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Plastics & Elastomers
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Plastics & Elastomers
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HI 425E

Technical Datasheet | Supplied by Kumho Petrochemical
HI 425E by Kumho Petrochemical is a high impact polystyrene (HIPS) grade. Offers high strength, high impact strength, good electrical properties, good water resistance, and good dimensional stability without toxicity. Is suitable for processing by extrusion and injection molding. HI 425E is recommended for disposable cups, food packing sheet, wrapping films, trays, and washing machines. It complies with the US FDA, EU food hygiene standards, RoHS and UL 94 HB flame rating.
Product Type
PS or GPPS (Polystyrene) > HIPS
Physical Form
Product Status

HI 425E Properties

Physical Properties

Value & Unit
Test Condition
Test Method
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)
4.5 g/10 min
(200°C, 5 kg)
ASTM D1238
Water Absorption
0.03 %
( )
1.03 g/cm³
( )

HI 425E Processing Guidelines

Injection Molding Properties

Value & Unit
Test Condition
Test Method
Nozzle Temperature
190 - 220 °C
Front Temperature
190 - 210 °C
Middle Temperature
180 - 200 °C
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