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
| Grade | Specification | Bead Size(Diameter) | Expandable Rate (one time) | Foam Density | Applications | |
| A-Standard Grade | mm | Times | g/l | |||
| A-103 | 1.00-1.60 | 70-90 | 11-14 | Block and low density products | ||
| A-104 | 0.85-1.25 | 65-85 | 12-15 | Products more than 12mm thick | ||
| A-105 | 0.70-1.00 | 60-75 | 13-17 | Medium density packaging products | ||
| A-106 | 0.50-0.80 | 55-70 | 14-18 | Products more than 8mm thick | ||
| A-107 | 0.40-0.60 | 50-65 | 15-18 | Products more than 6mm thick | ||
| A-108 | 0.30-0.50 | 35-50 | 20-28 | Moulding and special products i.e. headpieces | ||
| Grade | Specification | Bead Size(Diameter) | Expandable Rate (one time) | Foam Density | Applications | |
| B-High Expansion Grade | mm | Times | g/l | |||
| B-103 | 1.00-1.60 | 80-100 | 180-200 | 10-12.5 | Electronics packing, block, craftwork,box etc. Especially used for low density block | |
| B-104 | 0.85-1.25 | 70-90 | 160-180 | 11-14 | ||
| B-105 | 0.70-1.00 | 60-80 | 130-150 | 12.5-13 | ||
| B-106 | 0.50-0.80 | 50-60 | 100-130 | 13-18 | ||
| B-107 | 0.40-0.60 | 30-40 | 60-90 | 25-33 | ||
| B-108 | 0.30-0.50 | 20-35 | 40-70 | 18-50 | ||
| Grade | Specification | Bead Size(Diameter) | Expandable Rate (one time) | Foam Density | Applications | |
| D-Fast Cycling Grade | mm | Times | g/l | |||
| D-103 | 1.00-1.60 | 60-70 | 14-17 | Electronics packaging, block and Chinaware packing and high density products | ||
| D-104 | 0.85-1.25 | 50-65 | 15-20 | |||
| D-105 | 0.70-1.00 | 40-60 | 17-25 | |||
| D-106 | 0.50-0.80 | 35-55 | 18-29 | |||
5. Applications
6. Packing
Expanded Polystyrene Foam
