80 Mesh High Pure Expandable Graphite Powder For PU

Product Specification

80 Mesh High Pure Expandable Graphite Powder For PU

Products Description :

Expandable graphite, also known as flexible graphite, is made of high-quality natural flake graphite, which is processed by high temperature and scaly into worm-like shape. The volume can be expanded by 100-400 times. This expanded graphite still retains the properties of natural graphite and has good properties. Forming plasticity, flexibility, ductility and sealing, it is an ideal new sealing material and high quality raw materials for various graphite sheets. It is a dynamic seal in the petroleum, chemical, electric, aerospace, automotive, marine and instrumentation industries. It has a wide range of applications and can also be used as a new type of mold flux and heat generation agent for the metallurgical industry.

Products Details and Parameters :
 

High temperature resistant, good low temperature resistance, corrosion resistance, and thermally conductive, etc., in addition, graphite, expanded graphite is also called a worm worm between gears mesh, expanded graphite formation plate strip, has a good compressibility, resilience and low stress relaxation rate.
It can be used for various dynamic and static seals in petrochemical, electric power, metallurgy and machinery industries, and shows the advantages of low cost, low energy consumption, long service life and good effect.

Application

As the expandable graphite has the ability of anti destruction and high expansion rate in high temperature, it can be used as an effective intumescent flame retardant material in the composition of fire-proof package, plastic fire-proof plugging material and fire-proof ring for building fire-proof plugging (such as sealing building pipes, cables, wires, gas pipes, gas pipes, etc.) Air duct through the hole, etc. The fine particles of expandable graphite can be added into the common coatings to produce a better flame retardant and antistatic coating, and improve its high temperature resistance and fire resistance. A large number of light non combustible carbon layers formed in the fire can effectively block the heat radiation to the substrate and effectively protect the substrate. In addition, because graphite is a good electric conductor, the coating can prevent the accumulation of static charges, and can be used in oil storage tanks to achieve the dual effect of fire and static electricity. Fireproof board, fireproof paper, anti-corrosion and high temperature resistant board: expandable graphite layer is lined on the metal base, carbonization bonding layer is between the expandable graphite layer and the metal base, and carbonization protection layer is covered outside the expandable graphite layer. It has the properties of corrosion resistance, high temperature resistance and high pressure resistance. At the same time, it is resistant to heat shock and can be used normally at low temperature. It is not afraid of fast cooling and fast heating, and has excellent heat conductivity. The service temperature is - 100 ~ 2000 ºC. It has the advantages of wide application, easy manufacture and low cost. In addition, the graphite paper formed by high temperature expansion of expandable graphite is also used in places of fire prevention and insulation.

Products Features :

Due to its special structure, graphite has the following special properties:

1) High temperature resistance: The melting point of graphite is 3850 ± 50 ºC, and the boiling point is 4250 ºC. Even if it is burned by ultra-high temperature arc, the weight loss is small and the coefficient of thermal expansion is also small. The strength of graphite strengthens with increasing temperature. At 2000 ºC, the strength of graphite doubles.

2) Electrical and thermal conductivity: The electrical conductivity of graphite is one hundred times higher than that of ordinary non-metallic ores. Thermal conductivity exceeds metal materials such as steel, iron, and lead. The thermal conductivity decreases with increasing temperature. Even at extremely high temperatures, graphite becomes an insulator. Graphite can conduct electricity because each carbon atom in graphite only forms 3 covalent bonds with other carbon atoms, and each carbon atom still retains 1 free electron to transfer charge.

3) Lubricity: The lubricating performance of graphite depends on the size of graphite flakes. The larger the flakes, the smaller the friction coefficient and the better the lubricating performance.

4) Chemical stability: Graphite has good chemical stability at room temperature, and is resistant to acid, alkali and organic solvents.

5) Plasticity: Graphite has good toughness and can be rolled into a very thin sheet.

6) Thermal shock resistance: When used at room temperature, graphite can withstand the drastic change of temperature without damage. When the temperature changes suddenly, the volume of graphite does not change much, and no cracks will occur.

Loading &Delivery:

25kg/500kg/1000kg pp bags or as your request