JPH0453993B2 - - Google Patents
Info
- Publication number
- JPH0453993B2 JPH0453993B2 JP59207774A JP20777484A JPH0453993B2 JP H0453993 B2 JPH0453993 B2 JP H0453993B2 JP 59207774 A JP59207774 A JP 59207774A JP 20777484 A JP20777484 A JP 20777484A JP H0453993 B2 JPH0453993 B2 JP H0453993B2
- Authority
- JP
- Japan
- Prior art keywords
- inorganic
- weight
- formite
- water
- fibers
- 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
- 239000000843 powder Substances 0.000 claims description 27
- 239000012784 inorganic fiber Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000002657 fibrous material Substances 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 229920002401 polyacrylamide Polymers 0.000 claims description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 229910017119 AlPO Inorganic materials 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- 229910052845 zircon Inorganic materials 0.000 claims description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 3
- 239000004113 Sepiolite Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052624 sepiolite Inorganic materials 0.000 description 5
- 235000019355 sepiolite Nutrition 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000008394 flocculating agent Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000003311 flocculating effect Effects 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- -1 formite Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Landscapes
- Producing Shaped Articles From Materials (AREA)
- Paper (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は耐熱性と緻密性に優れた無機粉末を主
体とする無機成形品の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing an inorganic molded article mainly made of an inorganic powder having excellent heat resistance and compactness.
（従来技術及びその問題点）
従来、無機粉末を主体とする成形品には無機粉
末をアクリルラテツクスやカチオン化パルプなど
で結合したものが知られている。これらは無機粉
末の定着率が高く、常温における強度や可撓性も
あるが、アクリルラテツクスやカチオン化パルプ
が有機質であるため高温における耐性がなく、高
温域では燃失してしまうので、耐熱性や不燃性を
要求される分野には使用できなかつた。(Prior Art and its Problems) Conventionally, molded products made mainly of inorganic powder are known, in which inorganic powder is bonded with acrylic latex, cationized pulp, or the like. These have a high fixation rate of inorganic powder and have strength and flexibility at room temperature, but since acrylic latex and cationized pulp are organic, they have no resistance to high temperatures and burn out in high temperature ranges, so they are heat resistant. It could not be used in fields that required safety and nonflammability.
これを改良したものとして、無機粉末をセピオ
ライトで結合した無機成形品が提案されている。
セピオライトは無機粉末を水中で吸着分散し、乾
燥により団結するので、湿式抄造により無機成形
品を製造することができ、この様にして得た無機
成形品は耐熱性、不燃性に優れるだけでなく、強
度や可撓性も有している。ところが、セピオライ
トは繊維径が0.1〜0.5μmと極めて細く、無機粉末
も非常に微細であるため、緻密になる反面、水
性が悪くて水時間が長くなるので実際の生産に
は適さなかつた。また水性を良くするためにす
き網の目を粗くすると、無機粉末が抜けて歩留り
が悪くなつたり、成形品が形成できなくなつたり
する問題が生じた。 As an improvement on this, an inorganic molded article in which inorganic powder is bonded with sepiolite has been proposed.
Sepiolite adsorbs and disperses inorganic powder in water and solidifies upon drying, so inorganic molded products can be produced by wet papermaking.The inorganic molded products obtained in this way not only have excellent heat resistance and nonflammability, but also It also has strength and flexibility. However, sepiolite has a very thin fiber diameter of 0.1 to 0.5 μm, and the inorganic powder is also very fine, so although it is dense, it has poor water properties and takes a long time to soak, making it unsuitable for actual production. Furthermore, when the mesh of the mesh was made coarser in order to improve the water quality, problems arose in that the inorganic powder fell out, resulting in poor yields and inability to form molded products.
（発明の目的）
本発明は上記従来技術の欠点を解消すべくなさ
れたものであり、耐熱性、緻密性のある無機成形
品を水性良く製造する方法を得ることを目的と
する。(Objective of the Invention) The present invention has been made in order to eliminate the drawbacks of the above-mentioned conventional techniques, and an object of the present invention is to provide a method for producing an inorganic molded article having heat resistance and density with good water resistance.
（発明の構成及び作用）
本発明は水酸化アルミニウム（Al（OH）3）、ア
ルミナ（Al2O3）、シリカ（SiO2）、マグネシア
（MgO）、チタニア（TiO2）、ジルコニア
（ZrO2）、ジルコン（ZrO2・SiO2）、酸化クロム
（Cr2O3）、炭化ケイ素（SiC）、チツ化ケイ素
（Si3N4）、チツ化ホウ素（BN）、リン酸アルミニ
ウム（AlPO4）、アルミナセメント、マグネシア
セメント、ドロマイトクリンカー（MgCO3・
CaCO3）の中から選ばれる無機粉末（以下、単
に「無機粉末」という60〜90重量％とホルマイト
系繊維状物５〜30重量％と平均繊維径１〜5μmの
無機繊維５〜35重量％とを水中で混合した後、ノ
ニオン系ポリアクリルアミドを含む凝集剤を加え
た水分散液を抄造することを特徴とする無機成形
品の製造方法である。(Structure and operation of the invention) The present invention uses aluminum hydroxide (Al(OH) 3 ), alumina (Al 2 O 3 ), silica (SiO 2 ), magnesia (MgO), titania (TiO 2 ), zirconia (ZrO 2 ) . ), zircon (ZrO 2・SiO 2 ), chromium oxide (Cr 2 O 3 ), silicon carbide (SiC), silicon titanide (Si 3 N 4 ), boron titanide (BN), aluminum phosphate (AlPO 4 ) , alumina cement, magnesia cement, dolomite clinker ( MgCO3・
60 to 90% by weight of inorganic powder (hereinafter simply referred to as "inorganic powder") selected from CaCO 3 ), 5 to 30% by weight of holmite-based fibrous materials, and 5 to 35% by weight of inorganic fibers with an average fiber diameter of 1 to 5 μm. This is a method for producing an inorganic molded article, which is characterized by mixing in water, and then forming an aqueous dispersion to which a flocculant containing nonionic polyacrylamide is added.
すなわち、本発明の特徴は、従来、無機粉末と
ホルマイト系繊維状物から形成されていた無機成
形品に繊維径１〜5μmの無機繊維５〜35重量％を
加え、かつホルマイト系繊維状物に対して顕著な
凝集効果を持つノニオン系ポリアクリルアミドを
含む凝集剤を用いることにより、無機成形品に必
要な緻密性を損わずに飛躍的に水性を向上させた
点にある。 That is, the feature of the present invention is that 5 to 35% by weight of inorganic fibers with a fiber diameter of 1 to 5 μm are added to the inorganic molded article conventionally formed from inorganic powder and formite-based fibrous material, and By using a flocculant containing nonionic polyacrylamide, which has a remarkable flocculating effect, the water-based properties of the inorganic molded article can be dramatically improved without impairing the compactness required for the inorganic molded article.
本発明の無機粉末は耐熱性に優れた水酸化アル
ミニウム（Al（OH）3）、アルミナ（Al2O3）、シリ
カ（SiO2）、マグネシア（MgO）、チタニア
（TiO2）、ジルコニア（ZrO2）、ジルコン
（ZrO2・SiO2）、酸化クロム（Cr2O3）、炭火ケイ
素（SiC）、チツ化ケイ素（Si3N4）、チツ化ホウ
素（BN）、リン酸アルミニウム（AlPO4）、アル
ミナセメント、マグネシアセメント、ドロマイト
クリンカー（MgCO3・CaCO3の焼成品）などの
粉末の中から選ばれる。これら無機粉末は成形品
を緻密なものにするために少なくとも60重量％は
必要であるが、ホルマイト系繊維状物と無機繊維
の最低必要量との関係から90重量％を超えてはな
らない。 The inorganic powder of the present invention has excellent heat resistance such as aluminum hydroxide (Al(OH) 3 ), alumina (Al 2 O 3 ), silica (SiO 2 ), magnesia (MgO), titania (TiO 2 ), and zirconia (ZrO 2 ), zircon (ZrO 2 / SiO 2 ), chromium oxide (Cr 2 O 3 ), silicon charcoal (SiC), silicon titanide (Si 3 N 4 ), boron titanide (BN), aluminum phosphate (AlPO 4 ), alumina cement, magnesia cement, dolomite clinker (calcined product of MgCO 3 / CaCO 3 ), etc. The amount of these inorganic powders is required to be at least 60% by weight in order to make the molded product dense, but the amount should not exceed 90% by weight due to the relationship between the minimum required amounts of formite-based fibrous material and inorganic fibers.
また、本発明のホルマイト系繊維状物とは、含
水マグネシウムケイ酸塩鉱物のセピオライトや含
水マグネシウム・アルミニウムケイ酸鉱物のアタ
パルジヤイトなどのいわゆる複鎖状構造を有する
粘土性鉱物のうち繊維形状をなすものをいう。こ
れらホルマイト系繊維状物は、その結晶構造内に
多数のすき間を有しているため吸着性に優れてお
り、無機繊維や無機粉末を吸着して水に容易に分
散することができる。また、ホルマイト系繊維状
物は表面に多数の水酸基を有しているため乾燥固
結性もあり、他の結合剤を使用せずに成形品を形
成することができる。このホルマイト系繊維状物
は成形品を形成するのに必要な結合力や粉末の定
着力を得るために少なくとも５重量％は必要であ
るが、30重量％を超えると緻密になつて水性が
低下するので30重量％以下でなければならない。
なお、とくに無機成形品の強度を要する場合や製
造条件によつて補助的に有機繊維やバインダーな
どを使用してもよい。 Furthermore, the formite-based fibrous material of the present invention refers to clay minerals having a so-called double-chain structure, such as sepiolite, which is a hydrous magnesium silicate mineral, and attapulgite, which is a hydrous magnesium/aluminum silicate mineral, and which is in the form of fibers. means. These formite-based fibrous materials have a large number of gaps in their crystal structure, so they have excellent adsorption properties, and can adsorb inorganic fibers and powders and easily disperse them in water. Furthermore, since the formite-based fibrous material has a large number of hydroxyl groups on its surface, it also has dry solidification properties and can be formed into molded products without using any other binder. At least 5% by weight of this formite-based fibrous material is required to obtain the binding force and powder fixing power necessary to form a molded product, but if it exceeds 30% by weight, it becomes dense and the aqueous property decreases. Therefore, it must be less than 30% by weight.
Note that organic fibers, binders, etc. may be used as supplementary materials, especially when the strength of the inorganic molded product is required or depending on the manufacturing conditions.
本発明においては上記の無機粉末とホルマイト
系繊維状物に加えて平均繊維径１〜5μmの無機繊
維が使用される。この無機繊維には無機粉末とホ
ルマイト系繊維状物とで形成される緻密な層の中
に微小な空隙を形成し、毛細管現象などにより水
を通過させて水性を高める働きがある。そのう
え、この無機繊維を含むことによつて得られる無
機成形品の寸法安定性と強度も向上する。ここで
使用する無機繊維は平均繊維径が１〜5μmでなけ
ればならないが、これは1μm未満であると依然と
して緻密になり過ぎるため水性を向上させる効
果が小さく、5μmを超えるとホルマイト系繊維状
物の繊維径との隔たりが大きくなつて無機繊維と
ホルマイト及び粉末が分離し別々の層を形成する
ため、水性が悪くなると同時に成形品の強度が
不足するからである。また、この無機繊維が５重
量％未満であると水性を向上する効果は小さ
く、35重量％を超えると成形品内部の空隙が多く
なり緻密性が阻害されるので５〜35重量％の範囲
でなければならない。 In the present invention, in addition to the above-mentioned inorganic powder and formite-based fibrous material, inorganic fibers having an average fiber diameter of 1 to 5 μm are used. These inorganic fibers have the function of forming minute voids in a dense layer formed of inorganic powder and formite-based fibrous material, allowing water to pass through through capillary action, and increasing the water content. Furthermore, by including this inorganic fiber, the dimensional stability and strength of the inorganic molded article obtained are also improved. The inorganic fibers used here must have an average fiber diameter of 1 to 5 μm, but if it is less than 1 μm, it will still be too dense and will have little effect on improving water properties, and if it exceeds 5 μm, it will cause formite-based fibers. This is because the distance between the fiber diameter and the inorganic fiber becomes large and the inorganic fiber, formite, and powder separate and form separate layers, resulting in poor aqueous properties and insufficient strength of the molded product. In addition, if the content of this inorganic fiber is less than 5% by weight, the effect of improving water properties will be small, and if it exceeds 35% by weight, voids will increase inside the molded product and compactness will be inhibited. There must be.
本発明の無機繊維には種々の無機繊維が使用で
きるが、とくに耐熱性に優れたシリカ系、アルミ
ナ系、シリカ−アルミナ系、炭化ケイ素系などの
無機繊維が好適である。 Various inorganic fibers can be used as the inorganic fiber of the present invention, but inorganic fibers such as silica-based, alumina-based, silica-alumina-based, and silicon carbide-based inorganic fibers, which have excellent heat resistance, are particularly suitable.
上述の無機粉末60〜90重量％とホルマイト系繊
維状物５〜30重量％と平均繊維径１〜5μmの無機
繊維５〜35重量％とを水中に投入して撹拌する
と、ホルマイト系繊維状物の吸着分散作用により
これらはほぼ均一に混合される。この３成分の混
合順序にはとくに限定されるものではないが、い
ずれか２成分を混合した後、他の１成分を加えて
もよいし、３成分同時に水中に投入して混合して
もよい。また、ホルマイト系繊維状物はあらかじ
めスラリーにしてから加えてもよい。 When 60-90% by weight of the above-mentioned inorganic powder, 5-30% by weight of formite-based fibrous material, and 5-35% by weight of inorganic fibers with an average fiber diameter of 1-5 μm are poured into water and stirred, formite-based fibrous material is produced. These are mixed almost uniformly due to the adsorption and dispersion effect of . The order of mixing these three components is not particularly limited, but after mixing any two components, another component may be added, or the three components may be added to water at the same time and mixed. . Further, the formite-based fibrous material may be added after being made into a slurry in advance.
次にノニオン系ポリアクリルアミドを含む凝集
剤を加えて水分散液を調整する。この凝集剤は水
分散液中の無機粉末、ホルマイト系繊維状物、無
機繊維を凝集させ、水性や歩留りを向上させる
ことができる。ここで、とくにノニオン系ポリア
クリルアミドを使用するのは、これがホルマイト
系繊維状物に対して顕著な凝集効果を示すからで
あり、他の凝集剤、とくにノニオン系以外の凝集
剤ではこの効果は極めて小さくなる。ただし、本
発明の水分散液中には無機繊維や無機粉末も含ま
れるので、他の凝集剤を併用してもよい。この凝
集剤の量はポリアクリルアミドの重合度などによ
つても異なるが、ホルマイト系繊維状物の重量に
対して約１〜10重量％含まれていれば良好な水
性と歩留りとを得ることができる。なお、水分散
液の濃度は約0.1〜４％程度に調節して使用すれ
ばよい。この凝集剤を加えた後、水分散液を再度
撹拌し、抄造する。この抄造は一般の抄紙機によ
りシート状にしてもよいし、周壁に脱水孔を有す
る所定形状の型に入れて吸引脱水してもよい。ま
た本発明においては、上述の無機繊維と凝集剤の
作用により、目の細いすき網を用いても短い水
時間で良好な生産ができるだけでなく、多少目の
粗いすき網であつても無機粉末やホルマイト系繊
維状物の脱落は生じにくいので歩留り良く生産で
きる。 Next, a flocculant containing nonionic polyacrylamide is added to prepare an aqueous dispersion. This flocculant can flocculate inorganic powders, formite-based fibrous materials, and inorganic fibers in an aqueous dispersion, thereby improving water properties and yield. Here, nonionic polyacrylamide is particularly used because it shows a remarkable flocculating effect on formite-based fibrous materials, and this effect is extremely weak with other flocculants, especially non-nonionic flocculants. becomes smaller. However, since the aqueous dispersion of the present invention also contains inorganic fibers and inorganic powder, other flocculants may be used in combination. The amount of this flocculant varies depending on the degree of polymerization of the polyacrylamide, etc., but if it is contained in an amount of about 1 to 10% by weight based on the weight of the formite-based fibrous material, good aqueous properties and yield can be obtained. can. The concentration of the aqueous dispersion may be adjusted to about 0.1 to 4%. After adding this flocculant, the aqueous dispersion is stirred again and paper-formed. This paper may be made into a sheet using a general paper machine, or may be placed in a mold with a predetermined shape having dehydration holes in the peripheral wall and dehydrated by suction. In addition, in the present invention, due to the action of the inorganic fibers and flocculant mentioned above, not only can good production be achieved in a short water time even when using a fine mesh mesh, but also inorganic powder can be produced even with a somewhat coarse mesh. Since it is difficult for holmite-based fibrous materials to fall off, production can be achieved with a high yield.
従つて、本発明によれば広範囲の目の大きさの
すき網を使用することができ、とくに特別な装置
を用いることなく、通常の抄造装置により良好な
生産ができる。 Therefore, according to the present invention, it is possible to use cloth nets with a wide range of mesh sizes, and good production can be achieved using ordinary papermaking equipment without using any special equipment.
なお、以上の様にして得られた無機成形品は耐
熱性、不燃性に優れ、緻密で強度があるうえに可
撓性も備えていた。また従来の無機粉末とホルマ
イト系繊維状物でけからなる無機成形品が高温で
熱収縮をおこすという欠点があるのに対し本発明
により得られる無機成形品は寸法安定性も良好で
あつた。 The inorganic molded product obtained as described above had excellent heat resistance and nonflammability, was dense, strong, and flexible. Furthermore, whereas conventional inorganic molded products made of inorganic powder and formite-based fibrous materials have the disadvantage of thermal shrinkage at high temperatures, the inorganic molded products obtained by the present invention also have good dimensional stability.
（実施例）
実施例 １
粒径４〜5μmのアルミナ粉末12ｇとセビオライ
ト４ｇと平均繊維径２〜3μmのシリカアルミナ繊
維２ｇとを５の水中に投入して撹拌混合し、こ
れにノニオン系ポリアクリルアミド凝集剤を固形
分で0.12ｇ含む0.1％水溶液を加えて再度撹拌し
て、水分散液を得た。この水分散液をタツピー箱
型手抄機（25cm×50cmスクリーン70メツシユ）で
抄造してシート状無機成形品を得た。(Example) Example 1 12 g of alumina powder with a particle size of 4 to 5 μm, 4 g of Seviolite, and 2 g of silica alumina fibers with an average fiber diameter of 2 to 3 μm were added to water in Step 5 and mixed with stirring, and nonionic polyacrylamide was added to this. A 0.1% aqueous solution containing 0.12 g of a flocculant in solid content was added and stirred again to obtain an aqueous dispersion. This aqueous dispersion was made into paper using a tuppy box-type hand paper machine (25 cm x 50 cm screen, 70 meshes) to obtain a sheet-like inorganic molded product.
このとき水時間は60秒で歩留りが97％と良好
に無機成形品を製造できた。また得られた無機成
形品も緻密で強度もあり、とくに耐熱性、不燃性
には優れていた。 At this time, the water time was 60 seconds, and the inorganic molded product was successfully manufactured with a yield of 97%. The obtained inorganic molded product was also dense and strong, and had particularly excellent heat resistance and nonflammability.
比較例 １
シリカ、アルミナ繊維を使用しなかつたこと以
外はすべて実施例１と同様にして製造した。Comparative Example 1 A product was manufactured in the same manner as in Example 1 except that silica and alumina fibers were not used.
このとき歩留りは98％と良好であつたが水時
間は600秒以上かかり、非常に生産性が悪かつた。
また得られた無機成形品も実施例１のものと比較
して、高温における強度と寸法安定性が劣つてい
た。 At this time, the yield was good at 98%, but the water time was over 600 seconds, and productivity was very poor.
Furthermore, the obtained inorganic molded product was inferior in strength and dimensional stability at high temperatures as compared to that of Example 1.
比較例 ２
ノニオン系ポリアクリルアミド凝集剤を加えな
かつたこと以外はすべて実施例１と同様にして製
造した。Comparative Example 2 A product was produced in the same manner as in Example 1 except that the nonionic polyacrylamide flocculant was not added.
このとき歩留りは80％とやや悪く水時間も
600秒以上かかり、非常に生産性が悪かつた。 At this time, the yield was 80%, which was rather poor, and the water time was also low.
It took over 600 seconds and was extremely unproductive.
実施例 ２
粒径1μmの水酸化アルミニウム粉末14ｇとセピ
オライト２ｇと平均繊維径２〜3μmのシリカアル
ミナ繊維４ｇとを５ｇの水中に投入して撹拌混合
し、これにノニオン系ポリアクリルアミド凝集剤
を0.3ｇ加えて再度撹拌して水分散液を得た。こ
の水分散液をタツピー箱型手抄機（25cm×50cmス
クリーン70メツシユ）で抄造してシート状無機成
形品を得た。Example 2 14 g of aluminum hydroxide powder with a particle size of 1 μm, 2 g of sepiolite, and 4 g of silica alumina fibers with an average fiber diameter of 2 to 3 μm were added to 5 g of water and mixed with stirring, and 0.3 g of a nonionic polyacrylamide flocculant was added to this. g was added and stirred again to obtain an aqueous dispersion. This aqueous dispersion was made into paper using a tuppy box-type hand paper machine (25 cm x 50 cm screen, 70 meshes) to obtain a sheet-like inorganic molded product.
このときの水時間は50秒で歩留りは96％と良
好に無機成形品が製造できた。得られた無機成形
品はとくに緻密性に優れたものであつた。 The water time at this time was 50 seconds, and the yield was 96%, meaning that inorganic molded products could be manufactured satisfactorily. The obtained inorganic molded article was particularly excellent in density.
（発明の効果）
以上述べた様に、本発明は平均繊維径１〜5μm
の無機繊維とノニオン系ポリアクリルアミドを含
む凝集剤を使用することにより、無機成形品の緻
密性を損わずに水性を向上させることができる
ので、極めて生産性良く無機成形品を製造でき
る。また本発明の方法はすき網の目が細かくても
粗くても実施できるので、特別な装置を設ける必
要もなく、一般に使用されている抄造装置により
無機成形品を製造できる。(Effect of the invention) As described above, the present invention has an average fiber diameter of 1 to 5 μm.
By using an aggregating agent containing inorganic fibers and nonionic polyacrylamide, it is possible to improve the aqueous properties of the inorganic molded product without impairing its compactness, making it possible to manufacture the inorganic molded product with extremely high productivity. Furthermore, since the method of the present invention can be carried out regardless of whether the mesh size of the screen is fine or coarse, there is no need to provide special equipment, and inorganic molded products can be manufactured using commonly used paper-making equipment.
なお、得られる無機成形品は緻密性、強度、寸
法安定性に優れており、とくに無機繊維と無機粉
末に耐熱性の高いものを使用すれば、耐火シート
や溶融金属に浸漬して用いるセンサー保護管や施
釉後の窯業下敷材などに利用でき、また無機粉末
に粒径の小さいものを使用すれば、気体遮断性を
必要とする全熱交換素子などにも利用できる。 The resulting inorganic molded product has excellent density, strength, and dimensional stability, and if inorganic fibers and powders with high heat resistance are used, it can be used to protect sensors that are immersed in fireproof sheets or molten metal. It can be used for pipes and ceramic underlay materials after glazing, and if an inorganic powder with a small particle size is used, it can also be used for total heat exchange elements that require gas barrier properties.
Claims (1)
（Al2O3）、シリカ（SiO2）、マグネシア（MgO）、
チタニア（TiO2）、ジルコニア（ZrO2）、ジルコ
ン（ZrO2・SiO2）、酸化クロム（Cr2O3）、炭化ケ
イ素（SiC）、チツ化ケイ素（Si3N4）、チツ化ホ
ウ素（BN）、リン酸アルミニウム（AlPO4）、ア
ルミナセメント、マグネシアセメント、ドロマイ
トクリンカー（MgCO3・CaCO3）の中から選ば
れる無機粉末60〜90重量％とホルマイト系繊維状
物５〜30重量％と平均繊維径１〜5μmの無機繊維
５〜35重量％とを水中で混合した後、ノニオン系
ポリアクリルアミドを含む凝集剤を加えた水分散
液を抄造することを特徴とする無機成形品の製造
方法。1 Aluminum hydroxide (Al(OH) 3 ), alumina (Al 2 O 3 ), silica (SiO 2 ), magnesia (MgO),
Titania (TiO 2 ), zirconia (ZrO 2 ), zircon (ZrO 2・SiO 2 ), chromium oxide (Cr 2 O 3 ), silicon carbide (SiC), silicon titanide (Si 3 N 4 ), boron titanide ( BN), aluminum phosphate (AlPO 4 ), alumina cement, magnesia cement, dolomite clinker (MgCO 3 / CaCO 3 ), 60-90% by weight of inorganic powder and 5-30% by weight of formite-based fibrous material. A method for producing an inorganic molded article, which comprises mixing 5 to 35% by weight of inorganic fibers with an average fiber diameter of 1 to 5 μm in water, and then forming an aqueous dispersion to which a flocculant containing nonionic polyacrylamide is added. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20777484A JPS6186473A (en) | 1984-10-02 | 1984-10-02 | Manufacture of inorganic formed article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20777484A JPS6186473A (en) | 1984-10-02 | 1984-10-02 | Manufacture of inorganic formed article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6186473A JPS6186473A (en) | 1986-05-01 |
| JPH0453993B2 true JPH0453993B2 (en) | 1992-08-28 |
Family
ID=16545298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20777484A Granted JPS6186473A (en) | 1984-10-02 | 1984-10-02 | Manufacture of inorganic formed article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6186473A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014069604A1 (en) | 2012-11-02 | 2014-05-08 | 出光興産株式会社 | Adhesive composition and adhesive tape using same |
| WO2014069606A1 (en) | 2012-11-02 | 2014-05-08 | 出光興産株式会社 | Polyolefin, adhesive composition containing same, and adhesive tape using said adhesive composition |
| WO2014077258A1 (en) | 2012-11-15 | 2014-05-22 | 出光興産株式会社 | Propylene-based polymer and hot melt adhesive |
| WO2014129301A1 (en) | 2013-02-22 | 2014-08-28 | 出光興産株式会社 | Propylene-type polymer and hot-melt adhesive agent |
| WO2014192767A1 (en) | 2013-05-27 | 2014-12-04 | 出光興産株式会社 | Base polymer for hot-melt adhesive agent, and hot-melt adhesive agent |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2971240B2 (en) * | 1992-03-24 | 1999-11-02 | 東レ・ダウコーニング・シリコーン株式会社 | Method for producing water-repellent molded body |
| CN101935229B (en) * | 2010-09-25 | 2012-10-10 | 武汉科技大学 | Microporous high chrome brick and preparation method thereof |
| CN115768944A (en) * | 2020-07-10 | 2023-03-07 | 株式会社巴川制纸所 | Flame-retardant sheet |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5272757A (en) * | 1975-12-15 | 1977-06-17 | Conwed Corp | Incombustible hardboard sheet |
| JPS5519736B2 (en) * | 1972-11-25 | 1980-05-28 | ||
| JPS56165097A (en) * | 1980-05-23 | 1981-12-18 | Ibigawa Electric Ind Co Ltd | Heat resistant inorganic fiber sheet article |
| JPS5870799A (en) * | 1981-10-22 | 1983-04-27 | 日東紡績株式会社 | Production of mineral fiberboard |
| JPS58144196A (en) * | 1982-02-12 | 1983-08-27 | イビデン株式会社 | Production of heat resistant elastic sheet-like article |
| JPS5921800A (en) * | 1982-07-29 | 1984-02-03 | 棚橋 胖 | Fire retardant paper |
| JPS63138103A (en) * | 1986-11-28 | 1988-06-10 | Hitachi Ltd | In-plant individual operation system during external power loss |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5844777Y2 (en) * | 1978-07-25 | 1983-10-11 | 東急建設株式会社 | Hardened cement door frame |
-
1984
- 1984-10-02 JP JP20777484A patent/JPS6186473A/en active Granted
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5519736B2 (en) * | 1972-11-25 | 1980-05-28 | ||
| JPS5272757A (en) * | 1975-12-15 | 1977-06-17 | Conwed Corp | Incombustible hardboard sheet |
| JPS56165097A (en) * | 1980-05-23 | 1981-12-18 | Ibigawa Electric Ind Co Ltd | Heat resistant inorganic fiber sheet article |
| JPS5870799A (en) * | 1981-10-22 | 1983-04-27 | 日東紡績株式会社 | Production of mineral fiberboard |
| JPS58144196A (en) * | 1982-02-12 | 1983-08-27 | イビデン株式会社 | Production of heat resistant elastic sheet-like article |
| JPS5921800A (en) * | 1982-07-29 | 1984-02-03 | 棚橋 胖 | Fire retardant paper |
| JPS63138103A (en) * | 1986-11-28 | 1988-06-10 | Hitachi Ltd | In-plant individual operation system during external power loss |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014069604A1 (en) | 2012-11-02 | 2014-05-08 | 出光興産株式会社 | Adhesive composition and adhesive tape using same |
| WO2014069606A1 (en) | 2012-11-02 | 2014-05-08 | 出光興産株式会社 | Polyolefin, adhesive composition containing same, and adhesive tape using said adhesive composition |
| WO2014077258A1 (en) | 2012-11-15 | 2014-05-22 | 出光興産株式会社 | Propylene-based polymer and hot melt adhesive |
| WO2014129301A1 (en) | 2013-02-22 | 2014-08-28 | 出光興産株式会社 | Propylene-type polymer and hot-melt adhesive agent |
| WO2014192767A1 (en) | 2013-05-27 | 2014-12-04 | 出光興産株式会社 | Base polymer for hot-melt adhesive agent, and hot-melt adhesive agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6186473A (en) | 1986-05-01 |
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