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Plastic Material PS
Plastic Material PS

 
PS (Polystyrene)


Applications:


Packaging, housewares (tableware, trays, etc), electrical (transparent housings, light diffusers, insulating film).

Injection Molding Processing Conditions:

DryingGNot usually required unless stored improperly. If drying is needed, the recommended conditions are 2-3 hours at 80 J.

Melt TemperatureG180-280 J (upper limit is 250 J for flame retardant grades).

Mould TemperatureG-7 - 70 J (lower temperatures are typically used for thin wall components); Suggested: 40-50 J.

Injection PressureG20-60 MPa.

Injection SpeedGFast speeds are recommended.


Runners and Gates
G All types of conventional gates may be used.

Chemical and Physical Properties

General-purpose PS is produced by the polymerisation of styrene. Most commercial grades are clear, amorphous polymers. PS offers excellent dimensional and thermal stability, optical clarity, and very little tendency to absorb moisture. It has good dielectric properties. It is resistant to water and dilute inorganic acids, but is attacked by strong oxidising acids such as concentrated sulphuric acid, and is swollen by some organic solvents.
Processing shrinkage is typically between 0.4-0.7%.