What is thermally expandable graphite (TEG)?

TEG is AIR WATER’s original thermally expandable graphite made through an intercalation compound treatment of a natural, scale-like graphite using of our patented technology to add thermal expansion properties.

Rigorous quality control and the long-term stability of different properties are maintained by this product, based on the operational expertise we have accumulated over our 30-year history as the one and only manufacturer in Japan.

What is thermally expandable graphite (TEG)?

Principle of TEG

Generally, expansion occurs when TEG is heated to near 200 °C. The higher the temperature is,
the more evident the expansion becomes..

Heating the material decomposes and gasifies sulfuric acid and the other intercalation materials inserted between the layers.

Heating the material decomposes and gasifies sulfuric acid and the other intercalation materials inserted between the layers.

The pressure of the gasification expands each layer in the vertical direction of the hexagonal tabular crystals.

Principle of TEG Volume before and after expansion — ▶︎Volume before and after expansion

Principle of TEG Microscopic image of an expanded product — ▶︎Microscopic image of an expanded product

Features of TEG

TEG Expansion illust — 01 Expansion of a standard item starts at a temperate between 200 and 220 ℃. When heated, it expands about 200-fold.
For some grades of TEG, the temperature where it starts to expand is 260 ℃. These grades of TEG are suitable for applications with high molding temperature.

TEG compression-molded — 02 Expanded TEG can easily be compression-molded without the use of a binder.

TEG flame retardant — 03 When added to combustible substances such as rubber and resin, TEG serves as a flame retardant.
TEG can also be used in combination with phosphate ester or other non-halogen flame retardants.

TEG non-halogen — 04 Being non-halogen, TEG does not emit chlorine gas or any other hazardous gases when combusted.

TEG ecologically — 05 Manufactured in an ecologically sound way, TEG is also environmentally friendly and aligned with the SDGs.

Features of TEG

Flame resistance

TEG is excellently flame retardant as it
thermally expands to form a carbon wall
that can block a flame.

Sealability

Because of its excellent sealability,
TEG can prevent liquids and gases from
leaking out and prevent foreign substances from entering inside.

Processability

TEG is flexible, lightweight and very processable.
For example, it can easily be cut.

Applications for TEG

Fields of use

Seal components

Use

Gaskets (automobile engines)

Packing (pipes in chemical plants)

Construction components (fire prevention sections such as plumbing pipes and window sashes)

Construction components — Construction
components

Fields of use

Flame retardants

Use

①Different types of rubber and resin
(Examples)
Butyl rubber, chloroprene rubber, urethane

②Peripheral applications
(Examples)
Construction materials (fire prevention sections such as plumbing pipes, window sashes and doors) Different components of railroad cars (ceilings, floors, doors) Aircraft seats Electric cables

Fields of use

Thermally
conductive materials

Use

Heat dissipation sheet (heat-generating parts of a smartphone, electronic device or other device)

Lineup of TEG products

We provide many different grades of TEG to suit your purposes.

Product grades
	Standard products			Special products
	Ultra-low ash content	Moderate ash content	High ash content	Neutralized products	High-temperature expandable products
	SS-3LA	SS-3	CA-60	SS-3N	MZ-260
Recommended use examples	Sealants	Sealants	Flame retardants	Flame retardants	Flame retardants

Frequently asked questions

What characteristics set you apart from other companies?

As the one and only manufacturer in Japan, our over 30-year history of sales, the consistency of the quality we achieve through rigorous manufacturing control and quality control, our extensive product lineup, and other characteristics.

Do you have catalogs?

Yes. We have leaflets, product grade tables and many other materials.

Can I have a sample of your product?

Yes. If you contact us regarding a specific product and/or for information about a product’s treatment and disposal, we will send you a sample for free.

How do I ask for an estimate?

For inquiries, please contact our sales representative.

Inquiries

Click to call us

8144-540-0105

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