Enhanced TDS
Knowde-enriched technical product data sheet
Identification & Functionality
- Chemical Family
- Polymer Name
- Plastics & Elastomers Functions
- Technologies
- Product Families
Features & Benefits
- Key Characteristics
Silane crosslinkable polyethylene for low voltage power cable insulation
Applications & Uses
- Markets
- Applications
- Cure Method
- Plastics & Elastomers End Uses
- Plastics & Elastomers Processing Methods
Properties
- Physical Form
- Appearance
- Pellets
- Mechanical Properties
Value Units Test Method / Conditions Elongation at Break 350 % IEC 60811 Elongation at Break (After Thermal Aging: 7 days at 135ºC) -2 % Variation IEC 60811 Elongation Under Load (20N/cm² at 200°C)(Cure Assessment by Hot Set Test: Forced Cured at 80°C in Water) max.100 % BS ISO 4589-2 Tensile Strength at Break (After Thermal Aging: 7 days at 135ºC) 4 % Variation IEC 60811 Tensile Strength (at Break) 18 N/mm² IEC 60811 - Physical Properties
Value Units Test Method / Conditions Density 0.925 g/cm³ BS EN ISO 1183-3 Melt Flow Rate (at 190°C / 21.6 kg) 0.9 g/10 min Internal Method - Electrical Properties
Value Units Test Method / Conditions Dielectric Strength (at 20°C) 21 k/Vmm IEC 60243 Permittivity (50Hz at 23°C) 2.2 - IEC 60250 Power Factor (50Hz at 23°C) 0.0004 - IEC 60250 Volume Resistivity (at 20°C) min. 1 x 10¹⁶ Ohm.cm IEC 60502 - Thermo-Mechanical Properties
Value Units Test Method / Conditions Cold Bend (at -70°C) Pass No Cracks IEC 60811
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 190oC. 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 170°C 180°C Fahrenheit 302°F 320°F 338°F 356°F 338°F 356°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 60-70°C
Recommended Screen Pack: 30, 100, 30 (mesh aperture per linear inch) or 600,150, 600 micronHead & 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 3.5 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.
Catalyst & Color Masterbatches - CM401 or CM493 catalyst masterbatch is normally added at 5% to 95% of SX408 graft. Low reactivity version, CM401/2, is also available and recommended for thin wall applications; this is normally added at 10% to 90% graft. An alternative catalyst masterbatch CM401CD or CM401CDS, containing a copper deactivator, are used where the material is required to undergo a 168-hour aging test at 150°C on bare copper conductor.
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
Storage & Handling
- Storage & Shelf Life
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 25°C.
- Avoid storage outside and in direct sunlight.
- Use within 8 hours of opening packaging.