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TPJ 302 MD is a medium density polyethylene black jacketing compound combining excellent processing and environmental stress crack performance. It contains a well dispersed carbon black, to impart excellent UV degradation resistance, and an antioxidant package to impart excellent resistance to thermo-oxidative degradation.
TPJ 302 MD is for jacketing of medium / high voltage power & telephone cables produced at high extrusion speeds.
TPJ 302MD complies with the following raw material specification & jacketed cables standards.
ASTM D 1248 Type 2, Class C, Category 4, Grade J4, E8, E9
ICEA S-84-608-1994, BS 6234: Type 03C, TS1 /TS2
IEC 60502: Type ST3/ST7, IEC 60840: Type ST3/ST7
| Tests | Test Method | Unit | Typical Values |
| Density | ASTM D1505 | g / cm³ | 0.948 |
| Melt flow rate | ASTM D1238 | g /10min. | 0.8 |
| Carbon Black Content | ASTM D1603 | Wt % | 2.56 |
| Tensile Strength(1) | IEC 60811-1-1 | MPa | 21 |
| Elongation at break(1) | IEC 60811-1-1 | % | 650 |
| Environmental Stress Cracking (F20) | IEC 60811-4-1/B | h | >1000 |
| Dielectric Strength (2) | IEC 60243 | KV/mm | >21 |
| DC Volume Resistivity (2) | ASTM D 257 | Ω.cm | 1 x 1015 |
(1)Tests performed on 0.8 mm extruded tape. (2)Tests performed on 2 mm pressed sheet.
TPJ 302MD pellets available in the following packages: -
* 25 kg moisture resistant heat sealed sacks and palletized, net weight 500 kg stretch wrapped for environment protection.
* 500 / 1000 kg Boxes with moisture resistant liner, palletized boxes stretch wrapped for environment protection.
TPJ 302MD possesses excellent extrusion characteristics; as a general guide, a melt temperature in the range of 210oC to 230oC yields satisfactory results. Precise temperature profile values will vary depending on the extruder type, die tooling, cable size and line speed employed.
TPJ 302MD must be stored unopened in a dry & stable temperature environment for optimum performance. A temperature range of 10 oC to 45 oC is recommended