WO2024244637A1 - Buffer product of multi-layer corrugated structure and preparation method therefor - Google Patents

Abstract

The present invention relates to the technical field of buffer structures. Disclosed is a multi-layer corrugated structure, comprising a plurality of corrugated plates, wherein each corrugated plate comprises a plurality of crest bulges, a trough depression is formed between every two adjacent crest bulges, and various corrugated plates are stacked to form a multi-layer corrugated structure with a certain thickness. The multi-layer corrugated structure comprises an outer corrugated layer located outside, and an inner corrugated layer wrapping the outer corrugated layer. According to the multi-layer corrugated structure, when a product is impacted, the outer corrugated layer located outside can be impacted first and deforms to absorb energy, and when an impact force is large, the outer corrugated layer abuts against the inner corrugated layer located inside, the inner corrugated layer has a certain elasticity compared with the outer corrugated layer, while the supporting performance of the inner corrugated layer is better than that of the outer corrugated layer, thereby further absorbing the resulting impact, achieving buffer and protection effects, and reducing damage to the product due to the impact.

Description

A multi-layer corrugated structure cushioning product and preparation method thereof Technical Field

The invention relates to the technical field of buffer structures, in particular to a multi-layer corrugated structure and a buffer product using the structure.

Background Art

Buffer structures are widely used in life. All kinds of products need to use this structure when they are transported and packaged to protect the products (such as tables, chairs, benches, electrical appliances, etc.) to avoid or reduce external impact forces, thereby ensuring the integrity of the products.

Existing cushioning and protection products are mostly made of plastic or foam materials. Foam materials are the most common, but their resilience is not very good. Buffering and protection products made of plastic will pollute the environment because plastic is difficult to degrade. At the same time, plastic is prone to static electricity during transportation, which makes it difficult to use multi-layer corrugated structures made of plastic to protect some precision instruments from falling.

Technical issues

Buffer structures are widely used in life. All kinds of products need to use this structure when they are transported and packaged to protect the products (such as tables, chairs, benches, electrical appliances, etc.) to avoid or reduce external impact forces, thereby ensuring the integrity of the products.

Existing cushioning and protection products are mostly made of plastic or foam materials. Foam materials are the most common, but their resilience is not very good. Buffering and protection products made of plastic will pollute the environment because plastic is difficult to degrade. At the same time, plastic is prone to static electricity during transportation, which makes it difficult to use multi-layer corrugated structures made of plastic to protect some precision instruments.

Technical Solutions

The present invention provides a multi-layer corrugated structure with good cushioning performance, which helps to solve the problem mentioned in the above background technology that the existing products for cushioning protection are mostly made of plastic or foam materials. Foam materials are the most common, but their own resilience is not very good. Buffering protection products made of plastic will pollute the environment because plastic is difficult to degrade. At the same time, static electricity is easily generated during the transportation of plastic, which makes it difficult to use the multi-layer corrugated structure made of plastic to protect some precision instruments.

The present invention provides the following technical solutions: a multi-layer corrugated structure, comprising a plurality of corrugated plates, each of which comprises a plurality of wave crest protrusions, and a wave valley is formed between two adjacent wave crest protrusions;

The corrugated plates are stacked on each other to form a multi-layer corrugated structure with a certain thickness;

The multi-layer corrugated structure includes an outer corrugated layer located outside and an inner corrugated layer inside the outer corrugated layer.

As an optional solution of the multi-layer corrugated structure of the present invention, the height of the corrugated plate crests of the outer corrugated layer is greater than the height of the corrugated plate crests of the inner corrugated layer.

As an optional solution of the multi-layer corrugated structure of the present invention, wherein: the corrugated plates in the outer corrugated layer include an upper corrugated outer plate and a lower corrugated outer plate;

The corrugated plates in the inner corrugated layer include a third upper corrugated inner plate and a third lower corrugated inner plate, the trough of the third upper corrugated inner plate is connected to the crest of the third lower corrugated inner plate, the trough of the upper corrugated outer plate abuts against the trough of the third upper corrugated inner plate, and the crest of the lower corrugated outer plate abuts against the crest of the third lower corrugated inner plate;

The distance between two adjacent wave crest protrusions of the upper corrugated outer plate is equal to the distance between two adjacent wave crest protrusions of the third upper corrugated inner plate.

As an optional solution of the multi-layer corrugated structure of the present invention, a partition plate is also installed between the third upper corrugated inner plate and the third lower corrugated inner plate;

The trough of the third upper corrugated inner plate is concavely fixedly connected to one side of the partition plate, and the crest of the third lower corrugated inner plate is convexly fixedly connected to the other side of the partition plate.

As an optional solution of the multi-layer corrugated structure described in the present invention, the trough of the upper corrugated outer plate is fixedly connected to the trough of the third upper corrugated inner plate, and the crest of the lower corrugated outer plate is fixedly connected to the crest of the third lower corrugated inner plate.

As an optional solution of the multi-layer corrugated structure of the present invention, the spacing between the corrugated plate crests of the outer corrugated layer is greater than the spacing between the corrugated plate crests of the inner corrugated layer.

As an optional solution of the multi-layer corrugated structure of the present invention, wherein: the corrugated plates in the outer corrugated layer include an upper corrugated outer plate and a lower corrugated outer plate;

The corrugated plates in the inner corrugated layer include a first upper corrugated inner plate and a first lower corrugated inner plate, the trough of the first upper corrugated inner plate is connected to the crest of the first lower corrugated inner plate, the trough of the upper corrugated outer plate abuts against the trough of the first upper corrugated inner plate, and the crest of the lower corrugated outer plate abuts against the crest of the first lower corrugated inner plate;

The spacing between two adjacent troughs of the upper corrugated outer plate is twice the spacing between two adjacent troughs of the first upper corrugated inner plate, and the spacing between two adjacent crests of the lower corrugated outer plate is twice the spacing between two adjacent crests of the first lower corrugated inner plate.

As an optional solution of the multi-layer corrugated structure of the present invention, wherein: the corrugated plates in the outer corrugated layer include an upper corrugated outer plate and a lower corrugated outer plate;

The corrugated plates in the inner corrugated layer include a second upper corrugated inner plate and a second lower corrugated inner plate, the trough of the second upper corrugated inner plate is connected to the crest of the second lower corrugated inner plate, the trough of the upper corrugated outer plate abuts against the trough of the second upper corrugated inner plate, and the crest of the lower corrugated outer plate abuts against the crest of the second lower corrugated inner plate;

The distance between two adjacent troughs of the upper corrugated outer plate is the distance between several troughs of the second upper corrugated inner plate, and the distance between two adjacent peaks of the lower corrugated outer plate is the distance between several peaks of the second lower corrugated inner plate.

Beneficial Effects

The present invention has the following beneficial effects:

1. For this multi-layer corrugated structure, when the product is impacted, the outer corrugated layer located on the outside will be impacted first and deform to absorb energy. When the impact force is large, the outer corrugated layer will collide with the inner corrugated layer located inside. Compared with the outer corrugated layer, the inner corrugated layer not only has a certain elasticity, but also has better supporting performance than the outer corrugated layer, thereby further absorbing the impact, thereby achieving buffering and protection, and reducing the damage caused by the impact of the product.

2. For the multi-layer corrugated structure, when the upper corrugated outer plate and/or the lower corrugated outer plate are subjected to external impact, the upper corrugated outer plate and/or the lower corrugated inner plate will deform and press toward the third upper corrugated inner plate and/or the third lower corrugated inner plate. The deformation of the upper corrugated outer plate and/or the lower corrugated outer plate will absorb part of the energy to buffer the external impact. When the external impact is too large, the crest protrusion of the upper corrugated outer plate will contact the crest protrusion of the third upper corrugated inner plate. The third upper corrugated inner plate will cooperate with the upper corrugated outer plate to absorb the external impact force to protect the transported products.

3. Compared with the upper corrugated outer plate and the lower corrugated outer plate, the corrugation spacing of the first upper corrugated inner plate, the first lower corrugated inner plate, the second upper corrugated inner plate and the second lower corrugated inner plate of the multi-layer corrugated structure is finer, which makes the inner corrugated layer have better compressive resistance and can absorb more impact energy generated by the outside world, and is used for buffering and protecting the products that need to be protected.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of Embodiment 1 of the present invention.

FIG. 2 is a schematic diagram of the structure of the present invention that is deformed under pressure.

FIG3 is a schematic diagram of the structure of Embodiment 2 of the present invention.

FIG. 4 is a schematic diagram of the structure of Embodiment 3 of the present invention.

FIG. 5 is an analytical diagram of the number of roller teeth in the production process of the present invention.

FIG. 6 is a schematic diagram of production process embodiment 1 of the present invention.

FIG. 7 is a schematic diagram of Example 2 of the production process of the present invention.

[Corrected 27.05.2024 in accordance with Article 91]
FIG8 is a schematic diagram of Example 2 of the production process of the present invention.

In the figure: 1, upper corrugated outer plate, 11, lower corrugated outer plate, 2, first upper corrugated inner plate, 21, first lower corrugated inner plate, 3, second upper corrugated inner plate, 31, second lower corrugated inner plate, 4, third upper corrugated inner plate, 41, third lower corrugated inner plate, 5, partition plate.

Embodiments of the present invention

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

A multi-layer corrugated structure comprises a plurality of corrugated plates, each of which comprises a plurality of wave crests and a wave valley is formed between two adjacent wave crests;

The corrugated plates are stacked on each other to form a multi-layer corrugated structure with a certain thickness;

The multi-layer corrugated structure comprises an outer corrugated layer located outside and an inner corrugated layer wrapped inside the outer corrugated layer.

It should be noted that the material suitable for the corrugated plate structure is a degradable sheet material, such as paper, PLA, PBAT, metal sheet, or a degradable sheet material made of grass, wood, bamboo, etc. The multi-layer corrugated structure can be used to wrap and protect various products, and can also be used as a buffer inside the product, for example, as a buffer or spring sheet component for various instruments, seats, automotive products, etc. When the product is impacted, the outer corrugated layer located on the outside will be impacted first and deform to absorb energy. When the impact force is large, the outer corrugated layer will contact the inner corrugated layer located inside. Compared with the outer corrugated layer, the inner corrugated layer not only has a certain elasticity, but also has better supporting performance than the outer corrugated layer, thereby further absorbing the impact, thereby achieving a buffering and protective effect, and reducing the damage to the product caused by the impact.

The height of the corrugated plate wave crest protrusions in the outer corrugated layer is greater than the height of the inner corrugated plate wave crest protrusions in the inner corrugated layer.

Example 1

1-2 , the corrugated plates in the outer corrugated layer include an upper corrugated outer plate 1 and a lower corrugated outer plate 11 ;

The corrugated plates in the inner corrugated layer include a third upper corrugated inner plate 4 and a third lower corrugated inner plate 41, the trough concave of the third upper corrugated inner plate 4 is connected to the crest convex of the third lower corrugated inner plate 41, the trough concave of the upper corrugated outer plate 1 abuts against the trough concave of the third upper corrugated inner plate 4, and the crest convex of the lower corrugated outer plate 11 abuts against the crest convex of the third lower corrugated inner plate 41;

The distance between two adjacent wave crest protrusions of the upper corrugated outer plate 1 is equal to the distance between two adjacent wave crest protrusions of the third upper corrugated inner plate 4 .

In this embodiment, each wave crest protrusion in the upper corrugated outer plate 1 contains a wave crest protrusion of the third upper corrugated inner plate 4, and each wave crest protrusion in the lower corrugated outer plate 11 contains a wave crest protrusion of the third lower corrugated inner plate 41. When the upper corrugated outer plate 1 and/or the lower corrugated outer plate 11 are subjected to external impact, the upper corrugated outer plate 1 and/or the lower corrugated outer plate 11 will deform and press toward the third upper corrugated inner plate 4 and/or the third lower corrugated inner plate 41, and the upper corrugated outer plate 1 and/or the lower corrugated outer plate 11 The deformation will absorb part of the energy to buffer the external impact. When the external impact is too large, as shown in Figure 2, the crest of the upper corrugated outer plate 1 will collide with the crest of the third upper corrugated inner plate 4, and the trough of the upper corrugated outer plate 1 will deviate from the trough of the third upper corrugated inner plate 4. At this time, the third upper corrugated inner plate 4 will cooperate with the upper corrugated outer plate 1 to absorb the external impact force to protect the transported products. When the external impact force is removed, the corrugated plates will recover.

The upper corrugated outer plate 1 has the same structural dimensions as the lower corrugated outer plate 11 , and the third upper corrugated inner plate 4 has the same structural dimensions as the third lower corrugated inner plate 41 .

Furthermore, a partition plate 5 is installed between the third upper corrugated inner plate 4 and the third lower corrugated inner plate 41;

The trough of the third upper corrugated inner plate 4 is fixedly connected to one side of the partition plate 5, and the crest of the third lower corrugated inner plate 41 is fixedly connected to the other side of the partition plate 5. The partition plate 5 is provided to improve the overall stability of the multi-layer corrugated structure.

Optionally, the trough of the upper corrugated outer plate 1 is fixedly connected to the trough of the third upper corrugated inner plate 4, and the crest of the lower corrugated outer plate 11 is fixedly connected to the crest of the third lower corrugated inner plate 41.

[Corrected 27.05.2024 in accordance with Article 91]
The above-mentioned fixed connection method includes bonding, snap connection, locking, etc. The contact method between the trough of the upper corrugated outer plate 1 and the trough of the third upper corrugated inner plate 4 is fixed connection and/or movable connection, that is, each trough of the upper corrugated outer plate 1 and the third upper corrugated inner plate 4 is fixedly connected, or a number of movably connected troughs are spaced between every two fixedly connected troughs; the contact method between the crest of the lower corrugated outer plate 11 and the crest of the third lower corrugated inner plate 41 is fixed connection and/or movable connection, that is, each crest of the lower corrugated outer plate 11 and the third lower corrugated inner plate 41 is fixedly connected, or a number of movably connected crests are spaced between every two fixedly connected crests;

The upper corrugated outer plate 1 and the third upper corrugated inner plate 4 are connected into a whole by a fixed connection, and the lower corrugated outer plate 11 and the third lower corrugated inner plate 41 are connected into a whole, and the crests and troughs of the inner and outer corrugated plates are fixed, so that when receiving external force, the position of the corrugated plates is relatively fixed and the displacement and deformation are minimized as much as possible, which can ensure that the multi-layer corrugated structure is more stable, and has better compression resistance while producing a buffering effect;

By setting a plurality of movable connection points between every two fixed connection points between the upper corrugated outer plate 1 and the third upper corrugated inner plate 4, and between the lower corrugated outer plate 11 and the third lower corrugated inner plate 41 according to predetermined requirements, the positions of the inner and outer corrugated plates can be roughly fixed. However, when subjected to external force, the movable connection nodes enable the corrugated plates to obtain a larger avoidance space by moving their positions in a small range during the compression deformation process. As shown in FIG2 , this spatial avoidance makes the buffering performance of the structure better.

Example 2

Referring to FIG. 3 , the spacing between the wave crests of the inner corrugated plate of the outer buffer inner corrugated layer is greater than the spacing between the wave crests of the inner corrugated plate of the inner corrugated layer.

The corrugated plates in the outer corrugated layer include an upper corrugated outer plate 1 and a lower corrugated outer plate 11;

The corrugated plates in the inner corrugated layer include a first upper corrugated inner plate 2 and a first lower corrugated inner plate 21, the trough of the first upper corrugated inner plate 2 is connected to the crest of the first lower corrugated inner plate 21, the trough of the upper corrugated outer plate 1 abuts against the trough of the first upper corrugated inner plate 2, and the crest of the lower corrugated outer plate 11 abuts against the crest of the first lower corrugated inner plate 21;

The distance between two adjacent wave crest protrusions of the upper corrugated outer plate 1 is the sum of the distances between two adjacent wave crest protrusions of the first upper corrugated inner plate 2 .

The first upper corrugated inner plate 2 and the first lower corrugated inner plate 21 have the same structural dimensions.

Example 3

Referring to FIG4 , the corrugated plates in the outer corrugated layer include an upper corrugated outer plate 1 and a lower corrugated outer plate 11 ;

The corrugated plates in the inner corrugated layer include a second upper corrugated inner plate 3 and a second lower corrugated inner plate 31, the trough concave of the second upper corrugated inner plate 3 is connected to the crest convex of the second lower corrugated inner plate 31, the trough concave of the upper corrugated outer plate 1 abuts against the trough concave of the second upper corrugated inner plate 3, and the crest convex of the lower corrugated outer plate 11 abuts against the crest convex of the second lower corrugated inner plate 31;

The spacing between two adjacent wave crest ridges of the upper corrugated outer plate 1 is the sum of the spacing between three adjacent wave crest ridges of the second upper corrugated inner plate 3. In actual use, the spacing between two adjacent wave crest ridges of the upper corrugated outer plate 1 can also be the sum of the spacing between several adjacent wave crest ridges of the second upper corrugated inner plate 3. FIG4 shows only one example of this embodiment.

The second upper corrugated inner plate 3 and the second lower corrugated inner plate 31 have the same structural dimensions.

In summary:

For the structures in Example 2 and Example 3, in these two embodiments, compared with the upper corrugated outer plate 1 and the lower corrugated outer plate 11, the corrugation spacing of the first upper corrugated inner plate 2, the first lower corrugated inner plate 21, the second upper corrugated inner plate 3 and the second lower corrugated inner plate 31 is finer, which makes the inner corrugated layer have better compressive resistance and can absorb more impact energy generated by the outside world, which is used for buffering and protecting the products that need to be protected.

In addition, the raw materials used to make corrugated boards can be smooth materials, such as kraft paper, straw pulp paper, PLA or PBAT extruded sheets, etc., or sheets with regular or irregular concave-convex patterns. Through its regular or irregular concave-convex patterns, first, the friction of the corrugated board can be increased through the concave-convex surface. When the corrugated board is used as a cushioning product, it can also effectively fix the position of the packaging to a certain extent, because the friction on the surface of the corrugated board prevents it from moving at will during transportation, which can better protect the product; second, the concave-convex patterns on the surface of the corrugated board can increase the spatial avoidance effect of the corrugated board, thereby obtaining better cushioning properties.

Since the multi-layer corrugated board is a brand-new product structure, the production process of the multi-layer corrugated board is disclosed, and the processes in the production process include at least one of the following: unwinding, conveying, humidifying, heating, shaping, core layer shaping, drying, trimming, positioning, and gluing;

The positioning process positions the peaks and troughs between the two adjacent layers of corrugated plates according to a predetermined position relationship to ensure that the peaks and troughs of the two adjacent layers of corrugated plates are set according to the predetermined positions. For specific operation methods, please refer to Figures 5-7. Figure 5 shows the tooth position relationship in the production process when the number of teeth of the shaping roller is odd and even, that is, when the number of teeth of the roller is an even number, the teeth of the roller correspond to each other up and down, and the position relationship of the corrugated plates shaped from top to bottom is that the trough of the upper corrugated plate is opposite to the peak of the lower corrugated plate; when the number of teeth of the roller is an odd number, the teeth of the roller are opposite to each other up and down, and the position relationship of the corrugated plates shaped from top to bottom is that the trough of the upper corrugated plate is opposite to the trough of the lower corrugated plate. As shown in Figure 6, the expected relationship between the upper and lower corrugated plates is achieved by adjusting the number of roller teeth, but the rollers need to mesh with each other to produce a better shaping effect on the sheet. Therefore, the upper and lower rollers use teeth of the same size (or a completely meshing size). Therefore, this production process is only applicable to the case where the waveform size of the upper and lower corrugated plates is the same.

[Corrected 27.05.2024 in accordance with Article 91]
When the sizes of the upper and lower corrugated plates are different, the production process diagram shown in Figure 7-8 is adopted, that is, two rollers are used as a group to shape a layer of corrugated plate, the meshing sizes of the rollers in the same group are meshed and matched, the meshing sizes of the rollers in different groups can be the same or different, and the positions of the rollers in different groups can be adjusted. The position adjustment of the rollers is based on the preset positional relationship between the upper and lower corrugated plates. The predetermined positional relationship between the corrugated plates of different layers can be achieved by setting the position of the rollers.

Among them, the roller is a hollow structure with glue installed inside. The roller is provided with glue outlet holes according to predetermined requirements. The glue outlet holes can be a long strip or small dots (glue point type). The gluing process is used on the corrugated plate, and the corrugated plate is glued according to predetermined gluing requirements, such as gluing at each crest or trough position, or gluing at intervals of several crests or troughs. The gluing and shaping process are carried out synchronously and/or asynchronously, that is, a glue outlet device is provided on the roller that shapes the waveform of the corrugated plate through the meshing waveform of the roller, so that the gluing and shaping processes can be carried out synchronously. For example, when the corrugated plate needs multiple groups of rollers to shape it, it is also possible to choose to add the gluing process after the corrugated shape of the corrugated plate is completely finalized.

It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims (11)

A multi-layer corrugated structure, comprising a plurality of corrugated plates, wherein each corrugated plate comprises a plurality of wave crests, and a wave trough is formed between two adjacent wave crests; The corrugated plates are stacked on each other to form a multi-layer corrugated structure having a thickness; The multi-layer corrugated structure includes an outer corrugated layer located outside and an inner corrugated layer inside the outer corrugated layer. The multi-layer corrugated structure according to claim 1 is characterized in that the troughs of the outer corrugated layer are in contact with the troughs of the inner corrugated layer, a predetermined distance is left between the crests of the outer corrugated layer and the crests of the inner corrugated layer, and the distance is smaller than the height of the outer corrugated layer. The multi-layer corrugated structure according to claim 1 is characterized in that: the corrugated plates of the multi-layer corrugated structure include an upper corrugated outer plate (1), a lower corrugated outer plate (11), a third upper corrugated inner plate (4) and a third lower corrugated inner plate (41), the trough of the third upper corrugated inner plate (4) is connected to the crest of the third lower corrugated inner plate (41), the trough of the upper corrugated outer plate (1) abuts against the trough of the third upper corrugated inner plate (4), and the crest of the lower corrugated outer plate (11) abuts against the crest of the third lower corrugated inner plate (41); The spacing between two adjacent troughs of the upper corrugated outer plate (1) is equal to the spacing between two adjacent troughs of the third upper corrugated inner plate (4); and the spacing between two adjacent peaks of the lower corrugated plate (11) is equal to the spacing between two adjacent troughs of the third lower corrugated inner plate (41). The multi-layer corrugated structure according to claim 3 is characterized in that a partition plate (5) is further installed between the third upper corrugated inner plate (4) and the third lower corrugated inner plate (41); The trough of the third upper corrugated inner plate (4) is fixedly connected to one side of the partition plate (5), and the crest of the third lower corrugated inner plate (41) is fixedly connected to the other side of the partition plate (5). The multi-layer corrugated structure according to claim 4 is characterized in that the troughs of the upper corrugated outer plate (1) are in contact with the troughs of the third upper corrugated inner plate (4), and the peaks of the lower corrugated outer plate (11) are in contact with the peaks of the third lower corrugated inner plate (41). The multi-layer corrugated structure according to claim 3 is characterized in that: the contact mode between the trough of the upper corrugated outer plate (1) and the trough of the third upper corrugated inner plate (4) is fixedly connected and/or movably connected, that is, each trough of the upper corrugated outer plate (1) and the third upper corrugated inner plate (4) is fixedly connected, or a plurality of movably connected troughs are spaced between every two fixedly connected troughs; the contact mode between the peak of the lower corrugated outer plate (11) and the peak of the third lower corrugated inner plate (41) is fixedly connected and/or movably connected, that is, each peak of the lower corrugated outer plate (11) and the third lower corrugated inner plate (41) is fixedly connected, or a plurality of movably connected peaks are spaced between every two fixedly connected peaks. The multi-layer corrugated structure according to claim 3 is characterized in that: the corrugated plates in the multi-layer corrugated structure include an upper corrugated outer plate (1), a lower corrugated outer plate (11), a first upper corrugated inner plate (2) and a first lower corrugated inner plate (21); The concave trough of the first upper corrugated inner plate (2) is connected to the convex crest of the first lower corrugated inner plate (21), the concave trough of the upper corrugated outer plate (1) abuts against the concave trough of the first upper corrugated inner plate (2), and the convex crest of the lower corrugated outer plate (11) abuts against the convex crest of the first lower corrugated inner plate (21); The spacing between two adjacent troughs of the upper corrugated outer plate (1) is twice the spacing between two adjacent troughs of the first upper corrugated inner plate (2); and the spacing between two adjacent crests of the lower corrugated outer plate (11) is twice the spacing between two adjacent crests of the first lower corrugated inner plate (21). The multi-layer corrugated structure according to claim 3 is characterized in that: the corrugated plates in the corrugated outer corrugated layer include an upper corrugated outer plate (1), a lower corrugated outer plate (11), a second upper corrugated inner plate (3) and a second lower corrugated inner plate (31); The concave trough of the second upper corrugated inner plate (3) is connected to the convex crest of the second lower corrugated inner plate (31), the concave trough of the upper corrugated outer plate (1) abuts against the concave trough of the second upper corrugated inner plate (3), and the convex crest of the lower corrugated outer plate (11) abuts against the convex crest of the second lower corrugated inner plate (31); The spacing between two adjacent troughs of the upper corrugated outer plate (1) is the spacing between a plurality of troughs of the second upper corrugated inner plate (3); and the spacing between two adjacent peaks of the lower corrugated outer plate (11) is the spacing between a plurality of troughs of the second lower corrugated inner plate (31). A corrugated plate, characterized in that the corrugated plate has predetermined patterns, the patterns include regular or irregular concave and convex patterns, and the corrugated plate is used in the multi-layer corrugated structure described in any one of claims 1 to 8. A cushioning product with a multi-layer corrugated structure, characterized in that the cushioning product adopts the multi-layer corrugated structure as described in any one of claims 1 to 9. A production process for a multi-layer corrugated structure, characterized in that the processes in the production process include at least one of the following: unwinding, conveying, humidifying, heating, shaping, core layer shaping, drying, trimming, positioning, and gluing; The positioning process positions the crests and troughs between the two adjacent layers of corrugated plates according to a predetermined position relationship, so as to ensure that the crests and troughs of the two adjacent layers of corrugated plates are set according to the predetermined positions; The gluing process is applied to the corrugated board, and the corrugated board is glued according to predetermined gluing requirements. The gluing is performed synchronously and/or asynchronously with the shaping process. Type claim 1 here.