PEXIDAN® SX505

1 of 49 products in this brand
PEXIDAN® SX505:CM493 and SX505:CM497 is a silane crosslinkable rubber compound, curable when exposed to moist conditions. The compound can be processed on largely standard thermoplastic extrusion equipment with good extrusion properties at high output rates. The graft component SX505 is mixed with a crosslinking catalyst masterbatch CM493 or CM497 generally in the ratio 95:5. CM497 is a lower strength catalyst masterbatch and is used on thin wall extrusion or to reduce premature crosslinking during processing. The SX505:CM493 or SX505:CM497 systems have passed type-tests for use up to and including 33 kV. PEXIDAN® SX505 is a zero-halogen material and is used as insulation in Low Smoke Zero-Halogen (LSZH) cable constructions

Polymer Name: Ethylene Propylene Copolymer

Density: 900.0 - 900.0 kg/m³

Technical Data Sheet
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Identification & Functionality

Technologies

Features & Benefits

Labeling Claims
Key Characteristics

Silane crosslinkable EPR compound for low and medium voltage power cable insulation

Applications & Uses

Plastics & Elastomers End Uses

Properties

Physical Form
Mechanical Properties
ValueUnitsTest Method / Conditions
Elongation at Break350%IEC 60811-501 UL 1581 & UL 2556
Elongation at Break (After Thermal Aging: 7 Days at 135°C)-10% VariationIEC 60811-401 UL 1581 & UL 2556
Elongation Under Load (20N/cm² at 200°C)40%IEC 60811-507
Tensile Strength (at Break)9N/mm²IEC 60811-501
Hot Elongation Test (Elongation Under Load: 20 N/cm2 load at 250°C)max. 40%SACO AEI DWI-QA-4007 based on ICEA T-28-562
Ozone ResistancePassIEC 60811-403
Permanent Elongation after Cooling0%IEC 60811-507
Permittivity (50Hz at 23°C)2.29IEC 60250
Power Factor (50Hz at 23°C)0.00016IEC 60250
Tensile Strength (After Thermal Aging: 7 Days at 135°C)12% VariationIEC 60811-401 UL 1581 & UL 2556
Tensile Strength at Break9 (1305)
Volume Resistivity (at 20°C)min. 1 x 10¹⁶Ohm.cmASTM D6095 BS EN 50395
Physical Properties
ValueUnitsTest Method / Conditions
Density0.9g/cm³ASTM D792 BS EN ISO 1183-3

Technical Details & Test Data

Processing

Extruder - Most modern thermoplastic extruders will process this compound, particularly if a screw suitable for polyethylene extrusion is available.

Extruder Temperature Conditions - It is important that the melt temperature is not allowed to increase above 195oC. As a guide the following temperature profile is recommended

  Zone #1 Zone #2 Zone #3 Zone #4 Head Die
Celsius 150°C 160°C 170°C 180°C 190°C 200°C
Fahrenheit 302°F 320°F 338°F 356°F 374°F 392°F

This profile will vary slightly depending on extruder type, head design and output. Initial purging of the extruder should be performed without the addition of catalyst masterbatch to reduce risks of precuring.

Screw Water Temperature – Not mandatory, if present we recommend 50-60°C Recommended Screen Pack - 30, 50 mesh (mesh aperture per linear inch) or 600,300 micron

Head & Tool Design - The head and tools should be so designed as to allow streamlined flow without the possibility of stagnation of material (where pre-curing could take place). To obtain the optimum in physical properties in the case of tubing tools, it is generally recommended that a draw down ratio not greater than 2,6 is used.

Crosslinking or Cure - A fast cure can be obtained either by immersion in hot water or exposure to low pressure steam at a temperature up to 70°C.

Color & Masterbatch - The choice of catalyst will be based on conductor size, processing conditions and equipment; our technical team can assist with this choice. CM497 is a low reactive catalyst masterbatch and is normally used in low wall thickness cables to prevent pre crosslinking. Addition of approved color masterbatches, including black, up to a maximum of 1%, has no detrimental effect on the properties or crosslinking capability.

It is recommended that all masterbatches, including those containing the catalyst, should be thoroughly dried at 60°C for 8 hours or at 80°C for 4 hours.

Packaging & Availability

Packaging Information

The physical form of both SX-505 and CM493 or CM497 is free-flowing pellets. The following possibilities are available: 

  • Moisture resistant sacks containing 25kg 
  • Boxes with a moisture-resistant heat sealed liner containing 125kg, 500kg or 1000kg.

Storage & Handling

Storage and Handling

A period of at least 6 months from date of manufacture can normally be expected. The following storage conditions are recommended:

  • Packaging should remain sealed
  • Avoid temperature above 30°C
  • Avoid storage outside and in direct sunlight
  • Use within 8 hours of opening packaging