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Method for reusing leftover bits and pieces of diaper

A technology for scraps and diapers, applied in the field of pulp and paper making, can solve problems such as difficulty in removing superabsorbent resin, and achieve the effects of improving social and economic benefits, saving energy and resources

Inactive Publication Date: 2016-04-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for recycling diaper scraps, which solves the problem of difficult removal of superabsorbent resin in diaper materials in the prior art

Method used

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  • Method for reusing leftover bits and pieces of diaper
  • Method for reusing leftover bits and pieces of diaper

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Step 1, dissolving the scraps of diapers in water after pulverizing them, then adding 8% aluminum chloride of the mass of the scraps of dry diapers, fully stirring, and then using a 991738-type standard pulp decomposer for 10,000 revolutions to obtain a fiber slurry;

[0037] Step 2, making paper from the fiber slurry treated in step 1. Use the ZQJ1-B paper pattern picker to make paper. First, add the decomposed slurry to the paper sample extractor, add water until the concentration of the slurry on the net is 0.3g / L, stir the fiber slurry evenly with a stirrer, drain the water to make it a wet paper web, and then use a pressure roller to manually Squeeze, and finally put it into a paper dryer, and dry it at a temperature of 105°C for 10 minutes under the condition of a vacuum of 0.06 MPa. After drying, put the vacuum and take out the paper.

Embodiment 2

[0039]Step 1, dissolving the scraps of diapers in water after pulverizing them, then adding aluminum sulfate of 10% of the mass of the scraps of dry diapers, stirring thoroughly, and then using a 991738-type standard pulp decomposer for 10,000 revolutions to obtain a fiber slurry;

[0040] Step 2, making paper from the fiber slurry treated in step 1. Use the ZQJ1-B paper pattern picker to make paper. First, add the decomposed slurry to the paper sample extractor, add water until the concentration of the slurry on the net is 0.3g / L, stir the fiber slurry evenly with a stirrer, drain the water to make it a wet paper web, and then use a pressure roller to manually Squeeze, and finally put it into a paper dryer, and dry it at a temperature of 105°C for 10 minutes under the condition of a vacuum of 0.06 MPa. After drying, put the vacuum and take out the paper.

Embodiment 3

[0042] Step 1, dissolving the scraps of diapers in water after pulverizing them, then adding 12% polyaluminium chloride of the weight of the scraps of dry diapers, fully stirring, and then using a 991738-type standard pulp decomposer for 10,000 revolutions to obtain a fiber slurry;

[0043] Step 2, making paper from the fiber slurry treated in step 1. Use the ZQJ1-B paper pattern picker to make paper. First, add the decomposed slurry to the paper sample extractor, add water until the concentration of the slurry on the net is 0.3g / L, stir the fiber slurry evenly with a stirrer, drain the water to make it a wet paper web, and then use a pressure roller to manually Squeeze, and finally put it into a paper dryer, and dry it at a temperature of 105°C for 10 minutes under the condition of a vacuum of 0.06 MPa. After drying, put the vacuum and take out the paper.

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Abstract

The present invention discloses a method for reusing leftover bits and pieces of diaper. The water-absorbing resin in the leftover bits and pieces of diaper is removed by using inorganic aluminum, and then the leftover bits and pieces of diaper are treated for papermaking. The method for reusing leftover bits and pieces of diaper uses inorganic aluminum salt to damage the interface double electric layer of the superabsorbent hydrogel material, improve the density difference of the two phases inside and outside, promote precipitation of the internal phase; and the increase of the polar phase difference of the internal and external phases decreases the solubility of the external phase (the oil phase) in water, so as to ultimately achieve the goal of removing SAP. The present invention achieves effective recovery of leftover bits and pieces of diapers, saves a substantial amount of resource, energy, transportation and emissions, improves the social and economic benefits, and makes great contribution to the pulping and papermaking industry.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a method for recycling paper diaper leftovers. Background technique [0002] In recent years, with the sustained and rapid growth of the domestic economy, the improvement of people's material living standards and the convenience of life, the use of diapers by babies and the elderly has increased year by year. According to statistics, in 2007, the total consumption of baby diapers in China reached more than 7.75 billion pieces, of which baby diapers exceeded 5.2 billion pieces; baby diapers exceeded 2.5 billion pieces. Calculated on the basis of an average strip quality of about 40 grams, the total consumption is about 310,000 tons. In the process of producing diapers, a lot of leftover materials and waste products with substandard performance will be produced. Direct disposal of these materials will cause a great waste of resources and also cause cert...

Claims

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Application Information

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IPC IPC(8): D21C5/02D21F13/00
CPCD21C5/022D21F13/00Y02W30/64
Inventor 张素风孟卿君雷丹刘丽娜
Owner SHAANXI UNIV OF SCI & TECH
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