Description：

Expandable graphite is a flexible graphite product obtained through special modification treatment of high-quality natural flake graphite produced by our company. It is an ideal new type of sealing material and is widely used in dynamic and static sealing in industries such as petroleum, chemical engineering, power, aviation, automobiles, ships, and instrumentation.

Expandable graphite, after high-temperature instantaneous treatment, transforms from flaky to worm-like, with a volume expansion of 100 to 400 times. This expandable graphite still retains the properties of natural graphite and has excellent formability, flexibility, ductility and sealing performance. It is an excellent raw material for various graphite plates and seals, and can also be used as a new type of protective slag and heating agent in the metallurgical industry.

 

Varieties :9950250, 9980250, 9950200, 9980200, 9550250, 9580200 and other specifications

Particle size :32 mesh, 50 mesh, 80 mesh, 100 mesh -100 mesh -200 mesh -325 mesh. Expansion ratio :100-400ml/g

Performance: It has excellent expandability. The finished products are heat-resistant, radiation-proof, heat-insulating, lubricating, malleable and chemically stable.

Application: Widely used in industrial sectors such as steel, metallurgy, petroleum, chemical engineering, machinery, aerospace, and atomic energy.

 

Classification：

According to the expansion ratio: high-expansion expanded graphite (250-400 times) and medium and low-expansion expanded graphite (100-240 times)

According to the processing methods: potassium permanganate method, sodium dichromate method, hydrogen peroxide method, nitric acid method.

According to sulfur content: sulfuric acid method and nitric acid low-sulfur or sulfur-free method.

According to the initial temperature, it is divided into three bands: the first is the low initial temperature: 80-150 degrees; the second is the medium initial temperature: 150-240 degrees; and the third is the high initial temperature: 300 degrees.

 

Advantage：

Different multiple requirements and purity requirements can all be produced and met.

Batch production of special products such as low-temperature starting

Ultra-low trace elements and good stability

 

Application field：

Sealing field: Various types of graphite paper products and composite plates.

Friction materials: Brake pad materials with special requirements for automobiles, special lubricating materials.

Fire protection field: Fireproof sealing strips for building decoration.

 

Technical indicators：

 

Specification type	Expansion ratio (%)	Purity (%)	Mesh count	Ash content range (%)	Volatile matter range (%)
Sodium dichromate method	100-300	90-99.5	80-50
Potassium permanganate method	100-250	90-99.5	80-50
Hydrogen peroxide method	100-200	90-99.8	80-50

 

Special requirement series products can also be produced separately according to customer demands.