Graphite sheet is a new kind of heat conduction and heat dissipation material. It can transmit heat evenly in two directions. It can shield the heat source and components and improve the performance of consumer electronic products.

　　With the acceleration of the upgrading of electronic products and the growing demand for thermal management of mini, high integration and high performance electronic equipment.

　　This new solution of natural graphite, high radiation efficiency, small space occupation, light weight, uniform heat conduction along two directions, eliminate the "hot spots", performance of shielding heat sources and components and improvement of consumer electronic products.

　　Heat dissipation principle of graphite sheet:

　　A typical thermal management system consists of an external cooling device, a radiator, and a thermal cross section.

　　The important function of the fins is to create the most effective surface area on which the heat is transferred and the external cooling medium is removed. The graphite heat sink is used to distribute heat evenly over the two-dimensional surface, which effectively transfers the heat and ensures that the component operates at the temperature under which it is applied.

　　Features: the surface can be combined with metal, plastic, self-adhesive and other materials to meet more design functions and needs.

　　Excellent thermal conductivity: 150 ~ 1200W/m.k, better than metal heat conduction.

　　Light quality, only 1 to 1.3 of the proportion of soft, easy to operate.

　　Low thermal resistance. Black color. The thickness of the graphite sheet: 0.012-1.0mm glue: 0.03 mm ultrathin 0.012MM

　　Thermal conductivity; planar conduction; 300-1200W/m.k; vertical conduction; 20-30 W/m.k

　　Temperature resistance 400 DEG C

　　Low thermal resistance: thermal resistance is 40% lower than aluminum, 20% lower than copper

　　Light: 25% lighter than aluminum, 75% lighter than copper

　　High thermal conductivity: graphite heat sink can be smoothly attached to any flat and curved surface, and can be cut in any form according to the needs of customers.

　　Graphite flake main use:

　　Applied to notebook computers, high-power LED lighting, flat panel display, digital cameras, mobile phones and personal assistant equipment, etc..

　　The graphite sheet foil , usually, we named it “graphite paper”, it's made of high pure graphite after high temperature expanded.Graphite sheet foil is a kind of totally new thermal & radiating material, heat conducting evenly along two directions, shielding with heat and component while improving the performance of the consumer electronic products.

　　As a new generation heat spreader material, thermal management graphite sheet foil offers a unique combination of excellent heat stability, weight savings, high thermal conductivity, low coefficient of thermal expansion and anti-corrosion to the thermal management industry. It outperforms the traditional heat spreader materials, such as aluminum, copper and so on.It has the characteristics of high temperature resistance,corrosion resistance and good elasticity.For the smart phone, due to it is as the mobile internet terminal, energy dissipation is high and time remaining is long, it asks relatively larger for the test of hardware, smart phone manufacturers improve thermal dissipation through reasonable design of thermal solution to reduce energy dissipation!

　　Graphite sheet foil has provided valuable thermal solutions in a variety of industries and applications, including handheld communication devices, LCD, PDP, LED, CPU, MPU, automobile electronics, power amplifier and other electronics. It will not only miniaturize the electronic components, but also save the weight, lower the cost, improve the safety, optimize the energy efficiency and prolong the operating life.Ultrathin thin graphite paper thermal interface material is a quite right simple and useful thermal dissipation applied material, it has been widely used in smart phone thermal solution.

　　Our company also can produce flexible graphite roll,flexible graphite tape,99% high carbon content graphite paper in rolls,flat flexible graphite tape and metal mesh reinforced graphite sheet,we can provide the customized graphite sheet/foil/paper/tape products according to the customer’s different requirements and applications.

　　The high thermal conductivity graphite sheet has good thermal conductivity of 800-1900W/MK, it is perfect heat conduction material , it’s made from the new film materials after 3500 degrees Celsius high temperature sintering , it’s light and it’s 1/3-3/4 times of aluminum, 1/5-1/4 times of copper , these high thermal conductivity graphite sheet is easy to processing, it can be bent repeatedly and cut to any shapes.

　　The properties of high thermal conductivity graphite sheet : high thermal conductivity, 1900W/m-K (X-Y axis), 15W/m-K (Z axis); high forming temperature , stable and reliable performance, no aging problem; good flexibility performance, easy to cutting, installation and use; it’s flexible and has light weight and high EMI shielding effectiveness; it meet the EU Rohs instructions and the requirements of no the halogen content and other harmful substances.

　　High thermal conductivity graphite sheet is a revolutionary breakthrough in the thermal conductivity material application field, it has a wide range of application areas, it’s the perfect thermal conductivity of electronic mobile intelligent products. This product can be used in PDP, LCD TV, set-top boxes, notebook computers, projectors, mobile phones, handheld devices and automotive electronics and other fields.

　　Our standard high thermal conductivity graphite sheet size: 210mmX250mm, 225mmX225mm, 260mmX260MM, 260mmX800mm, 300mmX300mm, we also can customize the different thickness and size according to the requirements of our customers.

      Both of graphite foil and graphite sheets are flexible graphite products. graphite foil is usually in rolls and graphite sheets has the strengthed style.

　　Graphite foil and graphite sheets are made from compressed exfoliated mineral graphite, pure graphite carbon and without fillers and binders. Most of graphite foil and graphite sheets in the market have a carbon content ranging from 95% -98%. Some brand of flexible graphite foil has a high purity of ≥99% carbon content. The higher carbon content,the better chemical resistance, better thermal conductivity and better sealability.

　　Characteristics of graphite foil and graphite sheets: electrical conductive,thermal conductive;

　　heat and fire resistant; compressible, conformable, low creep relaxation;Chemical resistant, compatible with most chemicals;reinforced structure to handle high pressure applications.

　　Graphite foil and graphite sheets are used commonly in high temperature sealing applications.

　　Applications of graphite foil:

　　- Gaskets material in automotive, petroleum and chemical, paper, and nuclear industries.

　　- Excellent linings and protective layer for vessels containing hot or corrosive fluids.

　　- Excellent for sealing high temperature valves, shafts and flanges.

　　- Fuel cell industry for bipolar plates.

　　Flexible graphite foil is made with pure expanded mineral graphite. 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 sheets typical applications :heat and chemical resistant gasket, seal, liner; thermal conductive seal; heat exchanger gasket.

　　Graphite sheet is widely used in the industry of electric power, oil, chemical, instrument, machinery and diamond etc.it’s an ideal new type sealing material and could replace rubber, fluoroplastics and asbestos in using for pipe,pump, valve.

　　With the acceleration of electronic product upgrading,and smaller and smaller and the demand for radiator pipe of high performance electronic devices, the new technology of heat dissipation of electronic products, that is, graphite material heat dissipation has been widely used.this kind of new graphite heat dissipation material take advantage of the heat dissipation efficiency, small footprint, light in weight, heat conduction along the two directions etc.

　　We know that the flexible graphite,like graphite sheet, is made of the natural flake graphite,acturally,the natural graphite need to be further processing to expansible graphite and then to used for flexible graphite.

　　Under appropriate conditions, acid, alkali metal, salt, can be inserted into the graphite layers, and combine with carbon atoms,to form new chemical phase——Graphite layers of compound,this compound could break down instantly when the temperature become fit. expand graphite along the C axis to form a new substances,and that is the expansible graphite.

　　After intercalation, deintercalate, extrusion, pressing,the crystal structure of expansible graphite is still not changed so the chemical stability and corrosion resistance of expanded graphite is good,it has a good stability almost to all of the acid, alkali, salt, organic solvents, oils, etc.it can be applied to pH 0~14.

　　The flexible graphite sheet is only one production of the expansible graphite,it could also used to make expanded graphite yarn, braided graphite tape, braided expanded graphite cloth, braided graphite tube/sleeving, die-formed graphite ring etc.

　　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 .

　　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.