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Recycling method of diapers

A technology for diapers and fibers, applied in paper recycling, recycling technology, papermaking, etc., can solve the problem of difficult removal of superabsorbent resin, and achieve the effects of improving social and economic benefits, reducing emissions, and saving transportation.

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

[0006] The purpose of the present invention is to provide a method for recycling diapers, which solves the problem of difficult removal of superabsorbent resin in diaper materials in the prior art

Method used

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  • Recycling method of diapers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The paper diapers are crushed and dissolved in water, and the aluminum chloride solution is added respectively, fully stirred, and then disintegrated to obtain the paper diaper fibers.

[0036] The amount of aluminum chloride added in the aluminum chloride solution is 8% of the mass of the diaper, and the number of deflation rotations is up to 10,000 when the fiber is defatted, and the pulp concentration of 0.3g / L is ready for papermaking.

Embodiment 2

[0038] The paper diapers are crushed and dissolved in water, and the aluminum sulfate solution is added respectively, fully stirred, and then disintegrated to obtain the paper diaper fibers.

[0039] The amount of aluminum sulfate added to the aluminum sulfate solution is 10% of the mass of the diaper, and the number of deflation rotations is up to 10,000 when the fiber is defatted, and the concentration of the slurry on the Internet is 0.3g / L for papermaking.

Embodiment 3

[0041] The paper diapers are crushed and dissolved in water, and then the polyaluminum chloride solution is added respectively, fully stirred, and then disintegrated to obtain paper diaper fibers.

[0042] The amount of polyaluminum chloride added in the polyaluminum chloride solution is 12% of the mass of the diaper, and the number of deflation rotations reaches 10,000 rotations when the fibers are defatted, and the pulp concentration of 0.3g / L is ready for papermaking.

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PUM

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Abstract

The invention discloses a recycling method of diapers. The diapers are crushed and dissolved in water; then inorganic aluminum salt, inorganic or inorganic magnesium salt solution are added and stirred evenly; untwining is carried out to obtain diaper fibers; and papermaking is conducted at a netting concentration of 0.3g / L. The recycling method of diapers uses inorganic salt to treat diaper fibers, so as to change the interface double electric layer, internal density and external density of the SAP by using inorganic salt, and ultimately reach the demulsification effect. The present invention achieves effective recovery of leftover bits and pieces of diapers, and saves a substantial amount of resource. The method fully considers economic factors from the beginning of the development, continues grow the reuse profits, reaches significant effects from the respects of saving materials, energy and transportation reducing emissions and improving 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 relates to a method for recycling paper diapers. Background technique [0002] Diapers contain a large amount of superabsorbent resin, which seriously affects the performance of recycled paper, and the annual waste is large, and the fiber degradation time is long. If it is not disposed of in time, it will cause serious environmental pollution and waste of resources. [0003] The wood fibers used in diapers are high-quality virgin wood pulp with long fiber length and bleached, which is a high-quality raw material for making high-strength performance paper. Recycling this kind of fiber can not only reduce the cost of papermaking raw materials, but also reduce the consumption of bleaching chemicals, so the research on the recycling technology of paper diaper fiber is imperative. [0004] In the field of diapers, domestic and foreign researchers have paid more attention to the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/02
CPCD21C5/022Y02W30/64
Inventor 张素风孟卿君刘丽娜雷丹
Owner SHAANXI UNIV OF SCI & TECH
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