially cut to correspond to the curved shape of the first curved plate 150 are formed. Both first support pieces 130 and 135 are symmetric with each other, and are bent inward of the first accommodating part 110 along the fold lines 131 and 136 to respectively support the rear surface of the first bent plate 150. . The structure of the first accommodating part 110 can be firmly maintained by the first support pieces 130 and 135, the movement of the received object OBJ in the box can be prevented, and the external object can be absorbed by absorbing an external impact. OBJ) can be protected. At this time, the vertices P1 of the first support pieces 130 and 135 correspond to the vertices Q1 of the first protective fold line 156 and the first support pieces 130 and 135. The vertex P1 of) supports the first protective fold line 156 to securely fix the object OBJ.

The second accommodating part 120 also includes a second bottom plate 121, a second side plate 122, a second top plate 123, and a second diaphragm 124 that are sequentially connected through a fold line. Since the second bottom plate 121 is connected to the first bottom plate 111 through a fold line, the first and second receiving parts 110 and 120 are integrally connected, and the fold line between the bottom plates 111 and 121 is connected. The first and second accommodating parts 110 and 120 rotate around the center to accommodate or release the object OBJ.

The second bottom plate 121, the second side plate 122, the second top plate 123, and the second diaphragm 124 of the second accommodating part 120 may be formed of the plates 111, 112, of the first accommodating part 110. 113, 114, and are arranged sequentially. Two second incisions 126 are formed to cut all of the second diaphragm 124 and a portion of the second upper plate 123 perpendicular to the fold line between the second upper plate 123 and the second diaphragm 124. The second top plate and the second diaphragm located inside the second incision line 126 are partially inwardly inward through the end fold lines 161a and 161b connecting the ends of the second incision line 126. do. At this time, the second protective plate 164 and the second curved plate 160 are formed on the basis of the second protective fold line 166 formed between the end fold lines 161a and 161b. In this case, the second protection plate 164 is relatively adjacent to the second top plate 123, and the second bending plate 160 is relatively adjacent to the second diaphragm 124.

The bending direction in the second bending fold lines 162 (folding the ridge) is the vertex of the portion bending in the second protection fold line 166 as opposed to the bending direction in the second protection folding line 166 (continuous folding). Q2 protrudes toward the first accommodating part 110 in the accommodating space provided by the second curved plate 160. Since the part of the vertex Q2 in which the second protective fold line 166 is formed forms a narrow opening of the accommodation space, the object once received is securely fixed without being separated.

Two second bending fold lines 162 are formed on the second bending plate 160, and the second bending plate 160 is bent through the second bending fold lines 162 to form a curved surface corresponding to the object. do. At this time, the position, the interval and the number of the bending fold line (152, 162) can be changed in various ways corresponding to the shape of the object, the first bending fold line 152 and the second bending fold line 162 are also asymmetric, respectively Or symmetrically formed.

Two second support pieces 140 and 145 are formed by partially cutting the second side plate 122 to correspond to the curved shape of the second flexure plate 160. Both of the second support pieces 140 and 135 are symmetrical to each other, and are bent inward of the second accommodating part 120 along the fold lines 141 and 146, respectively, to support the rear surface of the second bending plate 160. . The second support pieces 140 and 135 may maintain the structure of the second accommodating part 120 firmly, prevent movement of the received object OBJ, and protect the object OBJ from external impact. Can be. In this case, the vertices P2 of the second supporting pieces 140 and 135 correspond to the vertices Q2 of the second protective fold line 166, and the vertices P2 of the second supporting pieces 140 and 135 are made of first. The object OBJ can be securely fixed by supporting the two protective fold lines 166.

As shown in FIG. 2, end portions of the first diaphragm 114 and the first bottom plate 111 contact each other, and a first adhesive plate 115 connected to an end of the first diaphragm 114 is the first bottom plate 111. The first accommodating part 110 has a square pillar shape as a whole. As the first upper plate 113 and the first diaphragm 114 between the two first incision lines 116 are partially bent, a receiving space is formed by the first bending plate 150, and the first bending plate 150 is formed. The end of the) is connected to the first protective plate 154 through the first protective fold line 156, it is possible to form a narrow upper opening of the receiving space to prevent the object from being separated from the receiving space.

The second accommodating part 120 is also formed in the same step as the first accommodating part 110, and a bending process is illustrated.

Referring to FIG. 3, an object OBJ such as a camcorder includes a curved surface, and the bending plates 150 and 160 and the support pieces 130, 135, 140, and 145 of the first and second receiving portions 110 and 120. Are each formed to correspond to the curved surface of the adjacent object OBJ.

The first accommodating part 110 or the second accommodating part 121 may rotate to accommodate the object OBJ around the folding line to which the first and second bottom plates 111 and 121 are connected, and the object OBJ. The cushioning material for packaging 100 is accommodated in a packaging box (BOX).

The conventional packaging cushioning material is formed to correspond to a part of the object OBJ, that is, an edge or one surface, and packs the object OBJ which is a set of two or more packaging buffering materials. However, the packaging cushioning material 100 according to the present invention can be formed by cutting and bending one paper plate, and can fully accommodate all of the object OBJ. In addition, since the first and second receiving parts are integrally formed, the storage and transportation are easy, and the object OBJ can be quickly packed or separated, which is very useful. In addition, since the entire object OBJ is accommodated, the packaging cushioning material 100 can be easily inserted into or removed from the box.

Example 2

4 is an exploded view of a packing buffer according to a second embodiment of the present invention, FIG. 5 is a perspective view of the packing buffer of FIG. 4, and FIG. 6 is a front view of the packing buffer of FIG. 4. In the development of FIG. 4, the solid line indicates an outline or a cut-out portion, the dashed-dotted line indicates a portion that is bent outwardly (ridge folding), and a dashed line indicates a portion that is bent inwardly (folding the valley). In addition, in describing the packing buffer 200 according to the present embodiment, reference may be made to the description and drawings of the first embodiment.

4 to 6, the packing buffer 200 includes a first accommodating part 210 and a second accommodating part 220, and the first and second accommodating parts 210 and 220 are bottom plates 211. 221 is integrally connected via a medium.

The first accommodating part 210 includes a first bottom plate 211, a second side plate 212, a first top plate 213, and a first diaphragm 214 sequentially connected through a fold line. Two first incisions 216 are formed to cut all of the first diaphragm 214 and a portion of the first upper plate 213 perpendicular to the fold line between the first upper plate 213 and the first diaphragm 214. Two third cut lines 217 and a third cut line 217 which partially cut the first top plate 213 from the boundary of the first top plate 213 and the second diaphragm 214 and perpendicular to the boundary. Two fourth incisions 218 are formed in the inner side. The first protective fold line 254 is formed between the fourth cut line 218, and the locking plate 258 is formed between the third cut line 217 and the fourth cut line 218. An extension plate 259 connected to the first curved plate 250 is formed through an end fold line 251c connecting the end portions of the third incision line 217 and the first incision line 216.

Inside the cut lines 216, 217, 218 via end fold lines 251a, 251b, 251c connecting the respective ends of the cut lines 216, 217, 218 of the first receptacle 110. The positioned first top plate and the first diaphragm are partially curved inward. At this time, the first protective plate 254 is formed adjacent to the end fold lines 251a of the end portions of the third and fourth cut lines 217 and 218, and the first cut line 216 connected to the first adhesive plate 215. The first curved plate 250 is formed adjacent to the end fold line 251b at the end. The first protective plate 254 and the first curved plate 250 are connected to each other through the first protective fold line 256, and are bent at the boundary of the first protective fold line 256. The first protective fold line 256 is formed between the ends of the fourth incision line 218 to form a vertex on the upper portion of the first curved plate 250.

The direction (folding ridge) bent in the first bending fold line 252 is the vertex of the portion bent in the first protection fold line 256 as opposed to the direction bending in the first protection fold line 256 (continuous folding). Q1 protrudes toward the second accommodating portion 220 in the accommodating space formed by the first curved plate 250. Since the part of the vertex Q1 in which the first protective fold line 256 is formed forms a narrow opening of the accommodation space, the object once received is securely fixed without being separated.

Three first bent fold lines 252 are formed on the first bent plate 250, and the first bent plate 250 is bent through the first bent fold lines 252 to form curved surfaces corresponding to the object. do.

In addition, two first support pieces 230 and 235 are formed by partially cutting the first side plate 212 to correspond to the curved shape of the first curved plate 250. Both of the first support pieces 230 and 235 are symmetrical to each other, and are bent into the first accommodating part 210 at the boundaries of the fold lines 231 and 236 to respectively support the rear surface of the first bent plate 250. . By the first support pieces 230 and 235, the structure of the first accommodating part 210 can be maintained firmly, the movement of the received object OBJ can be prevented, and the object OBJ is protected from external impact. can do. In this case, the vertices P1 of the first supporting pieces 230 and 235 correspond to the vertices Q1 of the first protective fold line 256, and the vertices P1 of the first supporting pieces 230 and 235 are made of first. The object OBJ can be securely fixed by supporting the 1 protection fold line 256.

The fold line of the locking plate 258 is bent in a direction opposite to the first protective fold line 256. Therefore, the locking plate 258 is bent and positioned on the outer surfaces of the first support pieces 230 and 235, and the first support pieces 230 and 235 are supported by supporting the outer surfaces of the first support pieces 230 and 235. It can prevent it from moving.

The second receiving part 220 also includes a second bottom plate 221, a second side plate 222, a second top plate 223, and a second diaphragm 224 that are sequentially connected through a fold line. The second bottom plate 221 is connected to the first bottom plate 211 through a fold line, so that the first and second receiving portions 210 and 220 are integrally connected, and the fold line between the bottom plates 211 and 221 is connected. The first and second accommodating parts 210 and 220 rotate about the center to accommodate or release the object OBJ.

The second bottom plate 221, the second side plate 222, the second top plate 223, and the second diaphragm 224 of the second accommodating part 220 may be formed of the plates 211, 212, of the first accommodating part 210. 213 and 214, and are arranged sequentially. Two second cut lines 226 are formed to cut all of the second plate 224 and a portion of the second top plate 223 perpendicular to the fold line between the second top plate 223 and the second diaphragm 224. Two fifth cut lines 227 and fifth cut lines 227 which partially cut the second top plate 223 from the boundary of the second top plate 223 and the second diaphragm 224 perpendicular to the boundary. Two sixth incisions 228 are formed in the inner side. A second protective fold line 266 is formed between the sixth cut line 228, and a locking plate 268 is formed between the fifth cut line 227 and the sixth cut line 228. An extension plate 269 connected to the second curved plate 260 is formed through an end fold line 261c connecting the ends of the fifth incision line 227 and the second incision line 226.

Inside the incisions 226, 227, 228 via end fold lines 261a, 261b, 261c connecting the respective ends of the incisions 226, 227, 228 of the second receptacle 220. The positioned second top plate and the second diaphragm are partially inwardly indented. At this time, the second protective plate 264 is formed adjacent to the end fold lines 261a at the ends of the fifth and sixth cut lines 227 and 228, and the second cut line 226 connected to the second adhesive plate 225. The second curved plate 260 is formed adjacent to the end fold line 261b at the end. The second protective plate 264 and the second curved plate 260 are connected to each other through the second protective fold line 266, and are bent at the boundary of the second protective fold line 266. The second protective fold line 266 is formed between the ends of the third and fourth cut lines 227 and 228 to form a vertex Q2 above the second flexure plate 260.

The direction of bending at the second bending fold line 262 (folding ridge) is the vertex of the portion bending at the second protection fold line 266 as opposed to the direction of bending at the second protective fold line 266 (continuous folding). Q1 protrudes toward the second accommodating portion 220 in the accommodating space formed by the second curved plate 260. Since the part of the vertex Q1 in which the second protective fold line 266 is formed forms a narrow opening of the accommodation space, the object once received is securely fixed without being separated.

Two second bending fold lines 262 are formed in the second bending plate 260, and the second bending plate 260 is bent through the second bending fold lines 262 to form a curved surface for receiving the object. Form.

In addition, two second support pieces 240 and 245 in which the second side plate 222 is partially cut to correspond to the curved shape of the second curved plate 260 are formed. Both of the second support pieces 240 and 245 are symmetric with each other, and are bent inward of the second accommodating part 220 with respect to the fold lines 241 and 246, respectively, to support the rear surface of the second flexure plate 260. . By the second support pieces 240 and 245, the structure of the second accommodating part 220 can be firmly maintained, the movement of the received object OBJ can be prevented, and the object OBJ is protected from external impact. can do. At this time, the vertices P2 of the second supporting pieces 240 and 245 correspond to the vertices Q2 of the second protective fold line 266, and the vertices P2 of the second supporting pieces 240 and 245 are made of the first vertices P2. The object OBJ can be securely fixed by supporting the two protective fold lines 266.

The fold line of the locking plate 268 is bent in a direction opposite to the second protective fold line 266. Therefore, the locking plate 268 is bent and positioned on the outer surfaces of the second support pieces 240 and 245, and the locking plate 268 supports the outer surfaces of the second support pieces 240 and 245 so that the locking plate 268 is the second support piece. The movements 240 and 245 can be prevented.

The packaging cushioning material according to the present invention may be formed by cutting and bending one paper plate, and can fully accommodate the whole packaged one. In addition, the first and second receiving portions are integrally formed to facilitate storage and transportation, and can be quickly packaged or separated to be packaged, which is very useful. In addition, the packaging cushioning material can be easily inserted into or removed from the box because one packaging cushioning material accommodates the entire package.

As described above, the present invention has been described with reference to a preferred embodiment of the present invention, but those skilled in the art various modifications and changes of the present invention without departing from the spirit and scope of the present invention described in the claims below I can understand that you can.

Claims (4)

In the packaging buffer for packaging and protecting the object including the curved surface, A first bottom plate, a first side plate, a first top plate, and a first diaphragm sequentially connected through a fold line, wherein the first upper plate and the first diaphragm are partially indented to correspond to the shape of the object. A first accommodating part including a first accommodating space; And A second bottom plate, a second side plate, a second top plate, and a second diaphragm sequentially connected through a fold line, wherein the second upper plate and the second diaphragm are partially indented to correspond to the shape of the object. A cushioning material for packaging, comprising a second accommodating portion for accommodating the object, such as the first accommodating portion, including an accommodating space. The method of claim 1, The first bottom plate and the second bottom plate is connected via a fold line, the packaging buffer, characterized in that the first receiving portion and the second receiving portion is integrally connected. The method of claim 1, The first receptacle includes two first incisions partially cut in the first diaphragm and the first top plate perpendicular to the fold line, and mediates end fold lines connecting each end of the first incisions. The first upper plate and the first diaphragm are partially indented to form a first protective plate adjacent to the first upper plate bounded by a first protective fold line and a first curved plate adjacent to the first diaphragm. The first curved plate is sequentially bent to form a curved surface corresponding to the object through at least one first curved fold line formed in the plate, and the first side plate is partially cut to correspond to the curved surface of the first curved plate. At least one first support piece, wherein the first support piece is bent inward to support the first bending plate, The second accommodating portion includes two second incisions in which the second diaphragm and the second top plate are partially cut perpendicular to the fold line, and mediates end fold lines connecting each end of the second incision lines. The second upper plate and the second diaphragm are partially indented to form a second protective plate adjacent to the second upper plate bordering a second protective fold line and a second curved plate adjacent to the second diaphragm, wherein the second curved plate The second curved plate is sequentially bent to form a curved surface corresponding to the object through at least one second curved fold line formed in the plate, and the second side plate partially cuts to correspond to the curved surface of the second curved plate. And at least one second support piece, wherein the second support piece is bent inward to support the second flexure plate. The method of claim 1, The first accommodating portion includes two first incisions formed by partially cutting the first diaphragm and the first upper plate perpendicular to the fold line, and are positioned inside the first incisions, and the upper plate is partially incised. Includes two third incisions formed and two fourth incisions positioned inside the third incisions and formed by partially cutting the upper plate, The first top plate and the first diaphragm are partially indented to the end fold line connecting the ends of the fourth incisions and the end fold line connecting the ends of the first incisions to border the first protective fold line. A first protective plate adjacent to the first upper plate and a first curved plate adjacent to the first diaphragm are formed, and the first curved plate is sequentially bent through at least one first bending fold line formed in the first curved plate. And forming at least one curved surface corresponding to the object, wherein the first side plate is partially cut away to correspond to the curved surface of the first curved plate, and the first support piece is bent inward to The first bending plate is supported, and the engaging plate formed between the third and fourth cut lines is bent opposite to the bending direction in the first protective fold line to support the side surface of the first supporting piece. And The second accommodating portion includes two second incisions formed by partially cutting the second diaphragm and the second upper plate perpendicular to the fold line, and are positioned inside the second incisions, and the upper plate is partially incised. Two fifth cut lines formed and two sixth cut lines positioned inside the fifth cut lines and formed by partially cutting the upper plate, The second top plate and the second diaphragm are partially indented to the end fold line connecting the ends of the sixth incisions and the end fold line connecting the ends of the second incisions to border the second protective fold line. A second protective plate adjacent to the second upper plate and a second curved plate adjacent to the second diaphragm are formed, and the second curved plate is sequentially bent through at least one second curved fold line formed in the second curved plate. A curved surface corresponding to the object, and including at least one second support piece having the second side plate partially cut in correspondence to the curved surface of the second curved plate, wherein the second support piece is bent inward to The second bending plate supports the second bending plate, and the engaging plate formed between the fifth and sixth cut lines is bent in a direction opposite to the bending direction of the second protective fold line to support the side surface of the second supporting piece. Packaging buffer material characterized in that.