DOW Electrical Telecommunications DFDA-7540 NT Dow Polyethylene, Linear Low Density

Product Description

DFDA-7540 NT is a linear low-density polyethylene (LLDPE) extrusion compound produced by the UNIPOL™ PE Process. It is a general purpose insulation that can be used as a high speed telephone singles insulation (air-core cable only; not recommended for jelly-filled cable) and high frequency coaxial inner skin. It combines excellent electrical properties with outstanding stress crack resistance.

Specifications:
DFDA-7540 NT meets the following raw material specifications:

ASTM D-1248 Type I Category 4, Grade E4, E5

Federal LP-390 C, II-L, Grade 3, Category 4

REA Specification PE-200, Appendix A

ISO 1872-PE

KHKN,18-D006

Cables insulated with DFDA-7540 NT using sound commercial extrusion practice, should meet the following industry cable specification:

ASTM: D 1351-02

EN-50290-2-23

IEC 60708

General

Material Status

Commercial: Active

Availability

Africa & Middle East

Asia Pacific

Europe

Latin America

North America

Uses

Communication Wire Insulation

Solid Insulation

Telecommunications

Wire & Cable Applications

Agency Ratings

Forms

Pellets

Physical	Nominal Value	Unit	Test Method
Density		g/cm³	ASTM D1505
Melt Mass-Flow Rate (MFR) (190°C/2.16 kg)		g/10 min	ASTM D1238
Environmental Stress-Cracking Resistance (10% Igepal, F0)		hr	ASTM D1693
Mechanical	Nominal Value	Unit	Test Method
Tensile Strength		psi	ASTM D638
Tensile Elongation (Break)		%	ASTM D638
Thermal	Nominal Value	Unit	Test Method
Brittleness Temperature		°F	ASTM D746
Electrical	Nominal Value	Unit	Test Method
Volume Resistivity (23°F)		ohm·cm	ASTM D257
Dielectric Strength² (0.125 in)		V/mil	ASTM D149
Dielectric Constant (1 Hz)			ASTM D1531
Dissipation Factor (1 Hz)			ASTM D1531
Related Terminology
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Uses
Uses may also be described by the following terms: Solid Insulation, Wire and Cable Applications, Wire & Cable Applications, Communication Wire Insulation.
Agency Ratings
This plastic material has 6 certifications from the following agencies (the number in parentheses shows the number of certifications for that agency): ASTM (2), REA (1), IEC (1), ISO (1), EN (1).

Extrusion	Nominal Value	Unit
Melt Temperature		°F
Extrusion Notes
DFDA-7540 NT provides excellent surface finish at high coating speeds. For optimum results, use melt extrusion temperatures in the suggested range of 400 to 425°F (204 to 220°C). However, specific recommendations for processing conditions can be determined only when the application and type of processing equipment are known.

Notes

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

²Method A (Short-Time)

DOW™ Electrical & Telecommunications DFDA-7540 NT

Linear Low Density Polyethylene Insulation Compound

Supplied by The Dow Chemical Company