Waterproof composite corrugated board

Abstract

The waterproof composite corrugated board comprises an inner paper layer, a buffer layer, a reinforcing layer, a bonding layer and a waterproof layer which are sequentially arranged from inside to outside, a buffer paper core is arranged in the buffer layer, and the reinforcing layer comprises upper bonding paper, an upper paper core, connecting paper, a lower paper core and lower bonding paper which are sequentially arranged. The buffer paper core is arranged above the upper bonding paper, the bonding layer is arranged below the lower bonding paper, the bonding layer is made of release paper, and the waterproof layer is a polypropylene (PP) film. The corrugated board has the advantages that the corrugated board structure not only provides high strength, but also provides excellent waterproof performance, and meanwhile the corrugated board is convenient to recycle and reuse through the waterproof layer structure convenient to separate. The defect that an existing waterproof corrugated board is inconvenient to recycle or difficult to recycle is overcome, and recycling of resources is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to corrugated board relevant technical field, concretely is a waterproof composite corrugated board. BACKGROUND

[0002] The corrugated board comprises core layers and board layers. The core layers are wave-shaped plate bodies, and the board layers are flat plate bodies. The core layers and the board layers are connected together at intervals to form a corrugated board with strong impact and collision resistance. The corrugated board is a multi-layer adhesive paperboard, which is mainly used for manufacturing paper boxes, sandwichs of paper boxes and other packaging materials of fragile goods. However, the waterproof ability of the corrugated board in the prior art is poor. When the corrugated board is wetted by water, the corrugated board will be soft and collapsed, which seriously affects the use. However, the waterproof corrugated board in the prior art is made by a waterproof coating or other waterproof materials. The recycling of the corrugated board is greatly reduced due to the waterproof process, which is not conducive to the recycling of the corrugated board material and increases the use cost. SUMMARY

[0003] In view of the problem that the recycling of the corrugated board is greatly reduced due to the waterproof process, which is not conducive to the recycling of the corrugated board material and increases the use cost, the utility model discloses the following technical scheme:

[0004] A waterproof composite corrugated board comprises, from inside to outside, a paper layer, a buffer layer, a reinforcing layer, an adhesive layer and a waterproof layer. The buffer layer is provided with a buffer paper core. The reinforcing layer comprises, in sequence, an upper adhesive paper, an upper paper core, a connecting paper, a lower paper core and a lower adhesive paper. The buffer paper core is arranged above the upper adhesive paper. The lower adhesive paper is arranged below the adhesive layer. The adhesive layer is made of release paper. The waterproof layer is made of polypropylene (PP) film.

[0005] Further, the buffer paper core is adhered to the upper adhesive paper and the paper layer by starch glue. The upper adhesive paper, the upper paper core, the connecting paper, the lower paper core and the lower adhesive paper are adhered by starch glue.

[0006] Further, the buffer paper core is in U-shaped corrugated shape or UV-shaped corrugated shape. The upper paper core and the lower paper core are in UV-shaped or V-shaped corrugated shape, and the wave crests and wave troughs of the upper paper core and the lower paper core are arranged in opposite correspondence.

[0007] Further, the paper layer, the upper adhesive paper and the lower adhesive paper are made of kraft paper with a grammage of 250g / m 2 ~ 300g / m 2 .

[0008] Further, the connecting paper 5 has a grammage of 120g / m2 ~ 150 g / m 2 kraft paper.

[0009] Further, the ratio of the thickness of the buffer layer to the thickness of the reinforcing layer is 1:1~1.2.

[0010] Further, the release paper is compounded with the lower adhesive paper by hot pressing, and the polypropylene (PP) film is compounded with the release paper by hot pressing.

[0011] The corrugated paperboard structure of the utility model provides higher strength, meanwhile provides excellent waterproof performance, meanwhile, the corrugated paperboard of the utility model is convenient to recycle and reuse through the waterproof layer structure convenient to separate, overcomes the characteristics that the existing waterproof corrugated paperboard is inconvenient to recycle or difficult to recycle, is favorable to the repeated use of resources. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structural schematic diagram of the utility model;

[0013] In the drawing: 1 - inner paper layer, 2 - buffer layer, 3 - upper adhesive paper layer, 4 - upper paper core, 5 - connecting paper, 6 - lower paper core, 7 - lower adhesive paper, 8 - adhesive layer, 9 - waterproof layer. DETAILED DESCRIPTION

[0014] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0015] Combined with Figure 1 As shown in the figure:

[0016] A waterproof composite corrugated paperboard, comprising inner paper layer 1, buffer layer 2, reinforcing layer and adhesive layer 8 and waterproof layer 9 arranged in sequence from inside to outside, buffer paper core is arranged in the buffer layer 2, the buffer paper core is U-shaped or UV-shaped corrugated, which is used for providing corresponding buffer effect, the reinforcing layer is used for reinforcing the overall strength of the paperboard, the compression resistance, comprising upper adhesive paper 3, upper paper core 4, connecting paper 5, lower paper core 6 and lower adhesive paper 7 arranged in sequence, the upper paper core 4 and the lower paper core 6 are UV-shaped or V-shaped corrugated, and the wave crest and the wave trough of the upper paper core 4 and the lower paper core 6 are arranged in opposite state, so that the design can provide stronger support, thereby improving the compression strength and overall strength of the paperboard.

[0017] The upper adhesive paper 3 is provided with a buffer paper core, the lower adhesive paper 7 is provided with an adhesive layer 8, the buffer paper core is adhered to the upper adhesive paper 3 and the inner paper layer 1 through starch glue, the upper adhesive paper 3, the upper paper core 4, the connecting paper 5, the lower paper core 6 and the lower adhesive paper 7 are adhered through starch glue, and the green and environment-friendly starch glue is used for adhering, so that the corrugated paperboard can be recycled again.

[0018] The adhesive layer 8 is made of release paper, the waterproof layer 9 is made of polypropylene (PP) film, the release paper provides a corresponding basis for simple separation of the waterproof layer and the corrugated paperboard, so that the waterproof layer can be effectively separated from the corrugated paper during recycling and is not adhered.

[0019] The inner paper layer 1, the upper adhesive paper 3 and the lower adhesive paper 7 are made of kraft paper with a grammage of 250g / m 2 ~ 300g / m 2 , so that the adhesive strength and the kraft paper strength are in a proper range after being adhered.

[0020] The connecting paper 5 is kraft paper with a grammage of 120g / m 2 ~ 150g / m 2 , which is used for enhancing the internal connection strength of the reinforcing layer and improving the supportability and overall strength of the reinforcing layer.

[0021] The thickness ratio of the buffer layer 2 to the reinforcing layer is 1:1~1.2, so that the buffer capacity and the overall strength are in a proper range, and the overall characteristics of the paperboard are stable under the condition of the same thickness.

[0022] The release paper is compounded with the lower adhesive paper 7 through hot pressing, one side of the release paper is coated with silicon, and the other side is compounded with the lower adhesive paper, the hot pressing temperature is generally 100~140℃, the pressure is 2~5MPa, and the compounding time is 30~50s, the polypropylene (PP) film is compounded with the silicon-coated release paper through hot pressing, the adhesion is controlled, the hot pressing temperature is generally 120~160℃, the pressure is 2~5MPa, and the compounding time is 20~30s, no adhesive is used, so that the separation is simple, the corrugated paperboard can be recycled and reused, and a suitable adhesive facilitating separation can also be selected.

[0023] Working principle: the inner side of the corrugated board, namely the inner paper layer, is stressed, and a certain buffering capacity is obtained through the U-shaped or UV-shaped buffer paper core, the reinforcing layer provides corresponding compression resistance due to the existence of the connecting paper and the upper and lower paper cores arranged oppositely, and the compression resistance structure formed by the reinforcing layer provides corresponding compression resistance, the smaller corrugated shape deformation mode obtains a certain buffering capacity while providing sufficient supporting strength, and the outer waterproof layer provides corresponding waterproof properties, the polypropylene film of the waterproof layer is compounded with the release paper and the lower adhesive paper to avoid the problems that the waterproof layer is difficult to separate from the corrugated board and is not convenient for recycling of the corrugated board, the waterproof properties are provided while the corrugated board is separated and recycled, and the recycling ability of resources can be effectively improved.

[0024] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the elements of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0025] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A waterproof composite corrugated paperboard, characterized by: The inner paper layer (1), the buffer layer (2), the reinforcing layer and the adhesive layer (8) and the waterproof layer (9) are sequentially arranged from inside to outside, the buffer paper core is arranged in the buffer layer (2), the reinforcing layer comprises the upper adhesive paper (3), the upper paper core (4), the connecting paper (5), the lower paper core (6) and the lower adhesive paper (7) which are sequentially arranged, the buffer paper core is arranged above the upper adhesive paper (3), the adhesive layer (8) is arranged below the lower adhesive paper (7), the material of the adhesive layer (8) is release paper, and the waterproof layer (9) is a polypropylene (PP) film.

2. A waterproof composite corrugated paperboard according to claim 1, characterized in that: The buffer paper core is adhered to the upper adhesive paper (3) and the inner paper layer (1) through starch glue, and the upper adhesive paper (3), the upper paper core (4), the connecting paper (5), the lower paper core (6) and the lower adhesive paper (7) are adhered through starch glue.

3. A waterproof composite corrugated paperboard according to claim 1, characterized in that: The buffer paper core is in U-shaped or UV-shaped corrugated form, the upper paper core (4) and the lower paper core (6) are in UV-shaped or V-shaped corrugated form, and the wave crests and wave troughs of the upper paper core (4) and the lower paper core (6) are oppositely arranged.

4. A waterproof composite corrugated paperboard according to claim 1, characterized in that: The inner paper layer (1) and the upper adhesive paper (3) and the lower adhesive paper (7) are kraft paper materials, with a grammage of 250g / m 2 ~300g / m 2 .

5. A waterproof composite corrugated paperboard according to claim 1, characterized in that: The connecting paper (5) is a kraft paper of 120 g / m 2 ~ 150 g / m 2 2.

6. A waterproof composite corrugated paperboard according to claim 1, characterized in that: The thickness ratio of the buffer layer (2) to the reinforcing layer is 1:1-1.

2.

7. A waterproof composite corrugated paperboard according to claim 1, characterized in that: The release paper is compounded with the lower adhesive paper (7) through hot pressing, and the polypropylene (PP) film is compounded with the release paper through hot pressing.

Images