JP2019071830A - Water absorption treatment material and production method thereof - Google Patents

Water absorption treatment material and production method thereof Download PDF

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JP2019071830A
JP2019071830A JP2017200695A JP2017200695A JP2019071830A JP 2019071830 A JP2019071830 A JP 2019071830A JP 2017200695 A JP2017200695 A JP 2017200695A JP 2017200695 A JP2017200695 A JP 2017200695A JP 2019071830 A JP2019071830 A JP 2019071830A
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water absorption
core
manufacturing
covering portion
treatment material
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JP7057611B2 (en
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隼士 吉永
Hayashi Yoshinaga
隼士 吉永
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Daiki Co Ltd
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Abstract

To provide a water absorption treatment material excellent in lump strength of a used granular material; and to provide a production method thereof.SOLUTION: A water absorption treatment material 1 comprises a plurality of granular materials 10. The granular material 10 has a granular core part 12, a covering part 14 (first covering part) and a covering part 16 (second covering part). The core part 12 has an open hole 13. The covering part 14 contains an adhesive material which is provided on the external surface of the core part 12. The covering part 16 contains an adhesive material which is provided inside the open hole 13.SELECTED DRAWING: Figure 3

Description

本発明は、液体を吸収する吸水処理材及びその製造方法に関する。   The present invention relates to a water absorbing material that absorbs a liquid and a method of manufacturing the same.

特許文献１には、吸水処理材の一種である***物処理材が記載されている。同文献に記載された***物処理材は、尿を吸収する複数の粒状体からなる。各粒状体は、吸水性を有する粒状の芯部と、芯部を覆う被覆部とを備えている。被覆部は、接着性材料を含有しており、尿を吸収した粒状体どうしを相互に接着させる機能を有する。   Patent Document 1 describes an excrement treating material which is a kind of water absorption treating material. The excrement treating material described in the document consists of a plurality of particulates that absorb urine. Each granular body is provided with a granular core portion having water absorbency and a covering portion covering the core portion. The covering portion contains an adhesive material, and has a function of mutually adhering particulates which have absorbed urine.

特開２００７−１９００２６号公報Japanese Patent Application Publication No. 2007-190026

このように粒状体の固まりが形成されることにより、未使用の粒状体と使用済みの粒状体とが混在する吸水処理材の中から、使用済みの粒状体を選択的に除去することが容易になる。しかしながら、従来の吸水処理材には、粒状体の固まり強度の面で向上の余地があった。   As a result of the formation of clumps of particulates in this way, it is easy to selectively remove used particulates from the water-absorbent material in which unused particulates and used particulates are mixed. become. However, the conventional water absorption treatment material has room for improvement in terms of the solidity of the granular material.

本発明は、上記課題に鑑みてなされたものであり、使用済みの粒状体の固まり強度に優れた吸水処理材、及びその製造方法を提供することを目的とする。   The present invention is made in view of the above-mentioned subject, and an object of the present invention is to provide a water absorption processing material excellent in clump strength of used granular material, and a manufacturing method for the same.

本発明による吸水処理材は、複数の粒状体からなる吸水処理材であって、上記各粒状体は、貫通孔を有する粒状の芯部と、接着性材料を含有し、上記芯部の外表面上に設けられた第１の被覆部と、接着性材料を含有し、上記貫通孔の内部に設けられた第２の被覆部と、を備えることを特徴とする。   The water absorption treatment material according to the present invention is a water absorption treatment material comprising a plurality of particles, wherein each of the particles contains a particulate core having through holes and an adhesive material, and the outer surface of the core is A first covering portion provided on the upper side, and a second covering portion containing an adhesive material and provided in the inside of the through hole are characterized.

この吸水処理材においては、芯部が貫通孔を有している。そして、芯部の外表面上に第１の被覆部が設けられるとともに、貫通孔の内部に第２の被覆部が設けられている。この場合、芯部が貫通孔を有しない場合に比して、芯部における被覆部（第１及び第２の被覆部）が設けられる部分の表面積を大きくすることが可能である。これにより、使用済みの粒状体の固まり強度を高めることができる。   In this water absorption treated material, the core portion has a through hole. And while a 1st coating | coated part is provided on the outer surface of a core part, the 2nd coating | coated part is provided in the inside of a through-hole. In this case, it is possible to increase the surface area of the portion provided with the covering portions (first and second covering portions) in the core portion as compared with the case where the core portion does not have the through hole. This makes it possible to increase the mass strength of the used particles.

また、本発明による吸水処理材の製造方法は、複数の粒状体からなる吸水処理材を製造する方法であって、上記各粒状体を構成し、貫通孔を有する粒状の芯部を形成する芯部形成工程と、上記芯部の外表面上に、接着性材料を含有する第１の被覆部を形成する第１の被覆部形成工程と、上記貫通孔の内部に、接着性材料を含有する第２の被覆部を形成する第２の被覆部形成工程と、を含むことを特徴とする。   Further, a method of manufacturing a water absorption treated material according to the present invention is a method of manufacturing a water absorption treated material composed of a plurality of particles, and a core for forming each of the particles and forming a particulate core having a through hole. An adhesive material is contained in the inside of the through hole, and a first coating portion forming step of forming a first coating portion containing an adhesive material on an outer surface of the core portion; And a second covering portion forming step of forming a second covering portion.

この製造方法においては、貫通孔を有する芯部が形成される。そして、芯部の外表面上に第１の被覆部が形成されるとともに、貫通孔の内部に第２の被覆部が形成される。この場合、芯部が貫通孔を有しない場合に比して、芯部における被覆部（第１及び第２の被覆部）が設けられる部分の表面積を大きくすることが可能である。これにより、製造後の吸水処理材において、使用済みの粒状体の固まり強度を高めることができる。   In this manufacturing method, a core having a through hole is formed. And while a 1st coating | coated part is formed on the outer surface of a core part, a 2nd coating | coated part is formed in the inside of a through-hole. In this case, it is possible to increase the surface area of the portion provided with the covering portions (first and second covering portions) in the core portion as compared with the case where the core portion does not have the through hole. Thereby, in the water absorption processed material after manufacture, the solidity strength of the used granular material can be raised.

本発明によれば、使用済みの粒状体の固まり強度に優れた吸水処理材、及びその製造方法が実現される。   ADVANTAGE OF THE INVENTION According to this invention, the water absorption processing material excellent in the lump strength of the used granular material, and its manufacturing method are implement | achieved.

本発明による吸水処理材の一実施形態を示す模式図である。It is a schematic diagram which shows one Embodiment of the water absorption process material by this invention. 粒状体１０を示す斜視図である。It is a perspective view showing granular object 10. 図２のIII−III線に沿った断面図である。It is sectional drawing along the III-III line of FIG. 芯部１２を示す斜視図である。It is a perspective view showing core part 12. As shown in FIG. ダイス６０を示す端面図である。It is an end elevation showing a die 60. ダイス孔６２を示す平面図である。FIG. 6 is a plan view showing a die hole 62. 変形例に係る粒状体１０を示す斜視図である。It is a perspective view showing granular object 10 concerning a modification. 図７のVIII−VIII線に沿った断面図である。It is sectional drawing along the VIII-VIII line of FIG.

以下、図面を参照しつつ、本発明の実施形態について詳細に説明する。なお、図面の説明においては、同一要素には同一符号を付し、重複する説明を省略する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description.

図１は、本発明による吸水処理材の一実施形態を示す模式図である。吸水処理材１は、複数の粒状体１０からなる。各粒状体１０は、吸水性を有しており、処理対象となる液体を吸収する。吸水処理材１は、例えば、人又は動物の***物を吸収処理する***物処理材である。   FIG. 1 is a schematic view showing an embodiment of a water absorption treatment material according to the present invention. The water absorption treatment material 1 is composed of a plurality of granular bodies 10. Each granular body 10 has water absorbency and absorbs a liquid to be treated. The water absorption treated material 1 is, for example, an excrement treated material that absorbs and processes human or animal excrement.

図２は、粒状体１０を示す斜視図である。また、図３は、図２のIII−III線に沿った断面図である。粒状体１０は、芯部１２、被覆部１４（第１の被覆部）、及び被覆部１６（第２の被覆部）を有している。芯部１２、被覆部１４及び被覆部１６は、何れも吸水性を有している。   FIG. 2 is a perspective view showing the granular material 10. 3 is a cross-sectional view taken along the line III-III in FIG. The granular material 10 has a core portion 12, a covering portion 14 (first covering portion), and a covering portion 16 (second covering portion). The core portion 12, the covering portion 14 and the covering portion 16 all have water absorbency.

図４は、芯部１２を示す斜視図である。芯部１２は、粒状をしている。芯部１２は、貫通孔１３を有している。具体的には、本実施形態において芯部１２は、略円筒状をしている。貫通孔１３は、芯部１２を貫通している。これにより、芯部１２の内部には、貫通孔１３からなる略円柱状の空間が広がっている。芯部１２の内径ｄ１（貫通孔１３の径）は、芯部１２の外径ｄ２の５０％以上であることが好ましく、７０％以上であることがより好ましい。   FIG. 4 is a perspective view showing the core 12. The core 12 is granular. The core 12 has a through hole 13. Specifically, in the present embodiment, the core 12 has a substantially cylindrical shape. The through hole 13 penetrates the core 12. As a result, a substantially cylindrical space consisting of the through holes 13 is expanded inside the core 12. The inner diameter d1 of the core 12 (the diameter of the through hole 13) is preferably 50% or more of the outer diameter d2 of the core 12, and more preferably 70% or more.

芯部１２は、液体を吸水及び保水する機能を有している。芯部１２は、有機物を主材料とすることが好ましい。ここで、芯部１２の主材料とは、芯部１２を構成する材料のうち、当該芯部１２に占める重量割合が最大のものをいう。有機物としては、例えば、紙類、茶殻、プラスチック類又はオカラを用いることができる。   The core 12 has a function of absorbing and retaining liquid. The core portion 12 preferably contains an organic substance as a main material. Here, the main material of the core portion 12 refers to the material constituting the core portion 12 that has the largest weight ratio in the core portion 12. As the organic substance, for example, papers, tea shells, plastics or okara can be used.

紙類は、パルプを主体とする材料をいう。紙類としては、例えば、通常の紙の他にも、塩ビ壁紙分級物（塩ビ壁紙を分級することにより得られる紙）、フラッフパルプ、製紙スラッジ、パルプスラッジ等が挙げられる。プラスチック類としては、例えば、紙おむつ分級物（紙おむつを分級することにより得られるプラスチック）を用いてもよい。オカラは、乾燥オカラであることが好ましい。   Papers refer to materials mainly composed of pulp. Examples of the paper include, in addition to ordinary paper, polyvinyl chloride wallpaper classification (paper obtained by classifying polyvinyl chloride wallpaper), fluff pulp, papermaking sludge, pulp sludge and the like. As plastics, you may use a disposable diaper classification (plastic obtained by classifying a disposable diaper), for example. Okara is preferably dried Okara.

図３に戻って、被覆部１４は、芯部１２の外表面上に設けられている。ここで、芯部１２の外表面とは、芯部１２の表面のうち、内表面（貫通孔１３の内面）を除く部分をいう。被覆部１４は、芯部１２の外表面の全体上に設けられている。換言すれば、芯部１２の外表面全体が被覆部１４によって覆われている。   Returning to FIG. 3, the covering portion 14 is provided on the outer surface of the core portion 12. Here, the outer surface of the core portion 12 refers to a portion of the surface of the core portion 12 excluding the inner surface (the inner surface of the through hole 13). The covering portion 14 is provided on the entire outer surface of the core portion 12. In other words, the entire outer surface of the core portion 12 is covered by the covering portion 14.

被覆部１４は、液体を吸収した粒状体１０どうしを接着させて固まりにする機能（固まり形成機能）を有している。被覆部１４は、有機物を主材料とすることが好ましい。被覆部１４は、接着性材料を含有している。接着性材料としては、例えば、吸水性ポリマー、澱粉、ＣＭＣ（カルボキシメチルセルロース）、ＰＶＡ（ポリビニルアルコール）、デキストリン等が挙げられる。本実施形態において被覆部１４は、接着性材料として吸水性ポリマーを含有している。   The covering portion 14 has a function (mass forming function) of adhering and solidifying the particles 10 which have absorbed the liquid. The covering portion 14 preferably contains an organic substance as a main material. The covering portion 14 contains an adhesive material. Examples of the adhesive material include water-absorbent polymers, starch, CMC (carboxymethylcellulose), PVA (polyvinyl alcohol), dextrin and the like. In the present embodiment, the covering portion 14 contains a water absorbing polymer as an adhesive material.

被覆部１６は、貫通孔１３の内部に設けられている。被覆部１６は、貫通孔１３の内部の全体に設けられている。すなわち、貫通孔１３の内部全体に被覆部１６が埋設されている。それゆえ、芯部１２の内表面全体が被覆部１６によって覆われている。   The covering portion 16 is provided inside the through hole 13. The covering portion 16 is provided on the entire inside of the through hole 13. That is, the covering portion 16 is embedded in the entire inside of the through hole 13. Therefore, the entire inner surface of the core portion 12 is covered by the covering portion 16.

被覆部１６も、固まり形成機能を有している。被覆部１６は、有機物を主材料とすることが好ましい。被覆部１６は、接着性材料を含有している。本実施形態において被覆部１６は、接着性材料として吸水性ポリマーを含有している。   The covering portion 16 also has a mass forming function. The covering portion 16 preferably contains an organic substance as a main material. The covering portion 16 contains an adhesive material. In the present embodiment, the covering portion 16 contains a water absorbing polymer as an adhesive material.

被覆部１６は、被覆部１４と同一の組成の材料からなっていてもよいし、被覆部１４と異なる組成の材料からなっていてもよい。後者の場合、被覆部１６に占める吸水性ポリマーの重量割合は、被覆部１４に占める吸水性ポリマーの重量割合よりも大きいことが好ましい。   The covering portion 16 may be made of a material having the same composition as the covering portion 14 or may be made of a material having a different composition than the covering portion 14. In the latter case, it is preferable that the weight ratio of the water-absorbing polymer in the covering portion 16 be larger than the weight ratio of the water-absorbing polymer in the covering portion 14.

続いて、本発明による吸水処理材の製造方法の一実施形態として、吸水処理材１の製造方法の一例を説明する。この製造方法は、芯部形成工程、第１の被覆部形成工程、及び第２の被覆部形成工程を含むものである。   Then, an example of the manufacturing method of the water absorption processing material 1 is demonstrated as one embodiment of the manufacturing method of the water absorption processing material by this invention. This manufacturing method includes a core forming step, a first covering portion forming step, and a second covering portion forming step.

芯部形成工程は、各粒状体１０を構成する芯部１２を形成する工程である。この工程においては、造粒装置を用いて芯部材料（芯部１２を構成する材料）を造粒することにより、複数の芯部１２を形成する。このとき、内径ｄ１（図４参照）が外径ｄ２の５０％以上となるように芯部１２を形成することが好ましく、内径ｄ１が外径ｄ２の７０％以上となるように芯部１２を形成することがより好ましい。造粒装置としては、例えば押出造粒機を用いることができる。造粒に先立って、芯部材料には、粉砕、混錬、加水等の前処理が必要に応じて行われる。   The core portion forming step is a step of forming the core portion 12 which constitutes each granular material 10. In this step, a plurality of core portions 12 are formed by granulating the core portion material (material constituting the core portion 12) using a granulating apparatus. At this time, the core portion 12 is preferably formed so that the inner diameter d1 (see FIG. 4) is 50% or more of the outer diameter d2, and the core portion 12 is 70% or more of the outer diameter d2 It is more preferable to form. As a granulation apparatus, an extrusion granulator can be used, for example. Prior to granulation, the core material is subjected to pretreatment such as pulverization, kneading, addition of water, etc. as necessary.

貫通孔１３は、芯部材料の造粒後に形成されてもよいし、芯部材料の造粒と同時に形成されてもよい。前者の場合、例えば、造粒された円柱状の造粒物に対し、その中心軸に沿って丸棒を突き刺すことにより、貫通孔１３を形成することができる。後者の場合、例えば、図５に示すダイス６０を用いて芯部材料を押出造粒することにより、貫通孔１３を形成することができる。   The through holes 13 may be formed after granulation of the core material, or may be formed simultaneously with granulation of the core material. In the former case, for example, the through hole 13 can be formed by piercing the round rod along the central axis of the granulated cylindrical granulated material. In the latter case, the through holes 13 can be formed, for example, by extrusion granulation of the core material using a die 60 shown in FIG.

図５は、ダイス６０を示す端面図である。ダイス６０には、芯部材料を通過させる複数のダイス孔６２が設けられている。ただし、同図においては、１つのダイス孔６２のみを示している。図６は、ダイス孔６２を示す平面図である。ダイス孔６２は、平面視で円形をしている。ダイス孔６２の内部には、芯材６４が設けられている。芯材６４は、ダイス孔６２の内面から離間した位置に設けられている。芯材６４は、丸棒状（円柱状）をしており、ダイス孔６２の中心軸に沿って延在している。芯材６４の中心軸は、ダイス孔６２の中心軸に一致する。   FIG. 5 is an end view showing the die 60. As shown in FIG. The die 60 is provided with a plurality of die holes 62 through which the core material passes. However, only one die hole 62 is shown in FIG. FIG. 6 is a plan view showing the die hole 62. As shown in FIG. The die hole 62 is circular in plan view. Inside the die hole 62, a core material 64 is provided. The core material 64 is provided at a position separated from the inner surface of the die hole 62. The core material 64 has a round bar shape (cylindrical shape) and extends along the central axis of the die hole 62. The central axis of the core material 64 coincides with the central axis of the die hole 62.

芯材６４は、連結部材６６を介してダイス孔６２に固定されている。連結部材６６は、ダイス孔６２の径方向に沿って、芯材６４からダイス孔６２の内面まで延在している。すなわち、連結部材６６の一端が芯材６４の側面に接続され、連結部材６６の他端がダイス孔６２の内面に接続されている。連結部材６６の幅ｗ１は、芯材６４の径よりも小さい。連結部材６６の幅ｗ１は、造粒時に芯材６４を支持しうる限り、できるだけ小さいことが好ましい。   The core material 64 is fixed to the die hole 62 via the connecting member 66. The connecting member 66 extends from the core material 64 to the inner surface of the die hole 62 along the radial direction of the die hole 62. That is, one end of the connecting member 66 is connected to the side surface of the core member 64, and the other end of the connecting member 66 is connected to the inner surface of the die hole 62. The width w 1 of the connecting member 66 is smaller than the diameter of the core material 64. The width w1 of the connecting member 66 is preferably as small as possible as long as the core 64 can be supported at the time of granulation.

図５からわかるように、芯材６４は、ダイス６０の厚み方向（同図の上下方向）について、ダイス孔６２の一部にのみ設けられている。芯材６４は、ダイス孔６２の出口側の開口面に達する一方で、ダイス孔６２の入口側の開口面には達していない。また、連結部材６６は、芯材６４の下端よりも上端寄りに位置している。連結部材６６の厚みｔ１は、芯材６４の長さよりも小さい。連結部材６６の厚みｔ１も、造粒時に芯材６４を支持しうる限り、できるだけ小さいことが好ましい。芯材６４及び連結部材６６の材料としては、例えば、金属又はプラスチックを用いることができる。   As can be seen from FIG. 5, the core material 64 is provided only in a part of the die hole 62 in the thickness direction of the die 60 (vertical direction in FIG. 5). The core material 64 reaches the opening surface on the outlet side of the die hole 62 but does not reach the opening surface on the inlet side of the die hole 62. The connecting member 66 is positioned closer to the upper end than the lower end of the core member 64. The thickness t1 of the connecting member 66 is smaller than the length of the core material 64. The thickness t1 of the connecting member 66 is also preferably as small as possible as long as the core 64 can be supported at the time of granulation. As materials of the core material 64 and the connecting member 66, for example, metal or plastic can be used.

ダイス６０を用いて芯部材料を押出造粒するとき、芯部材料は、ダイス孔６２の内部のうち芯材６４が設けられていない部分しか通過できない。このため、ダイス孔６２から押し出された芯部材料には、芯材６４の延長線上に延びる孔が形成される。かかる芯部材料を適当な長さで切断することにより、貫通孔１３を有する芯部１２が得られる。なお、芯部材料は、連結部材６６が設けられた部分も通過できないが、連結部材６６の幅ｗ１及び厚みｔ１は充分に小さいため、ダイス孔６２から押し出される芯部材料の形状に実質的な影響を与えない。   When the core material is extruded and granulated using the die 60, the core material can only pass through the inside of the die hole 62 where the core material 64 is not provided. For this reason, in the core material pushed out from the die hole 62, a hole extending on the extension of the core material 64 is formed. By cutting the core material to a suitable length, the core 12 having the through holes 13 is obtained. Although the core material can not pass through the portion where the connecting member 66 is provided, the width w1 and the thickness t1 of the connecting member 66 are sufficiently small, so the core material is substantially in the shape of the core material pushed out from the die hole 62. Not affect.

第１の被覆部形成工程は、芯部１２の外表面上に被覆部１４を形成する工程である。この工程においては、芯部１２の外表面に、接着性材料を含有する第１の被覆材料（被覆部１４を構成する材料）を付着させることにより、被覆部１４を形成する。本実施形態において第１の被覆材料は、接着性材料として吸水性ポリマーを含有している。第１の被覆材料の付着は、例えば、ノズルを用いて芯部１２の外表面に第１の被覆材料を吹き付けることにより行うことができる。   The first covering portion forming step is a step of forming the covering portion 14 on the outer surface of the core portion 12. In this step, the covering portion 14 is formed by adhering the first covering material (the material constituting the covering portion 14) containing the adhesive material on the outer surface of the core portion 12. In the present embodiment, the first coating material contains a water absorbing polymer as the adhesive material. The deposition of the first covering material can be performed, for example, by spraying the first covering material on the outer surface of the core 12 using a nozzle.

第２の被覆部形成工程は、貫通孔１３の内部に被覆部１６を形成する工程である。この工程においては、貫通孔１３の内面に、接着性材料を含有する第２の被覆材料（被覆部１６を構成する材料）を付着させることにより、被覆部１６を形成する。本実施形態において第２の被覆材料は、接着性材料として吸水性ポリマーを含有している。第２の被覆材料の付着は、例えば、ノズルを用いて貫通孔１３の内面に第２の被覆材料を吹き付けることにより行うことができる。   The second covering portion forming step is a step of forming the covering portion 16 inside the through hole 13. In this step, the covering portion 16 is formed by adhering a second covering material (material constituting the covering portion 16) containing an adhesive material on the inner surface of the through hole 13. In the present embodiment, the second coating material contains a water absorbing polymer as the adhesive material. The deposition of the second coating material can be performed, for example, by spraying the second coating material on the inner surface of the through hole 13 using a nozzle.

第１及び第２の被覆部形成工程を実行する順序は、任意である。すなわち、第１の被覆部形成工程を第２の被覆部形成工程より先に実行してもよいし、第２の被覆部形成工程を第１の被覆部形成工程より先に実行してもよい。また、第１及び第２の被覆部形成工程を同時に実行してもよい。   The order of performing the first and second coating forming steps is arbitrary. That is, the first covering portion forming step may be performed prior to the second covering portion forming step, and the second covering portion forming step may be performed prior to the first covering portion forming step. . Also, the first and second covering portion forming steps may be performed simultaneously.

第２の被覆部形成工程において被覆部１６は、被覆部１４と同一の組成の材料を用いて形成されてもよいし、被覆部１４と異なる組成の材料を用いて形成されてもよい。すなわち、第１及び第２の被覆材料は、同一の組成であってもよいし、相異なる組成であってもよい。前者の場合、第１及び第２の被覆部形成工程は、共通の材料を用いて同時に実行されることが好ましい。後者の場合、被覆部１６に占める吸水性ポリマーの重量割合が被覆部１４に占める吸水性ポリマーの重量割合よりも大きくなるように、被覆部１６を形成することが好ましい。   In the second covering portion forming step, the covering portion 16 may be formed using a material having the same composition as the covering portion 14 or may be formed using a material having a composition different from that of the covering portion 14. That is, the first and second coating materials may have the same composition or different compositions. In the former case, it is preferable that the first and second cover forming steps be performed simultaneously using a common material. In the latter case, it is preferable to form the covering portion 16 so that the weight proportion of the water absorbing polymer in the covering portion 16 is larger than the weight proportion of the water absorbing polymer in the covering portion 14.

第１及び第２の被覆部形成工程が実行された後、篩分け（分粒）、乾燥等の後処理が必要に応じて行われる。以上により、複数の粒状体１０からなる吸水処理材１が得られる。   After the first and second coating portion forming steps are performed, post treatments such as sieving (classification) and drying are performed as necessary. By the above, the water absorption processing material 1 which consists of a plurality of granular objects 10 is obtained.

本実施形態の効果を説明する。本実施形態においては、芯部１２が貫通孔１３を有している。そして、芯部１２の外表面上に被覆部１４が設けられるとともに、貫通孔１３の内部に被覆部１６が設けられている。この場合、芯部１２が貫通孔１３を有しない場合に比して、芯部１２における被覆部（被覆部１４，１６）が設けられる部分の表面積を大きくすることが可能である。これにより、使用済みの粒状体１０の固まり強度を高めることができる。したがって、使用済みの粒状体１０の固まり強度に優れた吸水処理材１、及びその製造方法が実現されている。   The effects of this embodiment will be described. In the present embodiment, the core 12 has a through hole 13. Then, the covering portion 14 is provided on the outer surface of the core portion 12, and the covering portion 16 is provided inside the through hole 13. In this case, as compared with the case where the core 12 does not have the through holes 13, it is possible to increase the surface area of the portion of the core 12 where the covering (coverings 14 and 16) is provided. This makes it possible to increase the mass strength of the used granular material 10. Therefore, the water absorption treatment material 1 excellent in the solid strength of the used granular material 10, and the manufacturing method thereof are realized.

被覆部１６は、貫通孔１３の内部の全体に設けられている。この場合、貫通孔１３の内部の一部にのみ被覆部１６を設ける場合に比して、被覆部１６の量を増やすことができる。このことは、使用済みの粒状体１０の固まり強度の向上に資する。   The covering portion 16 is provided on the entire inside of the through hole 13. In this case, the amount of the covering portion 16 can be increased as compared with the case where the covering portion 16 is provided only in a part of the inside of the through hole 13. This contributes to the improvement of the mass strength of the used granular material 10.

被覆部１６が被覆部１４と同一の組成の材料からなる場合、被覆部１４及び被覆部１６の材料（第１及び第２の被覆材料）として共通の材料を用いることが可能となる。このように共通の材料を用いた場合、芯部１２の表面の全体に当該材料を付着させることにより、被覆部１４及び被覆部１６を同時に形成することができる。   When the covering portion 16 is made of a material having the same composition as the covering portion 14, it is possible to use a common material as the material of the covering portion 14 and the covering portion 16 (first and second covering materials). When the common material is used in this manner, the covering portion 14 and the covering portion 16 can be simultaneously formed by adhering the material to the entire surface of the core portion 12.

被覆部１６が被覆部１４と異なる組成の材料からなる場合、各被覆部１４，１６の材料として、それぞれの役割に応じて最適な組成の材料を選択することができる。例えば、芯部１２の外表面上に位置する被覆部１４には、固まり形成機能を有することに加えて、液体を速やかに通過させて芯部１２に導くことが求められる。一方、貫通孔１３の内部に位置する被覆部１６には、専ら、固まり形成機能を有することが求められる。それゆえ、例えば、被覆部１４の材料としては、被覆部１６よりも吸水性・透水性に優れた組成の材料を用いるとともに、被覆部１６の材料としては、被覆部１４よりも接着性に優れた組成の材料を用いることが考えられる。   When the covering portion 16 is made of a material having a composition different from that of the covering portion 14, the material of the optimum composition can be selected as the material of each of the covering portions 14 and 16 according to the role thereof. For example, the covering portion 14 located on the outer surface of the core portion 12 is required to rapidly pass the liquid and lead it to the core portion 12 in addition to having a lump forming function. On the other hand, the covering portion 16 located inside the through hole 13 is required to have a lump forming function exclusively. Therefore, for example, as a material of the covering portion 14, a material having a composition that is more excellent in water absorption and water permeability than the covering portion 16 is used, and as a material of the covering portion 16, adhesion is better than the covering portion 14 It is conceivable to use materials of different composition.

本実施形態において被覆部１４及び被覆部１６は、接着性材料として吸水性ポリマーを含有している。吸水性ポリマーは、液体を吸収すると膨潤する性質を有する。膨潤した吸水性ポリマーは、液体が各被覆部１４，１６内を速やかに通過するのを妨げる。それゆえ、被覆部１６に占める吸水性ポリマーの重量割合を被覆部１４に占める吸水性ポリマーの重量割合よりも大きくした場合、被覆部１４の吸水性・透水性を高めるとともに、被覆部１６の接着性を高めることができる。   In the present embodiment, the covering portion 14 and the covering portion 16 contain a water absorbing polymer as an adhesive material. Water-absorbing polymers have the property of swelling when they absorb liquid. The swollen water absorbing polymer prevents the liquid from rapidly passing through each of the covering portions 14 and 16. Therefore, when the weight ratio of the water absorbing polymer in the covering portion 16 is made larger than the weight ratio of the water absorbing polymer in the covering portion 14, the water absorbency and water permeability of the covering portion 14 are enhanced and the adhesion of the covering portion 16 is Can be enhanced.

芯部１２は、略円筒状をしている。すなわち、芯部１２は、円柱の中心軸に沿って貫通孔１３が設けられた形状をしている。かかる形状の芯部１２は、押出造粒機を用いて形成するのに適している。押出造粒機を用いることにより、大量の芯部１２を短時間で形成することができる。   The core 12 has a substantially cylindrical shape. That is, the core portion 12 has a shape in which the through hole 13 is provided along the central axis of the cylinder. The core 12 of such shape is suitable for being formed using an extrusion granulator. By using an extrusion granulator, a large amount of core parts 12 can be formed in a short time.

芯部１２の内径を大きくすることにより、被覆部１６が設けられる貫通孔１３の内部空間を広く確保することができる。かかる観点から、芯部１２の内径は、芯部１２の外径の５０％以上であることが好ましく、７０％以上であることがより好ましい。他方、芯部１２の内径を大きくしすぎると、芯部１２の強度が不充分になるおそれがある。かかる観点から、芯部１２の内径は、芯部１２の外径の９０％以下であることが好ましい。   By increasing the inner diameter of the core portion 12, the internal space of the through hole 13 in which the covering portion 16 is provided can be widely secured. From this viewpoint, the inner diameter of the core portion 12 is preferably 50% or more of the outer diameter of the core portion 12, and more preferably 70% or more. On the other hand, if the inner diameter of the core 12 is too large, the strength of the core 12 may be insufficient. From this point of view, the inner diameter of the core 12 is preferably 90% or less of the outer diameter of the core 12.

芯部１２並びに被覆部１４及び被覆部１６が何れも有機物を主材料とする場合、焼却処分に適した粒状体１０を得ることができる。この場合、使用済みの粒状体１０の固まりを可燃ゴミとして捨てることができるため、ユーザにとっての利便性が向上する。   When the core portion 12 and the covering portion 14 and the covering portion 16 are mainly made of an organic substance, it is possible to obtain the granular body 10 suitable for incineration disposal. In this case, since the lump of used granular material 10 can be discarded as combustible dust, the convenience for the user is improved.

本発明は、上記実施形態に限定されるものではなく、様々な変形が可能である。上記実施形態においては、貫通孔１３の内部の全体に被覆部１６が設けられる場合を例示した。しかし、被覆部１６は、図７及び図８に示すように、貫通孔１３の内部の一部にのみ設けられてもよい。図８は、図７のVIII−VIII線に沿った断面図である。本例において被覆部１６は、貫通孔１３を塞がないように設けられている。すなわち、貫通孔１３の内部には、貫通孔１３の端から端まで連続する空洞Ｈ１が存在している。   The present invention is not limited to the above embodiment, and various modifications are possible. In the said embodiment, the case where the coating | coated part 16 was provided in the whole inside of the through-hole 13 was illustrated. However, as shown in FIGS. 7 and 8, the covering portion 16 may be provided only in a part of the inside of the through hole 13. FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. In the present example, the covering portion 16 is provided so as not to close the through hole 13. That is, in the inside of the through hole 13, a hollow H1 continuous from the end of the through hole 13 is present.

この場合、貫通孔１３の内部の全体に被覆部１６を設ける場合に比して、被覆部１６の材料（第２の被覆材料）の使用量を節約することができる。このことは、吸水処理材の製造コストの削減に資する。また、被覆部１６で貫通孔１３を塞がないようにすることにより、貫通孔１３内に液体の通り道を確保することができる。これにより、芯部１２の外表面だけでなく内表面からも液体を吸収しやすくなるため、粒状体１０の吸水速度を向上させることができる。   In this case, the amount of use of the material of the covering portion 16 (second covering material) can be saved as compared with the case where the covering portion 16 is provided on the entire inside of the through hole 13. This contributes to the reduction of the manufacturing cost of the water absorbing material. In addition, by making the covering portion 16 not block the through hole 13, it is possible to secure the passage of the liquid in the through hole 13. Thereby, the liquid can be easily absorbed not only from the outer surface of the core 12 but also from the inner surface, so that the water absorption speed of the granular material 10 can be improved.

上記実施形態においては、芯部１２が略円筒状をしている場合を例示した。しかし、芯部１２を貫通する貫通孔が設けられている限り、芯部１２の形状は、任意である。例えば、芯部１２は、球又は楕円体に貫通孔が設けられた形状をしていてもよい。   In the said embodiment, the case where the core part 12 was carrying out substantially cylindrical shape was illustrated. However, the shape of the core 12 is arbitrary as long as a through hole penetrating the core 12 is provided. For example, the core portion 12 may have a shape in which a through hole is provided in a sphere or an ellipsoid.

１ 吸水処理材
１０ 粒状体
１２ 芯部
１３ 貫通孔
１４ 被覆部（第１の被覆部）
１６ 被覆部（第２の被覆部）
６０ ダイス
６２ ダイス孔
６４ 芯材
６６ 連結部材 DESCRIPTION OF SYMBOLS 1 Water absorption processing material 10 Granule 12 Core part 13 Through-hole 14 Cover part (1st cover part)
16 Cover (second cover)
60 dice 62 die hole 64 core 66 connecting member

Claims (25)

複数の粒状体からなる吸水処理材であって、
前記各粒状体は、
貫通孔を有する粒状の芯部と、
接着性材料を含有し、前記芯部の外表面上に設けられた第１の被覆部と、
接着性材料を含有し、前記貫通孔の内部に設けられた第２の被覆部と、
を備えることを特徴とする吸水処理材。 It is a water absorption treatment material consisting of a plurality of particles,
Each granular body is
Granular core having through holes,
A first covering comprising an adhesive material and provided on the outer surface of said core,
A second covering portion containing an adhesive material and provided inside the through hole;
A water absorption treatment material characterized by comprising: 請求項１に記載の吸水処理材において、
前記第２の被覆部は、前記貫通孔の前記内部の一部にのみ設けられている吸水処理材。 In the water absorption treatment material according to claim 1,
The second coated portion is a water absorption treated material provided only in a part of the inside of the through hole. 請求項２に記載の吸水処理材において、
前記第２の被覆部は、前記貫通孔を塞がないように設けられている吸水処理材。 In the water absorption treatment material according to claim 2,
The second coated portion is a water absorption treated material provided so as not to block the through hole. 請求項１に記載の吸水処理材において、
前記第２の被覆部は、前記貫通孔の前記内部の全体に設けられている吸水処理材。 In the water absorption treatment material according to claim 1,
The second coated portion is a water absorption treatment material provided on the entire inside of the through hole. 請求項１乃至４の何れかに記載の吸水処理材において、
前記第２の被覆部は、前記第１の被覆部と異なる組成の材料からなる吸水処理材。 In the water absorption treatment material according to any one of claims 1 to 4,
The water absorption treatment material, wherein the second covering portion is made of a material different in composition from the first covering portion. 請求項５に記載の吸水処理材において、
前記第１及び第２の被覆部は、前記接着性材料として吸水性ポリマーを含有する吸水処理材。 In the water absorption treatment material according to claim 5,
The first and second covering portions are a water absorption treated material containing a water absorbing polymer as the adhesive material. 請求項６に記載の吸水処理材において、
前記第２の被覆部に占める前記吸水性ポリマーの重量割合は、前記第１の被覆部に占める前記吸水性ポリマーの重量割合よりも大きい吸水処理材。 In the water absorption treatment material according to claim 6,
A water absorption treated material, wherein a weight ratio of the water absorbing polymer in the second covering portion is larger than a weight ratio of the water absorbing polymer in the first covering portion. 請求項１乃至４の何れかに記載の吸水処理材において、
前記第２の被覆部は、前記第１の被覆部と同一の組成の材料からなる吸水処理材。 In the water absorption treatment material according to any one of claims 1 to 4,
The water absorption treatment material, wherein the second covering portion is made of a material having the same composition as the first covering portion. 請求項１乃至８の何れかに記載の吸水処理材において、
前記芯部は、略円筒状をしている吸水処理材。 The water absorption treatment material according to any one of claims 1 to 8.
The said core part is a water absorption processing material which is carrying out the substantially cylindrical shape. 請求項９に記載の吸水処理材において、
前記芯部の内径は、当該芯部の外径の５０％以上である吸水処理材。 In the water absorption treatment material according to claim 9,
A water absorbing treatment material, wherein the inner diameter of the core portion is 50% or more of the outer diameter of the core portion. 請求項１０に記載の吸水処理材において、
前記芯部の内径は、当該芯部の外径の７０％以上である吸水処理材。 In the water absorption treatment material according to claim 10,
A water absorption treatment material, wherein the inner diameter of the core portion is 70% or more of the outer diameter of the core portion. 請求項１乃至１１の何れかに記載の吸水処理材において、
前記芯部並びに前記第１及び第２の被覆部は、何れも有機物を主材料とする吸水処理材。 In the water absorption treatment material according to any one of claims 1 to 11,
The core part and the first and second covering parts are both made of an organic substance as a main material. 複数の粒状体からなる吸水処理材を製造する方法であって、
前記各粒状体を構成し、貫通孔を有する粒状の芯部を形成する芯部形成工程と、
前記芯部の外表面上に、接着性材料を含有する第１の被覆部を形成する第１の被覆部形成工程と、
前記貫通孔の内部に、接着性材料を含有する第２の被覆部を形成する第２の被覆部形成工程と、
を含むことを特徴とする吸水処理材の製造方法。 A method of producing a water absorption treatment material comprising a plurality of particles, the method comprising
A core forming step of forming each of the granular bodies and forming a granular core having a through hole;
A first covering portion forming step of forming a first covering portion containing an adhesive material on the outer surface of the core portion;
A second covering portion forming step of forming a second covering portion containing an adhesive material inside the through hole;
A method of manufacturing a water absorption treated material, comprising: 請求項１３に記載の吸水処理材の製造方法において、
前記第２の被覆部形成工程においては、前記貫通孔の前記内部の一部にのみ前記第２の被覆部を形成する吸水処理材の製造方法。 In the method of manufacturing a water absorption treatment material according to claim 13,
In the second covering portion forming step, a method of manufacturing a water absorption treated material, in which the second covering portion is formed only on a part of the inside of the through hole. 請求項１４に記載の吸水処理材の製造方法において、
前記第２の被覆部形成工程においては、前記貫通孔を塞がないように前記第２の被覆部を形成する吸水処理材の製造方法。 In the method of manufacturing a water absorption treatment material according to claim 14,
The manufacturing method of the water absorption processing material which forms the said 2nd coating | coated part so that the said through-hole may not be blocked in a said 2nd coating | coated part formation process. 請求項１３に記載の吸水処理材の製造方法において、
前記第２の被覆部形成工程においては、前記貫通孔の前記内部の全体に前記第２の被覆部を形成する吸水処理材の製造方法。 In the method of manufacturing a water absorption treatment material according to claim 13,
In the second covering portion forming step, a method of manufacturing a water absorption treated material, in which the second covering portion is formed on the whole inside of the through hole. 請求項１３乃至１６の何れかに記載の吸水処理材の製造方法において、
前記第２の被覆部形成工程においては、前記第１の被覆部と異なる組成の材料を用いて、前記第２の被覆部を形成する吸水処理材の製造方法。 In the method of manufacturing a water absorption treatment material according to any one of claims 13 to 16,
The manufacturing method of the water absorption processing material which forms said 2nd coating | coated part using the material of a composition different from a said 1st coating | coated part in a said 2nd coating | coated part formation process. 請求項１７に記載の吸水処理材の製造方法において、
前記第１及び第２の被覆部形成工程においては、それぞれ、前記接着性材料として吸水性ポリマーを含有する前記第１及び第２の被覆部を形成する吸水処理材の製造方法。 In the method of manufacturing a water absorption treatment material according to claim 17,
The manufacturing method of the water absorption processing material which forms said 1st and 2nd coating | coated part which contains a water absorbing polymer as said adhesive material, respectively in said 1st and 2nd coating | coated part formation process. 請求項１８に記載の吸水処理材の製造方法において、
前記第２の被覆部形成工程においては、前記第２の被覆部に占める前記吸水性ポリマーの重量割合が前記第１の被覆部に占める前記吸水性ポリマーの重量割合よりも大きくなるように、前記第２の被覆部を形成する吸水処理材の製造方法。 In the method of manufacturing a water absorption treatment material according to claim 18,
In the second covering portion forming step, the weight ratio of the water absorbing polymer in the second covering portion is larger than the weight ratio of the water absorbing polymer in the first covering portion. The manufacturing method of the water absorption processing material which forms a 2nd coating | coated part. 請求項１３乃至１６の何れかに記載の吸水処理材の製造方法において、
前記第２の被覆部形成工程においては、前記第１の被覆部と同一の組成の材料を用いて、前記第２の被覆部を形成する吸水処理材の製造方法。 In the method of manufacturing a water absorption treatment material according to any one of claims 13 to 16,
The manufacturing method of the water absorption processing material which forms said 2nd coating | coated part using the material of the same composition as said 1st coating | coated part in a said 2nd coating | coated part formation process. 請求項２０に記載の吸水処理材の製造方法において、
前記第１及び第２の被覆部形成工程は、共通の材料を用いて同時に実行される吸水処理材の製造方法。 In the method of manufacturing a water absorption treatment material according to claim 20,
The method of manufacturing a water absorption treated material, wherein the first and second coating portion forming steps are simultaneously performed using a common material. 請求項１３乃至２１の何れかに記載の吸水処理材の製造方法において、
前記芯部形成工程においては、略円筒状の前記芯部を形成する吸水処理材の製造方法。 In the method of manufacturing a water absorption treated material according to any one of claims 13 to 21,
In the core portion forming step, a method of manufacturing a water absorption treated material for forming the substantially cylindrical core portion. 請求項２２に記載の吸水処理材の製造方法において、
前記芯部形成工程においては、前記芯部の内径が当該芯部の外径の５０％以上となるように、前記芯部を形成する吸水処理材の製造方法。 In the method of manufacturing a water absorption treatment material according to claim 22,
In the core forming step, a method of manufacturing a water absorption treated material, wherein the core is formed such that the inner diameter of the core is 50% or more of the outer diameter of the core. 請求項２３に記載の吸水処理材の製造方法において、
前記芯部形成工程においては、前記芯部の内径が当該芯部の外径の７０％以上となるように、前記芯部を形成する吸水処理材の製造方法。 In the method of manufacturing a water absorption treatment material according to claim 23,
In the core forming step, a method of manufacturing a water absorption treated material, wherein the core is formed such that the inner diameter of the core is 70% or more of the outer diameter of the core. 請求項１３乃至２４の何れかに記載の吸水処理材の製造方法において、
前記芯部形成工程においては、有機物を主材料とする前記芯部を形成し、
前記第１及び第２の被覆部形成工程においては、それぞれ、有機物を主材料とする前記第１及び第２の被覆部を形成する吸水処理材の製造方法。 In the method of manufacturing a water absorption treated material according to any one of claims 13 to 24,
In the core forming step, the core having an organic substance as a main material is formed,
The manufacturing method of the water absorption processing material which forms the said 1st and 2nd coating | coated part which makes an organic substance a main material in the said 1st and 2nd coating | coated part formation process, respectively.
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