Polystyrene is one of the best materials for injection molding. Cycle times with polystyrene are usually short due to ease of melting, fluidity and mold set up or cooling times. The surface finish of the final product and the low mold shrinkage of polystyrene are excellent. Moreover, due to good inherent thermal stability, polystyrene can be easily used in the regrind feed with minimal effect on final properties. Polystyrene can also be easily compounded or colored in the melt phase and formulated for specific performance such as gloss and anti-static properties.
For more technical information on the extrusion process, please click here.
| Polystyrene Products for Molding |
| Product |
Resin Type |
MFI , 200/5.0, g/10mn |
Vicat Softening Point, °F |
Notched Izod @ 73°F
in ft-lb/in |
Flexural Strength, psi |
|
500
|
Crystal |
14.0
|
200
|
N/A
|
11,000
|
|
525
|
Crystal |
9.0
|
213
|
N/A
|
13,500
|
|
529
|
Crystal |
3.5
|
208
|
N/A
|
14,000
|
|
535
|
High Heat Crystal |
4.0
|
222
|
N/A
|
14,000
|
|
625
|
Medium Impact |
13.0
|
198
|
1.40
|
6,500
|
|
740
|
High Impact |
4.0
|
210
|
1.90
|
8,300
|
|
825
|
High Impact |
8.0
|
205
|
2.00
|
6,700
|
|
830
|
High Impact |
13.0
|
197
|
2.10
|
5,700
|
|
945
|
Super High Impact |
9.0
|
201
|
2.60
|
5,600
|
|
