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简体中文Expandable Graphite Flame Retardants
-- Steady & Reliable Manufacturer --
Introduction
Expandable graphite is a natural flake graphite that has been chemically intercalated so that, on exposure to heat, it expands dramatically along its layers to form an insulating, low-density char barrier. This behavior makes expandable graphite flame retardants particularly effective in intumescent systems, where the expanded char slows heat transfer and shields the underlying material from flame.
As a manufacturer, we supply expandable graphite in a range of mesh sizes and expansion volumes, including low-sulfur and low-odor grades suited to indoor applications. It is commonly used alongside phosphorus and nitrogen based synergists to build intumescent fire protection systems for coatings, foams, and composites.
Because performance depends heavily on particle size, purity, and expansion behavior, each production batch is tested for expansion volume before release, so formulators can rely on consistent intumescent response batch after batch.
Specification
| Parameter | Typical Value |
|---|---|
| Appearance | Grey to black flake or granule |
| Expansion Volume | 250 to 350 mL/g (grade dependent, higher volumes available) |
| Expansion Onset Temperature | Approximately 200°C to 220°C |
| Mesh Size Options | 20, 50, 80, and 100 mesh, selectable by application |
| Carbon Content | 99% min for high-purity grades |
| Sulfur Content | Standard and low-sulfur grades available |
| Moisture Content | 0.5% max |
| Packaging | 25kg kraft bags or 500kg / 1000kg jumbo bags for bulk orders |
Expansion volume and mesh size are tested and reported for each batch, since these two parameters most directly affect intumescent performance in the finished product.
Application
Expandable graphite is used wherever an intumescent, char-forming barrier is needed to delay heat transfer and flame spread.
- Intumescent fireproof coatings: Water-based and solvent-based coatings for structural steel and decorative fire protection.
- Polyurethane and PIR foam insulation: Foam boards requiring improved fire performance without heavy reliance on halogenated additives.
- Fireproof composites and panels: Epoxy and phenolic composite systems used in construction and transportation.
- Cable and rubber compounds: Fire-resistant compounds for cable coatings and industrial rubber articles.
- Fire-rated sealants and putties: Sealing compounds used around penetrations and expansion joints in fire-rated assemblies.
Advantages
- Strong intumescent response: High expansion volume grades form a thick, insulating char layer on heat exposure.
- Effective at practical loading levels: Contributes meaningful fire performance without requiring excessive filler content.
- Low smoke contribution: Generates comparatively little smoke relative to halogenated flame retardant systems.
- Halogen-free compatibility: Works well alongside phosphorus and nitrogen synergists in halogen-free formulations.
- Consistent expansion behavior: Batch testing for expansion volume supports reliable, repeatable intumescent performance.
Manufacturing Facility in XUSEN
We have our own production workshops and warehouses, equipped with complete production and quality inspection equipment.
As China Expandable Graphite Flame Retardants Suppliers and Expandable Graphite Flame Retardants Factory., With over 20 years in developing halogen-free flame-retardant products positions us as industry leaders in providing domestic flame-retardant solutions.
All our products comply with the stringent requirements of the WEEE, ROHS, and EUP directives.
Rubber and Plastic Industry
Suitable for materials such as PA, PP, polyester, elastomers, PE, EVA, PC, ABS, etc., widely used in household appliances, automobiles, electricians, cables, and other products.
Composite Materials Field
Suitable for composite flame retardant products based on epoxy resin, polyurethane, etc., we can jointly develop flame retardant products with users to meet the requirements of flame retardancy and physical properties.
Adhesive Field
Suitable for oil-based and water-based adhesives, and can be modified according to customer needs to adapt to user usage conditions and requirements, while maintaining good weather resistance and dispersibility.
Fabric coating field
It is applicable to the flame retardant fabric coating based on acrylic lotion. The formula and process can be adjusted according to the user's requirements for flame retardancy, sizing amount, hand feel, etc. to meet the requirements for flame retardancy and physical properties.
Fireproof coatings field
In fireproof coatings, flame retardants are mainly used in APP. We have undergone specific processing techniques for coating APP, which can meet the quality requirements of well-known international manufacturers such as PPG and ICI.
