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Method for repairing damaged and aged paper file paper

A technology of paper archives and paper, applied in paper, papermaking, paper coating, etc., can solve the problems of inability to popularize and use, high cost, difficult operation, etc., achieve effective cleaning and repairing effects, facilitate repairs, and simple methods

Active Publication Date: 2021-06-15
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing restoration methods for paper archives mainly focus on deacidification and protection. Deacidification is divided into gas-phase deacidification and liquid-phase deacidification. Gas-phase deacidification has high requirements on process conditions, large investment costs, and difficult operation. The deacidification method is relatively easy to operate, but the simple liquid phase deacidification has certain limitations in inhibiting the damage and aging of paper archives
Existing protection methods mainly include hot press filming method, vacuum lamination method, and polymer glue coating method. The conditions and requirements of these paper protection methods are relatively complicated, and the cost is high and other constraints, so they cannot be popularized and used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Experimental steps

[0021] (1) Take a piece of 200×280 machine-made paper made in 1990, and test the tensile strength, folding resistance, pH value and paper whiteness of the paper.

[0022] (2) Spread the damaged and aging paper in step (1) in a container filled with paper cleaning solution. The amount of cleaning solution added is to soak the paper, add deionized water to immerse the paper, soak for 2 days, and use an air pump to stir at a constant speed 20mim, without touching the paper. The paper cleaning solution is composed of the following components in percentage: 0.2% protease, 0.1% lipase, 0.1% amylase, 8% cellobiolipid, 6% phosphoethanolamine, and the balance is deionized water.

[0023] (3) After the treatment in step (2), the cleaning liquid is discharged, rinsed with deionized water for 2-3 times, and a paper restoration agent is prepared. The paper restoration agent is an aqueous solution of nanocellulose with a concentration of 1 mg / mL. Lay the cle...

Embodiment 2

[0029] 1. Experimental steps

[0030] (1) Take three A4 new machine-made papers and mark them as A, B, and C. Paper A is left untreated as a control sample.

[0031] (2) According to the method of ISO 5630-3:1996, paper B was subjected to artificial humidity simulation for paper aging, and the paper was placed in an oven at 80° C. and a relative humidity of 65% for 72 hours.

[0032] (3) Carry out the ultraviolet aging simulation experiment on the C paper, put the C paper in the ultra-clean workbench, and turn on the ultraviolet lamp to irradiate for 72 hours.

[0033] (4) Take B and C that have been artificially aged and spread them in a container filled with paper cleaning solution. The amount of cleaning solution added is to soak the paper, add deionized water to immerse the paper, soak for 2 days, and use an air pump to stir at a constant speed for 20mim , without touching the paper. The paper cleaning solution is composed of the following components in percentage: 0.2% ...

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PUM

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Abstract

The invention discloses a method for repairing damaged and aged file paper. The method comprises the following steps: cleaning the surface of the damaged and aged paper by using a cleaning agent, drying and shaping, repairing cracks and fractures of the paper by using a repairing material, and covering a film-forming protective layer on the surface after repairing, so as to finish repairing and reinforcing the damaged and aged file paper. The file paper is not additionally damaged during operation, the pH value of the surface of the paper is not obviously changed, the damaged and aged file paper is favorably repaired and reinforced, the method is simple and high in generalization performance, the repairing technology not only realizes the repairing of the paper file, but also realizes the rescue repairing of some long-time and precious paper files, and the method is an effective means for enriching Chinese culture and retaining social memory.

Description

technical field [0001] The invention relates to a method for repairing damaged and aged paper archival paper, which belongs to the field of paper repair technology. Background technique [0002] In our real life, archives of all levels and types keep a large number of paper archives. Although the archives warehouses must maintain constant temperature and humidity according to the national professional requirements, the conditions of individual units in some areas are difficult or the archives are adversely affected by the external environment. (such as house leakage, flood immersion), the main chemical composition of the paper archives will undergo some irreversible changes, making the paper brittle, aging or damaged, destroying the integrity of the paper archives, and having a serious impact on the content of the archives . The damage and aging of paper is caused by the interweaving of internal factors and external factors. The internal factors mainly come from the chemica...

Claims

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Application Information

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IPC IPC(8): D21H25/18D21H17/00D21H19/82D21H19/12
CPCD21H25/18D21H17/005D21H17/72D21H19/82D21H19/12
Inventor 杨洪云
Owner QINGDAO UNIV
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