E (E-301 / 302 / 303 / 401 / 501)

China EPS Resin Beads — Standard Grade Raw Material

Name: China EPS Resin Beads — Standard Grade Raw Material
Brand: ChinaEps
Availability: PreOrder

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China EPS Resin Beads — Standard Grade Raw Material — eps raw materials by ChinaEps, ISO 9001 & REACH & RoHS certified.

China EPS resin beads, standard grade raw material — 5 grades E-301 to E-501, bead size 0.4–1.6 mm, density 12–30 g/L. MOQ 5 tons FOB China, COA per batch.

Key Specifications

Material

Expandable polystyrene (EPS) resin beads, unexpanded

Grade

Standard / General Purpose

Recyclability

100% Recyclable

Applications

Insulation, Packaging, Construction

CE and ISO 9001 Certified Consistent Quality, Batch-Tested 24h Technical Response

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Technical Specifications

5 models

Parameter	E-301	E-302	E-303	E-401	E-501
Bead Size	1.00-1.60 mm	0.85-1.25 mm	0.70-0.90 mm	0.50-0.80 mm	0.40-0.60 mm
Expansion Times	70-85	60-70	55-65	40-55	30-40
Density	12-14 g/L	14-16 g/L	15-18 g/L	18-25 g/L	25-30 g/L
Blowing Agent (Pentane)	6.5-7.2%	6.5-7.2%	6.5-7.2%	6.5-7.2%	6.5-7.2%
Residual Styrene Monomer (SM)	≤4000 ppm	≤4000 ppm	≤4000 ppm	≤4000 ppm	≤4000 ppm
Moisture	≤1.0%	≤1.0%	≤1.0%	≤1.0%	≤1.0%
Coating Agent	≤3200 ppm	≤3200 ppm	≤3200 ppm	≤3200 ppm	≤3200 ppm
Oxygen Index	N.A.	N.A.	N.A.	N.A.	N.A.

* Specifications are subject to change without notice. Contact us for the latest technical data.

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What This Grade Solves

Production problems eliminated by this raw material grade — with engineered, measurable solutions.

The Problem 1

Cheap unspecified EPS beads produce inconsistent expansion + density — final products fail QC consistency tests

How This Grade Solves It

Standard-grade EPS beads (BASF/INEOS-equivalent spec) hold ±0.2 kg/m³ batch-to-batch density consistency for standard insulation and packaging production.

The Problem 2

Mixing bead grades from different suppliers causes incompatibility issues in PE pre-expander recipes

How This Grade Solves It

Single-source standard-grade EPS beads simplify recipe management — one recipe per density class works across all production.

Engineered Performance Advantages

Every advantage backed by measurable specs — no marketing claims without data.

Expansion Ratio

30-85× by grade

vs unspecified beads vary widely

Predictable expansion enables tight density control.

Bead Size Distribution

0.4-1.6 mm, five sieve cuts

vs unspecified mixed

Consistent bead size feeds molding cycles uniformly.

VOC Content

<400 ppm

vs industrial standard

Compliant with EU and North America building material standards.

Real Production Applications

See where this grade fits in real factories.

General-purpose EPS insulation boards for construction

General-purpose EPS cushioning and packaging insert

EPS shape-molded fish and cold-chain boxes

Cut EPS panels stacked for outbound logistics

Build a Complete EPS / EPP Line

This raw material grade fits into the full ChinaEps supply chain — machinery, complementary grades, and turnkey lines from one supplier.

Downstream — Finishing & Packing

PE Pre-Expander

Standard beads are the feed material for any PE pre-expander.

Auxiliary Systems

Fast-Cycling Variant

For 30-40% faster molding cycles, upgrade to mat-fast-cycling beads.

ROI Snapshot

Quick reference numbers — for a precise quote with your factory data, use the ROI Calculator.

Equipment Investment

~$1,400-1,600/ton FOB illustrative (quote-specific)

Payback Period

Direct material cost — typically 35-45% of finished EPS product cost

Throughput

Available in 25kg bags or 1,000kg jumbo bags

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Product FAQ

The questions buyers ask most often before placing an order.

Is EPS resin the same as EPS beads?

Yes. In the trade, "EPS resin" and "EPS beads" both mean unexpanded expandable polystyrene: polystyrene resin beads impregnated with 6.5-7.2% pentane. The E-301 to E-501 grades on this page are unexpanded resin beads of 0.4-1.6 mm, shipped from China in 25 kg bags or 1,000 kg jumbo bags.

Brand origin?

Sourced from BASF, INEOS Styrolution, Kumho, or Asian partner producers — all virgin-grade with COA documentation.

Density grades available?

12-14 g/L (E-301), 14-16 g/L (E-302), 15-18 g/L (E-303), 18-25 g/L (E-401), 25-30 g/L (E-501) — see the specification table above.

Shelf life?

12 months from production date when stored at 15-25°C in sealed bags. Aging accelerates above 30°C.