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Expanded Polystyrene Foam
Expanded Polystyrene Foam

polystyrene foam Regular Grade: A Standard Grade B High Expansion Grade D Fast Cycling Grade

1. Description

E.P.S. (Expandable Poly Styrene) is a lightweight, rigid, plastic foam insulation material produced from solid particles of polystyrene. Expansion is achieved by virtue of small amounts of pentane gas dissolved into the polystyrene base material during production. The gas expands under the action of heat, applied as steam, to form perfectly closed cells of EPS. These cells occupy approximately 40 times the volume of the original polystyrene bead. The EPS beads are then molded into appropriate forms suited to their application. Products made from foamed polystyrene are nearly ubiquitous, for example packing materials, insulation, and foam drink cups.

2. Properties

Main Component: 92%~96% polystyrene

Appearance: Colorlessly transparent or opaque tiny beads

Density: about 1.04

Bulk density: about 0.6

3. EPS Classifay

4. Parameter Table

GradeSpecificationBead Size(Diameter)Expandable Rate (one time)Foam DensityApplications
A-Standard Grade mmTimesg/l 
A-1031.00-1.6070-9011-14Block and low density products
A-1040.85-1.2565-8512-15Products more than 12mm thick
A-1050.70-1.0060-7513-17Medium density packaging products
A-1060.50-0.8055-7014-18Products more than 8mm thick
A-1070.40-0.6050-6515-18Products more than 6mm thick
A-1080.30-0.5035-5020-28Moulding and special products i.e. headpieces
GradeSpecificationBead Size(Diameter)Expandable Rate (one time)Foam DensityApplications
B-High Expansion Grade mmTimesg/l 
B-1031.00-1.6080-100180-20010-12.5Electronics packing, block, craftwork,box etc. Especially used for low density block
GradeSpecificationBead Size(Diameter)Expandable Rate (one time)Foam DensityApplications
D-Fast Cycling Grade mmTimesg/l 
D-1031.00-1.6060-7014-17Electronics packaging, block and Chinaware packing and high density products

 5. Applications

6. Packing

Expanded Polystyrene Foam

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