Method for producing copy paper from waste stainless steel lining paper

[0021] Example 1

[0022] A method for producing copy paper by using waste stainless steel lining paper. The specific production process is as follows: a. Softwood pulp is processed by a hydraulic pulper, a pulp tank, a disc refiner and a pulp pond; b. The waste stainless steel lining paper is manually sorted and sorted , disintegrating, dispersing and dispersing, screening, and desanding pretreatment, and then processed by hydraulic pulper, slurry tank, decomposing machine, pressure screen, desander, slurry tank, disc refiner, and slurry tank; c. Step a Together with the softwood pulp and waste stainless steel lining pulp treated in step b, it is sent to the pulp tank for treatment, and whitening agent, purple and blue dyes are added to the pulp tank, and then sent to the fore-washing tank for processing, and then into the pulp mixing tank. In the pulping box, add accelerator in the pulping box, then enter the pulping tank, add defoamer in the pulping tank, and then enter the head box, mesh cloth, pressing section, drying cylinder section, coiling section, distribution Cutting, packing, and warehousing processing, wherein, a cylinder stripping agent is added to the dryer section. The method of loosening the waste stainless steel lining pulp with a light knife and slow beating makes the fibers split and reducing the cutting; the soft wood pulp is beaten with a heavy knife and fast to improve the uniformity of the fibers; (1) Raw material ratio: waste stainless steel lining Paper: softwood pulp by weight = 6:4; (2) Requirements for beating process parameters: softwood pulp: beating concentration 4.5%, beating beating degree 90°SR, wet weight 5.0g; waste stainless steel lining pulp: beating concentration 5.0 %, beating beating degree 50°SR, wet weight 4.0g; (3) papermaking process: production variety: 15g/m 2 Copy paper, paper machine model: 2640mm Fourdrinier wire multi-cylinder thin paper machine, speed: 230m/min, online concentration: 0.25%; (4) Filler and chemical dosage: fluorescent whitening agent: 5.0kg/ton paper; purple , blue dye: 0.01kg/ton; accelerator: 0.3kg/ton paper; defoaming agent: 0.8kg/ton paper; peeling agent: 0.2kg/ton paper.

[0023] Embodiment 2

[0024] A method for producing copy paper by using waste stainless steel lining paper. The specific production process is as follows: a. Softwood pulp is processed by a hydraulic pulper, a pulp tank, a disc refiner and a pulp pond; b. The waste stainless steel lining paper is manually sorted and sorted , disintegrating, dispersing and dispersing, screening, and desanding pretreatment, and then processed by hydraulic pulper, slurry tank, decomposing machine, pressure screen, desander, slurry tank, disc refiner, and slurry tank; c. Step a Together with the softwood pulp and waste stainless steel lining pulp treated in step b, it is sent to the pulp tank for treatment, and whitening agent, purple and blue dyes are added to the pulp tank, and then sent to the fore-washing tank for processing, and then into the pulp mixing tank. In the pulping box, add accelerator in the pulping box, then enter the pulping tank, add defoamer in the pulping tank, and then enter the head box, mesh cloth, pressing section, drying cylinder section, coiling section, distribution Cutting, packing, and warehousing processing, wherein, a cylinder stripping agent is added to the dryer section. The waste stainless steel lining pulp is loosened with a light knife and slowly beaten, so that the fibers are divided into filaments to reduce cutting; the soft knife pulp is beaten with a heavy knife and fast to improve the uniformity of the fibers. Among them (1) raw materials: waste stainless steel lining paper: softwood pulp by weight = 7:3; (2) requirements for beating process parameters: softwood pulp: beating concentration 4.8%, beating beating degree 92°SR, wet weight 5.5 g; waste stainless steel lining pulp: beating concentration 5.3%, beating beating degree 53°SR, wet weight 4.5g; (3) papermaking process: production variety: 16g/m 2 Copy paper, paper machine model: 2640mm Fourdrinier wire multi-cylinder thin paper machine, speed: 240m/min, online concentration: 0.30%; (4) Filler and chemical dosage: fluorescent whitening agent: 7.0kg/ton paper; purple , blue dye: 0.5kg/ton; accelerator: 0.4kg/ton paper; defoaming agent: 0.9kg/ton paper; peeling agent: 0.25kg/ton paper.

[0025] Embodiment 3

[0026] A method for producing copy paper by using waste stainless steel lining paper. The specific production process is as follows: a. Softwood pulp is processed by a hydraulic pulper, a pulp tank, a disc refiner and a pulp pond; b. The waste stainless steel lining paper is manually sorted and sorted , disintegrating, dispersing and dispersing, screening, and desanding pretreatment, and then processed by hydraulic pulper, slurry tank, decomposing machine, pressure screen, desander, slurry tank, disc refiner, and slurry tank; c. Step a Together with the softwood pulp and waste stainless steel lining pulp treated in step b, it is sent to the pulp tank for treatment, and whitening agent, purple and blue dyes are added to the pulp tank, and then sent to the fore-washing tank for processing, and then into the pulp mixing tank. In the pulping box, add accelerator in the pulping box, then enter the pulping tank, add defoamer in the pulping tank, and then enter the head box, mesh cloth, pressing section, drying cylinder section, coiling section, distribution Cutting, packing, and warehousing processing, wherein, a cylinder stripping agent is added to the dryer section. The waste stainless steel lining pulp is loosened with a light knife and slowly beaten, so that the fibers are divided into filaments to reduce cutting; the soft knife pulp is beaten with a heavy knife and fast to improve the uniformity of the fibers. Among them (1) raw material ratio: waste stainless steel lining paper: softwood pulp by weight = 6:4; (2) beating process parameter requirements: softwood pulp: beating concentration 5%, beating beating degree 93°SR, wet weight 6.0g; waste stainless steel lining pulp: beating concentration 5.5%, beating beating degree 55°SR, wet weight above 3.8g; (3) Papermaking process: production variety: 17g/m 2 Copy paper, paper machine model: 2640mm Fourdrinier wire multi-cylinder thin paper machine, speed: 250m/min, Internet concentration: 0.35%; (4) Filler and chemical dosage: fluorescent whitening agent: 10.0kg/ton paper; purple , blue dye: 3kg/ton; accelerator: 0.5kg/ton paper; defoaming agent: 1.0kg/ton paper; peeling agent: 0.3kg/ton paper.

[0027] The specific production process of the present invention is shown in figure 1.

[0028] The invention adopts waste stainless steel lining paper to produce copy paper, which not only greatly reduces the production cost, but also reduces the power consumption for beating. It also makes full use of waste paper renewable resources, reduces deforestation and protects the environment.