JP2004049361A - Artificial pumice and using of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piece of artificial pumice suitable for impregnating and holding washing material and a method for manufacturing it, and to provide the artificial pumice containing the washing material and a method for manufacturing it. <P>SOLUTION: The method prepares the artificial pumice through: a process of blending calcination component of 10 to 40 wt.% by an outer percentage to a composition of 100 wt.% containing fly ash of 35 to 60 wt.%, kieselguhr of 35 to 60 wt.%, and clay of 3 to 30 wt.%; a process of mixing it; a process of molding it; and a process of calcinating it. <P>COPYRIGHT: (C)2004,JPO

Description

【００２４】
本発明においては、当該見掛気孔率は「耐火れんがの見掛気孔率・吸水率・比重の測定方法」ＪＩＳ　Ｒ　２２０５−１９９２に従って、下式によって求めることができる。
【００２５】
【数２】

【００２６】
なお、ここで乾燥試料の質量、飽水試料の水中質量及び飽水試料の質量はいずれも上記ＪＩＳ　Ｒ　２２０５−１９９２に規定される方法に従って測定することができる。
【００２７】
さらに、本発明の人造軽石は、圧縮強さが５０ｋｇ以上と、軽石として最低限要求される耐破砕性及び耐摩耗性を保有していることが望ましい。好ましくは６０ｋｇ以上、より好ましくは８５ｋｇ以上である。ここで圧縮強さは「耐火レンガの圧縮強さの試験方法」ＪＩＳ　　Ｒ２２０６に従って測定することができ、当該方法によって測定し得られる値をいう。
【００２８】
このため、本発明はそのままの状態で軽石として垢すりや皮膚の角質除去に使用できるとともに、洗浄料を含浸させた状態で洗浄料含有人造軽石として提供することもできる。
【００２９】
（２）洗浄料含有人造軽石
本発明は、洗浄料含有人造軽石を提供する。
【００３０】
本発明の洗浄料含有人造軽石は、上記の本発明の軽石を液体状態に調製した洗浄料に浸漬し含浸させ、次いで冷却固化することによって調製することができる。
【００３１】
ここで用いられる洗浄料としては、洗浄成分を含有するものであって、上記の調製が可能であれば特に制限されない。
【００３２】
本発明で用いられる洗浄料は、洗浄成分として界面活性剤を１種単独若しくは２種以上を組み合わせて含有することができる。界面活性剤としては、特に制限されずカチオン界面活性剤、アニオン界面活性剤、ノニオン界面活性剤、及び両性界面活性剤のいずれをも使用することができる。
【００３３】
さらに洗浄料は、上記性質を損なわない範囲で、殺菌・抗菌剤、起泡剤、粘度調整剤、香料、着色料、ｐＨ調整剤、消臭・防臭剤、及び希釈剤を含有していてもよい。
【００３４】
ここで殺菌・抗菌剤としては、アルキルトリメチルアンモニウムクロリド、アルキルベンジルジメチルアンモニウムクロリド等の４級アンモニウム塩型のカチオン界面活性剤；Ｎ−アルキルベタインやアルキルベタイン（例えば、ラウリルジメチルアミノ酢酸ベタイン、ヤシ油アルキルベタイン、ラウリン酸アミドプロピルベタイン、ヤシ油脂肪酸プロピルベタイン、２−アルキル−Ｎ−カルボキシメチル−Ｎ−ヒドロキシエチルイミダゾリニウムベタインなど）等のベタイン型の両性界面活性剤を挙げることができる。
【００３５】
具体的な殺菌剤として、アルキルトリメチルアンモニウムクロリドとしては、ラウリルトリメチルアンモニウムクロライドやベヘニルトリメチルアンモニウムクロライドを、アルキルベンジルジメチルアンモニウムクロリドとしては、ジミリスチルジメチルアンモニウムクロライドやジステアリルジメチルアンモニウムクロライドを挙げることができる。
【００３６】
また起泡剤としてはラウリル硫酸ナトリウム、ラウリル酸ジエタノールアミド並びに炭素数１２〜１８の脂肪酸塩、具体的にはラウリン酸塩、ステアリ酸塩、パルミチン酸塩及びミリスチン酸塩を挙げることができる。なお、ここで脂肪酸の塩としては、ナトリウム及びカリウムなどの脂肪酸のアルカリ金属塩、及び脂肪酸亜鉛を挙げることができる。
【００３７】
さらに粘度調整剤としては、グリセリン、ひまし油、スクワラン、パルミチン酸、白色ワセリン、ミツロウ、流動パラフィン、１，３−ブチレングリコール等を；ｐＨ調整剤としては、塩酸、酢酸、クエン酸、硫酸、水酸化ナトリウム、アンモニア等を；また消臭・防臭剤としてはカテキンやフラボノイド等の天然系消臭剤並びにラウリルジメチルアミノ酢酸ベタインなどのベタイン系消臭剤を挙げることができる。また希釈剤としては水、及びエタノールなどのアルコールを挙げることができる。
【００３８】
本発明で用いる洗浄料は、加熱することにより液状とすることができ、冷却することにより固化するような性質を有するものである。より具体的には洗浄料は２５℃以下、好ましくは３５℃以下、より好ましくは４０℃以下、さらに好ましくは４５℃以下で固体状を有し、また５０〜３００℃の範囲における温度での加熱で、好ましくは５０〜２００℃、より好ましくは５０〜１５０℃、さらに好ましくは５０〜１００℃、さらに好ましくは５５〜８０℃の範囲における温度での加熱で液体状を呈することが望ましい。
【００３９】
本発明の洗浄料含有人造軽石は、好ましくは上記洗浄料を加温して液状とし、これに本発明の人造軽石を浸漬して洗浄料を含浸させ、次いで冷却固化することによって調製することができる。
【００４０】
ここで洗浄料の加温条件は、洗浄料が溶融して液状になる温度であれば特に制限されない。通常、洗浄料の融点（５０〜３５０℃）前後またはそれ以上の温度を挙げることができる。人造軽石の浸漬温度は、洗浄料が溶融状態を保持する温度であれば特に制限されない。通常、洗浄料の融点（５０〜３５０℃）前後またはそれ以上の温度を挙げることができる。なお浸漬時間は、洗浄料が本発明の人造軽石に含浸されることを限度に特に制限されない。通常３０秒間〜１時間、好ましくは１分間〜１５分間を例示することができる。固化条件は、洗浄料が固化する温度条件下に配置しておけばよく、具体的には、常温以下、具体的には略２５℃以下の条件下に配置されることが好ましい。
【００４１】
【発明の効果】
本発明の人造軽石は、皮膚洗浄具としての使用に耐えうる強度（耐破砕性と耐摩耗性）を備え、しかも軽石内部から表面にかけて全体に亘って形成された連続または独立した孔により、洗浄料を保有し、保有した洗浄料を使用に際して溶出することができるという特徴を備えている。このため、本発明の人造軽石は、洗浄料含浸軽石を調製する原料軽石として有効に使用することができる。さらに本発明の人造軽石は、産業廃棄物であるフライアッシュ、珪藻土（コンロ及び断熱レンガ製造時に排出される珪藻土）、木くず、籾殻またはコーヒー滓等の焼成成分を利用して調製できるため、安価に製造することができるとともに産業廃棄物の有効利用という観点からも有用である。
【００４２】
さらに、本発明の洗浄料含浸軽石は、表面の孔による凹凸により垢擦り及び角質除去効果に優れるとともに、内部に洗浄料を保有しているため、洗浄使用時に洗浄料が溶出する。このため、従来より角質除去具として用いられている軽石よりも肌を滑らかに擦ることができ、よりマイルドな使用感で角質を除去することができる。さらに、洗浄料を含有することにより孔内でのカビや微生物の繁殖を抑制することができ、より衛生的な洗浄具（角質除去具）として提供することができる。
【００４３】
【実施例】
以下、実施例を挙げて本発明をより詳細に説明する。ただし、本発明はこれらの実施例によって限定されることはない。なお、下記の実施例において特に言及する場合を除いて、％とは重量％を、また部とは重量部を意味するものとする。
【００４４】
実施例１〜４
表１に記載の組成からなる軽石を調製した。具体的には、フライアッシュ（組成ＳｉＯ_２　４５．６％、Ａｌ_２Ｏ_３　３１．８３％、Ｆｅ_２Ｏ_３　５．２５％；バルーン孔径０．２〜３０μｍ；タッピング密度０．２〜０．４ｇ／ｃｍ^３）、珪藻土、粘土、有機質材料及び水を表１に記載する配合割合で混合し、石鹸の形状を有する金型に充填して、４０ｇｆ／ｃｍ^２で加圧して圧縮成形した。金型から取り出した成形物を、次いで電気炉に入れて、１２００℃で２０時間、焼成した。得られた人造軽石について、重量、圧縮強さ、見掛気孔率を調べた。なお、圧縮強さは「耐火レンガの圧縮強さの試験方法」ＪＩＳ　　Ｒ２２０６、に従って測定し、また見掛気孔率は「耐火れんがの見掛気孔率・吸水率・比重の測定方法」ＪＩＳ　Ｒ　２２０５−１９９２に従って測定した。結果を表１に示す。
【００４５】
【表１】

【００４６】
得られた人造軽石に下記の処方からなる洗浄料を含浸させて、洗浄料含有軽石を調製した。なお、この洗浄料は、２５℃で固体状を、６５℃で液体状を呈するものである。具体的には、下記の成分を容器の中で混合して、８０℃に加温して液状にし、該洗浄溶液中に上記軽石（実施例１〜４）をいれて、２分間浸漬放置した（８０℃）。２分後、軽石を取り出し、室温（略２５℃）で固化させて洗浄料含有軽石を調製した（実施例１’〜４’）。
【００４７】
＜洗浄料処方＞
パルミチン酸ナトリウム　　　　　　　　　　　　２２（％）
ステアリン酸トリエタノールアミン　　　　　　　１２
Ｎステロイル−Ｌ−グルタミン酸ジナトリウム　　１５
グリセリン　　　　　　　　　　　　　　　　　　　６
エタノール　　　　　　　　　　　　　　　　　　１６
ショ糖　　　　　　　　　　　　　　　　　　　　１０
水　　　　　　　　　　　　　　　　　　　　　　１９　　　
合　計　　　　　　　　　　　　　　　　　　　１００　％。
【００４８】
得られた洗浄料含有軽石（実施例１’、２’、３’及び４’）について、（１）洗浄料含浸性、（２）洗浄料保持力（洗浄料の滲出性）及び（３）角質掻き取り性について評価した。
【００４９】
（１）　洗浄料含浸性
洗浄料含浸性は、下式により軽石１００重量％に対する含浸洗浄料の割合（含浸％）を算出する方法と、得られた洗浄料含有軽石を中央で割りその断面から軽石の気孔中の洗浄料の充填程度を目視により評価する方法（目視含浸性）との２つの方法により評価をした。
【００５０】
【数３】

【００５１】
なお、目視含浸性の評価は下記の基準に従って行った。
＜評価基準＞
○：洗浄料の含浸％が７０％以上
△：洗浄料の含浸％が５０％以上７０％未満
×：洗浄料の含浸％が５０％未満。
【００５２】
（２）　洗浄料保持力（洗浄料の滲出性）
洗浄料含有軽石の洗浄料保持力（洗浄料の滲出性）は、洗浄料含有軽石を水に濡らし、ガラス瓶に入れ、４０℃、７５ＲＨ％条件下で２４時間放置した後の該軽石からの洗浄料の滲み出しを下記の基準に従って目視確認し、評価した。
＜評価基準＞
○：軽石の表面に、洗浄料の滲み出しが殆ど見られない
△：軽石の表面に、洗浄料の滲み出しがやや見られる
×：軽石の表面に、洗浄料の滲み出しがかなり見られる。
（３）　角質掻き取り性
洗浄料含有軽石を実際にパネラー１０名にかかとの角質除去に使用してもらい、下記の基準に従って評価してもらった。
＜評価基準＞
１：角質除去効果あり
２：角質除去効果ややあり
３：どちらともいえない
４：角質除去効果はあまりない
５：角質除去効果なし。
【００５３】
これらのパネラーの評価を総計して、下記の基準により洗浄料組成物含有多孔質材の角質掻き取り性を評価した。
＜総合評価基準＞
○：１及び２と回答した人数が全体の７０％以上
△：１及び２と回答した人数が全体の５０％以上７０％未満
×：１及び２と回答した人数が全体の５０％未満。
【００５４】
結果を表２に示す。
【００５５】
【表２】

【００５６】
表２から分かるように、実施例１’から４’の洗浄料含有軽石は、優れた洗浄料含浸性、洗浄料保持力及び角質掻き取り性を備えており、角質除去具として有用であることが確認された。
【００５７】
実施例５〜８
実施例１〜４で得られた人造軽石に、それぞれ下記の処方からなる洗浄料を含浸させて、洗浄料含有軽石を調製した（実施例５〜８）。なお、この洗浄料は、常温（２０℃）で固体状を２５０〜３００℃で液体状を呈するものである。具体的には、下記の成分を容器の中で混合して、３００℃に加温して液状にし、該洗浄溶液中に上記軽石（実施例１〜４）をいれて、２分間浸漬放置した（３００℃）。２分後、軽石を取り出し、室温（略２５℃）で固化させて洗浄料含有軽石を調製した。
【００５８】
＜洗浄料処方＞
ステアリン酸ナトリウム　　　　　　　　４０．００（％）
パルミチン酸ナトリウム　　　　　　　　４２．００
塩化ナトリウム　　１５　　　　　　　　　　　　　　　　　　０．２０
ＥＤＴＡ・２Ｎａ　　　　　　　　　　　　　　　　　　　　　　　０．０５
グリセリン　　　　　　　　　　　　　　　０．７５
水　　　　　　　　　　　　　　　　　　１７ ． ００　　　
合　計　　　　　　　　　　　　　　　１００．００　％[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing artificial pumice and an artificial pumice obtained by the method. Further, the present invention relates to an artificial pumice containing a cleaning agent and a method for producing the same.
[0002]
[Prior art]
Conventionally, luff scourers and pumice stones have been used as cleaning tools for removing scaling and skin keratin. Among them, pumice is a porous body containing innumerable pores formed by consolidation of acidic magma, and has an excellent effect of scraping off keratin, but the feeling of use is poor because the skin contact is too strong In addition, there is a problem that excessive scraping may cause rough skin and scratches. For this reason, many artificial pumice stones and pumice scrubbers with gentle skin contact have recently been proposed. For example, (1) a natural raw material such as shirasu is heated and foamed to form a balloon, which is compression-molded, and (2) a mixture of a powder of a natural pumice material and a resin agent such as styrene foam is compression-molded. And (3) a mixture of a natural pumice material powder and a styrene resin, which is filled into a mold having a predetermined shape, and fired at the same time as firing to form pores by burning the styrene resin. be able to.
[0003]
[Problems to be solved by the invention]
However, both conventional pumice and artificial pumice have no antimicrobial properties themselves, and because of their use, they leave dirt and fallen skin in the pores. Problem.
[0004]
An object of the present invention is to provide an artificial pumice that is relatively gentle on the skin while maintaining the same keratin scraping properties as conventional pumice. Further, the present invention provides artificial pumice which is useful as a raw material of a detergent-containing pumice which contains a detergent therein and which can remove keratin with a milder feeling of use. A further object of the present invention is to provide a detergent-containing pumice prepared using the artificial pumice as a raw material. The detergent-containing pumice is used when the detergent is eluted during use and is excellent in feeling of use, and since it has antibacterial properties, the growth of mold and fungi can be suppressed and the pumice can be kept hygienic.
[0005]
[Means for Solving the Problems]
The present inventors have conducted intensive studies in order to develop an artificial pumice that has solved the above-mentioned problems.As a result, a molded product prepared by mixing and mixing flour ash, diatomaceous earth, viscosity and a calcination component in a predetermined ratio, It has been found that the porous body obtained by firing has the desired properties of the present invention.
[0006]
The present invention has been developed based on such knowledge, and specifically includes the following embodiments.
Item 1. The calcination component is 10 to 40% by weight based on 100% by weight of a composition containing 35 to 60% by weight of fly ash, 35 to 60% by weight of diatomaceous earth, and 3 to 30% by weight of clay. %. A method for producing artificial pumice, which comprises a step of blending and mixing at a ratio of%, a step of molding the obtained mixture, and a step of firing the obtained molded article.
Item 2. 10 to 40% by weight of the calcination component is externally added to 100% by weight of a composition containing 35 to 60% by weight of fly ash, 35 to 60% by weight of diatomaceous earth, and 3 to 30% by weight of clay. % Artificial pumice prepared through a step of blending and mixing at a ratio of%, a step of molding the obtained mixture, and a step of firing the obtained molded article.
Item 3. Item 4. An artificial pumice according to Item 2, which contains a cleaning agent.
Item 4. Item 4. The method for producing an artificial pumice according to Item 3, comprising a step of impregnating the artificial pumice with a liquid detergent and a step of cooling and solidifying the artificial pumice according to Item 2.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
(1) Artificial pumice and its production method The artificial pumice of the present invention is obtained by mixing fly ash, diatomaceous earth, clay and a calcination component, molding and then calcination.
[0008]
Fly ash is spherical fine particles contained in high-temperature combustion gas generated from a boiler of a coal-fired power plant, and is fine powder collected by a dust collector. In the present invention, fly ash can be widely used regardless of whether or not the quality conforms to JIS A 6201. According to JIS, fly ash has specific gravity ≧ 1.95, specific surface area (cm ² / g) ≧ 2400, compressive strength ratio (%) 28d ≧ 60, 91d ≧ 70, chemical component (%) ignition loss ≦ 5, it is specified that the moisture content ≦ 1 and the SiO ₂ ≧ 45. According to Shigeyoshi Nagataki et al. (Cement and Concrete, No. 472, 14 (1986)), it was described that the physical properties and chemical composition of 30 places of fly ash were in the following range: specific gravity 2.46 to 2.02, specific surface area (cm ² / g) 5180 to 2900, unit water amount ratio (%) 102 to 97, compressive strength ratio (%) 28d 77.7 to 63.8, 91d 92.6 to 67.8, chemical composition (%) loss on ignition from 11.3 to 1.4, moisture _{0.3~0.0, SiO 2 74.4~39.8, Al 2} O 3 34.6~18. _{5, Fe 2 O 3 17.2~1.4,} CaO 10.0~0.3.
[0009]
As an example of the fly ash used in the present invention, the SiO ₂ 37-55 wt% to the fly ash 100 wt%, the _Al 2 _{O 3} 27 to 37 wt%, and _Fe 2 _{O 3} 4 to 6.5 those containing at a ratio of weight percent, preferably those containing SiO ₂ 40 to 50 wt%, the _Al 2 _{O 3} 30 to 33 wt%, and _Fe 2 _{O 3} in a proportion of 4.5 to 5.5 wt% Can be mentioned. The fly ash used in the present invention preferably has a balloon pore diameter in the range of 0.2 to 30 μm, preferably 0.5 to 15 μm. Further, the tapping density is preferably in the range of 0.2 to 0.4 g / cm ³ . The balloon is a spherical particle having a hollow inside, and the tapping density is a bulk specific gravity of the particle.
[0010]
Diatomaceous earth is gray or white soil formed by the accumulation of remains of unicellular algae called diatoms. In general, it is known that the porous body contains SiO ₂ at a rate of 78 to 94% and Al ₂ O ₃ at a rate of 0.3 to 15%, and has a high adsorptivity and a high hygroscopicity (water absorbency). In the present invention, what is called diatomaceous earth can be widely used irrespective of the origin, freshwater and seawater, untreated, purified and calcined. It is also possible to use diatomaceous earth fired powder that is discharged in the manufacturing process of a stove or a fire-resistant brick. The diatomaceous earth used in the present invention preferably has a tapping density in the range of 0.25 to 0.35 g / cm ³ .
[0011]
The clay used in the present invention is not particularly limited as long as it has plasticity and fire resistance. Preferably, it has fire resistance to firing at 1000 ° C. or higher. Examples of these clays include kaolinite, dip, kaolinite, dickite, halloysite, pyrophyllite, or clay mainly composed of aluminum clay minerals.
[0012]
Specifically, the clay used in the present invention includes primary clay such as kaolin, and secondary clay such as Kibushi clay and Frogme clay. Preferably, it is Kibushi clay. In addition, as constituent components of clay, SiO ₂ , Al ₂ O ₃ , Fe ₂ O ₃ , TiO ₂ , CaO, MgO, K ₂ O, and Na ₂ O are known.
[0013]
As for the mixing ratio of these fly ash, diatomaceous earth and clay, when the total amount of these three components is 100% by weight (dry weight, the same applies hereinafter), fly ash is 35 to 60% by weight, preferably 40 to 55%. % By weight, more preferably 40 to 50% by weight; diatomaceous earth 35 to 60% by weight, preferably 40 to 55% by weight, more preferably 40 to 50% by weight; clay 3 to 30% by weight, preferably 4 to 20% by weight , More preferably 5 to 10% by weight.
[0014]
Here, the blending ratio (dry weight ratio) of fly ash and diatomaceous earth is such that diatomaceous earth is 58 to 170 parts by weight, preferably 71 to 140 parts by weight, and more preferably 100 parts by weight, based on 100 parts by weight of hula ash. Can be mentioned. If the blending ratio of diatomaceous earth is significantly less than 58 parts by weight with respect to 100 parts by weight of fly ash, the mechanical strength after molding becomes weak, handling becomes difficult, and sintering at a high temperature is not preferred, which is not preferable. On the other hand, if the blending ratio of diatomaceous earth is significantly greater than 170 parts by weight with respect to 100 parts by weight of fly ash, the diatomaceous earth is likely to adhere to the molding die during molding, making demolding difficult, and also causing pumice stones to be easily cracked. .
[0015]
Further, as a compounding ratio (dry weight ratio) of the clay to the mixture of fly ash and diatomaceous earth, the clay is 3 to 43 parts by weight, preferably 3 to 18 parts by weight, based on 100 parts by weight of the mixture of fly ash and diatomaceous earth. A preferred ratio is 3 to 9 parts by weight. If the proportion of the clay is significantly less than 3 parts by weight with respect to 100 parts by weight of the mixture of fly ash and diatomaceous earth, molding becomes difficult, which is not preferable. On the other hand, if the proportion of the clay greatly exceeds 43 parts by weight with respect to 100 parts by weight of the mixture of fly ash and diatomaceous earth, the apparent porosity of pumice is undesirably reduced.
[0016]
The calcined component used in the present invention means a solid component which burns and disappears in the calcining step of the production of the artificial pumice of the present invention. Specifically, any solid component that burns and disappears by firing at 1000 ° C. or higher may be used, and examples thereof include various organic materials such as sawdust, rice husk, plastic, seeds, and coffee grounds. From the viewpoint of effective use of waste, rice hulls, crushed PET, seeds, coffee grounds, and more preferably coffee grounds are preferred. These organic materials preferably have a particle size (diameter) in the range of 0.1 to 1.5 mm, preferably 0.1 to 1.2 mm, more preferably 0.1 to 0.8 mm. It is desirable to be within the range, and if necessary, it is preferable to use it after pulverizing it to the particle size.
[0017]
These calcined components can be used in a proportion of 10 to 40 parts by weight (dry weight) based on 100 parts by weight of the dry weight of the above-mentioned mixture of fly ash, diatomaceous earth and clay. Preferably it is 20 to 40 parts by weight, more preferably 27 to 33 parts by weight. If the amount is less than 10 parts by weight, the apparent porosity of the artificial pumice prepared by firing is reduced, so that a desired amount of detergent cannot be carried. If the amount is more than 40 parts by weight, the pumice raw material is mixed. In addition, the plasticity is lowered and molding becomes difficult, and the apparent porosity of the artificial pumice prepared by sintering becomes high and the desired strength is not obtained.
[0018]
The artificial pumice of the present invention can be prepared by mixing the above components in the above ratio, molding, and firing. In addition, when mixing each component, water can be added as needed. When water is added when mixing the above components, the amount of the water to be added is not particularly limited, but for example, 30 to 55 parts by weight based on 100 parts by weight of a dry weight of a mixture of fly ash, diatomaceous earth and clay. , Preferably 30 to 45 parts by weight, more preferably 35 to 40 parts by weight.
[0019]
The molding is not particularly limited, such as a method of filling and mixing a pumice raw material composition prepared by mixing into a molding die (press molding method), a method of extrusion molding, and a method of cast molding. Can be used. Preferably, it is a press molding method. The molding form is not particularly limited, and may be a wide range such as a soap type (elliptical sphere), a football shape, a spherical shape, a cubic shape, and a plate shape.
[0020]
The calcination can be carried out by burning the formed pumice raw material composition at a temperature of 1000 to 1400 ° C, preferably 1000 to 1300 ° C, for at least 15 hours, preferably 18 to 22 hours. In the firing, the previously formed pumice raw material composition may be subjected to a drying step.
[0021]
The artificial pumice thus prepared has continuous or independent pores formed by the burning and disappearance of the calcination component, in addition to the pores inherent in the diatomaceous earth used as a raw material, from the inside to the entire surface of the pumice stone. Have. In addition, the pores formed by the calcined component communicate with the raw material components, particularly the micropores originally possessed by diatomaceous earth, and as a result, artificial artificial pumice is in a state in which continuous or independent large and small pores are stretched in all directions. I have. For this reason, the artificial pumice of the present invention is easily impregnated with the cleaning solution from the inside to the surface, and has a property that it can be gradually eluted without being immediately eluted and escaped because it enters micropores. . Although not particularly limited, the pumice of the present invention preferably has an apparent porosity of 5 to 80%, preferably 30 to 70%, and more preferably 40 to 60%.
[0022]
The apparent porosity is a physical property indicating a quantitative relationship between a void portion and a substance in the following formula.
[0023]
(Equation 1)

[0024]
In the present invention, the apparent porosity can be determined by the following equation in accordance with JIS R 2205-1992 "Method for measuring apparent porosity, water absorption, and specific gravity of refractory brick".
[0025]
(Equation 2)

[0026]
Here, the mass of the dried sample, the mass of the saturated sample in water, and the mass of the saturated sample can all be measured in accordance with the method specified in JIS R 2205-1992.
[0027]
Furthermore, it is desirable that the artificial pumice of the present invention has a compressive strength of 50 kg or more and the minimum crushing resistance and wear resistance required for pumice. Preferably it is 60 kg or more, more preferably 85 kg or more. Here, the compressive strength can be measured according to JIS R2206 "Testing method for compressive strength of refractory bricks", and refers to a value measured by the method.
[0028]
Therefore, the present invention can be used as a pumice as it is for removing slime and exfoliation of the skin, and can also be provided as a detergent-containing artificial pumice in a state impregnated with a detergent.
[0029]
(2) Detergent-Containing Artificial Pumice The present invention provides a detergent-containing artificial pumice.
[0030]
The artificial pumice containing the detergent of the present invention can be prepared by immersing the above-described pumice of the present invention in a liquid prepared in a liquid state, impregnating the same, and then cooling and solidifying.
[0031]
The cleaning agent used here contains a cleaning component, and is not particularly limited as long as the above preparation is possible.
[0032]
The cleaning agent used in the present invention can contain one surfactant alone or a combination of two or more surfactants as a cleaning component. The surfactant is not particularly limited, and any of a cationic surfactant, an anionic surfactant, a nonionic surfactant, and an amphoteric surfactant can be used.
[0033]
Further, the cleaning agent may contain a bactericidal / antibacterial agent, a foaming agent, a viscosity adjuster, a fragrance, a coloring agent, a pH adjuster, a deodorant / deodorant, and a diluent as long as the above properties are not impaired. Good.
[0034]
Examples of the bactericidal and antibacterial agents include quaternary ammonium salt-type cationic surfactants such as alkyltrimethylammonium chloride and alkylbenzyldimethylammonium chloride; N-alkylbetaines and alkylbetaines (eg, lauryl dimethylaminoacetic acid betaine, coconut oil) Betaine-type amphoteric surfactants such as alkyl betaine, lauric amide propyl betaine, coconut oil fatty acid propyl betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, and the like.
[0035]
As specific disinfectants, alkyltrimethylammonium chloride includes lauryltrimethylammonium chloride and behenyltrimethylammonium chloride, and alkylbenzyldimethylammonium chloride includes dimyristyldimethylammonium chloride and distearyldimethylammonium chloride.
[0036]
Examples of the foaming agent include sodium lauryl sulfate, diethanolamide laurate and fatty acid salts having 12 to 18 carbon atoms, specifically, laurate, stearate, palmitate and myristate. Here, examples of the salt of the fatty acid include alkali metal salts of fatty acids such as sodium and potassium, and fatty acid zinc.
[0037]
Further, as a viscosity modifier, glycerin, castor oil, squalane, palmitic acid, white petrolatum, beeswax, liquid paraffin, 1,3-butylene glycol, etc .; As a pH regulator, hydrochloric acid, acetic acid, citric acid, sulfuric acid, hydroxylated Sodium and ammonia; and examples of the deodorant and deodorant include natural deodorants such as catechin and flavonoids and betaine deodorants such as betaine lauryldimethylaminoacetate. Examples of the diluent include water and alcohol such as ethanol.
[0038]
The cleaning agent used in the present invention has such a property that it can be made liquid by heating, and solidifies by cooling. More specifically, the cleaning agent has a solid state at 25 ° C. or lower, preferably 35 ° C. or lower, more preferably 40 ° C. or lower, still more preferably 45 ° C. or lower, and is heated at a temperature in the range of 50 to 300 ° C. It is preferable that the liquid state be obtained by heating at a temperature in the range of preferably 50 to 200 ° C, more preferably 50 to 150 ° C, further preferably 50 to 100 ° C, and still more preferably 55 to 80 ° C.
[0039]
The detergent-containing artificial pumice of the present invention is preferably prepared by heating the above-mentioned detergent to be in a liquid form, immersing the artificial pumice of the present invention in the liquid, impregnating the detergent, and then cooling and solidifying. it can.
[0040]
Here, the heating condition of the cleaning agent is not particularly limited as long as the temperature is such that the cleaning agent is melted and becomes liquid. Usually, the temperature can be about the melting point (50-350 ° C.) of the cleaning agent or higher. The immersion temperature of the artificial pumice is not particularly limited as long as the cleaning material maintains a molten state. Usually, the temperature can be about the melting point (50-350 ° C.) of the cleaning agent or higher. The immersion time is not particularly limited as long as the cleaning material is impregnated with the artificial pumice of the present invention. The time is usually 30 seconds to 1 hour, preferably 1 minute to 15 minutes. The solidification condition may be set under a temperature condition at which the detergent is solidified, and specifically, is preferably set at a normal temperature or lower, specifically, approximately 25 ° C. or lower.
[0041]
【The invention's effect】
The artificial pumice of the present invention has sufficient strength (crush resistance and abrasion resistance) to withstand use as a skin cleansing tool, and is further cleaned by continuous or independent holes formed entirely from the inside to the surface of the pumice. It has the characteristic that the detergent is retained and the retained detergent can be eluted when used. For this reason, the artificial pumice of the present invention can be effectively used as a raw material pumice for preparing a detergent impregnated pumice. Furthermore, the artificial pumice of the present invention can be prepared using baked components such as industrial waste such as fly ash, diatomaceous earth (diatomaceous earth discharged during the production of stoves and insulating bricks), wood chips, chaff or coffee slag, and is inexpensive. It can be manufactured and is useful from the viewpoint of effective use of industrial waste.
[0042]
Further, the detergent-impregnated pumice of the present invention is excellent in abrasion and exfoliating effect due to unevenness due to pores on the surface, and since the detergent is retained inside, the detergent is eluted when used for washing. For this reason, the skin can be rubbed more smoothly than pumice used conventionally as a keratin removal tool, and keratin can be removed with a milder feeling of use. Furthermore, by containing a cleaning agent, it is possible to suppress the growth of mold and microorganisms in the pores, and it is possible to provide a more hygienic cleaning tool (keratin removal tool).
[0043]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited by these examples. Unless otherwise specified in the examples below,% means% by weight, and part means parts by weight.
[0044]
Examples 1-4
Pumice having the composition shown in Table 1 was prepared. Specifically, fly ash (composition SiO ₂ 45.6%, Al ₂ O ₃ 31.83%, Fe ₂ O ₃ 5.25%; balloon pore diameter 0.2 to 30 μm; tapping density 0.2 to 0. 4 g / cm ³ ), diatomaceous earth, clay, organic materials, and water were mixed at the mixing ratio shown in Table 1, filled in a mold having the shape of a soap, and compression-molded by applying a pressure of 40 gf / cm ² . The molded product removed from the mold was then placed in an electric furnace and fired at 1200 ° C. for 20 hours. The resulting artificial pumice was examined for weight, compressive strength, and apparent porosity. The compressive strength is measured according to JIS R2206, "Testing method for compressive strength of refractory bricks", and the apparent porosity is measured according to "Method for measuring apparent porosity, water absorption, and specific gravity of refractory brick", JIS R 2205. Measured according to -1992. Table 1 shows the results.
[0045]
[Table 1]

[0046]
The resulting artificial pumice was impregnated with a detergent having the following formulation to prepare a detergent-containing pumice. In addition, this washing | cleaning material shows a solid form at 25 degreeC, and a liquid state at 65 degreeC. Specifically, the following components were mixed in a container, heated to 80 ° C. to make a liquid, the pumice stones (Examples 1 to 4) were placed in the cleaning solution, and left immersed for 2 minutes. (80 ° C). Two minutes later, the pumice was taken out and solidified at room temperature (approximately 25 ° C.) to prepare a pumice containing detergent (Examples 1 ′ to 4 ′).
[0047]
<Washing formula>
Sodium palmitate 22 (%)
Triethanolamine stearate 12
N-Steroyl-L-glutamate disodium 15
Glycerin 6
Ethanol 16
Sucrose 10
Water 19
100% in total.
[0048]
Regarding the obtained detergent-containing pumice (Examples 1 ′, 2 ′, 3 ′ and 4 ′), (1) detergent impregnation, (2) detergent retention (leaching of detergent) and (3) The keratin scraping property was evaluated.
[0049]
(1) Detergent impregnating property Detergent impregnating property is calculated by calculating the ratio of impregnated detergent to 100% by weight of pumice (impregnation%) according to the following formula, dividing the obtained detergent-containing pumice at the center, and calculating the impregnating property from the cross section. Evaluation was made by two methods: a method of visually evaluating the degree of filling of the pores of the pumice with the detergent (visual impregnation).
[0050]
[Equation 3]

[0051]
The visual impregnation was evaluated according to the following criteria.
<Evaluation criteria>
：: Impregnation% of cleaning agent is 70% or more Δ: Impregnation% of cleaning agent is 50% or more and less than 70% X: Impregnation% of cleaning agent is less than 50%.
[0052]
(2) Cleaning agent holding power (exudability of cleaning agent)
The cleaning agent holding power (leaching property of the cleaning agent) of the cleaning agent-containing pumice is measured by washing the cleaning agent-containing pumice stone in water, placing it in a glass bottle, and allowing it to stand at 40 ° C. and 75 RH% for 24 hours. The exudation of the material was visually confirmed and evaluated according to the following criteria.
<Evaluation criteria>
：: Almost no seepage of the cleaning agent is observed on the surface of the pumice stone. Δ: Exudation of the cleaning agent is slightly observed on the surface of the pumice stone. X: Exudation of the cleaning agent is considerably observed on the surface of the pumice stone.
(3) Keratin scraping property Pumice containing detergent was actually used by 10 panelists for exfoliation of heels and evaluated according to the following criteria.
<Evaluation criteria>
1: Exfoliating effect is present 2: Exfoliating effect is slightly present 3: Neither is possible 4: Exfoliating effect is not so high 5: Exfoliating effect is not present.
[0053]
The evaluations of these panelists were totaled, and the keratin scraping property of the cleaning composition-containing porous material was evaluated according to the following criteria.
<Comprehensive evaluation criteria>
○: The number of persons who answered 1 and 2 was 70% or more of the whole △: The number of persons who answered 1 and 2 was 50% or more and less than 70% of the whole ×: The number of persons who answered 1 and 2 was less than 50% of the whole.
[0054]
Table 2 shows the results.
[0055]
[Table 2]

[0056]
As can be seen from Table 2, the detergent-containing pumice of Examples 1 'to 4' has excellent detergent impregnation, detergent retention and exfoliating properties, and is useful as an exfoliating tool. Was confirmed.
[0057]
Examples 5 to 8
The artificial pumice obtained in each of Examples 1 to 4 was impregnated with a cleaning agent having the following formulation to prepare a cleaning agent-containing pumice (Examples 5 to 8). In addition, this washing | cleaning material shows a solid form at normal temperature (20 degreeC), and a liquid form at 250-300 degreeC. Specifically, the following components were mixed in a container, heated to 300 ° C. to make a liquid, the pumice stones (Examples 1 to 4) were placed in the cleaning solution, and left immersed for 2 minutes. (300 ° C). Two minutes later, the pumice was taken out and solidified at room temperature (approximately 25 ° C.) to prepare a detergent-containing pumice.
[0058]
<Washing formula>
Sodium stearate 40.00 (%)
Sodium palmitate 42.00
Sodium chloride 15 0.20
EDTA ・ 2Na 0.05
Glycerin 0.75
Water 17 . 00
Total 100.00%

Claims (4)

Percentage of the calcined component is 10 to 40% by weight based on 100% by weight of a composition containing 35 to 60% by weight of fly ash, 35 to 60% by weight of diatomaceous earth, and 3 to 30% by weight of clay. A process for producing artificial pumice, comprising a compounding step, a mixing step, a forming step, and a firing step. Percentage of the calcined component is 10 to 40% by weight based on 100% by weight of a composition containing 35 to 60% by weight of fly ash, 35 to 60% by weight of diatomaceous earth, and 3 to 30% by weight of clay. An artificial pumice prepared through a compounding step, a mixing step, a forming step, and a firing step. The artificial pumice according to claim 2, which contains a cleaning agent. The method for producing an artificial pumice according to claim 3, further comprising a step of immersing the artificial pumice according to claim 2 in a liquid detergent, impregnating the detergent, and cooling and solidifying the artificial pumice.