Technical datasheet

HI 425TVL

Supplied byKumho Petrochemical- Last Updated on Sep 28, 2025

HI 425TVL by Kumho Petrochemical is a high flow, high impact polystyrene (HIPS) grade. Offers high impact strength, good electrical properties, good water resistance, and good dimensional stability without toxicity. Is suitable for processing by low pressure gas injection molding. HI 425TVL is recommended for TV cabinet applications. It complies with the US FDA, EU food hygiene standards, RoHS and UL 94 HB flame rating.
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HI 425TVL properties

Flammability properties

PropertiesValue & unitTest conditionTest method
Auto-ignition Temperature0.0 Visible After LoginVisible After LoginVisible After Login
Flame Rating0.0 Visible After LoginVisible After LoginVisible After Login

Mechanical properties

PropertiesValue & unitTest conditionTest method
Flexural Modulus0.0 Visible After LoginVisible After LoginVisible After Login
Flexural Strength0.0 Visible After LoginVisible After LoginVisible After Login
Hardness, Rockwell0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Izod0.0 Visible After LoginVisible After LoginVisible After Login
Tensile Elongation0.0 Visible After LoginVisible After LoginVisible After Login
Tensile Strength0.0 Visible After LoginVisible After LoginVisible After Login

Physical properties

PropertiesValue & unitTest conditionTest method
Density0.0 Visible After LoginVisible After LoginVisible After Login
Linear Mold Shrinkage0.0 Visible After LoginVisible After LoginVisible After Login
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)0.0 Visible After LoginVisible After LoginVisible After Login
Water Absorption0.0 Visible After LoginVisible After LoginVisible After Login

Thermal properties

PropertiesValue & unitTest conditionTest method
Heat Deflection Temperature (HDT)0.0 Visible After LoginVisible After LoginVisible After Login
UL RTI, Electrical0.0 Visible After LoginVisible After LoginVisible After Login
UL RTI, Mechanical with Impact0.0 Visible After LoginVisible After LoginVisible After Login
UL RTI, Mechanical without Impact0.0 Visible After LoginVisible After LoginVisible After Login
Vicat Softening Temperature0.0 Visible After LoginVisible After LoginVisible After Login

HI 425TVL Processing Guidelines

Injection Molding Processing Guidelines

PropertiesValue & unitTest conditionTest method
Drying TemperatureVisible After LoginVisible After Login
Drying TimeVisible After LoginVisible After Login
Front TemperatureVisible After LoginVisible After Login
Hopper Throat TemperatureVisible After LoginVisible After Login
Middle TemperatureVisible After LoginVisible After Login
Mold TemperatureVisible After LoginVisible After Login
Nozzle TemperatureVisible After LoginVisible After Login
Rear TemperatureVisible After LoginVisible After Login

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