阅读说明：本技术 一种再生纸制造方法及再生纸 (Recycled paper manufacturing method and recycled paper ) 是由 周锦莹 周操 钟新刚 于 2019-02-28 设计创作，主要内容包括：本发明公开了一种再生纸的制造方法,涉及废纸加工技术领域,包括以下步骤：步骤A：碎纸、步骤B：制备氢氧化镁阻燃剂、步骤C：洗桨、步骤D：制色、步骤E：捞浆、步骤F：压烘、步骤G：烘干。本发明还公开了一种再生纸,包括以下成分(按质量百分比)：废纸：86～88％、碳酸钙：3～5％、水溶性高分子聚合物：2～3.2％、丁苯胶乳：0.8～3％、淀粉：1～1.6％、助剂：0.4～0.6％、植物色素精：1.0～1.4％、茶碱0.5～0.9％、阻燃剂：0.5～1.1％。本发明通过在造纸过程中加入防水剂,能够使该再生纸达到了拒水和防水的效果,通过氢氧化镁阻燃剂的使用,能够使该再生纸具有耐高温和防火性能,从而能够使该再生纸保持完整性。(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.)

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.

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.