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Paper deacidification method adopting two-component water-based deacidification agent

A deacidification method and deacidification technology, which are applied in paper recycling, post-processing of waste paper, recycling technology, etc., can solve the problems of paper wrinkle, handwriting smearing, poor deacidification effect of paper, etc., and are not easy to return acid. , to avoid the effect of paper wrinkles

Active Publication Date: 2022-07-05
HANGZHOU ZHONGCAI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of this application is to provide a method for deacidifying paper using a two-component water-based deacidifying agent, so as to solve the problem that both water-soluble deacidifying agents and suspension deacidifying agents alone in the related art will lead to poor paper deacidifying effect. The step-by-step use of water-soluble deacidifiers and suspended deacidifiers will lead to excessive accumulation of water in the paper, and there will be problems of handwriting staining and paper wrinkling. Finally, on the basis of thorough and uniform deacidification, the post-deacidification process can be improved. Required alkali residues to reasonable levels

Method used

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  • Paper deacidification method adopting two-component water-based deacidification agent
  • Paper deacidification method adopting two-component water-based deacidification agent
  • Paper deacidification method adopting two-component water-based deacidification agent

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Select the first part of "Easy Literacy Textbook", handmade paper, weight 45g / m 2 , the original pH=5.03 of the paper, the aqueous solution deacidifying agent is an aqueous sodium bicarbonate solution, and the suspending deacidifying agent is a nano-calcium carbonate aqueous suspension, and after the paper is subjected to fog moistening and deacidification according to the paper deacidification method in the above-mentioned embodiment, the deacidification is completed. The average pH was 8.7, the paper was wrinkled, and the handwriting was not smeared.

Embodiment 2

[0058] Select "Science and Outlook on Life", machine-made paper, weight 77g / m 2 , the original pH=4.08, the aqueous solution deacidification agent is a mixed aqueous solution of lithium tetraborate and trona, the suspension deacidification agent is a nano-magnesium hydroxide aqueous suspension, and the paper is misted according to the paper deacidification method in the above-mentioned embodiment 1. The average pH was 8.9 after the deacidification was completed, and the paper had no wrinkles and no smearing of handwriting.

Embodiment 4

[0064] Select "Spring and Autumn Zuo's Biography School Book", handmade paper, weight 50g / m 2 , the original pH=5.6, the aqueous solution deacidifying agent is a sodium carbonate aqueous solution, and the suspending deacidifying agent is a nano-magnesium carbonate aqueous suspension, and the average pH after the paper is sprayed and deacidified is carried out according to the paper deacidification method in the above-mentioned embodiment 1. It is 8.4, the paper has no wrinkles, and the handwriting has no smearing.

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Abstract

The invention discloses a paper deacidification method adopting a two-component water-based deacidification agent. The paper deacidification method adopting the two-component water-based deacidification agent comprises the following steps: respectively conveying an aqueous solution deacidification agent and a suspension deacidification agent (a dispersion medium can be water or an organic solvent) to a mixer through a metering pump; rapidly mixing the aqueous solution deacidification agent and the suspension deacidification agent by a mixer to form a double-component mixed solution; outputting the double-component mixed solution to an atomizer; and atomizing the double-component mixed solution into deacidification agent fog drops by an atomizer, and uniformly dispersing the deacidification agent fog drops onto the surface of paper to be deacidified, so that the paper to be deacidified is completely infiltrated. According to the method, the problems that the paper deacidification effect is poor due to the fact that a water-soluble deacidification agent and a suspension deacidification agent are independently adopted in the prior art, and the risks of handwriting bleeding and dyeing and paper wrinkling are caused due to the fact that the water-soluble deacidification agent and the suspension deacidification agent are adopted step by step are solved.

Description

technical field [0001] The present application relates to the technical field of paper deacidification, in particular, to a paper deacidification method using a two-component water-based deacidification agent. Background technique [0002] As an ancient civilization with a long history, my country has countless cultural properties. Among them, paper is the carrier of humanities and ideas, and has a very high protection value. However, due to the imperfection of ancient paper protection technology and the influence of the environment, a large number of paper documents have turned yellow and brittle. [0003] The current treatment method for paper acidification is to use a deacidifying agent to deacidify the paper, neutralize the existing acid of the paper, and add a certain amount as an alkali residue to neutralize the acid generated due to natural aging or air pollution in the future. According to the international standard PD ISO-TS 18344-2016 Effectiveness of paper deaci...

Claims

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Application Information

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IPC IPC(8): D21H25/18
CPCD21H25/18Y02W30/64
Inventor 陈炳铨徐绍艳施文正徐春辉唐晓敏
Owner HANGZHOU ZHONGCAI TECH CO LTD
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