Paper protection agent as well as preparation method and application process thereof

A protective agent and paper technology, applied in the direction of paper, papermaking, paper coating, etc., can solve the problems of accelerated paper aging, paper secondary damage, etc., and achieve the effects of delaying acidification hydrolysis, protecting penetration, and reducing water components

Inactive Publication Date: 2018-10-19
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a paper protective agent and its preparation method and application process, which solves the technical problem that the existing paper protective agent easily causes secondary damage to paper and accelerates the aging of paper

Method used

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  • Paper protection agent as well as preparation method and application process thereof
  • Paper protection agent as well as preparation method and application process thereof
  • Paper protection agent as well as preparation method and application process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Pretreatment: Take several sheets of old newsprint from the 1982 "Malaysia Daily" in the same week, but the general aging state is the same, and place it at 25°C and 50% humidity for 24 hours at constant temperature and humidity, and then take out the paper to be processed.

[0054]Accurately measure 49.75g of absolute ethanol and 49.75g of deionized water into a beaker, then add 0.5g of carboxymethylcellulose calcium, put it in a sealed container, heat up to 75°C to dissolve, stir and mix well, and prepare the protective agent . Put the protective agent in a sealed container and directly apply the paper to be treated with a four-sided applicator, brush back and forth at 25°C for 10-15mins; dry the treated paper naturally at 25°C and 50% humidity. Measure the properties and indicators of the paper before and after the treatment with the protective agent.

[0055] As shown in Table 1, the strengthening agent with a mass fraction of 0.5% carboxymethyl cellulose calcium h...

Embodiment 2

[0059] The pretreatment method is the same as in Example 1.

[0060] Accurately measure 49.625g of absolute ethanol and 49.625g of deionized water into a beaker, then add 0.75g of carboxymethylcellulose calcium, stir and mix thoroughly, place in a sealed container, heat up to 75°C to dissolve , fully stirred and mixed evenly to prepare the protective agent. Put the protective agent in a sealed container and directly apply the paper to be treated with a four-sided applicator, and brush back and forth at 25°C for 10-15mins; place the treated paper at 25°C and 50% humidity to dry naturally. Measure the properties and indicators of the paper before and after the treatment with the protective agent.

[0061] As shown in Table 2, the reinforcing agent with a mass fraction of 0.75% of carboxymethyl cellulose calcium can improve the mechanical strength of the paper to a certain extent, which is larger than that in Example 1, and the pH value of the paper surface is improved. Before ...

Embodiment 3

[0065] The pretreatment method is the same as in Example 1.

[0066] Accurately measure 49.5g of absolute ethanol and 49.5g of deionized water into a beaker, add 1.00g of carboxymethylcellulose calcium, place in a sealed container, heat up to 75°C to dissolve, stir and mix well to obtain a protective agent. Put the protective agent in a sealed container and directly apply the paper to be treated with a four-sided applicator, and brush back and forth at 25°C for 10-15mins; put the treated paper at 25°C and 50% humidity to dry naturally, measure The properties and indicators of paper before and after treatment with protective agent.

[0067] As shown in Table 3, the reinforcing agent with a mass fraction of carboxymethyl cellulose calcium of 1.0% significantly improves the mechanical strength and tearing degree of the paper, which is larger than that in Example 2, and improves the pH value of the paper surface , and the paper will not have a large color difference before and af...

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Abstract

The invention relates to the technical field of paper protection and in particular relates to a paper protection agent as well as a preparation method and an application process thereof. The inventiondiscloses the paper protection agent which comprises calcium carboxymethylcellulose and at least two solvents. By adopting the paper protection agent, the mechanical strength of paper can be improved, paper acidification hydrolysis of the paper can be retarded, and meanwhile, the paper protection agent does not seriously affect the chromaticity of the paper, is beneficial to preservation of paper, and has good protection and repairing effects on aged paper. The invention further provides a preparation method of the paper protection agent. The preparation method is simple to operate and simpleand easy in raw material obtaining. The invention further provides an application process of the paper protection agent. The application process is simple in step and applicable to industrial production. The technical problems that conventional paper is liable to be seriously acidified in long-term preservation, the mechanical strength is degraded, and the paper is seriously discolored, can be solved.

Description

technical field [0001] The invention relates to the technical field of paper protection, in particular to a paper protection agent and its preparation method and application process. Background technique [0002] As one of the four ancient civilizations, China has a very rich cultural tradition and a very long history of paper use. Papermaking, one of the four great inventions, has experienced thousands of years of historical accumulation and is now widely used. We use paper to draw, write, record important information, use paper to compile teaching materials, and record historical facts. So in China, many paper archives, books, calligraphy and cultural relics have been preserved. These paper materials are the voices of the excellent history of the Chinese nation, the witnesses of the hard struggle of the Chinese nation, and the companions of the historical storms that our country has gone through. As time progresses steadily, these paper cultural relics have reached the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/34D21H19/14D21H21/18D21H23/22D21H25/06D21H25/18
CPCD21H19/14D21H19/34D21H21/18D21H23/22D21H25/06D21H25/18
Inventor 潘晨倩匡碧峰谭伟方岩雄蒋峰郑育英蔡晓兰
Owner GUANGDONG UNIV OF TECH
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