EP4247633A1 - Dichtung - Google Patents
DichtungInfo
- Publication number
- EP4247633A1 EP4247633A1 EP21815932.5A EP21815932A EP4247633A1 EP 4247633 A1 EP4247633 A1 EP 4247633A1 EP 21815932 A EP21815932 A EP 21815932A EP 4247633 A1 EP4247633 A1 EP 4247633A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- graphite
- graphite foil
- coating
- group
- impregnation
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
- B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/16—Layered products comprising a layer of metal next to a particulate layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/04—Coating on the layer surface on a particulate layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/20—Inorganic coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/24—Organic non-macromolecular coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/08—Dimensions, e.g. volume
- B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
- B32B2309/105—Thickness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2313/00—Elements other than metals
- B32B2313/04—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2581/00—Seals; Sealing equipment; Gaskets
Definitions
- the present invention relates to a seal for flange connections, as well as the manufacture of the seal and its use.
- Graphite foil is produced by thermal expansion of a graphite intercalation compound and subsequent compression of the accordion-shaped particles obtained by the expansion. When compressed under pressure, these particles are interlocked with one another in such a way that stable, flexible flat structures such as foils or plates can be produced from them without the addition of binders.
- Graphite foil is characterized by resistance to high temperatures and aggressive media, relatively low permeability for fluids, high compressibility, good resilience and a very low tendency to creep under pressure. These properties justify the suitability of graphite foil as a sealing material.
- a method for the production of layered composite materials from a plurality of alternating metal and graphite layers is known from European patent specification EP 0 616 884.
- An insoluble, adhesive-free composite produced by applying a thin layer of a surface-active substance from the group of organosilicon compounds, perfluorinated compounds or metal soaps to at least one of the surfaces to be bonded, and then bringing the surfaces to be bonded into contact and by applying pressure and heat to one another get connected.
- a disadvantage of the seals described in the prior art is the adhesive effect of the seals when used in flanges, for example, so that they can only be replaced with difficulty.
- the object of the present invention is to provide a seal which is non-stick in use, as well as a method for producing the non-stick seal.
- a gasket for flange connections comprising a layer of impregnated and coated graphite foil or a composite of at least two layers of graphite foil, reinforcement being applied between two layers of graphite foil and the outer surfaces of the composite having an impregnation and a coating.
- the graphite foil comprises expanded graphite.
- expanded graphite foils expanded graphite with a worm-like structure must first be produced.
- graphite such as natural graphite
- an intercalate such as nitric acid or sulfuric acid
- Expanded graphite represents graphite that is expanded, for example, by a factor of 80 or more compared to natural graphite in the plane perpendicular to the hexagonal carbon layers. Due to the expansion stands out more expanded Graphite is characterized by excellent formability and good gearability. The expanded graphite can be pressed into sheet form using pressure.
- Graphite foils exhibit high temperature and media resistance.
- the impregnation is selected from the group of paraffins, long-chain hydrocarbons or mixtures thereof, preferably vaseline. Petroleum jelly is preferred because it has the property of being less sticky, but does not prevent sticking.
- long-chain hydrocarbons are understood to mean, for example, alkanes with the general empirical formula C n H2n+2, where the number n is between 18 and 32 and the molar mass is therefore between 275 and 600 grams per mole.
- the coating is selected from the group of fatty soaps, mica, graphite powder, talc or mixtures thereof, preferably fatty soaps.
- fatty soaps are understood to mean sodium or potassium salts of fatty acids, but also fatty acids of the metals Li, Ca, Mg.
- Fatty acids are understood as meaning saturated monocarboxylic acids of the empirical formula C n H2n+iCOOH, such as palmitic acid, stearic acid, with a carbon chain length of C7-C21 being preferred.
- Magnesium stearate is particularly preferred because magnesium stearate is non-toxic and is a highly effective release agent.
- the coating prevents the seal from sticking, while the seal is applied as an active release agent without adhesive. This has the advantage that sticking in the flange is prevented due to the application without adhesive.
- Mixtures of fatty soaps and graphite powder are particularly advantageous, since an even greater separating effect is achieved in this way, and the graphite powder also achieves a separating effect when the seal is used at high temperatures.
- the reinforcement is a metal insert.
- the metal insert is selected from the group of sheet metal, perforated sheet metal or expanded sheet metal.
- the metal insert advantageously has a thickness of 50 ⁇ m to 150 ⁇ m.
- the metal insert is selected from the group of high-grade steel, steel, iron, aluminum, nickel, copper, titanium or zinc or alloys of nickel, copper, aluminum or zinc, preferably high-grade steel.
- Another object of the invention is a method for producing the seal comprising the following steps: a) providing a graphite foil, b) providing the impregnation and the coating, c) dispersing the coating in the impregnation, d) applying the coating obtained in step c). dispersion on the outside of the graphite foil provided in step a), e) storing the graphite foil from step d) for 2 h to 24 h at temperatures of 80 to 180° C., preferably 105° C.
- the graphite foil provided in step a) can be graphite foil plates or rolled goods. If roll goods are used, step c) is followed by cutting or punching into panels of any size.
- a reinforcement is additionally provided in step a), in step d) a dispersion is applied only to one outside and step e) is followed by steps f) stacking of the graphite foil obtained in step e), the coating on the respective outside of the stack and reinforcement is arranged between two graphite foils, g) pressing of the stack obtained in step f) down to a 20% smaller thickness.
- the impregnation and coating and subsequent storage can be carried out both in the batch process (individually cut layers) or in the roll-to-roll process, i.e. in the Continuous process to be carried out.
- the material is cut into individual layers.
- the impregnation impregnates the graphite foil and is distributed homogeneously in the graphite foil, with the coating remaining on the surface of the graphite foil.
- the impregnation provided in step b) is selected from the group of paraffins, long-chain hydrocarbons or mixtures thereof, preferably vaseline.
- the coating provided in step b) is selected from the group of fatty soaps, mica, graphite powder or talc or mixtures thereof, preferably fatty soaps.
- the one layer of graphite foil provided or the at least two layers of graphite foil in step a) has a density of 0.7 to 1.3 g/cm 3 , preferably 0.7 g/cm 3 . If the density is greater than 1.3 g/cm 3 , the flexibility of the graphite foil to compensate for unevenness is no longer given. If the density is less than 0.7 g/cm 3 , the stability of the film is no longer sufficient. A density of .7 g/cm 3 is preferred, since this density gives the graphite foil particularly good flexibility and the foil compensates for unevenness particularly well in use.
- the at least one reinforcement provided in step a) is a metal insert.
- the metal insert advantageously has a thickness of 50 to 150 ⁇ m.
- Figure 1 shows a gasket for flange connections.
- Figure 2 shows a gasket for flange connections
- FIG. 1 shows a graphite foil (1) with an impregnation (2) and a coating (3) on both sides of the graphite foil.
- FIG. 2 shows two layers of graphite foil (1), a reinforcement (4) being applied between two layers of graphite foil (1) and the outer surfaces of the composite having an impregnation (2) and a coating (3).
- Two layers of graphite foil (1000 mm ⁇ 1000 mm) with a density of 0.7 g/cm 3 are each coated on one side with a dispersion of petroleum jelly and magnesium stearate (2% by weight of magnesium stearate in petroleum jelly), with 1 to 10% by weight of petroleum jelly - ne/magnesium stearate is applied to the graphite foil.
- This coated graphite foil is then stored at 105° C. for 24 h.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Gasket Seals (AREA)
- Sealing Material Composition (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020214437.0A DE102020214437A1 (de) | 2020-11-17 | 2020-11-17 | Dichtung |
| PCT/EP2021/081668 WO2022106349A1 (de) | 2020-11-17 | 2021-11-15 | Dichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4247633A1 true EP4247633A1 (de) | 2023-09-27 |
Family
ID=81345458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21815932.5A Pending EP4247633A1 (de) | 2020-11-17 | 2021-11-15 | Dichtung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240001650A1 (de) |
| EP (1) | EP4247633A1 (de) |
| JP (2) | JP2023549884A (de) |
| DE (1) | DE102020214437A1 (de) |
| WO (1) | WO2022106349A1 (de) |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3226661C2 (de) * | 1982-07-16 | 1984-08-16 | Goetze Ag, 5093 Burscheid | Flachdichtung, insbesondere Zylinderkopfdichtung |
| DE3339434C2 (de) | 1983-10-29 | 1986-09-04 | Elring Dichtungswerke Gmbh, 7012 Fellbach | Flachdichtungsplatte und Verfahren zu deren Herstellung |
| JPH0462042A (ja) * | 1990-06-25 | 1992-02-27 | Gasket Seisakusho:Yugen | 複合ガスケット材料 |
| DE4309700C2 (de) | 1993-03-25 | 1995-02-23 | Sigri Great Lakes Carbon Gmbh | Verfahren zur Herstellung eines Schichtstoffes aus Metall und Graphit |
| JP3028171B2 (ja) * | 1993-08-31 | 2000-04-04 | 日本ピラー工業株式会社 | 複合ガスケット |
| JPH0727231A (ja) * | 1993-07-16 | 1995-01-27 | Nippon Valqua Ind Ltd | 膨張黒鉛シートガスケット |
| JP2645800B2 (ja) * | 1993-12-14 | 1997-08-25 | 日本ピラー工業株式会社 | 膨張黒鉛製シール素材およびその製造方法ならびにガスケット用シート |
| US5722670A (en) * | 1996-09-06 | 1998-03-03 | Fel-Pro Incorporated | Sealing assembly and multi-layer gasket for resisting facing delamination and degradation |
| DE19804283B4 (de) * | 1998-02-04 | 2006-10-12 | Sgl Carbon Ag | Metallverstärkter Graphitschichtstoff |
| DE19828789A1 (de) * | 1998-06-27 | 1999-12-30 | Sgl Technik Gmbh | Packungsgarn aus Graphit- und Plastikfolie |
| US6245400B1 (en) | 1998-10-07 | 2001-06-12 | Ucar Graph-Tech Inc. | Flexible graphite with non-carrier pressure sensitive adhesive backing and release liner |
| DE10003927A1 (de) | 2000-01-29 | 2001-08-02 | Sgl Technik Gmbh | Verfahren zum Herstellen von expandierbaren Graphiteinlagerungsverbindungen unter Verwendung von Phosphorsäuren |
| DE10316262A1 (de) * | 2003-04-08 | 2004-11-11 | Sgl Carbon Ag | Dichtung für Flanschverbindungen |
| EP1746077A1 (de) * | 2005-06-21 | 2007-01-24 | Sgl Carbon Ag | Metallbeschichtete Graphitfolie |
| CN101568753B (zh) * | 2006-12-22 | 2013-05-01 | Sgl碳股份公司 | 密封材料 |
| DE102007037433B4 (de) | 2007-08-08 | 2015-08-27 | Sgl Carbon Se | Verwendung eines Schichtstoffs als Komponente in Brennstoffzellen oder Redox-Flow-Batterien |
| CN204592640U (zh) * | 2015-02-15 | 2015-08-26 | 岱山县奥赛密封件厂 | 排气管接口垫片 |
| DE102016012178A1 (de) | 2016-10-11 | 2018-04-12 | HAFF-Dichtungen GmbH | Dichtung, insbesondere Flachdichtung aus Graphit |
-
2020
- 2020-11-17 DE DE102020214437.0A patent/DE102020214437A1/de active Pending
-
2021
- 2021-11-15 EP EP21815932.5A patent/EP4247633A1/de active Pending
- 2021-11-15 JP JP2023529094A patent/JP2023549884A/ja active Pending
- 2021-11-15 US US18/252,564 patent/US20240001650A1/en active Pending
- 2021-11-15 WO PCT/EP2021/081668 patent/WO2022106349A1/de not_active Ceased
-
2025
- 2025-12-17 JP JP2025260719A patent/JP2026034643A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023549884A (ja) | 2023-11-29 |
| JP2026034643A (ja) | 2026-02-27 |
| WO2022106349A1 (de) | 2022-05-27 |
| US20240001650A1 (en) | 2024-01-04 |
| DE102020214437A1 (de) | 2022-05-19 |
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