Flexible graphite is a soft sheet form of compressed natural graphite made from exfoliated mineral flake(crystalline) graphite. Due to its flexible texture, it is referred to as flexible graphite to distinguish it from other forms of graphite materials: flake graphite, amorphous graphite, artificial graphite (hard graphite), graphite electrodes, graphite/carbon fiber, etc.

　　standard flexible graphite sheet product suitable for most industry applications. As gasket material, it is usually fabricated into Graphite Laminate, reinforced graphite sheet and widely used in fluid sealing applications: flange gasket, spiral wound gasket, heat exchanger gasket, etc. It can also be used as solid lubricant in metal stamping and forming applications, or as heat liner in industry furnaces and other heating devices.

　　Sometimes flexible graphite is also referred to by a manufacturer's brand name like grafoil. Flexible graphite sheet is made with pure expanded graphite. standard flexible graphite sheet product has a high purity of 99.0% carbon content. Higher carbon content gives the flexible graphite foil better chemical resistance, better thermal conductivity, and better sealing ability.

　　graphite gasket sheet is made with pure flexible graphite sheet reinforced with glass fiber insert. The both sides are pure graphite sheet, the reinforced material is one layer or two layers of glass fiber. The graphite layer and glass fiber are jointed together with glue bonded. Reinforced graphite gasket is cut or molded from our reinforced graphite sheets. Inner and outer eyelet with SS304 or SS316.

　　Graphite gaskets having excellent corrosion resistance, high temperature resistance, excellent compressibility and recovery, widely used for piping, valves, pumps, pressure vessels, heat exchangers, condensers, generators, compressed machine, exhaust pipes, chillers. Graphite reinforced gasket can also cut into any shape of complex gaskets such as water gauge gasket, full face flange gasket and automotive cylinder head gasket.

　　Reinforced materials: stainless steel tanged, stainless steel foil, tinplate, wire mesh, glass fiber and and Aluminium foil.

　　The flexible graphite sheet and rolls is made from high purity graphite, it is used can be expanded graphite particles formed by the high temperature expansion of repression, it retains the high temperature crystalline flake graphite, corrosion resistant, self lubricating, etc.The flexible graphite roll is made by flake graphite with high carbon content, which is gone through chemical treatment, expanding under high temperature and then rolling.

　　The flexible graphite sheet has the characteristics of high temperature resistance, corrosion resistance and good elasticity.Flexible graphite sheet sevrve as the basic material for making all kinds of reinforced graphite sheets, graphite tapes, packing and sealing gaskets. Workingtemperature-200~650ºC(in air),-200~3000ºC(in non-oxidizing media).

　　Flexible graphite sheet, normally we call it "Expanded Graphite Sheet", it is made of nature graphite flake. Expanded graphite rolls is chemically treated graphite interaction compound.This interaction compound is then rapidly heated to decomposition.the result is a rapid expansion of the particle size. Then they are formed into graphite sheets by rolling.

　　Graphite sheet is a kind of thermal inferface materials with a high performance and low cost. It is used in the occasion of without electrical insulation. It has low thermal resistivity,light weight features and uniform heat conduction along the X,Y direction. Its special unique grain-oriented, lamellar structure will be well adapted to any surface, thus make heat conduction to optimization.its surface can be combined with metal, plastic, pressure-sensitive-adhesive materials to meet more design function and needs. This product can be cutted into special sizes according to customer requirements.

　　High thermal natural graphite sheet is new thermal conductive material, with heat conduction along two directions, shield heat and components while improving consumer electronic products performance

　　We also can produce the heat-conductive synthetic graphite sheet.This material is synthetically made of graphite polymer, super thin, high thermal conductive, and flexible. It has been widely used in small high integrated electronic applications. It can be cut into customized size and shape, backed with adhesive and membrane. It is an ideal material as heat spreader or as heat sink in limited space.

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　　Flexible graphite, which is really flexible and resilient, is called expanded graphite and vermicular graphite, who is pure graphite material not containing any binder or adhesive substances, and which owns features of corrosion resistance, high temperature resistance, low temperature resistance, radiation resistance and anisotropic resistance, and which also can be applied in lubricating. Flexible graphite particles can be produced into mechanical sealing product, such as, graphite sheet foil, graphite packing ring, stainless steel graphite spiral-wound gasket. By the way, flexible graphite product can produced in different shape to meet different shape demands.

　　As for property, in crystral structure aspect, there is no difference existing between flexible graphite and ordinary graphite. However, because of different produce flow, flexible graphite has its unique edge, such as, advanced thermal stability(high temperature resistant, low temperature, high heat conductivity and low thermal expansion rate), chemical corrosion resistance, radiation resistance, self-lubrication, excellent mechanical ability.

　　As for application, flexible graphite product has been appllied in petroleum, chemical, fertilizer, chemical, pesticide, thermal power, metallurgy, aviation, machinery, nuclear industry and so on, which definately is an outstanding sealing material for pumps, valves, piping and other equipment. In 1980s, an American announced that his experiment shows the perfmance of graphite equipment made by flexible graphite is far better than that made by impregnated graphite.

　　After my introduction, you must have your own comprehension on flexible graphite product. Our company—BeiJing Great Wall Co. ltd—are professional suppiler for graphite product with 13 years’s experience. If you are in the market of graphite product, welcome to our website:www.bjgreatwall.com.

　　The graphite gasket is made of the flexible graphite,also called expandable graphite,it’s one of the new type carbon materials since 1960s,and it first come from the patent of Union Carbine Co USA. After that,with the development of petroleum chemical industry and nuclear power industry,the need for sealing material is also more strict,and the flexible graphite sealing material replace the asbestos material.

　　The flexible graphite has the similar properties with the natural graphite on the structure.and it has many good properties such as high thermal resistance,corrosion resistance,resilience, radiation resistance,high purity etc.

　　The purity of the flexible graphite has a big influence to the sealing property,the Sulpher in the graphite will separate out and make the surface corrosion of the metal,and weak the sealing effect,and to the nuclear industry,the Sulpher content is more important to control,or it will make the pollution to the reaction medium and lead to the system paralysis,so the low S and even no S products are more and more popular,many scholars around the world do this research. Now the main technique to process flexible graphite is : chemical oxidation process, electrochemical method, microwave method, explosive method and gas diffusion method etc.The way to get low S: the key point is to reduce the dosage of sulfuric acid in the intercalation agent and use the organic acid as the intercalator. By this way,it can reduce the content of the sulpher.

　　The way to get no S: it’s use the nitric acid, sulfuric acid, perchlorate or mixed acid as the intercalation. By this way,it can get the no S flexible graphite. And we should also pay attention on the raw graphite powder, it should be no S content raw material, so we could get the 100% no S flexible graphite. Then we could get the low S or no S flexible graphite gasket.

　　Flexible graphite is a soft sheet form of compressed natural graphite made from exfoliated mineral flake(crystalline) graphite. Due to its flexible texture, it is referred to as flexible graphite to distinguish it from other forms of graphite materials: flake graphite, amorphous graphite, artificial graphite (hard graphite), graphite electrodes, graphite/carbon fiber, etc. Sometimes flexible graphite is also referred to by a manufacturer's brand name like grafoil. Flexible graphite sheet is made with pure expanded graphite. standard flexible graphite sheet product has a high purity of 99.0% carbon content. Higher carbon content gives the flexible graphite foil better chemical resistance, better thermal conductivity, and better sealing ability.

　　Standard flexible graphite sheet product suitable for most industry applications. As gasket material, it is usually fabricated into Graphite Laminate, reinforced graphite sheet and widely used in fluid sealing applications: flange gasket, spiral wound gasket, heat exchanger gasket, etc. It can also be used as solid lubricant in metal stamping and forming applications, or as heat liner in industry furnaces and other heating devices.

　　Graphite gasket sheet is made with pure flexible graphite sheet reinforced with glass fiber insert. The both sides are pure graphite sheet, the reinforced material is one layer or two layers of glass fiber. The graphite layer and glass fiber are jointed together with glue bonded. Reinforced graphite gasket is cut or molded from our reinforced graphite sheets. Inner and outer eyelet with SS304 or SS316.

　　Graphite gaskets having excellent corrosion resistance, high temperature resistance, excellent compressibility and recovery, widely used for piping, valves, pumps, pressure vessels, heat exchangers, condensers, generators, compressed machine, exhaust pipes, chillers. Graphite reinforced gasket can also cut into any shape of complex gaskets such as water gauge gasket, full face flange gasket and automotive cylinder head gasket.

　　Reinforced materials: stainless steel tanged, stainless steel foil, tinplate, wire mesh, glass fiber and and Aluminium foil.

　　The graphite is made of natural flake graphite,after oxide intercalation, the thermal expansion, compression molding. Graphite sheet is one kind of flexible graphite,and it’s invented in 1963. after that,it’s widely used in The United Kingdom,German,Franch and Japan.

　　The natural flake graphite is rich in China,and it’s our advantage to do the research and development on the graphite sheet.

The production method of graphite sheet:

　　Graphite is belong to the hexagonal crystal system,and it has a laminated structure,the Interlayer bonding force is very weak,so we could insert some Molecules and atoms into the interlamination by oxidation,and intermetallic compounds is formed, meanwhile expanding the spacing of layers at this step.then heat to about 1000℃ instantly after water scrubbing the compounds,the compounds between the layers separate and by this way,graphite level was pulled,after these,the graphite particle expand dozens of time rapidly along the C direction,it looks like worm under the microscope,so it’s called vermicular graphite,and also called expanded graphite,it has a great compressibility and resilience.under the pressure of mechanical force,the expanded graphite is molded,it could be put into a mould to molded or roller compaction by roll crushing mill.then the flexible graphite sheet is finished,it could form a plate or coil.

　　The flexible graphite sheet has a good temperature tolerance, corrosion resistance, impermeability and compressibility.it widely used as Gasket and filler under the condition of high temperature and corrosive medium.the graphite sheet which has a high aeolotropism,is also used as heat insulation material and conductive material,because of the thermal conductivity and conductivity of X,Y direction much higher than the Z direction.

　　What is Graphite Foil? - Graphite foil is a pliable graphite material with anisotropic properties similar to pyrolitic graphite. It is a good thermal and electrical conductor within the plane of the surface but a much poorer conductor through the thickness of the material. It also has a surface reflectivity several times that of ordinary graphite.

　　Graphite foil products are in stock as sheets, discs, rings & rolls in standard, commercial & high purity grades. All items are to customer requirements. Specialty products include gaskets, tape, die cut rings, carbon fiber yarn & foil yarn with cotton or wire core.

　　Graphite foil is an excellent sealing material for high temperature, high-pressure transfer of liquids, gases, steam, chemicals and corrosives. It is manufactured from high purity, high crystalline natural graphite flakes, which are processed into continuous foil by special acid and thermal treatments to produce expanded graphite crystals. The expanded graphite crystals are then formed into foil through a calendaring process without any resins and binders.

　　Benefits of using Graphite Foil

　　- Excellent thermal stability and reflectivity.

　　- High purity

　　- Low coefficient of friction & self-lubricating.

　　- no associated health hazards.

　　- Low electrical resistivity

　　- Resistant to high temperature of 450oC in air, 700oC in steam & 3000oC in vacuum (or reducing)

　　- Chemically inert with pH range of 0-14 (except strong oxidizers such as nitric or sulphuric acid).

　　- High thermal conductivity

　　- Highly anisotropic - electrical & thermal properties different parallel to & perpendicular to flakes.

　　- Excellent in-process longevity ?save replacement and down time costs.

　　Among others, graphite foil is potentially applicable to high and low temperature gaskets and to lubricate seals. It can be used also in ceramic hot pressing as a protector to punches and dies. Graphite foil also prevents adhesion of ceramic reactions and reduces friction erosion through the pressing and extraction process.

　　Graphite foil gaskets from Graphite Foil Fabricators Corp. are manufactured from sheet or roll products and will compact under only moderate bolt loads to fill irregularities in nearly all fluid sealing applications. Small, surface irregularities are more easily filled under lighter bolt loads thus reducing the need for costly surface refinishings. Rings that are made of compressed graphite foil are known as Die Formed Rings. As a leading Chinese graphite manufacturer and supplier, if you have any inquiry or demand of the graphite foil and sheet , graphite gasket and so on , please feel free to contact us .

　　Graphite reinforced gasket can also cut into the shape of complex gaskets such as water gauge pads, punching flange gasket and automotive diesel engine cylinder gasket. High strength gasket is pure cut gasket improvements inner coated metal foil, namely to maintain the excellent performance of the original gasket, and easy installation, removal, not damaged, but also to prevent the erosion of the gasket medium improve the pressure, and has good corrosion resistance, high / low temperature, good compression resilient and high strength gasket forms: ordinary type, stainless steel edging type. Material and Structure: Flexible graphite sheet material and the metal plate moved sprint composite molding. Temperature: -200 ° C ~ 600 ° C operating pressure: 20MPa main purposes: for a variety of media machines, static seal pumps, pipes, valves, flanges and other equipment.

　　　　Variety: flexible graphite sheet, flexible graphite sheet, flexible graphite strip.

　　Performance: high temperature, low temperature, corrosion resistance to various media, self-lubricating performance, low coefficient of friction, unique flexibility and resilience.

　　1.For rubber, plastic filler to improve wear resistance and compressive properties of plastic or wood made ​​of conductive

　　2.Anti-static, anti-corrosion coating

　　3.Flexible and conformable nature

　　4.Chemical resistant, compatible with most corrosive chemicals

　　5.Heat and flame resistant

　　6.Thermal conductive, electrical conductive

　　7.Low creep relaxation and no aging

　　Usage: graphite easy to damp, with the completion of the Energizer sealed to prevent contamination of the powder station junction or.

　　Natural flake graphite after screening as acid cleaning and in treatment, the treated graphite expansion more than 100 times, flotation was pressed into the graphite paper, that is, flexible graphite

　　flexible graphite is mainly used for sealing industry, flexible graphite sheet is mainly used for electric power, petroleum, chemical industry, flexible graphite paper in these industries is mainly used in machine, pipe, pump, valve seal

　　Graphite foil is a new sealing material foundation, has high temperature resistance, corrosion resistance, radiation resistance, good the electrical conductivity and thermal conductivity, good compression rate, rebound rate and low stress relaxation rate characteristics

　　Graphite foil:

graphite foil and graphite sheet is used for machine sealing,.

　　Graphite tape:

graphite tape is used for thread sealing and sealing flange.

　　Graphite foil with glue:

graphite foil and tape with glue mainly used for thread and flange sealing.