JPH09315877A - Production of clay porous body - Google Patents
Production of clay porous bodyInfo
- Publication number
- JPH09315877A JPH09315877A JP13661296A JP13661296A JPH09315877A JP H09315877 A JPH09315877 A JP H09315877A JP 13661296 A JP13661296 A JP 13661296A JP 13661296 A JP13661296 A JP 13661296A JP H09315877 A JPH09315877 A JP H09315877A
- Authority
- JP
- Japan
- Prior art keywords
- clay
- porous body
- matter
- freeze
- drying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は粘土を主成分とした
均質、かつ、高強度の多孔体の製造方法に関する。TECHNICAL FIELD The present invention relates to a method for producing a homogeneous and high-strength porous body containing clay as a main component.
【０００２】[0002]
【従来の技術】多孔質の材料としては、いわゆる発泡ス
チロール（ポリスチレン）あるいはスチレンペーパー
が、断熱材、吸音材として軽量で適当な強度があり安価
であるがゆえに広く普及している。しかし、その原料は
石油であり、使用後の焼却に際しては高熱を出して焼却
炉を破損し、大量の炭酸ガスを発生するなど、環境汚染
の典型といえる材料である。また、発泡スチロール等が
放置されて河川や海を汚染するなど、社会問題として指
摘されて久しく、ポリスチレン製の断熱材、吸音材を代
替しうる環境に親和的な素材の出現が待たれているのが
実状である。このような要求に応えるものとして、粘土
を用いた多孔体材料が提案されている（特開昭６３−２
３０５８１号）。これは、粘土と水との混合物を高速で
凍結乾燥して多孔体とするものであるが、主として液体
窒素を用いて混合物を冷却している。2. Description of the Related Art As a porous material, so-called styrofoam (polystyrene) or styrene paper is widely used because it is lightweight, has appropriate strength and is inexpensive as a heat insulating material and sound absorbing material. However, its raw material is petroleum, and when incinerated after use, it emits high heat, damages the incinerator, and produces a large amount of carbon dioxide gas. In addition, it has been pointed out as a social problem that styrofoam, etc. is left undisturbed and pollutes rivers and the sea, and for a long time the appearance of environmentally friendly materials that can replace polystyrene heat insulating materials and sound absorbing materials is awaited. Is the actual situation. In order to meet such demands, a porous material using clay has been proposed (JP-A-63-2).
30581). In this method, a mixture of clay and water is freeze-dried at a high speed to form a porous body, and the mixture is cooled mainly by using liquid nitrogen.
【０００３】[0003]
【発明が解決しようとする課題】しかし、この従来の、
粘土多孔体の製造方法においては、粘土をより高濃度で
分散させて凍結乾燥しようとすると、分散液中の粘土粒
子が凝集して分散が不均一となり（いわゆるママコを形
成する）、気泡が混入し、最終的に十分な強度の均質多
孔体が得られないという問題があった。したがって本発
明の目的は、均質、かつ、高強度の粘土多孔体の製造方
法を提供することである。However, this conventional method,
In the method for producing a clay porous body, when clay is dispersed at a higher concentration and then freeze-dried, the clay particles in the dispersion aggregate to cause uneven dispersion (forming so-called Mamako), and bubbles are mixed. However, there is a problem that a homogeneous porous body having a sufficient strength cannot be finally obtained. Therefore, an object of the present invention is to provide a method for producing a homogeneous and high-strength clay porous body.
【０００４】[0004]
【課題を解決するための手段】本発明者はこのような水
性粘土分散体を用いる、従来の多孔体の製造方法の欠点
を克服するため鋭意研究を重ねた結果、低濃度に分散さ
せた粘土を加熱して濃縮することにより、均質で分散性
の良好な粘土を主成分とする水分散体（濃縮化物）が得
られ、この濃縮化物を用いて、急速凍結、凍結乾燥させ
ることで均質、かつ、高強度の多孔体を得ることができ
ることを見い出し、この知見に基づき本発明をなすに至
った。すなわち本発明は、（１）粘土を含有する水性分
散液を加熱濃縮し、得られた水性濃縮化物を急速凍結後
凍結乾燥することを特徴とする粘土多孔体の製造方法、
（２）水性濃縮化物の固形分含有率が６０重量％以下で
あることを特徴とする（１）項記載の粘土多孔体の製造
方法、及び（３）低濃度に分散させた粘土に、繊維、着
色料、抗菌剤、消臭剤および／または香料を混合させて
なる水性分散液を用いることを特徴とする（１）又は
（２）項記載の粘土多孔体の製造方法を提供するもので
ある。The present inventor has conducted extensive studies to overcome the drawbacks of the conventional method for producing a porous body using such an aqueous clay dispersion, and as a result, the clay dispersed in a low concentration has been obtained. By heating and concentrating, an aqueous dispersion (condensate) containing clay that is homogeneous and has good dispersibility as a main component is obtained, and using this concentrate, it is homogenized by rapid freezing and freeze-drying. Moreover, they have found that a high-strength porous body can be obtained, and have completed the present invention based on this finding. That is, the present invention provides (1) a method for producing a clay porous body, which comprises heating and concentrating an aqueous dispersion containing clay, and rapidly freeze-drying the resulting aqueous concentrate, followed by freeze-drying.
(2) The solid content of the aqueous concentrate is 60% by weight or less, (1) The method for producing a clay porous body according to the item (3), and (3) the clay dispersed in a low concentration, the fiber A method for producing a clay porous body according to item (1) or (2), characterized in that an aqueous dispersion obtained by mixing a pigment, a coloring agent, an antibacterial agent, a deodorant and / or a fragrance is used. is there.
【０００５】[0005]
【発明の実施の形態】本発明で用いられる粘土は、天然
でも合成であってもよく、鉱物分類上粘土鉱物に属する
ものを主成分としているものが特に制限なく用いられ
る。天然のものとしては例えば、モンモリロナイト、バ
イデライト、サポナイトなどのスメクタイトやカオリナ
イト、アロフェン等、あるいはスメクタイトを主成分と
するベントナイトや酸性白土等があり、これらは化学的
に修飾、変化させて、いわゆる合成粘土としても用いる
ことができる。これらのうちで、好ましくはスメクタイ
ト、ベントナイト、酸性白土が用いられ、ベントナイ
ト、酸性白土は精製したものが特に好ましく用いられ
る。BEST MODE FOR CARRYING OUT THE INVENTION The clay used in the present invention may be natural or synthetic, and those having as a main component those belonging to clay minerals in terms of mineral classification are used without particular limitation. Examples of natural substances include smectites such as montmorillonite, beidellite, and saponite, kaolinite, allophane, etc., or bentonite and acid clay having smectite as a main component, which are chemically modified and changed to obtain so-called synthetic materials. It can also be used as clay. Of these, smectite, bentonite, and acid clay are preferably used, and bentonite and acid clay are preferably purified ones.
【０００６】本発明において用いられる、粘土の水性分
散液とは、粘土の微粒子が、水を主体とする分散液中に
微細に均一分散したゾル液などをいう。この粘土の水性
分散液には、多孔体の軽量、多孔の性質を損なわない範
囲であれば、必要に応じて粘土以外の成分を添加でき
る。例えば、圧縮強度や耐熱性などの向上の目的で、繊
維、水ガラス、ゼラチン、多糖類など、あるいは着色
料、香料、抗菌剤、消臭剤、乾燥剤なども配合できる。
このときの水性分散液の粘土成分の含有量は通常０．５
〜５０重量％、好ましくは１〜４０重量％、さらに好ま
しくは３〜２０重量％である。また、水性分散液中に、
前記の繊維、着色料などをさらに含有させる場合は、こ
れらと粘土成分との合計の固形分含有量が、水性分散液
中に、通常５９重量％以下、好ましくは５〜５０重量％
とする。The aqueous clay dispersion used in the present invention means a sol liquid in which fine particles of clay are finely and uniformly dispersed in a dispersion mainly composed of water. If necessary, components other than clay can be added to the aqueous dispersion of clay as long as the weight and porosity of the porous body are not impaired. For example, fibers, water glass, gelatin, polysaccharides, etc., or coloring agents, fragrances, antibacterial agents, deodorants, desiccants, etc. may be added for the purpose of improving the compressive strength and heat resistance.
The content of the clay component in the aqueous dispersion at this time is usually 0.5.
-50% by weight, preferably 1-40% by weight, more preferably 3-20% by weight. Also, in the aqueous dispersion,
When the above fibers and colorants are further contained, the total solid content of these and the clay component is usually 59% by weight or less, preferably 5 to 50% by weight in the aqueous dispersion.
And
【０００７】本発明は低濃度に分散させた粘土を攪拌し
ながら粘土が脱水しない温度、通常１００℃以下、好ま
しくは８０〜１００℃の範囲で加熱して濃縮することに
より、均質で分散性の良好な粘土を主成分とする水性濃
縮化物が得られ、この水性濃縮化物を用いることで高強
度の均質多孔体を得ることができる。この場合の粘土の
水性分散液の濃縮度は、特に制限はないが、濃縮処理前
の分散液に対し粘土の含有量を、通常１重量％以上高
く、好ましくは３〜５０重量％、より好ましくは５〜３
０重量％、上昇させるものとする。このようにして濃縮
して得られた水性濃縮化物の固形分含有量は特に制限は
ないが、好ましくは６０重量％以下、より好ましくは８
〜５０重量％である。According to the present invention, the clay dispersed at a low concentration is stirred and heated at a temperature at which the clay does not dehydrate, usually at a temperature of 100 ° C. or lower, preferably in the range of 80 to 100 ° C. to concentrate the clay to obtain a homogeneous and dispersible material. An aqueous concentrate containing good clay as a main component is obtained, and by using this aqueous concentrate, a high-strength homogeneous porous body can be obtained. The concentration of the aqueous dispersion of clay in this case is not particularly limited, but the content of clay is usually 1% by weight or more higher than that of the dispersion before the concentration treatment, preferably 3 to 50% by weight, more preferably Is 5 to 3
It shall be increased by 0% by weight. The solid content of the aqueous concentrate thus obtained by concentration is not particularly limited, but is preferably 60% by weight or less, more preferably 8% by weight or less.
~ 50% by weight.
【０００８】このようにして得た粘土を含有する水性濃
縮化物を、所定形状に成形し凍結乾燥する。凍結の方法
は特に制限はなく、容器に入れた水性濃縮化物を液体窒
素で急速凍結する方法や、冷却した型の表面に水性濃縮
化物を塗装し、これを同様に急速凍結する方法などがあ
げられる。塗装する型については成形後に多孔体を取り
外せるものであれば素材、形状等に特に制限はない。塗
装はスプレーなど、通常の手段によって行うことができ
る。このとき、好ましくは厚さ１０ｍｍ以下、さらに好
ましくは１〜５ｍｍとなるよう型に塗装する。なお、型
を用いる場合は、これを冷凍雰囲気下に置くなどしてあ
らかじめ冷凍しておくのが好ましい。The aqueous concentrate containing clay thus obtained is molded into a predetermined shape and freeze-dried. The freezing method is not particularly limited, and examples include a method of rapidly freezing the aqueous concentrate in a container with liquid nitrogen, and a method of coating the aqueous concentrate on the surface of a cooled mold and similarly freezing it. To be There are no particular restrictions on the material, shape, etc. of the mold to be coated as long as the porous body can be removed after molding. The coating can be performed by a usual means such as spraying. At this time, the mold is coated so that the thickness is preferably 10 mm or less, more preferably 1 to 5 mm. When a mold is used, it is preferably frozen in advance by placing it in a freezing atmosphere.
【０００９】本発明においては水性濃縮化物を成形後、
ただちに急速凍結し、次いで凍結乾燥することにより、
目的の多孔体を得る。本発明における急速凍結は、１×
１０-3ｍｌ／秒以上が好ましく、１×１０-2ｍｌ／秒以
上がより好ましい。この凍結速度とは、１秒間に凍結す
る水性濃縮化物の容積で示す。この速度が低すぎる場
合、空孔の大きさや形状が不揃いになり、圧縮強度など
が悪くなる。凍結は、液体窒素、冷凍機など、通常の手
段で行うことができる。In the present invention, after molding the aqueous concentrate,
Immediate quick freezing, followed by freeze drying,
The desired porous body is obtained. The quick freezing in the present invention is 1 ×
It is preferably 10 −3 ml / sec or more, more preferably 1 × 10 −2 ml / sec or more. The freezing rate is indicated by the volume of the aqueous concentrate that freezes in 1 second. If this speed is too low, the size and shape of the pores become uneven, resulting in poor compressive strength and the like. Freezing can be performed by a usual means such as liquid nitrogen or a refrigerator.
【００１０】本発明においては、このように凍結したも
のを、次いで凍結乾燥する。通常、凍結乾燥は減圧下で
行われるが、減圧しないで送風下で乾燥してもよい。凍
結乾燥自体は常法に従って行うことができる。In the present invention, the thus frozen product is then freeze-dried. Usually, freeze-drying is carried out under reduced pressure, but it may be dried under ventilation without reducing pressure. Freeze-drying itself can be performed according to a conventional method.
【００１１】[0011]
【実施例】次に、本発明を実施例に基づきさらに詳細に
説明する。なお、例中の濃度を表わす％は重量％を示
す。 実施例１ 山形県左沢産の天然ベントナイトを水簸し、不純物を取
り除いた固形分濃度約３％の粘土ゾルをつくり、攪拌し
ながらサンドバスで１００℃に加熱して固形分濃度約１
０％に濃縮した。この粘土ゾルをステンレス製の容器に
取り、同容器を液体窒素を用いて急速凍結し、凍結体を
真空乾燥した。得られた多孔体は見掛け比重０．１０と
軽く、圧縮強度を測定したところ、約４．０ｋｇ／ｃｍ
2 と市販の発泡ポリスチレンとほぼ同等の圧縮強度を示
した。EXAMPLES Next, the present invention will be described in more detail based on examples. In the examples,% representing the concentration means% by weight. Example 1 Natural bentonite from Sazawa, Yamagata Prefecture was elutriated to form a clay sol having a solid content concentration of about 3% from which impurities were removed, and heated to 100 ° C. with a sand bath while stirring to obtain a solid content concentration of about 1%.
Concentrated to 0%. The clay sol was placed in a stainless steel container, the container was rapidly frozen using liquid nitrogen, and the frozen body was vacuum dried. The obtained porous body was light with an apparent specific gravity of 0.10, and its compressive strength was measured to be about 4.0 kg / cm.
2 showed compressive strength almost equal to that of commercially available expanded polystyrene.
【００１２】比較例１ 山形県左沢産の天然ベントナイトを水簸し、２μｍ以下
の鉱物粒のみを集めて、モンモリロナイト成分を濃縮
し、塩化ナトリウム水溶液を用いてモンモリロナイトの
層間イオンをＮａ+ に置換し、水洗、風乾して原料とし
た。同原料と水を計量、混合して固形分濃度１０％の粘
土ゾルをつくり、一昼夜放置して熟成した。同ゾルをス
テンレス製の容器に取り、同容器を液体窒素に浸潤し
て、平均凍結速度１×１０-2ｍｌ／秒以上で急速凍結
し、凍結体を真空乾燥して、多孔体を作成した。得られ
た多孔体は見掛け比重０．１０と軽いが、圧縮強度を測
定したところ、約１．２ｋｇ／ｃｍ2 と市販の発泡ポリ
スチレンの圧縮強度には全く及ばなかった。Comparative Example 1 Natural bentonite from Sazawa, Yamagata Prefecture was elutriated, and only mineral particles of 2 μm or less were collected, the montmorillonite component was concentrated, and the interlayer ion of montmorillonite was replaced with Na + using an aqueous sodium chloride solution. It was washed with water, air dried and used as the raw material. The same raw material and water were weighed and mixed to prepare a clay sol having a solid content concentration of 10%, and the mixture was left to stand overnight for aging. The sol was taken in a stainless steel container, and the container was infiltrated with liquid nitrogen and rapidly frozen at an average freezing rate of 1 × 10 -2 ml / sec or more, and the frozen body was vacuum dried to form a porous body. . The resulting porous body had an apparent specific gravity of 0.10, which was light, but the compression strength was measured to be about 1.2 kg / cm 2 , which was far below the compression strength of commercially available expanded polystyrene.
【００１３】実施例２ 実施例１と同じ方法で固形分濃度約２５％に濃縮した粘
土ゾルを作り、この粘土ゾルをステンレス製の容器に取
り、同容器を液体窒素を用いて急速凍結し、凍結体を真
空乾燥した。得られた多孔体は見掛け比重０．３０と軽
く、圧縮強度を測定したところ、約２０．０ｋｇ／ｃｍ
2 と市販の発泡ポリスチレンをはるかに凌駕する圧縮強
度を示した。Example 2 A clay sol concentrated to a solid concentration of about 25% was prepared in the same manner as in Example 1, the clay sol was placed in a stainless steel container, and the container was rapidly frozen using liquid nitrogen. The frozen body was vacuum dried. The obtained porous body was light with an apparent specific gravity of 0.30, and the compression strength was measured to be about 20.0 kg / cm.
2 and a compressive strength far superior to that of commercially available expanded polystyrene.
【００１４】比較例２ 比較例１と同じ方法で固形分濃度２５％の粘土ゾルを作
り、一昼夜放置して熟成した。同ゾルをステンレス製の
容器に取り、同容器を液体窒素に浸潤して、平均凍結速
度１×１０-2ｍｌ／秒以上で急速凍結し、凍結体を真空
乾燥して、多孔体を作成した。容器より取り出したとこ
ろ、多数の気泡の混入があり均質な試料が得られなかっ
た。Comparative Example 2 A clay sol having a solid content concentration of 25% was prepared in the same manner as in Comparative Example 1, and left standing for a whole day and night for aging. The sol was taken in a stainless steel container, and the container was infiltrated with liquid nitrogen and rapidly frozen at an average freezing rate of 1 × 10 -2 ml / sec or more, and the frozen body was vacuum dried to form a porous body. . When taken out from the container, many air bubbles were mixed, and a homogeneous sample could not be obtained.
【００１５】実施例３ 山形県左沢産の天然ベントナイトを水簸し、２μｍ以下
の鉱物粒のみを集めて、モンモリロナイト成分を濃縮
し、塩化ナトリウム水溶液を用いてモンモリロナイトの
層間イオンをＮａ+ に置換し、水洗、風乾して原料とし
た。同原料と水を計量、混合して固形分濃度１０％の粘
土ゾルをつくり、攪拌しながらサンドバスで１００℃に
加熱して固形分濃度約１５％に濃縮した。この粘土ゾル
をステンレス製の容器に取り、同容器を液体窒素を用い
て急速凍結し、凍結体を真空乾燥した。得られた多孔体
は見掛け比重０．１８と軽く、圧縮強度を測定したとこ
ろ、約１１．０ｋｇ／ｃｍ2 と市販の発泡ポリスチレン
をはるかに凌駕する圧縮強度を示した。Example 3 Natural bentonite from Sazawa, Yamagata Prefecture was elutriated, only mineral particles of 2 μm or less were collected, the montmorillonite component was concentrated, and the interlayer ion of montmorillonite was replaced with Na + using an aqueous sodium chloride solution. It was washed with water, air dried and used as the raw material. The same raw material and water were weighed and mixed to form a clay sol having a solid content concentration of 10%, which was heated with stirring in a sand bath at 100 ° C. to be concentrated to a solid content concentration of about 15%. The clay sol was placed in a stainless steel container, the container was rapidly frozen using liquid nitrogen, and the frozen body was vacuum dried. The obtained porous body had an apparent specific gravity of 0.18 and was light, and the compression strength was measured to be about 11.0 kg / cm 2, which was far superior to that of commercially available expanded polystyrene.
【００１６】比較例３ 比較例１と同じ方法で固形分濃度１５％の粘土ゾルを作
り、一昼夜放置して熟成した。同ゾルをステンレス製の
容器に取り、同容器を液体窒素に浸潤して、平均凍結速
度１×１０-2ｍｌ／秒以上で急速凍結し、凍結体を真空
乾燥して、多孔体を作成した。得られた多孔体は見掛け
比重０．１８と軽いが、圧縮強度を測定したところ、約
５．０ｋｇ／ｃｍ2 と実施例３の多孔体の圧縮強度には
到底及ばなかった。Comparative Example 3 A clay sol having a solid content concentration of 15% was prepared in the same manner as in Comparative Example 1, and left standing for a whole day and night for aging. The sol was taken in a stainless steel container, and the container was infiltrated with liquid nitrogen and rapidly frozen at an average freezing rate of 1 × 10 -2 ml / sec or more, and the frozen body was vacuum dried to form a porous body. . The obtained porous body had an apparent specific gravity of 0.18, which was light, but the compression strength was about 5.0 kg / cm 2 , which was far below the compressive strength of the porous body of Example 3.
【００１７】実施例４ 山形県左沢産の天然ベントナイトを水簸し、不純物を取
り除いた固形分濃度約３％の粘土ゾルをつくり、攪拌し
ながらサンドバスで８０℃に加熱して固形分濃度約１０
％に濃縮した。この粘土ゾルをステンレス製の容器に取
り、同容器を液体窒素を用いて急速凍結し、凍結体を真
空乾燥した。得られた多孔体は見掛け比重０．１０と軽
く、圧縮強度を測定したところ、約４．０ｋｇ／ｃｍ2
と市販の発泡ポリスチレンとほぼ同等の圧縮強度を示し
た。Example 4 A natural bentonite from Sazawa, Yamagata Prefecture was elutriated to prepare a clay sol having a solid content concentration of about 3% from which impurities were removed, and heated to 80 ° C. with a sand bath while stirring to obtain a solid content concentration of about 3. 10
Concentrated to%. The clay sol was placed in a stainless steel container, the container was rapidly frozen using liquid nitrogen, and the frozen body was vacuum dried. The obtained porous body was light with an apparent specific gravity of 0.10, and its compressive strength was measured to be about 4.0 kg / cm 2.
And showed almost the same compressive strength as the commercially available expanded polystyrene.
【００１８】実施例５ 山形県左沢産の天然ベントナイトを水簸し、不純物を取
り除いた固形分濃度約３％の粘土ゾルをつくり、紙パル
プを１％添加した後、攪拌しながらサンドバスで８０℃
に加熱して固形分濃度約１０％に濃縮した。この粘土ゾ
ルをステンレス製の容器に取り、同容器を液体窒素を用
いて急速凍結し、凍結体を真空乾燥した。得られた多孔
体は見掛け比重０．０９と軽く、圧縮強度を測定したと
ころ、約４．５ｋｇ／ｃｍ2 と市販の発泡ポリスチレン
とほぼ同等の圧縮強度を示した。Example 5 A natural bentonite from Sazawa, Yamagata Prefecture was elutriated to form a clay sol having a solid content concentration of about 3% from which impurities were removed, and 1% of paper pulp was added thereto. ℃
The mixture was heated to a solid content concentration of about 10%. The clay sol was placed in a stainless steel container, the container was rapidly frozen using liquid nitrogen, and the frozen body was vacuum dried. The resulting porous body was light with an apparent specific gravity of 0.09, and its compressive strength was measured to be about 4.5 kg / cm 2 , which was almost the same as that of commercially available expanded polystyrene.
【００１９】実施例６ 加熱濃縮後の到達固形分濃度を変えた以外は実施例１と
全く同様にして多孔体を製造し、その多孔体の圧縮強度
を測定した。得られた結果を固形分濃度と圧縮強度の関
係として、図１に示した。Example 6 A porous body was produced in exactly the same manner as in Example 1 except that the ultimate solid content concentration after heating and concentration was changed, and the compressive strength of the porous body was measured. The obtained results are shown in FIG. 1 as the relationship between the solid content concentration and the compressive strength.
【００２０】[0020]
【発明の効果】本発明方法によれば、急速凍結に付され
る水性粘土分散体は高濃度においても、粘土の分散性が
極めて良好で、気泡の混入が防止されており、これを急
速凍結後凍結乾燥して、均質、かつ、高強度の多孔体を
得ることができる。特に本発明によれば、同濃度の水性
粘土分散体を用いる従来方法よりも、製品強度が優れる
多孔体を得ることができ、より低比重で、より高強度の
多孔体を製造することができるという優れた作用効果を
奏する。本発明により得られる粘土多孔体は緩衝材とし
てだけでなく、断熱材、吸音材、湿度調整剤など、種々
の用途に用いることができる。EFFECTS OF THE INVENTION According to the method of the present invention, the aqueous clay dispersion subjected to rapid freezing has extremely excellent clay dispersibility even at a high concentration and prevents bubbles from being mixed therein. After that, it can be freeze-dried to obtain a homogeneous and high-strength porous body. Particularly, according to the present invention, it is possible to obtain a porous body having an excellent product strength as compared with a conventional method using an aqueous clay dispersion having the same concentration, and it is possible to manufacture a porous body having a lower specific gravity and a higher strength. It has an excellent effect. The clay porous body obtained by the present invention can be used not only as a buffer material but also for various applications such as a heat insulating material, a sound absorbing material, and a humidity adjusting agent.
【図１】本発明の実施例により得られた多孔体の固形分
濃度と圧縮強度との関係を示すグラフである。FIG. 1 is a graph showing the relationship between the solid content concentration and the compressive strength of porous bodies obtained according to the examples of the present invention.
Claims (3)
し、得られた水性濃縮化物を急速凍結後凍結乾燥するこ
とを特徴とする粘土多孔体の製造方法。1. A method for producing a clay porous body, which comprises heating and concentrating an aqueous dispersion containing clay, and rapidly freeze-drying the resulting aqueous concentrate, followed by freeze-drying.
％以下であることを特徴とする請求項１記載の粘土多孔
体の製造方法。2. The method for producing a clay porous body according to claim 1, wherein the solid content of the aqueous concentrate is 60% by weight or less.
料、抗菌剤、消臭剤および／または香料を混合させてな
る水性分散液を用いることを特徴とする請求項１又は２
記載の粘土多孔体の製造方法。3. An aqueous dispersion obtained by mixing clay, which is dispersed at a low concentration, with fibers, a colorant, an antibacterial agent, a deodorant and / or a fragrance.
A method for producing the clay porous body described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13661296A JPH09315877A (en) | 1996-05-30 | 1996-05-30 | Production of clay porous body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13661296A JPH09315877A (en) | 1996-05-30 | 1996-05-30 | Production of clay porous body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09315877A true JPH09315877A (en) | 1997-12-09 |
Family
ID=15179379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13661296A Pending JPH09315877A (en) | 1996-05-30 | 1996-05-30 | Production of clay porous body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09315877A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1245549A2 (en) | 2001-03-28 | 2002-10-02 | Asahi Glass Company Ltd. | Process for preparing silicate porous product |
| KR100358400B1 (en) * | 2000-07-22 | 2002-10-25 | 박일순 | Production method of ocher small component (黃土 燒成 粉 生産 方法) |
| JP2012131678A (en) * | 2010-12-24 | 2012-07-12 | Aomori Prefectural Industrial Technology Research Center | Method for manufacturing refined clay, and system for manufacturing clay mineral dispersion frozen body and refined clay |
| WO2015015737A1 (en) | 2013-08-01 | 2015-02-05 | ニチアス株式会社 | Sheet composed of exfoliated clay mineral and method for producing same |
| US10544864B2 (en) | 2015-02-02 | 2020-01-28 | Nichias Corporation | Gasket and manufacturing method thereof |
-
1996
- 1996-05-30 JP JP13661296A patent/JPH09315877A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100358400B1 (en) * | 2000-07-22 | 2002-10-25 | 박일순 | Production method of ocher small component (黃土 燒成 粉 生産 方法) |
| EP1245549A2 (en) | 2001-03-28 | 2002-10-02 | Asahi Glass Company Ltd. | Process for preparing silicate porous product |
| JP2012131678A (en) * | 2010-12-24 | 2012-07-12 | Aomori Prefectural Industrial Technology Research Center | Method for manufacturing refined clay, and system for manufacturing clay mineral dispersion frozen body and refined clay |
| WO2015015737A1 (en) | 2013-08-01 | 2015-02-05 | ニチアス株式会社 | Sheet composed of exfoliated clay mineral and method for producing same |
| US10563104B2 (en) | 2013-08-01 | 2020-02-18 | Nichias Corporation | Sheet composed of exfoliated clay mineral and method for producing same |
| US10544864B2 (en) | 2015-02-02 | 2020-01-28 | Nichias Corporation | Gasket and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105272098B (en) | The preparation method of composite inorganic hydrous salt phase change material and inorganic compounding phase change plate | |
| ATE361265T1 (en) | POLYMER-CEMENT COMPOSITES AND METHOD FOR PRODUCING THE SAME | |
| JPS6025395B2 (en) | Rigid inorganic foam products and their manufacturing method | |
| JPS5945959A (en) | Freely fluidizable dry powder composition | |
| RU2007138556A (en) | GRANULATES FROM NATURAL LAYERED MINERALS AND METHOD FOR PRODUCING THEM | |
| JPH09315877A (en) | Production of clay porous body | |
| JP4032147B2 (en) | Method for producing clay / water-soluble polymer composite porous body | |
| CN110304888A (en) | A kind of heat preservation humidity conditioning dry powder diatom ooze and preparation method thereof | |
| JP2636186B2 (en) | Polysaccharide or polysaccharide-clay composite porous body and method for producing the same | |
| CN105272053A (en) | Active carbon coating powder having air-purifying function | |
| JP2636185B2 (en) | Clay / gelatin composite porous body, its fibrous body, and production method thereof | |
| JP2899239B2 (en) | Method for producing porous clay | |
| JPH07286060A (en) | Porous agar or porous agar-clay composite and its production | |
| CN105272050A (en) | Colored opal coating powder having air-purifying function | |
| CN105198354A (en) | Colored vermiculite coating powder with air purification function | |
| JP2945919B2 (en) | Clay composite porous body and its manufacturing method | |
| JPS63198970A (en) | Hollow sphere of calcium phosphate | |
| JP2004359543A (en) | Foamed silica gel and method for manufacturing it | |
| JPH0747509B2 (en) | Clay / natural fiber composite porous body manufacturing method | |
| JPH03174457A (en) | Preparation of polyurethane sponge | |
| CN105218033A (en) | There is the wilkinite colo(u)r coating powder of air purification function | |
| JPH09238588A (en) | Excreta treating material | |
| JPS62226877A (en) | Manufacture of porous ceramic | |
| JPH01301732A (en) | Highly functional formed product and production thereof | |
| SU893963A2 (en) | Method of producing quartz ceramics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20060407 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060418 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20061010 |