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Marlex® 4571 Polyethylene

Technical Datasheet | Supplied by Chevron Phillips Chemical

Marlex® 4571 Polyethylene (Old Name: MarFlex® 4571) by Chevron Phillips Chemical is a low density polyethylene grade. It does not contain slip or antiblock additives. It is tailored for cast film extrusion application. This grade exhibits high speed extrusion, low neck-in, edge tear resistance, high coefficient of friction and good drawdown. Marlex® 4571 Polyethylene is used in general purpose applications.

Marlex® 4571 Polyethylene Properties

Physical Properties

Value & Unit

Test Condition

Test Method

Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)

4.1 g/10min

(At 190°C, 2.16 kg)

ASTM D1238

Density

0.924 g/cm³

ASTM D1505

Water Vapor Transmission Rate (WVTR)

13 g/m²/day

(At 1.25 mil, Produced using a smooth bore extruder at a rate of 7 lb/in die cast film line)

ASTM F1249

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