Pressure-resistant corrugated cardboard and production process thereof

Abstract

The present application relates to the technical field of packaging materials, and specifically discloses a pressure-resistant corrugated cardboard and its production process. The pressure-resistant corrugated cardboard of the present application includes a first face paper layer, a second face paper layer, and a core paper layer; and the first face paper layer, the second face paper layer, and the core paper layer are all made of corrugated base paper; the raw materials of the corrugated base paper include pulp, sisal staple fiber, modified sepiolite, corn modified starch, nano-gas-phase silica, organic bentonite, acrylate, xanthan gum, dispersant, mildew inhibitor, etc.; the production process of the pressure-resistant corrugated cardboard of the present application includes the following steps: bonding the corrugated base paper to form a core paper layer; and pasting the corrugated base paper on both sides of the core paper layer to form a first face paper layer and a second face paper layer, thereby obtaining the pressure-resistant corrugated cardboard. The corrugated cardboard of the present application has significant pressure resistance and antibacterial and mildew resistance, and has broad market prospects.

Description

Technical Field

[0001] The present application relates to the technical field of packaging materials, and more specifically, to a pressure-resistant corrugated cardboard and a production process thereof. Background Art

[0002] Corrugated paper offers advantages such as low cost, light weight, ease of processing, high strength, excellent printability, and convenient storage and handling. Furthermore, over 80% of corrugated paper is recyclable. Consequently, it is increasingly popular with packaging companies and widely used for packaging, storage, and transportation of food and digital products. Corrugated cardboard consists of at least one layer of corrugated paper bonded together with a layer of containerboard, and exhibits excellent elasticity and extensibility. To enhance its pressure resistance, it is typically constructed with multiple layers separated by a core paper. These layers are then glued together to form a finished product. For storage and transportation of specialized items, the number of layers is typically increased to seven or more. While this cardboard structure clearly increases in strength as the thickness of the corrugated cardboard increases, increasing pressure resistance solely by increasing the number of layers wastes resources and reduces the space available for packaging products.

[0003] Therefore, there is an urgent need to propose a pressure-resistant corrugated cardboard and its production process to effectively enhance the pressure resistance of the corrugated cardboard and expand the application prospects of the corrugated cardboard. Summary of the Invention

[0004] In order to solve the problem of poor pressure resistance of existing corrugated cardboard, the present application provides a pressure-resistant corrugated cardboard and a production process thereof.

[0005] In the first aspect, the present application provides a pressure-resistant corrugated cardboard, which adopts the following technical solution:

[0006] A pressure-resistant corrugated paperboard comprises a first surface paper layer, a second surface paper layer, and a core paper layer arranged between the first surface paper layer and the second surface paper layer;

[0007] The first face paper layer, the second face paper layer and the core paper layer are all made of corrugated paper;

[0008] The corrugated base paper comprises the following raw materials in parts by weight: 60-100 parts of pulp, 20-30 parts of sisal staple fibers, 11-15 parts of modified sepiolite, 8-12 parts of modified corn starch, 5-7 parts of nano-fumed silica, 6-10 parts of organic bentonite, 1-4 parts of acrylate, 2-4 parts of xanthan gum, 1-3 parts of dispersant, and 1-4 parts of mildew inhibitor.

[0009] Through the above technical method, the corrugated paper of the present application is composed of a first paper layer, a second paper layer and a core paper layer between the first and second paper layers, and has a stable and firm spatial structure; and the first paper layer, the second paper layer and the core paper layer are all made of corrugated base paper, and the raw materials of the corrugated base paper include pulp, sisal staple fiber, modified sepiolite, corn modified starch, nano-gas-phase silica, organic bentonite, acrylate, xanthan gum, dispersant, and mildew inhibitor; among them, sisal staple fiber has many characteristics such as tough texture, elasticity, strong tensile strength, tear resistance, wear resistance, and corrosion resistance, and modified sepiolite is fiber. The hydrated magnesium silicate is evenly dispersed in the slurry and can form a reinforcement system with nano-fumed silica, organic bentonite and sisal staple fibers. The interaction between the components effectively enhances the strength of the corrugated paper, thereby improving the pressure resistance of the corrugated board; corn modified starch, acrylate and xanthan gum can play a bonding role, enhance the connection between the components, and make the structure of the corrugated paper tighter; the dispersant can improve the dispersibility of the components in the slurry, making the performance of the corrugated paper more excellent; the mildew inhibitor can improve the antibacterial, mildew and enzyme resistance of the corrugated paper, making the corrugated paper durable.

[0010] Preferably, the slurry is prepared by the following method:

[0011] 40-60 parts of waste wood chips and 20-30 parts of bagasse are added to 100 parts of water by weight, soaked for 20-30 hours, and then beaten to obtain slurry.

[0012] By adopting the above technical solution, the present application uses waste wood chips and sugarcane bagasse as raw materials, and mixes the two in a certain mass ratio, which can better play the advantages of the two and make the mechanical properties of corrugated paper more excellent.

[0013] Preferably, the sisal staple fibers are pretreated:

[0014] S11, adding sisal staple fibers into alkali solution, soaking at 40-60° C. for 30-40 minutes, filtering, and drying to obtain alkali-washed sisal staple fibers;

[0015] S12, subjecting the alkali-washed sisal staple fibers to plasma treatment to obtain pretreated sisal staple fibers.

[0016] Preferably, the length of the sisal staple fibers is 3-6 mm.

[0017] Preferably, the mass of the alkali solution is 20-30 times that of the sisal staple fiber; the alkali solution is obtained by mixing sodium citrate, ethylenediamine and water in a mass ratio of 1-3:5-7:20.

[0018] By adopting the above technical solution, the sisal staple fibers of the present application are pretreated: first, they are treated with alkali, then with plasma, to obtain the pretreated sisal staple fibers. This effectively improves the interface of the sisal staple fibers, resulting in a large number of active groups on the surface of the sisal staple fibers, which can better bind to other components. Furthermore, the alkali solution of the present application includes sodium citrate and ethylenediamine, which synergistically enhance the effect of the alkali treatment of the sisal staple fibers.

[0019] Preferably, the modified sepiolite comprises the following raw materials in parts by weight: 12-18 parts of sepiolite, 1-3 parts of cinnamic acid, 3-8 parts of lanthanum chloride, 5-10 parts of dodecylhydroxypropyl sulfobetaine, 30-50 parts of ethanol, and 50 parts of water.

[0020] Preferably, the modified sepiolite is prepared by the following method:

[0021] S21, dissolving cinnamic acid in ethanol, then adding sepiolite, heating to 40-60° C. and reacting for 30-60 min, then adding lanthanum chloride, maintaining the same temperature, and continuing the reaction at a speed of 600-1000 r / min for 2-3 h, filtering, and washing to obtain pretreated sepiolite;

[0022] S22. Add the pretreated sepiolite and dodecylhydroxypropyl sulfobetaine into water, mix them ultrasonically for 5-10 minutes, react at 70-80° C. for 3-5 hours, filter, wash, and dry to obtain modified sepiolite.

[0023] By adopting the above technical solution, the modified sepiolite of the present application is acidified with cinnamic acid, so that a large number of active groups appear on the surface of the sepiolite and the specific surface area is increased; then, lanthanum chloride is added. On the one hand, the lanthanum ions can undergo complexation with the active groups on the surface of the sepiolite, and on the other hand, the lanthanum ions can enter the layered pores of the sepiolite fibers and undergo ion exchange with the sodium ions in the pores. At the same time, the lanthanum ions can also increase the pore size of the layered pores of the sepiolite fibers, further increasing the specific surface area of ​​the sepiolite, thereby obtaining pretreated sepiolite; finally, dodecylhydroxypropyl sulfobetaine is added, which can undergo a cross-linking reaction with the active groups on the surface of the pretreated sepiolite, making the modified sepiolite more conducive to improving the problem of poor pressure resistance of corrugated base paper, thereby making the corrugated board have excellent pressure resistance, effectively preventing the corrugated board from compressing and deforming and avoiding direct rupture.

[0024] Preferably, the mildew inhibitor is obtained by mixing mustard extract and cyperus grosvenori oil in a mass ratio of 3:1-5.

[0025] By adopting the above technical solution, the mildew inhibitor of the present application is obtained by mixing mustard extract and arborvitae oil in a certain mass ratio. Both are natural mildew inhibitors, green and environmentally friendly, and synergistically enhance their effectiveness, so that corrugated base paper has high antibacterial and mildew-proof properties, effectively alleviating the problem that corrugated cardboard is easily contaminated by bacteria and mold during long-term storage and transportation.

[0026] Preferably, the dispersant is a sophorolipid.

[0027] Preferably, the corrugated paper is prepared by the following method:

[0028] Sisal staple fiber, modified corn starch, modified sepiolite, nano-fumed silica, organic bentonite, acrylate, xanthan gum, dispersant and mildew inhibitor are added to the slurry, mixed homogeneously, and then sent to the papermaking machine through a delivery pump for papermaking. The pulp is put on the net to form paper sheets, which are then pressed for dehydration and dried to obtain corrugated base paper.

[0029] By adopting the above technical solution, in the preparation process of corrugated base paper, the present application homogenously mixes the raw materials and then processes them through a papermaking machine to obtain corrugated base paper. The steps are simple, the cost is low, and it is suitable for industrial production.

[0030] In a second aspect, the present application provides a production process for pressure-resistant corrugated cardboard, which adopts the following technical solution:

[0031] A production process for pressure-resistant corrugated cardboard comprises the following steps:

[0032] S1. corrugating the corrugated base paper through a corrugating press to obtain corrugated corrugated base paper;

[0033] S2. Use adhesive to bond 2-4 sheets of corrugated paper to form a core paper layer;

[0034] S3. Paste the corrugated base paper on both sides of the core paper layer to form a first surface paper layer and a second surface paper layer, thereby obtaining a pressure-resistant corrugated paperboard.

[0035] By adopting the above technical solution, in the production process of corrugated cardboard, the corrugated base paper prepared in the present application is used to prepare the core paper layer and the surface paper layer, and the number of corrugated base paper used in the core paper layer is controlled, thereby optimizing the comprehensive performance of the corrugated cardboard; the production process of the pressure-resistant corrugated cardboard of the present application has simple steps and low cost, and the pressure resistance of the produced corrugated cardboard is significantly improved, which has broad market prospects.

[0036] In summary, this application has the following beneficial effects:

[0037] 1. The pressure-resistant corrugated cardboard of the present application includes a first surface paper layer, a second surface paper layer and a core paper layer between the first surface paper layer and the second surface paper layer; the first surface paper layer, the second surface paper layer and the core paper layer are all made of corrugated base paper; and the corrugated base paper includes pulp, sisal staple fiber, modified sepiolite, corn modified starch, nano-gas-phase silica, organic bentonite, acrylate, xanthan gum, dispersant, mildew inhibitor and other raw materials. The interaction between the components can effectively improve the pressure resistance of the corrugated base paper.

[0038] 2. The sisal staple fibers of the present application are pretreated: first treated with alkali solution and then with plasma, and the alkali solution includes sodium citrate and ethylenediamine, so that a large number of active groups are generated on the surface of the sisal staple fibers, which can better combine with other components and help enhance the mechanical properties of the corrugated base paper.

[0039] 3. The present application utilizes cinnamic acid, lanthanum chloride and dodecylhydroxypropyl sulfobetaine to modify sepiolite, which can increase the specific surface area of ​​sepiolite and generate a large number of active groups on the surface, thereby greatly improving the problem of poor pressure resistance of corrugated cardboard.

[0040] 4. The production process of the pressure-resistant corrugated cardboard of the present application has simple steps, low cost, and is suitable for industrial production. The comprehensive performance of the obtained pressure-resistant corrugated cardboard is more excellent and can meet higher packaging requirements. DETAILED DESCRIPTION

[0041] The present application is further described in detail below with reference to the embodiments.

[0042] Preparation Examples 1-5 and Comparative Preparation Examples 1-4 provide methods for preparing pretreated sisal staple fibers.

[0043] Preparation Example 1

[0044] Pretreatment of sisal staple fibers:

[0045] S11, selecting 100 g of sisal staple fibers with a length of 3 mm, adding them to 2000 g of alkali solution, soaking them at 40° C. for 40 min, filtering, and drying to obtain alkali-washed sisal staple fibers;

[0046] The alkali solution is prepared by mixing sodium citrate, ethylenediamine and water in a mass ratio of 1:5:20;

[0047] S12, the alkali-washed sisal staple fibers are subjected to plasma treatment, the treatment gas is oxygen, and the gas flow rate is 20cm 3 / s, power 40KW, voltage 380V, processing time 220s, to obtain pretreated sisal staple fibers.

[0048] Preparation Example 2

[0049] Pretreatment of sisal staple fibers:

[0050] S11, selecting 100 g of sisal staple fibers with a length of 3.5 mm, adding them to 2200 g of alkali solution, soaking them at 45° C. for 38 min, filtering, and drying to obtain alkali-washed sisal staple fibers;

[0051] The alkali solution is prepared by mixing sodium citrate, ethylenediamine and water in a mass ratio of 3:11:40;

[0052] S12, the alkali-washed sisal staple fibers are subjected to plasma treatment, the treatment gas is oxygen, and the gas flow rate is 25cm 3 / s, power 50KW, voltage 380V, processing time 240s, and pretreated sisal staple fibers were obtained.

[0053] Preparation Example 3

[0054] Pretreatment of sisal staple fibers:

[0055] S11, selecting 100 g of sisal staple fibers with a length of 4 mm, adding them to 2500 g of alkali solution, soaking them at 50° C. for 35 min, filtering, and drying to obtain alkali-washed sisal staple fibers;

[0056] The alkali solution is prepared by mixing sodium citrate, ethylenediamine and water in a mass ratio of 1:3:10;

[0057] S12, the alkali-washed sisal staple fibers are subjected to plasma treatment, the treatment gas is oxygen, and the gas flow rate is 30cm 3 / s, power 60KW, voltage 380V, processing time 260s, to obtain pretreated sisal staple fibers.

[0058] Preparation Example 4

[0059] Pretreatment of sisal staple fibers:

[0060] S11, selecting 100 g of sisal staple fibers with a length of 5 mm, adding them to 2800 g of alkali solution, soaking them at 55° C. for 32 min, filtering, and drying to obtain alkali-washed sisal staple fibers;

[0061] The alkali solution is prepared by mixing sodium citrate, ethylenediamine and water in a mass ratio of 5:13:40;

[0062] S12, the alkali-washed sisal staple fibers are subjected to plasma treatment, the treatment gas is oxygen, and the gas flow rate is 35cm 3 / s, power is 70KW, voltage is 380V, processing time is 280s, and pretreated sisal staple fibers are obtained.

[0063] Preparation Example 5

[0064] Pretreatment of sisal staple fibers:

[0065] S11, selecting 100 g of sisal staple fibers with a length of 6 mm, adding them to 3000 g of alkali solution, soaking them at 60° C. for 30 min, filtering, and drying to obtain alkali-washed sisal staple fibers;

[0066] The alkali solution is prepared by mixing sodium citrate, ethylenediamine and water in a mass ratio of 3:7:20;

[0067] S12, the alkali-washed sisal staple fibers are subjected to plasma treatment, with oxygen as the treatment gas and a gas flow rate of 40 cm 3 / s, power 80KW, voltage 380V, processing time 300s, and pretreated sisal staple fibers were obtained.

[0068] Comparative Preparation Example 1

[0069] Pretreatment of sisal staple fibers:

[0070] 100 g of 3 mm long sisal staple fibers were added to 2000 g of alkali solution, soaked at 40° C. for 40 min, filtered, and dried to obtain pretreated sisal staple fibers;

[0071] The alkali solution is obtained by mixing sodium citrate, ethylenediamine and water in a mass ratio of 1:5:20.

[0072] Comparative Preparation Example 2

[0073] Pretreatment of sisal staple fibers:

[0074] 100g of sisal staple fibers with a length of 3mm were selected for plasma treatment. The treatment gas was oxygen with a gas flow rate of 20cm 3 / s, power 40KW, voltage 380V, processing time 220s, to obtain pretreated sisal staple fibers.

[0075] Comparative Preparation Example 3

[0076] Comparative Preparation Example 3 is the same as Preparation Example 1, except that the alkali solution is obtained by mixing sodium citrate and water in a mass ratio of 1:20.

[0077] Comparative Preparation Example 4

[0078] Comparative Preparation Example 4 is the same as Preparation Example 1, except that the alkali solution is obtained by mixing ethylenediamine and water in a mass ratio of 1:4.

[0079] Preparation Examples 6-10 and Comparative Preparation Examples 5 and 6 provide modified sepiolite and preparation methods thereof.

[0080] Preparation Example 6

[0081] The modified sepiolite comprises the following raw materials: 120 g of sepiolite, 10 g of cinnamic acid, 30 g of lanthanum chloride, 50 g of dodecyl hydroxypropyl sulfobetaine, 300 g of ethanol, and 500 g of water.

[0082] Modified sepiolite is prepared by the following method:

[0083] S21, dissolving cinnamic acid in ethanol, then adding sepiolite, heating to 40° C. and reacting for 60 min, then adding lanthanum chloride, maintaining the same temperature, and continuing the reaction at a speed of 600 r / min for 3 h, filtering, and washing to obtain pretreated sepiolite;

[0084] S22. Add the pretreated sepiolite and dodecylhydroxypropyl sulfobetaine into water, mix them ultrasonically for 5 minutes, react them at 70° C. for 5 hours, filter, wash, and dry to obtain modified sepiolite.

[0085] Preparation Example 7

[0086] The modified sepiolite comprises the following raw materials: 130 g of sepiolite, 15 g of cinnamic acid, 40 g of lanthanum chloride, 60 g of dodecyl hydroxypropyl sulfobetaine, 350 g of ethanol, and 500 g of water.

[0087] Modified sepiolite is prepared by the following method:

[0088] S21, dissolving cinnamic acid in ethanol, then adding sepiolite, heating to 45° C. and reacting for 55 min, then adding lanthanum chloride, maintaining the same temperature, and continuing the reaction at a speed of 700 r / min for 2.8 h, filtering, and washing to obtain pretreated sepiolite;

[0089] S22. Add the pretreated sepiolite and dodecylhydroxypropyl sulfobetaine into water, mix them ultrasonically for 6 minutes, react at 72° C. for 4.5 hours, filter, wash, and dry to obtain modified sepiolite.

[0090] Preparation Example 8

[0091] The modified sepiolite comprises the following raw materials: 140 g of sepiolite, 20 g of cinnamic acid, 50 g of lanthanum chloride, 65 g of dodecyl hydroxypropyl sulfobetaine, 400 g of ethanol, and 500 g of water.

[0092] Modified sepiolite is prepared by the following method:

[0093] S21, dissolving cinnamic acid in ethanol, then adding sepiolite, heating to 50° C. and reacting for 45 min, then adding lanthanum chloride, maintaining the same temperature, and continuing the reaction at a speed of 800 r / min for 2.5 h, filtering, and washing to obtain pretreated sepiolite;

[0094] S22. Add the pretreated sepiolite and dodecylhydroxypropyl sulfobetaine into water, mix them ultrasonically for 7 minutes, react them at 75° C. for 4 hours, filter, wash, and dry to obtain modified sepiolite.

[0095] Preparation Example 9

[0096] The modified sepiolite comprises the following raw materials: 160 g of sepiolite, 25 g of cinnamic acid, 70 g of lanthanum chloride, 75 g of dodecyl hydroxypropyl sulfobetaine, 450 g of ethanol, and 500 g of water.

[0097] Modified sepiolite is prepared by the following method:

[0098] S21, dissolving cinnamic acid in ethanol, then adding sepiolite, heating to 55° C. and reacting for 35 min, then adding lanthanum chloride, maintaining the same temperature, and continuing the reaction at a speed of 900 r / min for 2.2 h, filtering, and washing to obtain pretreated sepiolite;

[0099] S22. Add the pretreated sepiolite and dodecylhydroxypropyl sulfobetaine into water, mix them ultrasonically for 8 minutes, react them at 78° C. for 3.5 hours, filter, wash, and dry to obtain modified sepiolite.

[0100] Preparation Example 10

[0101] The modified sepiolite comprises the following raw materials: 180 g of sepiolite, 30 g of cinnamic acid, 80 g of lanthanum chloride, 100 g of dodecyl hydroxypropyl sulfobetaine, 500 g of ethanol, and 500 g of water.

[0102] Modified sepiolite is prepared by the following method:

[0103] S21, dissolving cinnamic acid in ethanol, then adding sepiolite, heating to 60° C. and reacting for 30 min, then adding lanthanum chloride, maintaining the same temperature, and continuing the reaction at a speed of 1000 r / min for 2 h, filtering, and washing to obtain pretreated sepiolite;

[0104] S22. Add the pretreated sepiolite and dodecylhydroxypropyl sulfobetaine into water, mix them ultrasonically for 10 minutes, react at 80° C. for 3 hours, filter, wash, and dry to obtain modified sepiolite.

[0105] Comparative Preparation Example 5

[0106] The modified sepiolite comprises the following raw materials: 120 g of sepiolite, 10 g of cinnamic acid, 30 g of lanthanum chloride, and 300 g of ethanol.

[0107] Modified sepiolite is prepared by the following method:

[0108] First, cinnamic acid was dissolved in ethanol, and then sepiolite was added. After heating to 40°C and reacting for 60 minutes, lanthanum chloride was added. The same temperature was maintained and the reaction was continued at a speed of 600 r / min for 3 hours. The modified sepiolite was filtered and washed.

[0109] Comparative Example Preparation Example 6

[0110] The modified sepiolite comprises the following raw materials: 120 g of sepiolite, 50 g of dodecyl hydroxypropyl sulfobetaine, and 500 g of water.

[0111] Modified sepiolite is prepared by the following method:

[0112] Sepiolite and dodecylhydroxypropyl sulfobetaine were added into water, ultrasonically mixed for 5 minutes, reacted at 70°C for 5 hours, filtered, washed and dried to obtain modified sepiolite.

[0113] Preparation Examples 11-15 and Comparative Preparation Examples 7 and 8 provide methods for preparing slurries.

[0114] Preparation Example 11

[0115] The slurry is prepared by the following method:

[0116] 400 g of waste sawdust and 200 g of bagasse were added to 1000 g of water, soaked for 20 h, and then pulped to obtain slurry.

[0117] Preparation Example 12

[0118] The slurry is prepared by the following method:

[0119] 450 g of waste sawdust and 220 g of bagasse were added to 1000 g of water, soaked for 22 h, and then pulped to obtain slurry.

[0120] Preparation Example 13

[0121] The slurry is prepared by the following method:

[0122] 500 g of waste sawdust and 250 g of bagasse were added to 1000 g of water, soaked for 25 h, and then pulped to obtain slurry.

[0123] Preparation Example 14

[0124] The slurry is prepared by the following method:

[0125] 550 g of waste sawdust and 280 g of bagasse were added to 1000 g of water, soaked for 28 h, and then pulped to obtain slurry.

[0126] Preparation Example 15

[0127] The slurry is prepared by the following method:

[0128] 600 g of waste sawdust and 300 g of bagasse were added to 1000 g of water, soaked for 30 hours, and then pulped to obtain slurry.

[0129] Comparative Preparation Example 7

[0130] Comparative Preparation Example 7 is the same as Preparation Example 11, except that the same mass of waste wood chips is used to replace the bagasse.

[0131] Comparative Preparation Example 8

[0132] Comparative Preparation Example 8 is the same as Preparation Example 11, except that the waste wood chips are replaced by bagasse of equal mass.

[0133] Preparation Examples 16-20 and Comparative Preparation Examples 9-20 provide corrugated paper and preparation methods thereof.

[0134] Preparation Example 16

[0135] Corrugated base paper, including the following raw materials: pulp 600g, sisal staple fiber 200g, modified sepiolite 110g, corn modified starch 80g, nano fumed silica 50g, organic bentonite 60g, acrylate 10g, xanthan gum 20g, dispersant 10g, mildew inhibitor 10g;

[0136] The pulp was prepared by Preparation Example 11; the sisal staple fibers were pretreated by the method of Preparation Example 1; the modified sepiolite was prepared by Preparation Example 6; the dispersant was sophorolipid; the mildew inhibitor was obtained by mixing mustard extract and tarragon oil in a mass ratio of 3:1; and the corrugated base paper was prepared by the following method:

[0137] Sisal staple fiber, modified corn starch, modified sepiolite, nano-fumed silica, organic bentonite, acrylate, xanthan gum, dispersant and mildew inhibitor are added to the slurry, homogenized and mixed at a speed of 20,000 rpm for 10 minutes, and then sent to a papermaking machine through a delivery pump for papermaking. The pulp is put on the net to form paper sheets, which are then pressed for dehydration and dried to obtain corrugated base paper.

[0138] Preparation Example 17

[0139] Corrugated base paper, including the following raw materials: pulp 700g, sisal staple fiber 220g, modified sepiolite 120g, corn modified starch 90g, nano fumed silica 55g, organic bentonite 70g, acrylate 20g, xanthan gum 25g, dispersant 15g, mildew inhibitor 20g;

[0140] The slurry was prepared by Preparation Example 12; the sisal staple fibers were pretreated by the method of Preparation Example 2; the modified sepiolite was prepared by Preparation Example 7; the dispersant was sophorolipid; and the mildew inhibitor was obtained by mixing mustard extract and arborvitae oil in a mass ratio of 3:2.

[0141] Corrugated base paper is produced by the following method:

[0142] Sisal staple fiber, modified corn starch, modified sepiolite, nano-fumed silica, organic bentonite, acrylate, xanthan gum, dispersant and mildew inhibitor are added to the slurry, homogenized and mixed at a speed of 22000 rpm for 7 minutes, and then sent to the papermaking machine through a delivery pump for papermaking. The pulp is put on the net to form paper sheets, which are then pressed for dehydration and dried to obtain corrugated base paper.

[0143] Preparation Example 18

[0144] Corrugated base paper, including the following raw materials: pulp 800g, sisal staple fiber 250g, modified sepiolite 130g, corn modified starch 100g, nano fumed silica 60g, organic bentonite 80g, acrylate 25g, xanthan gum 30g, dispersant 20g, mildew inhibitor 25g;

[0145] The slurry was prepared by Preparation Example 13; the sisal staple fibers were pretreated by the method of Preparation Example 3; the modified sepiolite was prepared by Preparation Example 8; the dispersant was sophorolipid; and the mildew inhibitor was obtained by mixing mustard extract and tarragon oil in a mass ratio of 1:1.

[0146] Corrugated base paper is produced by the following method:

[0147] Sisal staple fiber, modified corn starch, modified sepiolite, nano-fumed silica, organic bentonite, acrylate, xanthan gum, dispersant and mildew inhibitor are added to the slurry, homogenized and mixed at a speed of 23,000 rpm for 8 minutes, and then sent to a papermaking machine through a delivery pump for papermaking. The pulp is put on the net to form paper sheets, which are then pressed for dehydration and dried to obtain corrugated base paper.

[0148] Preparation Example 19

[0149] Corrugated base paper, including the following raw materials: pulp 900g, sisal staple fiber 28g, modified sepiolite 140g, corn modified starch 110g, nano fumed silica 65g, organic bentonite 90g, acrylate 30g, xanthan gum 35g, dispersant 25g, mildew inhibitor 30g;

[0150] The slurry was prepared by Preparation Example 14; the sisal staple fibers were pretreated by the method of Preparation Example 4; the modified sepiolite was prepared by Preparation Example 9; the dispersant was sophorolipid; and the mildew inhibitor was obtained by mixing mustard extract and arborvitae oil in a mass ratio of 3:4.

[0151] Corrugated base paper is produced by the following method:

[0152] Sisal staple fiber, modified corn starch, modified sepiolite, nano-fumed silica, organic bentonite, acrylate, xanthan gum, dispersant and mildew inhibitor are added to the slurry, homogenized and mixed at a speed of 24,000 rpm for 9 minutes, and then sent to a papermaking machine through a delivery pump for papermaking. The pulp is put on the net to form paper sheets, which are then pressed for dehydration and dried to obtain corrugated base paper.

[0153] Preparation Example 20

[0154] Corrugated base paper, including the following raw materials: pulp 1000g, sisal staple fiber 300g, modified sepiolite 150g, corn modified starch 120g, nano fumed silica 70g, organic bentonite 100g, acrylate 40g, xanthan gum 40g, dispersant 30g, mildew inhibitor 40g;

[0155] The pulp was prepared by Preparation Example 15; the sisal staple fibers were pretreated by the method of Preparation Example 5; the modified sepiolite was prepared by Preparation Example 10; the dispersant was sophorolipid; the mildew inhibitor was obtained by mixing mustard extract and tarragon oil in a mass ratio of 3:5; and the corrugated base paper was prepared by the following method:

[0156] Sisal staple fiber, modified corn starch, modified sepiolite, nano-fumed silica, organic bentonite, acrylate, xanthan gum, dispersant and mildew inhibitor are added to the slurry, homogenized and mixed at a speed of 25,000 rpm for 10 minutes, and then sent to a papermaking machine through a delivery pump for papermaking. The pulp is put on the net to form paper sheets, which are then pressed for dehydration and dried to obtain corrugated paper.

[0157] Comparative Preparation Example 9

[0158] Comparative Preparation Example 9 is the same as Preparation Example 16, except that the slurry is prepared by Comparative Preparation Example 7.

[0159] Comparative Preparation Example 10

[0160] Comparative Preparation Example 10 is the same as Preparation Example 16, except that the slurry is prepared by Comparative Preparation Example 8.

[0161] Comparative Preparation Example 11

[0162] Comparative Preparation Example 11 is the same as Preparation Example 16, except that the sisal staple fibers are pretreated using the method of Comparative Preparation Example 1.

[0163] Comparative Preparation Example 12

[0164] Comparative Preparation Example 12 is the same as Preparation Example 16, except that the sisal staple fibers are pretreated using the method of Comparative Preparation Example 2.

[0165] Comparative Preparation Example 13

[0166] Comparative Preparation Example 13 is the same as Preparation Example 16, except that the sisal staple fibers are pretreated using the method of Comparative Preparation Example 3.

[0167] Comparative Preparation Example 14

[0168] Comparative Preparation Example 14 is the same as Preparation Example 16, except that the sisal staple fibers are pretreated using the method of Comparative Preparation Example 4.

[0169] Comparative Preparation Example 15

[0170] Comparative Preparation Example 15 is the same as Preparation Example 16, except that unpretreated sisal staple fibers are used.

[0171] Comparative Preparation Example 16

[0172] Comparative Preparation Example 16 is the same as Preparation Example 16, except that the modified sepiolite is prepared by Comparative Preparation Example 5.

[0173] Comparative Preparation Example 17

[0174] Comparative Preparation Example 17 is the same as Preparation Example 16, except that the modified sepiolite is prepared by Comparative Preparation Example 6.

[0175] Comparative Preparation Example 18

[0176] Comparative Preparation Example 18 is the same as Preparation Example 16, except that unmodified sepiolite is used.

[0177] Comparative Preparation Example 19

[0178] Comparative Preparation Example 19 is the same as Preparation Example 16, except that the mildew inhibitor is only mustard extract.

[0179] Comparative Preparation Example 20

[0180] Comparative Preparation Example 20 is the same as Preparation Example 16, except that the mildew inhibitor is only cyperus grosvenori oil.

[0181] Examples 1-5 provide a pressure-resistant corrugated cardboard and a production process thereof.

[0182] Example 1

[0183] A pressure-resistant corrugated paperboard comprises a first surface paper layer, a second surface paper layer and a core paper layer arranged between the first surface paper layer and the second surface paper layer;

[0184] The first face paper layer, the second face paper layer, and the core paper layer are all made of corrugated base paper; and the corrugated base paper is prepared according to Preparation Example 16;

[0185] A production process for pressure-resistant corrugated cardboard comprises the following steps:

[0186] S1. corrugating the corrugated base paper through a corrugating press to obtain corrugated corrugated base paper;

[0187] S2. Use adhesive to bond two sheets of corrugated paper together to form a core paper layer;

[0188] S3, pasting the corrugated base paper on both sides of the core paper layer to form a first surface paper layer and a second surface paper layer, thereby obtaining a pressure-resistant corrugated paperboard;

[0189] Wherein, the adhesive is starch adhesive.

[0190] Example 2

[0191] A pressure-resistant corrugated paperboard comprises a first surface paper layer, a second surface paper layer and a core paper layer arranged between the first surface paper layer and the second surface paper layer;

[0192] The first face paper layer, the second face paper layer, and the core paper layer are all made of corrugated paper; and the corrugated paper is prepared according to Preparation Example 17;

[0193] A production process for pressure-resistant corrugated cardboard comprises the following steps:

[0194] S1. corrugating the corrugated base paper through a corrugating press to obtain corrugated corrugated base paper;

[0195] S2. Use adhesive to bond three sheets of corrugated paper to form a core paper layer;

[0196] S3, pasting the corrugated base paper on both sides of the core paper layer to form a first surface paper layer and a second surface paper layer, thereby obtaining a pressure-resistant corrugated paperboard;

[0197] Wherein, the adhesive is starch adhesive.

[0198] Example 3

[0199] A pressure-resistant corrugated paperboard comprises a first surface paper layer, a second surface paper layer and a core paper layer arranged between the first surface paper layer and the second surface paper layer;

[0200] The first face paper layer, the second face paper layer, and the core paper layer are all made of corrugated paper; and the corrugated paper is made by Preparation Example 18;

[0201] A production process for pressure-resistant corrugated cardboard comprises the following steps:

[0202] S1. corrugating the corrugated base paper through a corrugating press to obtain corrugated corrugated base paper;

[0203] S2. Use adhesive to bond four sheets of corrugated paper to form a core paper layer;

[0204] S3, pasting the corrugated base paper on both sides of the core paper layer to form a first surface paper layer and a second surface paper layer, thereby obtaining a pressure-resistant corrugated paperboard;

[0205] Wherein, the adhesive is starch adhesive.

[0206] Example 4

[0207] A pressure-resistant corrugated paperboard comprises a first surface paper layer, a second surface paper layer and a core paper layer arranged between the first surface paper layer and the second surface paper layer;

[0208] The first face paper layer, the second face paper layer, and the core paper layer are all made of corrugated base paper; and the corrugated base paper is prepared according to Preparation Example 19;

[0209] A production process for pressure-resistant corrugated cardboard comprises the following steps:

[0210] S1. corrugating the corrugated base paper through a corrugating press to obtain corrugated corrugated base paper;

[0211] S2. Use adhesive to bond three sheets of corrugated paper to form a core paper layer;

[0212] S3, pasting the corrugated base paper on both sides of the core paper layer to form a first surface paper layer and a second surface paper layer, thereby obtaining a pressure-resistant corrugated paperboard;

[0213] Wherein, the adhesive is starch adhesive.

[0214] Example 5

[0215] A pressure-resistant corrugated paperboard comprises a first surface paper layer, a second surface paper layer and a core paper layer arranged between the first surface paper layer and the second surface paper layer;

[0216] The first face paper layer, the second face paper layer, and the core paper layer are all made of corrugated paper; and the corrugated paper is prepared according to Preparation Example 20;

[0217] A production process for pressure-resistant corrugated cardboard comprises the following steps:

[0218] S1. corrugating the corrugated base paper through a corrugating press to obtain corrugated corrugated base paper;

[0219] S2. Use adhesive to bond two sheets of corrugated paper together to form a core paper layer;

[0220] S3, pasting the corrugated base paper on both sides of the core paper layer to form a first surface paper layer and a second surface paper layer, thereby obtaining a pressure-resistant corrugated paperboard;

[0221] Wherein, the adhesive is starch adhesive.

[0222] In order to verify the performance of the pressure-resistant corrugated cardboard provided by this application, the applicant set up comparative examples 1-12, among which: Comparative example 1

[0223] Comparative Example 1 is the same as Example 1, except that the corrugated base paper is prepared by Comparative Preparation Example 9.

[0224] Comparative Example 2

[0225] Comparative Example 2 is the same as Example 1, except that the corrugated base paper is prepared from Comparative Preparation Example 10.

[0226] Comparative Example 3

[0227] Comparative Example 3 is the same as Example 1, except that the corrugated base paper is prepared from Comparative Preparation Example 11.

[0228] Comparative Example 4

[0229] Comparative Example 4 is the same as Example 1, except that the corrugated base paper is prepared from Comparative Preparation Example 12.

[0230] Comparative Example 5

[0231] Comparative Example 5 is the same as Example 1, except that the corrugated base paper is prepared from Comparative Preparation Example 13.

[0232] Comparative Example 6

[0233] Comparative Example 6 is the same as Example 1, except that the corrugated base paper is prepared by Comparative Preparation Example 14.

[0234] Comparative Example 7

[0235] Comparative Example 7 is the same as Example 1, except that the corrugated base paper is prepared from Comparative Preparation Example 15.

[0236] Comparative Example 8

[0237] Comparative Example 8 is the same as Example 1, except that the corrugated base paper is prepared from Comparative Preparation Example 16.

[0238] Comparative Example 9

[0239] Comparative Example 9 is the same as Example 1, except that the corrugated base paper is prepared from Comparative Preparation Example 17.

[0240] Comparative Example 10

[0241] Comparative Example 10 is the same as Example 1, except that the corrugated base paper is prepared from Comparative Preparation Example 18.

[0242] Comparative Example 11

[0243] Comparative Example 11 is the same as Example 1, except that the corrugated base paper is prepared by Comparative Preparation Example 19.

[0244] Comparative Example 12

[0245] Comparative Example 12 is the same as Example 1, except that the corrugated base paper is prepared by Comparative Preparation Example 20.

[0246] The main properties of the pressure-resistant corrugated paperboards in Examples 1-5 and Comparative Examples 1-12 were respectively compared to obtain the following result parameters, as shown in Table 1:

[0247] Compression performance test: Edge compression strength test is carried out in accordance with GB / T2679.17-1997 "Determination of edge compression strength of corrugated board (edge ​​reinforcement method)"; bursting strength test is carried out in accordance with GB / T6545-1998 "Determination of bursting strength of corrugated board";

[0248] Antibacterial and mildew proof performance test: corrugated cardboard was cut into round samples with a diameter of 100 mm, sterilized under ultraviolet light and set aside; gray mold and Staphylococcus aureus were selected and inoculated into PDA culture medium respectively, cultured at 37°C for 48 hours, and then eluted with sterile saline to prepare 107 CFU / mL bacterial suspensions respectively for set aside; 15 mL of melted PDA culture medium was poured into a culture dish, 0.1 mL of bacterial suspension was added, and the sample was evenly spread. Then, a corrugated cardboard sample was placed in the culture dish and cultured at 37°C for 48 hours. The diameter of the inhibition zone was calculated.

[0249] Table 1:

[0250]

[0251]

[0252] It can be seen from the data shown in Table 1 above that the comprehensive performance of the corrugated cardboards prepared in Examples 1-5 of the present application is far superior to that of the corrugated cardboards prepared in Comparative Examples 1-12, and they have significant pressure resistance and excellent antibacterial and mildew resistance, which makes the corrugated cardboards have broad application prospects.

[0253] It can be seen from Example 1 and Comparative Examples 1 and 2 that the corrugated base paper in Example 1 is prepared from Preparation Example 16, and the pulp in Preparation Example 16 includes waste wood chips and sugarcane bagasse. Compared with Comparative Examples 1 and 2, the pressure resistance of the corrugated board obtained in Example 1 is better.

[0254] It can be seen from Example 1 and Comparative Examples 3 and 4 that the corrugated base paper in Example 1 is prepared by Preparation Example 16, and the sisal staple fiber in Preparation Example 16 is prepared by Preparation Example 1, and the sisal staple fiber is first treated with alkali solution and then plasma treated. Compared with Comparative Examples 3 and 4, the pressure resistance of the corrugated cardboard obtained in Example 1 is significantly improved.

[0255] It can be seen from Example 1 and Comparative Examples 5 and 6 that the corrugated base paper in Example 1 is prepared by Preparation Example 16, the sisal staple fiber in Preparation Example 16 is prepared by Preparation Example 1, and the alkali solution includes sodium citrate and ethylenediamine. Compared with Comparative Examples 5 and 6, the corrugated cardboard obtained in Example 1 has excellent pressure resistance and better antibacterial and mildew resistance.

[0256] It can be seen from Example 1 and Comparative Example 7 that the corrugated base paper in Example 1 is prepared by Preparation Example 16, and the sisal staple fiber in Preparation Example 16 is prepared by Preparation Example 1. Compared with the sisal staple fiber in Comparative Example 7 which is not pretreated, the pressure resistance and antibacterial and mildew resistance of the corrugated board obtained in Example 1 are better than those in Comparative Example 7.

[0257] It can be seen from Example 1 and Comparative Examples 8 and 9 that the corrugated base paper in Example 1 is prepared from Preparation Example 16, and the modified sepiolite in Preparation Example 16 is prepared from Preparation Example 6. The sepiolite is first pretreated with cinnamic acid and lanthanum chloride, and then modified with dodecylhydroxypropyl sulfobetaine. Compared with Comparative Examples 8 and 9, the corrugated board obtained in Example 1 has better performance and has broad application prospects.

[0258] It can be seen from Example 1 and Comparative Example 10 that the corrugated base paper in Example 1 is prepared from Preparation Example 16, and the modified sepiolite in Preparation Example 16 is prepared from Preparation Example 6. Compared with the unmodified sepiolite in Comparative Example 10, the corrugated cardboard obtained in Example 1 has excellent pressure resistance, which is beneficial to the compression and tension deformation of the corrugated cardboard to avoid the problem of direct rupture.

[0259] It can be seen from Example 1 and Comparative Examples 11 and 12 that the corrugated base paper in Example 1 is prepared by Preparation Example 16, and the mildew inhibitor in Preparation Example 16 is obtained by mixing mustard extract and arborvitae oil. Compared with Comparative Examples 11 and 12, the corrugated cardboard obtained in Example 1 has excellent antibacterial and mildew-proof properties.

[0260] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A pressure-resistant corrugated cardboard, characterized in that: It comprises a first surface paper layer, a second surface paper layer and a core paper layer arranged between the first surface paper layer and the second surface paper layer; The first face paper layer, the second face paper layer and the core paper layer are all made of corrugated paper; The corrugated base paper comprises the following raw materials in parts by weight: 60-100 parts of pulp, 20-30 parts of sisal staple fibers, 11-15 parts of modified sepiolite, 8-12 parts of modified corn starch, 5-7 parts of nano-fumed silica, 6-10 parts of organic bentonite, 1-4 parts of acrylate, 2-4 parts of xanthan gum, 1-3 parts of dispersant, and 1-4 parts of mildew inhibitor. The modified sepiolite comprises the following raw materials in parts by weight: 12-18 parts of sepiolite, 1-3 parts of cinnamic acid, 3-8 parts of lanthanum chloride, 5-10 parts of dodecylhydroxypropyl sulfobetaine, 30-50 parts of ethanol, and 50 parts of water; The modified sepiolite is prepared by the following method: S21, dissolving cinnamic acid in ethanol, then adding sepiolite, heating to 40-60° C. and reacting for 30-60 min, then adding lanthanum chloride, maintaining the same temperature, and continuing the reaction at a speed of 600-1000 r / min for 2-3 h, filtering, and washing to obtain pretreated sepiolite; S22. Add the pretreated sepiolite and dodecylhydroxypropyl sulfobetaine into water, mix them ultrasonically for 5-10 minutes, react at 70-80° C. for 3-5 hours, filter, wash, and dry to obtain modified sepiolite.

2. The pressure-resistant corrugated cardboard according to claim 1, characterized in that: The slurry is prepared by the following method: adding 40-60 parts of waste sawdust and 20-30 parts of bagasse by weight into 100 parts of water, soaking for 20-30 hours, and then beating to obtain the slurry.

3. The pressure-resistant corrugated cardboard according to claim 1, characterized in that: The sisal staple fibers were pretreated: S11, adding sisal staple fibers into alkali solution, soaking at 40-60° C. for 30-40 minutes, filtering, and drying to obtain alkali-washed sisal staple fibers; S12, subjecting the alkali-washed sisal staple fibers to plasma treatment to obtain pretreated sisal staple fibers.

4. The pressure-resistant corrugated cardboard according to claim 3, characterized in that: The mass of the alkali solution is 20-30 times that of the sisal staple fiber; the alkali solution is obtained by mixing sodium citrate, ethylenediamine and water in a mass ratio of 1-3:5-7:

20.

5. The pressure-resistant corrugated paperboard according to claim 1, characterized in that: The mildew inhibitor is obtained by mixing mustard extract and cyperus grosvenori oil in a mass ratio of 3:1-5.

6. The pressure-resistant corrugated paperboard according to claim 1, characterized in that: The corrugated base paper is prepared by the following method: Sisal staple fiber, modified corn starch, modified sepiolite, nano-fumed silica, organic bentonite, acrylate, xanthan gum, dispersant and mildew inhibitor are added to the slurry, mixed homogeneously, and then sent to the papermaking machine through a delivery pump for papermaking. The pulp is put on the net to form paper sheets, which are then pressed for dehydration and dried to obtain corrugated base paper.

7. A process for producing pressure-resistant corrugated paperboard according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. corrugating the corrugated base paper through a corrugating press to obtain corrugated corrugated base paper; S2. Use adhesive to bond 2-4 sheets of corrugated paper to form a core paper layer; S3. Paste the corrugated base paper on both sides of the core paper layer to form a first surface paper layer and a second surface paper layer, thereby obtaining a pressure-resistant corrugated paperboard.

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