Manufacturing method and manufacturing device for sheet-shaped cushioning material

Abstract

To provide a manufacturing device or the like for a sheet-like cushioning material.SOLUTION: A manufacturing device 101 for a sheet-like cushioning material 701 includes: conveyance means for continuously conveying a first base material 11 made of a roll-shaped thermoplastic resin and a second base material 12 made of a roll-shaped thermoplastic resin to make a lamination material 13 in which the first base material 11 and the second base material 12 are superimposed; welding means 41 for welding the lamination material 13 to provide a welded part; and processing means 51 for processing a cut part of the sheet-like cushioning material 701 by providing staggered cut parts in the lamination material 13 in line with the welded part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing a sheet-type cushioning material, a manufacturing apparatus for a sheet-type cushioning material, and a sheet-type cushioning material. [Background technology]

[0002] Foamed resin cushioning materials, also known as fruit caps, are used for individual fruit packaging. The following documents are also available regarding cushioning materials:

[0003] Patent document 1 discloses a fruit cushioning material that protects fruit from external impacts, etc., and is made by bonding soft foamed resin strips and hard foamed resin strips made of a foamed resin material in a cross-net pattern.

[0004] Patent Document 2 discloses a fruit cap that is made up of a mesh-like tubular main body formed by overlapping a large number of foamed polyethylene linear bodies on the outer layer and a large number of foamed polyethylene linear bodies on the inner layer, crossing them at a certain angle, and fusing the overlapping parts together, and one open end of the tubular main body is closed by fusing the foamed polyethylene linear bodies of the inner and outer layers. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3170893 [Patent Document 2] Japanese Patent Application Publication No. 8-301373 Summary of the Invention [Problem to be solved by the invention]

[0006] These cushioning materials are made of foamed resin, so they are bulky even when not in use and difficult to store due to their shape. Furthermore, because the resin is extruded into a linear shape and then glued and cut, they are difficult to mold into anything other than a cylindrical shape. This makes it difficult to accommodate fruit and other items, and it can be difficult to create cushioning materials shaped to fit different types of fruit. Therefore, new methods for manufacturing cushioning materials are needed.

[0007] Under these circumstances, an object of the present invention is to provide a sheet-type cushioning material, and an apparatus and method for manufacturing the same. [Means for solving the problem]

[0008] The present inventors have conducted extensive research to solve the above problems and have found that the following inventions meet the above objectives, thereby completing the present invention.

[0009] <1> a conveying step of continuously conveying a first substrate containing a roll-shaped thermoplastic resin and a second substrate containing a roll-shaped thermoplastic resin to form a laminated material in which the first substrate and the second substrate are superimposed; a welding step of welding the laminated material to form a welded portion; A manufacturing method for a sheet-like cushioning material, comprising a cutting processing step of forming staggered cut portions in the laminate material to match the welded portions and processing the cut portions of the sheet-like cushioning material. <2> The cutting process is a process of punching out a sheet-like cushioning material, a winding step of winding up the end material around the sheet-like cushioning material, <1> The manufacturing method described in <3> The cutting unit has a winding step of winding the sheet-like cushioning material into a strip shape by providing a slit for cutting. <1> The manufacturing method described in <4> The first substrate and the second substrate have a basis weight of 50 g / m 2 The above nonwoven fabric <1> ~ <3> 1. The manufacturing method according to any one of the preceding claims. <5> a conveying means for continuously conveying a roll-shaped first substrate containing a thermoplastic resin and a roll-shaped second substrate containing a thermoplastic resin, and forming a laminated material by overlapping the first substrate and the second substrate; a welding means for welding the laminated material to form a welded portion; and a cutting means for forming staggered cuts in the laminated material in accordance with the welded portions, and processing the cut portions of the sheet-like cushioning material. <6> a laminated material in which a sheet-like first substrate and a sheet-like second substrate are superimposed; a welded portion formed by welding the periphery of the laminated material; A staggered cut portion provided on the inner side of the surface of the welded portion; and an opening where the welded portion is not provided. [Effects of the Invention]

[0010] According to the present invention, a sheet-like cushioning material and a manufacturing apparatus and method thereof are provided. The sheet-like cushioning material of the present invention can be stored in the form of sheets or rolls, and can be made into a sheet-like material that does not take up much space. Furthermore, the manufacturing apparatus and method of the present invention are used to manufacture such cushioning material. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic diagram of an embodiment of a manufacturing apparatus of the present invention. [Figure 2] FIG. 1 is a flow diagram of a manufacturing method of the present invention. [Figure 3] 1 is a schematic diagram for explaining the manufacturing method of the present invention. FIG. [Figure 4] 1 is a schematic diagram illustrating an embodiment of a sheet-type cushioning material of the present invention. [Figure 5] 1 is a schematic diagram for explaining the manufacturing method of the present invention. FIG. [Figure 6] 1 is a schematic diagram of an embodiment of a manufacturing apparatus of the present invention. [Figure 7] FIG. 1 is a flow diagram of a manufacturing method of the present invention. [Figure 8] 1 is a schematic diagram for explaining the manufacturing method of the present invention. FIG. [Figure 9] 1 is a schematic diagram illustrating an embodiment of a sheet-type cushioning material of the present invention. [Figure 10] 1 is a schematic diagram for explaining the manufacturing method of the present invention. FIG. [Figure 11] 1 is a schematic diagram illustrating an embodiment of a sheet-type cushioning material of the present invention. [Figure 12] 1 is an image relating to a manufacturing example of a sheet-like cushioning material of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] The following describes in detail an embodiment of the present invention, but the following description of the constituent elements is one example (typical example) of an embodiment of the present invention, and the present invention is not limited to the following content unless the gist of the present invention is changed. Note that when the expression "to" is used in this specification, it is used as an expression that includes the numerical values ​​before and after it.

[0013] [Production method of the present invention] The method for producing a sheet-like cushioning material of the present invention includes a conveying step of continuously conveying a first substrate containing a roll-shaped thermoplastic resin and a second substrate containing a roll-shaped thermoplastic resin to form a laminated material by overlapping the first substrate and the second substrate, a welding step of welding the laminated material to form welded portions, and a cutting step of forming staggered cut portions in the laminated material to match the welded portions and processing the cut portions of the sheet-like cushioning material. The method for producing a sheet-like cushioning material of the present invention may be referred to as the "production method of the present invention."

[0014] [Manufacturing apparatus of the present invention] The sheet-type cushioning material manufacturing apparatus of the present invention comprises: a conveying means for continuously conveying a roll-shaped first substrate containing a thermoplastic resin and a roll-shaped second substrate containing a thermoplastic resin to form a laminated material by overlapping the first substrate and the second substrate; a welding means for welding the laminated material to form welded portions; and a cutting means for cutting staggered cut portions in the laminated material to match the welded portions and process the cut portions of the sheet-type cushioning material. The sheet-type cushioning material manufacturing apparatus of the present invention may be referred to as the "manufacturing apparatus of the present invention."

[0015] [Sheet-shaped cushioning material of the present invention] The sheet-like cushioning material of the present invention comprises a laminated material formed by overlapping a sheet-like first substrate and a sheet-like second substrate, a welded portion where the periphery of the laminated material is welded, a staggered cut portion provided on the inside of the plane of the welded portion, and an opening where the welded portion is not provided.

[0016] In addition, in the present application, the manufacturing method of the present invention can be carried out using the manufacturing apparatus of the present invention, and the sheet-shaped cushioning material of the present invention can be manufactured using these, and the corresponding configurations in the present application can be used mutually.

[0017] Polyethylene foam cushions are lightweight and bulky. They are primarily used for packaging fruit, and demand varies geographically and seasonally. Therefore, there is a need for cushioning materials that are easy to transport and store. The present invention provides a sheet-like cushioning material that is easy to store. This sheet-like cushioning material can be stored in sheet form, stacked on top of each other, or rolled up. When in use, it can be unfolded through the opening to protect fruit and other items.

[0018] [Manufacturing equipment 101] FIG. 1 is a schematic diagram of an embodiment of a manufacturing apparatus of the present invention. The manufacturing apparatus 101 is an apparatus that continuously transports and processes a first substrate 11 and a second substrate 12. The first substrate 11 is transported from a first roll 21 as a substrate wound in a strip shape, and the second substrate 21 is transported from a second roll 22 as a substrate wound in a strip shape. In FIG. 1, the manufacturing apparatus 101 transports substrates and the like from left to right. The transport means transports the substrates in a flow in which the substrates are fed from the first roll 21 or the second roll 22 and wound up by a winder 61. The substrates are transported between these rolls via sequentially arranged drive rolls, free rolls, and the like, and are appropriately processed.

[0019] The manufacturing apparatus 101 has a laminating roll 31, welding means 41, and cutting means 51. The laminating roll 31 overlaps a first substrate 11 and a second substrate 12 to form a laminated material 13. The welding means 41 is a device for welding the laminated material 13 to form welded portions. The cutting means 51 is a device for processing notches and cut-out portions in the laminated material 13. The container 52 is a container for storing the cut-out sheet-like cushioning material 701. Scrap material 14 is wound on a winder 61 and collected.

[0020] [Manufacturing flow example] FIG. 2 is a flow diagram of the manufacturing method of the present invention. This manufacturing flow can be performed using manufacturing apparatus 101, etc. In this manufacturing method, first, step S11 is a process of conveying first substrate 11 and second substrate 12. Next, step S21 is a process of partially welding laminated material 13, which is made by overlapping first substrate 11 and second substrate 12, using welding means 41. Next, step S31 is a process of providing staggered slits (notches) in accordance with the welded portions, performing a cutout process to provide cutout portions in accordance with the welded portions, and then performing punching to cut out from these cutout portions. In this way, a sheet-like cushioning material is obtained. Then, in step S41, the scrap material 14 of the laminated material after the sheet-like cushioning material has been removed is wound up on winder 61.

[0021] [First substrate 11, second substrate 12] The first substrate and the second substrate are substrates containing a thermoplastic resin. Hereinafter, the first substrate and the second substrate may be simply referred to as "substrates used in the present invention." By containing a thermoplastic resin, processing to form a welded portion by welding means can be performed. In particular, a substrate in which a thermoplastic resin is used as the main material is used for the surface where the first substrate 11 and the second substrate 12 contact. Examples of thermoplastic resins that can be used include polyester, polypropylene, rayon, nylon, vinylon, aramid fiber, and biodegradable resins, and mixtures of these can also be used as appropriate.

[0022] The substrate used in the present invention may be any substrate containing a thermoplastic resin as the main material, and may also contain other materials as appropriate. Substrates containing a thermoplastic resin include those made of a thermoplastic resin, those mixed with other materials, and laminates having a thermoplastic resin layer. As long as the surface of the laminate to be welded is made of a thermoplastic resin, other resins or layers other than resins may be provided in the other layers. For example, a laminate of a paper layer and a resin layer can be used.

[0023] The substrate used in the present invention may be, for example, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, or 98% by mass or more of a thermoplastic resin. The thermoplastic resin may be a thermoplastic resin. Other materials that can be used include thermosetting resins, adhesives, weathering agents, stabilizers, plasticizers, colorants, pulp, natural materials, and various other materials used in forming sheets, fibers, membranes, films, nonwoven fabrics, synthetic paper, and the like.

[0024] The substrate used in the present invention is preferably a nonwoven fabric. By using a nonwoven fabric, when a cutout or a cut-out portion is provided, the strength and shape of the buffer material can be easily maintained even if the direction and location of the cutout can be freely designed in various directions and angles. In addition, the substrate used in the present invention has a basis weight of 50 g / m 2By using a nonwoven fabric with a high basis weight, the shape stability when unfolded from the slits is improved and the cushioning effect is also high. 2 or more, 70g / m 2 More than 150 g / m is more preferable. Taking into consideration the workability of adhesion, cutting and cutting, the upper limit is 150 g / m 2 or less than 120g / m 2 Below 100g / m 2 The following may also be used: Polypropylene nonwoven fabric is particularly preferred because of its processability.

[0025] [First roll 21, second roll 22] The substrates used in the present invention are strip-shaped substrates, with the first substrate 11 being fed from a first roll 21 and the second substrate 12 being fed from a second roll 22. These are overlaid and laminated by a laminating roll 31. Before reaching the laminating roll 31, the substrates may be overlaid while appropriately controlling the edge position. The conveying speed of these substrates is set appropriately depending on the processing speed, etc.

[0026] [Laminated Material 13] The laminated material 13 is a base material that is laminated to include a first base material 11 and a second base material 12. This lamination is performed by simply overlapping the first base material 11 and the second base material 12, making it easy to perform subsequent processing.

[0027] [Processing of laminated material 13] Fig. 3 is a schematic diagram for explaining the manufacturing method of the present invention, which can be performed using manufacturing apparatus 101, etc. Fig. 3 explains the processing performed on laminated material 13, particularly, by welding means 41 and cutting means 51, in manufacturing apparatus 101. In Fig. 3, laminated material 13, etc., is viewed from a planar direction, and laminated material 13 is transported from left to right.

[0028] [Welding means 41] 1 and the like is a means for welding predetermined positions of the laminated material 13. Since the laminated material 13 is made by overlapping the base materials used in the present invention, it can be welded and bonded by heat treatment or ultrasonic treatment. For example, the welding means 41 can be a roll such as an ultrasonic roll, which has protrusions corresponding to the welding portions, and which welds the portions where these protrusions contact the laminated material 13.

[0029] Area A1 in FIG. 3 illustrates welding performed by welding means 41. Welding means 41 provides a welding portion 710 in laminate 13. This welding portion 710 is a welding portion to be formed into welding portion 71 in sheet-like cushioning material 701 shown in FIG. 4. Welding portion 710 can be adjusted appropriately to fit the shape of sheet-like cushioning material 701. When sheet-like cushioning material 701 uses opening 74 as the upper portion, it has a U-shaped bottom that narrows toward the bottom and forms a receptacle with a closed bottom. Welding portion 710 is welded to match this shape.

[0030] [Cutting means 51] Area A2 in FIG. 3 is used to explain the cutting process performed by the cutting means 51. The cutting means 51 forms staggered cutouts 72 in the laminate 13 to match the welded portions 710. The cutting means 51 also processes cutouts 73 in the sheet-like cushioning material 701 (see FIG. 4). The cutouts 73 cut out a portion to be provided within the welded portion 710 (a portion along the center of the welded portion 710) and a cutout portion to be provided as an opening 74 (the lower end side in area A2 in FIG. 3). These cutouts 72 and cutouts 73 penetrate the first substrate 11 and second substrate 72 that constitute the laminate 13. The cutting means 51 may be a die-cut roll or other roll with protrusions corresponding to the cutouts 72 and cutouts 73, and the protrusions process the areas where they contact the laminate 13.

[0031] Area A3 in Fig. 3 is scrap material 14 of laminated material 13 after it has passed through cutting means 51. In the embodiment shown in Figs. 1 and 3, cutting means 51 punches out sheet-like cushioning material 701 from laminated material 13. After processing laminated material 13, the punched sheet-like cushioning material 701 is stored in container 52 one by one.

[0032] The scrap material 14 around the portion that will become the sheet-like cushioning material is continuously wound up by the winder 61. In this embodiment, the scrap material 14 is an end portion of the laminated material 13. The center of the scrap material 14 is a space 141 punched out of the sheet-like cushioning material 701. In this embodiment, the scrap material 14 can be transported in a continuous, connected state, and therefore can be efficiently collected by the winder 61.

[0033] [Sheet-type cushioning material 701] Fig. 4 is a schematic diagram of an embodiment of a sheet-type cushioning material of the present invention. Fig. 4 is a plan view of sheet-type cushioning material 701 with the first substrate 11 side facing up. The sheet-type cushioning material 701 has a laminated material 13 formed by overlapping a sheet-like first substrate 11 and a sheet-like second substrate 12 (back surface side). The sheet-type cushioning material 701 also has a welded portion 73 where the periphery of the laminated material 13 is welded. The sheet-type cushioning material 701 also has a staggered cut portion 72 provided on the inside of the plane of the welded portion 73. The sheet-type cushioning material 701 also has an opening 74 where the welded portion 73 is not provided.

[0034] Sheet-like cushioning material 701 can be unfolded and fruit or other items can be placed through opening 74 to be protected. Because opening 74 is not welded to sheet-like cushioning material 701, first base material 11 and second base material 12 are simply overlapped, and can be separated by pulling them apart. This allows sheet-like cushioning material 701 to be unfolded into a bag shape.

[0035] Furthermore, because the cutouts 72 are arranged in a staggered pattern, the more the sheet-like cushioning material 701 is unfolded into a bag shape, the wider the cutouts 72 become, allowing for a larger opening. Furthermore, when unfolded, the cutouts 72 unfold in an upright position. The inclination of the spaces between the cutouts 72 creates a shape that provides cushioning. Furthermore, because the welded portions 73 are provided, the unfolded shape of the sheet-like cushioning material 701 remains constant. Furthermore, the welded portions 73 form a receiving portion that forms the bottom of the closed shape on the opposite side of the opening 74 (the right side in Figure 4). Therefore, the contents stored inside will not fall out or drop out from anywhere other than the opening 74.

[0036] The size of the sheet-like cushioning material 701 can be appropriately set depending on the object to be stored. The size can be adjusted by changing the width of the base material used in the present invention or by setting the shape of the mold used for ultrasonic processing or heat processing to process the welded portion 71 (710) and the cut-out portion 73. The width of the opening 74 of the sheet-like cushioning material 701 (top and bottom in FIG. 4) can be 3 cm to 20 cm, for example. The length of the sheet-like cushioning material 701 (left and right in FIG. 4) can be 3 cm to 25 cm, for example. The lower limits of the width and length can be 5 cm or more, or 7 cm or more. The upper limits of the width and length can be 18 cm or less, 15 cm or less, or 12 cm or less. The width and length of the sheet-like cushioning material 701 may be approximately the same, or the width or length may be long. Furthermore, during storage, the sheet-like cushioning material 701 is a relatively thin sheet consisting of a first base material and a second base material stacked together. The thickness depends on the base material and processing step, but can be, for example, 10 mm or less, 5 mm or less, 3 mm or less, 2 mm or less, etc. The sheet-like cushioning material 701 is suitable for storing fruit, etc., and can be used for apples, pears, persimmons, peaches, etc., and the size is set according to the items to be stored.

[0037] [Manufacturing process variations] FIG. 5 is a schematic diagram for explaining the manufacturing method of the present invention. FIG. 5 is a modified example of the schematic diagram shown in FIG. 3, and the configurations related to regions A1 and A3 are common. In FIG. 5, the cutting process related to region A2 in FIG. 3 is divided into regions A21 and A22. Region A21 is the area where the staggered cutouts 72 are first formed. Region A22 is the area where the cutouts 73 are then formed and punched out. In this way, the process according to the present invention may be appropriately divided into multiple stages and performed by different processing means.

[0038] [Manufacturing equipment 102] 6 is a schematic diagram of an embodiment of a manufacturing apparatus of the present invention. The manufacturing apparatus 102 is a partial modification of the manufacturing apparatus 101 of FIG. 1, and has a partially common configuration for processing the first substrate 11 and the second substrate 12. The manufacturing apparatus 102 has a cutting means 53 instead of the cutting means 51 of the manufacturing apparatus 101. The cutting means 53 is a device that processes incisions and cutouts in the laminated material 13.

[0039] The manufacturing apparatus 102 is configured to wind up the sheet-like cushioning material as processed laminated material 15 while it is connected to the portion that was made into scrap material 14 in the manufacturing apparatus 101 without punching it out. The manufacturing apparatus 102 has a laminating roll 31, welding means 41, and cutting means 51. The laminating roll 31 forms the laminated material 13 by overlapping the first substrate 11 and the second substrate 12. The welding means 41 is a device for welding the laminated material 13 to form a welded portion.

[0040] [Manufacturing flow example] FIG. 7 is a flow diagram of the manufacturing method of the present invention. This manufacturing flow can be performed using manufacturing apparatus 102, etc. In this manufacturing method, first, step S12 is a step of conveying first substrate 11 and second substrate 12. Next, step S22 is a step of partially welding laminated material 13, in which first substrate 11 and second substrate 12 are overlapped, using welding means 41. Next, step S321 is a step of providing staggered slits (notches) in accordance with the welded portions. Step S322 is a step of performing cutout processing to provide cutout portions in accordance with the welded portions. This results in processed laminated material 15 including sheet-like cushioning material. Finally, step S42 is a step of winding processed laminated material 15 onto winder 61.

[0041] [Processing of laminated material 13] Fig. 8 is a schematic diagram for explaining the manufacturing method of the present invention. Fig. 8 explains the processing performed on the laminated material 13 in the manufacturing apparatus 102, particularly by the welding means 41 and the cutting means 53. In Fig. 8, the laminated material 13 is viewed from a planar direction, and the laminated material 13 is transported from left to right. This processing is similar to that shown in Fig. 3.

[0042] Area A11 in FIG. 8 illustrates welding performed by welding means 41. Welding means 41 provides welded portion 13 in laminate 13. This welded portion 710 is a welded portion that will become welded portion 71 in sheet-like cushioning material 702 shown in FIG. 9. Welded portion 710 during processing can be adjusted as needed to fit the shape of sheet-like cushioning material 702. Welded portion 71 of sheet-like cushioning material 702 has a shape that forms a U-shaped bottom, becoming a receptacle with a closed bottom, when opening 74 is positioned facing left. Welded portion 710 is welded to match this shape.

[0043] [Cutting means 53] Area A23 in FIG. 8 illustrates the cutting process performed by the cutting means 53. The cutting means 53 forms staggered cuts 72 in the laminate 13 in area A23 to match the welded areas 710. The cutting means 53 also forms cutouts 73 in the sheet-like cushioning material 702 (see FIG. 9) in area A24. The cutouts 73 are formed by intermittently cutting out the portions to be formed within the welded areas 710. The cutouts 73 are formed near the center of the welded areas 710 in the TD direction, which is perpendicular to the MD direction of the laminate 13. The cutouts 72 penetrate the first substrate 11 and the second substrate 12 that constitute the laminate 13. The processed laminate 15, which has the welded areas 710, the cutouts 72, and the cutouts 73, includes the sheet-like cushioning material and is continuously wound up by the winder 61.

[0044] [Sheet-type cushioning material 702] Fig. 9 is a schematic diagram of an embodiment of a sheet-like cushioning material of the present invention. Sheet-like cushioning material 702 in Fig. 9 has a configuration similar to that of sheet-like cushioning material 701 in Fig. 4. Sheet-like cushioning material 702 is obtained from processed laminated material 15 manufactured by the manufacturing example shown in Figs. 6 to 8. Processed laminated material 15 has cutout portions 73 formed therein. Sheet-like cushioning material 702 can be obtained by cutting along the cutout lines of cutout portions 73, similar to sheet-like cushioning material 701.

[0045] The processed laminate 15 can be considered to be a continuous string of sheet-like cushioning materials 702, and in this state it can be transported and wound up in a strip. The opening of this processed laminate 15 is located on the lower side in Figure 8. Therefore, while it is being transported in a strip, it is also possible to continuously place objects to be contained through the opening.

[0046] [Example of processing laminated material 13] FIG. 10 is a schematic diagram for explaining the manufacturing method of the present invention. FIG. 10 shows processing similar to the processing example of the laminated material 13 in FIG. 8. In this processing example, in region A12, both ends of the laminated material 13 in the TD direction are welded, and the laminated material 13 is welded so as to cross the TD direction. In region A25, notches 72 are provided in a staggered pattern parallel to the conveying direction. In region A26, cutouts 73 are provided. Unlike the example in FIG. 8, these cutouts 73 are provided in positions that do not overlap with the welded portions 710. The processed laminated material 151 thus processed is continuously transported in a strip shape.

[0047] [Sheet laminate 703] Fig. 11 is a schematic diagram of an embodiment of the sheet-like cushioning material of the present invention. The sheet-like laminated material 703 is obtained by cutting the processed laminated material 151 of Fig. 10 at the cutout portion 73. The sheet-like laminated material 703 can be obtained by cutting in this manner.

[0048] In this way, the sheet-like cushioning material of the present invention can be stored in sheet form, stacked on top of each other, or in roll form, and when in use, can be unfolded through the opening to contain and protect fruit or other items. [Example]

[0049] Figure 12 is an image of a manufacturing example of the sheet-like cushioning material of the present invention. The left side of Figure 12 shows the sheet-like cushioning material in storage before being unfolded. This sheet-like cushioning material has a basis weight of 80 g / m 2 This was made using two sheets of PP nonwoven fabric. The two long sides of the rectangle and one short side, which is the bottom, were welded together using ultrasonic treatment. In addition, a staggered cut was made on the inside of the welded surface. Cutouts were made to match this shape and the sheet was punched out to produce it.

[0050] The right side of Figure 12 shows this sheet-like cushioning material used to contain and protect an apple. In this way, the sheet-like cushioning material of the present invention can be made into a thin sheet that does not take up much space during storage, and when in use, it can be unfolded and unfolded through the opening to contain fruit or other items. In this case, using a nonwoven fabric with a large basis weight will provide even greater cushioning. [Industrial Applicability]

[0051] The present invention can be used as a cushioning material for storing and protecting fruit and the like, and is therefore industrially useful. [Explanation of symbols]

[0052] 101, 102 Manufacturing equipment 11 First substrate 12 Second substrate 13 Laminated materials 14 Scraps 15, 151 Processed laminated materials 21 First Roll 22 Second Roll 31 Laminated roll 41 Welding means 51, 53 Cutting processing means 52 container 61 Winder 701, 702, 703 Sheet-type cushioning material 71, 710 Welded part 72 Notch 73 Cutout 74 Opening

Claims

1. a conveying step of continuously conveying a first substrate containing a roll-shaped thermoplastic resin and a second substrate containing a roll-shaped thermoplastic resin to form a laminated material in which the first substrate and the second substrate are superimposed; a welding step of welding the laminated material to form a welded portion; a cutting process step of forming staggered cuts in the laminated material in accordance with the welded portions, and processing the cutout portions of the sheet-like cushioning material, The cutting process is a process of punching out a sheet-like cushioning material, The manufacturing method includes a winding step of winding up the waste material around the sheet-like cushioning material.

2. The first substrate and the second substrate have a basis weight of 50 g / m 2 The method according to claim 1, wherein the nonwoven fabric is the above-mentioned nonwoven fabric.

3. a conveying means for continuously conveying a roll-shaped first substrate containing a thermoplastic resin and a roll-shaped second substrate containing a thermoplastic resin, and forming a laminated material by overlapping the first substrate and the second substrate; a welding means for welding the laminated material to form a welded portion; a cutting processing means for forming staggered cuts in the laminated material in accordance with the welded portions and processing the cutout portions of the sheet-like cushioning material, the cutting means punches out the sheet-like cushioning material, Furthermore, a winding machine that winds up the scrap material around the sheet-like cushioning material; and a container for storing the punched sheet-like cushioning material in a stacked sheet form.

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