DOW™ Electrical & Telecommunications DGDK-6924 NT EXP1
Описание материалов:
DGDK-6924 NT EXP1 is a high density polyethylene compound designed for use in physical foaming processes where high expansion rates (40 - 70%) are required. This compound is designed to offer excellent high speed processability as given by low extrusion pressures and smooth insulation surface quality. Furthermore, since it is fully pre-compounded with all the necessary ingredients, DGDK-6924 NT EXP1 offers better dispersion of the nucleating agent allowing high expansion rates to be achieved with more consistent processability (capacitance and diameter). It is stabilized for long term cable performance in data cable applications.
Applications:
Typical applications include LAN and data center cables.
Specifications
DGDK-6924 NT EXP1 should meet the following material specifications:
- ASTM D 1248 Class A, Type III, Category 3
- ISO 1875-PE, KGHN, 45-D-045
Физический | Номинальное значение | Единица измерения | Метод испытания |
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Плотность 1 | 0.952 | g/cm³ | ISO 1183 |
Массовый расход расплава (MFR) (140°C/5.0 kg) | 5.5 | g/10 min | ISO 1133 |
Твердость | Номинальное значение | Единица измерения | Метод испытания |
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Твердость дюрометра 2(Shore D, 1 sec) | 65 | | ISO 868 |
Тепловой | Номинальное значение | Единица измерения | Метод испытания |
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Время индукции окисления (200°C) | > 50 | min | ASTM D3895 |
Электрический | Номинальное значение | | Метод испытания |
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Диэлектрическая постоянная 3(1 MHz) | 2.30 | | IEC 60250 |
Коэффициент рассеивания (50 Hz) | 1.0E-4 | | IEC 60250 |
Cured Properties | Номинальное значение | Единица измерения | Метод испытания |
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Прочность на растяжение 4 | 21.0 | MPa | IEC 60811-501 |
Удлинение при разрыве 5 | 1400 | % | IEC 60811-501 |
Экструзия | Номинальное значение | Единица измерения | |
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Температура расплава | 170 - 190 | °C | |
Инструкции по экструзии |
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DGDK- 6924 NT EXP1 can be processed using a range of commercial gas injection systems.It is normally extruded with a target melt temperature of 170 - 190 °C.Typical barrel temperatures required depend on extruder size and construction being made but a good starting point is:
Feed zone: 150 - 160 °C
Transition zone: 160 - 170 °C
Injection Point: 185 - 200 °C
Metering zone: 180 - 190 °C
Cross head and Die: 200 - 210 °C |
Примечание |
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1 . | On unannealed material from the melt flow rate extrudate |
2 . | Measured on compression moulded plaques |
3 . | Measured on compression moulded plaques |
4 . | Measured on extruded tape |
5 . | Measured on extruded tape |