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Production process of high-whiteness vulcanized fiber paper

A production process and high whiteness technology, applied in the field of paper production, can solve the problems of reducing the bonding strength of steel paper, organic pollution, etc., achieve the effect of improving whiteness and product quality, and optimizing the process

Inactive Publication Date: 2020-09-29
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Application Information

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Problems solved by technology

Chinese Patent Application Publication No. CN201710563027.5 discloses an environmentally friendly steel paper and its production process. In this process, after the steel paper is desalted and cleaned, there will be a lower concentration of ZnCl in the desalination tank. 2 solution, so in the steel paper production process, ZnCl 2 If the solution is recycled for many times or the soaking time is too long, it can cause ZnCl 2 A large number of short-chain fibers accumulate in the solution, which inevitably causes organic pollution and reduces the bond strength of steel paper

Method used

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  • Production process of high-whiteness vulcanized fiber paper
  • Production process of high-whiteness vulcanized fiber paper

Examples

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Embodiment 1

[0013] Example 1: A production process for high-whiteness steel paper. In this process, the base paper of multi-layer steel paper is soaked in a zinc chloride solution in a soaking tank and then gelatinized, aged, desalted, dried and hot-pressed to obtain Steel paper finished product; After the desalination step, the mass concentration taken out from the desalination tank is 120 liters of 28% zinc chloride solution, such as figure 1 As shown, a test tube was used to select 100ml of zinc chloride solution for the test, and ozone was introduced into the zinc chloride solution at a rate of 0.4L / min for 5min, and then allowed to stand for 55min, and then concentrated at 110°C at high temperature to dissolve the chlorine Concentrate the mass concentration of the zinc chloride solution to more than 65%, then add hydrogen peroxide to the concentrated zinc chloride solution at 72°C until the mass concentration of hydrogen peroxide in the concentrated zinc chloride solution reaches 2.5%...

Embodiment 2

[0014] Example 2: A production process for high-whiteness steel paper, in which the multi-layer steel paper base paper is soaked in a zinc chloride solution in a soaking tank and then gelatinized, aged, desalted, dried and hot-pressed to obtain Finished steel paper; after the desalination step, 80 liters of zinc chloride solution with a mass concentration of 33% taken out from the desalination tank is injected into the zinc chloride solution at a rate of 0.6L / min per liter of zinc chloride solution in parts by mass. Pass through ozone for 6 minutes, then let stand for 65 minutes, then concentrate at 130°C at high temperature to concentrate the zinc chloride solution to a mass concentration above 65%, then add hydrogen peroxide to the concentrated zinc chloride solution at 68°C Until the mass concentration of hydrogen peroxide in the zinc chloride solution reaches 3.5% after concentrating, then leave standstill for 70min, so that the zinc chloride solution color changes from bla...

Embodiment 3

[0015] Example 3: A production process for high-whiteness steel paper. In this process, the base paper of multi-layer steel paper is soaked in a zinc chloride solution in a soaking tank, and then gelatinized, aged, desalted, dried and hot-pressed to obtain Finished steel paper; after the desalination step, 100 liters of zinc chloride solution with a mass concentration of 33% taken out from the desalination tank is injected into the zinc chloride solution at a rate of 0.5 L / min per liter of zinc chloride solution in parts by mass. Pass through ozone for 5 minutes, then let it stand for 60 minutes, and then concentrate at 120°C at high temperature to concentrate the zinc chloride solution to a mass concentration above 65%, then add peroxide to the concentrated zinc chloride solution at 70°C Hydrogen until the mass concentration of hydrogen peroxide in the zinc chloride solution reaches 3% after concentration, and then stand still for 60 minutes, so that the color of the zinc chlo...

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Abstract

The invention discloses a production process of high-whiteness vulcanized fiber paper. The process comprises the following steps: soaking multi-layer raw vulcanized fiber paper in a zinc chloride solution in a soaking pool, and then carrying out gelatinization, aging, desalination, drying and hot pressing to obtain a finished vulcanized fiber paper product; taking out the zinc chloride solution having undergone desalination; introducing ozone into every 0.5 to 2 parts by mass of the zinc chloride solution at a speed of 3 to 8 parts / min for 3 to 8 minutes, and carrying out standing for 50-70 min; concentrating the zinc chloride solution after standing until the mass concentration of the zinc chloride solution is 65% or above; and adding hydrogen peroxide to change the color of the zinc chloride solution from black to faint yellow in order to realize recovery treatment of the zinc chloride solution. According to the invention, colored groups in the zinc chloride solution having undergonedesalination can be purified, the zinc chloride solution is enabled to be clear and transparent, and the clear and transparent zinc chloride solution is used for vulcanized fiber paper production, sothe whiteness and the finished product quality of the vulcanized fiber paper are greatly improved.

Description

technical field [0001] The invention relates to the technical field of papermaking production, in particular to a production process of high-whiteness steel paper. Background technique [0002] With the application of steel paper in various fields, the demand for steel paper is increasing, and the requirements for the whiteness of steel paper are becoming more and more stringent. Chinese Patent Application Publication No. CN201710563027.5 discloses an environmentally friendly steel paper and its production process. In this process, after the steel paper is desalted and cleaned, there will be a lower concentration of ZnCl in the desalination tank. 2 solution, so in the steel paper production process, ZnCl 2 If the solution is recycled for many times or the soaking time is too long, it can cause ZnCl 2 A large number of short-chain fibers accumulate in the solution, which inevitably causes organic pollution and reduces the bonding strength of the steel paper. Due to ZnCl 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H25/06
CPCD21H25/06D21H27/00
Inventor 金光范许银超周晓莹
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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