Expandable Graphite
Expandable Graphite
Expandable graphite is natural flake graphite treated so that it expands many times in volume when heated. This makes it useful in flame retardant, intumescent fire-stop and flexible graphite products.
Key facts
| Synonyms | Expanded graphite raw material, intumescent graphite, intercalated graphite |
|---|---|
| Minimum order | 0 |
| Dispatch from | Kolkata, West Bengal |
Last updated:
Why buy from Akshar Shop: COA / SDS on request · GST invoice with every order · dispatch from Kolkata, delivery across India.
About Expandable Graphite
Expandable graphite is natural flake graphite treated so that it expands many times in volume when heated. This makes it useful in flame retardant, intumescent fire-stop and flexible graphite products.
Uses and applications of expandable graphite
- Flame retardant additive: in polyurethane foams, plastics, rubber and textiles, where the expanded layer forms an insulating char.
- Fire-stop products: intumescent seals, strips, mastics and coatings for doors, cable and pipe penetrations.
- Flexible graphite: raw material for graphite foil, sheets and gaskets after expansion and rolling.
- Foundry and steel: used in some insulating and hot-topping applications.
- Research and development: material for labs working on graphene-type and conductive products.
Grades, forms and packing
Expandable graphite is offered in different flake sizes and expansion grades. Flake size, expansion volume, onset temperature and carbon content depend on the grade and are shared with the quotation, with a COA on request. Packing is in bags suited to the quantity, from small packs for formulation trials to larger lots for production. For non-expandable grades, see our graphite powder and graphite granules.
Why buy expandable graphite from Akshar Shop
- Technical details of each grade shared before you place an order.
- GST invoice with every order, and COA and SDS shared on request.
- Dispatch from Kolkata with delivery across India by road transport or courier, depending on quantity.
- Quick quotation on WhatsApp +91 92303 82749 or [email protected], or use the enquiry form on this page.
Storage and handling
Store in a cool, dry place in closed bags, away from heat sources, sparks and open flame, because the material expands sharply on heating. Avoid dust formation, wear gloves, goggles and a dust mask, and follow the SDS for the specific grade.
Need the grade, pack size or price? Send an enquiry or WhatsApp +91 92303 82749. COA and SDS are available on request.
Specification
- Mineral / material : Expandable (intercalated) flake graphite
- Appearance : Grey to black shiny flakes
- Forms available : Flakes in different sizes and expansion grades
- Key property : Expands in volume when heated
- Typical applications : Flame retardants, intumescent fire-stop products, flexible graphite foil
Frequently asked questions about Expandable Graphite
What is expandable graphite?
It is natural flake graphite treated with chemicals between its layers. When heated, these layers push apart and the flakes expand into a worm-like, low-density form.
How does it work as a flame retardant?
In a fire, the graphite expands and forms a thick, insulating layer on the surface, which slows heat transfer and the spread of flame.
How do I choose a grade?
The choice depends on flake size, expansion volume and the temperature at which expansion starts. Tell us your product and we will share suitable grade details.
Is it the same as graphite powder?
No. Ordinary graphite powder does not expand on heating. Expandable graphite is a specially treated grade.
