CN111622002A - Recycled paper manufacturing method and recycled paper - Google Patents
Recycled paper manufacturing method and recycled paper Download PDFInfo
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- CN111622002A CN111622002A CN201910148687.6A CN201910148687A CN111622002A CN 111622002 A CN111622002 A CN 111622002A CN 201910148687 A CN201910148687 A CN 201910148687A CN 111622002 A CN111622002 A CN 111622002A
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- paper
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- pulp
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- recycled paper
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- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
-
- 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
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/14—Secondary fibres
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/53—Polyethers; Polyesters
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
- D21H17/74—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic and inorganic material
-
- 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
- D21H21/16—Sizing or water-repelling agents
-
- 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
- D21H21/34—Ignifugeants
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- 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 discloses a method for manufacturing recycled paper, which relates to the technical field of waste paper processing and comprises the following steps: step A: paper shredding, step B: preparing a magnesium hydroxide flame retardant, and step C: washing the pulp, and step D: color preparation and step E: fishing the slurry, and step F: pressing and baking, and step G: and (5) drying. The invention also discloses recycled paper which comprises the following components in percentage by mass: waste paper: 86-88% of calcium carbonate: 3-5% of water-soluble high-molecular polymer: 2-3.2% of styrene-butadiene latex: 0.8-3%, starch: 1-1.6% of an auxiliary agent: 0.4-0.6%, phytochrome essence: 1.0-1.4%, theophylline 0.5-0.9%, and a flame retardant: 0.5 to 1.1 percent. According to the invention, the waterproof agent is added in the papermaking process, so that the regenerated paper achieves the effects of water repellency and water resistance, and the magnesium hydroxide flame retardant is used, so that the regenerated paper has high temperature resistance and fireproof performance, and the integrity of the regenerated paper can be kept.
Description
Technical Field
The invention relates to the technical field of recycled paper processing, in particular to a method for manufacturing recycled paper and the recycled paper.
Background
According to statistics, 850 kg of paper can be reproduced from one ton of waste paper, which is equivalent to cutting 17 big trees less, water can be saved by 100 tons, 1 and 2 tons of coal can be saved, 600 degrees of electricity can be saved, 35% of water pollution can be reduced, and about 20 trees with the age of 20-40 years need to be cut down for manufacturing one ton of paper. If half of office paper used in the world today is recycled, 75% of the new paper demand can be met, which is equivalent to 800 ten thousand hectares of forests being saved from felling. According to the calculation of green and plain structure, compared with the use of 1 ton of all wood pulp paper, the use of 1 ton of 100 percent recycled paper can reduce the emission of 11.37 tons of carbon dioxide | because the utilization of the waste paper is significant, the utilization rate of the waste paper in China is greatly improved in recent years, but the existing recycled paper manufactured by using the waste paper has the defects of poor waterproof effect and poor fire resistance.
Therefore, it is necessary to provide a method for producing recycled paper and recycled paper to solve the above problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for manufacturing recycled paper and the recycled paper, which solve the problems of poor waterproof effect and poor fire resistance of the conventional recycled paper manufactured by using waste paper.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for manufacturing recycled paper, characterized by comprising the following steps:
step A: paper shredding: feeding sorted and purified waste paper into coarse shredding equipment, shredding the waste paper into 2.5-3.5 cm fragments, wherein the waste paper comes from yellow board paper, crushing the fragments obtained by the coarse shredding equipment by using a crusher, pouring the crushed fragments into a pulping machine, mixing the crushed fragments with water, grinding the fragments into paper pulp by grinding, primarily filtering the ground paper pulp by using a filter screen, stirring for 20-30 min, filtering to prepare recycled pulp, and keeping the prepared recycled pulp to be continuously stirred for 8-12 min;
and B: preparing a magnesium hydroxide flame retardant: adding 0.2-0.6 g of magnesium hydroxide powder into 20-40 ml of long-chain alkyl acid ethanol solution, wherein the concentration of the long-chain alkyl acid is 5mM, and stirring for 1-2 h at room temperature; performing suction filtration, and cleaning with deionized water and ethanol to obtain the magnesium hydroxide flame retardant;
and C: washing the oar: adding a waterproof agent and a magnesium hydroxide flame retardant into the paper pulp for pulp washing;
step D: color preparation: adding plant pigment essence into the paper pulp, and fully and uniformly stirring by using a stirrer;
step E: fishing the pulp, namely putting the silk below, putting the wood frame above, and padding rag below, pouring the well-stirred paper pulp into a machine for shaking up, and fishing the pulp by using a pulp fishing machine when mass production is carried out;
step F: pressing and baking: pressing and flattening the prepared recycled paper at the temperature of 60-70 ℃, wherein the pressure applied to the upper surface of the recycled paper is 600-800 MP;
step G: drying: and further drying the recycled paper by using a dryer.
Optionally, the water-proofing agent in the step C is a mixture of calcium carbonate, water-soluble high molecular polymer, styrene-butadiene latex, starch, an auxiliary agent and theophylline.
Optionally, the drying temperature in the step G is 80-90 ℃.
Optionally, the grinding time in the step A is 9-15 min.
The recycled paper is characterized by comprising the following components (in percentage by mass): waste paper: 86-88% of calcium carbonate: 3-5% of water-soluble high-molecular polymer: 2-3.2% of styrene-butadiene latex: 0.8-3%, starch: 1-1.6% of an auxiliary agent: 0.4-0.6%, phytochrome essence: 1.0-1.4%, theophylline 0.5-0.9%, and a flame retardant: 0.5-1.1%, wherein the starch comprises the following components (by mass percent): oxidized starch: 0.66-0.96% of native starch: 0.34-0.64%. .
Optionally, the composition comprises the following components (in percentage by mass): waste paper: 86% and calcium carbonate: 5%, kaolin: 2% of styrene-butadiene latex: 3% and starch: 1% and auxiliary agent: 0.6%, phytochrome essence: 1.0%, theophylline 0.9% and a flame retardant 0.5%, wherein the starch comprises the following components (by mass percent): oxidized starch: 0.66%, native starch: 0.34 percent.
Optionally, the composition comprises the following components (in percentage by mass): waste paper: 87%, calcium carbonate: 4%, kaolin: 2.6% and styrene-butadiene latex: 1.9%, starch: 1.3% and auxiliary agents: 0.5%, phytochrome essence: 1.2%, theophylline 0.7% and a flame retardant 0.8%, wherein the starch comprises the following components (in percentage by mass): oxidized starch: 0.81%, native starch: 0.49 percent.
Optionally, the composition comprises the following components (in percentage by mass): waste paper: 88%, calcium carbonate: 3% of kaolin: 3.2% and styrene-butadiene latex: 0.8%, starch: 1.6% and auxiliary agents: 0.4%, phytochrome essence: 1.4%, theophylline 0.5% and a flame retardant 1.1%, wherein the starch comprises the following components (in percentage by mass): oxidized starch: 0.96%, native starch: 0.64 percent.
Optionally, the auxiliary agent is prepared by mixing liquid caustic soda and a deinking agent.
(III) advantageous effects
The invention provides a method for manufacturing recycled paper and the recycled paper, which have the following beneficial effects:
(1) the waterproof agent is added in the papermaking process, so that the regenerated paper achieves the effects of water repellency and water resistance, and the magnesium hydroxide flame retardant is used, so that the regenerated paper has high temperature resistance and fireproof performance, and the integrity of the regenerated paper can be kept.
(2) The invention utilizes waste, saves energy, protects environment, is sanitary, safe and reliable, saves tree resources, protects ecological environment, and has simple production technology and convenient operation.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a method for manufacturing recycled paper, characterized by comprising the following steps:
step A: paper shredding: feeding sorted and purified waste paper into coarse shredding equipment to shred the waste paper into 2.5cm fragments, wherein the waste paper is made from yellow board paper, crushing the fragments obtained by the coarse shredding equipment by using a crusher, pouring the crushed fragments into a pulping machine to be mixed with water for grinding, grinding the fragments into paper pulp by grinding, primarily filtering the ground paper pulp by a filter screen, stirring for 20min, filtering to prepare recycled pulp, and keeping the prepared recycled pulp to be continuously stirred for 8 min;
and B: preparing a magnesium hydroxide flame retardant: adding 0.2g of magnesium hydroxide powder into 20ml of long-chain alkyl acid ethanol solution, wherein the concentration of the long-chain alkyl acid is 5mM, and stirring for 1h at room temperature; performing suction filtration, and cleaning with deionized water and ethanol to obtain the magnesium hydroxide flame retardant;
and C: washing the oar: adding a waterproof agent and a magnesium hydroxide flame retardant into the paper pulp for pulp washing;
step D: color preparation: adding plant pigment essence into the paper pulp, and fully and uniformly stirring by using a stirrer;
step E: fishing the pulp, namely putting the silk below, putting the wood frame above, and padding rag below, pouring the well-stirred paper pulp into a machine for shaking up, and fishing the pulp by using a pulp fishing machine when mass production is carried out;
step F: pressing and baking: pressing the prepared recycled paper to be flat at the temperature of 60 ℃, wherein the pressure applied to the upper surface of the recycled paper is 600 MP;
step G: drying: and further drying the recycled paper by using a dryer.
As an optional technical scheme of the invention:
the waterproofing agent in the step C is a mixture prepared from calcium carbonate, water-soluble high molecular polymer, styrene-butadiene latex, starch, an auxiliary agent and theophylline.
As an optional technical scheme of the invention:
the drying temperature in step G was 80 ℃.
As an optional technical scheme of the invention:
the grinding time in step A was 9 min.
The recycled paper is characterized by comprising the following components (in percentage by mass): waste paper: 86% and calcium carbonate: 5%, kaolin: 2% of styrene-butadiene latex: 3% and starch: 1% and auxiliary agent: 0.6%, phytochrome essence: 1.0%, theophylline 0.9% and a flame retardant 0.5%, wherein the starch comprises the following components (by mass percent): oxidized starch: 0.66%, native starch: 0.34 percent.
As an optional technical scheme of the invention:
the assistant is prepared by mixing liquid alkali and deinking agent.
Example 2:
a method for manufacturing recycled paper, characterized by comprising the following steps:
step A: paper shredding: feeding sorted and purified waste paper into coarse shredding equipment to shred the waste paper into 3.0cm fragments, wherein the waste paper is made from yellow board paper, crushing the fragments obtained by the coarse shredding equipment by using a crusher, pouring the crushed fragments into a pulping machine to be mixed with water for grinding, grinding the fragments into paper pulp by grinding, primarily filtering the ground paper pulp by a filter screen, stirring for 25min, filtering to prepare recycled pulp, and keeping the prepared recycled pulp to be continuously stirred for 10 min;
and B: preparing a magnesium hydroxide flame retardant: adding 0.4g of magnesium hydroxide powder into 30ml of long-chain alkyl acid ethanol solution, wherein the concentration of the long-chain alkyl acid is 5mM, and stirring at room temperature for 1.5 h; performing suction filtration, and cleaning with deionized water and ethanol to obtain the magnesium hydroxide flame retardant;
and C: washing the oar: adding a waterproof agent and a magnesium hydroxide flame retardant into the paper pulp for pulp washing;
step D: color preparation: adding plant pigment essence into the paper pulp, and fully and uniformly stirring by using a stirrer;
step E: fishing the pulp, namely putting the silk below, putting the wood frame above, and padding rag below, pouring the well-stirred paper pulp into a machine for shaking up, and fishing the pulp by using a pulp fishing machine when mass production is carried out;
step F: pressing and baking: pressing the prepared recycled paper to be flat at the temperature of 65 ℃, wherein the pressure applied to the upper surface of the recycled paper is 700 MP;
step G: drying: and further drying the recycled paper by using a dryer.
As an optional technical scheme of the invention:
the waterproofing agent in the step C is a mixture prepared from calcium carbonate, water-soluble high molecular polymer, styrene-butadiene latex, starch, an auxiliary agent and theophylline.
As an optional technical scheme of the invention:
the drying temperature in step G was 85 ℃.
As an optional technical scheme of the invention:
the grinding time in step A was 12 min.
The recycled paper is characterized by comprising the following components (in percentage by mass): waste paper: 87%, calcium carbonate: 4%, kaolin: 2.6% and styrene-butadiene latex: 1.9%, starch: 1.3% and auxiliary agents: 0.5%, phytochrome essence: 1.2%, theophylline 0.7% and a flame retardant 0.8%, wherein the starch comprises the following components (in percentage by mass): oxidized starch: 0.81%, native starch: 0.49 percent.
As an optional technical scheme of the invention:
the assistant is prepared by mixing liquid alkali and deinking agent.
Example 3:
a method for manufacturing recycled paper, characterized by comprising the following steps:
step A: paper shredding: feeding sorted and purified waste paper into coarse shredding equipment to shred the waste paper into 3.5cm fragments, wherein the waste paper is made from yellow board paper, crushing the fragments obtained by the coarse shredding equipment by using a crusher, pouring the crushed fragments into a pulping machine to be mixed with water for grinding, grinding the fragments into paper pulp by grinding, primarily filtering the ground paper pulp by a filter screen, stirring for 30min, filtering to prepare recycled pulp, and keeping the prepared recycled pulp to be continuously stirred for 12 min;
and B: preparing a magnesium hydroxide flame retardant: adding 0.6g of magnesium hydroxide powder into 40ml of long-chain alkyl acid ethanol solution, wherein the concentration of the long-chain alkyl acid is 5mM, and stirring for 2h at room temperature; performing suction filtration, and cleaning with deionized water and ethanol to obtain the magnesium hydroxide flame retardant;
and C: washing the oar: adding a waterproof agent and a magnesium hydroxide flame retardant into the paper pulp for pulp washing;
step D: color preparation: adding plant pigment essence into the paper pulp, and fully and uniformly stirring by using a stirrer;
step E: fishing the pulp, namely putting the silk below, putting the wood frame above, and padding rag below, pouring the well-stirred paper pulp into a machine for shaking up, and fishing the pulp by using a pulp fishing machine when mass production is carried out;
step F: pressing and baking: pressing the prepared recycled paper to be flat at the temperature of 70 ℃, wherein the pressure applied to the upper surface of the recycled paper is 800 MP;
step G: drying: and further drying the recycled paper by using a dryer.
As an optional technical scheme of the invention:
the waterproofing agent in the step C is a mixture prepared from calcium carbonate, water-soluble high molecular polymer, styrene-butadiene latex, starch, an auxiliary agent and theophylline.
As an optional technical scheme of the invention:
the drying temperature in step G was 90 ℃.
As an optional technical scheme of the invention:
the grinding time in step A was 15 min.
The recycled paper is characterized by comprising the following components (in percentage by mass): waste paper: 88%, calcium carbonate: 3% of kaolin: 3.2% and styrene-butadiene latex: 0.8%, starch: 1.6% and auxiliary agents: 0.4%, phytochrome essence: 1.4%, theophylline 0.5% and a flame retardant 1.1%, wherein the starch comprises the following components (in percentage by mass): oxidized starch: 0.96%, native starch: 0.64 percent.
As an optional technical scheme of the invention:
the assistant is prepared by mixing liquid alkali and deinking agent.
The paper products processed from the pulps prepared in the three groups of examples were subjected to performance tests, and the test results are shown in the following table:
| example 1 | Example 2 | Example 3 | |
| Water-proof ability | In general | Is very strong | Is stronger |
| Flame retardant ability | Is higher than | Is very high | In general |
Recycled paper can be prepared by the three groups of examples, wherein the recycled paper prepared by the second group of examples has the best waterproof and flame retardant capabilities.
It is noted that in the present disclosure, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (9)
1. A method for manufacturing recycled paper, characterized by comprising the following steps:
step A: paper shredding: feeding sorted and purified waste paper into coarse shredding equipment, shredding the waste paper into 2.5-3.5 cm fragments, wherein the waste paper comes from yellow board paper, crushing the fragments obtained by the coarse shredding equipment by using a crusher, pouring the crushed fragments into a pulping machine, mixing the crushed fragments with water, grinding the fragments into paper pulp by grinding, primarily filtering the ground paper pulp by using a filter screen, stirring for 20-30 min, filtering to prepare recycled pulp, and keeping the prepared recycled pulp to be continuously stirred for 8-12 min;
and B: preparing a magnesium hydroxide flame retardant: adding 0.2-0.6 g of magnesium hydroxide powder into 20-40 ml of long-chain alkyl acid ethanol solution, wherein the concentration of the long-chain alkyl acid is 5mM, and stirring for 1-2 h at room temperature; performing suction filtration, and cleaning with deionized water and ethanol to obtain the magnesium hydroxide flame retardant;
and C: washing the oar: adding a waterproof agent and a magnesium hydroxide flame retardant into the paper pulp for pulp washing;
step D: color preparation: adding plant pigment essence into the paper pulp, and fully and uniformly stirring by using a stirrer;
step E: fishing the pulp, namely putting the silk below, putting the wood frame above, and padding rag below, pouring the well-stirred paper pulp into a machine for shaking up, and fishing the pulp by using a pulp fishing machine when mass production is carried out;
step F: pressing and baking: pressing and flattening the prepared recycled paper at the temperature of 60-70 ℃, wherein the pressure applied to the upper surface of the recycled paper is 600-800 MP;
step G: drying: and further drying the recycled paper by using a dryer.
2. The method for manufacturing recycled paper according to claim 1, wherein:
the waterproof agent in the step C is a mixture prepared from calcium carbonate, water-soluble high-molecular polymer, styrene-butadiene latex, starch, an auxiliary agent and theophylline.
3. The method for manufacturing recycled paper according to claim 1, wherein:
and G, drying at 80-90 ℃.
4. The method for manufacturing recycled paper according to claim 1, wherein:
and B, grinding time in the step A is 9-15 min.
5. The recycled paper is characterized by comprising the following components (in percentage by mass): waste paper: 86-88% of calcium carbonate: 3-5% of water-soluble high-molecular polymer: 2-3.2% of styrene-butadiene latex: 0.8-3%, starch: 1-1.6% of an auxiliary agent: 0.4-0.6%, phytochrome essence: 1.0-1.4%, theophylline 0.5-0.9%, and a flame retardant: 0.5-1.1%, wherein the starch comprises the following components (by mass percent): oxidized starch: 0.66-0.96% of native starch: 0.34-0.64%.
6. A recycled paper as claimed in claim 5, wherein:
comprises the following components (by mass percent): waste paper: 86% and calcium carbonate: 5%, kaolin: 2% of styrene-butadiene latex: 3% and starch: 1% and auxiliary agent: 0.6%, phytochrome essence: 1.0%, theophylline 0.9% and a flame retardant 0.5%, wherein the starch comprises the following components (by mass percent): oxidized starch: 0.66%, native starch: 0.34 percent.
7. A recycled paper as claimed in claim 5, wherein:
comprises the following components (by mass percent): waste paper: 87%, calcium carbonate: 4%, kaolin: 2.6% and styrene-butadiene latex: 1.9%, starch: 1.3% and auxiliary agents: 0.5%, phytochrome essence: 1.2%, theophylline 0.7% and a flame retardant 0.8%, wherein the starch comprises the following components (in percentage by mass): oxidized starch: 0.81%, native starch: 0.49 percent.
8. A recycled paper as claimed in claim 5, wherein:
comprises the following components (by mass percent): waste paper: 88%, calcium carbonate: 3% of kaolin: 3.2% and styrene-butadiene latex: 0.8%, starch: 1.6% and auxiliary agents: 0.4%, phytochrome essence: 1.4%, theophylline 0.5% and a flame retardant 1.1%, wherein the starch comprises the following components (in percentage by mass): oxidized starch: 0.96%, native starch: 0.64 percent.
9. A recycled paper as claimed in claim 5, wherein:
the auxiliary agent is prepared by mixing liquid caustic soda and a deinking agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910148687.6A CN111622002A (en) | 2019-02-28 | 2019-02-28 | Recycled paper manufacturing method and recycled paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910148687.6A CN111622002A (en) | 2019-02-28 | 2019-02-28 | Recycled paper manufacturing method and recycled paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111622002A true CN111622002A (en) | 2020-09-04 |
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| CN201910148687.6A Pending CN111622002A (en) | 2019-02-28 | 2019-02-28 | Recycled paper manufacturing method and recycled paper |
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