JPH04279639A - Porous unit - Google Patents
Porous unitInfo
- Publication number
- JPH04279639A JPH04279639A JP6798491A JP6798491A JPH04279639A JP H04279639 A JPH04279639 A JP H04279639A JP 6798491 A JP6798491 A JP 6798491A JP 6798491 A JP6798491 A JP 6798491A JP H04279639 A JPH04279639 A JP H04279639A
- Authority
- JP
- Japan
- Prior art keywords
- fluororesin
- porous body
- fibrous filler
- porous unit
- volume
- 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
- 239000012765 fibrous filler Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 10
- 239000003365 glass fiber Substances 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 4
- -1 polytetrafluoroethylene Polymers 0.000 abstract description 4
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 3
- 239000004917 carbon fiber Substances 0.000 abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 11
- 239000000843 powder Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000000945 filler Substances 0.000 description 6
- 239000000835 fiber Substances 0.000 description 4
- 239000004760 aramid Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 3
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 3
- 229920006231 aramid fiber Polymers 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Landscapes
- Reinforced Plastic Materials (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はフッ素樹脂を主成分とす
る多孔質体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a porous material whose main component is a fluororesin.
【０００２】0002
【従来の技術】フッ素樹脂は耐熱性、耐薬品性、摺動特
性、電気絶縁性等種々の特性に優れている。そして、フ
ッ素樹脂を所定形状に成形して成る多孔質体は上記諸特
性および気体透過性を利用して、シール材、パッキン、
緩衝材、フィルター等広範囲な適用が期待できる。BACKGROUND OF THE INVENTION Fluororesins have excellent properties such as heat resistance, chemical resistance, sliding properties, and electrical insulation properties. The porous body made by molding fluororesin into a predetermined shape takes advantage of the above properties and gas permeability to be used as a sealing material, packing, etc.
It can be expected to have a wide range of applications such as cushioning materials and filters.
【０００３】かようなフッ素樹脂多孔質体としては、例
えば、特開昭６１−６６７３０号公報に開示されている
ように、ポリテトラフロオロエチレン（以下、ＰＴＦＥ
と称す）粉末を焼成し、この焼成粉末を加圧条件下で所
定形状に成形し、次いでこれをＰＴＦＥの融点以上の温
度に加熱焼成して得られるものが知られている。[0003] As such a porous fluororesin material, for example, polytetrafluoroethylene (hereinafter referred to as PTFE) is used, as disclosed in Japanese Patent Application Laid-Open No. 61-66730.
It is known that the powder is obtained by firing a powder, molding the fired powder into a predetermined shape under pressure, and then heating and firing it to a temperature equal to or higher than the melting point of PTFE.
【０００４】0004
【発明が解決しようとする課題】ところで、このフッ素
樹脂多孔質体はクリープ変形（コールドフロー）が大き
く、大荷重あるいは大締付力の作用する個所での使用に
は不適であるという問題があった。[Problems to be Solved by the Invention] However, this porous fluororesin material has a problem in that it has large creep deformation (cold flow) and is unsuitable for use in locations where large loads or large clamping forces are applied. Ta.
【０００５】[0005]
【課題を解決するための手段】本発明者は従来技術の有
する上記問題を解決するため種々研究の結果、フッ素樹
脂に特定形状のフィラーを配合することにより、耐クリ
ープ性を向上させることができる（クリープ変形量を減
少させることができる）ことを見い出し、本発明を完成
するに至ったものである。[Means for Solving the Problems] As a result of various studies in order to solve the above-mentioned problems of the prior art, the present inventor has found that creep resistance can be improved by blending a filler with a specific shape into a fluororesin. (The amount of creep deformation can be reduced) was discovered, and the present invention was completed.
【０００６】即ち、本発明に係る多孔質体はフッ素樹脂
と繊維状フィラーを必須成分として含み、これら両者の
合計重量中に占めるフッ素樹脂の割合が５０〜９５体積
％である組成物から成ることを特徴とするものである。That is, the porous body according to the present invention is composed of a composition that contains a fluororesin and a fibrous filler as essential components, and the proportion of the fluororesin in the total weight of both is 50 to 95% by volume. It is characterized by:
【０００７】本発明に係る多孔質体はフッ素樹脂と繊維
状フィラーを必須成分とする組成物から成形される。そ
して、これら両成分は両者の合計重量中に占めるフッ素
樹脂の割合が５０〜９５体積％、繊維状フィラーの割合
が５〜５０体積％に成るように配合される。繊維状フィ
ラーの配合量が上記範囲より外れると耐クリープ性の向
上が見られず、所期の目的が達成されないので好ましく
ない。なお、フッ素樹脂としては、通常、ＰＴＦＥが用
いられるが、エチレン−テトラフルオロエチレン共重合
体、テトラフルオロエチレン−ヘキサフルオロプロピレ
ン共重合体、テトラフルオロエチレン−パーフルオロア
ルキルビニルエーテル共重合体（以下、ＰＦＡと称す）
、ポリクロロトリフルオロエチレン（以下、ＰＣＴＦＥ
と称す）等の一種あるいはこれらの混合物を用いてもよ
い。The porous body according to the present invention is molded from a composition containing a fluororesin and a fibrous filler as essential components. These two components are blended so that the proportion of the fluororesin in the total weight of both is 50 to 95% by volume, and the proportion of the fibrous filler is 5 to 50% by volume. If the blending amount of the fibrous filler deviates from the above range, no improvement in creep resistance will be observed and the intended purpose will not be achieved, which is not preferable. Note that PTFE is usually used as the fluororesin, but ethylene-tetrafluoroethylene copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (hereinafter referred to as PFA) )
, polychlorotrifluoroethylene (hereinafter referred to as PCTFE)
) or a mixture thereof may be used.
【０００８】本発明において重要なことはフッ素樹脂と
フィラーを上記のような割合で配合すると共に、該フィ
ラーとして繊維状のものを用いることである。繊維状フ
ィラーとしては、径が約５〜５０μｍ、長さが約５〜５
０００μｍのものが好ましく、とりわけその長さを径で
除した値が約２０〜２００のフィラーを用いるのが好適
であることが判明している。これらフィラーの具体例と
しては炭素繊維、ガラス繊維、チタン酸カリウム繊維等
の無機繊維、アラミド繊維等の有機繊維、窒化ケイ素や
炭化ケイ素等のウィスカーを挙げることができる。[0008] What is important in the present invention is that the fluororesin and the filler are blended in the above-mentioned proportions, and that a fibrous filler is used as the filler. The fibrous filler has a diameter of about 5 to 50 μm and a length of about 5 to 5 μm.
000 μm is preferred, and it has been found that it is especially suitable to use fillers whose length divided by diameter is about 20 to 200. Specific examples of these fillers include inorganic fibers such as carbon fibers, glass fibers, and potassium titanate fibers, organic fibers such as aramid fibers, and whiskers such as silicon nitride and silicon carbide.
【０００９】本発明の多孔質体はフッ素樹脂と繊維状フ
ィラーの両者を必須成分として含むものであるが、その
他の適宜成分、例えば、粒子状充填材、着色剤、発泡剤
等を更に含んでいてもよい。また、フッ素樹脂と繊維状
フィラーとの密着性を向上させるために、フッ素樹脂を
シランカップリング剤やチタネートカップリング剤によ
り表面処理して用いることは好ましい。Although the porous body of the present invention contains both a fluororesin and a fibrous filler as essential components, it may further contain other appropriate components such as a particulate filler, a coloring agent, a blowing agent, etc. good. Further, in order to improve the adhesion between the fluororesin and the fibrous filler, it is preferable to use the fluororesin after surface treatment with a silane coupling agent or a titanate coupling agent.
【００１０】本発明に係る多孔質体は、例えば、上記特
開昭６１−６６７３０号公報に記載された方法により得
ることができる。なお、この方法により得られる多孔質
体の気孔率および気孔の平均孔径は製造条件により変わ
り得るが、通常、気孔率は約５〜４０％、気孔の平均孔
径は約５〜５０μｍである。The porous body according to the present invention can be obtained, for example, by the method described in the above-mentioned Japanese Patent Application Laid-Open No. 61-66730. Although the porosity and average pore diameter of the porous body obtained by this method may vary depending on manufacturing conditions, the porosity is usually about 5 to 40% and the average pore diameter is about 5 to 50 μm.
【００１１】[0011]
【発明の効果】本発明は上記のように構成されており、
フッ素樹脂に繊維状フィラーを配合したので、下記実施
例からも明らかなようにフッ素樹脂多孔質体の耐クリー
プ性を向上できる。[Effects of the Invention] The present invention is configured as described above,
Since the fibrous filler is blended with the fluororesin, the creep resistance of the fluororesin porous body can be improved, as is clear from the following examples.
【００１２】0012
【実施例】以下、実施例により本発明を更に詳細に説明
する。
実施例１
市販のＰＴＦＥ焼成粉末（平均粒子径１００μｍ）８０
体積％に対し、ガラス繊維（直径１０μｍ、長さ１００
μｍ）２０体積％を配合し、ヘンシェルミキサーで均一
に混合する。[Examples] The present invention will be explained in more detail with reference to Examples below. Example 1 Commercially available PTFE calcined powder (average particle size 100 μm) 80
Glass fiber (diameter 10 μm, length 100
μm) 20% by volume and mixed uniformly with a Henschel mixer.
【００１３】この混合組成物を円筒状の金型内に充填し
、室温（約２５℃）において圧力２００ｋｇ／ｃｍ２
で５分間加圧して成形し、これを金型から取り出す。そ
して、この成形体を３７０℃の温度で３時間加熱して焼
成することにより、円柱状多孔質体を得た。この多孔質
体の気孔率は２０％、気孔の平均孔径は２０μｍであっ
た。[0013] This mixed composition was filled into a cylindrical mold, and the pressure was 200 kg/cm2 at room temperature (approximately 25°C).
Press and mold for 5 minutes, then remove from the mold. Then, this molded body was heated and fired at a temperature of 370° C. for 3 hours to obtain a cylindrical porous body. The porosity of this porous body was 20%, and the average pore diameter was 20 μm.
【００１４】該多孔質体のクリープ変形率を測定したと
ころ、５．３％であった。なお、クリープ変形率は外径
２５．６ｍｍ、内径２０ｍｍ、高さ２０ｍｍの筒状試料
を作成し、これに２０ｋｇ／ｃｍ２ の荷重を作用させ
、温度２５０℃で２４時間放置し、該試料の放置前の高
さ（Ｌ１ ）および放置後の高さ（Ｌ２ ）を各々測定
し、Ｌ１ からＬ２ を減じて高さ変形量（Ｓ）を求め
、このＳをＬ１ で除した値に１００を乗じて算出した
。The creep deformation rate of the porous body was measured and found to be 5.3%. The creep deformation rate was determined by preparing a cylindrical sample with an outer diameter of 25.6 mm, an inner diameter of 20 mm, and a height of 20 mm.A load of 20 kg/cm2 was applied to this sample, and the sample was left at a temperature of 250°C for 24 hours. Measure the previous height (L1) and the height after standing (L2), subtract L2 from L1 to find the height deformation (S), divide this S by L1, and multiply the value by 100. Calculated.
【００１５】比較例１
ガラス繊維を用いないこと以外は実施例１と同様に作業
して、気孔率５％、気孔の平均孔径４μｍの多孔質体を
得た。この多孔質体のクリープ変形率は１１．５％であ
った。Comparative Example 1 A porous body having a porosity of 5% and an average pore diameter of 4 μm was obtained by carrying out the same procedure as in Example 1 except that glass fibers were not used. The creep deformation rate of this porous body was 11.5%.
【００１６】比較例２
ＰＴＦＥ焼成粉末９８体積％に対し、ガラス繊維２体積
％を配合すること以外は実施１と同様に作業して、気孔
率６％、気孔の平均孔径５μｍの多孔質体を得た。この
多孔質体のクリープ変形率は１１．２％であった。Comparative Example 2 A porous body with a porosity of 6% and an average pore diameter of 5 μm was prepared in the same manner as in Example 1 except that 2% by volume of glass fiber was blended with 98% by volume of PTFE fired powder. Obtained. The creep deformation rate of this porous body was 11.2%.
【００１７】比較例３
ＰＴＦＥ粉末５０％に対し、ガラス繊維５０％を配合す
ること以外は実施例１と同様に作業して、気孔率４０％
、気孔の平均孔径５５μｍの多孔質体を得た。この多孔
質体のクリープ変形率は１０．４％であった。Comparative Example 3 The same procedure as in Example 1 was carried out except that 50% of glass fiber was mixed with 50% of PTFE powder, and the porosity was 40%.
A porous body having an average pore diameter of 55 μm was obtained. The creep deformation rate of this porous body was 10.4%.
【００１８】実施例２
ＰＴＦＥ焼成粉末５５体積％に対し、直径７μｍ、長さ
２００μｍの炭素繊維４５体積％を配合すること以外は
実施例１と同様に作業して、気孔率３５％、気孔の平均
孔径４５μｍの多孔質体を得た。この多孔質体のクリー
プ変形率は７．８％であった。Example 2 The same procedure as in Example 1 was carried out except that 45 volume % of carbon fibers having a diameter of 7 μm and a length of 200 μm were mixed with 55 volume % of PTFE fired powder. A porous body with an average pore diameter of 45 μm was obtained. The creep deformation rate of this porous body was 7.8%.
【００１９】実施例３
ＰＴＦＥ焼成粉末９５体積％に対し、直径７μｍ、長さ
５００μｍのアラミッド繊維（芳香族ポリアミド繊維）
５体積％を配合すること以外は実施例１と同様に作業し
て、気孔率７％、気孔の平均孔径１０μｍの多孔質体を
得た。この多孔質体のクリープ変形率は８．３％であっ
た。Example 3 Aramid fibers (aromatic polyamide fibers) having a diameter of 7 μm and a length of 500 μm were made using 95% by volume of PTFE fired powder.
A porous body having a porosity of 7% and an average pore diameter of 10 μm was obtained by carrying out the same procedure as in Example 1 except that 5% by volume was added. The creep deformation rate of this porous body was 8.3%.
【００２０】実施例４
ＰＦＡ未焼成粉末８０体積％に対し、直径７μｍ、長さ
５０μｍのチタン酸カリウム繊維２０体積％を配合する
こと以外は実施例１と同様に作業して、気孔率１８％、
気孔の平均孔径２２μｍの多孔質体を得た。この多孔質
体のクリープ変形率は４．７％であった。Example 4 The same procedure as in Example 1 was carried out except that 20 volume % of potassium titanate fibers having a diameter of 7 μm and a length of 50 μm were mixed with 80 volume % of PFA unsintered powder, and the porosity was 18%. ,
A porous body having an average pore diameter of 22 μm was obtained. The creep deformation rate of this porous body was 4.7%.
【００２１】実施例５
ＰＣＴＦＥ未焼成粉末８０体積％に対し、直径５μ、長
さ５０μｍの炭化ケイ素ウィスカー２０体積％を配合す
ること以外は実施例１と同様に作業して、気孔率１５％
、気孔の平均孔径１７μｍの多孔質体を得た。この多孔
質体のクリープ変形率は４．４％であった。Example 5 The same procedure as in Example 1 was carried out except that 20 volume % of silicon carbide whiskers having a diameter of 5 μm and a length of 50 μm were mixed with 80 volume % of PCTFE unsintered powder, and the porosity was 15%.
A porous body having an average pore diameter of 17 μm was obtained. The creep deformation rate of this porous body was 4.4%.
Claims (1)
分として含み、これら両者の合計重量中に占めるフッ素
樹脂の割合が５０〜９５体積％である組成物から成る多
孔質体。1. A porous body comprising a composition containing a fluororesin and a fibrous filler as essential components, in which the proportion of the fluororesin in the total weight of both is 50 to 95% by volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6798491A JPH04279639A (en) | 1991-03-06 | 1991-03-06 | Porous unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6798491A JPH04279639A (en) | 1991-03-06 | 1991-03-06 | Porous unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04279639A true JPH04279639A (en) | 1992-10-05 |
Family
ID=13360758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6798491A Pending JPH04279639A (en) | 1991-03-06 | 1991-03-06 | Porous unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04279639A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0620252A1 (en) * | 1992-11-05 | 1994-10-19 | Daikin Industries, Limited | Polyphenylene sulfide resin composition and process for producing the same |
| US6479578B2 (en) | 1995-10-27 | 2002-11-12 | Daikin Industries, Ltd. | Resin composition |
| WO2005070999A1 (en) * | 2004-01-26 | 2005-08-04 | Junkosha Inc. | Expandable resin composition, expanded article using the same and coaxial insulated cable |
| WO2009110342A1 (en) * | 2008-03-04 | 2009-09-11 | 東京エレクトロン株式会社 | Porous member |
| US20170170645A1 (en) * | 2015-12-15 | 2017-06-15 | Schneider Electric Industries Sas | Sensor for measuring current of the rogowski-torus type, protecting and measuring device and electric circuit breaker including such a sensor |
-
1991
- 1991-03-06 JP JP6798491A patent/JPH04279639A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0892017A2 (en) * | 1992-11-05 | 1999-01-20 | Daikin Industries, Limited | Polyphenylene sulfide resin compositions and process for preparation of same |
| EP0892017A3 (en) * | 1992-11-05 | 1999-05-26 | Daikin Industries, Limited | Polyphenylene sulfide resin compositions and process for preparation of same |
| EP0620252B1 (en) * | 1992-11-05 | 1999-06-02 | Daikin Industries, Limited | Polyphenylene sulfide resin composition and process for producing the same |
| EP0620252A1 (en) * | 1992-11-05 | 1994-10-19 | Daikin Industries, Limited | Polyphenylene sulfide resin composition and process for producing the same |
| CN1318501C (en) * | 1995-10-27 | 2007-05-30 | 大金工业株式会社 | Resin composition, molding produced using same, and process for producing same |
| US6479578B2 (en) | 1995-10-27 | 2002-11-12 | Daikin Industries, Ltd. | Resin composition |
| KR100789760B1 (en) * | 2004-01-26 | 2008-01-03 | 가부시키가이샤 쥰코샤 | Expandable resin composition, expanded article using the same and coaxial insulated cable |
| JP2005206745A (en) * | 2004-01-26 | 2005-08-04 | Junkosha Co Ltd | Expandable resin composition, and foam and coaxial insulation cable using the composition |
| WO2005070999A1 (en) * | 2004-01-26 | 2005-08-04 | Junkosha Inc. | Expandable resin composition, expanded article using the same and coaxial insulated cable |
| US7491887B2 (en) | 2004-01-26 | 2009-02-17 | Junkosha Inc. | Foaming resin composition, foam using the same and coaxial insulated cable |
| JP4540038B2 (en) * | 2004-01-26 | 2010-09-08 | 株式会社潤工社 | Foamed resin composition, foam using the same, and coaxial insulated cable |
| DE112005000157B4 (en) * | 2004-01-26 | 2014-08-14 | Junkosha Inc. | Foaming resin composition, foam and use of the foam |
| WO2009110342A1 (en) * | 2008-03-04 | 2009-09-11 | 東京エレクトロン株式会社 | Porous member |
| US8409482B2 (en) | 2008-03-04 | 2013-04-02 | Tokyo Electron Limited | Porous member |
| JP5198553B2 (en) * | 2008-03-04 | 2013-05-15 | 東京エレクトロン株式会社 | Porous material |
| US20170170645A1 (en) * | 2015-12-15 | 2017-06-15 | Schneider Electric Industries Sas | Sensor for measuring current of the rogowski-torus type, protecting and measuring device and electric circuit breaker including such a sensor |
| CN107015045A (en) * | 2015-12-15 | 2017-08-04 | 施耐德电器工业公司 | Rogowski coil type current metering sensor, protection and measurement apparatus and breaker |
| US10333289B2 (en) * | 2015-12-15 | 2019-06-25 | Schneider Electric Industries Sas | Sensor for measuring current of the Rogowski-torus type, protecting and measuring device and electric circuit breaker including such a sensor |
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