JP3398544B2 - Method for producing perlite cured product - Google Patents
Method for producing perlite cured productInfo
- Publication number
- JP3398544B2 JP3398544B2 JP14423496A JP14423496A JP3398544B2 JP 3398544 B2 JP3398544 B2 JP 3398544B2 JP 14423496 A JP14423496 A JP 14423496A JP 14423496 A JP14423496 A JP 14423496A JP 3398544 B2 JP3398544 B2 JP 3398544B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- pearlite
- water
- sodium hydroxide
- 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.)
- Expired - Lifetime
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
- C04B30/00—Compositions for artificial stone, not containing binders
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、建築内装材、天井
材、保温・断熱材等の用途に用いられる、パーライトを
主体とする軽量無機質成形体の製造方法に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a lightweight inorganic molded body mainly composed of pearlite, which is used for building interior materials, ceiling materials, heat insulating / heat insulating materials and the like.
【０００２】[0002]
【従来の技術】パーライトを用いた無機質成形体として
は、特公昭４８−２２９８０号公報には、パーライトと
酸化カルシウムを反応させてなる軽量成形体が、特開平
７ー２７７８０８号公報には、パーライトと水ガラスを
混合、加熱乾燥して得られた断熱パネルが、ＪＩＳ−Ａ
−９５１２には、パーライトと水ガラスの他に補強用の
無機質繊維を加えて加圧成形したパーライト保温材が記
載されている。また、ＪＩＳ−Ａ−５４１３には、パー
ライトとセメント及び石綿繊維等を抄造成形し、これを
オートクレーブ養生した石綿パーライト板が記載されて
いる。2. Description of the Related Art As an inorganic molded article using pearlite, a lightweight molded article obtained by reacting pearlite with calcium oxide is disclosed in JP-B-48-22980, and pearlite is disclosed in JP-A-7-277808. The heat insulation panel obtained by mixing water glass with water and heating and drying is JIS-A
-9512 describes a pearlite heat insulating material obtained by pressure-molding inorganic fiber for reinforcement in addition to pearlite and water glass. In addition, JIS-A-5413 describes an asbestos pearlite plate obtained by subjecting pearlite, cement, asbestos fiber, and the like to paper-forming and autoclaving.
【０００３】しかしながら、従来のパーライトと酸化カ
ルシウム又は水ガラスとからなる成形体は、曲げ強さや
曲げ弾性率等の物性が低く、特に水ガラスで硬化させた
ものは水と接すると再膨潤するため、耐水性に乏しい材
料である。また、繊維補強したパーライト保温材でも、
曲げ強さが０．３ＭＰａ（密度０．２ｇ／ｃｍ3 ）程度
の低物性であり、保温材としては用いられても、さらに
強度や耐水性の要求される内装壁材や天井材等の建築材
料としては利用できない制約があった。また、石綿パー
ライト板は、曲げ強さが２．０ＭＰａ（密度０．５ｇ／
ｃｍ3 ）と比較的高強度であるが、原料系が複雑であ
り、そのうえ製造方法が煩雑であるという欠点があっ
た。However, the conventional molded article composed of pearlite and calcium oxide or water glass has low physical properties such as flexural strength and flexural modulus, and in particular, those cured with water glass re-swell when they come into contact with water. , A material with poor water resistance. Also, with fiber-reinforced pearlite heat insulating material,
It has low physical properties such as a bending strength of about 0.3 MPa (density of 0.2 g / cm 3 ), and even if it is used as a heat insulating material, it is required to have strength and water resistance. There was a restriction that it could not be used as a material. The asbestos pearlite plate has a bending strength of 2.0 MPa (density 0.5 g /
cm 3 ), which is a relatively high strength, but has a drawback that the raw material system is complicated and the manufacturing method is complicated.
【０００４】[0004]
【発明が解決しようとする課題】したがって、本発明の
目的は、製造工程が簡便であって、しかも軽量でかつ機
械的強度が高く、耐水性も優れた建築材料の製造方法を
提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method of manufacturing a building material which has a simple manufacturing process, is lightweight, has high mechanical strength, and is excellent in water resistance. is there.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、パーライ
トとアルカリ金属水酸化物の水溶液とを混合攪拌し、押
し型等で圧縮して必要な形状に加工した後、乾燥機中で
加熱するか、あるいは該混合物を離型シート上に散布成
層して、直接熱プレスで加熱加圧するという簡単な操作
で、軽量で強度物性が大きく、耐水性に優れた成形体が
得られることを見出し、この知見に基づいて本発明をな
すに至った。Means for Solving the Problems The inventors of the present invention mixed and stirred perlite and an aqueous solution of an alkali metal hydroxide, pressed them with a pressing die to process them into a required shape, and then heated them in a dryer. It was found that a molded product which is lightweight, has large strength properties, and is excellent in water resistance can be obtained by a simple operation of spray-laminating the mixture on a release sheet and directly applying heat and pressure with a hot press. The present invention has been completed based on this finding.
【０００６】すなわち、本発明は、パーライト１００重
量部と水酸化ナトリウム３〜２０重量部とを配合し、５
〜５０重量部の水の共存下で常温又は加温状態で攪拌混
合し、この混合物を賦形した後、 ８０〜２００℃の乾燥
機中で加熱硬化させることを特徴とする密度０．２〜
０．６ｇ／ｃｍ3 のパーライト硬化体の製造方法であ
る。That is, according to the present invention, 100 parts by weight of pearlite and 3 to 20 parts by weight of sodium hydroxide are blended to obtain 5 parts by weight.
˜50 parts by weight of water at room temperature or in a heated state with stirring and mixing, and after shaping this mixture, it is heat-cured in a dryer at 80 to 200 ° C. and has a density of 0.2˜.
This is a method for producing a 0.6 g / cm 3 cured pearlite.
【０００７】また、本発明は、パーライト１００重量部
と水酸化ナトリウム３〜２０重量部とを配合し、５〜５
０重量部の水の共存下で常温又は加温状態で攪拌混合
し、この混合物を離型シート上に散布成層した後、１０
０〜２００℃の熱プレスによって加熱硬化させること特
徴とする密度０．２〜０．６ｇ／ｃｍ3 のパーライト硬
化体の製造方法である。In the present invention, 100 parts by weight of perlite and 3 to 20 parts by weight of sodium hydroxide are blended to obtain 5 to 5 parts by weight.
After stirring and mixing in the coexistence of 0 part by weight of water at room temperature or in a heated state, the mixture is sprayed and layered on a release sheet, and then 10
It is a method for producing a pearlite cured product having a density of 0.2 to 0.6 g / cm 3 , which is characterized by heat curing by a hot press at 0 to 200 ° C.
【０００８】[0008]
【０００９】[0009]
【発明の実施の形態】本発明において主材として用いら
れるパーライトは、黒曜石、真珠岩、松脂岩等の天然ガ
ラス質岩石粉砕物を急熱して発泡させた人工軽量骨材で
あり、その性状・形状等は特に限定されないが、嵩比重
０．０４〜０．２、平均粒径０．５ｍｍ以下のものが好
適に用いられる。BEST MODE FOR CARRYING OUT THE INVENTION Perlite used as a main material in the present invention is an artificial lightweight aggregate obtained by rapidly heating and foaming natural glassy rock crushed materials such as obsidian, pearlite, and pinelite. The shape and the like are not particularly limited, but those having a bulk specific gravity of 0.04 to 0.2 and an average particle diameter of 0.5 mm or less are preferably used.
【００１０】また、アルカリ金属水酸化物は、例えば水
酸化ナトリウム、水酸化カリウム、水酸化リチウム等が
使用可能であるが、費用対効果の観点から、特に水酸化
ナトリウムが好ましい。以下、水酸化ナトリウムを使用
したパーライト成形体について説明するが、水酸化ナト
リウムの一部又は全部を、水酸化カリウム、水酸化リチ
ウム等の他のアルカリ金属水酸化物で置換することがで
きるものであり、本発明は水酸化ナトリウムのみに限定
されるものではない。As the alkali metal hydroxide, for example, sodium hydroxide, potassium hydroxide, lithium hydroxide and the like can be used, but sodium hydroxide is particularly preferable from the viewpoint of cost efficiency. Hereinafter, a pearlite molded body using sodium hydroxide will be described, but it is possible to replace part or all of sodium hydroxide with another alkali metal hydroxide such as potassium hydroxide or lithium hydroxide. However, the present invention is not limited to sodium hydroxide.
【００１１】本発明のパーライト成形体において、パー
ライトと水酸化ナトリウムの配合割合は、パーライト１
００重量部に対し、水酸化ナトリウム３〜２０重量部、
好ましくは５〜１５重量部である。水酸化ナトリウムが
３重量部より少ないと成形体の強度が低く、２０重量部
を超えると成形体にクラックを生じて実用性がない。ま
た、パーライトに対する水分の共存量は、パーライト１
００重量部に対し、水分５〜５０重量部である。水分が
５重量部より少ないと成形不能であり、５０重量部を超
えると加熱処理に長時間を要するようになり、生産性が
低下する。In the molded pearlite of the present invention, the mixing ratio of pearlite and sodium hydroxide is 1 pearlite.
3 to 20 parts by weight of sodium hydroxide with respect to 00 parts by weight,
It is preferably 5 to 15 parts by weight. If the content of sodium hydroxide is less than 3 parts by weight, the strength of the molded product will be low, and if it exceeds 20 parts by weight, the molded product will be cracked, which is not practical. In addition, the coexistence amount of water with respect to perlite is 1 perlite.
The water content is 5 to 50 parts by weight with respect to 00 parts by weight. If the water content is less than 5 parts by weight, molding cannot be performed, and if the water content exceeds 50 parts by weight, the heat treatment requires a long time and the productivity is reduced.
【００１２】本発明のパーライト成形体の密度は、０．
２〜０．６ｇ／ｃｍ3 であることを要する。成形体密度
が０．２ｇ／ｃｍ3 より小さいと必要な強度物性が得ら
れず、０．６ｇ／ｃｍ3 を超えると軽量建材としての特
性が損なわれる。The density of the pearlite molding of the present invention is 0.
It is required to be 2 to 0.6 g / cm 3 . If the density of the molded product is less than 0.2 g / cm 3 , the required strength and physical properties cannot be obtained, and if it exceeds 0.6 g / cm 3 , the properties as a lightweight building material are impaired.
【００１３】本発明のパーライト硬化体には、使用目的
に応じて、各種の混和剤、増量剤、骨材や、例えばガラ
ス繊維、鉱物繊維、金属繊維、有機合成繊維、木質繊維
等の繊維物質、さらに各種の有機高分子物質などを添加
してもよい。The hardened pearlite of the present invention contains various admixtures, extenders, aggregates, and fibrous substances such as glass fibers, mineral fibers, metal fibers, organic synthetic fibers, and wood fibers depending on the purpose of use. Further, various organic polymer substances may be added.
【００１４】本発明のパーライト硬化体の製造方法につ
いて説明すると、まず、パーライト１００重量部に対
し、水酸化ナトリウム水溶液を固形分換算で３〜２０重
量部、好ましくは５〜１５重量部となるように添加し、
リボンミキサー、マラー混合機、ニーダー、パッグミル
等の混合機にこれらの材料を投入し、常温又は加温下で
攪拌混合すると、少し湿った状態の原料混合物が得られ
る。この際、水分量はパーライト１００重量部に対し、
５〜５０重量部となるように設定する。この水分量の調
整は、水酸化ナトリウム水溶液濃度を調節するか、又は
必要な水を後添加する方法で行うことができる。なお、
加温下で攪拌混合する場合は、過剰の水を添加し、加熱
攪拌過程で余剰の水分を除去することもできる。The method for producing a hardened pearlite of the present invention will be described. First, with respect to 100 parts by weight of pearlite, an aqueous solution of sodium hydroxide is converted into a solid content of 3 to 20 parts by weight, preferably 5 to 15 parts by weight. Added to
When these materials are put into a mixer such as a ribbon mixer, a muller mixer, a kneader, and a pug mill, and mixed by stirring at room temperature or under heating, a slightly wet raw material mixture is obtained. At this time, the amount of water is 100 parts by weight of perlite,
It is set to be 5 to 50 parts by weight. The amount of water can be adjusted by adjusting the sodium hydroxide aqueous solution concentration or by adding necessary water afterwards. In addition,
When stirring and mixing under heating, excess water can be added to remove excess water during the heating and stirring process.
【００１５】次に、この原料混合物を適当な型に充填し
て圧締するか、又は成形ロール等で圧縮して賦形した
後、８０〜２００℃の乾燥機に入れて、水分がほぼ蒸発
し、全乾となるまで１〜３時間程度、加熱処理を行うこ
とにより、成形体を製造することができる。加熱温度が
８０℃より低いと脱水に時間がかかり、２００℃を超え
ると急速な脱水が起こり、十分な強度物性が得られな
い。Next, the raw material mixture is filled in an appropriate mold and compressed, or after being compressed and shaped by a molding roll or the like, the mixture is put in a dryer at 80 to 200 ° C. to almost evaporate the water content. Then, the molded body can be manufactured by performing the heat treatment for about 1 to 3 hours until it becomes completely dry. If the heating temperature is lower than 80 ° C, it takes a long time to dehydrate, and if it exceeds 200 ° C, rapid dehydration occurs and sufficient strength physical properties cannot be obtained.
【００１６】また、成形の他の方法として、離型シート
上に原料混合物を散布成層した後、１００〜２００℃の
多段熱プレスやダブルベルトプレス等の加熱加圧成形機
を用いて、直接、加熱加圧して成形体を製造する方法も
採用できる。圧縮操作は、成形体密度が０．２〜０．６
ｇ／ｃｍ3 となるように、成形圧力を調節するか、厚み
調節用のバーを使用して行う。通常、０．０１〜２ＭＰ
ａの圧力範囲がよい。加熱温度が１００℃より低いと脱
水に時間がかかり、２００℃を超えると急速な脱水が起
こり、十分な強度物性が得られない。加熱時間は、製品
厚さ１ｍｍ当たりほぼ１〜２分程度で十分である。As another method of molding, after the raw material mixture is sprinkled and layered on the release sheet, it is directly heated by using a heat and pressure molding machine such as a multi-stage hot press at 100 to 200 ° C. or a double belt press. A method of producing a molded product by heating and pressing can also be adopted. The compacting operation has a compact density of 0.2 to 0.6.
The molding pressure is adjusted to be g / cm 3 , or a bar for adjusting the thickness is used. Normally 0.01-2MP
The pressure range of a is good. If the heating temperature is lower than 100 ° C., it takes time to dehydrate, and if it exceeds 200 ° C., rapid dehydration occurs and sufficient strength physical properties cannot be obtained. A heating time of about 1 to 2 minutes per 1 mm of product thickness is sufficient.
【００１７】このようにして得られたパーライト成形体
は、曲げ強さが０．３〜５ＭＰａ、曲げ弾性率が７〜４
０ＭＰａと高い強度物性を有し、これを水に浸漬しても
強度低下を起こさず、優れた耐水性を示すものである。
また、有機物を含有していないので、優れた耐火性、不
燃性を有する。The pearlite molded body thus obtained has a bending strength of 0.3 to 5 MPa and a bending elastic modulus of 7 to 4.
It has a high strength physical property of 0 MPa, does not cause strength reduction even when immersed in water, and exhibits excellent water resistance.
Further, since it contains no organic matter, it has excellent fire resistance and incombustibility.
【００１８】[0018]
【作用】本発明の作用は、まだ十分に解明されてはいな
いが、加熱過程で、パーライト主成分であるシリカ及び
随伴する副成分アルミナ等の一部が水分の共存下で水酸
化ナトリウムと反応して、アルミナ等で修飾されたケイ
酸ナトリウムとなり、固体として残存している未反応の
パーライト表面に析出する。この析出物は加熱過程で、
さらに脱水されゲル化し、固化する。この過程で、この
アルミナ等で修飾されたケイ酸ナトリウムがバインダー
として作用し、未反応のパーライト粒子同士を結合する
ものと考えられる。また、この未反応のパーライトが残
存することによって、得られる成形体に軽量性が付与さ
れる。The function of the present invention has not been fully clarified yet, but in the heating process, part of silica, which is the main component of pearlite, and the accompanying auxiliary component, alumina, reacts with sodium hydroxide in the presence of water. Then, it becomes sodium silicate modified with alumina or the like and is deposited on the unreacted pearlite surface which remains as a solid. During the heating process, this precipitate is
Further, it is dehydrated, gelled, and solidified. It is considered that in this process, the sodium silicate modified with alumina or the like acts as a binder to bond the unreacted perlite particles. Further, the unreacted pearlite remains, so that the obtained molded body is given lightness.
【００１９】シリカのアルカリ金属塩ゾルは水ガラスと
して知られており、種々のバインダーとして用いられて
いるが、水ガラスをバインダーとする成形体は耐水性が
得られないのが普通である。これに対し、本発明は、以
下の実施例に示したように、水ガラスとパーライトとを
単純に混合して加熱した場合に比べて、耐水性の発現が
明らかに大きいことから、パーライトに含まれるシリカ
以外の共存成分、例えばアルミナ成分もこれらの反応に
関与し、水ガラス単純添加系よりもより耐水性に優れた
強固なバインダー物質が生成すると考えられる。また、
耐水性に関しては、上記の解釈の他に、生成したバイン
ダー物質はアルカリと未反応の固体状のパーライトと結
合しており、結果としてより高分子的な挙動を示すこと
により耐水性が得られると考えられる。Alkali metal salt sol of silica is known as water glass and is used as various binders, but a molded body using water glass as a binder usually cannot obtain water resistance. On the other hand, the present invention, as shown in the following examples, compared to the case where water glass and perlite are simply mixed and heated, since the development of water resistance is obviously large, it is included in perlite. It is considered that a coexisting component other than silica, for example, an alumina component, also participates in these reactions and forms a strong binder substance having more excellent water resistance than the water glass simple addition system. Also,
Regarding the water resistance, in addition to the above interpretation, the produced binder substance is bound to alkali-unreacted solid pearlite, and as a result, water resistance is obtained by exhibiting a more polymeric behavior. Conceivable.
【００２０】本発明において、パーライトを用いた他の
理由は、パーライト中のシリカ成分はガラス質であり、
アルカリとの反応性に優れているために、本発明の温和
な温度範囲、処理時間のもとで、成形体が得られるから
である。このようにして、実用上、作業性や経済性に優
れた成形体を得ることができる。これに対し、結晶質の
シリカ（比較例に珪砂を使用した場合について示した）
では、本発明の条件では成形体は得ることは困難であ
り、さらに過酷な反応条件が必要となる。また、アルカ
リ金属水酸化物以外のアルカリ化合物、例えばこれらの
炭酸塩や硫酸塩等を用いた場合、さらにアルカリ土金属
水酸化物又はこれらの塩類を用いた場合にも、本発明の
条件では成形体を得ることができない。特に、アルカリ
土金属とシリカ質との反応は、セメントと同様の水硬性
反応をベースとしており、多量の水分のもとで反応が進
行するもので、本発明の水分条件と温度条件のもとでは
反応しない。Another reason for using perlite in the present invention is that the silica component in perlite is vitreous,
This is because, because of its excellent reactivity with alkali, a molded product can be obtained within the mild temperature range and treatment time of the present invention. In this way, it is possible to obtain a molded product that is practically excellent in workability and economy. On the other hand, crystalline silica (shown when silica sand is used as a comparative example)
Then, it is difficult to obtain a molded product under the conditions of the present invention, and more severe reaction conditions are required. Further, when an alkali compound other than the alkali metal hydroxide, for example, a carbonate or a sulfate thereof is used, or when an alkaline earth metal hydroxide or a salt thereof is further used, molding is performed under the conditions of the present invention. I can't get a body. In particular, the reaction between the alkaline earth metal and the siliceous material is based on a hydraulic reaction similar to that of cement, and the reaction proceeds under a large amount of water. Under the water and temperature conditions of the present invention, Does not react.
【００２１】また、シリカと水酸化ナトリウムの反応に
は水の存在が不可欠であり、一方、反応物の固化には水
の除去が不可欠であるために、通常、まず、水共存下で
シリカと水酸化ナトリウムを反応させ、その後、脱水固
化させるという２段の操作が必要となる。本発明では、
パーライトを用いたこと、及び加熱条件と水分添加条件
を特定の範囲に調節することにより、パーライトに水酸
化ナトリウム水溶液を混合して加熱又は加圧するという
１段の操作で、成形体を得ることができる。The presence of water is indispensable for the reaction between silica and sodium hydroxide, and on the other hand, the removal of water is indispensable for the solidification of the reaction product. A two-step operation of reacting sodium hydroxide and then dehydrating and solidifying is required. In the present invention,
By using perlite and adjusting the heating condition and the water addition condition within a specific range, a molded product can be obtained by a one-step operation of mixing an aqueous sodium hydroxide solution with perlite and heating or pressurizing. it can.
【００２２】[0022]
【実施例】以下、実施例及び比較例に基づいて本発明を
説明する。
実施例１
平均粒径０．２〜０．３ｍｍ、嵩密度０．０９〜０．１
２ｇ／ｃｍ3 のパーライト（三井金属鉱業株式会社製、
三井パーライト・加工用４号）１００重量部に対し、濃
度２８．６％の水酸化ナトリウム水溶液３５重量部を加
えてリボン型ミキサーで均一に撹拌混合した。この混合
物２９２ｇを離型剤を塗布した鋼板上に３０ｃｍ×３０
ｃｍの大きさで一様な厚さに散布成層した後、１３ｍｍ
の厚み規制バーを置いた、温度１６０℃、設定圧力２．
０ＭＰａの熱プレスに挿入した。熱盤が厚み規制バーに
着いた後、さらに１０分間加熱して成形体を作製した。
なお、厚み規制バーに着いた時の圧力は約０．２ＭＰａ
であった。この成形条件は、パーライト１００重量部に
対する水酸化ナトリウム固形分を１０重量部とし、成形
体密度を０．２０ｇ／ｃｍ3 に設定したときのものであ
る。このようにして作製した成形体を３ｃｍ×２０ｃｍ
に切り出して曲げ試験を実施した。また、水中に７日間
浸漬した後、湿潤状態の曲げ試験を実施した。EXAMPLES The present invention will be described below based on Examples and Comparative Examples. Example 1 Average particle size 0.2 to 0.3 mm, bulk density 0.09 to 0.1
2g / cm 3 perlite (Mitsui Mining & Smelting Co.,
To 100 parts by weight of Mitsui pearlite / processing No. 4), 35 parts by weight of an aqueous sodium hydroxide solution having a concentration of 28.6% were added and uniformly stirred and mixed by a ribbon mixer. 292 g of this mixture was placed on a steel plate coated with a release agent, and was 30 cm × 30.
13 mm after layering to a uniform thickness of cm
1. Set the thickness control bar at 160 ° C and set pressure 2.
It was inserted into a 0 MPa hot press. After the hot platen reached the thickness control bar, it was further heated for 10 minutes to prepare a molded body.
The pressure when reaching the thickness control bar is about 0.2 MPa.
Met. The molding conditions are such that the solid content of sodium hydroxide is 10 parts by weight with respect to 100 parts by weight of pearlite, and the density of the molded body is set to 0.20 g / cm 3 . The molded body produced in this way is 3 cm x 20 cm
It was cut out and subjected to a bending test. Moreover, after being immersed in water for 7 days, a bending test in a wet state was carried out.
【００２３】実施例２
実施例１のパーライト・水酸化ナトリウム水溶液混合物
の散布成層量を５９１ｇとし、成形体密度設定を０．４
０ｇ／ｃｍ3 とした以外は、実施例１と同様にして成形
体を作製し、物性を測定した。なお、このときの厚み規
制バー着きの圧力は約０．５〜０．６ＭＰａであった。Example 2 The dispersion layer amount of the pearlite / sodium hydroxide aqueous solution mixture of Example 1 was set to 591 g, and the compact density was set to 0.4.
A molded body was produced in the same manner as in Example 1 except that the amount was 0 g / cm 3, and the physical properties were measured. In addition, the pressure at which the thickness regulating bar arrived was about 0.5 to 0.6 MPa.
【００２４】実施例３
実施例１のパーライト・水酸化ナトリウム水溶液混合物
の散布成層量を８８６ｇとし、成形体密度設定を０．６
０ｇ／ｃｍ3 とした以外は、実施例１と同様にして成形
体を作製し、物性を測定した。なお、このときの厚み規
制バー着きの圧力は約１．０ＭＰａであった。Example 3 The dispersion layer amount of the pearlite / sodium hydroxide aqueous solution mixture of Example 1 was set to 886 g, and the compact density was set to 0.6.
A molded body was produced in the same manner as in Example 1 except that the amount was 0 g / cm 3, and the physical properties were measured. In addition, the pressure at which the thickness regulating bar arrived was about 1.0 MPa.
【００２５】実施例４
実施例１のパーライトに対する水酸化ナトリウム水溶液
の添加量を１７．５重量部（固形分５重量部）とし、パ
ーライト・水酸化ナトリウム水溶液混合物の散布成層量
を５３９ｇとし、成形体密度設定を０．４０ｇ／ｃｍ3
とした以外は、実施例１と同様にして成形体を作製し、
物性を測定した。なお、このときの厚み規制バー着きの
圧力は約０．６〜０．７ＭＰａであった。Example 4 The amount of sodium hydroxide aqueous solution added to the perlite of Example 1 was 17.5 parts by weight (solid content 5 parts by weight), and the dispersion layer amount of the perlite / sodium hydroxide aqueous solution mixture was 539 g. Body density setting 0.40 g / cm 3
A molded body was prepared in the same manner as in Example 1 except that
The physical properties were measured. In addition, the pressure of the thickness regulation bar at this time was about 0.6 to 0.7 MPa.
【００２６】実施例５
実施例１のパーライト・水酸化ナトリウム水溶液混合物
５０７ｇを、離型剤を塗布した３０ｃｍ×３０ｃｍの型
に充填した後、冷間プレスに挿入し、厚さ１０ｍｍの凝
集体を形成した。この凝集体を１７０℃の乾燥機で３時
間乾燥して成形体を作製した。この成形条件は、パーラ
イト１００重量部に対する水酸化ナトリウム固形分配合
比１０重量部、成形体密度を０．４５ｇ／ｃｍ3 に設定
したときのものである。得られた成形体を３ｃｍ×２０
ｃｍに切り出して曲げ試験を実施した。また、水中に７
日間浸漬した後、湿潤状態の曲げ試験を実施した。Example 5 507 g of the pearlite / sodium hydroxide aqueous solution mixture of Example 1 was filled in a mold of 30 cm × 30 cm coated with a mold release agent and then inserted into a cold press to form an aggregate having a thickness of 10 mm. Formed. This aggregate was dried in a dryer at 170 ° C. for 3 hours to prepare a molded body. The molding conditions are such that the mixing ratio of solid sodium hydroxide content to 100 parts by weight of pearlite is 10 parts by weight and the density of the molded body is set to 0.45 g / cm 3 . The obtained molded body is 3 cm x 20
Bending test was carried out by cutting out to cm. In addition, 7 in the water
After soaking for a day, a bending test in a wet state was carried out.
【００２７】実施例１〜５の成形条件及び測定結果を表
１に掲げる。表１のＮａＯＨ添加量は、パーライト１０
０重量部に対する計算純重量部数を示す。Table 1 shows molding conditions and measurement results of Examples 1 to 5. The amount of NaOH added in Table 1 is perlite 10
The calculated number of pure parts by weight relative to 0 parts by weight is shown.
【００２８】比較例１
実施例１のパーライト・水酸化ナトリウム水溶液混合物
の散布成層量を２２０ｇとし、密度設定を０．１５ｇ／
ｃｍ3 とした以外は、実施例１と同様にして成形体を作
製したが、得られた成形体は手で持つと壊れてしまい、
物性の測定はできなかった。なお、このときの厚み規制
バー着きの圧力は約０．１ＭＰａ以下であった。Comparative Example 1 The dispersion layer amount of the pearlite / sodium hydroxide aqueous solution mixture of Example 1 was 220 g, and the density was set to 0.15 g /
A molded body was prepared in the same manner as in Example 1 except that the size was changed to cm 3 , but the molded body obtained was broken when held by hand,
The physical properties could not be measured. At this time, the pressure at which the thickness-regulating bar arrived was about 0.1 MPa or less.
【００２９】比較例２
実施例１のパーライトに対する水酸化ナトリウム水溶液
添加量を１０．５重量部（固形分３重量部）とし、パー
ライト・水酸化ナトリウム水溶液混合物の散布成層量を
５１０ｇとし、成形体密度設定を０．４０ｇ／ｃｍ3 と
した以外は実施例１と同様にして成形体を作製し、物性
を測定した。なお、このときの厚み規制バー着きの圧力
は約０．５〜０．６ＭＰａであった。Comparative Example 2 The amount of sodium hydroxide aqueous solution added to the pearlite of Example 1 was 10.5 parts by weight (solid content: 3 parts by weight), and the dispersion layer amount of the pearlite / sodium hydroxide aqueous solution mixture was 510 g. A molded body was prepared in the same manner as in Example 1 except that the density was set to 0.40 g / cm 3, and the physical properties were measured. In addition, the pressure at which the thickness regulating bar arrived was about 0.5 to 0.6 MPa.
【００３０】比較例３
実施例１のパーライト１００重量部に対し、濃度３５％
の水酸化ナトリウム水溶液添加量を７１．５重量部（固
形分２５重量部）配合した、パーライト・水酸化ナトリ
ウム水溶液混合物を６５４ｇ散布成層し、成形体密度設
定を０．４０ｇ／ｃｍ3 とした以外は、実施例１と同様
にして成形体を作製したが、得られた成形体には亀甲状
のクラックが発生していた。Comparative Example 3 With respect to 100 parts by weight of pearlite of Example 1, a concentration of 35%
654 g of a pearlite / sodium hydroxide aqueous solution mixture containing 71.5 parts by weight of sodium hydroxide aqueous solution (solid content of 25 parts by weight) was sprinkled and the density of the molded body was set to 0.40 g / cm 3. A molded body was produced in the same manner as in Example 1, but a hexagonal crack was generated in the obtained molded body.
【００３１】比較例４
実施例１のパーライト１００重量部に対し、二酸化ケイ
素３０％、水酸化ナトリウム１０％含有の３号水ガラス
２００重量部を加えてリボン型ミキサーで均一に撹拌混
合した。この混合物５７７ｇを離型剤を塗布した鋼板上
に３０ｃｍ×３０ｃｍの大きさで一様な厚さに散布成層
した後、厚み規制用のバーのない熱プレスに挿入し、温
度１６０℃、圧力０．７ＭＰａの条件で１０分間加熱加
圧して成形体を作製した。この成形条件は、パーライト
１００重量部に対する水酸化ナトリウム固形分配合比１
０重量部に設定したときのものである。得られた成形体
を３ｃｍ×２０ｃｍに切り出して曲げ試験を実施した。
また、水中に７日間浸漬した後、湿潤状態の曲げ試験を
実施した。水浸漬によって成形体は崩壊し、耐水性がな
いことがわかった。Comparative Example 4 200 parts by weight of No. 3 water glass containing 30% of silicon dioxide and 10% of sodium hydroxide was added to 100 parts by weight of pearlite of Example 1 and uniformly mixed with a ribbon mixer. After 577 g of this mixture was spread and layered on a steel sheet coated with a release agent in a size of 30 cm × 30 cm to a uniform thickness, the mixture was inserted into a hot press having no bar for controlling thickness, and the temperature was 160 ° C. and the pressure was 0. A molded body was produced by heating and pressing for 10 minutes under the condition of 0.7 MPa. This molding condition is that the mixing ratio of sodium hydroxide solid content to 1 part by weight of pearlite is 1
This is when set to 0 parts by weight. The obtained molded body was cut into 3 cm × 20 cm and a bending test was performed.
Moreover, after being immersed in water for 7 days, a bending test in a wet state was carried out. It was found that the molded body was disintegrated by immersion in water and had no water resistance.
【００３２】比較例５
パーライトに代えて珪砂８号１００重量部に対し、濃度
２８．６％の水酸化ナトリウム水溶液３５重量部（固形
分１０重量部）を加えてリボン型ミキサーで均一に撹拌
混合した。この混合物７７９ｇを離型剤を塗布した鋼板
上に３０ｃｍ×３０ｃｍの大きさで一様な厚さに散布成
層した後、厚み規制用のバーのない熱プレスに挿入し、
温度１６０℃、圧力２．０ＭＰａの条件で１０分間加熱
加圧したが、珪砂粉体は固まらず、成形体はできなかっ
た。Comparative Example 5 35 parts by weight of a sodium hydroxide aqueous solution having a concentration of 28.6% (solid content: 10 parts by weight) was added to 100 parts by weight of silica sand No. 8 in place of pearlite, and the mixture was uniformly stirred and mixed by a ribbon mixer. did. 779 g of this mixture was spread on a steel plate coated with a release agent in a uniform size of 30 cm × 30 cm, and then the mixture was inserted into a hot press having no bar for controlling thickness,
When heated and pressed for 10 minutes under the conditions of a temperature of 160 ° C. and a pressure of 2.0 MPa, the silica sand powder did not solidify and a compact could not be formed.
【００３３】比較例６
実施例１のパーライト１００重量部に対し、水酸化カル
シウム１０重量部を水２５重量部に懸濁させて添加し、
リボン型ミキサーで均一に攪拌混合した。この混合物５
００ｇを離型剤を塗布した鋼板上に３０ｃｍ×３０ｃｍ
の大きさで一様な厚さに散布成層した後、厚み規制用の
バーのない熱プレスに挿入し、温度１６０℃、圧力０．
７ＭＰａの条件で１０分間加熱加圧したが、混合物は固
まらず、成形体はできなかった。Comparative Example 6 To 100 parts by weight of the pearlite of Example 1, 10 parts by weight of calcium hydroxide was suspended in 25 parts by weight of water and added.
A ribbon type mixer was used to uniformly stir and mix. This mixture 5
00g on a steel plate coated with a release agent 30cm x 30cm
Layered to a uniform thickness and then inserted into a hot press without a bar for thickness control, at a temperature of 160 ° C and a pressure of 0.
The mixture was heated and pressed under the condition of 7 MPa for 10 minutes, but the mixture did not solidify and a molded body could not be formed.
【００３４】比較例１〜４の成形条件及び測定結果を表
２に掲げる。表２のＮａＯＨ添加量は、パーライト１０
０重量部に対する計算純重量部数を示す。Table 2 shows molding conditions and measurement results of Comparative Examples 1 to 4. The addition amount of NaOH in Table 2 is perlite 10
The calculated number of pure parts by weight relative to 0 parts by weight is shown.
【００３５】[0035]
【表１】 [Table 1]
【００３６】[0036]
【表２】 [Table 2]
【００３７】[0037]
【発明の効果】以上、説明した本発明は、パーライトに
アルカリ金属水酸化物の水溶液を加えて加熱又は加熱加
圧するという簡単な操作で、軽量で機械的強度や耐水
性、耐火性及び経済性にも優れた、建築内装壁材、天井
材や保温、断熱材として使用できる成形体を製造するこ
とができる。INDUSTRIAL APPLICABILITY The present invention described above is light in weight, mechanical strength, water resistance, fire resistance, and economic efficiency by a simple operation of adding an aqueous solution of an alkali metal hydroxide to perlite and heating or heating and pressing. It is also possible to produce a molded article that can be used as a wall material for building interior, a ceiling material, a heat insulating material, and a heat insulating material.
フロントページの続き (56)参考文献 特開 平６−48808（ＪＰ，Ａ) 特開 昭64−42335（ＪＰ，Ａ) 特開 昭49−99715（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C04B 38/00 - 38/10 Continuation of the front page (56) Reference JP-A-6-48808 (JP, A) JP-A 64-42335 (JP, A) JP-A 49-99715 (JP, A) (58) Fields investigated (Int .Cl. 7 , DB name) C04B 38/00-38/10
Claims (2)
ウム３〜２０重量部とを配合し、５〜５０重量部の水の
共存下で常温又は加温状態で攪拌混合し、この混合物を
賦形した後、 ８０〜２００℃の乾燥機中で加熱硬化させ
ることを特徴とする密度０．２〜０．６ｇ／ｃｍ3 のパ
ーライト硬化体の製造方法。1. 100 parts by weight of pearlite and 3 to 20 parts by weight of sodium hydroxide are mixed and stirred and mixed in the coexistence of 5 to 50 parts by weight of water at room temperature or in a heated state, and this mixture is shaped. Then, the mixture is heated and cured in a drier at 80 to 200 ° C. to provide a method for producing a pearlite cured product having a density of 0.2 to 0.6 g / cm 3 .
ウム３〜２０重量部とを配合し、５〜５０重量部の水の
共存下で常温又は加温状態で攪拌混合し、この混合物を
離型シート上に散布成層した後、１００〜２００℃の熱
プレスによって加熱硬化させること特徴とする密度０．
２〜０．６ｇ／ｃｍ3 のパーライト硬化体の製造方法。2. 100 parts by weight of perlite and 3 to 20 parts by weight of sodium hydroxide are mixed and stirred and mixed in the coexistence of 5 to 50 parts by weight of water at room temperature or in a heated state, and this mixture is released. After layering by spraying on top, it is heat-cured by a hot press at 100 to 200 ° C.
A method for producing a pearlite cured product of 2 to 0.6 g / cm 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14423496A JP3398544B2 (en) | 1996-06-06 | 1996-06-06 | Method for producing perlite cured product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14423496A JP3398544B2 (en) | 1996-06-06 | 1996-06-06 | Method for producing perlite cured product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09328374A JPH09328374A (en) | 1997-12-22 |
| JP3398544B2 true JP3398544B2 (en) | 2003-04-21 |
Family
ID=15357376
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14423496A Expired - Lifetime JP3398544B2 (en) | 1996-06-06 | 1996-06-06 | Method for producing perlite cured product |
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| Country | Link |
|---|---|
| JP (1) | JP3398544B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4565209B2 (en) * | 2000-06-15 | 2010-10-20 | 宮城県 | Moisture-absorbing / releasing lightweight molded body and method for producing the same |
| JP2003081679A (en) * | 2001-09-05 | 2003-03-19 | Keiichi Katsuyo | Moisture absorbing and desorbing material and method of producing the same |
| KR101142170B1 (en) * | 2010-03-05 | 2012-05-03 | 주식회사 경동세라텍 | Heat insulation using expanded perlite of closed cell |
-
1996
- 1996-06-06 JP JP14423496A patent/JP3398544B2/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| JPH09328374A (en) | 1997-12-22 |
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