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Preparation method of special neutral packaging paperboard for preventing copper product from color change

A packaging cardboard and anti-discoloration technology, which is applied in the field of papermaking technology, can solve the problems of easy corrosion, blackening of copper materials, and formation of color spots, and achieve the effects of uniform humidity, high yield and strong binding force

Active Publication Date: 2015-09-02
XINSHAO GUANGXIN ELECTRICAL INSULATING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The neutral packaging cardboard produced by this production process is blackened to the coated copper material, forming stains and prone to corrosion

Method used

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  • Preparation method of special neutral packaging paperboard for preventing copper product from color change

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Effect test

Embodiment 1

[0036] This embodiment is a production process of neutral packaging cardboard for anti-discoloration of copper materials, which specifically includes the following steps:

[0037] (1) Two kinds of high-quality natural color kraft wood pulps with different characteristics, namely Qingshan pulp and Baoqing pulp, are mixed in a hydropulper in a weight ratio of 7.5:3.5 and pulped, and then put into the rinsing tank after being dehydrated by an inclined sieve; Then use the clean water treated by reverse osmosis (the conductivity of the treated water is 28uS / mm, and the pH value is 8.0) to wash according to certain process requirements to improve the cleanliness of the slurry and reduce the residual drug content in the slurry filtrate. Reduce the residual drug content by about 30% at a time until it falls below 120mg / L, control the slurry concentration to 3.6%, and the pH value to 6.5;

[0038] (2) Slurry is transported to four double-disc refiners connected in series with a pump to...

Embodiment 2

[0043] This embodiment is a production process of neutral packaging cardboard for anti-discoloration of copper materials, which specifically includes the following steps:

[0044](1) Mix two kinds of high-quality natural color kraft wood pulp with different characteristics, that is, Qingshan pulp and Baoqing pulp, in a ratio of 7.5:2.5, and pulp them in a hydropulper, dehydrate them with an inclined screen, put them into the rinsing tank, and then use the reverse The clean water after osmosis treatment (the conductivity of the treated water is 28uS / mm, and the pH value is 5.0) is washed according to certain process requirements to improve the cleanliness of the slurry, reduce the residual drug content in the slurry filtrate, and reduce the residual after each cleaning The drug content is about 30%, until it drops below 110mg / L, the slurry concentration is controlled to 3.8%, and the pH value reaches 7.1;

[0045] (2) then use a pump to transport the paper pulp to four double-d...

Embodiment 3

[0050] This embodiment is a production process of neutral packaging cardboard for anti-discoloration of copper materials, which specifically includes the following steps:

[0051] (1) Two kinds of high-quality natural kraft wood pulp with different characteristics, namely Qingshan pulp and Baoqing pulp, are mixed in a ratio of 7:3 and pulped in a hydropulper, dehydrated by an inclined screen and put into a rinsing tank. Then use the clear water treated by reverse osmosis (the conductivity of the treated water is 30uS / mm, and the pH value is 7.0) to wash according to certain process requirements to improve the cleanliness of the slurry and reduce the residual drug content in the slurry filtrate. Reduce the residual drug content by about 30% at a time until it falls below 120mg / L, control the slurry concentration to 4.0%, and the pH value to 8.0;

[0052] (2) Then use a pump to transport the pulp to four series-connected double-disc refiners for primary refining. The semi-finish...

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Abstract

The invention relates to the technical field of a papermaking process and particularly relates to a preparation method of a special neutral packaging paperboard for preventing a copper product from color change. The preparation method comprises the following steps: crushing sulfate wood pulp, and washing with treated water until the content of residual drugs in the sulfate wood pulp is reduced to be lower than 120mg / L; controlling the concentration of the pulp to be 3.6-4.0% and the pH to be 5.0-8.0; carrying out primary grinding and secondary grinding on the pulp respectively; then diluting with water to obtain a pulp-water mixture; carrying out impurity removal, water filtering and molding on the pulp-water mixture to obtain a wet paper blank; and then, calendering to obtain a product. By virtue of the preparation method provided by the invention, the prepared special neutral packaging paperboard for preventing the copper product from the color change has high cleanliness and strong anti-oxidization; and the color and luster of the packaged copper material have no abnormal response, so that the special neutral packaging paperboard is particularly suitable for packaging the copper product with a relatively long storage period.

Description

technical field [0001] The invention relates to the technical field of papermaking technology, in particular to a preparation method of a special neutral packaging cardboard for anti-discoloration of copper materials. Background technique [0002] Copper anti-discoloration special neutral packaging cardboard is mainly used for military equipment products, for the packaging of important products such as bullets and shell casings. There is no abnormal reaction to the color and luster of the quality material. At present, the production process of neutral packaging cardboard is made of wood pulp raw materials through untreated circulating water shredding, primary refining, copying molding, water pressing, drying cylinder drying, calendering and other processes. The neutral packaging cardboard produced by this production process will blacken the coated copper material, form stains, and be prone to corrosion. Contents of the invention [0003] The object of the present inventi...

Claims

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Application Information

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IPC IPC(8): D21H11/04D21H27/10
Inventor 魏冬云龚刘慢林郑小玲
Owner XINSHAO GUANGXIN ELECTRICAL INSULATING MATERIALS
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