Knowde Enhanced TDS
Identification & Functionality
- Polymer Name
- Plastics & Elastomers Functions
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Key Characteristics
Silane crosslinkable polyethylene, 125ºC rated, for low voltage power cable insulation
Applications & Uses
- Markets
- Applications
- Cure Method
- Plastics & Elastomers End Uses
- Plastics & Elastomers Processing Methods
Properties
- Appearance
- Pellets
- Mechanical Properties
- Physical Properties
- Electrical Properties
- Thermo-Mechanical Properties
| Value | Units | Test Method / Conditions | |
| Elongation at Break | 500 | % | IEC 60811-501 |
| Elongation at Break (After Thermal Aging: 240 hours at 155ºC) | -5 | % Variation | IEC 60811-401 |
| Elongation at Break (After Thermal Aging: 3000 Hours at 125ºC) | -11 | % Variation | IEC 60811-401 |
| Elongation Under Load (20N/cm² at 200°C) (Cure Assessment by Hot Set Test (Force cured at 80°C in Water) | max.100 | % | IEC 60811-507 |
| Tensile Strength (at Break) | 24 | N/mm² | IEC 60811-501 |
| Permanent Elongation (After Cooling) | 0 | % | IEC 60811-507 |
| Tensile Strength (After Thermal Aging: 240 hours at 155ºC) | 4 | % Variation | IEC 60811-401 |
| Tensile Strength (After Thermal Aging: 3000 Hours at 125ºC) | 1 | % Variation | IEC 60811-401 |
| Value | Units | Test Method / Conditions | |
| Density | 0.92 | g/cm³ | BS EN ISO 1183-3 |
| 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 | BS EN 50395 |
| Value | Units | Test Method / Conditions | |
| Cold Bend (at -70°C) | Pass | No Cracks | IEC 60811-504 |
| Insulation Thickness: 0.8mm (Cure Assessment by Ambient Cure: 20°C & 50% Humidity) | 5 | Days | <100% Hot Set |
| Insulation Thickness: 1.5mm (Cure Assessment by Ambient Cure: 20°C & 50% Humidity) | 14 | Days | <100% Hot Set |
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 185°C 190°C Fahrenheit 302°F 320°F 338°F 356°F 365°F 374°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; this particular system has ambient cure, usually between 5 and 7 days.
Color Masterbatches - The choice of catalyst will be based on conductor size, processing conditions and equipment; our technical team can assist with this choice. 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
The following possibilities are available:
- Moisture resistant sacks containing 25kg
- Boxes with a moisture resistant heat sealed liner containing approximately 500kg
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 30°C
- Avoid storage outside and in direct sunlight
- Use within 8 hours of opening packaging