High-folding-strength and high-regeneration craft paper

Abstract

The utility model relates to the technical field of packaging, and discloses a high-folding-strength high-regeneration craft paper which comprises paper, a top wear-resistant layer is arranged in the paper, a middle core fireproof layer is fixedly connected to the bottom end of the top wear-resistant layer, a first reinforcing core layer is fixedly connected to the bottom end of the middle core fireproof layer, and a second reinforcing core layer is fixedly connected to the bottom end of the middle core fireproof layer. The bottom end of the first reinforcing core layer is fixedly connected with a plurality of second reinforcing core layers, the close sides of two of the second reinforcing core layers are fixedly connected with adhesive glue layers, the bottom end of the first reinforcing core layer is fixedly connected with a plurality of pressed paper pulp layers, and the bottom ends of the pressed paper pulp layers are fixedly connected with waterproof layers. The bottom end of the waterproof layer is fixedly connected with a damp-proof layer, and the bottom end of the damp-proof layer is fixedly connected with an antibacterial layer. According to the kraft linerboard, the strength and the toughness of the kraft linerboard are enhanced, the service life of the kraft linerboard is prolonged, and the problems that the kraft linerboard is easy to damage after being folded for multiple times in the using process and the folding resistance needs to be improved are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to a highly recycled kraft paper with high folding resistance. Background Art

[0002] Cardboard refers to paper weighing more than 120 grams per square meter. It is used for postcards, cards, album backing paper, etc. The paper surface is delicate and smooth, strong and wear-resistant. Kraft cardboard, also known as boxboard, is mainly made into corrugated paperboard after bonding with corrugated cardboard. It is used to package household appliances, daily necessities, needle-cotton fabrics, cultural supplies, and outer packaging of Chinese and Western medicines. The raw materials used for kraft cardboard include sulfate wood pulp, waste hemp pulp, cotton stalk pulp, waste paper pulp, rice and wheat straw pulp, etc. The requirements for the boxboard are that it should have certain compressive strength, toughness and tear resistance, tear resistance, smooth paper surface, and no pulp lumps, knots, and uneven appearance of paper diseases. Therefore, the texture of kraft paper must be tough, with high burst resistance, ring crush strength and tear resistance. In addition, it must also have high water resistance.

[0003] After searching, the Chinese patent with announcement number: CN207619747U discloses a kraft paper in the above document, including a substrate layer, both sides of the substrate layer are provided with a fireproof nylon layer, and the side of the fireproof nylon layer away from the substrate layer is coated with a fireproof coating layer. The utility model has the following advantages and effects: the good fireproof effect of the fireproof coating layer is used as the first line of defense, and when the fireproof coating layer fails to work, the good fireproof effect of the fireproof nylon layer is used as the second line of defense; the good fireproof effect of the fireproof polystyrene particles can be used as the third line of defense, and finally the possibility of combustion of the kraft paper can be reduced.

[0004] The working principle of the above patent mentions that "the side of the fire retardant coating layer 3 away from the substrate layer 1 is coated with a waterproof coating layer 6, and the waterproof coating layer 6 is a single-component water-emulsion waterproof coating made of pure acrylic polymer emulsion as a base material and other additives. The waterproof film formed by the waterproof coating after curing has certain elongation, elasticity, plasticity, crack resistance, impermeability and weather resistance, and can play a waterproof, anti-seepage and protective role." However, although the above document solves the problem of flame retardancy of kraft paper, it does not solve the problem that kraft paperboard is easily damaged due to multiple folding during use and needs to improve its folding resistance. In view of the above problem, a high folding resistance and highly recycled kraft paperboard is proposed to solve the above problem. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a highly folding-resistant and highly recycled kraft paper, aiming to improve the problem in the prior art that paper is easily damaged after being folded multiple times.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A high-folding-resistance high-recycled kraft paper comprises paper, wherein a top wear-resistant layer is arranged inside the paper, a middle core fireproof layer is fixedly connected to the bottom end of the top wear-resistant layer, a first strengthening core layer is fixedly connected to the bottom end of the middle core fireproof layer, a plurality of second strengthening core layers are fixedly connected to the bottom end of the first strengthening core layer, wherein a bonding glue layer is fixedly connected to the adjacent sides of two second strengthening core layers, a plurality of pressed paper pulp layers are fixedly connected to the bottom end of the first strengthening core layer, a waterproof layer is fixedly connected to the bottom end of the pressed paper pulp layer, a moisture-proof layer is fixedly connected to the bottom end of the waterproof layer, an antibacterial layer is fixedly connected to the bottom end of the moisture-proof layer, and a texture component is arranged outside the paper;

[0008] As a further description of the above technical solution:

[0009] The texture component includes a top pattern and a bottom pattern, wherein the top pattern is arranged at the top end of the paper, and the bottom pattern is arranged at the bottom end of the paper;

[0010] As a further description of the above technical solution:

[0011] The bottom end of the first reinforcing core layer is fixedly connected to the top ends of the plurality of adhesive glue layers, wherein the bottom ends of the two pressed pulp layers are fixedly connected to the adjacent sides of the two adhesive glue layers, the bottom ends of the plurality of adhesive glue layers are fixedly connected to the top end of the waterproof layer, and the bottom ends of the plurality of the first reinforcing core layers are fixedly connected to the top end of the waterproof layer;

[0012] As a further description of the above technical solution:

[0013] The top wear-resistant layer is made of cellulose, and the core fireproof layer is made of phosphorus chloride;

[0014] As a further description of the above technical solution:

[0015] The first reinforcing core layer is made of high-strength cellulose pulp, and the second reinforcing core layer is made of fiber reinforcement material;

[0016] As a further description of the above technical solution:

[0017] The adhesive glue layer is a starch glue layer. The pressed pulp layer is a full wood pulp composite material;

[0018] As a further description of the above technical solution:

[0019] The waterproof layer is made of polyester fiber, and the moisture-proof layer is made of polyethylene film;

[0020] As a further description of the above technical solution:

[0021] The top pattern is made of a fine mesh pattern, and the bottom pattern is made of a fine concave-convex pattern.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, through the cooperation of paper, top wear-resistant layer, middle core fireproof layer, first reinforcing core layer, second reinforcing core layer and other components, the strength and toughness of kraft paper are enhanced, the service life of kraft paper is improved, and the problem that kraft paper is easily damaged due to multiple folding during use and the folding resistance needs to be improved is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of a high folding resistance and high recycled kraft paperboard proposed by the utility model;

[0025] Figure 2 This is a schematic diagram of the pressed pulp layer structure of a high folding endurance and high recycled kraft paperboard proposed by the utility model;

[0026] Figure 3 This is a schematic diagram of the top grain structure of a high folding resistance and high recycled kraft paperboard proposed by the utility model;

[0027] Figure 4 This is a schematic diagram of the shading structure of a highly folding-resistant and highly recycled kraft paperboard proposed by the utility model.

[0028] Legend:

[0029] 1. Paper; 2. Top wear-resistant layer; 3. Middle core fireproof layer; 4. First reinforced core layer; 5. Second reinforced core layer; 6. Adhesive glue layer; 7. Pressed pulp layer; 8. Waterproof layer; 9. Moisture-proof layer; 10. Antibacterial layer; 11. Top pattern; 12. Bottom pattern. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1-Figure 3The utility model provides an embodiment: a high-folding-resistance and high-recycled kraft paper, comprising paper 1, a top wear-resistant layer 2 is arranged inside the paper 1, the bottom end of the top wear-resistant layer 2 is fixedly connected with a middle core fireproof layer 3, the bottom end of the middle core fireproof layer 3 is fixedly connected with a first reinforcing core layer 4, the middle core fireproof layer 3 cooperates to connect the top wear-resistant layer 2 and the first reinforcing core layer 4, the bottom end of the first reinforcing core layer 4 is fixedly connected with a plurality of second reinforcing core layers 5, wherein the adjacent sides of two second reinforcing core layers 5 are fixedly connected with an adhesive glue layer 6, and the second reinforcing core layer 5 and the adhesive glue layer 6 are staggered and overlapped and fixed at the bottom of the first reinforcing core layer 4.

[0032] The bottom end of the first reinforced core layer 4 is fixedly connected with a plurality of pressed pulp layers 7, the bottom end of the pressed pulp layer 7 is fixedly connected with a waterproof layer 8, the pressed pulp layers 7 are staggeredly fixed at the top of the waterproof layer 8 and the bottom of the first reinforced core layer 4, the bottom end of the waterproof layer 8 is fixedly connected with a moisture-proof layer 9, the bottom end of the moisture-proof layer 9 is fixedly connected with an antibacterial layer 10, the moisture-proof layer 9 connects the waterproof layer 8 and the antibacterial layer 10, and a texture component is provided on the outside of the paper 1.

[0033] refer to Figure 2 The bottom end of the first reinforcing core layer 4 is fixedly connected to the top of multiple adhesive glue layers 6, the bottom ends of the two pressed pulp layers 7 are fixedly connected to the adjacent side of the two adhesive glue layers 6, the bottom ends of multiple adhesive glue layers 6 are fixedly connected to the top of the waterproof layer 8, the bottom ends of multiple first reinforcing core layers 4 are fixedly connected to the top of the waterproof layer 8, and the adhesive glue layer 6 connects the second reinforcing core layer 5 and the pressed pulp layer 7 to increase the degree of adhesion when the cardboard is pressed.

[0034] The top wear-resistant layer 2 is made of cellulose. Cellulose strengthens the connection of fibers in kraft paper and improves the strength of kraft paper. The core fireproof layer 3 is made of phosphorus chloride. Phosphorus chloride effectively slows down the spread of flames and improves the fireproof performance of kraft paper.

[0035] The first reinforcing core layer 4 is made of high-strength cellulose pulp. High-strength cellulose pulp has high strength and flexibility and can increase the folding resistance of kraft paper. The second reinforcing core layer 5 is made of fiber reinforcement. Adding fiber reinforcement to the pulp can enhance the fiber connectivity of kraft paper and improve its bending resistance.

[0036] The adhesive glue layer 6 is a starch glue layer, which has more internal particles but is low in price and can be used for bonding thick single-sided kraft paper and all-wood pulp kraft paper. The pressed pulp layer 7 is a composite material of all-wood pulp, which usually has higher purity and quality and can produce kraft paper of better quality.

[0037] The waterproof layer 8 is made of polyester fiber, which has high strength and wear resistance and can enhance the wear resistance of kraft paper. The moisture-proof layer 9 is made of polyethylene film, which is more environmentally friendly than other plastic waterproof materials, such as polyvinyl chloride (PVC), and has good waterproof performance and durability. The antibacterial layer 10 is made of silver ion material, which has strong antibacterial and bactericidal effects and can inhibit the growth of bacteria, fungi and viruses, and is often used to make antibacterial materials.

[0038] refer to Figure 4 The texture component includes a top pattern 11 and a bottom pattern 12. The top pattern 11 is arranged at the top of the paper 1, and the bottom pattern 12 is arranged at the bottom of the paper 1. The top pattern 11 is made of a fine mesh pattern. The fine mesh pattern can form tiny intersections on the surface, increase the surface strength, disperse the pressure during bending, and improve the bending resistance. The bottom pattern 12 is made of a micro-concave and convex pattern. The micro-concave and convex pattern can increase the flexibility and strength while maintaining the smoothness of the surface. This micro-concave and convex pattern can make the bending more uniform, reduce the local pressure during folding, and thus improve the bending resistance.

[0039] Working principle: The kraft paper is suitable for use in which the second reinforcing core layer 5, the adhesive glue layer 6, and the pressed pulp layer 7 in the paper are cross-stacked together, so the bonding strength of the paper can be increased when the paper is pressed, and the toughness of the paper can be increased. The material of the top wear-resistant layer 2 strengthens the connection of the internal fibers and increases the strength of the kraft paper. The core fireproof layer 3 increases the fireproof performance of the kraft paper. The waterproof layer 8 and the moisture-proof layer 9 are connected to protect the kraft paper from being environmentally friendly while enhancing the antibacterial ability of the kraft paper. Finally, the textures of the top grain 11 and the bottom grain 12 help the paper body to reduce local pressure when folded, thereby improving the bending resistance.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly folding-resistant and highly recycled kraft paper, comprising paper (1), characterized in that: The paper (1) is provided with a top wear-resistant layer (2) inside, the bottom end of the top wear-resistant layer (2) is fixedly connected to a core fireproof layer (3), the bottom end of the core fireproof layer (3) is fixedly connected to a first strengthening core layer (4), the bottom end of the first strengthening core layer (4) is fixedly connected to a plurality of second strengthening core layers (5), wherein adjacent sides of two second strengthening core layers (5) are fixedly connected to an adhesive glue layer (6), the bottom end of the first strengthening core layer (4) is fixedly connected to a plurality of pressed paper pulp layers (7), the bottom end of the pressed paper pulp layer (7) is fixedly connected to a waterproof layer (8), the bottom end of the waterproof layer (8) is fixedly connected to a moisture-proof layer (9), and the bottom end of the moisture-proof layer (9) is fixedly connected to an antibacterial layer (10), and the outside of the paper (1) is provided with a texture component.

2. The high folding endurance and high recycled kraft paper according to claim 1, characterized in that: The texture component comprises a top pattern (11) and a bottom pattern (12), wherein the top pattern (11) is arranged at the top end of the paper (1), and the bottom pattern (12) is arranged at the bottom end of the paper (1).

3. The high folding endurance and high recycled kraft paper according to claim 1, characterized in that: The bottom end of the first reinforcing core layer (4) is fixedly connected to the top ends of the plurality of adhesive glue layers (6), the bottom ends of the two pressed pulp layers (7) are fixedly connected to the adjacent sides of two of the adhesive glue layers (6), the bottom ends of the plurality of adhesive glue layers (6) are fixedly connected to the top end of the waterproof layer (8), and the bottom ends of the plurality of first reinforcing core layers (4) are fixedly connected to the top end of the waterproof layer (8).

4. The high folding endurance and high recycled kraft paper according to claim 1, characterized in that: The top wear-resistant layer (2) is made of cellulose material, and the core fireproof layer (3) is made of phosphorus chloride material.

5. The high folding endurance and high recycled kraft paper according to claim 1, characterized in that: The first reinforcing core layer (4) is made of high-strength cellulose pulp material, and the second reinforcing core layer (5) is made of a fiber reinforcement material.

6. The high folding endurance and high recycled kraft paper according to claim 1, characterized in that: The adhesive glue layer (6) is a starch glue layer, and the pressed paper pulp layer (7) is a full wood pulp composite material.

7. The high folding endurance and high recycled kraft paper according to claim 1, characterized in that: The waterproof layer (8) is made of polyester fiber, the moisture-proof layer (9) is made of polyethylene film, and the antibacterial layer (10) is made of silver ion material.

8. The high folding endurance and high recycled kraft paper according to claim 2, characterized in that: The top pattern (11) is made of a fine mesh pattern material, and the bottom pattern (12) is made of a fine concave-convex pattern material.

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