JP4303918B2 - Treatment method after use of urine absorbent and urine absorbent - Google Patents

Treatment method after use of urine absorbent and urine absorbent Download PDF

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JP4303918B2
JP4303918B2 JP2002169416A JP2002169416A JP4303918B2 JP 4303918 B2 JP4303918 B2 JP 4303918B2 JP 2002169416 A JP2002169416 A JP 2002169416A JP 2002169416 A JP2002169416 A JP 2002169416A JP 4303918 B2 JP4303918 B2 JP 4303918B2
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water
urine
absorbing
sheet
pulp
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JP2004009007A (en
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武志 長
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ケア・ルートサービス株式会社
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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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  • Absorbent Articles And Supports Therefor (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Processing Of Solid Wastes (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

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成分を含んだ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撹拌により内部から吸水シートを放出させ、同撹拌槽の槽液をポンプで排出してメッシュコンベヤに移載して吸水シートの使用済みのパルプ成分を抽出し、その後抽出した使用済みのパルプ成分を洗浄・殺菌・脱水・乾燥してパルプ成分を回収する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） 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）〜３）いずれか記載の尿吸水体の使用後の処理方法
５） 表面シートの一部を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防水加工した前記１）〜４）いずれか記載の尿吸水体の使用後の処理方法
６） 表面シート及びその一部の防水加工面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）〜５）いずれか記載の尿吸水体の使用後の処理方法
７） 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）〜６）いずれか記載の尿吸水体の使用後の処理方法
８） 尿を吸水するパルプ成分を含んだ吸水シートを全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
９） 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８）記載の尿吸水体
１０） 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８）又は９）記載の尿吸水体
１１） 表面シートの一部を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防水加工した前記８）〜１０）いずれか記載の尿吸水体
１２） 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８）〜１１）いずれか記載の尿吸水体
１３） 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８）〜１２）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、表面シートが溶解し、しかも撹拌することで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使用済みの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加工したシートである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１〜４参照）
図１〜４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３は、図３のＡ−Ａ断面図である。
図４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。
【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一例を示す使い捨ておむつの斜視図である。
【図３】 図３のＡ−Ａ断面図である。
【図４】 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]
BACKGROUND OF THE INVENTION
The present invention relates to a treatment method after use of a urine absorbent body such as a used diaper or a urine absorbing pad, and more specifically, the pulp components can be easily and reliably collected without crushing the urine absorbent body, and after the pulp is collected. The present invention relates to a technology that makes it possible to process residues and liquids without causing environmental impact.
[0002]
[Prior art]
Conventionally, urine absorbent bodies such as disposable diapers and urine pads have been mainly used as a non-woven fabric such as rayon, polypropylene, polyester on the upper surface of cotton-like pulp, and a polyethylene film or the like as a waterproof sheet on the lower surface. Polyethylene is classified into breathable (moisture permeable) and non-breathable, and a transparent moisture permeable film laminated on the nonwoven fabric is used for baby and adult tape-type diapers.
By the way, most of these used urine absorbers are incinerated as a temporary product, and in recent years, deforestation has an adverse effect on the natural environment and carbon dioxide emissions generated during incineration, The generation of dioxins is a big problem.
Therefore, as a solution, there are a fermentation decomposition treatment system (composting) and a water solubilization treatment system (pulp recovery and recycling), and any of these methods are used for the current urine absorbent body. Non-woven fabrics and waterproof sheets have been separated and recovered and turned into solid fuel or incinerated, and could not be treated in the same way as cotton-like pulp.
That is, composting by the fermentation decomposition treatment system crushes the urine water absorbent and puts it in the fermentation decomposition treatment machine, fermented and decomposes it for several days and uses it as compost, but the nonwoven fabric and waterproof sheet used in the urine water absorbent Is separately collected before and after the fermentation decomposition treatment, and is solid fuel or incinerated.
On the other hand, the recovered pulp can be recycled using the water-solubilization treatment system. The urine water-absorbing body is crushed and water-solubilized in a stirring tank mixed with a water-removing agent, and the water absorbed by the polymer-absorbing polymer is removed. And the waterproof sheet is removed and the pulp component is recovered, and the pulp component is washed, sterilized and dried to obtain a regenerated pulp, which is used again for the urine absorbent, but the remaining nonwoven fabric and waterproof sheet after recovery are Solid fuel or incineration treatment is performed as described above.
Thus, in any method, the nonwoven fabric and the waterproof sheet separated and recovered have a problem of requiring burdens such as solid fuel or incineration and environmental load.
[0003]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to solve these conventional problems and recover pulp components easily and reliably in a short time without crushing urine absorbent bodies such as used diapers and urine collecting pads. Another object of the present invention is to provide a treatment method after use of a urine water-absorbing body and a urine water-absorbing body that can be treated without giving a load to the environment.
[0004]
[Means for Solving the Problems]
The configuration of the present invention that solves this problem is as follows.
1) A method for processing after use of the urine absorbent structure sealing the water seat containing the pulp components to water the urine topsheet, a solution temperature of all parts of the topsheet is above the body temperature of the human body internal consists of dissolving a water-soluble material, a urine absorbent core of spent solutions of the melting temperature of the topsheet in the water was stirred tank stirred by dipping, stirring to dissolve the water soluble material topsheet The water absorbing sheet is discharged from the tank, the tank liquid in the same agitation tank is discharged with a pump and transferred to a mesh conveyor to extract used pulp components from the water absorbing sheet, and then the used pulp components extracted are washed and sterilized. -Treatment method 2 after use of the urine water-absorbing body, characterized in that the pulp component is recovered by dehydration and drying. The water-absorbing sheet is composed of a combination of cotton-like pulp and a polymer water-absorbing polymer. Water release agent inside The treatment method after use of the urine water-absorbing body as described in 1) above, wherein the water absorbed by the polymer water-absorbing polymer is separated and the precipitated polymer water-absorbing polymer is discharged out of the stirring tank. The urine absorbent according to 1) or 2), wherein a bacterium that decomposes the lysate of the surface sheet is mixed in the remaining solution collected, and the lysate of the surface sheet is biodegraded with the bacterium so that the wastewater can be treated. the processing method 4 after use) the solution temperature of the water-soluble material of the surface sheet is 50 ° C. or higher 1) to 3) Accounting 5 after use of the urine absorbent structure according to any) part of the surface sheet The treatment method after use of the urine absorbent body according to any one of the above 1) to 4), which is waterproofed with a water-soluble material that dissolves in a solution having a temperature exceeding the body temperature of the human body 6) Top sheet and a part of the waterproof surface The water-soluble material is polyvinyl alcohol with over 95 sapon The treatment method after use of the urine absorbent according to any one of 1) to 5) that is a call 7) The urine absorbent according to any one of 1) to 6), wherein the urine absorbent is used as a diaper or a urine collecting pad . Treatment method after use of the urine absorbent 8) The water absorbent sheet containing the pulp component that absorbs urine was sealed with a top sheet made of a water-soluble material that dissolves in a solution whose temperature exceeds the body temperature of the human body. The urine absorbent body 9) The urine absorbent body 10) according to the above 8), wherein the water-soluble material of the surface sheet has a melting temperature of 50 ° C. or higher. The water absorbent sheet is a combination of cotton-like pulp and a polymer water-absorbing polymer. The urine according to any one of 8) to 10), wherein a part of the urine absorbent body 11) according to 8) or 9) is waterproofed with a water-soluble material that dissolves in a solution having a temperature exceeding the body temperature of the human body. water-soluble element of the water absorber 12) topsheet The 8) to 12) according to any one but in which the polyvinyl alcohol above鹸過of 95 8) to 11) Urine absorbent structure 13 according any) urine absorbent structure is used as a diaper or incontinence pad Urine water absorber.
[0005]
[Action]
According to the present invention, when immersing the urine absorbent structure of spent in the solution was maintained at the melting temperature of the surface sheet, dissolve the surface sheet, moreover separated water sheet is discharged by stirring, conventional Thus, the used pulp components can be separated and recovered in an extremely easy and reliable manner in a short time without crushing the urine absorbent and separating and removing the nonwoven fabric and the waterproof sheet.
The solution after recovering the pulp components is mixed with bacteria that decompose the water-soluble nonwoven fabric, and the remaining sheets are biodegraded and processed without causing a load on the environment.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
As the synthetic resin constituting the waterproof sheet, which is the surface sheet and the waterproof sheet of the present invention, PVA (polyvinyl alcohol) that is water-soluble and has an excess of 95 or more, preferably 96 or more, is used as a diaper or urine removing pad. It is insoluble when worn on the body, and is dissolved in a solution having a melting temperature exceeding 50 ° C., 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 a multilayer structure in which cotton-like pulp is laminated on one side or both sides of the polymer water-absorbing polymer layer is preferable because water absorption is further improved.
In addition to virgin pulp, recycled urine, polymer water-absorbing polymer, water-soluble non-woven fabric surface sheet, used diaper and urine collecting pad, etc. are put into the separation tank without crushing as urine absorbents. Then, a water separation agent of polyvalent metal ions such as calcium chloride and warm water of 50 ° C. or higher are charged and mixed in the separation tank and stirred to dissolve the water-soluble nonwoven fabric. Since the polymer water-absorbing polymer is an electrolyte, if a polyvalent metal ion (Ca, Sr, Ba) having a stronger force than H 2 O is present, the ion and the carboxin group (COO—) are combined to form H 2 O. It is expelled and the phenomenon of dehydration (water separation) occurs, and the pulp component is easily recovered. The recovered pulp components are further separated in a specific gravity separation tank, and the cotton-like pulp obtained by washing, sterilizing and drying the high-quality pulp in the upper portion is used again as the sheet pulp of the urine absorbent.
Embodiments of the present invention will be specifically described below with reference to the drawings.
[0007]
【Example】
Example (see FIGS. 1 to 4 )
The embodiment shown in FIGS. 1 to 4 is a surface made of a biodegradable nonwoven fabric in which a water-absorbing sheet in which sheet-like cotton-like pulp is laminated on both sides of a polymer water-absorbing polymer layer is dissolved in a solution having a temperature exceeding the body temperature of the human body. It is an example of the processing method after use of a urine water absorption object constituted by covering with a sheet and a waterproof sheet.
FIG. 1 is an explanatory diagram illustrating a treatment process for a used urine absorbent body according to an embodiment.
FIG. 2 is a perspective view of a disposable diaper showing an example of the urine absorbent body of the embodiment.
FIG. 3 is a cross-sectional view taken along the line AA of FIG.
FIG. 4 is a perspective view of a urine absorbing pad showing an example of the urine absorbent body of the embodiment.
[0008]
In the figure, 1 is 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 the polymer water-absorbing polymer 2a.
Reference numeral 3 denotes a surface sheet, which is a water-soluble nonwoven fabric made of PVA (polyvinyl alcohol) and covers the water-absorbing sheet 2 so as not to lose its shape.
4 is a waterproof sheet, which is a water-soluble non-woven fabric made of PVA (polyvinyl alcohol) and waterproofed. The water-absorbent sheet 2 covered with the top sheet 3 is covered from below to absorb water. Manure is prevented from exuding to the outside.
Reference numeral 5 denotes an expansion / contraction part, which is formed to be elastic with rubber or the like so as to be in close contact with the wearer's thigh.
Reference numeral 6 denotes a fixing tape that prevents the waist from being removed after wearing, and 7 is a urine collecting pad.
8 is a stirring tank, 9 is a solution, 10 is a water releasing agent, 11 is a stirrer, 12 is a motor that drives the stirrer, 13 is a pump, 14 is a mesh conveyor, 15 is a specific gravity separation tank, 16 is a cleaning / sterilization process, 17 is a dehydration / drying process, 18 is a sheet forming process, 19 is a polymer separation tank, 20 is a septic tank, 21 is a wastewater treatment process, 22 is a decomposing fungus, p is a used urine absorber, P is a regenerated pulp, and T is It is compost.
[0009]
First, in the water-solubilization treatment system, as shown in FIG. 1, a used urine absorbent body (disposable diaper or urine removing pad) p is mixed with a water separating agent 10 in a stirring tank 8 in which warm water (solution) 9 at 50 ° C. or higher is stored. When it is put together and mixed and stirred by the stirrer 11, the surface sheet 3 and the waterproof sheet 4 of the urine water absorbent p are dissolved and the water absorbent sheet 2 is released. Further, the polymer water-absorbing polymer dehydrates (removes) the water absorbed by the water separating agent 10 and drains it into the polymer separation tank 19 to facilitate recovery.
In order to obtain recycled pulp P, the pulp components are extracted by the mesh conveyor 14, the pulp components are further separated by the specific gravity separation tank 15, and the pulp is recovered according to quality, and the washing / sterilization step 16 and the dehydration / drying step 17 are performed. Then, recycled pulp P is obtained. The high-quality pulp is further processed into a sheet and reused as a water absorbent sheet. The residual liquid is collected in the septic tank 20, biodegraded by introducing the decomposing bacteria 22, and treated with waste water. Solid matter is Ru is used as compost T treated dehydrated and dried.
[0010]
Since this embodiment is configured in this manner, the cotton-like pulp 2b and the polymer water-absorbing polymer 2a in which the surface sheet 3 and the waterproof sheet 4 are naturally dissolved and encapsulated are separated without applying external force, The pulp components can be easily and reliably recovered in a short time without being finely crushed and recovered by stirring, and the recovered pulp does not contain impurities such as finely crushed pieces and has good quality. Therefore, it is possible to reduce the cost because the labor for collecting the pulp component is simplified, and it is possible to progress the recycling by making the price low and popularizing when producing a recycled product.
[0011]
【The invention's effect】
As described above, according to the present invention, pulp components can be collected easily and reliably in a short time without crushing urine absorbent bodies such as used diapers and urine removing pads, and the remaining sheets can be biodegraded. By doing so, processing can be performed without giving a load to the environment.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a treatment process after use of a urine absorbent body according to an embodiment.
FIG. 2 is a perspective view of a disposable diaper showing an example of a urine absorbent body according to an embodiment.
3 is a cross-sectional view taken along the line AA in FIG.
FIG. 4 is a perspective view of a urine absorbing pad showing an example of a urine absorbent body according to an embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Water absorbing sheet 2a Polymer water absorbing polymer 2b Cotton-like pulp 3 Top sheet 4 Waterproof sheet 5 Stretching part 6 Fixing tape 7 Urine removal pad 8 Stirrer tank 9 Solution 10 Water release agent 11 Stirrer 12 Motor 13 Pump 14 Mesh conveyor 15 Specific gravity separation tank 16 Cleaning / sterilization process 17 Dehydration / drying process 18 Sheet forming process 19 Polymer separation tank 20 Septic tank 21 Wastewater treatment process 22 Decomposing bacteria p Used urine absorbent P Regenerated pulp T Compost

Claims (13)

尿を吸水するパルプ成分を含んだ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撹拌により内部から吸水シートを放出させ、同撹拌槽の槽液をポンプで排出してメッシュコンベヤに移載して吸水シートの使用済みのパルプ成分を抽出し、その後抽出した使用済みのパルプ成分を洗浄・殺菌・脱水・乾燥してパルプ成分を回収することを特徴とする尿吸水体の使用後の処理方法。A method for processing after use of the urine absorbent structure sealing the water seat containing the pulp components to water the urine topsheet, all parts of the topsheet is dissolved at a temperature of the solution in more than the body temperature of the human body A used urine absorbent body is immersed in an agitation tank that is made of a water-soluble material and stores a solution at the dissolution temperature of the surface sheet, and stirred to dissolve the water-soluble material in the surface sheet and absorb water from the inside by stirring. Release the sheet, discharge the tank liquid of the same agitation tank with a pump and transfer it to the mesh conveyor to extract the used pulp component of the water absorbent sheet, and then wash, sterilize and dehydrate the used pulp component extracted A treatment method after use of the urine water-absorbing body, wherein the pulp component is recovered by drying . 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 composed of a combination of cotton-like pulp and a polymer water-absorbing polymer. A water-absorbing agent is mixed into the agitation tank to separate the water absorbed by the polymer water-absorbing polymer, and the precipitated polymer water-absorbing polymer is removed. The processing method after use of the urine water-absorbing body according to claim 1, wherein the urine absorbing body is discharged out of 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 capable of decomposing the lysate of the surface sheet is mixed in the remaining solution from which the pulp components are recovered, and the lysate of the surface sheet is biodegraded by the bacterium so that the wastewater treatment can be performed. Treatment method after use of water absorber. 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１〜３いずれか記載の尿吸水体の使用後の処理方法。The processing method after use of the urine water-absorbing body according to any one of claims 1 to 3, wherein the solution temperature of the water-soluble material of the topsheet is 50 ° C or higher . 表面シートの一部を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防水加工した請求項１〜４いずれか記載の尿吸水体の使用後の処理方法。The processing method after use of the urine water absorbing body according to any one of claims 1 to 4, wherein a part of the surface sheet is waterproofed with a water-soluble material that dissolves in a solution having a temperature exceeding the body temperature of the human body . 表面シート及びその一部の防水加工面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１〜５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 water-absorbing body according to any one of claims 1 to 5 , wherein the water-soluble material of the top sheet and a part of the waterproof surface 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１〜６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 water absorbing body according to any one of claims 1 to 6, wherein the urine water absorbing body is used as a diaper or a urine collecting pad . 尿を吸水するパルプ成分を含んだ吸水シートを全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 water-absorbing body in which a water-absorbing sheet containing a pulp component that absorbs urine is sealed with a surface sheet made of a water-soluble material that dissolves in a solution whose temperature exceeds the body temperature of the human body. 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８記載の尿吸水体。 The urine water-absorbing body according to claim 8, wherein the melting temperature of the water-soluble material of the top sheet is 50 ° C. 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８又は９記載の尿吸水体。The urine water-absorbing body according to claim 8 or 9, wherein the water-absorbing sheet is composed of a combination of cotton-like pulp and a polymer water-absorbing polymer . 表面シートの一部を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防水加工した請求項８〜１０いずれか記載の尿吸水体。The urine water-absorbent body according to any one of claims 8 to 10, wherein a part of the surface sheet is waterproofed with a water-soluble material that dissolves in a solution having a temperature exceeding the body temperature of the human body. 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８〜１１いずれか記載の尿吸水体。The urine water-absorbing body according to any one of claims 8 to 11, wherein the water-soluble material of the surface sheet 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８〜１２いずれか記載の尿吸水体。 The urine water absorbing body according to any one of claims 8 to 12 , wherein the urine water absorbing body is used as a diaper or a urine collecting pad .
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