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    Materials for EPR Mine Cables
    1.Product Names and Types
    Number Product Type Application
    1 90℃6-10KV high pressure EPR insulation material ZL9211-J The series of materials Can be used for no more than 10 kv insulation of rubbers sleeve flexible mine cables.
    2 90℃3KV medium pressure EPR insulation material ZL9212-J
    3 90℃1KV low pressure EPR insulation material ZL9213-J
    4 90℃0.5 KV low pressure EPR insulation material ZL9214-J
    5 medium pressure peelable insulation and shielding material ZL9216-PB Can be used for 1-10kv shield of rubbers sleeve flexible mine cables.
    6 medium pressure conductor shielding material ZL9218-P
    7 65℃ Flame-retartant rubber sheath material for mine cables ZL9211-H Can be used for sheath of rubbers sleeve flexible mine cables.

    2.Product Description
    The materials are of natural color/white color and particle shape, with the basic material of rubber (e.g. EPDM). The hyperoxides are cross-linked mixture of the main vulcanizing system. They can be used in CV (continuous vulcanizing) extrusion product line. The properties are in line with the national standards such as MT 818 etc.

    2.2 Machining Process
    2.2.1 Drying treatment should be carried out before the production use.
    2.2.2 The CV (continuous vulcanizing) extrusion product line Can be used for production. It is recommended to use screw rods with length-to-diameter ratios between 15:1 and 24:1.
    2.2.3 Before extrusion, clean screw rods to make sure product cleanness. It is suggested to add filter screens with sieve number of 20/40 or 20/60 in front of the die to avoid impurity entering during the extrusion process, and to keep flux pressure in order to obtain good appearance and material compaction.
    2.2.4.Extruding Temp
          Zone 1  Zone 2  Zone 3   Zone 4  Head die orifice
    ZL9211-J: 75℃    80℃    85℃    85℃    90℃    85℃
    ZL9212-J: 80℃    90℃    95℃    99℃    99℃    95℃
    ZL9213-J: 80℃    90℃    95℃    99℃    99℃    95℃
    ZL9214-J: 75℃    80℃    85℃    85℃    90℃    85℃
    ZL9216-PB:75℃     80℃       85℃        85℃       90℃        85℃
    ZL9218-P: 75℃       80℃       85℃       85℃       90℃        85℃
    ZL9211-H: 75℃       80℃       85℃       85℃       90℃        85℃