JPH026793B2 - - Google Patents
Info
- Publication number
- JPH026793B2 JPH026793B2 JP54100481A JP10048179A JPH026793B2 JP H026793 B2 JPH026793 B2 JP H026793B2 JP 54100481 A JP54100481 A JP 54100481A JP 10048179 A JP10048179 A JP 10048179A JP H026793 B2 JPH026793 B2 JP H026793B2
- Authority
- JP
- Japan
- Prior art keywords
- packing material
- tetrafluoroethylene resin
- porous
- packing
- main body
- 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
- 238000012856 packing Methods 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 31
- 239000011347 resin Substances 0.000 claims description 21
- 229920005989 resin Polymers 0.000 claims description 21
- 239000000314 lubricant Substances 0.000 claims description 11
- 239000001993 wax Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 229940057995 liquid paraffin Drugs 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims 2
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 claims 1
- 238000010304 firing Methods 0.000 claims 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 18
- 238000007789 sealing Methods 0.000 description 13
- 239000012530 fluid Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 235000014593 oils and fats Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Gasket Seals (AREA)
- Sealing Devices (AREA)
- Sealing Material Composition (AREA)
Description
【発明の詳細な説明】
本発明は、流体機器に装着され、流体を密封す
る種々のパツキンに適用されるパツキン材に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a packing material that is attached to fluid equipment and applied to various packings for sealing fluid.
従来のパツキン材の一例としては、四弗化エチ
レン樹脂の単体のものがある。これをＶ形或いは
コーン形等の形状となしたパツキンは、通常、締
付力や内部流体圧力等の負荷を与えることによつ
て、適宜の高面圧が発生するように施こしたパツ
キンの密封部にて、密封機能を奏する構造となし
ており、いわゆる自封構造と称されるパツキンが
常識的に用いられている。しかしながら係るパツ
キンでは、例えば機器回転軸との接触部分にはグ
リース状のシーラントを塗布する等してパツキン
材の摩耗を減らし密封機能を発揮できるよう補助
しなければならないという困難さがあつた。さら
に係る自封構造でない四弗化エチレン樹脂からな
るパツキン、例えばスコア形（断面四角）のパツ
キンでは、密封面圧を高めることが出来ず、密封
することは一層困難であり、また特公昭45―
28644号公報にみられる如く、粉末体即ち弗素系
樹脂の粉末を10Kg／cm2〜50Kg／cm2（m2当りに換算
して、100ton／m2〜500ton／m2面圧力）もの高圧
力を負荷して極くわずかに多孔質状にしたパツキ
ン材も開示されているが、、パツキンとしての軟
質性に劣る点、粉末成形であるが故に粒子欠損に
よる耐摩耗に劣る点、成形体内部と外表面部とで
は、若干存在するポーラスの分布状態が不均一で
ある憾もある。 An example of a conventional packing material is one made of tetrafluoroethylene resin. The packing is made into a V shape or a cone shape, and is usually made by applying loads such as tightening force or internal fluid pressure to generate an appropriate high surface pressure. The sealing part has a structure that performs a sealing function, and a gasket with a so-called self-sealing structure is commonly used. However, with such a seal, there is a difficulty in that it is necessary to apply a grease-like sealant, for example, to the part that comes into contact with the rotating shaft of the device to reduce wear on the seal material and help it perform its sealing function. Furthermore, packings made of tetrafluoroethylene resin that do not have a self-sealing structure, such as score-shaped (square cross-section) packings, cannot increase the sealing surface pressure and are more difficult to seal.
As seen in Publication No. 28644, powder of fluororesin is subjected to high pressure of 10Kg/cm 2 to 50Kg/cm 2 (converted to 100ton/m 2 to 500ton/m 2 surface pressure per m 2 ). A packing material that is made slightly porous by applying a load of There is also a problem that the distribution of some existing pores is uneven between the outer surface and the outer surface.
一方、フイルターの技術分野において孔径がミ
クロン単位の微細な多孔を有する四弗化エチレン
樹脂はあるが、これをパツキン材として適用して
も、前述した通常の四弗化エチレン樹脂からなる
パツキン材とかわりなく、しかも微細多孔を有す
る四弗化エチレン樹脂に油滑材料を所望量含浸せ
しめることはできなかつた。 On the other hand, in the technical field of filters, there are tetrafluoroethylene resins that have minute pores with pore diameters in the micron unit, but even if this is applied as a packing material, it will not be the same as the packing material made of the ordinary tetrafluoroethylene resin mentioned above. However, it was not possible to impregnate the desired amount of the lubricating material into the tetrafluoroethylene resin having micro pores.
本発明に係るパツキン材は、多孔質四弗化エチ
レン樹脂を主体となすものである。この主体であ
る多孔質四弗化エチレン樹脂は、特願昭53―
75189号（特開昭55―2060号公報参照、名称：多
孔質四弗化エチレン樹脂及びその製造方法）で開
示されたものを利用したのであり、それまでには
全くなかつた性状を有する軽石状組識を有する多
孔質四弗化エチレン樹脂を用いるものである。 The packing material according to the present invention is mainly composed of porous tetrafluoroethylene resin. The main component of this material, porous tetrafluoroethylene resin, was developed in a patent application filed in 1983.
75189 (see JP-A-55-2060, name: porous tetrafluoroethylene resin and method for producing the same), and used the material disclosed in JP-A-55-2060. It uses porous tetrafluoroethylene resin having a structure.
即ち、主体となす多孔質四弗化エチレン樹脂
は、先の出願、特願昭53―75189号にて公開して
いる通り、未焼成の四弗化エチレン樹脂の短繊維
のみを、０〜500Kg／m2の低面圧で負荷したまま
焼成一体化したものであり、その性状は短繊維が
多孔構造となつて互に強固に結合した状態となつ
ており、高い弾性力有するとともに引張り、圧縮
に対する強度がすぐれている。また四弗化エチレ
ン樹脂のみから成るため熱膨張率は10×10-5／℃
と、カーボン等の充填材を混入した成形体よりも
大きく、かつ高温における高いシール性能を有す
ることが期待出来るのみならず、摩擦係数はカー
ボン等の充填材を混入したものより低いため、摺
動性能においてもトルクが低くなるという優れた
特性を有している。そして疎水性を有し吸水率の
小さい特性を有するが、その後の研究の結果、
“ろう（wax）”や油脂等については非常に含浸し
やすいことが確認され、パツキン材としては好適
であることがわかつた。 In other words, the main porous tetrafluoroethylene resin is made up of unfired tetrafluoroethylene resin short fibers weighing 0 to 500 kg, as disclosed in the previous application, Japanese Patent Application No. 75189/1983. It is a product that is baked and integrated under a low surface pressure of / m2 , and its properties are that the short fibers have a porous structure and are strongly bonded to each other, and have high elasticity and resistance to tension and compression. It has excellent strength against Also, since it is made only of tetrafluoroethylene resin, the coefficient of thermal expansion is 10×10 -5 /℃.
Not only is it larger than a molded product containing fillers such as carbon, and can be expected to have high sealing performance at high temperatures, but the coefficient of friction is lower than that of molded products containing fillers such as carbon, so it is easy to slide. In terms of performance, it also has an excellent characteristic of low torque. It has hydrophobic properties and low water absorption, but as a result of subsequent research,
It was confirmed that it was very easy to impregnate wax, oil, etc., and it was found to be suitable as a packing material.
本発明は前述した事情をもとにしてなされ、諸
特性に優れたパツキン材を提供する。 The present invention was made based on the above-mentioned circumstances, and provides a packing material with excellent various properties.
以下本発明をされに詳細に説明してゆく。 The present invention will be explained in detail below.
本発明に係るパツキン材は、前述した多孔質四
弗化エチレン樹脂を主体となし、混合潤滑材を５
〜10％（重量）の範囲内で、主体の多孔部分に含
浸せしめたものである。この混合潤滑剤は、木蝋
や高粘度三弗化塩化エチレン低重合物（固形型三
弗化塩化エチレン低重合物、動粘度1600〜3000C.
S.、商品名ダイフロイル）等の固形蝋と、流動パ
ラフイン若しくは低粘度三弗化塩化エチレン低重
合物（動粘度にて５〜1500C.S.の範囲にあるもの
を示す。液状型）の何れかから選ばれる液状油脂
とを混合したものである。その目的とするところ
は、液状油脂については、常温におけるパツキン
材としての密封性を高め、発生するトルクの軽減
をはかることができ、他方固形ろうについては、
高温雰囲気中での密封性と潤滑とを良好にし、パ
ツキン材の主体である多孔質四弗化エチレン樹脂
の摩耗の低減をはかることができる。このような
混合潤滑剤が５％（重量）以下ならば、潤滑剤の
摺動性能に及ぼす著しい効果は認められず、10％
（重量）以上であれば、密封面圧が低下し密封性
の低下を招くことが判明した。然るに、この様な
混合潤滑剤を５〜10％（重量）の範囲にて前述し
た主体の多孔部分に含浸したパツキン材は、必要
応じて適宜パツキン材の表面に混合潤滑材がにじ
み出て、一挙に混合潤滑剤が流出してしまう虞れ
が全くなく、その保持寿命が長くなるとともに、
低温域から高温域に到る幅広い温度領域にて安定
した摺動性能と密封性能が得られた。 The packing material according to the present invention is mainly composed of the above-mentioned porous tetrafluoroethylene resin, and contains 5% of the mixed lubricant.
The porous portions of the main body are impregnated within the range of ~10% (by weight). This mixed lubricant is made of wax, high viscosity trifluorochloride ethylene low polymer (solid type trifluorochloride ethylene low polymer, kinematic viscosity 1600-3000C).
Solid wax such as S.S., trade name Daifloil), liquid paraffin or low viscosity trifluorochloride ethylene low polymer (indicates a kinematic viscosity in the range of 5 to 1500 C.S., liquid type). It is a mixture of liquid oils and fats selected from the following. The purpose of this is to improve the sealing performance of liquid oils and fats as a packing material at room temperature and reduce the generated torque, while for solid waxes,
It is possible to improve sealing performance and lubrication in a high-temperature atmosphere, and reduce wear of the porous tetrafluoroethylene resin, which is the main component of the packing material. If such a mixed lubricant is less than 5% (by weight), no significant effect on the sliding performance of the lubricant is observed;
(weight) or more, it was found that the sealing surface pressure decreases, leading to a decrease in sealing performance. However, in a packing material in which the above-mentioned porous parts of the main body are impregnated with such a mixed lubricant in a range of 5 to 10% (by weight), the mixed lubricant oozes out onto the surface of the packing material as necessary, and the lubricant mixture oozes out at once on the surface of the packing material. There is no risk of the mixed lubricant leaking out, and its retention life is extended.
Stable sliding performance and sealing performance were obtained over a wide temperature range from low to high temperatures.
尚、本発明に係るパツキン材の主体は、所望す
る形状寸法に簡便になすことができるものであ
る。例えば断面が矩形の円環状の主体となす場
合、所望厚さの板状物を作つておき、これを打抜
き加工して、多数個を一挙に得ることができる。
或いは、円筒状に作つておき、一定間隔で順次ナ
イフ切削してもよく、または最初から所望の形状
寸法に焼成一体化して、個々に主体を得ることが
できる。 The main body of the packing material according to the present invention is one that can be easily formed into a desired shape and size. For example, if the main body is annular with a rectangular cross section, a large number of pieces can be obtained at once by making a plate-like material with a desired thickness and punching it out.
Alternatively, it may be made into a cylindrical shape and successively cut with a knife at regular intervals, or it may be fired and integrated into the desired shape and size from the beginning to obtain the main body individually.
未焼成の四弗化エチレン樹脂からなる短繊維
（廃材を開砕）を焼成一体化して内外32mmφ、外
径48mmφ、厚さ7.5mmの円環状パツキン主体を得、
これに混合潤滑剤として木蝋と流動パラフインが
重量比にて同量混合したものをパツキン主体に対
して７％（重量）含浸したパツキン材Ａを試作し
た。このパツキン材Ａと比較するために、同寸法
の四弗化エチレン樹脂のデイスパージヨンを含浸
した石綿編組からなる既存パツキンＢを選んだ。
そして、流体：窒素ガス（N2）、流体温度：150
℃、流体圧力：20cm2、の条件下にて5000回の往復
動（ストローク：42mm）試験を行なつた。（バル
ブ用パツキンとしてのバルブステムを意図した試
験）そして、その結果は第１図と第２図で示し
た。
Short fibers (crushed waste material) made of unfired tetrafluoroethylene resin are fired and integrated to obtain an annular packing main body with an inner and outer diameter of 32 mm, an outer diameter of 48 mm, and a thickness of 7.5 mm.
Packing material A was prepared by impregnating the main body of the packing with 7% (by weight) of a mixture of wax and liquid paraffin in the same weight ratio as a mixed lubricant. In order to compare this packing material A, we selected an existing packing B made of asbestos braid impregnated with a dispersion of tetrafluoroethylene resin and having the same dimensions.
And fluid: nitrogen gas ( N2 ), fluid temperature: 150
A reciprocating test was conducted 5000 times (stroke: 42 mm) under the conditions of °C and fluid pressure: 20 cm 2 . (Test intended for valve stems as valve packing) The results are shown in FIGS. 1 and 2.
第１図は往復回数と軸トルクの関係、第２図は
往復回数と洩れ量の関係を各々示す。 FIG. 1 shows the relationship between the number of reciprocations and shaft torque, and FIG. 2 shows the relationship between the number of reciprocations and the amount of leakage.
以上、実施例で示したように、本発明のパツキ
ン材は非常にパツキン材として優れていることが
わかつた。特に耐久性において良好であり、往復
回数が500回以上繰り返えされ後において効果を
発揮せしめる長寿命用のパツキン材としても適し
ていることがわかつた。 As shown in the Examples above, it was found that the packing material of the present invention is extremely excellent as a packing material. It was found that it has particularly good durability and is suitable as a long-life packing material that exhibits its effectiveness even after being reciprocated more than 500 times.
さらに本発明ではパツキン材の主体として、未
焼成四弗化エチレン樹脂のチヨツプトフアイバー
を用いており、かつ最大0.05Kg／cm2という極小成
形面圧力にてホツトコイニングにて得られたもの
なので、従来にない独特な性状をもつ多孔質四弗
化エチレン樹脂体に、前述した２種類の混合潤滑
剤を配合せしめた構成のパツキン材であるため、
含浸バインダーを保持できない従来パツキンを組
合せて用いることもでき、また弗素樹脂製Ｖリン
グと合せて潤滑性能を向上できるという利点もあ
り、しかもこの主体は廃材を利用でき、焼成一体
化するのみなので非常にコスト安に生産でき、し
かも所望するあらゆる形状寸法に量産できる。 Furthermore, in the present invention, the main part of the packing material is a chopped fiber made of unfired tetrafluoroethylene resin, which is obtained by hot coining at a maximum molding surface pressure of 0.05 kg/ cm2 . Because it is a packing material composed of a porous tetrafluoroethylene resin body with unique properties never seen before, and the two types of mixed lubricants mentioned above,
It also has the advantage of being able to be used in combination with conventional gaskets that cannot hold the impregnated binder, and improving the lubrication performance when combined with fluororesin V-rings.Furthermore, this material can be made from waste materials and is only baked and integrated, making it very easy to use. It can be produced at low cost and can be mass-produced in any desired shape and size.
図面は何れも本発明を説明するためのグラフ図
であり、第１図は往復回数と軸トルクとの関係を
示し、第２図は往復回数と洩れ量との関係を示す
ものである。
Ａ……パツキン材（本発明に係る）、Ｂ……既
存パツキン。
The drawings are all graphs for explaining the present invention; FIG. 1 shows the relationship between the number of reciprocations and the shaft torque, and FIG. 2 shows the relationship between the number of reciprocations and the amount of leakage. A... Packing material (according to the present invention), B... Existing packing material.
Claims (1)
を０〜500Kg／m2の範囲で加圧焼成一体化した多
孔質四弗化エチレン樹脂を主体となし、固形ろう
と、流動パラフイン若しくは低粘度三弗化塩化エ
チレン低重合物の何れかから選ばれる液状油脂と
の混合潤滑剤を５〜10％（重量）の範囲にて前記
主体の多孔部分に含浸せしめたことを特徴とする
パツキン材。1 Mainly composed of porous polytetrafluoroethylene resin, which is made by pressurizing and firing only short fibers of unfired polytetrafluoroethylene resin in the range of 0 to 500 kg/ m2 , and is made of solid wax, liquid paraffin, or low-viscosity resin. A packing material characterized in that the porous portions of the main body are impregnated with a lubricant mixed with a liquid oil selected from fluorochlorinated ethylene low polymers in a range of 5 to 10% (by weight).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10048179A JPS5624261A (en) | 1979-08-06 | 1979-08-06 | Packing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10048179A JPS5624261A (en) | 1979-08-06 | 1979-08-06 | Packing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5624261A JPS5624261A (en) | 1981-03-07 |
| JPH026793B2 true JPH026793B2 (en) | 1990-02-13 |
Family
ID=14275105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10048179A Granted JPS5624261A (en) | 1979-08-06 | 1979-08-06 | Packing material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5624261A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0328361U (en) * | 1989-07-27 | 1991-03-20 | ||
| JPH05476U (en) * | 1991-06-24 | 1993-01-08 | 益充 五味 | Document spelling fasteners and files using the fasteners |
| ES2196022T3 (en) * | 1993-12-17 | 2003-12-16 | Mct Brattberg Aktiebolag | PACKAGING OF AUTOLUBRICANT PASSENGERS. |
| JPH08209114A (en) * | 1995-01-30 | 1996-08-13 | Nec Corp | Elastic sealing member |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4927145U (en) * | 1972-06-13 | 1974-03-08 | ||
| JPS52144063A (en) * | 1976-05-26 | 1977-12-01 | Nitto Electric Ind Co | Method of manufacturing sealing materials |
| US4157328A (en) * | 1976-09-18 | 1979-06-05 | Hoechst Aktiengesellschaft | Sealing material on the basis of polytetrafluoroethylene fibers |
-
1979
- 1979-08-06 JP JP10048179A patent/JPS5624261A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4927145U (en) * | 1972-06-13 | 1974-03-08 | ||
| JPS52144063A (en) * | 1976-05-26 | 1977-12-01 | Nitto Electric Ind Co | Method of manufacturing sealing materials |
| US4157328A (en) * | 1976-09-18 | 1979-06-05 | Hoechst Aktiengesellschaft | Sealing material on the basis of polytetrafluoroethylene fibers |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5624261A (en) | 1981-03-07 |
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