JP2007291585A - Filament-like palygorskite powder excellent in heat resistance, chemical resistance, abrasion resistance and the like, and method for producing the same - Google Patents
Filament-like palygorskite powder excellent in heat resistance, chemical resistance, abrasion resistance and the like, and method for producing the same Download PDFInfo
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Description
本発明は、従来その特性により様々な分野で使用されてきたが、近時はその発癌性の危険から全面的に使用禁止とされている石綿（アスベスト）の代替品として優れた特性を備え、多くの工業的諸分野において応用可能な柔軟性のある無機繊維としての新規な物質とその製造方法を提案しようとするものである The present invention has been used in various fields due to its properties in the past, but recently it has excellent properties as a substitute for asbestos (asbestos), which has been completely banned from its carcinogenic danger, It is intended to propose a novel material as a flexible inorganic fiber applicable in many industrial fields and its production method.
石綿（アスベスト）はその優れた耐熱性、耐薬品性、耐摩耗性などの特性から数多くの分野や用途に利用されていたが、近時その発癌性物質であることが問題となりその使用を厳しく制限される物質になっている。
そこで、石綿（アスベスト）の代替材料としてその繊維に柔軟性があり特性の優れたものとして繊維状のセピオライトがあるが、その中には微量であるが石綿（アスベスト）の一種である繊維状トレモライトが含まれることがあり、その混入量を定量する手法として以下の文献技術が存在している。
Therefore, as an alternative material for asbestos (asbestos), there is a fibrous sepiolite that is flexible and has excellent properties. Among them, a small amount of fibrous tremolite is a kind of asbestos. The following literature techniques exist as a method for quantifying the amount of contamination.
上記したように、石綿（アスベスト）は安全性の観点から、現在では工業的用途に使用することが不可能であり、その代替材料が求められるが、繊維状セピオライトにも微量の石綿（繊維状トレモライト）が含まれることがあるので、製品中の石綿（アスベスト）含有量規制値が０．１％以下のように強化されると実質的に使用困難である。 As mentioned above, asbestos (asbestos) is currently impossible to use for industrial applications from the viewpoint of safety, and an alternative material is required. However, a small amount of asbestos (fibrous) is also required for fibrous sepiolite. Tremorite) may be contained, and asbestos (asbestos) content regulation value in the product is strengthened to 0.1% or less, it is substantially difficult to use.
また、パリゴルスカイトはその優れた特性を生かして工業分野や農業分野などで現在広く利用されているが、一般に肉眼ではその繊維形状を確認することができない短繊維状であり、石綿（アスベスト）のようにその繊維状形態に由来した多くの機能性を発揮する材料の代替とすることはできないものである。
ここで、パリゴルスカイトとは含水アルミニウム−マグネシウム珪酸塩鉱物であり、その俗称としては、アタパルジャイト、凹凸棒などの名称がある。In addition, palygorskite is currently widely used in the industrial and agricultural fields by taking advantage of its excellent characteristics. However, it is generally a short fiber that cannot be visually confirmed by the naked eye, such as asbestos. In addition, it cannot be used as a substitute for a material that exhibits many functions derived from its fibrous form.
Here, the palygorskite is a hydrated aluminum-magnesium silicate mineral, and its common names include attapulgite and concavo-convex bars.
したがって、危険性により使用の制限を受けている石綿（アスベスト）の有効な代替材料としての長繊維状のパリゴルスカイトを得る事が期待されるのである。 Therefore, it is expected to obtain long-fiber palygorskite as an effective substitute material for asbestos (asbestos), which is restricted in use due to danger.
本発明は、上記したような課題を解決するために研究と検討を重ねた結果創造されたものであり、一般に短繊維状であったパリゴルスカイトを長繊維状の粉末材料とすること及びその製造方法を確立し、それによって高性能な石綿（アスベスト）代替の新製品を実現したもので、具体的には以下の如くである。 The present invention was created as a result of repeated research and examination to solve the above-described problems, and a palygorskite that is generally short fiber-like is used as a long-fiber-like powder material and a method for producing the same. As a result, a new product that replaces high-performance asbestos (asbestos) has been realized. Specifically, it is as follows.
（１）不純物としての石綿を含んでいない長繊維状パリゴルスカイトの原石をその結晶構造や繊維形態を破壊しないように解砕して得られる繊維状粉末であり、純度が５０重量％以上、好ましくは７０重量％以上であることにより、危険性により使用の制限を受けている石綿の代替品として利用できることを特徴とする耐熱性、耐薬品性、耐摩耗性などに優れた長繊維状パリゴルスカイト粉末。 (1) A fibrous powder obtained by crushing a raw fibrous palygorskite that does not contain asbestos as an impurity so as not to destroy its crystal structure and fiber form, and has a purity of 50% by weight or more, preferably A long-fiber palygorskite powder excellent in heat resistance, chemical resistance, wear resistance and the like, characterized by being able to be used as an alternative to asbestos whose use is restricted due to danger when it is 70% by weight or more.
（２）単結晶のアスペクト比が１０以上であるパリゴルスカイトを５０重量％以上、好ましくは７０重量％以上含んでその主成分としていることを特徴とする前記（１）項に記載の耐熱性、耐薬品性、耐摩耗性などに優れた長繊維状パリゴルスカイト粉末。 (2) The heat resistance and resistance as described in the above item (1), wherein the main component is a palygorskite having a single crystal aspect ratio of 10 or more, containing 50% by weight or more, preferably 70% by weight or more. Long fiber palygorskite powder with excellent chemical and wear resistance.
（３）長繊維状パリゴルスカイトの原石を、衝撃又は圧潰方式によって１０ｍｍ以下の塊にまで粗粉砕し、その後剪断又は摩擦作用の解砕方式による粉砕によって繊維長１０ｍｍ以下の繊維（石綿４クラスに相当）に解砕し、さらにこれを分級機にかけて粗粒部を除去することで純度を５０重量％以上、好ましくは７０重量％以上とすることで前記（１）項又は（２）項に記載の長繊維状パリゴルスカイト粉末を得るようにしたことを特徴とする耐熱性、耐薬品性、耐摩耗性などに優れた長繊維状パリゴルスカイト粉末の製造方法。 (3) A long fiber-like palygorskite ore is coarsely pulverized to a lump of 10 mm or less by impact or crushing method, and then a fiber having a fiber length of 10 mm or less (corresponding to 4 class of asbestos) by crushing by a shearing or frictional crushing method ), And by applying this to a classifier to remove coarse particles, the purity is set to 50% by weight or more, preferably 70% by weight or more, as described in (1) or (2) above. A method for producing a long fibrous palygorskite powder excellent in heat resistance, chemical resistance, abrasion resistance, etc., characterized in that a long fibrous palygorskite powder is obtained.
長繊維状パリゴルスカイトの原石をその結晶構造や繊維形態を破壊しないように解砕して得られる繊維状粉末であり、純度が５０重量％以上、好ましくは７０重量％以上であることにより、危険性により使用の制限を受けている石綿の代替品として利用できる。つまり、不純物として石綿をまったく含んでいないことから、石綿による人体への有害作用を来たさずに十二分な性能を持った新規素材を得ることができるようになるのである。 It is a fibrous powder obtained by pulverizing a long fibrous palygorskite ore so as not to destroy its crystal structure and fiber form, and has a purity of 50% by weight or more, preferably 70% by weight or more. It can be used as a substitute for asbestos that is restricted by In other words, since asbestos is not included at all as an impurity, a new material having sufficient performance can be obtained without causing harmful effects on the human body.
単結晶のアスペクト比が１０以上であるパリゴルスカイトを５０重量％以上、好ましくは７０重量％以上含んでその主成分としていることにより、素材のサイズや形状が限定されて安定かつ高品位な新素材として精選することが可能となる。 A stable and high-grade new material with a limited size and shape of the material by containing 50% by weight or more, preferably 70% by weight or more of palygorskite having a single crystal aspect ratio of 10 or more as its main component. It becomes possible to select carefully.
長繊維状パリゴルスカイトの原石を、衝撃又は圧潰方式によって１０ｍｍ以下の塊にまで粗粉砕し、その後剪断又は摩擦作用の解砕方式による粉砕によって繊維長１０ｍｍ以下の繊維（石綿４クラスに相当）に解砕し、さらにこれを分級機にかけて粗粒部を除去することで純度を５０重量％以上、好ましくは７０重量％以上とすることで前記何れかの長繊維上パリゴルスカイト粉末を得るようにしたことにより、このような石綿（アスベスト）代用の新素材を安定且つ効率的に得る事ができるようになる。 The long-fiber palygorskite ore is coarsely pulverized into a lump of 10 mm or less by impact or crushing method, and then pulverized by a shearing or frictional crushing method to break down fibers having a fiber length of 10 mm or less (corresponding to asbestos 4 class). By pulverizing and applying this to a classifier to remove coarse particles, the purity is set to 50% by weight or more, preferably 70% by weight or more, so that any of the above-mentioned long-fiber palygorskite powder is obtained. Such a new material for asbestos substitute can be obtained stably and efficiently.
上記してきたようは本発明の具体的な実施形態の若干例を以下において説明する。
表１は、各種石綿（アスベスト）とその代替品であるセピオライトおよび本発明のパリゴルスカイトをその各種性質毎に比較して示したものである。As described above, some examples of specific embodiments of the present invention are described below.
Table 1 shows various asbestos (asbestos), sepiolite, which is a substitute for the asbestos, and the palygorskite of the present invention in comparison with the various properties.
すなわち、硬度、比重、溶解点、柔軟性、耐熱性、耐酸性、耐アルカリ性、ろ過性能、電荷、分解温度のいずれにおいてもパリゴルスカイトは石綿（アスベスト）の代替品として十二分に優れた性質を有していることが理解される。 In other words, palygorskite is an excellent substitute for asbestos in terms of hardness, specific gravity, melting point, flexibility, heat resistance, acid resistance, alkali resistance, filtration performance, charge, and decomposition temperature. It is understood that it has.
つまり、一般には短繊維状であるために石綿（アスベスト）の代替品としては不適であったパリゴルスカイトを長繊維状の粉末材料とする技術を確立したことにより、摩擦材（耐摩耗性）、ジョイントシート（不燃・耐熱性、耐薬品性）、塗料・接着剤（耐久性、増粘性）などの多くの用途に利用することができるのである。 In other words, friction materials (abrasion resistance), joints have been established by establishing technology that uses palygorskite, which is generally unsuitable as an asbestos substitute because of its short fiber shape, as a long fiber powder material. It can be used for many applications such as sheets (non-combustible, heat-resistant, chemical-resistant) and paints / adhesives (durability, thickening).
上記してきた本発明の具体的な実施例の若干を以下に説明する。
まず、長繊維状パリゴルスカイトを５０重量％以上含む原石をハンマーミル（ホソカワミクロン社製ＨＢ−１８型）で１０ｍｍ以下に粗粉砕する。
次に、せん断又は摩擦作用の解砕方式として、ピンミル（奈良機械製作所製Ｍ−５型）もしくはスーパーミクロンミル（ホソカワミクロン社製Ｍ２０２−ＮＣ型）を使用して解砕する。Some of the specific embodiments of the present invention described above will be described below.
First, an ore containing 50% by weight or more of long-fiber palygorskite is coarsely pulverized to 10 mm or less with a hammer mill (HB-18 type manufactured by Hosokawa Micron Corporation).
Next, as a crushing method of shearing or friction action, crushing is performed using a pin mill (M-5 type manufactured by Nara Machinery Co., Ltd.) or a super micron mill (M202-NC type manufactured by Hosokawa Micron Corporation).
さらに、得られた繊維状粉末を、風簸分級機（安川商事社製ＹＭ−マイクロカットＹＡＣＡ−４００Ｖ型）を用いて分級し、粗粒部分を除去して本発明の製品とすることができる。風簸分級は粒子の粒径と比重の差を利用して粗粒部分を除去することができる。
粗粒部分とは例えば１ｍｍ以上の粒径を持つ未解砕の繊維束を言うものである。Furthermore, the obtained fibrous powder can be classified using a wind-type classifier (YM-Microcut YACA-400V type manufactured by Yaskawa Shoji Co., Ltd.), and the coarse particles can be removed to obtain the product of the present invention. . In the wind classification, the coarse portion can be removed by utilizing the difference between the particle size and specific gravity of the particles.
The coarse grain portion refers to an unbroken fiber bundle having a particle diameter of, for example, 1 mm or more.
不純物の除去に関しては、ハンマーミルでの粉砕物を、例えば、１８メッシュ（目開き８５０μｍ）の篩にかけることで、不純物であるスメクタイト、カルサイト、ドロマイトなどの鉱物を除去することができ、純度７０重量％以上にすることが可能である。
また、篩以外にも、水洗、水簸なども有効である。As for the removal of impurities, minerals such as smectite, calcite, and dolomite, which are impurities, can be removed by passing the pulverized product with a hammer mill through, for example, a sieve of 18 mesh (aperture 850 μm). It is possible to make it 70% by weight or more.
In addition to sieving, water washing and water tanks are also effective.
得られた本発明製品についての電子顕微鏡写真（１２０００倍）を模式図化したものが図１に示すものである。
図から明らかなように、得られた本発明製品は条件を満足する長繊維状のパリゴルスカイト１となっており、表１に示したような優れた特性を保持しながら、一般に短繊維状であることに基づく不利を解消することで、近時その安全性問題から使用を規制されている石綿（アスベスト）の代替製品として広く工業的用途に応用できると理解できる。FIG. 1 shows a schematic diagram of an electron micrograph (12000 times) of the obtained product of the present invention.
As is apparent from the figure, the obtained product of the present invention is a long-fiber palygorskite 1 that satisfies the conditions, and generally has a short fiber shape while maintaining excellent characteristics as shown in Table 1. By eliminating the disadvantages, it can be understood that it can be widely applied to industrial applications as an alternative to asbestos, whose use has been recently restricted due to its safety issues.
以上説明してきたような本発明によれば、長繊維状のパリゴルスカイトを所定以上の純度で得て製品化することで、その優れた特性を活かした工業的応用範囲を大きく開くことが可能となる。 According to the present invention as described above, it is possible to obtain a long-fiber palygorskite with a purity of a predetermined level or more and commercialize it, thereby greatly opening up an industrial application range utilizing its excellent characteristics. .
特に、安全性問題から工業的利用が殆んど不可能となっている石綿（アスベスト）の代替品として利用することが可能となる。 In particular, it can be used as a substitute for asbestos (asbestos), which is almost impossible to industrially use due to safety issues.
したがって、多様な工業的用途への代替利用が期待され、産業上の利用可能性において非常に優れた発明であると理解されるものである。 Therefore, it can be understood that the present invention is very excellent in industrial applicability because it is expected to be used in various industrial applications.
１ 長繊維状として精選された本発明のパリゴルスカイト材料1 Palygorskite material of the present invention selected as long fiber
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965760A (en) * | 2012-11-26 | 2013-03-13 | 荣盛石化股份有限公司 | Manufacturing method of antibacterial deodorizing polyester fiber |
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| JPS5747751A (en) * | 1980-09-08 | 1982-03-18 | Nitto Boseki Co Ltd | Manufacture of mineral fiber board |
| JPH02258308A (en) * | 1989-03-31 | 1990-10-19 | Toyota Central Res & Dev Lab Inc | Production of clayey mineral incorporating easily dispersible magnesium silicate |
| JPH0328118A (en) * | 1989-05-16 | 1991-02-06 | Engelhard Corp | Manufacture of bleaching clay acid-activated using highly sensitive material clay and new bleaching clay product |
| JP2001128544A (en) * | 1999-11-09 | 2001-05-15 | Taki Chem Co Ltd | Mixed composition of ore |
| JP2001220127A (en) * | 2000-02-01 | 2001-08-14 | Agency Of Ind Science & Technol | Method for refining magnesium silicate ore containing carbonate as impurity |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56118751A (en) * | 1980-02-22 | 1981-09-17 | Takeda Chemical Industries Ltd | Method of finely classifying formite group mineral |
| JPS5747751A (en) * | 1980-09-08 | 1982-03-18 | Nitto Boseki Co Ltd | Manufacture of mineral fiber board |
| JPH02258308A (en) * | 1989-03-31 | 1990-10-19 | Toyota Central Res & Dev Lab Inc | Production of clayey mineral incorporating easily dispersible magnesium silicate |
| JPH0328118A (en) * | 1989-05-16 | 1991-02-06 | Engelhard Corp | Manufacture of bleaching clay acid-activated using highly sensitive material clay and new bleaching clay product |
| JP2001128544A (en) * | 1999-11-09 | 2001-05-15 | Taki Chem Co Ltd | Mixed composition of ore |
| JP2001220127A (en) * | 2000-02-01 | 2001-08-14 | Agency Of Ind Science & Technol | Method for refining magnesium silicate ore containing carbonate as impurity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102965760A (en) * | 2012-11-26 | 2013-03-13 | 荣盛石化股份有限公司 | Manufacturing method of antibacterial deodorizing polyester fiber |
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