Key Features of High Impact Polystyrene

• A melt temperature of 180-220 C is generally used.
• Have a broad processing window and can be processed on most standard machinery.
• Pre-drying is not always needed for injection moulding with a vented cylinder but if drying is needed then 4 hours at 80 C is generally sufficient.
• Signs of moisture are stripes, streaks or bubbles in the moulding and if any of these are seen then the material should be pre - dried.