A Low Density Cross Linkable Polyethylene compound consisting of 3 Components i.e. Grafted Polymer – Grade KI-XL-03, Catalyst Master Batch KI-XL-04 a specially designed Master Batch, KI-XL-ABC packed separately. The components are to be mixed in ratio of 90:5:5 parts just before consumption. Such system allows the compound to be extruded as a normal thermoplastic in a conventional PE (or even PVC) extrusion line. The cross-linking step is subsequently carried out by immersion is hot water, or exposure to steam. In each case, time of curing is to be optimized as a function of thickness of insulation, concentration of catalyst and temperature. The formulation ensures delivery of requisite amount of carbon black in finished cable.
SPECIFICATIONS: KI-XL 03 / XL 04 / XL ABC combination meets requirements as applicable under following standards, when processed using sound extrusion practice and testing procedure; • IS-7098 Part 1 / IS 10810 • BS 5467, 5468, 6724, 7655 • IEC 60502 TYPICAL PROPERTIES: A) XL-03 Property Unit Typical Value Test Method Density gm /cm3 0.923 – 0.925 ASTM-D-792 Melt Flow Index (190°C, 2.16 Kg) gm / 10 Min 0.6 – 2.0 IS-10810 (Part-23) / ASTM-D-1238 Contamination No./Kg < 5 KIIL B) XL-03 / XL-04 / XL-ABC Combination Mixed at 130°C at 90:5:5 parts for 3 minutes, compression mould to a sheet of 1.5 mm thickness cured by immersion in water at 95°C for 3 hrs; conditioning for 3 hrs. Property Unit Typical Value Test Method Tensile Strength MPa 16 - 19 IS-10810 Part-7 / ASTM-D-638 Elongation at break % 500 – 600 IS-10810 Part-7 / ASTM-D-638 Hot set at 200 °C a) Hot Elongation after 15 min. b) Permanent Set after after 5 min % % 60 – 90 + 5 IS-10810 Part-30 / IEC 60811-507 -- do -- Oven ageing at 135 °C, 168 hours a) Variation in Tensile Strength b) Variation in Elongation at Break % % + 15 + 15 IS-10810 Part-11 / IEC 60811-401 IS-10810 Part-11 / IEC 60811-401 Volume Resistivity @ 25°C Ohm-cm 1 X 1015 ASTM –D-257 Dissipation factor @ 250V / 50 Hz, 25°C - 0.007 ASTM-D-150 Dielectric Constant @ 250V / 50Hz, 25°C - 2.6 ASTM-D-150 PROCESSING GUIDELINES : It is recommended to dry the Catalyst Master Batch at 60°C in air oven in 4-6 cm layers for 8–12 hours. The Grafted Polymer should never be pre-heated. The Grafted Polymer, Catalyst Mater Batch and special additive should be manually mixed at a ratio 90:5:5 at room temperature, just before consumption. Mixing in large quantities should be avoided, since such leftover premix cannot be stored. It is important that the extruder should not be kept idle for more than 10 minutes when filled with XL 03 / XL 04 premix. It should be kept running at Low RPM if it is desired to change over size of conductor etc. PACKAGING: • Moisture Barrier Multilayer Bags of 25 kg. • 20’ FCL will take palletized 11 MT. & 40’ FCL will take 24.75 MT. STORAGE: The shelf life of the product is 90 days (In case of Export packaging the shelf life is guaranteed for 180 days instead of 90 days) from the date of production, subject to following conditions: • Storage temperature not generally exceeding 25°C. • Away from direct sunlight and weathering. • Closed and unbroken bags. • Use of compound within 3-4 hours after bags are open.
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