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Method for producing kraft paper by waste newspaper

A production method and waste newspaper technology, which is applied in the processing of waste paper, paper, papermaking, etc., can solve the problems of too many ink spots and the color difference of waste newspapers, etc., and achieve the effect of using waste newspaper resources and reducing costs

Active Publication Date: 2017-01-04
HUBEI BAOTA PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Kraft paper has high strength requirements, so it is very important to choose raw materials with appropriate price and quality; waste newspaper is the most common waste paper material, which is rich in resources and low in price, but ordinary waste newspapers have a lot of text printed on them, and the paper can be used directly. There are a lot of ink spots on the surface, and the color of waste newspaper is very different from that of kraft paper

Method used

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  • Method for producing kraft paper by waste newspaper
  • Method for producing kraft paper by waste newspaper
  • Method for producing kraft paper by waste newspaper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1: as figure 1 Shown, a kind of waste newspaper produces the production method of kraft paper, it comprises the following steps:

[0057] Step 1): Deinking and pulping the waste newspapers, and storing the prepared pulp in the pulp storage tank;

[0058] Step 2): After the pulp in the pulp storage tank enters the pulp mixing tank, add direct blue dye to the pulp mixing tank;

[0059] Step 3): after the direct blue dyed pulp comes out of the pulp mixing tank, add direct red dye before slag removal;

[0060] Step 4): After the direct red dyed pulp is removed, the direct yellow dye is added;

[0061] Step 5): After the pulp dyed with direct yellow dye passes through the paper machine manufacturing step, the finished product is rewinded and finally packed into the warehouse;

[0062] In step 2), add 0.1kg of direct blue per ton of pulp; in step 3), add 0.5kg of direct red per ton of pulp; in step 4), add 12kg of direct yellow per ton of pulp;

[0063] When ad...

Embodiment 2

[0082] The production steps of Example 2 are basically the same as those of Example 1, with the difference that: in step 2), 0.2 kg of direct blue is added per ton of pulp; in step 3), direct red is added per ton of pulp 0.8kg; in step 4), add 15kg of direct yellow per ton of pulp.

[0083] The kraft paper toning data that embodiment 2 produces is as follows:

[0084]

[0085] Among them, the chromaticity L* represents the brightness of the object; a* represents the red-green value, the positive value is red, and the negative value is green; b* represents the yellow-blue value, the positive value is yellow, and the negative value is blue.

Embodiment 3

[0086] Example 3: The production steps of Example 3 are basically the same as those of Example 1, the difference is that: in the step 2), 0.3kg of direct blue is added per ton of pulp; in the step 3), each ton Add 1kg of direct red to the pulp; in step 4), add 17kg of direct yellow per ton of pulp.

[0087] The kraft paper toning data that embodiment 3 produces is as follows:

[0088]

[0089] Among them, the chromaticity L* represents the brightness of the object; a* represents the red-green value, the positive value is red, and the negative value is green; b* represents the yellow-blue value, the positive value is yellow, and the negative value is blue.

[0090] In Examples 1, 2, and 3, three different dyes are used for color matching, and qualified kraft paper with consistent color is finally produced, which effectively utilizes waste newspaper resources and reduces costs.

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Abstract

The invention provides a method for producing kraft paper by waste newspaper. The method comprises the following steps: carrying out deinking and pulping on the waste newspaper; storing prepared pulp in a pulp storage pond; after feeding the pulp in the pulp storage pond into a pulp preparing pond, adding direct blue dyestuff in the pulp preparing pond; after discharging the pulp dyed by direct blue from the pulp preparing pond, adding direct red dyestuff before slag is removed; after slag is removed from the pulp dyed by direct red, adding direct yellow dyestuff; and after the pulp dyed by the direct yellow dyestuff is subjected to papermaking through a paper machine, rewinding finished products, and finally packing and warehousing. By the method, the kraft paper with the qualified color standard is produced by the waste newspaper, resources of the waste newspaper are utilized effectively, and costs are reduced.

Description

technical field [0001] The invention relates to the technical field of recycling waste paper, and specifically refers to a production method for producing kraft paper from waste newspapers. Background technique [0002] With the continuous enhancement of people's awareness of environmental protection, in order to protect the environment, reduce the felling of forest logs and protect forest resources, the recycling of waste paper has increasingly attracted people's attention. Waste paper accounts for about 1 / 3 of the solid waste treatment load in cities. Recycling waste paper can not only reduce pollution, but also reduce costs. Traditional chemical pulping not only consumes forest resources, but also pollutes more, waste water is difficult to treat, and requires a lot of investment. Waste paper papermaking not only has less pollution, but also has less difficulty in wastewater treatment and less investment. The market demand for kraft paper is very large, and it can effecti...

Claims

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Application Information

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IPC IPC(8): D21C5/02D21H27/00D21H27/30
CPCD21C5/02D21C5/025D21H27/00D21H27/30Y02W30/64
Inventor 周卫东辛功浩刘学斌
Owner HUBEI BAOTA PAPER
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