Hangzhou Epsole Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of eps polystyrene bead in China. We warmly welcome you to buy high quality eps polystyrene bead for sale here from our factory. Good service and reasonable price are available.
EPS Polystyrene Bead | 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, flame retardant, high-density, and graphite-enhanced grades
High-Quality EPS Polystyrene Bead
Eps Polystyrene Bead is 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 polystyrene beads are widely used in packaging, building insulation, cold chain logistics, and consumer goods industries.
1. Stable Raw Material Quality
Our EPS polystyrene 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. Based on application requirements, we offer custom products including standard, flame-retardant, high-density, and graphite-enhanced grades.
2. Multiple Specifications for Different Processes
Based on customer molding processes and end-product requirements, we offer EPS polystyrene 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, building insulation boards, and cold chain packaging.
3. Professional Storage and Safe Transportation
EPS polystyrene bead 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.
Products Description
- 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, lightweight concrete forms
- Cold Chain Logistics: Seafood transport boxes, medical cold chain boxes, fruit and vegetable preservation containers
- Consumer Goods: Coolers, flotation devices, helmet liners, art sculptures
- Industrial Applications: Pipeline insulation, equipment filling, buoyancy materials
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 polystyrene bead 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 polystyrene 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.
Key Properties of EPS Beads
Lightweight – Low density (10–30 kg/m³ after expansion).
Thermal Insulation – Excellent heat retention (R-value ~3.5–4.0 per inch).
Shock Absorption – Protects fragile items in packaging.
Water & Moisture Resistant – Does not absorb water easily.
Customizable Expansion – Can be adjusted for different densities.
Manufacturing Process of EPS Beads
Polymerization – Raw styrene is polymerized into solid polystyrene resin.
Extrusion & Cutting – The resin is extruded and cut into small beads (0.2–3 mm diameter).
Pentane Infusion – The beads are impregnated with a blowing agent (usually pentane gas).
Pre-Expansion – When heated (90–110°C), the pentane expands the beads up to 50x their original size.
Molding – Expanded beads are fused into blocks or shapes using steam.
Types of EPS Beads
| Type | Characteristics | Common Uses |
|---|---|---|
| Standard EPS Beads | Regular expansion, medium density | Packaging, disposable cups |
| Fire-Retardant EPS | Contains flame retardants (e.g., HBCD) | Construction, insulation panels |
| High-Density EPS | More compact, stronger | Structural insulation, marine floats |
| Graphite-Infused EPS (Grey EPS) | Improved thermal insulation (R-value) | Energy-efficient buildings |
Applications of EPS Beads
Packaging – Custom foam inserts for electronics, appliances.
Construction – Insulated concrete forms (ICF), wall panels.
Cold Chain Packaging – Fish boxes, medical coolers.
Buoyancy & Floating Devices – Life jackets, dock floats.
Arts & Crafts – Lightweight sculptures, stage props.
EPS Bead Sizes & Grades
Small Beads (0.2–0.5 mm) – Fine details (e.g., thin packaging).
Medium Beads (0.5–1.5 mm) – General-purpose EPS foam.
Large Beads (1.5–3 mm) – High-strength blocks (e.g., construction).
Density Range: 10–40 kg/m³ (varies based on expansion).
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