Hangzhou Epsole Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of eps beads in China. We warmly welcome you to buy high quality eps beads for sale here from our factory. Good service and reasonable price are available.
EPS Beads | Expandable Polystyrene Raw Material | Factory Direct
- Uniform Particle Size - Multiple specifications from 0.2mm to 3.0mm with stable, controllable expansion ratio
- Superior Expansion Performance - Expansion ratio of 20 to 50 times with concentrated bead density distribution
- Multiple Types Available - Standard, high-expansion, flame retardant, and graphite-enhanced grades
High-Quality Expandable Polystyrene (EPS) Beads
Eps Beads are the core raw material for EPS foam product manufacturing. These polystyrene particles contain a blowing agent (pentane) that vaporizes when heated, causing the beads to expand into lightweight foam material. Our EPS beads are widely used in packaging, building insulation, casting, and consumer goods industries.
1. Stable Raw Material Quality
Our EPS beads undergo strict screening to ensure concentrated particle size distribution and stable, controllable expansion ratio. After pre-expansion, the bead density is uniform, ensuring firm fusion between particles during molding and resulting in smooth surfaces and consistent strength in finished products. For special applications, we offer custom products including flame-retardant, high-expansion, and graphite-enhanced grades.
2. Multiple Specifications for Different Processes
Based on customer molding processes and end-product requirements, we offer EPS beads in particle size ranges from 0.2mm to 3.0mm with expansion ratios from 20 to 50 times. These are suitable for multiple production scenarios including sheet molding, packaging molding, lost foam casting, and building insulation boards.
3. Professional Storage and Safe Transportation
EPS beads storage requires protection from high temperatures and open flames. Our warehouses are equipped with temperature control and ventilation systems, strictly adhering to safety storage standards to ensure material stability during storage. Anti-static packaging is used during transportation to avoid compression damage and static buildup risks.
4. Molding Technical Support
Leveraging over 20 years of experience in EPS equipment manufacturing, we provide not only raw materials but also comprehensive technical support covering pre-expansion parameter settings, maturation time control, and molding temperature optimization. This helps customers achieve high-quality finished products with minimal material waste.
Main Applications
- Packaging Industry: Custom cushioning packaging for electronics, precision instruments, medical devices, and other products
- Building Insulation: Exterior wall insulation boards, roof insulation layers, underfloor heating insulation, EPS architectural trim
- Casting Industry: Pattern materials for lost foam casting
- Consumer Goods: Coolers, flotation devices, children's products
- Other Applications: Lightweight fill materials, road embankment fill, horticultural growing media
Why Do Global Customers Choose Epsole EPS Beads?
1. Integrated Supply Chain Advantage
As an EPS equipment manufacturer, we simultaneously supply raw materials, molds, and accessories. This integrated model gives us deeper insight into the compatibility between raw material properties and equipment processes, enabling us to provide customers with comprehensive optimization solutions from material selection to molding production.
2. Stable Supply Capacity
We maintain long-term partnerships with major petrochemical enterprises, ensuring stable EPS beads supply and competitive pricing. Regardless of order size, we guarantee on-time delivery to meet the continuous demands of batch production.
3. Strict Quality Control
Each batch of EPS beads undergoes particle size distribution testing, expansion ratio testing, residual pentane content analysis, and molding validation to ensure performance standards are met before shipment. Batch test reports and quality certification documents are available upon customer request.
4. Full Technical Support and After-Sales Service
Our professional technical service team provides on-site commissioning guidance, process optimization recommendations, and production troubleshooting support. Our goal is to help customers produce the highest quality finished products at the most economical raw material cost.
Composition & Basic Properties
Material: Pre-expandable polystyrene (98% polystyrene + 2% pentane blowing agent)
Appearance: Small, hard spheres (0.2-3mm diameter)
Color: Typically white (grey for graphite-enhanced versions)
Key Characteristics:
Expand 20-50 times original size when heated
Non-toxic and odorless
Excellent thermal insulation properties
Low water absorption
Manufacturing Process
Polymerization: Styrene monomer is polymerized into polystyrene
Impregnation: Pentane gas is infused into the beads under pressure
Sizing: Beads are sorted into uniform particle sizes
Coating: Optional flame retardant or other additives applied
Types of EPS Beads
| Type | Expansion Ratio | Density Range | Special Features |
|---|---|---|---|
| Standard | 20-30x | 15-30 kg/m³ | General purpose |
| High Expansion | 40-50x | 10-15 kg/m³ | Ultra-lightweight |
| Flame Retardant | 20-30x | 15-30 kg/m³ | Contains fire inhibitors |
| Graphite Modified | 20-30x | 15-30 kg/m³ | Improved insulation |
Expansion Process
When heated to 90-110°C with steam:
Pentane inside beads vaporizes
Polystyrene softens
Beads expand dramatically
Expanded beads stabilize for 6-24 hours before molding
Applications
Packaging: Custom protective inserts
Construction: Insulation boards, ICF blocks
Consumer Goods: Coolers, flotation devices
Specialty: Lost foam casting, geofoam
Storage & Handling
Store in cool, dry place away from heat sources
Shelf life: 6-12 months in original packaging
Keep away from open flames (pentane is flammable)
Technical Specifications
Bulk density: 600-650 kg/m³ (unexpanded)
Bead size distribution: 0.2-3.0 mm
Residual pentane content: 4-7%
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