High-pressure-resistance corrugated board body paper and production process thereof

Abstract

The invention relates to the technical field of papermaking, in particular to high-pressure-resistance corrugated board body paper and a production process thereof. The preparation method comprises the following steps: firstly, carrying out graft modification on diatomite by adopting 3-glycidyl ether oxypropyl triethoxy silane, then uniformly dispersing the diatomite in a polyhexamethylene guanidine salt aqueous solution, and mixing and stirring so that the polyhexamethylene guanidine salt is uniformly dispersed and attached to the surface and the porous structure of the diatomite; and finally, the antibacterial agent is successfully'grafted 'on the surface of the diatomite through 3-glycidyl ether oxypropyl triethoxy silane, and a three-dimensional antibacterial network is formed on the surface of the diatomite, so that the antibacterial performance of the functional additive is effectively ensured under the synergistic cooperation of the diatomite, the polyhexamethylene guanidine salt and the antibacterial agent. As the raw material of the corrugated board body paper, the antibacterial property is remarkably improved, and the service life is prolonged to a certain extent; in addition, the use of the fiber reinforcements can effectively improve the mechanical properties of the corrugated board body paper, and effectively ensure the quality of the corrugated board body paper.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking, in particular to a high-pressure-resistant corrugated paperboard base paper and a production process thereof. Background Art

[0002] Corrugated paper, also known as kraft paper or paperboard, is a common material for paper packaging boxes. It is lighter than wooden boxes, has more rigidity, and is easy to cut to size to protect other packaged products from damage. Corrugated paper can be printed with patterns and texts of different colors or written with text symbols on the outside. The cost is relatively cheap. Avoid water immersion, moisture, mold, water, hand hooks, etc. It is sometimes used as a handicraft material. Corrugated base paper is one of the important components of corrugated board production. Corrugated base paper requires good fiber bonding strength, a smooth paper surface, good tightness and stiffness, and a certain degree of elasticity to ensure that the finished carton has shockproof and pressure resistance.

[0003] A method for preparing corrugated paper from apple juice waste is disclosed in the patent document with application number "CN201310337842.1". This patent document combines the characteristics of the fiber morphology and chemical components of apple juice waste and uses it to prepare corrugated paper, which not only solves the problem of utilizing apple juice waste, but also saves papermaking raw materials. The prepared corrugated paper has high surface flatness and is waterproof, moisture-proof and mildew-proof. Although the corrugated paper prepared by this patent document has certain waterproof, moisture-proof and mildew-proof properties, its own mechanical properties are relatively insufficient, which affects its quality to a certain extent. Furthermore, its own antibacterial properties are also relatively poor, which shortens its service life to a certain extent. Based on this, the present invention provides a high-compression corrugated board base paper and its production process to solve the above-mentioned technical problems! Summary of the invention

[0004] The purpose of the present invention is to provide a high-compression-resistant corrugated cardboard base paper and a production process thereof. The produced corrugated cardboard base paper not only has excellent mechanical properties but also has good antibacterial properties, which ensures its quality while also extending its service life to a certain extent.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a production process for high-pressure corrugated board base paper, comprising the following steps:

[0007] Step 1: transport the Class A domestic waste paper to a pulper and inject water into it, mix it evenly and then perform pulping treatment; then use a sediment well, an impurity separator and a drum screen to separate the large-volume impurities therein, and store the obtained pulp for future use;

[0008] Step 2, screening and purifying the pulp obtained in step 1; transferring the purified pulp into a multi-disc thickening device for washing and concentration to obtain a concentrated pulp liquid with a concentration of 5 to 8 wt%;

[0009] Step 3, adding 2-3% of the mass of the composite nano powder, 4-6% of carboxymethyl cellulose, 5-8% of zinc borate, 2-3% of emulsified silicone oil, 3-5% of sodium lignin sulfonate, 2.5-3.5% of alkyl ketene dimer, 4-5% of polyacrylamide, 2-5% of mildewproof agent, 20-25% of fiber reinforcement and 8-12% of functional additives to the concentrated pulp obtained in step 2, mixing and stirring evenly, and conveying the obtained mixed pulp to a papermaking workshop, and successively undergoing mesh forming, pressing, drying, surface sizing and drying treatment to finally obtain a high-compression corrugated board base paper product.

[0010] Furthermore, the purification process uses a one-stage medium-concentration cleaner and a four-stage low-concentration cleaner; and the screening process uses a four-stage coarse screening-three-stage fine screening process.

[0011] Furthermore, the concentration of the pulp in the low-concentration cleaner is 1.5-1.8wt%, and the ash content of the pulp is 8-12%; the sieve width of the fine screen is 0.12-0.15mm, and the concentration of the pulp after the fine screen is 0.6-1.0wt%.

[0012] Furthermore, the preparation method of the functional additive comprises the following steps:

[0013] The first step is to add diatomaceous earth into distilled water at a solid-liquid ratio of 30 to 80 g / L, and then add 3-glycidyloxypropyltriethoxysilane with a mass of 0.3 to 0.5 times that of the diatomaceous earth, mix and stir evenly, and then stir and react at a temperature of 60 to 80° C. for 5 to 10 hours; after the reaction is completed, the obtained product components are separated into solid and liquid, and the obtained filter cake is washed with distilled water and ethanol for 2 to 3 times respectively, and then dried, and the obtained solid powder is stored and used for standby;

[0014] The second step is to evenly disperse the solid powder in a polyhexamethyleneguanidine salt aqueous solution with a concentration of 2 to 3 wt% at a solid-liquid ratio of 20 to 50 g / L, then add an antibacterial agent with a mass of 0.3 to 0.5 of the solid powder, mix and stir evenly, and then keep warm and stir at a temperature of 40 to 50° C. for 2 to 3 days; after the reaction is completed, centrifuge and wash and dry the resulting components in turn, and the final product is the functional additive product.

[0015] Furthermore, the composite nano powder is prepared by mixing nano titanium dioxide and nano zinc oxide in a mass ratio of 1:1 to 2.

[0016] Furthermore, the antifungal agent is selected from any one of caprylhydroxamic acid, kasone, and glyceryl caprylate.

[0017] Furthermore, the fiber reinforcement is selected from any one of sepiolite fiber and brucite fiber.

[0018] Furthermore, the sizing agent used in the surface sizing is any one of cationic polyacrylamide and polyamide polyurea resin; and the amount used is 3-6 kg / ton of paper.

[0019] Furthermore, the antibacterial agent is selected from any one of dodecylbenzyldimethylammonium chloride, dodecyltrimethylammonium chloride and didecyldimethylammonium chloride.

[0020] In a second aspect, the present invention provides a high-compression-resistant corrugated board base paper, which is produced by the production process described above.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention adopts 3-glycidyloxypropyl triethoxysilane to graft and modify diatomite, and finally it is connected to the relevant active groups on the surface of diatomite through chemical bonds and "grafted" on the surface of diatomite and the inside of its porous structure, effectively improving its dispersion performance. Then the solid micropowder obtained after the graft modification of diatomite is uniformly dispersed in the polyhexamethylene guanidine salt aqueous solution, and the polyhexamethylene guanidine salt is uniformly dispersed and attached to the surface of diatomite and its porous structure by mixing and stirring. Finally, the antibacterial agent is successfully "grafted" on the surface of diatomite through 3-glycidyloxypropyl triethoxysilane, and a three-dimensional antibacterial network is formed on the surface of diatomite. Under the coordinated cooperation of diatomite, polyhexamethylene guanidine salt and antibacterial agent, the antibacterial performance of the functional additive is effectively guaranteed. It is used as the raw material of corrugated board base paper to significantly improve its antibacterial performance and extend its service life to a certain extent. Furthermore, the use of fiber reinforcement can effectively improve the mechanical properties of corrugated board base paper and effectively guarantee its quality. DETAILED DESCRIPTION

[0023] The following will be combined with 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.

[0024] Example 1

[0025] A production process for high-pressure corrugated paperboard base paper, comprising the following steps:

[0026] Step 1: transport the Class A domestic waste paper to a pulper and inject water into it, mix it evenly and then perform pulping treatment; then use a sediment well, an impurity separator and a drum screen to separate the large-volume impurities therein, and store the obtained pulp for future use;

[0027] Step 2, screening and purifying the pulp obtained in step 1; the purified pulp is transferred to a multi-disc thickening device for washing and concentration to obtain a concentrated pulp liquid with a concentration of 5wt%; wherein, a one-stage medium-concentration cleaner and a four-stage low-concentration cleaner are used for purification; and a four-stage coarse screen-three-stage fine screen process is used for screening; the concentration of the pulp in the low-concentration cleaner is 1.5wt%, and the ash content of the pulp is 8%; the screen gap width of the fine screen is 0.12mm, and the pulp concentration after fine screening is 0.6wt%;

[0028] Step 3, adding 2% of the mass of the composite nano powder, 4% of carboxymethyl cellulose, 5% of zinc borate, 2% of emulsified silicone oil, 3% of sodium lignin sulfonate, 2.5% of alkyl ketene dimer, 4% of polyacrylamide, 2% of octanoyl hydroxamic acid, 20% of sepiolite fiber and 8% of functional additives to the concentrated pulp obtained in step 2, mixing and stirring evenly, and then conveying the obtained mixed pulp to a papermaking workshop, and sequentially undergoing net forming, pressing, drying, surface sizing and drying treatment to finally obtain a high-pressure corrugated board base paper product; wherein the composite nano powder is prepared by mixing nano titanium dioxide and nano zinc oxide in equal masses; the sizing agent used in the surface sizing is cationic polyacrylamide; and the amount thereof is 3kg / ton of paper.

[0029] The preparation method of the functional additive comprises the following steps:

[0030] The first step is to add diatomaceous earth into distilled water at a solid-liquid ratio of 30 g / L, and then add 3-glycidyloxypropyltriethoxysilane with a mass of 0.3 times that of diatomaceous earth, mix and stir evenly, and then stir and react at a temperature of 60° C. for 5 hours; after the reaction is completed, the resulting components are separated into solid and liquid, and the resulting filter cake is washed with distilled water and ethanol twice each in turn and then dried, and the resulting solid powder is stored and used for standby;

[0031] The second step is to evenly disperse the solid powder in a 2wt% polyhexamethyleneguanidine salt aqueous solution at a solid-liquid ratio of 20g / L, then add dodecylbenzyldimethylammonium chloride with a mass of 0.3 of the solid powder, mix and stir evenly, and then keep warm and stir at 40°C for 2 days; after the reaction is completed, centrifuge and wash and dry the resulting components in turn, and the final product is the functional additive product.

[0032] Example 2

[0033] A production process for high-pressure corrugated paperboard base paper, comprising the following steps:

[0034] Step 1: transport the Class A domestic waste paper to a pulper and inject water into it, mix it evenly and then perform pulping treatment; then use a sediment well, an impurity separator and a drum screen to separate the large-volume impurities therein, and store the obtained pulp for future use;

[0035] Step 2, screening and purifying the pulp obtained in step 1; the purified pulp is transferred to a multi-disc thickening device for washing and concentration to obtain a concentrated pulp liquid with a concentration of 6wt%; wherein, a one-stage medium-concentration cleaner and a four-stage low-concentration cleaner are used for purification; and a four-stage coarse screen-three-stage fine screen process is used for screening; the concentration of the pulp in the low-concentration cleaner is 1.6wt%, and the ash content of the pulp is 10%; the screen slot width of the fine screen is 0.13mm, and the pulp concentration after fine screening is 0.8wt%;

[0036] Step 3, adding 2.5% of the mass of the composite nano powder, 5% of carboxymethyl cellulose, 6% of zinc borate, 3% of emulsified silicone oil, 4% of sodium lignin sulfonate, 3% of alkyl ketene dimer, 4% of polyacrylamide, 3% of kason, 20% of brucite fiber and 10% of functional additives to the concentrated pulp obtained in step 2, mixing and stirring evenly, and conveying the obtained mixed slurry to a papermaking workshop, and sequentially undergoing net forming, pressing, drying, surface sizing and drying treatment to finally obtain a high-pressure corrugated board base paper product; wherein the composite nano powder is prepared by mixing nano titanium dioxide and nano zinc oxide in a mass ratio of 1:1.5; the sizing agent used in the surface sizing is polyamide polyurea resin; and the amount thereof is 5kg / ton of paper.

[0037] The preparation method of the functional additive comprises the following steps:

[0038] The first step is to add diatomaceous earth into distilled water at a solid-liquid ratio of 50g / L, and then add 3-glycidyloxypropyltriethoxysilane with a mass of 0.4 times that of diatomaceous earth, mix and stir evenly, and then stir and react at a temperature of 70°C for 8h; after the reaction is completed, the resulting components are separated into solid and liquid, and the filter cake is washed with distilled water and ethanol for 3 times respectively, and then dried, and the solid powder is stored and used for standby;

[0039] The second step is to evenly disperse the solid powder in a 3wt% polyhexamethylene guanidine salt aqueous solution at a solid-liquid ratio of 40g / L, then add dodecyltrimethylammonium chloride with a mass of 0.4 of the solid powder, mix and stir evenly, and then keep warm and stir at 45°C for 2 days; after the reaction is completed, centrifuge and wash and dry the resulting components in turn, and the final product is the functional additive product.

[0040] Example 3

[0041] A production process for high-pressure corrugated paperboard base paper, comprising the following steps:

[0042] Step 1: transport the Class A domestic waste paper to a pulper and inject water into it, mix it evenly and then perform pulping treatment; then use a sediment well, an impurity separator and a drum screen to separate the large-volume impurities therein, and store the obtained pulp for future use;

[0043] Step 2, screening and purifying the pulp obtained in step 1; the purified pulp is transferred to a multi-disc thickening device for washing and concentration to obtain a concentrated pulp liquid with a concentration of 8wt%; wherein, a one-stage medium-concentration cleaner and a four-stage low-concentration cleaner are used for purification; and a four-stage coarse screen-three-stage fine screen process is used for screening; the concentration of the pulp in the low-concentration cleaner is 1.8wt%, and the ash content of the pulp is 12%; the screen slot width of the fine screen is 0.15mm, and the pulp concentration after fine screening is 1.0wt%;

[0044] Step 3, adding 3% of the mass of the composite nano powder, 6% of carboxymethyl cellulose, 8% of zinc borate, 3% of emulsified silicone oil, 5% of sodium lignin sulfonate, 3.5% of alkyl ketene dimer, 5% of polyacrylamide, 5% of glycerol caprylate, 25% of sepiolite fiber and 12% of functional additives to the concentrated pulp obtained in step 2, mixing and stirring evenly, and then conveying the obtained mixed pulp to a papermaking workshop, and sequentially undergoing net forming, pressing, drying, surface sizing and drying treatment to finally obtain a high-pressure corrugated board base paper product; wherein the composite nano powder is prepared by mixing nano titanium dioxide and nano zinc oxide in a mass ratio of 1:2; the sizing agent used in the surface sizing is cationic polyacrylamide; and its dosage is 6kg / ton of paper.

[0045] The preparation method of the functional additive comprises the following steps:

[0046] The first step is to add diatomaceous earth into distilled water at a solid-liquid ratio of 80g / L, and then add 3-glycidyloxypropyltriethoxysilane with a mass of 0.5 times that of diatomaceous earth, mix and stir evenly, and then stir and react at a temperature of 80°C for 10 hours; after the reaction is completed, the resulting components are separated into solid and liquid, and the obtained filter cake is washed with distilled water and ethanol for 3 times respectively, and then dried, and the obtained solid powder is stored and used for standby;

[0047] The second step is to evenly disperse the solid powder in a 3wt% polyhexamethylene guanidine salt aqueous solution at a solid-liquid ratio of 50g / L, then add didecyl dimethyl ammonium chloride with a mass of 0.5 of the solid powder, mix and stir evenly, and then keep stirring at a temperature of 50°C for 3 days; after the reaction is completed, centrifuge and wash and dry the resulting components in turn, and the final product is the functional additive product.

[0048] Comparative Example 1 is different from Example 1 in that an equal amount of diatomaceous earth is used in this example to replace the functional additive.

[0049] Comparative Example 2 is different from Example 1 in that in the process of preparing the functional additive, an equal mass of distilled water is used instead of the polyhexamethylene guanidine salt aqueous solution.

[0050] Performance test: The relevant properties of the corrugated paperboard samples provided in Examples 1 to 3 and Comparative Examples 1 to 2 were tested respectively, and the test data obtained were recorded in the following table:

[0051]

[0052] By comparing and analyzing the relevant data in the table, it can be seen that the corrugated paperboard produced by the present invention not only has excellent mechanical properties but also has good antibacterial properties, which ensures its quality and prolongs its service life to a certain extent. This shows that the high-compression corrugated paperboard and its production process provided by the present invention have a broader market prospect and are more suitable for promotion.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A production process for high-pressure corrugated board base paper, characterized in that: The following steps are involved: Step 1: transport the Class A domestic waste paper to a pulper and inject water into it, mix it evenly and then perform pulping treatment; then use a sediment well, an impurity separator and a drum screen to separate the large-volume impurities therein, and store the obtained pulp for future use; Step 2, screening and purifying the pulp obtained in step 1; transferring the purified pulp into a multi-disc thickening device for washing and concentration to obtain a concentrated pulp liquid with a concentration of 5 to 8 wt%; Step 3, adding 2-3% of the mass of the composite nano powder, 4-6% of carboxymethyl cellulose, 5-8% of zinc borate, 2-3% of emulsified silicone oil, 3-5% of sodium lignin sulfonate, 2.5-3.5% of alkyl ketene dimer, 4-5% of polyacrylamide, 2-5% of mildewproof agent, 20-25% of fiber reinforcement and 8-12% of functional additives to the concentrated pulp obtained in step 2, mixing and stirring evenly, and conveying the obtained mixed pulp to a papermaking workshop, and successively undergoing mesh forming, pressing, drying, surface sizing and drying treatment to finally obtain a high-compression corrugated board base paper product.

2. The production process of high-pressure corrugated board base paper according to claim 1, characterized in that: The purification process uses a one-stage medium-concentration cleaner and a four-stage low-concentration cleaner; and the screening process uses a four-stage coarse screening-three-stage fine screening process.

3. The production process of high-pressure corrugated board base paper according to claim 2, characterized in that: The concentration of the pulp in the low-concentration cleaner is 1.5-1.8wt%, and the ash content of the pulp is 8-12%; the sieve width of the fine screen is 0.12-0.15mm, and the concentration of the pulp after the fine screen is 0.6-1.0wt%.

4. The production process of high-pressure corrugated board base paper according to claim 1, characterized in that: The preparation method of the functional additive comprises the following steps: The first step is to add diatomaceous earth into distilled water at a solid-liquid ratio of 30 to 80 g / L, and then add 3-glycidyloxypropyltriethoxysilane with a mass of 0.3 to 0.5 times that of the diatomaceous earth, mix and stir evenly, and then stir and react at a temperature of 60 to 80° C. for 5 to 10 hours; after the reaction is completed, the obtained product components are separated into solid and liquid, and the obtained filter cake is washed with distilled water and ethanol for 2 to 3 times respectively, and then dried, and the obtained solid powder is stored and used for standby; The second step is to evenly disperse the solid powder in a polyhexamethyleneguanidine salt aqueous solution with a concentration of 2 to 3 wt% at a solid-liquid ratio of 20 to 50 g / L, then add an antibacterial agent with a mass of 0.3 to 0.5 of the solid powder, mix and stir evenly, and then keep warm and stir at a temperature of 40 to 50° C. for 2 to 3 days; after the reaction is completed, centrifuge and wash and dry the resulting components in turn, and the final product is the functional additive product.

5. The production process of high-pressure corrugated paperboard according to claim 1, characterized in that: The composite nano powder is prepared by mixing nano titanium dioxide and nano zinc oxide in a mass ratio of 1:1-2.

6. The production process of high-pressure corrugated paperboard according to claim 1, characterized in that: The mildew preventer is selected from any one of caprylhydroxamic acid, kasone and glyceryl caprylate.

7. The production process of high-pressure corrugated paperboard according to claim 1, characterized in that: The fiber reinforcement is selected from any one of sepiolite fiber and brucite fiber.

8. The production process of high-pressure corrugated paperboard according to claim 1, characterized in that: The sizing agent used in the surface sizing is any one of cationic polyacrylamide and polyamide polyurea resin; and the amount used is 3-6kg / ton of paper.

9. The production process of high-pressure corrugated board base paper according to claim 4, characterized in that: The antibacterial agent is selected from any one of dodecylbenzyldimethylammonium chloride, dodecyltrimethylammonium chloride and didecyldimethylammonium chloride.

10. A high-compression corrugated board base paper, characterized in that: The high-pressure-resistant corrugated board base paper is produced by the production process of any one of claims 1 to 9.

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