JPH0355578B2 - - Google Patents
Info
- Publication number
- JPH0355578B2 JPH0355578B2 JP1052833A JP5283389A JPH0355578B2 JP H0355578 B2 JPH0355578 B2 JP H0355578B2 JP 1052833 A JP1052833 A JP 1052833A JP 5283389 A JP5283389 A JP 5283389A JP H0355578 B2 JPH0355578 B2 JP H0355578B2
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- fiber
- blanket
- fired
- precursor
- 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
- 239000000835 fiber Substances 0.000 claims description 45
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 19
- 239000002243 precursor Substances 0.000 claims description 16
- 238000004080 punching Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- -1 aluminum compound Chemical class 0.000 claims description 7
- 238000009987 spinning Methods 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 description 5
- 239000003831 antifriction material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- HDYRYUINDGQKMC-UHFFFAOYSA-M acetyloxyaluminum;dihydrate Chemical compound O.O.CC(=O)O[Al] HDYRYUINDGQKMC-UHFFFAOYSA-M 0.000 description 1
- 229940009827 aluminum acetate Drugs 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- VXYADVIJALMOEQ-UHFFFAOYSA-K tris(lactato)aluminium Chemical compound CC(O)C(=O)O[Al](OC(=O)C(C)O)OC(=O)C(C)O VXYADVIJALMOEQ-UHFFFAOYSA-K 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Fibers (AREA)
- Nonwoven Fabrics (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、結晶質アルミナ繊維からなるブラン
ケツトの製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a blanket made of crystalline alumina fibers.
高温の炉などに使用する耐火性断熱材の一つに
無機繊維からなるブランケツトがあるが、無機繊
維の中でも耐熱性のよいセラミツク繊維からなる
ものを製造することは容易でない。これは、セラ
ミツク繊維が概して剛直で絡みあいを生じにく
く、ニードルパンチ処理によつて絡みあいを生じ
させようとすると、もろく、折れ易いためであ
る。結晶質アルミナ繊維は特にこのような性質が
著しく、その優れた耐熱性をブランケツトの状態
で利用することが困難である。
Blankets made of inorganic fibers are one of the refractory heat insulating materials used in high-temperature furnaces, etc., but it is not easy to manufacture blankets made of ceramic fibers, which have good heat resistance among inorganic fibers. This is because ceramic fibers are generally rigid and do not easily form entanglements, and if an attempt is made to form entanglements through needle punching, they are brittle and easily break. Crystalline alumina fibers have particularly remarkable properties such as these, and it is difficult to utilize their excellent heat resistance in the form of a blanket.
上述の問題点を解決する手段の一つは特開昭60
−88162号公報に開示されており、そこでは、前
駆体繊維化法で得られたまだ柔軟な未焼成繊維を
層状に集積したものに対してニードルパンチング
処理が施され、その後、焼成が行われる。しかし
ながら、未焼成の前駆体繊維は柔軟であつても強
度が低く、ニードルパンチ処理によつて切れ易い
から、最終製品について見た場合、ニードルパン
チ処理の効果は不十分なものになり易い。 One of the ways to solve the above-mentioned problems is by
-88162, in which a layered accumulation of still flexible unfired fibers obtained by a precursor fiberization method is subjected to a needle punching treatment, and then fired. . However, even if the unfired precursor fibers are flexible, they have low strength and are easily broken by needle punching, so that the effect of needle punching tends to be insufficient in terms of the final product.
また、未焼成の前駆体繊維は、吸湿性であるた
め、ニードルパンチ工程で使用する減摩剤が非水
系のものに制限されるという欠点もある。 Furthermore, since the unfired precursor fibers are hygroscopic, there is also the drawback that the lubricant used in the needle punching process is limited to non-aqueous ones.
そこで本発明の目的は、ニードルパンチ処理に
よる繊維の確実な絡みあいを生じさせ、層状剥離
を起こしにくく物性的にもすぐれたアルミナ繊維
質ブランケツトを高能率で製造し得る方法を提供
することにある。
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for producing with high efficiency an alumina fiber blanket that is resistant to delamination and has excellent physical properties by ensuring fiber entanglement through needle punching. .
上記目的を達成することに成功した本発明のブ
ランケツト製造法は、アルミニウム化合物の繊維
形成性溶液を紡糸してアルミナ繊維の前駆体繊維
を製造し、得られた前駆体繊維を低温度で焼成
し、焼成後の繊維をブランケツト状に集積し、得
られた集積物をニードルパンチ処理し、次いで結
晶質アルミナ繊維が生成するまで高温で焼成する
ことを特徴とする。
The blanket manufacturing method of the present invention, which has succeeded in achieving the above object, involves spinning a fiber-forming solution of an aluminum compound to produce precursor fibers of alumina fibers, and sintering the obtained precursor fibers at a low temperature. The method is characterized in that the fired fibers are accumulated in a blanket shape, the resulting aggregate is needle punched, and then fired at a high temperature until crystalline alumina fibers are produced.
この製造法は、本発明者らによる次のような新
規な知見に基づき完成されたものである。すなわ
ち、前駆体繊維を焼成して結晶質アルミナ繊維を
製造する過程において一旦比較的低温度で焼成す
る工程を設けると、そこで得られた低温焼成繊維
は前駆体繊維よりもはるかに強度が高いことは勿
論、高温焼成して結晶質アルミナを十分に生じさ
せた場合よりも柔軟性がある。また、減摩剤とし
て非水系のものは勿論のこと水系のものも使用で
きるため、それを繊維に付着させるのにいわゆる
デイツピング法を採用でき、減摩剤の均一含浸が
容易である。以上により、低温焼成繊維は、ニー
ドルパンチ処理を行うのにきわめて適した性質の
ものである。 This manufacturing method was completed based on the following new findings by the present inventors. In other words, once a step of firing at a relatively low temperature is provided in the process of firing precursor fibers to produce crystalline alumina fibers, the resulting low-temperature fired fibers have much higher strength than the precursor fibers. Of course, it is more flexible than if it were fired at a high temperature to sufficiently produce crystalline alumina. Furthermore, since both non-aqueous and aqueous anti-friction agents can be used, the so-called dipping method can be used to attach the anti-friction agent to the fibers, making it easy to uniformly impregnate the anti-friction agent. As described above, the low-temperature fired fiber has properties that are extremely suitable for needle punching.
本発明の製造法によりアルミナ繊維ブランケツ
トを製造する場合、アルミニウム化合物の溶液か
ら前駆体繊維を製造する工程は、周知の方法を参
照し、任意の方法によつて行うことができる。通
常、好ましい原料アルミニウム化合物は、オキシ
塩化アルミニウム、塩基性酢酸アルミニウム、塩
基性乳酸アルミニウムなどである。これに少量配
合するシリカ源としては、シリカゾル、テトラエ
チルシリケートなどが適当である。アルミニウム
化合物の溶液に繊維形成性を与えるために添加す
る有機重合体としては、ポリビニルアルコール、
ポリチレングリコール、ポリアクリルアミドなど
を用いることができる。上記諸原料の溶液を濃縮
し、粘度約１〜500ポイズの紡糸液を調製し、遠
心法、吹出し法などの紡糸法により繊維化する。 When producing an alumina fiber blanket by the production method of the present invention, the step of producing precursor fibers from a solution of an aluminum compound can be carried out by any method with reference to well-known methods. Usually, preferred raw material aluminum compounds include aluminum oxychloride, basic aluminum acetate, and basic aluminum lactate. As a silica source to be added in a small amount to this, silica sol, tetraethyl silicate, etc. are suitable. Examples of organic polymers added to impart fiber-forming properties to the aluminum compound solution include polyvinyl alcohol,
Polyethylene glycol, polyacrylamide, etc. can be used. A solution of the above-mentioned raw materials is concentrated to prepare a spinning solution having a viscosity of about 1 to 500 poise, and it is made into fibers by a spinning method such as a centrifugal method or a blowing method.
得られた前駆体繊維を、乾燥後、酸化性雰囲気
で焼成し、繊維中の有機物およびアルミニウム化
合物を分解する。この焼成は、通常のアルミナ繊
維製造工程における焼成が結晶質アルミナを生じ
させ得る1000℃前後で行われるのに対し、それよ
りも低い温度、好ましくは約400℃〜800℃で、実
質的に結晶質アルミナを生じさせないようにして
行われる。 The obtained precursor fibers are dried and then fired in an oxidizing atmosphere to decompose organic substances and aluminum compounds in the fibers. This calcination is carried out at a lower temperature, preferably about 400°C to 800°C, to produce substantially crystalline alumina, whereas the calcination in the normal alumina fiber manufacturing process is carried out at around 1000°C, which can produce crystalline alumina. This is done in such a way as not to produce quality alumina.
得られた低温焼成繊維を常法によりブランケツ
ト状に集積し、さらに１〜60回／cm2程度の密度で
ニードルパンチ処理するが、それに先立つて、ニ
ードルパンチを容易にするため、繊維集積物に減
摩剤（たとえばパラフインなど）を付着させるこ
とが望ましい。 The obtained low-temperature fired fibers are collected into a blanket shape using a conventional method and then needle punched at a density of about 1 to 60 times/ cm2 . It is desirable to apply an anti-friction agent (such as paraffin).
その後、約800〜1300℃の高温酸化性雰囲気で
焼成し、繊維を結晶質アルミナ繊維に変換する。 The fibers are then fired in an oxidizing atmosphere at a high temperature of about 800-1300°C to convert the fibers into crystalline alumina fibers.
オキシ塩化アルミニウム水溶液（固形分濃度50
％、Al2O3換算濃度23％）1000mlに、20％シリカ
ゾル520ml、６％ポリビニルアルコール水溶液
700mlを添加し、減圧下、40℃で濃縮し、粘度30
ポイズの紡糸原液を得た。この紡糸原液を、遠心
法により紡糸、集綿、乾燥して、前駆体繊維を得
た。これを600℃の空気中で15分間焼成した。得
られた低温焼成綿をブランケツト状に集積し、パ
ラフイン系減摩剤を含浸後、乾燥した。
Aluminum oxychloride aqueous solution (solid content concentration 50
%, Al2O3 equivalent concentration 23%) 1000ml, 520ml of 20% silica sol, 6% polyvinyl alcohol aqueous solution
Add 700ml and concentrate at 40℃ under reduced pressure to a viscosity of 30
A spinning stock solution of Poise was obtained. This spinning stock solution was spun by a centrifugal method, collected, and dried to obtain precursor fibers. This was baked in air at 600°C for 15 minutes. The obtained low-temperature calcined cotton was collected in the form of a blanket, impregnated with a paraffin-based lubricant, and then dried.
次いで、ニードルパンチ機で30回／cm2のニード
ルパンチを施し、ブランケツトを得た。このブラ
ンケツトは、かさ密度が0.12ｇ／cm3で、引張強度
は1.3Kg／cm2、剥離強度は10ｇ／cm2であつた。 Next, needle punching was performed using a needle punching machine at a rate of 30 times/cm 2 to obtain a blanket. This blanket had a bulk density of 0.12 g/cm 3 , a tensile strength of 1.3 Kg/cm 2 and a peel strength of 10 g/cm 2 .
上述のように、本発明においては低温焼成によ
りニードルパンチ処理に最も適した物性になつた
ところでニードルパンチ処理が行われる。そし
て、この段階の繊維集積物は、前駆体繊維集積物
よりも減摩剤の均一含浸が容易である。これらの
理由により、本発明によれば前駆体繊維やアルミ
ナ繊維の状態でニードルパンチを行う場合よりも
繊維の折れが少なくて済み、それにより、ニード
ルパンチ処理が容易になるだけでなく処理効果が
高まり、層状剥離を起こしにくく、形状安定性が
優れたブランケツトを得ることができる。
As described above, in the present invention, needle punching is performed when the physical properties are most suitable for needle punching due to low temperature firing. The fiber aggregate at this stage is easier to uniformly impregnate with the lubricant than the precursor fiber aggregate. For these reasons, according to the present invention, there is less folding of the fibers than when needle punching is performed in the state of precursor fibers or alumina fibers, which not only facilitates the needle punching process but also improves the processing effect. It is possible to obtain a blanket that is hard to cause delamination and has excellent shape stability.
Claims (1)
してアルミナ繊維の前駆体繊維を製造し、得られ
た前駆体繊維を低温度で焼成し、焼成後の繊維を
ブランケツト状に集積し、得られた集積物をニー
ドルパンチ処理し、次いで結晶質アルミナ繊維が
生成するまで高温で焼成することを特徴とするア
ルミナ繊維製ブランケツトの製造法。 ２ 前駆体繊維の焼成を、繊維中のアルミニウム
化合物より結晶質アルミナが実質的に生じない温
度領域において行う請求項１記載の製造法。 ３ 前駆体繊維の焼成を800℃以下で行う請求項
２記載の製造法。 ４ ニードルパンチ処理に先立つてブランケツト
状集積物に減摩剤を付着させる請求項１記載の製
造法。[Claims] 1. Preparing precursor fibers of alumina fibers by spinning a fiber-forming solution of an aluminum compound, firing the obtained precursor fibers at a low temperature, and collecting the fired fibers in a blanket shape. A method for producing an alumina fiber blanket, comprising: needle-punching the resulting aggregate, and then firing at a high temperature until crystalline alumina fibers are produced. 2. The manufacturing method according to claim 1, wherein the precursor fiber is fired in a temperature range in which crystalline alumina is not substantially produced from the aluminum compound in the fiber. 3. The manufacturing method according to claim 2, wherein the precursor fiber is fired at a temperature of 800°C or lower. 4. The method of claim 1, wherein a lubricant is applied to the blanket-like aggregate prior to needle punching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1052833A JPH02234963A (en) | 1989-03-07 | 1989-03-07 | Manufacturing method of alumina fiber blanket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1052833A JPH02234963A (en) | 1989-03-07 | 1989-03-07 | Manufacturing method of alumina fiber blanket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02234963A JPH02234963A (en) | 1990-09-18 |
| JPH0355578B2 true JPH0355578B2 (en) | 1991-08-23 |
Family
ID=12925845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1052833A Granted JPH02234963A (en) | 1989-03-07 | 1989-03-07 | Manufacturing method of alumina fiber blanket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02234963A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2959683B2 (en) * | 1991-04-30 | 1999-10-06 | 三井鉱山株式会社 | Method for producing high-purity alumina fiber molded body |
| EP2037094A3 (en) * | 2001-05-25 | 2012-10-03 | Ibiden Co., Ltd. | Alumina-silica based fiber, ceramic fiber, ceramic fiber aggregation, holding seal material and manufacturing methods thereof, as well as manufacturing method of alumina fiber aggregation |
| CN117385552A (en) * | 2023-09-25 | 2024-01-12 | 常熟万龙机械有限公司 | Alumina fiber needled felt and preparation method thereof |
-
1989
- 1989-03-07 JP JP1052833A patent/JPH02234963A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02234963A (en) | 1990-09-18 |
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