PS injection molding processing condition

Drying	Not usually required unless stored improperly. If drying is needed, the recommended conditions are 2-3 hours at 80 C (176 F).
Melt Temperature	180 - 280 C (356 - 536 F); upper limit is 250 C for flame retardant grades (19 - 158 F)
Mold Temperature	Suggested: 20 - 70 C (68 - 158 F)
Material Injection Pressure	20 - 60 MPa
Injection Speed	Fast speeds are recommended

Runners and Gates

All types of conventional gates may be used.

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Chemical and Physical Properties

General-purpose PS is produced by the polymerization 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 oxidizing acids such as concentrated sulfuric acid, and is swollen by some organic solvents.

Processing shrinkage is typically between 0.4 - 0.7%.

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