Knowde Enhanced TDS
Identification & Functionality
- Polymer Name
- Plastics & Elastomers Functions
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Key Characteristics
Low smoke, low toxicity, halogen free, flame retardant, silane crosslinkable compound for the production of flexible heat shrinkable tubing.
Applications & Uses
- Markets
- Cure Method
- Plastics & Elastomers End Uses
- Plastics & Elastomers Processing Methods
Properties
- Appearance
- Pellets
- Mechanical Properties
- Physical Properties
- Electrical Properties
- Fire & Smoke Properties
| Value | Units | Test Method / Conditions | |
| Elongation at Break | 200 | % | IEC 60811-501 |
| Tensile Strength (After Thermal Aging: 7 Days at 135°C) | max. 25 | % Variation | IEC 60811-401 |
| Elongation Under Load (35lb/mm² at 150°C) (Cure Assessment:) | max. 180 | % Retention | Internal Method |
| Tensile Strength (at Break) | 10 | N/mm² | IEC 60811-501 |
| Elongation at Break (After Thermal Aging: 7 Days at 135°C) | max. 25 | — | — |
| Value | Units | Test Method / Conditions | |
| Density | 1.4 | g/cm³ | BS EN ISO 1183-3 |
| Melt Flow Rate (at 21.6kg / 150 0176C) | 15 | g/10 min | Internal Method |
| Value | Units | Test Method / Conditions | |
| Dielectric Strength | 14 | k/Vmm | IEC 60243 |
| Volume Resistivity | 10^13 | Ohm-cm | BS EN 50325 |
| Value | Units | Test Method / Conditions | |
| Conductivity of Gases | 13 | μS/cm | IEC 60754-2 |
| Corrosivity of Gases | 4.6 | pH | IEC 60754-2 |
| Temperature Index | min. 200 | °C | BS ISO 4589-3 |
| Temperature Index | min. 392 | °F | BS ISO 4589-3 |
| Halogen Gas Evolution | max. 0.5 | % | IEC 60754-1 |
| Oxygen Index | 26 | % | BS ISO 4589-2 |
| Smoke Density | max. 3.5 | % | ASTM 2843:2004 |
Technical Details & Test Data
- Processing
Extruder - An extruder with an L/D ratio (length/diameter) between 15 and 24 and a screw with a compression ratio 1.2:1 are recommended.
Extruder Temperature Conditions - It is important that the melt temperature is not allowed to increase above 220oC. As a guide the following temperature profile is recommended:Zone #1 Zone #2 Zone #3 Zone #4 Head Die Celsius 130°C 150°C 170°C 180°C 190°C 190°C Fahrenheit 266°F 302°F 338°F 356°F 374°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 pre-curing.
Screw Water Temperature: Not mandatory, if present we recommend 40-60°C
Recommended Screen Pack: Spacer ring or breaker plate onlyHead & 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, a draw down ratio of 1.5:1 is recommended to avoid internal stresses.
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 Masterbatches - EVA, preferable, and PE based color masterbatches including black, up to a maximum of 1%, have no detrimental effect on the properties or crosslinking capability. It is recommended that all masterbatches including those containing the catalyst, should be thoroughly dried before use for 8 hours at 60°C or 4 hours at 80°C in a de-humidifying drier.
Packaging & Availability
- Packaging
The following possibilities are available:
- Moisture resistant sacks containing 25kg
- Boxes with heat sealed moisture resistant liner containing 600kg
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