JPH01157473A - Fine porous body - Google Patents
Fine porous bodyInfo
- Publication number
- JPH01157473A JPH01157473A JP31641887A JP31641887A JPH01157473A JP H01157473 A JPH01157473 A JP H01157473A JP 31641887 A JP31641887 A JP 31641887A JP 31641887 A JP31641887 A JP 31641887A JP H01157473 A JPH01157473 A JP H01157473A
- Authority
- JP
- Japan
- Prior art keywords
- fine particles
- fibers
- fine
- particles
- particle size
- 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
- 239000010419 fine particle Substances 0.000 claims abstract description 50
- 239000000835 fiber Substances 0.000 claims abstract description 43
- 239000002245 particle Substances 0.000 claims abstract description 40
- 239000011164 primary particle Substances 0.000 claims abstract description 6
- 239000012229 microporous material Substances 0.000 claims description 18
- 238000000465 moulding Methods 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 14
- 238000009413 insulation Methods 0.000 abstract description 11
- 239000004964 aerogel Substances 0.000 abstract description 3
- 229910001562 pearlite Inorganic materials 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 239000005909 Kieselgur Substances 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract description 2
- 239000004071 soot Substances 0.000 abstract description 2
- 238000005187 foaming Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 239000000377 silicon dioxide Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000123 paper Substances 0.000 description 4
- 239000010425 asbestos Substances 0.000 description 3
- 239000000378 calcium silicate Substances 0.000 description 3
- 229910052918 calcium silicate Inorganic materials 0.000 description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 229910052895 riebeckite Inorganic materials 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002655 kraft paper Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- -1 dried colloidal sols Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】 〔技術分野〕 この発明は、断熱性に優れた微細多孔体に関する。[Detailed description of the invention] 〔Technical field〕 The present invention relates to a microporous material with excellent heat insulation properties.
従来の断熱材の熱伝導率は０．０３〜０．０５ ｋｃａ
ｌ／ｍｈｒ”ｃ程度で、空気の熱伝導率０．０２〜０．
０２４ｋｃａｌ／ｍｈｒ″Ｃよりも高い。硬質発泡ポリ
ウレタンのように、０．０１５ ｋｃａｌ／ｍｈｒ”ｃ
という低い熱伝導率をもつ断熱材も開発されているが、
この発泡ポリウレタンの場合、空隙内に封入されたフレ
オンガスの持つ低い熱伝導率（０，００６〜０．０１ｋ
ｃａｌ／ｍｈｒ”ｃ）に依存しているだけのものであり
、長時間の使用でフレオンガスと空気との置換が起こる
と断熱性にも劣化が発生し、約１年後には０．０２１〜
０．０２４ ｋｃａｌ／ｍｈｒ”ｃ程度にまで熱伝導率
カ上昇してしまった例もある。The thermal conductivity of conventional insulation materials is 0.03-0.05 kca
l/mhr"c, the thermal conductivity of air is 0.02 to 0.
Higher than 0.024 kcal/mhr"C. Like rigid polyurethane foam, 0.015 kcal/mhr"C
Insulating materials with low thermal conductivity have also been developed,
In the case of this polyurethane foam, the Freon gas sealed in the voids has a low thermal conductivity (0.006 to 0.01k).
cal/mhr"c), and if Freon gas is replaced with air after long-term use, the insulation properties will also deteriorate, and after about a year, the temperature will be 0.021~
In some cases, the thermal conductivity increased to about 0.024 kcal/mhr"c.
また、発泡ポリウレタンの場合、有機物で構成されてい
るため、１００℃以上での使用はできず、用途が限られ
る。Further, in the case of foamed polyurethane, since it is composed of organic substances, it cannot be used at temperatures above 100°C, and its uses are limited.
これに対し、不燃性で熱伝導率の低い材料として、ケイ
酸カルシウムの多孔体を０．１ Ｔｏｒｒ程度の真空状
態にしたものや、発泡粉砕パーライトをＯｏｌ Ｔｏｒ
ｒ程度の真空状態にしたもの（特開昭６０−３３４７９
号公報参照）等があるが、いずれも、真空状態を保つこ
とが必要であり、製造コスト等の点で問題がある。しか
も、断熱材として利用するにしても、真空を維持する必
要から、形状や用途が著しく限定され、充分には実用化
されていない。On the other hand, nonflammable materials with low thermal conductivity include porous calcium silicate in a vacuum state of about 0.1 Torr and foamed and crushed pearlite.
A vacuum state of about r (Japanese Patent Application Laid-Open No. 60-33479
However, all of them require maintaining a vacuum state, which poses problems in terms of manufacturing costs and the like. Moreover, even when used as a heat insulating material, the shape and use are extremely limited due to the need to maintain a vacuum, and it has not been fully put to practical use.
常圧でも空気の熱伝導率を超えた断熱材として、微細多
孔質シリカの集合体による材料がある（特公昭５１−４
００８８号公報参照）が、空気との熱伝導率差は僅かな
ものであるし、脆くて機械的強度的な点で十分ではない
。また、高価な微細多孔質シリカが必ず多量に必要であ
るという点でコスト面の問題もある。そのため、広く利
用されるまでには至っていない。As a heat insulating material whose thermal conductivity exceeds that of air even at normal pressure, there is a material made from aggregates of microporous silica (Japanese Patent Publication No. 51-4
However, the difference in thermal conductivity with air is small, and it is brittle and does not have sufficient mechanical strength. There is also a cost problem in that a large amount of expensive microporous silica is necessarily required. Therefore, it has not reached the point where it is widely used.
この発明は、以上の事情に鑑みてなされたものであって
、常圧において断熱性に優れ、製造が容易であり、かつ
安価であって、しかも、良好な機械的強度をもつ実用的
な微細多孔体を提供することを目的とする。This invention has been made in view of the above circumstances, and is a practical microstructure that has excellent heat insulation properties at normal pressure, is easy to manufacture, is inexpensive, and has good mechanical strength. The purpose is to provide a porous body.
発明者らは、上記目的のうち常圧において断熱性に優れ
、製造が容易であり、かつ安価である微細多孔体として
、−次粒子径の異なる２種以上の微粒子が成形されてな
る微細多孔体を先に案出し、これを出願した。Among the above objects, the inventors have developed a microporous body formed by molding two or more types of microparticles with different primary particle diameters, as a microporous body that has excellent heat insulation properties at normal pressure, is easy to manufacture, and is inexpensive. I devised the body first and applied for it.
ところが、この先の微細多孔体は、断熱性に大変優れ、
製造し易く、安価であるが、機械的強度の面では改善さ
れず、未だ、従来のものと同様に、非常に脆く、壊れや
すくて取り扱いも困難であり、実用性に関しては今ひと
つであった。However, future microporous materials have excellent insulation properties,
Although it is easy to manufacture and inexpensive, it has not been improved in terms of mechanical strength, and is still very brittle, easy to break, and difficult to handle, just like conventional products, and its practicality has not been satisfactory.
そこで、さらに検討を行った結果、−次粒子径の異なる
２種以上の微粒子に対し繊維を共存させると、微細多孔
体の機械的強度が増し、実用性が著しく高まるという知
見を得て、この発明を完成させることができたのである
。Therefore, as a result of further investigation, we found that when fibers coexist with two or more types of fine particles with different primary particle sizes, the mechanical strength of the microporous material increases and its practicality increases significantly. He was able to complete his invention.
すなわち、この発明は、−次粒子径の異なる２種以上の
微粒子が混合成形されてなる微細多孔体であって、前記
微粒子に繊維を共存させて成形されてなることを特徴と
する微細多孔体を要旨としている。That is, the present invention provides a microporous body formed by mixing and molding two or more types of fine particles having different primary particle diameters, the fine porous body being molded in such a manner that the fine particles coexist with fibers. The gist is:
以下、この発明にかかる微細多孔体を詳しく説明する。Hereinafter, the microporous body according to the present invention will be explained in detail.
この発明にかかる微細多孔体が、常圧において断熱性に
優れているという点についてまず説明する。First, the point that the microporous material according to the present invention has excellent heat insulation properties at normal pressure will be explained.
多孔体の熱伝導率は、空隙中に含まれる気体（通常は空
気）の熱伝導率に左右される。気体の熱伝導率の影響を
なくすためには、微細多孔体中の空隙を、極く狭い空隙
（気体の平均自由工程よりも小さい空隙であり、具体的
には、空気の場合には、たとえば１ｎｍ〜６０ｎｍ程度
）とする必要がある。ところが、微細多孔体では、第５
図にみるように、粒子Ｐを最密充填状態にしても、その
粒子ＰＳＰ間には、粒径の１５％程度の空隙が生ずる。The thermal conductivity of a porous body depends on the thermal conductivity of the gas (usually air) contained in the voids. In order to eliminate the influence of the thermal conductivity of gas, the voids in the microporous material must be made extremely narrow (smaller than the mean free path of the gas; specifically, in the case of air, for example, (approximately 1 nm to 60 nm). However, in microporous materials, the fifth
As shown in the figure, even if the particles P are packed in the closest packed state, voids of about 15% of the particle size are created between the particles PSP.
この空隙を小さくすれば断熱性が高まるのである。した
がって、前記のような極く狭い空隙を得るためには、非
常に粒径の小さい粒子を用いればよいことになる。とこ
ろが、粒径の小さい微粒子は凝集性が強く、第６図に示
すように、大きな多次粒子Ｐ′を形成し、この多次粒子
Ｐ′、Ｐ′間に大きな空隙ができてしまって、気体の熱
伝導率の影響を強く受けてしまう。例えば、微粉末シリ
カの場合、粉末表面にシラノール基のＯＨが多量に存在
しており、水素結合により粉末同士の結合が強いため、
特に凝集し易い。しかし、第３図にみるように、−次粒
子径の異なる２種類の微粒子Ａ、Ｂが共存していると、
粒径の大きい微粒子Ａの隙間に粒径の小さい微粒子Ｂが
うまく分かれて存在しており、微細多孔体の空隙の大き
さは、粒径の小さい微粒子Ｂ、Ｂ間の隙間で決まる極く
狭いものになる。そのため、気体の熱伝導率の影響を除
去でき、十分な断熱性を有することになる。By making these voids smaller, insulation can be improved. Therefore, in order to obtain extremely narrow voids as described above, it is sufficient to use particles with a very small particle size. However, fine particles with a small particle size have a strong aggregation property, and as shown in FIG. 6, they form large multi-dimensional particles P', and large voids are created between these multi-dimensional particles P' and P'. It is strongly affected by the thermal conductivity of the gas. For example, in the case of fine powder silica, there are a large amount of silanol group OH on the powder surface, and the bond between the powders is strong due to hydrogen bonds.
Particularly easy to aggregate. However, as shown in Figure 3, when two types of fine particles A and B with different particle diameters coexist,
Fine particles B with a small particle size are well separated and exist in the gaps between fine particles A with a large particle size, and the size of the void in the microporous material is extremely narrow determined by the gap between the fine particles B with a small particle size. Become something. Therefore, the influence of the thermal conductivity of gas can be removed, and sufficient heat insulation properties can be obtained.
なお、粒径の小さい微粒子Ｂが多くなると、第４図にみ
るように、微粒子Ｂが微粒子Ａを取り囲むようなかたち
となる。Note that when the number of fine particles B with a small particle size increases, the fine particles B surround the fine particles A, as shown in FIG.
粒径の大きい微粒子Ａが存在するため、安価で製造し易
くなる。微粒子Ａが含まれている分、比較的高価な粒径
の小さい微粒子Ｂが節約できるので、安価になるのであ
る。また、製造し易くなるのは、成形性が良くなるから
である。粒径の大きな粒子Ａ（と下記繊維Ｃ）と粒径の
小さい微粒子Ｂとが、互いに成形圧を分散し、吸収しあ
う等して、成形圧を均一に保つ働きを有しているためと
考えられる。Since the fine particles A having a large particle size are present, it is inexpensive and easy to manufacture. Because the fine particles A are included, the relatively expensive fine particles B, which have a small particle size, can be saved, resulting in a lower price. Moreover, the reason why it is easier to manufacture is because the moldability is improved. This is because particles A with a large particle size (and fibers C below) and fine particles B with a small particle size have the function of keeping the molding pressure uniform by distributing and absorbing the molding pressure with each other. Conceivable.
そして、この微細多孔体は、第１図にみるように、微粒
子Ａ、Ｂに繊維Ｃを共存させている。このように微細多
孔体に繊維Ｃが含まれていると、微粒子Ａ、Ｂと繊維Ｃ
の間のいわば絡み作用で、それらの間の結合状態が強ま
り、その結果、微細多孔体の機械的強度が高まることに
なるのである。微粒子のみを成形した微細多孔体の機械
的強度に比べて著しく向上し、微細多孔体が実用性ある
ものとなる。なお、微粒子Ｂの量が多い場合には、第２
図にみるように、微粒子Ａが微粒子Ｂに囲まれるような
かたちとなる。また、繊維の共存は成形性を向上させる
作用もある。As shown in FIG. 1, this microporous material has fine particles A and B coexisting with fibers C. If the microporous material contains fibers C in this way, fine particles A and B and fibers C
The so-called interlocking action between them strengthens the bond between them, and as a result, the mechanical strength of the microporous body increases. The mechanical strength is significantly improved compared to that of a microporous material formed by molding only fine particles, making the microporous material practical. Note that if the amount of fine particles B is large, the second
As shown in the figure, fine particles A are surrounded by fine particles B. Furthermore, the coexistence of fibers also has the effect of improving moldability.
微粒子Ａとしては、発泡パーライト、シラスバルーン、
および、これらの微粉砕物、スス、コロイダルゾルの乾
燥物、エアロゲル（乾式あるいは湿式製法微粒子シリカ
）、ケイソウ土、ケイ酸カルシウム、酸化チタン等が挙
げられるが、これらに限らない。これらは単独で、ある
いは、複数混合して使用することができる。As fine particles A, foamed perlite, shirasu balloon,
Examples include, but are not limited to, finely pulverized products of these materials, soot, dried colloidal sols, aerogels (dry or wet-process fine particle silica), diatomaceous earth, calcium silicate, titanium oxide, and the like. These can be used alone or in combination.
微粒子Ｂとしては、前記コロイダルゾルの乾燥物、ポリ
ケイ酸、エアロゲル（湿式製法微粉末シリカ、乾式製法
微粉末シリカ）等が挙げられるが、これらに限らない。Examples of the fine particles B include, but are not limited to, dry products of the colloidal sol, polysilicic acid, aerogels (wet process fine powder silica, dry process fine powder silica), and the like.
これらは単独で、あるいは、複数混合して使用すること
ができる。These can be used alone or in combination.
微粒子Ａの粒径は、従来のものと同様５ｎｍ〜１０μｍ
程度であることが好ましく、５ｎｍ〜１μｍの範囲内で
あることがより好ましい。一方、微粒子Ｂの粒径は、通
常は１〜１０ｎｍ程度であることが好ましく、３〜８ｎ
ｍの範囲内であることがより好ましい。ただ、微粒子Ｂ
として湿式製法微粉末シリカ、乾式製法微粉末シリカを
用いる場合には、粒径が、１〜１０１００ｎより好まし
くは６〜３０ｎｍの範囲）であることが好ましい。なお
、以上に示した粒径の範囲には重複している部分がある
が、両微粒子Ａ、Ｂは、「微粒子Ａの粒径〉微粒子Ｂの
粒径」の条件が必ず満たされるように選定されている。The particle size of fine particles A is 5 nm to 10 μm, similar to conventional ones.
The thickness is preferably within the range of 5 nm to 1 μm. On the other hand, the particle size of the fine particles B is usually preferably about 1 to 10 nm, and 3 to 8 nm.
More preferably, it is within the range of m. However, fine particles B
When using wet-process fine powder silica or dry-process fine powder silica, the particle size is preferably in the range of 1 to 10,100 nm, more preferably 6 to 30 nm. Note that although there is some overlap in the particle size ranges shown above, both fine particles A and B are selected so that the condition of "particle size of fine particle A> particle size of fine particle B" is always satisfied. has been done.
なお、以上の説明では、粒径の種類が２種類であったが
、微粒子間で粒径が３種類以上あってもよいことはいう
までもない。各微粒子と繊維の共存状態も、第１．２図
に示したものに限らない。In the above explanation, there are two types of particle sizes, but it goes without saying that there may be three or more types of particle sizes among the fine particles. The coexistence state of each fine particle and fiber is not limited to that shown in FIG. 1.2.
繊維としては、セラミック繊維、ガラス繊維、ロックウ
ール繊維、アスベスト繊維、炭素繊維、アラミド繊維等
の無機繊維や有機繊維が挙げられる。各繊維は単独であ
るいは、複数種類併用して用いられる。繊維の径は、１
〜３０μｍ（より好ましくは１〜５μｍ）程度の範囲が
好ましい。繊維の長さは、１〜３０１ｍ（より好ましく
は５〜２０＋ｕ）程度の範囲が好ましい。繊維によって
は、混合処理中に切れて短くなることもあるので、上記
繊維の長さはもうすこし長くてもかまわない場合がある
。粒子に対する添加量は、粒子の総量に対して５〜２０
重量％程度の範囲が好ましい。５重量％を下回ると、機
械的強度向上の程度が少なく、２０重量％を上回ると断
熱性の向上の程度が少なくなってくるからである。繊維
は一種類だけでなく複数種類を同時に併用するようにし
てもよい。繊維はなるべく均一に分散している方がよい
微粒子と繊維の混合方法は、例えば、高速ミキサーによ
る方法がある。成形方法は、例えば、加圧成形方法があ
る。しかし、混合方法や成形方法はこれらの方法に限ら
ない。Examples of the fibers include inorganic fibers and organic fibers such as ceramic fibers, glass fibers, rock wool fibers, asbestos fibers, carbon fibers, and aramid fibers. Each fiber may be used alone or in combination. The fiber diameter is 1
A range of approximately 30 μm (more preferably 1 to 5 μm) is preferable. The length of the fibers is preferably in the range of about 1 to 301 m (more preferably 5 to 20+ m). Some fibers may break and become short during the mixing process, so the length of the fibers may be slightly longer. The amount added to the particles is 5 to 20% of the total amount of particles.
A range of about % by weight is preferred. This is because if it is less than 5% by weight, the degree of improvement in mechanical strength will be small, and if it exceeds 20% by weight, the degree of improvement in heat insulation will be reduced. Not only one type of fiber but also multiple types of fibers may be used simultaneously. A method of mixing fine particles and fibers in which the fibers should be dispersed as uniformly as possible includes, for example, a method using a high-speed mixer. The molding method includes, for example, a pressure molding method. However, the mixing method and molding method are not limited to these methods.
また、微粒子Ａ、Ｂと繊維Ｃはハニカム構造体の空間部
に充填され成形されているようであってもよい。このよ
うにすると、−層、機械的強度が増す。ハニカム構造体
としては、クラフト紙、アスベスト紙、水酸化アルミニ
ウム等を含浸させた不燃ハニカム、セラミック、金属薄
板等の板材を、円形、三角形、四角形、六角形等の任意
の形状の孔を有する構造に形成した通常のものを使用す
ることができる。そして、通常、ハニカム構造体の両面
、あるいは、片面に接着剤で板材も固着する。板材には
、クラフト紙やアスベスト紙、段ボール紙、水酸化アル
ミニウム等を含浸させた不燃紙等の紙、金属板、合板、
ガラスクロス、ケイ酸カルシウム板、石膏ボード等が使
用される。Further, the fine particles A and B and the fibers C may be filled and molded into the spaces of the honeycomb structure. This increases the mechanical strength of the layer. The honeycomb structure is made of kraft paper, asbestos paper, non-combustible honeycomb impregnated with aluminum hydroxide, ceramic, thin metal plate, etc., and has holes of any shape such as circular, triangular, square, hexagonal, etc. You can use a regular one formed in . Then, usually, plate materials are also fixed to both sides or one side of the honeycomb structure with an adhesive. Board materials include kraft paper, asbestos paper, cardboard paper, noncombustible paper impregnated with aluminum hydroxide, metal plates, plywood, etc.
Glass cloth, calcium silicate board, gypsum board, etc. are used.
つぎに、この発明の具体的な実施例と比較例を製造の様
子も含めて説明する。Next, specific examples and comparative examples of the present invention will be described, including the manufacturing process.
なお、以下の実施例および比較例における微粒子の粒径
は、窒素吸着法によってその比表面積を求め、密度を２
．５と仮定して算出した。In addition, the particle size of the fine particles in the following Examples and Comparative Examples is determined by determining the specific surface area by the nitrogen adsorption method and calculating the density by 2.
．． Calculations were made assuming that 5.
（実施例１）
発泡粉砕パーライト（粒径：９．５μｍ、三井金属パー
ライト■製 Ｆ Ｐ −’１ ） をボールミルにより
粉砕して得られた微粉砕物（粒径：５００ｎｍ）と、エ
アロゲル（粒径：約ｌｎｍ５日本アエロジル０１製 Ａ
ＥＲＯＳＩＬ ３８０ ）を重量比１：１で混和した粉
末を作製した。混和した粉末の重量に対し、セラミック
ファイバー（直径：２．８μｍ、長さ：５０鶴、新日鉄
化学■製ＳＣバルク＃１１１）を７重量％さらに加えた
後、高速ミキサー（約３００Ｏｒｐｍ）で攪拌し、均一
に分散・混合させた。ついで、この混合物を圧力１０ｋ
ｇ／ｃ−で成形し微細多孔体を得た。(Example 1) A finely pulverized product (particle size: 500 nm) obtained by pulverizing foamed pulverized pearlite (particle size: 9.5 μm, FP-'1 manufactured by Mitsui Kinzoku Perlite ■) with a ball mill, and an airgel (particle size: 500 nm) Diameter: approx. lnm5 Made by Nippon Aerosil 01 A
A powder was prepared by mixing EROSIL 380) at a weight ratio of 1:1. After adding 7% by weight of ceramic fiber (diameter: 2.8 μm, length: 50 cranes, SC bulk #111 manufactured by Nippon Steel Chemical Co., Ltd.) based on the weight of the mixed powder, the mixture was stirred with a high-speed mixer (approximately 300 rpm). , uniformly dispersed and mixed. Then, this mixture was heated to a pressure of 10 k.
g/c- to obtain a microporous body.
（実施例２）
繊維の添加量を、５重量％とした以外は、実施例１と同
様にして、微細多孔体を得た。(Example 2) A microporous body was obtained in the same manner as in Example 1 except that the amount of fiber added was 5% by weight.
（実施例３）
繊維の添加量を、１０重量％とした以外は、実施例１と
同様にして、微細多孔体を得た。(Example 3) A microporous body was obtained in the same manner as in Example 1 except that the amount of fiber added was 10% by weight.
（実施例４）
繊維の添加量を、３０重量％とした以外は、実施例１と
同様にして、微細多孔体を得た。(Example 4) A microporous body was obtained in the same manner as in Example 1 except that the amount of fiber added was 30% by weight.
（実施例５）
繊維として、セラミックファイバーの代わりに、ロック
ウールファイバー（直径＝４μｍ、長さ８３０〜４３ｍ
ｍ、新日鉄化学■製 Ｓファイバー層状綿）を加えるよ
うにした以外は、実施例１と同様にして微細多孔体を得
た。(Example 5) Rock wool fiber (diameter = 4 μm, length 830 to 43 m) was used as the fiber instead of ceramic fiber.
A microporous material was obtained in the same manner as in Example 1, except for adding S fiber layered cotton (manufactured by Nippon Steel Chemical Co., Ltd.).
（実施例６）
繊維として、セラミックファイバーの代わりに、カーボ
ンファイバー（直径＝１５μｍ、長さ：２０■璽、日本
カーボン＠！Ａ）を加えるようにした以外は、実施例１
と同様にして微細多孔体を得た〈実施例７）
パーライト微粉砕物の代わりに、酸化チタン（粒径：１
９Ｑｎｍ 古河鉱業側型 ＦＲ−４１）を用いた以外
は、実施例１と同様にして微細多孔体を得た。(Example 6) Example 1 except that carbon fiber (diameter = 15 μm, length: 20 cm, Nippon Carbon @!A) was added instead of ceramic fiber as the fiber.
A microporous body was obtained in the same manner as in Example 7. Titanium oxide (particle size: 1
A microporous body was obtained in the same manner as in Example 1, except that 9Qnm Furukawa Mining Type FR-41) was used.
（比較例１）
実施例１において、繊維を混合しない以外は、実施例１
と同様にして、微細多孔体を得た。(Comparative Example 1) Example 1 except that the fibers were not mixed in Example 1.
A microporous material was obtained in the same manner as above.
（比較例２）
実施例７において、繊維を混合しない以外は、実施例７
と同様にして、微細多孔体を得た。(Comparative Example 2) Example 7 except that the fibers were not mixed in Example 7.
A microporous material was obtained in the same manner as above.
（比較例３）
実施例１において、繊維とエアロゲルの両方を混合しな
い以外は、実施例１と同様にして、微細多孔体を得た。(Comparative Example 3) A microporous body was obtained in the same manner as in Example 1 except that both the fiber and the airgel were not mixed.
（比較例４）
比較例２において、エアロゲルも混合しないようにした
以外は、比較例２と同様にして、微細多孔体を得た。(Comparative Example 4) A microporous body was obtained in the same manner as in Comparative Example 2, except that airgel was not mixed either.
実施例ならびに比較例の各微細多孔体の熱伝導率および
曲げ強度を測定した。熱伝導率の測定は、英仏精機■製
の定常法による熱伝導率測定装置を使用して、ＡＳＴＭ
−Ｃ５１８に準拠した方法で、設定温度２０℃と４０℃
の条件で行った。また、曲げ強度はＪＩＳ＾９５１０に
準拠して測定した。The thermal conductivity and bending strength of each microporous body of Examples and Comparative Examples were measured. Thermal conductivity was measured using a thermal conductivity measuring device manufactured by Anglo-French Seiki Co., Ltd. using the steady method.
- Set temperature 20°C and 40°C in accordance with C518
It was conducted under the following conditions. Further, the bending strength was measured in accordance with JIS^9510.
第１表の結果より、この発明の実施例による微細多孔体
は、いずれも、低い熱伝導率を維持しつつ、比較例と較
べて１桁近く良好な機械的強度を有していて、より実用
的であることが分かる。From the results in Table 1, it can be seen that the microporous bodies according to the examples of the present invention all have mechanical strength that is nearly one order of magnitude better than that of the comparative examples while maintaining low thermal conductivity. It turns out to be practical.
この発明の微細多孔体は、以上に詳述したとおり、−次
粒子径の異なる２種以上の微粒子と共に繊維が成形され
ているため、常圧において断熱性に優れ、製造が容易で
あり、かつ安価であって、しかも、良好な機械的強度を
もち極めて実用的である。As detailed above, the microporous material of the present invention has fibers molded together with two or more types of fine particles having different primary particle sizes, so it has excellent heat insulation properties at normal pressure, is easy to manufacture, and It is inexpensive, has good mechanical strength, and is extremely practical.
第１図および第２図は、それぞれ、この発明の微細多孔
体の一例の構造を拡大して模式的にあられす説明図、第
３図および第４図は、それぞれ、微粒子による空隙状態
の一例を模式的に示す説明図、第５図は、従来の粒子に
よる空隙状態を模式的に示す説明図、第６図は、粒径の
小さい微粒子間の空隙状態の参考例を模式的に示す説明
図である。
Ａ・・・粒径の大きい微粒子 Ｂ・・・粒径の小さい微
粒子 Ｃ・・・繊維
代理人 弁理士 松 本 武 彦
第１図
第２図
第３図
第４図
第５図
＠６図
弓稿ヅ酵甫正書（自発
昭和６３年２月２５日FIGS. 1 and 2 are respectively enlarged explanatory views of the structure of an example of the microporous material of the present invention, and FIGS. 3 and 4 are examples of the state of voids caused by fine particles, respectively. FIG. 5 is an explanatory diagram schematically showing a void state due to conventional particles. FIG. 6 is an explanatory diagram schematically showing a reference example of a void state between fine particles with a small particle size. It is a diagram. A...Fine particles with large particle size B...Fine particles with small particle size C...Fiber agent Patent attorney Takehiko Matsumoto Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 @ Figure 6 Bow Manuscript published on February 25, 1988
Claims (2)
されてなる微細多孔体であって、前記微粒子に繊維を共
存させて成形されてなることを特徴とする微細多孔体。(1) A microporous body formed by mixing and molding two or more types of fine particles having different primary particle diameters, the fine porous body being formed by making fibers coexist with the fine particles.
ｍ〜６０ｎｍである特許請求の範囲第１項記載の微細多
孔体。(2) The size of the voids formed by fine particles is 1n
2. The microporous material according to claim 1, wherein the microporous material has a particle size of m to 60 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31641887A JPH01157473A (en) | 1987-12-15 | 1987-12-15 | Fine porous body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31641887A JPH01157473A (en) | 1987-12-15 | 1987-12-15 | Fine porous body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01157473A true JPH01157473A (en) | 1989-06-20 |
Family
ID=18076854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31641887A Pending JPH01157473A (en) | 1987-12-15 | 1987-12-15 | Fine porous body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01157473A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999013681A2 (en) * | 1997-09-05 | 1999-03-18 | 1... Ipr Limited | Aerogels, piezoelectric devices, and uses therefor |
| WO2006065904A1 (en) * | 2004-12-15 | 2006-06-22 | Cabot Corporation | Aerogel containing blanket |
-
1987
- 1987-12-15 JP JP31641887A patent/JPH01157473A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999013681A2 (en) * | 1997-09-05 | 1999-03-18 | 1... Ipr Limited | Aerogels, piezoelectric devices, and uses therefor |
| WO1999013681A3 (en) * | 1997-09-05 | 1999-08-05 | 1 Ipr Limited | Aerogels, piezoelectric devices, and uses therefor |
| WO2006065904A1 (en) * | 2004-12-15 | 2006-06-22 | Cabot Corporation | Aerogel containing blanket |
| US7635411B2 (en) | 2004-12-15 | 2009-12-22 | Cabot Corporation | Aerogel containing blanket |
| US8021583B2 (en) | 2004-12-15 | 2011-09-20 | Cabot Corporation | Aerogel containing blanket |
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