CN111826991A - Production process of high-strength corrugated paper - Google Patents
Production process of high-strength corrugated paper Download PDFInfo
- Publication number
- CN111826991A CN111826991A CN202010799888.5A CN202010799888A CN111826991A CN 111826991 A CN111826991 A CN 111826991A CN 202010799888 A CN202010799888 A CN 202010799888A CN 111826991 A CN111826991 A CN 111826991A
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- Prior art keywords
- pulp
- screening
- bamboo
- waste paper
- papermaking
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/12—Making corrugated paper or board
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/32—Defibrating by other means of waste paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Abstract
The invention relates to a production process of high-strength corrugated paper, which comprises the following steps: (1) obtaining waste paper pulp from waste paper; (2) obtaining bamboo pulp from bamboo stalks; (3) mixing waste paper pulp and bamboo pulp, and adding cationic starch and cellulose powder to obtain papermaking primary pulp; (4) adding the reinforcing agent and the auxiliary agent into the papermaking primary pulp and uniformly stirring to obtain papermaking pulp; (5) sequentially carrying out papermaking forming, dewatering, drying, surface sizing and drying again on the papermaking slurry to obtain a corrugated paper finished product; the bamboo culms are subjected to double grinding, bamboo fibers can be separated to the greatest extent, the utilization rate of bamboo culm raw materials is improved, energy is saved, the environment is protected, reinforcing fiber powder is added into mixed pulp, the gram weight of corrugated paper can be reduced, the strength of the corrugated paper can be ensured, a reinforcing agent formed by polymerizing cationic polyacrylamide, hydroxypropyl chitosan and epoxy chloropropane resin is added, the electrostatic interaction among the pulp can be enhanced, and the strength of the corrugated paper is further improved.
Description
Technical Field
The invention belongs to the technical field of corrugated paper, and particularly relates to a production process of high-strength corrugated paper.
Background
The corrugated base paper is one of important constituent materials for producing corrugated boards, and is required to have good fiber bonding strength, flat paper surface, better tightness and stiffness and certain elasticity so as to ensure that the manufactured carton has shockproof and pressure resistance.
The existing corrugated base paper production process has insufficient extraction degree of fibers in raw materials, waste of the raw materials is easily caused, and the prepared corrugated base paper has low strength, so that the phenomenon that the corrugated base paper can bear small stress and is easy to collapse after being made into a carton is caused.
Disclosure of Invention
The invention aims to provide a production process of high-strength corrugated paper.
The invention relates to a production process of high-strength corrugated paper, which comprises the following steps:
(1) cutting waste paper into pieces, adding clear water for soaking for 30-40 min, pulping to dissociate the waste paper, feeding the waste paper into a high-concentration slag separator for slag removal, feeding the waste paper into a coarse screening device, a fine screening device and a sand removal device in sequence for coarse screening, fine screening and sand removal after slag removal, and pulping to obtain waste paper pulp;
(2) soaking bamboo stalks in an alkaline aqueous solution, carrying out pulping treatment after soaking for 2-4 h, carrying out first-stage pulp grinding after pulping, wherein the clearance of the first-stage pulp grinding is 0.4-0.6 mm, carrying out second-stage pulp grinding on pulp obtained after the first-stage pulp grinding, wherein the clearance of the second-stage pulp grinding is 0.02-0.04 mm, carrying out pulp screening treatment on the pulp obtained after the second-stage pulp grinding, and adjusting the pH value of the pulp obtained after pulp screening to be neutral to obtain bamboo pulp;
(3) stirring or oscillating the waste paper pulp and the bamboo pulp to uniformly mix the waste paper pulp and the bamboo pulp, wherein the mass ratio of the waste paper pulp to the bamboo pulp is 1:1 to obtain mixed pulp, adding cationic starch and cellulose powder into the mixed pulp and uniformly stirring, and the weight ratio of the mixed pulp, the cationic starch and the cellulose powder is 30:1:1 to obtain papermaking primary pulp;
(4) polymerizing cationic polyacrylamide, hydroxypropyl chitosan, epichlorohydrin resin, a cross-linking agent and a coupling agent to obtain a reinforcing agent, mixing rosin, alum, sodium carbonate and a polymeric flocculant according to a mass ratio of 20:6:6: 1 to obtain an auxiliary agent, adding the reinforcing agent and the auxiliary agent into papermaking primary pulp, uniformly stirring, and obtaining papermaking primary pulp, the reinforcing agent and a retention aid according to a weight ratio of 1000:1:2 to obtain papermaking pulp;
(5) and (3) sequentially conveying the papermaking slurry to a net part, a pressing part, a primary drying cylinder part, a sizing machine and a secondary drying cylinder part for papermaking forming, dewatering, drying, surface sizing and drying again to obtain a corrugated paper finished product.
Further, the apparatus for subjecting used paper to a pulp crushing process in step (1) and the apparatus for subjecting used paper to a pulp crushing process in step (2) are both hydropulper.
Furthermore, the beating degree of the waste paper pulp in the step (1) is about 35-40 DEG SR, and the wet weight of the fiber is 3-3.58.
Further, the concentration of the aqueous alkali solution in the step (2) is 3% -8%, and the aqueous alkali solution is sodium hydroxide solution or potassium hydroxide solution or a mixed solution of sodium hydroxide and potassium hydroxide.
Further, the step (2) of adjusting the PH value of the slurry obtained after the slurry screening to be neutral specifically comprises: if the pH value of the slurry obtained after the slurry screening is 7-8, washing the slurry obtained after the slurry screening by adding clear water, and adjusting the pH value of the slurry obtained after the slurry screening to be neutral; and if the pH value of the slurry obtained after screening is more than 8, adding a hydrochloric acid solution into the slurry obtained after screening for neutralization, and then washing with clear water to adjust the pH value of the slurry obtained after screening to be neutral.
Further, after obtaining the papermaking primary pulp in the step (4), the method further comprises the following steps: adding silicon dioxide, vinyl acetate and polyethylene fibers into the papermaking primary pulp and uniformly stirring.
The invention has the beneficial effects that the waste paper is recycled, the waste of resources is reduced, the bamboo fiber can be separated to the maximum extent by carrying out double grinding on the bamboo stalks, the utilization rate of the bamboo stalk raw material is improved, the bamboo stalk pulp is more energy-saving and environment-friendly, the gram weight of the corrugated paper can be reduced by adding the reinforcing fiber powder into the mixed pulp, the strength of the corrugated paper can be ensured, the electrostatic action among the pulp can be enhanced by adding the reinforcing agent formed by polymerizing the cationic polyacrylamide, hydroxypropyl chitosan and epoxy chloropropane resin, and the strength of the corrugated paper is further improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
The invention provides a production process of high-strength corrugated paper, which comprises the following steps:
(1) cutting waste paper into pieces, adding clear water for soaking for 30-40 min, pulping to dissociate the waste paper, feeding the waste paper into a high-concentration slag separator for slag removal, feeding the waste paper into a coarse screening device, a fine screening device and a sand removal device in sequence for coarse screening, fine screening and sand removal after slag removal, and pulping to obtain waste paper pulp; in order to ensure the pulping effect, the device for pulping the waste paper in the step (1) is a hydrapulper, the pulping degree of the waste paper pulp is about 35-40 DEG SR, and the wet weight of the fiber is 3-3.58.
(2) Soaking the bamboo stalks in an alkaline water solution, wherein the concentration of the alkaline water solution is preferably 3-8%, and the alkaline water solution is a sodium hydroxide solution or a potassium hydroxide solution or a mixed solution of sodium hydroxide and potassium hydroxide; the bamboo stalks are soaked for 2 to 4 hours and then pulped, and a device for pulping the bamboo stalks is a hydrapulper; carrying out first-stage pulp grinding after pulp crushing, wherein the clearance of the first-stage pulp grinding is 0.4-0.6 mm, carrying out second-stage pulp grinding on the pulp obtained after the first-stage pulp grinding, wherein the clearance of the second-stage pulp grinding is 0.02-0.04 mm, carrying out pulp screening treatment on the pulp obtained after the second-stage pulp grinding, and adjusting the pH value of the pulp obtained after pulp screening to be neutral to obtain bamboo pulp; if the pH value of the slurry obtained after screening is 7-8, washing the slurry obtained after screening by adding clear water, and adjusting the pH value of the slurry obtained after screening to be neutral; and if the pH value of the slurry obtained after screening is more than 8, adding a hydrochloric acid solution into the slurry obtained after screening for neutralization, and then washing with clear water to adjust the pH value of the slurry obtained after screening to be neutral. Through carrying out first-stage grinding and second-stage grinding on the bamboo stalks, namely, carrying out double grinding, the bamboo fibers can be separated to the greatest extent, the utilization rate of the bamboo stalk raw materials is improved, and the bamboo stalk grinding machine is more energy-saving and environment-friendly.
(3) Stirring or oscillating the waste paper pulp and the bamboo pulp to uniformly mix the waste paper pulp and the bamboo pulp, wherein the mass ratio of the waste paper pulp to the bamboo pulp is 1:1 to obtain mixed pulp, adding cationic starch and cellulose powder into the mixed pulp and uniformly stirring, and the weight ratio of the mixed pulp, the cationic starch and the cellulose powder is 30:1:1 to obtain papermaking primary pulp; after obtaining the paper making primary pulp, adding silicon dioxide, vinyl acetate and polyethylene fibers into the paper making primary pulp and stirring uniformly.
(4) Polymerizing cationic polyacrylamide, hydroxypropyl chitosan, epichlorohydrin resin, a cross-linking agent and a coupling agent to obtain a reinforcing agent, mixing rosin, alum, sodium carbonate and a high-molecular flocculating agent according to the mass ratio of 20:6:6: 1 of the cationic polyacrylamide, the hydroxypropyl chitosan, the epichlorohydrin resin, the cross-linking agent and the coupling agent to obtain an auxiliary agent, adding the reinforcing agent and the auxiliary agent into the papermaking primary pulp, uniformly stirring, and obtaining the papermaking primary pulp, the reinforcing agent and the retention aid according to the weight ratio of 1000:1:2 to obtain papermaking pulp;
(5) and (3) sequentially conveying the papermaking slurry to a net part, a pressing part, a primary drying cylinder part, a sizing machine and a secondary drying cylinder part for papermaking forming, dewatering, drying, surface sizing and drying again to obtain a corrugated paper finished product.
According to the production process of the high-strength corrugated paper, waste paper is recycled, waste of resources is reduced, bamboo fibers can be separated to the maximum extent by performing double grinding on bamboo stalks, the utilization rate of bamboo stalk raw materials is improved, the production process is more energy-saving and environment-friendly, the gram weight of the corrugated paper can be reduced by adding the reinforcing fiber powder into the mixed pulp, the strength of the corrugated paper can be ensured, the electrostatic action among pulp can be enhanced by adding the reinforcing agent formed by polymerizing the cationic polyacrylamide, hydroxypropyl chitosan and epoxy chloropropane resin, and the strength of the corrugated paper is further improved.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (6)
1. A production process of high-strength corrugated paper is characterized by comprising the following steps:
(1) cutting waste paper into pieces, adding clear water for soaking for 30-40 min, pulping to dissociate the waste paper, feeding the waste paper into a high-concentration slag separator for slag removal, feeding the waste paper into a coarse screening device, a fine screening device and a sand removal device in sequence for coarse screening, fine screening and sand removal after slag removal, and pulping to obtain waste paper pulp;
(2) soaking bamboo stalks in an alkaline aqueous solution, carrying out pulping treatment after soaking for 2-4 h, carrying out first-stage pulp grinding after pulping, wherein the clearance of the first-stage pulp grinding is 0.4-0.6 mm, carrying out second-stage pulp grinding on pulp obtained after the first-stage pulp grinding, wherein the clearance of the second-stage pulp grinding is 0.02-0.04 mm, carrying out pulp screening treatment on the pulp obtained after the second-stage pulp grinding, and adjusting the pH value of the pulp obtained after pulp screening to be neutral to obtain bamboo pulp;
(3) stirring or oscillating the waste paper pulp and the bamboo pulp to uniformly mix the waste paper pulp and the bamboo pulp, wherein the mass ratio of the waste paper pulp to the bamboo pulp is 1:1 to obtain mixed pulp, adding cationic starch and cellulose powder into the mixed pulp and uniformly stirring, and the weight ratio of the mixed pulp, the cationic starch and the cellulose powder is 30:1:1 to obtain papermaking primary pulp;
(4) polymerizing cationic polyacrylamide, hydroxypropyl chitosan, epichlorohydrin resin, a cross-linking agent and a coupling agent to obtain a reinforcing agent, mixing rosin, alum, sodium carbonate and a polymeric flocculant according to a mass ratio of 20:6:6: 1 to obtain an auxiliary agent, adding the reinforcing agent and the auxiliary agent into papermaking primary pulp, uniformly stirring, and obtaining papermaking primary pulp, the reinforcing agent and a retention aid according to a weight ratio of 1000:1:2 to obtain papermaking pulp;
(5) and (3) sequentially conveying the papermaking slurry to a net part, a pressing part, a primary drying cylinder part, a sizing machine and a secondary drying cylinder part for papermaking forming, dewatering, drying, surface sizing and drying again to obtain a corrugated paper finished product.
2. A process for producing high strength corrugated paper as defined in claim 1 wherein said means for repulping waste paper in step (1) and said means for repulping waste paper in step (2) are hydropulper.
3. The process for producing high-strength corrugated paper as claimed in claim 1, wherein the beating degree of the waste paper pulp in the step (1) is about 35 to 40 ° SR, and the wet weight of the fiber is 3 to 3.58.
4. The process for producing high-strength corrugated paper as claimed in claim 1, wherein the concentration of the aqueous alkali solution in the step (2) is 3% to 8%, and the aqueous alkali solution is a sodium hydroxide solution or a potassium hydroxide solution or a mixed solution of sodium hydroxide and potassium hydroxide.
5. The process for producing high-strength corrugated paper as claimed in claim 1, wherein the step (2) of adjusting the PH of the pulp obtained after the pulp screening to be neutral is specifically: if the pH value of the slurry obtained after the slurry screening is 7-8, washing the slurry obtained after the slurry screening by adding clear water, and adjusting the pH value of the slurry obtained after the slurry screening to be neutral; and if the pH value of the slurry obtained after screening is more than 8, adding a hydrochloric acid solution into the slurry obtained after screening for neutralization, and then washing with clear water to adjust the pH value of the slurry obtained after screening to be neutral.
6. The process for producing high strength corrugated paper as defined in claim 1, wherein said step (4) further comprises, after obtaining the paper-making virgin pulp: adding silicon dioxide, vinyl acetate and polyethylene fibers into the papermaking primary pulp and uniformly stirring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010799888.5A CN111826991A (en) | 2020-08-11 | 2020-08-11 | Production process of high-strength corrugated paper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010799888.5A CN111826991A (en) | 2020-08-11 | 2020-08-11 | Production process of high-strength corrugated paper |
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| Publication Number | Publication Date |
|---|---|
| CN111826991A true CN111826991A (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010799888.5A Pending CN111826991A (en) | 2020-08-11 | 2020-08-11 | Production process of high-strength corrugated paper |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113529470A (en) * | 2021-07-23 | 2021-10-22 | 东莞顺裕纸业有限公司 | Production process of high-strength waterproof corrugated paper |
| CN113564951A (en) * | 2021-07-30 | 2021-10-29 | 漳州鑫圣源包装制品有限公司 | High-strength compression-resistant corrugated carton |
| CN113668282A (en) * | 2021-09-03 | 2021-11-19 | 广东理文造纸有限公司 | Preparation method of bamboo fiber boxboard paper pulp and prepared bamboo fiber boxboard paper pulp |
| CN113756122A (en) * | 2021-07-30 | 2021-12-07 | 东莞顺裕纸业有限公司 | Corrugated paper process for reducing surface glue failure |
| CN114635312A (en) * | 2022-03-25 | 2022-06-17 | 南京林业大学 | High-tightness corrugated base paper and preparation method thereof |
| CN114990922A (en) * | 2022-05-30 | 2022-09-02 | 浙江金励环保纸业有限公司 | High-strength bamboo fiber gray paperboard and production process thereof |
| CN116178799A (en) * | 2022-12-14 | 2023-05-30 | 衢州学院 | Bamboo fiber molding reinforced material and preparation method thereof |
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| CN107740305A (en) * | 2017-11-23 | 2018-02-27 | 齐鲁工业大学 | A kind of method that stalk prepares high-strength corrugated base paper |
| CN109518505A (en) * | 2018-12-17 | 2019-03-26 | 东莞顺裕纸业有限公司 | A kind of corrugating medium's production method of the raising fiber utilization rate using waste paper pulp-making |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113529470A (en) * | 2021-07-23 | 2021-10-22 | 东莞顺裕纸业有限公司 | Production process of high-strength waterproof corrugated paper |
| CN113564951A (en) * | 2021-07-30 | 2021-10-29 | 漳州鑫圣源包装制品有限公司 | High-strength compression-resistant corrugated carton |
| CN113756122A (en) * | 2021-07-30 | 2021-12-07 | 东莞顺裕纸业有限公司 | Corrugated paper process for reducing surface glue failure |
| CN113756122B (en) * | 2021-07-30 | 2024-03-19 | 东莞顺裕纸业有限公司 | Corrugated paper technology for reducing surface glue spreading |
| CN113668282A (en) * | 2021-09-03 | 2021-11-19 | 广东理文造纸有限公司 | Preparation method of bamboo fiber boxboard paper pulp and prepared bamboo fiber boxboard paper pulp |
| CN114635312A (en) * | 2022-03-25 | 2022-06-17 | 南京林业大学 | High-tightness corrugated base paper and preparation method thereof |
| CN114990922A (en) * | 2022-05-30 | 2022-09-02 | 浙江金励环保纸业有限公司 | High-strength bamboo fiber gray paperboard and production process thereof |
| CN116178799A (en) * | 2022-12-14 | 2023-05-30 | 衢州学院 | Bamboo fiber molding reinforced material and preparation method thereof |
| CN116178799B (en) * | 2022-12-14 | 2024-02-27 | 衢州学院 | Bamboo fiber molding reinforced material and preparation method thereof |
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Application publication date: 20201027 |