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Method and system for recovering pulp fibers from used absorbent articles

A technology for recycling pulp and absorbent, which is applied in the field of pulp fiber recycling of absorbent articles, which can solve the problems of heavy burden and so on.

Active Publication Date: 2020-06-09
UNI CHARM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to Non-Patent Document 1, in the prior art, shredding equipment is required in addition to the separation and recovery equipment, and only the paper diapers with excreta adhered to them are shredded during the shredding process, so the burden on sanitation is heavy. , but this device can eliminate these costs and problems in sanitation management

Method used

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  • Method and system for recovering pulp fibers from used absorbent articles
  • Method and system for recovering pulp fibers from used absorbent articles
  • Method and system for recovering pulp fibers from used absorbent articles

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0072] The first embodiment will be described.

[0073] First, structural examples of absorbent articles will be described. An absorbent article includes a top sheet, a back sheet, and an absorber arranged between the top sheet and the back sheet. As an example of the size of an absorbent article, it is about 15 cm - 100 cm in length, and 5 cm - 100 cm in width. It should be noted that the absorbent article may also include further other components that are usually included in absorbent articles, such as a diffusion sheet, a leak-proof wall, and the like.

[0074] As a structural member of a surface sheet, a liquid-permeable nonwoven fabric, a synthetic resin film which has a liquid-permeable hole, these composite sheets, etc. are mentioned, for example. As a structural member of a back sheet, a liquid-impermeable nonwoven fabric, a liquid-impermeable synthetic resin film, and these composite sheets are mentioned, for example. As a structural member of a diffusion sheet, a ...

no. 2 Embodiment approach

[0155] The second embodiment will be described. Hereinafter, differences from the first embodiment will be mainly described. However, also in this embodiment, the case where an acidic aqueous solution is used as the inactivating aqueous solution will be described as an example.

[0156] The system 1 used for the method of recovering pulp fibers from used absorbent articles will be described. Figure 6 It is a block diagram showing an example of the system 1 of this embodiment. The system 1 of the present embodiment includes a container (not shown), a crushing device 12, and a first separation device 13, and preferably includes a first dust removal device 14, a second dust removal device 15, a third dust removal device 16, a second separation device 17, The third separation device 18 , the oxidant treatment device 19 and the fourth separation device 20 . Hereinafter, it demonstrates in detail.

[0157] In this embodiment, the container (not shown), the crushing device 12 , ...

Embodiment

[0169] An example of the method for recovering pulp fibers from the above-mentioned used absorbent article will be described below.

[0170]In this example, the perforation step S11, the crushing step S12, and the first separation step S13 of the method of the above-mentioned first embodiment were carried out on the absorbent article, and the relationship between the crushing method and the amount of other materials (foreign substances) mixed was investigated. . Specifically, as the absorbent article, a disposable diaper for adults (unused) was used. In crushing process S12, the disposable diapers at the time of adjusting the crushing apparatus 12 so that the average value of the size of crushed objects may be 25 mm, 50 mm, and 100 mm were made into Examples 1-3. On the other hand, the disposable diaper which did not perform crushing process S12 was made into the comparative example.

[0171] exist Figure 9 shows the result of investigating the relationship between the cru...

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Abstract

Provided is a method that, when pulp fibers are recovered from used absorbent articles that have been put into collection bags, makes it possible to safely and sanitarily crush the used absorbent articles while suppressing costs. A method for recovering pulp fibers from used absorbent articles, the method comprising: a crushing step (S12) in which collection bags (A) in which used absorbent articles have been sealed are put into a container (65), the collection bags in the container are transferred to a crushing device (12) that communicates with the container, and, bag by bag, the crushing device crushes the used absorbent articles in the collections bags in a deactivating aqueous solution; and a separation step (S13) in which the pulp fibers, a highly water-absorbent polymer, and the deactivating aqueous solution are separated from the crushed product and deactivating aqueous solution obtained in the crushing step.

Description

technical field [0001] The present invention relates to a method and system for recovering pulp fibers from used absorbent articles. Background technique [0002] A method of recovering pulp fibers from absorbent articles such as used disposable diapers is known. In this method, when disposing of used absorbent articles, it is important to suppress costs by improving the recovery rate of pulp fibers, treatment efficiency, etc., and to improve sanitation management by reducing the scattering of dirt from disposable diapers. Therefore, the collection bag in which many used absorbent articles were enclosed may be processed as it is. By directly disposing of the collection bag, the work of taking out the used absorbent article from the collection bag can be reduced (improved disposal efficiency), and the dirt and fungi adhering to the used absorbent article can hardly come into contact with the worker (improve hygiene). manage). [0003] As such a method, for example, Non-Pat...

Claims

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Application Information

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IPC IPC(8): B09B5/00B02C18/00
CPCB09B5/00B03B9/061Y02W30/52Y02W30/64Y02W30/62B09B3/00B02C18/00B02C18/142B02C18/16B29B17/02A61F5/44A61F13/15B03B1/04B03B5/00B03B9/06Y02W30/20B02C4/08B02C23/36D21B1/021D21B1/026D21B1/345
Inventor 小西孝义平冈利夫加藤孝栗田范朋
Owner UNI CHARM CORP
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