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Method for manufacturing anti-interference recycled paper reinforcing agent

A manufacturing method and reinforcing agent technology, applied in the field of papermaking auxiliaries, can solve the problems of reinforcing agent interference, affecting the reinforcing effect, damage to fiber strength, etc., and achieve the effect of good impurity interference and good effect.

Active Publication Date: 2014-07-09
HANGZHOU PAPERMATE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the influence of light, bacteria, mildew, etc. during the use of waste paper, the fiber strength is damaged and decreased; a significant difference between recycled fiber and original fiber is that recycled fiber contains various chemical additives, adhesives, inks, etc. Although many miscellaneous chemical substances have been removed after de-inking, cleaning, etc., the remaining chemical additives, inks, adhesives and other chemical impurities will still interfere with ordinary reinforcing agents and seriously affect the reinforcing effect

Method used

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  • Method for manufacturing anti-interference recycled paper reinforcing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Step 1) Premix 20g (0.11 moles) of potassium hydroxide with a concentration of 30% and 29g (0.08 moles) of 4-chloro-2-butenyltrimethylammonium chloride with a concentration of 50% and activate it for 5 minutes, Together with 500g cornstarch (2.65 moles), it is continuously metered and mixed at a high speed by a coulter type high-speed mixing equipment. After 30 minutes of continuous pipeline reaction, the reaction product is cationic starch with a cationic substitution degree of 0.025;

[0025] Step 2) The previous reaction system is dried by airflow in the pipeline, and the moisture is controlled at 5-8%, then 3.5g (0.001 mole) of sodium tripolyphosphate is added, and after continuous metering and high-speed mixing, continue to continuously input the In the pipeline reactor, the pH value (measured at 3% concentration) was adjusted to 4.5 with phosphoric acid, and then the temperature of the pipeline was raised to 135°C for powder fluidized continuous reaction. After 40...

Embodiment 2

[0029] Step 1) Premix 6.7g (0.05 mole) of 30% sodium hydroxide with 14g (0.037 mole) of 50% 3-chloro-2-hydroxypropyltrimethylammonium chloride and activate it for 5 minutes , together with 200g tapioca starch (1.06 moles), is continuously metered and mixed at a high speed by a plow-type high-speed mixing equipment, the speed is 700 rpm, the pH value is controlled at about 11, the temperature is controlled at 40°C, and the water content of the reaction system is 15-18%. , after 30 minutes of continuous pipeline reaction, the reaction product is cationic starch with a cationic substitution degree of 0.030;

[0030] Step 2) The previous reaction system is dried by airflow in the pipeline, and the water content is controlled at 5-8%, and then 1.1g (0.003 mole) of sodium tripolyphosphate and 0.31g (0.003 mole) of acetic anhydride are added, and continuously metered and continuously high-speed After mixing, continue to continuously input into the pipeline reactor with an auger, and ...

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Abstract

The invention relates to a method for manufacturing an anti-interference recycled paper reinforcing agent and aims to solve the technical problems that interference of various kinds of impurities cannot be effectively resisted and the intensity of paper cannot be improved. The method comprises the following steps of: 1) cationization reaction: pre-mixing and activating a cationization reagent and a cation activating catalyst, and performing continuous pipeline reaction on a mixture and native starch; 2) anionization reaction: adding an anion complexing agent and an acid catalyst into the preceding reaction system, and continuously reacting in a pipeline type reactor to obtain an amphoteric starch primary product; and 3) composite reaction: adding an anti-interference agent into the preceding reaction system, and continuously reacting in the pipeline type reactor to obtain a final product.

Description

technical field [0001] The invention relates to the field of papermaking auxiliary agents, in particular to a method for manufacturing an anti-interference type recycled paper strengthening agent. Background technique [0002] Recycling one ton of waste paper can produce 0.8 tons of good paper, cutting 17 trees less, and using one ton of waste paper pulp can save 3-5 cubic meters of wood, 1.0-1.5 tons of coal, 3-100 cubic meters of water, and 300-800 kilograms Chemical raw materials, reducing air pollution by 75%, water pollution by 35%, and 3 cubic meters of landfill space. Because of the significance of waste paper utilization, some developed countries have begun to legislate on the recycling of waste paper. [0003] In recent years, the utilization rate of waste paper in my country has been greatly improved. In particular, green packaging that replaces wood and metal with paper has become a development trend and is increasingly favored by consumers. Due to the influenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/18C08B31/16
Inventor 姚献平郑丽萍龚关善应晓荣姚臻
Owner HANGZHOU PAPERMATE SCI & TECH
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