Method for preparing high-transparency copying paper by applying waste-paper deinked pulp

A technology for deinking pulp and high transparency of waste paper, applied in the field of papermaking, can solve the problems of poor transparency, poor mechanical properties, and poor deinking effect of copy paper, and achieve the effects of good mechanical properties, improved leveling and cost reduction.

Inactive Publication Date: 2018-01-30
福建省晋江优兰发纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, in view of the above content, the present invention provides a method for preparing high-transparency copy paper using waste paper deinking pulp, which solves the problem of poor transparency, poor deinking effect, and poor mechanical properties of copy paper prepared from waste paper pulp in the prior art. poor defect

Method used

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  • Method for preparing high-transparency copying paper by applying waste-paper deinked pulp

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Embodiment 1

[0017] A method for preparing high-transparency copy paper by using waste paper deinking pulp, comprising the following processing steps:

[0018] (1) Collect waste paper pulp, add modified deinking agent to deink it, the deinking agent of described modification is made up of each raw material of following parts by weight: 20 parts of sodium dodecylsulfonate, polyoxyethylene alkanes 10 parts of base ether, 20 parts of propylene glycol, 40 parts of sodium hydroxide, 10 parts of dimethyl diallyl ammonium chloride, 5 parts of methacrylamide, 3 parts of EDTA, 10 parts of pentaerythritol tetraacrylate; Controlled at 75°C, deinking treatment for 30 minutes, the amount of deinking agent is 3% of the waste paper pulp weight, to obtain deinked pulp;

[0019] (2) add sodium borohydride, diethyltriaminepentaacetic acid to the deinked pulp obtained through step (1), and wash; the consumption of sodium borohydride and diethyltriaminepentaacetic acid is the deinked pulp weight 10wt%, 4wt%;...

Embodiment 2

[0024] A method for preparing high-transparency copy paper by using waste paper deinking pulp, comprising the following processing steps:

[0025] (1) Collect waste paper pulp, add modified deinking agent to deink it, the deinking agent of described modification is made up of each raw material of following parts by weight: 30 parts of sodium dodecylsulfonate, polyoxyethylene alkanes 13 parts of base ether, 25 parts of propylene glycol, 45 parts of sodium hydroxide, 12 parts of dimethyl diallyl ammonium chloride, 8 parts of methacrylamide, 4 parts of EDTA, 15 parts of pentaerythritol tetraacrylate; Controlled at 80°C, deinking treatment for 45 minutes, the amount of deinking agent is 5% of the weight of waste paper pulp, to obtain deinked pulp;

[0026] (2) add sodium borohydride, diethyltriaminepentaacetic acid to the deinked pulp obtained through step (1), and wash; the consumption of sodium borohydride and diethyltriaminepentaacetic acid is the deinked pulp weight 13wt%, 6w...

Embodiment 3

[0031] A method for preparing high-transparency copy paper by using waste paper deinking pulp, comprising the following processing steps:

[0032] (1) Collect waste paper pulp, add modified deinking agent to deink it, the deinking agent of described modification is made up of each raw material of following parts by weight: 40 parts of sodium dodecylsulfonate, polyoxyethylene alkanes 16 parts of base ether, 30 parts of propylene glycol, 50 parts of sodium hydroxide, 15 parts of dimethyl diallyl ammonium chloride, 10 parts of methacrylamide, 5 parts of EDTA, 20 parts of pentaerythritol tetraacrylate; Controlled at 85°C, deinking treatment for 60 minutes, the amount of deinking agent is 8% of the waste paper pulp weight, to obtain deinked pulp;

[0033] (2) add sodium borohydride, diethyltriaminepentaacetic acid to the deinked pulp obtained through step (1), and wash; the consumption of sodium borohydride and diethyltriaminepentaacetic acid is the deinked pulp weight 15wt%, 8wt%...

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Abstract

The invention relates to the field of paper making and provides a method for preparing high-transparency copying paper by applying waste-paper deinked pulp. By adoption of the high-transparency copying paper, the defects of bad transparency, poor deinking effect and poor mechanical property in the copying paper prepared by the waste paper pulp in the prior art are solved. The high-transparency copying paper comprises the following steps of: (1) collecting the waste paper pulp and adding a modified deinking agent to carry out deinking on the waste paper pulp; (2) adding sodium borohydride and diethylene triamine penlaacetic acid into deinking pulp obtained by treatment of the step (1), and washing; (3) carrying out beating and pulping treatment on the deinking pulp subjected to washing, wherein the beating degree is 30-35 degree SR; (4) carrying out beating and pulping treatment on chemical pulp of needlebush, wherein the beating degree is 70-80 degree SR; (5) mixing the pulp in the step (3) and the pulp in the step (4), and carrying out papermaking, wherein a dispersing agent is added in the papermaking process.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a method for preparing high-transparency copy paper by using waste paper deinking pulp. Background technique [0002] Copy paper is a kind of high-grade cultural industrial paper which is very difficult to produce. Its characteristics mainly include high physical strength, excellent uniformity and transparency, and good surface properties, fine, smooth, smooth, no bubbles, sand, Good printability. It has a wide range of uses and can be used in the printing industry, clothing packaging, etc., and has an irreplaceable position. Usually the weight of good copy paper is 17~20g / m 2 Between, thin and extremely tough. [0003] Usually copy paper is made of coniferous wood pulp and hardwood pulp as the original pulp, the cost is relatively expensive, and waste paper deinked pulp is used as raw material, due to the defects of the preparation process, the prepared copy paper has poor transpar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/02
CPCY02W30/64
Inventor 曹旭郑明耀甘木林
Owner 福建省晋江优兰发纸业有限公司
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