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SI-LINK™ DFDA-5451 NT

Crosslinkable Polyethylene for Moisture Curable Power Cable Insulation

Supplied by The Dow Chemical Company

The technical datasheet with complete property values for SI-LINK™ DFDA-5451 NT is available to members of the Prospector Plastics Database.
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Product Description
SI-LINK™ Crosslinkable Polyethylene DFDA-5451 NT is an ethylene-silane copolymer developed for use in power cable and control cable applications up to 1 kV.

DFDA-5451 NT may be crosslinked after it is extruded with the DFDB-5480 NT catalyst masterbatch by exposing it to moisture after cable manufacture. If a black product is required for UV protection, the addition of DFDB-5410 BK carbon black masterbatch is recommended.

Because the catalyst and carbon black masterbatches are shipped separate from the DFDA-5451 NT copolymer, the components are very shelf stable. Crosslinking of the total system only occurs after hot melt mixing of the components and exposure to moisture.

Specifications
When DFDA-5451 NT is crosslinked with DFDB-5480 NT, and optionally, DFDB-5410 BK, it meets typical 1 kV or less low voltage specifications such as those in:
  • UL 854
  • ICEA: S-66-524
  • CSA RW90
  • IEC: 60502-1
General  
Material Status 
  • Commercial: Active
Availability 
  • Africa & Middle East
  • Asia Pacific
  • Europe
  • Latin America
  • North America
Uses 
  • Low Voltage Insulation
  • Wire & Cable Applications
  
Agency Ratings 
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
Mechanical
Nominal Value
Unit
Test Method
Tensile Strength 2
psi
 ASTM D638
Tensile Elongation 2 (Break)
%
 ASTM D638
Thermal
Nominal Value
Unit
Test Method
Hot Creep - 15 min, 20N/cm² 3 (302°F)
%
 ICEA T-28-562
Hot Set - 15 min, 0.2 MPa 3 (392°F)
%
 IEC 60811-2-1
Aging
Nominal Value
Unit
Test Method
Retention of Tensile Elongation - 7 days 2 (250°F)
%
 ASTM D638
Retention of Tensile Strength - 7 days 2 (250°F)
%
 ASTM D638
Electrical
Nominal Value
Unit
Test Method
Dielectric Constant 2 (1 kHz)
 
 ASTM D150
Dissipation Factor 2 (60 Hz)
 
 ASTM D150
Related Terminology
Product names can be difficult to match. You may have searched any one of these terms to find this product: SI-LINK™ DFDA-5451 NT, SILINK DFDA5451 NT, SI-LINK™ , SILINK, SI:LINK™, SI/LINK™, SI+LINK™, SI_LINK™, SI LINK™, SILINKDFDA5451NT, SI_LINK, SI LINK, DFDA, DFDA-5451 NT, DFDA5451 NT, DFDA:5451 NT, DFDA/5451 NT, DFDA+5451 NT, DFDA_5451 NT, DFDA 5451 NT, DFDA5451, 5451NT, DFDA5451NT, DFDA_5451NT, Polyethylene Copolymer, PE Copolymer, Polyethylene, PE, Dow, PolyethyleneCopolymer, PECopolymer, 5451DFDA
Uses
Uses may also be described by the following terms: Low Voltage Insulation, Wire and Cable Applications, Wire & Cable Applications.
Agency Ratings
This plastic material has 3 certifications from the following agencies (the number in parentheses shows the number of certifications for that agency): UL (1), ICEA (1), IEC (1).
Extrusion
Nominal Value
Unit
 
Drying Temperature
°F
  
Drying Time
hr
  
Melt Temperature
°F
  
Extrusion Notes
DFDA-5451 NT will extrude with excellent surface quality and without extrusion scorch if the accompanying catalyst masterbatch, DFDB-5480 NT and the carbon black masterbatch, DFDB-5410 BK, are kept dry. It is especially recommended that the catalyst and carbon masterbatches be dried at 140°F-160°F (60°-70°C) for four to six hours using dehumidified air prior to mixing and extrusion. Melt temperatures in the range of 300°F-450°F (150-230°C) have been successfully used.

After extrusion of the appropriate mixture of this product and its catalyst and carbon black masterbatches, cross-linking can be achieved by allowing moisture to diffuse into the product. Most fabricators find that a hot water bath or sauna works best. To achieve a hot creep elongation of 100%, the typical times shown below are required (45 mil [1.1 mm] wall on 14 AWG [2.1 mm²] wire).

  • 70°C: 10 hrs
  • 90°C: 3.5 hrs

Specific recommendations for your particular equipment and conditions can be determined by contacting your local Dow Wire and Cable sales representative.
Notes
1Typical properties: these are not to be construed as specifications.
2Crosslinked polyethylene properties (95% DFDA-5451 NT, 5% DFDB-5480 NT)
3Measured on 14 AWG (2.1 mm²) wire with a 30 mil (0.75 mm) wall after 4 hours curing in 90°C water.
Crosslinked polyethylene properties (95% DFDA-5451 NT, 5% DFDB-5480 NT)
 
IDES
Copyright © 2012 IDES
The information presented on this datasheet was acquired by IDES from the producer of the material. IDES makes substantial efforts to assure the accuracy of this data. However, IDES assumes no responsibility for the data values and strongly encourages that upon final material selection, data points are validated with the material supplier.