JP2004009007A - Method of treating urine absorber after use and urine absorber - Google Patents

Method of treating urine absorber after use and urine absorber Download PDF

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JP2004009007A
JP2004009007A JP2002169416A JP2002169416A JP2004009007A JP 2004009007 A JP2004009007 A JP 2004009007A JP 2002169416 A JP2002169416 A JP 2002169416A JP 2002169416 A JP2002169416 A JP 2002169416A JP 2004009007 A JP2004009007 A JP 2004009007A
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water
urine
urine absorbent
topsheet
solution
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JP4303918B2 (en
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Takeshi Cho
長　武志
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CARE-ROOT SERVICE CO Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly

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  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Processing Of Solid Wastes (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
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Abstract

<P>PROBLEM TO BE SOLVED: To easily and surely recover pulp components without shredding urine absorbers, such as used diapers and urine collecting pads in a short period of time. <P>SOLUTION: The urine absorber constituted by including a water absorption sheet consisting of flocculent pulp and polymeric water absorption polymer with a surface sheet consisting of a biodegradable water-soluble nonwoven fabric dissolved in a solution of the temperature exceeding the body temperature of the human body and a waterproof sheet is immersed into a solution into which a water separating agent is incorporated and which is held at the dissolving temperature of the surface sheet and the waterproof sheet, by which the surface sheet and the waterproof sheet are dissolved and the included flocculent pulp and polymeric water absorption polymer are separated from the surface sheet and the waterproof sheet. The moisture absorbed by the polymeric water absorption polymer is thus separated and the pulp components are recovered. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、使用済のおむつや尿取りパッド等の尿吸水体の使用後の処理方法に関し、詳しくは尿吸水体を破砕することなくパルプ成分を容易且つ確実に回収するとともに、パルプ回収後の残物・残液を環境に負荷を与えないで処理できるようにする技術に関する。
【０００２】
【従来の技術】
従来、使い捨ておむつや尿取りパッド等の尿吸水体は綿状パルプの上面にレーヨン，ポリプロピレン，ポリエステル等の不織布が使用され、下面にポリエチレンフィルム等が防水シートとして主に使用されている。ポリエチレンには通気性（透湿）と非通気性のものがあり、透明の透湿フィルムを前記不織布に張り合わせたものがベビー用，大人用のテープ式おむつ等に使用されている。
ところで、これらの尿吸水体の使用済品はその大半が一過性の物として焼却処理されており、近年では森林伐採が自然環境に悪影響を与えることや焼却処理時に発生する二酸化炭素の排出、ダイオキシン類の発生等が大きな問題となっている。
そこで、その解決手段としては発酵分解処理システム（コンポスト化）と水溶化処理システム（パルプの回収、再資源化）等があるが、これらの何れの方法でも現状の尿吸水体に使用されている不織布や防水シートは分離回収後固形燃料化、又は焼却処分されており、綿状パルプと同様に処理することはできなかった。すなわち、発酵分解処理システムによるコンポスト化は、尿吸水体を破砕して発酵分解処理機に投入し、数日間発酵分解させて堆肥として使用するが、尿吸水体に使用されている不織布及び防水シートは発酵分解処理の前後で分別回収され、固形燃料又は焼却処理されている。
一方、水溶化処理システムによる回収パルプの再資源化は、尿吸水体を破砕して離水剤を混入した撹拌槽で水溶化し、高分子吸収ポリマーの吸水した水分を離水させ、循環分離槽で不織布及び防水シートを除去してパルプ成分を回収し、同パルプ成分を洗浄・殺菌・乾燥処理して再生パルプを得、再び尿吸水体に用いているが、回収後の残りの不織布及び防水シートは前記と同様に固形燃料又は焼却処理されている。
このように、何れの方法においても分離回収した不織布及び防水シートは、固形燃料又は焼却処理するなどの手間を要することと環境への負荷の問題があった。
【０００３】
【発明が解決しようとする課題】
本発明が解決しようとする課題は、従来のこれらの問題点を解消し、使用済のおむつや尿取りパッド等の尿吸水体を破砕することなく容易且つ確実に短時間にパルプ成分を回収し、環境に負荷を与えないで処理できるようにする尿吸水体の使用後の処理方法及び尿吸水体を提供することにある。
【０００４】
【課題を解決するための手段】
かかる課題を解決した本発明の構成は、
１）　尿を吸水するパルプ質の吸水シートを表面シートで封止した尿吸水体の使用後の処理方法であって、前記表面シートの全部又は一部が人体の体温を超える温度の溶液中で溶解する水溶性素材で構成され、表面シートの溶解温度の溶液を貯水した撹拌槽内に使用済の尿吸水体を浸漬して撹拌し、表面シートの前記水溶性素材を溶解させて内部から吸水シートを放出させて、尿吸水体からパルプ成分を分離させ、尿吸水体を破砕することなくパルプ成分を回収できるようにしたことを特徴とする尿吸水体の使用後の処理方法
２）　吸水シートが綿状パルプと高分子吸水ポリマーとを組み合わせて構成されたもので、撹拌槽内に離水剤を混入して高分子吸水ポリマーの吸水した水分を離水させ、沈殿した高分子吸水ポリマーを撹拌槽外に排出するようにした前記１）記載の尿吸水体の使用後の処理方法
３）　パルプ成分を回収した残りの溶液中に表面シートの溶解液を分解する菌を混入し、同菌で表面シートの溶解液を生分解して廃水処理できるようにした前記１）又は２）記載の尿吸水体の使用後の処理方法
４）　尿を吸水する高分子吸水ポリマーを含むパルプ質の吸水シートを表面シートで封止した尿吸水体の使用後の処理方法であって、前記表面シートの全部又は一部が人体の体温を超える温度の溶液中で溶解する水溶性素材で構成され、表面シートの溶解温度の溶液を貯水した撹拌槽内に使用済の尿吸水体を浸漬して撹拌し、表面シートの前記水溶性素材を溶解させて内部から吸水シートを放出させ、同溶液中に表面シートの溶解液を分解する菌を混入して溶解液を生分解し、その後溶液と尿吸水体の分解物を浄化槽に投入して浄化処理し、尿吸水体の材料を堆肥に利用できるようにしたことを特徴とする尿吸水体の使用後の処理方法
５）　表面シートの水溶性素材の溶液温度が５０℃以上である前記１）〜４）いずれか記載の尿吸水体の使用後の処理方法
６）　表面シートの一部を防水加工した前記１）〜５）いずれか記載の尿吸水体の使用後の処理方法
７）　表面シートの水溶性素材が鹸過度９５以上のポリビニルアルコールである前記１）〜６）いずれか記載の尿吸水体の使用後の処理方法
８）　尿吸水体がおむつ又は尿取りパッドとして使用されるものである前記１）〜７）いずれか記載の尿吸水体の使用後の処理方法
９）　尿を吸水するパルプ質の吸水シートを全部又は一部が人体の体温を超える温度の溶液中で溶解する水溶性素材で構成された表面シートで封止した尿吸水体１０）　表面シートの水溶性素材の溶解温度が５０℃以上である前記９）記載の尿吸水体
１１）　吸水シートが綿状パルプと高分子吸水ポリマーとを組み合わせて構成されたものである前記９）又は１０）記載の尿吸水体
１２）　表面シートの一部を防水加工した前記９）〜１１）いずれか記載の尿吸水体
１３）　表面シートの水溶性素材が鹸過度９５以上のポリビニルアルコールである前記９）〜１２）いずれか記載の尿吸水体
１４）　尿吸水体がおむつ又は尿取りパッドとして使用されるものである前記９）〜１３）いずれか記載の尿吸水体
にある。
【０００５】
【作用】
本発明によれば、表面シート及び防水シートの溶解温度に保持した溶液中に使用済の尿吸水体を浸漬すると、表面シート及び防水シートが溶解して吸水シートが放出して分離し、従来のように尿吸水体を破砕して不織布及び防水シートを分離除去することなくパルプ成分を極めて容易で確実に且つ短時間に分離回収が行われる。
パルプ成分回収後の溶液には水溶性不織布を分解する菌を混入して残りのシート類が生分解され、環境に負荷を与えないで処理される。
【０００６】
【発明の実施の形態】
本発明の表面シート及び防水シートを構成する合成樹脂としては、水溶性で鹸過度９５以上、望ましくは９６以上のＰＶＡ（ポリビニルアルコール）が用いられ、おむつや尿取りパッドとして身体に装着している状態では不溶で、溶解温度が５０℃以上など人体の体温を超える温度の溶液で溶解し、溶解後の溶液はシュードモナス属細菌により生分解される。
吸水シートは綿状パルプのみを用いた単層のものでも良いが、高分子吸水ポリマー層の片面又は両面に綿状パルプを積層させた多層構造とすると吸水性がより向上して好ましい。
尿吸水体としては、バージンパルプの他、再生パルプ，高分子吸水ポリマー，水溶性不織布の表面シート，防水シートで構成された使用済のおむつや尿取りパッド等を破砕することなく分離槽に投入し、同分離槽内に塩化カルシウム等の多価金属イオンの離水剤と５０℃以上の温水を投入・混合して撹拌し、水溶性不織布を溶解する。高分子吸水ポリマーは電解質であるのでＨ２Ｏよりも強い力を持つ多価金属イオン（Ｃａ，Ｓｒ，Ｂａ）が存在すると、そのイオンとカルボキシン基（ＣＯＯ−）が結びついてＨ２Ｏが追い出され、脱水（離水）という現象が生じてパルプ成分が容易に回収される。回収したパルプ成分を更に比重分離槽で分離させ、上位部分の高品質のパルプを洗浄・殺菌・乾燥処理して得た綿状のパルプを再度尿吸水体のシート用パルプとして使用する。
以下、本発明の実施例を図面に基づいて具体的に説明する。
【０００７】
【実施例】
実施例（図１〜５参照）
図１〜５に示す実施例は、高分子吸水ポリマー層の両面にシート状の綿状パルプを積層した吸水シートを人体の体温を超える温度の溶液中で溶解する生分解性の不織布からなる表面シート及び防水シートで被覆して構成した尿吸水体の使用後の処理方法の例である。
図１は、実施例の使用済の尿吸水体の処理工程を示す説明図である。
図２は、実施例の使用済の尿吸水体の処理工程を示す説明図である。
図３は、実施例の尿吸水体の一例を示す使い捨ておむつの斜視図である。
図４は、図３のＡ−Ａ断面図である。
図５は、実施例の尿吸水体の一例を示す尿取りパッドの斜視図である。
【０００８】
図中、１は使い捨ておむつである。
２は吸水シートであって、高分子吸水ポリマー２ａの両面に綿状パルプ２ｂを積層一体化して３層構造としている。
３は表面シートであって、ＰＶＡ（ポリビニルアルコール）からなる水溶性不織布で、吸水シート２を包囲するように被覆して吸水シート２が型崩れしないようにしている。
４は防水シートであって、ＰＶＡ（ポリビニルアルコール）からなる水溶性不織布に防水加工を施したシートで、表面シート３で被覆された吸水シート２を下方から包囲するように被覆して、吸水した糞尿が外部に滲出しないようにしている。
５は伸縮部であって、着用者の太股に密着するようにゴム等で伸縮自在に形成している。
６は着用後に腰部が外れないようにする固定テープ、７は尿取りパッドである。
８は撹拌槽、９は溶液、１０は離水剤、１１は撹拌器、１２は撹拌器を駆動するモータ、１３はポンプ、１４はメッシュコンベヤ、１５は比重分離槽、１６は洗浄・殺菌工程、１７は脱水・乾燥工程、１８はシート成形工程、１９はポリマー分離槽、２０は浄化槽、２１は廃水処理工程、２２は分解菌、ｐは使用済の尿吸水体、Ｐは再生パルプ、Ｔは堆肥である。
【０００９】
まず、水溶化処理システムでは、図１に示すように使用済の尿吸水体（使い捨ておむつ又は尿取りパッド）ｐを５０℃以上の温水（溶液）９が貯水された撹拌槽８に離水剤１０とともに投入し、撹拌器１１で混合・撹拌すると尿吸水体ｐの表面シート３及び防水シート４が溶解して吸水シート２が放出される。又高分子吸水ポリマーは離水剤１０によって吸水した水分を脱水（離水）してポリマー分離槽１９に排水させ、回収を容易にする。
再生パルプＰを得るためには、メッシュコンベヤ１４でパルプ成分を抽出し、比重分離槽１５で更にパルプ成分を分離して品質別にパルプを回収し、洗浄・殺菌工程１６、脱水・乾燥工程１７を経て再生パルプＰを得る。上品質のパルプは更にシート状に加工して吸水シートに再利用される。残液は浄化槽２０に集められ、分解菌２２を投入して生分解し、廃水処理される。固型物は脱水・乾燥処理して堆肥Ｔとして利用される。
また、発酵分解処理システムでは、図２に示すように使用済の尿吸水体ｐを５０℃以上の温水（溶液）９が貯水された撹拌槽８に離水剤１０とともに投入して撹拌器１１で混合・撹拌し、表面シート３及び防水シート４を溶解させて吸水シート２を放出させるとともに、高分子吸水ポリマーを離水剤１０で脱水させる。次いで、これらを浄化槽２０に集めて分解菌２２で生分解し、脱水・乾燥処理して堆肥Ｔとして利用される。
【００１０】
本実施例ではこのように構成したから、表面シート３及び防水シート４が自然に溶解して内包された綿状パルプ２ｂ及び高分子吸水ポリマー２ａが外力を付与することなく分離され、従来のように細かく破砕して撹拌回収することなく容易且つ確実に短時間にパルプ成分を回収でき、しかもその回収パルプは細かな破砕片等の不純物を含んでおらず品質が良好なものである。従って、パルプ成分の回収する手間が簡略化されるからコストを低減でき、再生品を製造する際は価格を安価にして普及させることでリサイクルを進捗させることが可能となった。
【００１１】
【発明の効果】
以上説明したように、本発明によれば使用済のおむつや尿取りパッド等の尿吸水体を破砕することなく容易且つ確実に短時間にパルプ成分を回収し、しかも残りのシート類も生分解されることにより環境に負荷を与えることなく処理できる。
【図面の簡単な説明】
【図１】実施例の尿吸水体の使用後の処理工程を示す説明図である。
【図２】実施例の尿吸水体の使用後の処理工程を示す説明図である。
【図３】実施例の尿吸水体の一例を示す使い捨ておむつの斜視図である。
【図４】図３のＡ−Ａ断面図である。
【図５】実施例の尿吸水体の一例を示す尿取りパッドの斜視図である。
【符号の説明】
１　使い捨ておむつ
２　吸水シート
２ａ　高分子吸水ポリマー
２ｂ　綿状パルプ
３　表面シート
４　防水シート
５　伸縮部
６　固定テープ
７　尿取りパッド
８　撹拌槽
９　溶液
１０　離水剤
１１　撹拌器
１２　モータ
１３　ポンプ
１４　メッシュコンベヤ
１５　比重分離槽
１６　洗浄・殺菌工程
１７　脱水・乾燥工程
１８　シート成形工程
１９　ポリマー分離槽
２０　浄化槽
２１　廃水処理工程
２２　分解菌
ｐ　使用済みの尿吸水体
Ｐ　再生パルプ
Ｔ　堆肥[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for treating a urine absorbent such as a used diaper or urine absorbing pad after use, and more particularly, to easily and reliably collect pulp components without crushing the urine absorbent, TECHNICAL FIELD The present invention relates to a technology for processing a residue and a residual liquid without imposing a load on an environment.
[0002]
[Prior art]
Conventionally, non-woven fabrics such as rayon, polypropylene, and polyester are used on the upper surface of cotton-like pulp, and a polyethylene film or the like is mainly used as a waterproof sheet on the lower surface of urine absorbents such as disposable diapers and urine absorbing pads. There are two types of polyethylene, breathable (moisture permeable) and non-breathable. A material obtained by laminating a transparent moisture permeable film to the nonwoven fabric is used for tape diapers for babies and adults.
By the way, most of these used urine absorbents are incinerated as a temporary substance.In recent years, deforestation has a negative effect on the natural environment and carbon dioxide emissions generated during incineration have been reduced. The generation of dioxins has become a major problem.
To solve the problem, there are a fermentation decomposition treatment system (composting) and a water-solubilizing treatment system (pulp collection and recycling), and any of these methods is used for the current urine absorbent. The nonwoven fabric and the waterproof sheet have been separated into solid fuel after being collected or incinerated, and cannot be treated in the same manner as cotton-like pulp. That is, composting by the fermentation decomposition treatment system, the urine absorbent is crushed and put into the fermentation decomposition treatment machine, fermented and decomposed for several days and used as compost, but the nonwoven fabric and the waterproof sheet used in the urine absorbent are used. Is separated and collected before and after fermentation decomposition treatment, and is subjected to solid fuel or incineration treatment.
On the other hand, the recycling of recovered pulp by the water-solubilization treatment system involves crushing the urine absorbent and solubilizing it in a stirred tank mixed with a water-repellent agent, releasing the water absorbed by the polymer-absorbing polymer, and removing the non-woven fabric in a circulation separation tank. The pulp component is collected by removing the waterproof sheet and the pulp component is washed, sterilized, and dried to obtain a regenerated pulp, which is used again for the urine absorbent. Solid fuel or incineration treatment as described above.
As described above, the nonwoven fabric and the waterproof sheet separated and recovered in any of the methods require a trouble such as solid fuel or incineration, and have a problem of burden on the environment.
[0003]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to solve these conventional problems, and to easily and reliably recover pulp components in a short time without crushing a urine absorbent such as a used diaper or urine absorbing pad. Another object of the present invention is to provide a method of treating a urine absorbent after use and a urine absorbent that can be treated without imposing a load on the environment.
[0004]
[Means for Solving the Problems]
The configuration of the present invention that has solved such a problem includes:
1) A method for treating a urine absorbent after using a urine absorbent in which a pulp-absorbing sheet for absorbing urine is sealed with a topsheet, wherein all or a part of the topsheet is in a solution having a temperature exceeding the human body temperature. It is composed of a water-soluble material that dissolves, and the used urine water-absorbing body is immersed and stirred in a stirring tank containing a solution of the dissolution temperature of the topsheet, and the water-soluble material of the topsheet is dissolved to absorb water from the inside. A method of treating a urine absorbent after use, wherein the pulp component can be recovered without breaking the urine absorbent by releasing the sheet to separate the pulp component from the urine absorbent. Is composed of a combination of flocculent pulp and a high-molecular-weight water-absorbing polymer. A water-releasing agent is mixed into the stirring tank to release the water absorbed by the high-molecular-weight water-absorbing polymer, and the precipitated high-molecular-weight water-absorbing polymer is stirred. Discharge outside 3) The method of treating the urine absorbent according to the above 1) after use 3) A bacterium which decomposes the solution of the topsheet is mixed into the remaining solution from which the pulp component has been recovered, and the bacterium is used to dissolve the solution of the topsheet. The method of 1) or 2) above, wherein the water-absorbing body is subjected to wastewater treatment by biodegradation. 4) A pulp-containing water-absorbing sheet containing a high-molecular-weight water-absorbing polymer that absorbs urine is sealed with a topsheet. A method for treating a stopped urine absorbent after use, wherein the whole or a part of the topsheet is made of a water-soluble material that dissolves in a solution having a temperature higher than the body temperature of a human body, and the solution has a dissolution temperature of the topsheet. The used urine absorbent is immersed in a stirring tank containing water and stirred to dissolve the water-soluble material of the topsheet, release the water-absorbing sheet from the inside, and decompose the solution of the topsheet into the same solution. Biodegradation of the lysate by mixing A post-use treatment method of the urine absorbent, characterized in that the post-solution and the decomposed product of the urine absorbent are put into a septic tank for purification treatment, so that the material of the urine absorbent can be used for compost 5) Surface sheet The method for treating a urine absorbent according to any one of the above 1) to 4), wherein the solution temperature of the water-soluble material is 50 ° C. or higher 6) The above 1) to 5) wherein a part of the topsheet is waterproofed 7) The method for treating a urine absorbent according to any one of the above 1) to 6), wherein the water-soluble material of the topsheet is polyvinyl alcohol having an excess of 95 or more. 9) The treatment method after use of the urine absorbent according to any one of 1) to 7) above, wherein the urine absorbent is used as a diaper or a urine absorbing pad. Partially dissolved in solutions above the human body temperature 10) The urine absorbent according to 9) above, wherein the dissolving temperature of the water-soluble material of the surface sheet is 50 ° C. or higher. 11) The water-absorbent sheet is made of cotton-like pulp. 12) The urine absorbent according to 9) or 10), wherein the urine absorbent is composed of a combination of a polymer and a high-molecular-weight water-absorbing polymer. 13) The urine absorbent according to any one of 9) to 12) above, wherein the water-soluble material of the topsheet is polyvinyl alcohol having an excess of 95 or more. 14) The urine absorbent is used as a diaper or a urine absorbing pad. 9) to 13) The urine absorbent according to any one of the above.
[0005]
[Action]
According to the present invention, when the used urine absorbent is immersed in a solution maintained at the dissolving temperature of the topsheet and the waterproof sheet, the topsheet and the waterproof sheet dissolve and the water-absorbing sheet is released and separated. As described above, the pulp component can be separated and recovered extremely easily, reliably and in a short time without crushing the urine absorbent and separating and removing the nonwoven fabric and the waterproof sheet.
The solution after the recovery of the pulp component is mixed with bacteria that decompose the water-soluble nonwoven fabric, and the remaining sheets are biodegraded and treated without imposing any load on the environment.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
As a synthetic resin constituting the topsheet and the waterproof sheet of the present invention, PVA (polyvinyl alcohol) having a water solubility of 95 or more, desirably 96 or more is used, and is worn on the body as a diaper or urine absorbing pad. It is insoluble in the state and is dissolved in a solution having a dissolution temperature higher than the human body temperature such as 50 ° C. or higher, and the dissolved solution is biodegraded by Pseudomonas bacteria.
The water-absorbing sheet may be a single layer using only cotton-like pulp, but it is preferable to use a multi-layer structure in which cotton-like pulp is laminated on one or both sides of a polymer water-absorbing polymer layer because water absorption is further improved.
As a urine absorbing body, in addition to virgin pulp, used diapers and urine absorbing pads composed of recycled pulp, high-molecular water-absorbing polymer, surface sheet of water-soluble nonwoven fabric, and waterproof sheet are put into the separation tank without breaking. Then, a water releasing agent for polyvalent metal ions such as calcium chloride and warm water at 50 ° C. or higher are charged and mixed in the separation tank, and stirred to dissolve the water-soluble nonwoven fabric. Since the high-molecular-weight water-absorbing polymer is an electrolyte, if polyvalent metal ions (Ca, Sr, Ba) having a stronger force than H 2 O are present, the ions are combined with a carboxin group (COO-) to form H 2 O. The pulp is expelled and a phenomenon called dewatering (separation) occurs, and the pulp component is easily recovered. The collected pulp components are further separated in a specific gravity separation tank, and the high-quality pulp in the upper portion is washed, sterilized, and dried, and the cotton-like pulp is used again as a pulp for urine absorbent sheet.
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
[0007]
【Example】
Example (see FIGS. 1 to 5)
The embodiment shown in FIGS. 1 to 5 has a surface made of a biodegradable nonwoven fabric that dissolves a water-absorbing sheet in which sheet-like cotton-like pulp is laminated on both surfaces of a polymer water-absorbing polymer layer in a solution at a temperature higher than the human body temperature. It is an example of a processing method after use of a urine absorbent formed by covering with a sheet and a waterproof sheet.
FIG. 1 is an explanatory diagram illustrating a process of treating a used urine absorbent according to an embodiment.
FIG. 2 is an explanatory diagram illustrating a processing step of a used urine absorbent according to the embodiment.
FIG. 3 is a perspective view of a disposable diaper showing an example of the urine absorbent of the embodiment.
FIG. 4 is a sectional view taken along line AA of FIG.
FIG. 5 is a perspective view of a urine absorbing pad showing an example of the urine absorbent of the embodiment.
[0008]
In the figure, reference numeral 1 denotes a disposable diaper.
Reference numeral 2 denotes a water-absorbing sheet, which has a three-layer structure in which cotton-like pulp 2b is laminated and integrated on both surfaces of a high-molecular water-absorbing polymer 2a.
Reference numeral 3 denotes a topsheet, which is a water-soluble nonwoven fabric made of PVA (polyvinyl alcohol), and is coated so as to surround the water-absorbing sheet 2 so that the water-absorbing sheet 2 does not lose its shape.
Reference numeral 4 denotes a waterproof sheet, which is a sheet obtained by subjecting a water-soluble non-woven fabric made of PVA (polyvinyl alcohol) to waterproof processing, covering the water-absorbing sheet 2 covered with the top sheet 3 so as to surround it from below, and absorbing water. Manure does not seep outside.
Reference numeral 5 denotes an elastic portion, which is formed of rubber or the like so as to be stretchable so as to be in close contact with the wearer's thigh.
6 is a fixing tape for preventing the waist from coming off after wearing, and 7 is a urine absorbing pad.
8 is a stirring tank, 9 is a solution, 10 is a water release agent, 11 is a stirrer, 12 is a motor for driving the stirrer, 13 is a pump, 14 is a mesh conveyor, 15 is a specific gravity separation tank, 16 is a washing / sterilization process, 17 is a dehydration / drying step, 18 is a sheet forming step, 19 is a polymer separation tank, 20 is a septic tank, 21 is a wastewater treatment step, 22 is a decomposing bacterium, p is a used urine absorbent, P is recycled pulp, and T is It is compost.
[0009]
First, in the water-solubilizing treatment system, as shown in FIG. 1, a used urine absorbent (disposable diaper or urine absorbing pad) p is placed in a stirring tank 8 in which warm water (solution) 9 at 50 ° C. or higher is stored. When mixed and stirred by the stirrer 11, the top sheet 3 and the waterproof sheet 4 of the urine absorbent body p are dissolved and the water absorbing sheet 2 is released. The high-molecular-weight water-absorbing polymer dehydrates (separates) water absorbed by the water-releasing agent 10 and drains the water to the polymer separation tank 19, thereby facilitating recovery.
In order to obtain the recycled pulp P, the pulp component is extracted by the mesh conveyor 14, the pulp component is further separated in the specific gravity separation tank 15, and the pulp is collected by quality. Through the process, recycled pulp P is obtained. High quality pulp is further processed into a sheet and reused as a water absorbing sheet. The residual liquid is collected in the septic tank 20, and the degrading bacteria 22 are charged to biodegrade and treated for wastewater. The solid product is subjected to dehydration and drying treatment and used as compost T.
Further, in the fermentation decomposition treatment system, as shown in FIG. 2, the used urine absorbent p is charged together with a water releasing agent 10 into a stirring tank 8 in which warm water (solution) 9 having a temperature of 50 ° C. or higher is stored. After mixing and stirring, the topsheet 3 and the waterproof sheet 4 are dissolved to release the water-absorbing sheet 2, and the high-molecular-weight water-absorbing polymer is dehydrated by the water-releasing agent 10. Next, these are collected in the septic tank 20, biodegraded by the decomposing bacteria 22, dehydrated and dried, and used as compost T.
[0010]
In the present embodiment, since the surface sheet 3 and the waterproof sheet 4 are naturally dissolved, the cotton-like pulp 2b and the high-molecular-weight water-absorbing polymer 2a contained therein are separated without applying external force. The pulp component can be easily and reliably recovered in a short time without finely crushing and stirring and collecting the collected pulp. Further, the recovered pulp does not contain impurities such as fine crushed pieces and has good quality. Therefore, the labor for recovering the pulp component is simplified, so that the cost can be reduced. In the case of producing a recycled product, it is possible to promote recycling by lowering the price and disseminating it.
[0011]
【The invention's effect】
As described above, according to the present invention, pulp components can be easily and reliably recovered in a short time without crushing a urine absorbent such as a used diaper or urine absorbing pad, and the remaining sheets are also biodegraded. By doing so, processing can be performed without imposing a load on the environment.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a processing step after use of a urine absorbent according to an embodiment.
FIG. 2 is an explanatory view showing a processing step after using the urine absorbent of the embodiment.
FIG. 3 is a perspective view of a disposable diaper showing an example of the urine absorbent of the embodiment.
FIG. 4 is a sectional view taken along line AA of FIG. 3;
FIG. 5 is a perspective view of a urine absorbing pad showing an example of the urine absorbing body of the embodiment.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 disposable diaper 2 water-absorbing sheet 2 a high-molecular-weight water-absorbing polymer 2 b cotton-like pulp 3 surface sheet 4 waterproof sheet 5 elastic part 6 fixing tape 7 urine collecting pad 8 stirring tank 9 solution 10 water release agent 11 stirrer 12 motor 13 pump 14 mesh conveyor 15 Specific gravity separation tank 16 Washing / sterilization step 17 Dehydration / drying step 18 Sheet forming step 19 Polymer separation tank 20 Purification tank 21 Wastewater treatment step 22 Decomposing bacteria p Used urine absorbent P Regenerated pulp T Compost

Claims (14)

尿を吸水するパルプ質の吸水シートを表面シートで封止した尿吸水体の使用後の処理方法であって、前記表面シートの全部又は一部が人体の体温を超える温度の溶液中で溶解する水溶性素材で構成され、表面シートの溶解温度の溶液を貯水した撹拌槽内に使用済の尿吸水体を浸漬して撹拌し、表面シートの前記水溶性素材を溶解させて内部から吸水シートを放出させて、尿吸水体からパルプ成分を分離させ、尿吸水体を破砕することなくパルプ成分を回収できるようにしたことを特徴とする尿吸水体の使用後の処理方法。A method for treating a urine absorbent after using a urine absorbent in which a pulp-absorbing sheet that absorbs urine is sealed with a topsheet, wherein all or a part of the topsheet is dissolved in a solution having a temperature higher than the human body temperature. It is composed of a water-soluble material, and the used urine water absorbing body is immersed and stirred in a stirring tank containing a solution at the dissolution temperature of the topsheet, and the water-absorbing sheet is dissolved from the inside by dissolving the water-soluble material of the topsheet. A method for treating a urine absorbent after use, characterized in that the pulp component is separated from the urine absorbent by releasing the urine absorbent, and the pulp component can be recovered without crushing the urine absorbent. 吸水シートが綿状パルプと高分子吸水ポリマーとを組み合わせて構成されたもので、撹拌槽内に離水剤を混入して高分子吸水ポリマーの吸水した水分を離水させ、沈殿した高分子吸水ポリマーを撹拌槽外に排出するようにした請求項１記載の尿吸水体の使用後の処理方法。The water-absorbing sheet is made of a combination of cotton-like pulp and a high-molecular-weight water-absorbing polymer. The method for treating a urine absorbent according to claim 1, wherein the urine absorbent is discharged outside the stirring tank. パルプ成分を回収した残りの溶液中に表面シートの溶解液を分解する菌を混入し、同菌で表面シートの溶解液を生分解して廃水処理できるようにした請求項１又は２記載の尿吸水体の使用後の処理方法。The urine according to claim 1 or 2, wherein a bacterium that decomposes the solution of the topsheet is mixed into the remaining solution from which the pulp component has been recovered, and the bacterium is used to biodegrade the solution of the topsheet to enable wastewater treatment. Treatment method after use of water absorbent. 尿を吸水する高分子吸水ポリマーを含むパルプ質の吸水シートを表面シートで封止した尿吸水体の使用後の処理方法であって、前記表面シートの全部又は一部が人体の体温を超える温度の溶液中で溶解する水溶性素材で構成され、表面シートの溶解温度の溶液を貯水した撹拌槽内に使用済の尿吸水体を浸漬して撹拌し、表面シートの前記水溶性素材を溶解させて内部から吸水シートを放出させ、同溶液中に表面シートの溶解液を分解する菌を混入して溶解液を生分解し、その後溶液と尿吸水体の分解物を浄化槽に投入して浄化処理し、尿吸水体の材料を堆肥に利用できるようにしたことを特徴とする尿吸水体の使用後の処理方法。A method for treating a urine absorbent after use in which a pulp-containing water-absorbing sheet containing a high-molecular-weight water-absorbing polymer that absorbs urine is sealed with a surface sheet, wherein all or a part of the surface sheet exceeds the body temperature of a human body. The urine absorbent is immersed in a stirring tank containing a solution of the dissolution temperature of the topsheet and stored therein, and stirred to dissolve the water-soluble material of the topsheet. To release the water-absorbing sheet from the inside, mix bacteria that decompose the solution of the topsheet into the solution, biodegrade the solution, and then put the solution and the decomposed product of the urine absorbent into the purification tank to purify the solution. And a method of treating the urine absorbent after use, wherein the material of the urine absorbent can be used for compost. 表面シートの水溶性素材の溶液温度が５０℃以上である請求項１〜４いずれか記載の尿吸水体の使用後の処理方法。The method for treating a urine absorbent according to any one of claims 1 to 4, wherein the solution temperature of the water-soluble material of the topsheet is 50C or higher. 表面シートの一部を防水加工した請求項１〜５いずれか記載の尿吸水体の使用後の処理方法。The treatment method after use of the urine absorbent according to any one of claims 1 to 5, wherein a part of the topsheet is waterproofed. 表面シートの水溶性素材が鹸過度９５以上のポリビニルアルコールである請求項１〜６いずれか記載の尿吸水体の使用後の処理方法。7. The method according to any one of claims 1 to 6, wherein the water-soluble material of the topsheet is a polyvinyl alcohol having an excess of 95 or more. 尿吸水体がおむつ又は尿取りパッドとして使用されるものである請求項１〜７いずれか記載の尿吸水体の使用後の処理方法。The method for treating a urine absorbent according to any one of claims 1 to 7, wherein the urine absorbent is used as a diaper or a urine absorbing pad. 尿を吸水するパルプ質の吸水シートを全部又は一部が人体の体温を超える温度の溶液中で溶解する水溶性素材で構成された表面シートで封止した尿吸水体。A urine absorbent body in which a pulp absorbent sheet that absorbs urine is entirely or partially sealed with a surface sheet composed of a water-soluble material that dissolves in a solution having a temperature higher than the human body temperature. 表面シートの水溶性素材の溶解温度が５０℃以上である請求項９記載の尿吸水体。The urine absorbent according to claim 9, wherein the dissolution temperature of the water-soluble material of the topsheet is 50C or higher. 吸水シートが綿状パルプと高分子吸水ポリマーとを組み合わせて構成されたものである請求項９又は１０記載の尿吸水体。The urine absorbent according to claim 9 or 10, wherein the water-absorbing sheet is formed by combining cotton-like pulp and a high-molecular-weight water-absorbing polymer. 表面シートの一部を防水加工した請求項９〜１１いずれか記載の尿吸水体。The urine absorbent according to any one of claims 9 to 11, wherein a part of the topsheet is waterproofed. 表面シートの水溶性素材が鹸過度９５以上のポリビニルアルコールである請求項９〜１２いずれか記載の尿吸水体。The urine absorbent according to any one of claims 9 to 12, wherein the water-soluble material of the topsheet is polyvinyl alcohol having an excess of 95 or more. 尿吸水体がおむつ又は尿取りパッドとして使用されるものである請求項９〜１３いずれか記載の尿吸水体。The urine absorbent according to any one of claims 9 to 13, wherein the urine absorbent is used as a diaper or a urine absorbing pad.
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WO2009060893A1 (en) * 2007-11-08 2009-05-14 Matsumoto Nurse Sangyo Kabushiki Kaisha Paper diaper, method for treatment of used paper diaper, and apparatus for treatment of used paper diaper
JP2010059586A (en) * 2008-09-05 2010-03-18 Ishii Medical Service Kk Method for recycling and utilizing used paper diaper
WO2014007105A1 (en) * 2012-07-06 2014-01-09 日本製紙株式会社 Recycled fiber and recycled fiber molding
JP2015086483A (en) * 2013-10-30 2015-05-07 ユニ・チャーム株式会社 Method for producing recycled pulp from used sanitary product
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Publication number Priority date Publication date Assignee Title
WO2009060893A1 (en) * 2007-11-08 2009-05-14 Matsumoto Nurse Sangyo Kabushiki Kaisha Paper diaper, method for treatment of used paper diaper, and apparatus for treatment of used paper diaper
JP2010059586A (en) * 2008-09-05 2010-03-18 Ishii Medical Service Kk Method for recycling and utilizing used paper diaper
JPWO2014007105A1 (en) * 2012-07-06 2016-06-02 日本製紙株式会社 Recycled fiber and recycled fiber molded product
JP5624694B2 (en) * 2012-07-06 2014-11-12 日本製紙株式会社 Recycled fiber and recycled fiber molded product
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AU2013284626B2 (en) * 2012-07-06 2015-05-28 Nippon Paper Industries Co., Ltd. Recycled fiber and recycled fiber molding
CN104411881B (en) * 2012-07-06 2015-11-25 日本制纸株式会社 Regenerated fiber and regenerated fiber products formed
WO2014007105A1 (en) * 2012-07-06 2014-01-09 日本製紙株式会社 Recycled fiber and recycled fiber molding
JP2015086483A (en) * 2013-10-30 2015-05-07 ユニ・チャーム株式会社 Method for producing recycled pulp from used sanitary product
WO2015064209A1 (en) * 2013-10-30 2015-05-07 ユニ・チャーム株式会社 Process for manufacturing recycled pulp from used sanitary goods
US10280560B2 (en) 2013-10-30 2019-05-07 Unicharm Corporation Process for manufacturing recycled pulp from used sanitary goods
US10895039B2 (en) 2013-10-30 2021-01-19 Unicharm Corporation Process for manufacturing recycled pulp from used sanitary goods
CN107827246A (en) * 2017-11-07 2018-03-23 浙江师范大学 A kind of Combined Treatment agent for sanitary sewage disposal
EP4046706A4 (en) * 2019-10-18 2023-11-15 Sumitomo Seika Chemicals Co., Ltd. Method for regenerating water-absorbing resin particles

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