DOW Electrical Telecommunications DFDA-4850 NT Dow Polyethylene, Low Density

Product Description

DFDA-4850 NT is a low density, thermoplastic, unfilled polyethylene compound designed for starting-up and shutting-down medium and high voltage (5 kV and higher) power cable insulation extruders. It has a high degree of cleanliness required for these applications. DFDA-4850 NT is a nominal 2.0 melt index, 0.92 density, high pressure LDPE resin that has been stabilized with an antioxidant system that is compatible with HFDB-4201 EC, HFDB-4201 SC and HFDB-4202 EC.

Cleanliness Requirements
DFDA-4850 NT is required to meet strict standards for cleanliness as established by The Dow Chemical Company for an unfilled, thermoplastic insulation purge-type compound. The product is tested to ensure a high level of cleanliness. Pellet samples are visually inspected and extruded tapes are scanned by an automatic inspection system in a class 10,000 clean room. The purity data is managed using an acceptance sampling plan which ensures that the product in the shipping container meets or exceeds the required cleanliness standards.

General

Material Status

Commercial: Active

Availability

Africa & Middle East

Asia Pacific

Europe

Latin America

North America

Additive

Antioxidant

Uses

Purging Compound

Start-up Material Insulation

Wire & Cable Applications

Forms

Pellets

Physical	Nominal Value	Unit	Test Method
Specific Gravity			ASTM D792
Melt Mass-Flow Rate (MFR) (190°C/2.16 kg)		g/10 min	ASTM D1238
Related Terminology
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Uses
Uses may also be described by the following terms: Wire and Cable Applications, Wire & Cable Applications, Start-up Material Insulation.

Extrusion	Nominal Value	Unit
Melt Temperature		°F
Extrusion Notes
DFDA-4850 NT is a thermoplastic compound designed to be compatible with power cable insulation compounds produced by The Dow Chemical Company. Although DFDA-4850 NT is a thermoplastic material and can withstand higher extrusion melt temperatures than vulcanizable compounds, melt extrusion temperatures in the range of 240 to 280°F (116 to 140°C) are recommended. This melt temperature range is recommended to reduce the potential for premature crosslinking (or scorch) in the vulcanizable compound when transitioning to or from DFDA-4850 . Process modifications should not be required during transitions to or from the DFDA-4850 NT and HFDB-4201 EC, HFDB-4201 SC or HFDB-4202 EC.

Notes

¹Typical properties: these are not to be construed as specifications.

DOW™ Electrical & Telecommunications DFDA-4850 NT

Polyethylene Thermoplastic Start-up and Transition Material

Supplied by The Dow Chemical Company