JPH11131105A - Production of metallic fiber sintered sheet - Google Patents
Production of metallic fiber sintered sheetInfo
- Publication number
- JPH11131105A JPH11131105A JP9314645A JP31464597A JPH11131105A JP H11131105 A JPH11131105 A JP H11131105A JP 9314645 A JP9314645 A JP 9314645A JP 31464597 A JP31464597 A JP 31464597A JP H11131105 A JPH11131105 A JP H11131105A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- sheet
- fibers
- binder
- metal fiber
- 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.)
- Granted
Links
Landscapes
- Powder Metallurgy (AREA)
- Paper (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はフィルター材料、耐
熱材料、導電材料等に使用される多孔性シートであっ
て、１００％金属繊維で構成されている金属繊維焼結シ
ートの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a porous sheet used for a filter material, a heat resistant material, a conductive material and the like, and relates to a method for producing a metal fiber sintered sheet composed of 100% metal fibers.
【０００２】[0002]
【従来の技術】従来１００％の金属繊維シート状物とし
ては、金網、ウェブ、織布および焼結体等が知られてい
る。金網、ウェブ、織布は金属繊維の単繊維あるいは複
数繊維の長繊維を用いて、メッシュ状あるいは布状に編
組、紡織したもので、焼結体は粉末状又は短繊維状の金
属を散布し、これを真空中あるいは不活性ガス中で加
圧、加熱し融着させたものである。しかしながら、編組
あるいは紡織して製造した金網、ウェブ、織布において
は薄いシートが作れなく、孔径の小さなものができない
こと、また従来の製造方法にて製造した焼結体において
は生産性が悪く、厚薄のムラが大きいこと、低密度であ
るため導電材料として必ずしも好ましい特性を有してい
ないこと、長尺品を製造することができないこと、等の
問題があった。2. Description of the Related Art Wire nets, webs, woven fabrics, sintered bodies and the like are known as 100% metal fiber sheet materials. Wire nets, webs, and woven fabrics are braided and woven into a mesh or cloth using single or multiple long fibers of metal fibers. This is pressurized, heated and fused in a vacuum or in an inert gas. However, wire meshes, webs, and woven fabrics manufactured by braiding or weaving cannot produce thin sheets and cannot have small pore sizes.In addition, productivity is poor in sintered bodies manufactured by conventional manufacturing methods. There are problems such as large unevenness in thickness, thinness, low density, and not necessarily having desirable characteristics as a conductive material, and inability to manufacture long products.
【０００３】このため本出願人は先に前記従来技術の問
題を解決するため特開昭６１−２２３１０５号や特開平
７−１３８６０６号等において、金属繊維を７０重量％
以上含有する湿式抄紙法によりシート化して得た金属繊
維高配合シートを、そのまま真空、又は水素や不活性ガ
ス雰囲気の下に金属繊維の融点を越えない温度にて繊維
間を焼結する金属繊維焼結シートの製造方法を提案し
た。しかしながら該製造方法から得られた金属繊維焼結
シートは、緻密な網状構造で均一性のあるシートが得ら
れにくく、特に金属繊維の繊維径が１０μｍ以上の太径
繊維のものでは、繊維の十分な絡み合いが得られにくい
ため、抄紙機での製造において湿式の強度が得られず断
紙によるトラブルや均一性のあるシートが得られず、品
質上、生産上の問題を有するものであり、加えて坪量２
００ｇ／ｍ2以下の薄葉シートは全く生産できない状況
であった。[0003] For this reason, the present applicant has previously disclosed in Japanese Patent Application Laid-Open No. 61-223105 and Japanese Patent Application Laid-Open No. 7-138606 that 70% by weight
A metal fiber obtained by sintering fibers at a temperature that does not exceed the melting point of the metal fiber under vacuum or under an atmosphere of hydrogen or an inert gas as it is, using a highly mixed metal fiber sheet obtained by forming a sheet by a wet papermaking method containing the above. A method for manufacturing a sintered sheet was proposed. However, the metal fiber sintered sheet obtained from the manufacturing method is difficult to obtain a sheet having a dense network structure and uniformity. Particularly, in the case of a metal fiber having a fiber diameter of 10 μm or more, sufficient fiber It is difficult to obtain a proper entanglement, so that wet strength cannot be obtained in production with a paper machine, troubles due to paper breakage and uniform sheets cannot be obtained, and there are quality and production problems. Weight 2
The thin sheet having a thickness of 00 g / m 2 or less could not be produced at all.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記の事情に
鑑みてなされたもので、緻密な網状構造で、均一性を有
し、かつ、薄葉から厚手のものまで任意の繊維径の金属
繊維からなる優れた金属繊維焼結シートが得られる製造
方法を提供するものである。DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and has a dense net-like structure, uniformity, and a metal fiber having an arbitrary fiber diameter from thin to thick. The present invention provides a method for producing an excellent sintered metal fiber sheet comprising:
【０００５】[0005]
【課題を解決するための手段】本発明は、金属繊維、分
割繊維およびバインダーを含有する繊維のスラリーを湿
式抄紙法によりシート化して金属繊維配合シートを作製
し、然るのち分割繊維及びバインダーを熱分解して除去
した後、金属繊維の融点を越えない温度にて繊維間を焼
結することを特徴とする金属繊維焼結シートの製造方法
である。以下に本発明の金属繊維焼結シートの製造方法
について詳述する。According to the present invention, a slurry of fibers containing metal fibers, split fibers and a binder is formed into a sheet by a wet papermaking method to prepare a metal fiber-containing sheet, and then the split fibers and the binder are mixed. A method for producing a sintered metal fiber sheet, comprising sintering fibers at a temperature not exceeding the melting point of the metal fibers after removing them by thermal decomposition. Hereinafter, the method for producing the sintered metal fiber sheet of the present invention will be described in detail.
【０００６】本発明において、焼結前の金属繊維配合シ
ートの作製にあたっては湿式抄紙法を採用する。すなわ
ち金属繊維の配合率が好ましくは４０重量％以上に調製
されたスラリーを湿式抄紙法により脱水プレスおよび加
熱乾燥して金属繊維高配合シートを作製する。この場
合、金属繊維の配合率が４０重量％未満であると後の焼
結の際、金属繊維間の焼結融合が阻害されるおそれがあ
り、また、熱分解除去する成分が６０％以上に多くなる
と生産性、コスト的にも好ましくない。本発明で使用す
る金属繊維としては、繊維径が１〜４０μｍ、繊維長が
１〜２０ｍｍのステンレス、チタン、真ちゅう、銅、ア
ルミニウム等の繊維であり、これらの中でも細線加工が
可能、耐熱性、耐錆性等に優れていることからステンレ
ス繊維が本発明に好適に用いられる。In the present invention, a wet papermaking method is employed for producing a metal fiber-containing sheet before sintering. That is, a slurry prepared so that the blending ratio of metal fibers is preferably 40% by weight or more is dewatered by a wet papermaking method and dried by heating to produce a highly blended metal fiber sheet. In this case, if the compounding ratio of the metal fibers is less than 40% by weight, sintering fusion between the metal fibers may be hindered during the subsequent sintering, and the component to be thermally decomposed and removed may be 60% or more. If it increases, it is not preferable in terms of productivity and cost. The metal fibers used in the present invention are fibers having a fiber diameter of 1 to 40 μm and a fiber length of 1 to 20 mm, such as stainless steel, titanium, brass, copper, and aluminum, among which fine wire processing is possible, heat resistance, Stainless steel fibers are preferably used in the present invention because of their excellent rust resistance and the like.
【０００７】本発明で用いる分割繊維とは、１本の繊維
が繊維の長さ方向つまり縦に裂けて複数本の微細繊維に
なるもので、例えば２種類の異なったポリマー成分が交
互に放射状に配列した断面構造をした繊維であって、分
散機等により物理的な力を加えることにより１本の繊維
が例えば４分割乃至１６分割されて、上記の２種類の異
なったポリマーの極細繊維となるものである。このよう
にある程度分散した状態で極細繊維に分割するため、予
め極細繊維を用いた場合には得られない金属繊維の優れ
た分散状態が達成されるものである。[0007] The split fiber used in the present invention is one in which one fiber splits in the length direction of the fiber, that is, longitudinally, to form a plurality of fine fibers. For example, two kinds of different polymer components are alternately radiated. Fibers having an arrayed cross-sectional structure, in which one fiber is divided into, for example, 4 to 16 by applying physical force with a disperser or the like, to become ultrafine fibers of the above two different polymers. Things. As described above, since the fibers are divided into ultrafine fibers in a state of being dispersed to some extent, an excellent dispersion state of the metal fibers that cannot be obtained when the ultrafine fibers are used in advance is achieved.
【０００８】このような分割繊維を構成するポリマーと
しては、ポリエチレン、ポリプロピレン、ポリエステ
ル、エチレン−ビニルアルコール共重合体、ナイロン等
が挙げられ、本発明においてはこれらを適宜組み合わせ
た分割繊維を用いることができるが、中でも、ポリエチ
レン、ポリプロピレン等のポリオレフィン系を含む分割
繊維が好適であり、特にポリプロピレンとエチレンビニ
ルアルコール共重合体からなる分割繊維が、優れた分散
性が達成されると共に、湿式抄紙の際に湿紙強度の向上
が得られると共に、抄紙原料となるスラリーの調製に必
要とされる叩解を必要とすることない生産性のメリット
も有することから好ましく用いることができる。このよ
うな分割繊維の市販品としては、例えば、大和紡績社製
の商品名“セパ”が挙げられる。Examples of the polymer constituting such split fibers include polyethylene, polypropylene, polyester, ethylene-vinyl alcohol copolymer, and nylon. In the present invention, it is possible to use split fibers obtained by appropriately combining these. Among them, among them, split fibers containing polyolefins such as polyethylene and polypropylene are preferable, and split fibers made of polypropylene and an ethylene vinyl alcohol copolymer achieve excellent dispersibility, and are particularly suitable for wet papermaking. It can be preferably used because it has the advantage of improving wet paper strength and has the advantage of productivity that does not require beating required for preparing a slurry as a papermaking raw material. Commercial products of such split fibers include, for example, "Sepa" (trade name, manufactured by Daiwa Spinning Co., Ltd.).
【０００９】また、バインダーとしては湿式抄紙の際の
乾燥工程でシート中において熱溶融する機能を有するも
のであれば適宜使用することができる。具体的には、ポ
リビニルアルコール繊維、ポリエチレン繊維、ポリプロ
ピレン繊維等が挙げられるが、本発明においては、水へ
の分散性に優れ、金属繊維との混合性が良いこと、比較
的低い温度で熱溶融すること等からポリビニルアルコー
ル繊維が好ましく、特に、例えば（株）クラレ社製のク
ラレビニロンフィブリットＶＰ（商品名）として知られ
ているような水中溶解温度４０〜１００℃の易溶解性ポ
リビニルアルコール繊維が好適に用いられる。As the binder, any binder can be used as long as it has a function of heat melting in a sheet in a drying step in wet papermaking. Specifically, polyvinyl alcohol fiber, polyethylene fiber, polypropylene fiber and the like can be mentioned. In the present invention, it is excellent in dispersibility in water, good in mixing with metal fiber, and heat-melted at a relatively low temperature. Polyvinyl alcohol fibers are preferred because of their ability to be used. In particular, easily soluble polyvinyl alcohol fibers having a water dissolution temperature of 40 to 100 ° C., for example, known as Kuraray Vinylon Fibrit VP (trade name) manufactured by Kuraray Co., Ltd. Is preferably used.
【００１０】本発明においては、上記の如き金属繊維、
分割繊維及びバインダーを少なくとも含有する繊維のス
ラリーを調製して、湿式抄紙法により抄造、脱水及び加
熱乾燥することにより金属繊維配合シートを形成するも
のである。ここで、該スラリーにおける配合割合は、特
に限定されるものではないが金属繊維は前述のように４
０重量％以上、好ましくは７０〜９５重量％、特に好ま
しくは８０〜９０重量％であり、分割繊維は１〜２０重
量％、好ましくは１〜１０重量％、特に好ましくは３〜
７重量％であり、バインダーは４０重量％以下、好まし
くは２０重量％以下、特に好ましくは５〜１５重量％で
ある。なお、分割繊維の配合量が少な過ぎると湿紙強度
が不足して断紙等のトラブルを生じるだけでなく、良好
な金属繊維の分散性が得られずに地合いの悪い不均一な
シートとなり、逆に多過ぎると得られた金属繊維配合シ
ートの湿式抄紙法により得られる加熱乾燥後の強度が不
十分となり、繊維の脱離を生じやすくなり取扱い性等の
問題を生じるおそれがある。また、バインダーが少な過
ぎると上記と同様にか熱乾燥後のシートの強度が不十分
となり、逆に多すぎると焼結後の金属繊維シートの強度
が損われるおそれがあり好ましくない。In the present invention, a metal fiber as described above,
A metal fiber-containing sheet is formed by preparing a slurry of fibers containing at least a split fiber and a binder, and forming, dewatering, and heating and drying by a wet papermaking method. Here, the mixing ratio in the slurry is not particularly limited, but the metal fiber is 4% as described above.
0% by weight or more, preferably 70 to 95% by weight, particularly preferably 80 to 90% by weight, and the split fiber is 1 to 20% by weight, preferably 1 to 10% by weight, particularly preferably 3 to 10% by weight.
7% by weight, and the binder is 40% by weight or less, preferably 20% by weight or less, particularly preferably 5 to 15% by weight. In addition, if the compounding amount of the split fibers is too small, not only does the strength of the wet paper web become insufficient, causing troubles such as paper breakage, but also a non-uniform sheet having poor formation without obtaining good metal fiber dispersibility, Conversely, if the amount is too large, the strength of the obtained metal fiber-containing sheet after heating and drying obtained by the wet papermaking method becomes insufficient, and the fibers are likely to be detached, which may cause problems such as handleability. On the other hand, if the amount of the binder is too small, the strength of the sheet after heat drying becomes insufficient as described above, and if the amount is too large, the strength of the metal fiber sheet after sintering may be impaired.
【００１１】次にこのようにして得られた金属繊維配合
シートを、真空または低真空度の雰囲気ガス下で前記分
割繊維とバインダーを熱分解し除去する。金属繊維配合
シート中の分割繊維とバインダーを熱分解し除去するた
めには、例えば真空焼結炉を用いて行うことができる。
すなわち、真空焼結炉とは、密閉された容器中の空気を
ポンプで吸引して真空とすることができ、かつ容器の外
部より熱を加えることができる装置である。Next, the split fibers and the binder are thermally decomposed and removed from the thus obtained metal fiber-containing sheet under an atmosphere gas of vacuum or low vacuum. In order to thermally decompose and remove the split fibers and the binder in the metal fiber-containing sheet, for example, a vacuum sintering furnace can be used.
That is, a vacuum sintering furnace is a device that can suck air from a sealed container with a pump to create a vacuum and can apply heat from outside the container.
【００１２】このような真空焼結炉の内部に金属繊維配
合シートを設置し、内部の空気をポンプで吸引し真空度
１０-2ｔｏｒｒ程度に高めた後、非金属繊維である分割
繊維とバインダーの分解開始温度よりも高い温度で１〜
６時間程度熱を加え、分割繊維及びバインダーを十分燃
焼し、熱分解させ金属繊維配合シートより除去する。こ
の場合は、真空下で金属繊維配合シートに熱を加えた
が、雰囲気ガス下で熱を加えてもよい。雰囲気ガスとし
ては、アルゴン等の不活性ガス、窒素ガスあるいは水素
ガス等が挙げられる。雰囲気ガス下で熱を加えて熱分解
除去する場合は、真空度は１〜４００ｔｏｒｒ程度の低
真空度の雰囲気下でおこなうことが好ましく、該雰囲気
ガスは新旧のガスを入れ替えしながら対流させることが
好ましい。雰囲気ガスの対流量は１０リットル／分以上
が好ましい。なぜならば、雰囲気ガス下で熱を加えると
該雰囲気ガスが熱の伝導体となり、金属繊維配合シート
中から分割繊維及びバインダーを分解しやすくなるから
である。また、雰囲気ガスを対流させることにより熱に
よって分解して金属繊維配合シートよりガス化した分割
繊維とバインダーが、雰囲気ガスと共に真空焼結炉外に
排気されるからである。A metal fiber-containing sheet is placed inside such a vacuum sintering furnace, and air inside the vacuum sintering furnace is sucked by a pump to increase the degree of vacuum to about 10 -2 torr. At a temperature higher than the decomposition onset temperature of
Heat is applied for about 6 hours, the split fibers and the binder are sufficiently burned, pyrolyzed and removed from the metal fiber-containing sheet. In this case, heat is applied to the metal fiber-containing sheet under vacuum, but heat may be applied under atmospheric gas. Examples of the atmosphere gas include an inert gas such as argon, nitrogen gas, and hydrogen gas. When heat is removed by thermal decomposition under an atmosphere gas, it is preferable to perform the treatment in an atmosphere of a low vacuum degree of about 1 to 400 torr, and the atmosphere gas may be convected while replacing the old and new gases. preferable. The flow rate of the atmosphere gas is preferably 10 liters / minute or more. This is because, when heat is applied under an atmosphere gas, the atmosphere gas becomes a heat conductor, and the split fibers and the binder are easily decomposed from the metal fiber-containing sheet. In addition, the split fibers and the binder gasified from the metal fiber-containing sheet by being decomposed by heat by convection of the atmosphere gas are exhausted out of the vacuum sintering furnace together with the atmosphere gas.
【００１３】上記の熱分解のための加熱温度は、金属繊
維が高温度による脆性の発生する温度以下でなければな
らず、例えば、金属繊維にステンレスを使用した場合は
６００℃以下が適正とされる。そして、分割繊維及びバ
インダーの組成に応じて適宜設定されるものであるが、
前記の分割繊維とバインダーの分解開始温度としては、
例えばポリビニルアルコールの場合は、２５０℃以上で
あることから、通常４００℃〜５００℃に加熱すること
が好ましい。４００℃程度で金属繊維配合シートを加熱
するとポリビニルアルコールを形成する分子の主鎖が細
かく切断され低分子で分解し気化しやすくなる。The heating temperature for the above-mentioned thermal decomposition must be lower than the temperature at which the metal fibers become brittle due to the high temperature. For example, when stainless steel is used for the metal fibers, the appropriate temperature is 600 ° C. or lower. You. And it is appropriately set according to the composition of the split fibers and the binder,
As the decomposition start temperature of the split fibers and the binder,
For example, in the case of polyvinyl alcohol, since it is 250 ° C. or higher, it is usually preferable to heat to 400 to 500 ° C. When the metal fiber-containing sheet is heated at about 400 ° C., the main chain of molecules forming polyvinyl alcohol is finely cut, and the molecules are easily decomposed and vaporized with low molecules.
【００１４】次に金属繊維の融点を越えない温度にて繊
維間を焼結する。焼結する工程は前記バインダーを分解
除去した真空焼結炉をそのまま使用してもよいし、水素
ガスによる連続焼結炉を用いて焼結させてもよい。その
際の焼結温度条件として金属繊維の融点近くの温度、例
えばステンレス繊維の場合は約１１００℃を焼結温度に
設定し１〜２時間焼結する。この場合、焼結を真空ある
いは前記雰囲気ガス下でおこなうことが酸化防止のため
に好ましい。Next, the fibers are sintered at a temperature not exceeding the melting point of the metal fibers. In the sintering step, a vacuum sintering furnace in which the binder has been decomposed and removed may be used as it is, or sintering may be performed using a continuous sintering furnace using hydrogen gas. As a sintering temperature condition at that time, a temperature near the melting point of the metal fiber, for example, about 1100 ° C. in the case of stainless steel fiber is set to a sintering temperature and sintering is performed for 1 to 2 hours. In this case, it is preferable to perform the sintering in a vacuum or the above-mentioned atmosphere gas in order to prevent oxidation.
【００１５】本発明では、前記分割繊維とバインダーの
分解除去工程および焼結工程をおこなうことにより均一
で地合いが良好で、しかも十分に耐酸腐食性の優れた任
意の繊維径の金属繊維焼結シートが得られるが、さらに
耐酸腐食性を向上させるために前記焼結直後において、
冷却水あるいは冷却ガスにより急冷させることが好まし
い。前記焼結直後で熱された金属繊維焼結シートを冷却
水あるいは冷却ガスで急冷することによって、金属繊維
内部の組成が調整され、耐酸腐食性および軟化性が保持
される。金属繊維焼結シートを冷却水で冷却するには前
記真空焼結炉の容器の回りに冷却用の配管を施し冷却水
を多量に流水させることにより冷却することができる。
また、冷却ガスを使用する場合は、前記雰囲気ガスを多
量に真空焼結炉内に放出させ該雰囲気ガスを対流させる
ことにより冷却することができる。According to the present invention, a metal fiber sintered sheet having an arbitrary fiber diameter which is uniform, has good formation, and is sufficiently excellent in acid corrosion resistance by performing the step of decomposing and removing the split fibers and the binder and the step of sintering. Is obtained, but immediately after the sintering to further improve the acid corrosion resistance,
It is preferable to perform rapid cooling with cooling water or cooling gas. By quenching the heated metal fiber sheet immediately after the sintering with cooling water or cooling gas, the composition inside the metal fiber is adjusted, and the acid corrosion resistance and the softening property are maintained. In order to cool the metal fiber sintered sheet with cooling water, cooling can be performed by providing a cooling pipe around the vessel of the vacuum sintering furnace and flowing a large amount of cooling water.
When a cooling gas is used, a large amount of the atmosphere gas is discharged into a vacuum sintering furnace, and the atmosphere gas is cooled by convection.
【００１６】[0016]
【実施例】以下、実施例および比較例をもって本発明を
さらに詳細に説明する。 実施例１ 繊維径２０μｍ、繊維長５ｍｍのステンレス繊維（材
質：ＳＵＳ３１６Ｌ、東京製綱社製 商品名：サスミッ
ク）８５重量部、分割繊維（材質：ポリプロピレン／エ
チレンビニルアルコール共重合体、大和紡績社製 商品
名：セパＤＦ−２）５重量部および水中溶解温度７０℃
であるポリビニルアルコール繊維（クラレ社製 商品
名：フィブリボンドＶＰＢ１０５−１）１０重量部から
なるスラリーを湿式抄紙法にて脱水プレス、加熱乾燥し
て坪量１５０ｇ／ｍ2 の金属繊維配合シートを得た。The present invention will be described below in more detail with reference to Examples and Comparative Examples. Example 1 Stainless steel fiber with a fiber diameter of 20 μm and a fiber length of 5 mm (material: SUS316L, manufactured by Tokyo Seimitsu Co., Ltd .: 85 parts by weight), split fiber (material: polypropylene / ethylene vinyl alcohol copolymer, manufactured by Daiwa Spinning Co., Ltd.) Product name: Sepa DF-2) 5 parts by weight and dissolution temperature in water 70 ° C
A slurry comprising 10 parts by weight of polyvinyl alcohol fiber (trade name: Fibribond VPB105-1 manufactured by Kuraray Co., Ltd.) is dewatered by a wet papermaking method and heated and dried to obtain a metal fiber-containing sheet having a basis weight of 150 g / m 2. Was.
【００１７】次いで該シートを真空焼結炉でまず、アル
ゴンガス雰囲気下（真空度：１００ｔｏｒｒ）で４００
℃、２時間加熱して分割繊維とバインダーの分解除去を
おこない、ついでアルゴンガス雰囲気下（真空度：１０
０ｔｏｒｒ）において１０℃／分の速度で１１２０℃ま
で昇温して１１２０℃で１時間焼結処理をおこなった
後、冷却水を真空焼結炉の回りに流水させると共にアル
ゴンガスを５ｋｇｆ／ｃｍ2 の条件で封入させ急冷し、
本発明の製造方法による金属繊維焼結シートを作製し
た。Next, the sheet is first placed in a vacuum sintering furnace under an argon gas atmosphere (degree of vacuum: 100 torr).
C. for 2 hours to decompose and remove the split fibers and the binder, and then under an argon gas atmosphere (degree of vacuum: 10
At 0 torr), the temperature was raised to 1120 ° C. at a rate of 10 ° C./min, and sintering was performed at 1120 ° C. for 1 hour. Then, cooling water was flowed around the vacuum sintering furnace, and argon gas was supplied at 5 kgf / cm 2. Quenched under the conditions of
A metal fiber sintered sheet was produced by the production method of the present invention.
【００１８】実施例２ 実施例１において、ステンレス繊維の配合量を９０重量
部とし、ポリビニルアルコール繊維の配合量を５重量部
とした以外は、全く同様にして本発明の製造方法による
金属繊維焼結シートを作製した。Example 2 The procedure of Example 1 was repeated except that the blending amount of the stainless steel fiber was 90 parts by weight and the blending amount of the polyvinyl alcohol fiber was 5 parts by weight. A binding sheet was produced.
【００１９】実施例３ 実施例１で湿式抄紙法により作製した金属繊維配合シー
トを用いて、該シートを水素ガス雰囲気の連続焼結炉
（メッシュベルト付きろう付け炉）を用い、熱処理温
度：１１２０℃、ベルト速度０．１５ｍ／ｍｉｎ、水素
ガス量４．５ｍ3／ｈｒで熱処理を行ない、本発明の製
造方法による金属繊維焼結シートを作製した。Example 3 Using the metal fiber-containing sheet prepared in Example 1 by the wet papermaking method, the sheet was heated in a continuous sintering furnace (brazing furnace with a mesh belt) in a hydrogen gas atmosphere at a heat treatment temperature of 1120. ° C., belt speed 0.15 m / min, and was heat-treated in a hydrogen gas amount 4.5 m 3 / hr, to prepare a sintered metal fiber sheet according to the production method of the present invention.
【００２０】比較例１ 実施例１において分割繊維に代えてミクロフィブリル化
セルロース（ダイセル化学社製、商品名：セリッシュ）
を用いた以外は、全く同様にして比較用の金属繊維焼結
シートを得た。Comparative Example 1 Microfibrillated cellulose (manufactured by Daicel Chemical Industries, trade name: Selish) in place of the split fiber in Example 1.
A sintered metal fiber sheet for comparison was obtained in exactly the same manner, except that was used.
【００２１】比較例２ 実施例１において分割繊維を用いずにステンレス繊維の
配合量を９０重量部とした以外は、全く同様にして比較
用の金属繊維焼結シートを得た。Comparative Example 2 A metal fiber sintered sheet for comparison was obtained in exactly the same manner as in Example 1 except that the blending amount of the stainless steel fiber was changed to 90 parts by weight without using the split fiber.
【００２２】比較例３ 実施例１においてポリビニルアルコール繊維を用いずに
分割繊維の配合量を１５重量部とした以外は、全く同様
にして比較用の金属繊維焼結シートを得た。Comparative Example 3 A comparative metal fiber sintered sheet was obtained in exactly the same manner as in Example 1, except that the blending amount of the split fibers was changed to 15 parts by weight without using polyvinyl alcohol fibers.
【００２３】上記の実施例１〜３及び比較例１〜３で得
られた金属繊維焼結シートについて、目視にて地合いを
観察し、シートの均一性の評価を行ったところ、実施例
のシートはいずれも均一性に優れたものであった。一
方、比較例１及び２のシートは均一性に劣るものであっ
た。また、実施例においてはいずれも全くトラブルなく
良好な生産性が得られたのに対して、比較例１及び２は
湿紙の強度が弱いために抄紙工程において紙切れが多発
して生産性に問題があり、実用に供することのできるも
のではなかった。また、比較例３においては抄紙工程で
得られた加熱乾燥後の金属繊維配合シートの強度が不十
分で、その後の焼結処理による分割繊維の熱分解工程に
おいて取扱性に問題を有するものであった。With respect to the sintered metal fiber sheets obtained in Examples 1 to 3 and Comparative Examples 1 to 3, the formation was visually observed and the uniformity of the sheets was evaluated. Were all excellent in uniformity. On the other hand, the sheets of Comparative Examples 1 and 2 were poor in uniformity. In addition, in Examples, good productivity was obtained without any trouble, whereas in Comparative Examples 1 and 2, the strength of the wet paper was weak, and paper breakage occurred frequently in the paper making process, resulting in a problem in productivity. However, it could not be put to practical use. Further, in Comparative Example 3, the strength of the heat-dried metal fiber-containing sheet obtained in the papermaking process was insufficient, and there was a problem in handleability in the subsequent pyrolysis process of split fibers by sintering. Was.
【００２４】[0024]
【発明の効果】本発明の金属繊維焼結シートの製造方法
は、抄紙工程で分割繊維を用いることにより、金属繊維
の分散性、均一性が優れた金属繊維焼結シートが得ら
れ、加えて、湿紙強度の良好なシートが形成されるた
め、従来は製造することができなかった金属繊維として
繊維径１０〜５０μｍの太径繊維を用いた坪量２００ｇ
／ｍ2以下の低坪量の金属繊維焼結シートを効率よく生
産できるという効果を有するものである。According to the method for producing a sintered metal fiber sheet of the present invention, by using split fibers in the papermaking process, a sintered metal fiber sheet having excellent dispersibility and uniformity of the metal fiber can be obtained. Since a sheet having good wet paper strength is formed, a basis weight of 200 g using a large-diameter fiber having a fiber diameter of 10 to 50 μm as a metal fiber which could not be conventionally produced was used.
/ M 2 or less, which has the effect of efficiently producing a sintered metal fiber sheet having a low basis weight.
Claims (3)
少なくとも含有する繊維のスラリーを湿式抄紙法により
シート化して金属繊維配合シートを作製し、然るのち分
割繊維及びバインダーを熱分解して除去した後、金属繊
維の融点を越えない温度にて繊維間を焼結することを特
徴とする金属繊維焼結シートの製造方法。1. A sheet of a metal fiber, a split fiber and a slurry of fibers containing at least a binder formed into a sheet by a wet papermaking method to produce a metal fiber-containing sheet, and then the split fiber and the binder are removed by thermal decomposition. A method for producing a sintered metal fiber sheet, comprising sintering fibers at a temperature not exceeding the melting point of the metal fibers.
ン−ビニルアルコール共重合体を構成するものであるこ
とを特徴とする請求項１記載の金属繊維焼結シートの製
造方法。2. The method for producing a metal fiber sintered sheet according to claim 1, wherein the split fibers constitute polypropylene and an ethylene-vinyl alcohol copolymer.
繊維であることを特徴とする請求項１又は２記載の金属
繊維焼結シートの製造方法。3. The method for producing a metal fiber sintered sheet according to claim 1, wherein the binder is a polyvinyl alcohol fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31464597A JP3742717B2 (en) | 1997-10-31 | 1997-10-31 | Method for producing metal fiber sintered sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31464597A JP3742717B2 (en) | 1997-10-31 | 1997-10-31 | Method for producing metal fiber sintered sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11131105A true JPH11131105A (en) | 1999-05-18 |
| JP3742717B2 JP3742717B2 (en) | 2006-02-08 |
Family
ID=18055830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31464597A Expired - Fee Related JP3742717B2 (en) | 1997-10-31 | 1997-10-31 | Method for producing metal fiber sintered sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3742717B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005099940A1 (en) * | 2004-04-15 | 2005-10-27 | Nv Bekaert Sa | Method of manufacturing of a sintered metal fiber medium |
| JP2012503694A (en) * | 2008-09-26 | 2012-02-09 | マン ウント フンメル ゲーエムベーハー | Semi-finished metal products |
| CN109891016A (en) * | 2017-01-16 | 2019-06-14 | 株式会社巴川制纸所 | Metallic fiber nonwoven fabric |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61289200A (en) * | 1985-06-11 | 1986-12-19 | アイシン精機株式会社 | Production of metal fiber sheet |
| JPS63171802A (en) * | 1987-01-08 | 1988-07-15 | Kobe Steel Ltd | Prodoction of porous sintered metallic body |
-
1997
- 1997-10-31 JP JP31464597A patent/JP3742717B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61289200A (en) * | 1985-06-11 | 1986-12-19 | アイシン精機株式会社 | Production of metal fiber sheet |
| JPS63171802A (en) * | 1987-01-08 | 1988-07-15 | Kobe Steel Ltd | Prodoction of porous sintered metallic body |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005099940A1 (en) * | 2004-04-15 | 2005-10-27 | Nv Bekaert Sa | Method of manufacturing of a sintered metal fiber medium |
| JP2012503694A (en) * | 2008-09-26 | 2012-02-09 | マン ウント フンメル ゲーエムベーハー | Semi-finished metal products |
| JP2014177639A (en) * | 2008-09-26 | 2014-09-25 | Mann & Hummel Gmbh | Half-finished metal product |
| CN109891016A (en) * | 2017-01-16 | 2019-06-14 | 株式会社巴川制纸所 | Metallic fiber nonwoven fabric |
| US11124906B2 (en) | 2017-01-16 | 2021-09-21 | Tomoegawa Co., Ltd. | Metal fiber nonwoven fabric |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3742717B2 (en) | 2006-02-08 |
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