• XH-21A (85 ℃ non flame retardant rubber sheath)
XH-21A (85 ℃ non flame retardant rubber sheath)
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XH-21A (85 ℃ non flame retardant rubber sheath)

This material is based on chlorinated polyethylene

Still deciding? Get the samples first,Contact us!

XH-21A (85 ℃ non flame retardant rubber sheath)

This material is based on chlorinated polyethylene

Still deciding? Get the samples first,Contact us!

  • Description
  • Product Description 
    This material is based on chlorinated polyethylene and mixed with other additives. It has flame retardant, oil resistant, wear-resistant, tear resistant, cold resistant, weather resistant, and excellent mechanical properties. The performance exceeds the XH-21A sheath in GB7594-87 standard. Due to its excellent performance, good extrusion appearance, good flexibility, light weight (low density) of cables, and low cost, it has become an ideal substitute for traditional materials such as chloroprene rubber and chlorosulfonated polyethylene rubber as base rubber sheaths in marine cables. 
    Product Usage 
    This material is developed according to the latest national standards for marine cables. Whether it is vulcanized test pieces or products produced by continuous vulcanization of extruded rubber, the performance meets or exceeds the standard requirements. The XH-21A sheath material specified in GB7594-87 standard is composed of a mixture of chloroprene rubber and other equivalent materials, with a long-term allowable working temperature of 85 ℃. GB9331-2008 marine cables have requirements for low temperature resistance and bundled combustion, and this material can meet the requirements for product use. 
    Comparison of material properties and standard requirements

    Experimental project

     

    Unit

    GB7594-87 
    XH-21A

    Typical values

    Mechanical properties before aging

     

     

     

     

    Tensile strength

     

    MPa

    ≥10.0

    12.5

    Elongation at break

     

    %

    ≥300

    457

    Mechanical properties after 7 days of aging at 100 ℃

     

     

     

     

    Change rate of tensile strength

     

    %

    -15~+15

    -6

    Change rate of elongation at break

     

    %

    -25~+25

    -7

    Thermal extension test

     

     

     

     

    Experimental conditions

    Test temperature

    200

     

     

    Load time

    min

    15

     

     

    Mechanical stress

    MPa

    0.2

     

    Elongation under load

     

    %

    ≤175

    15

    Permanent deformation after cooling

     

    %

    ≤25

    8.6

    Mineral oil immersion test

     

     

     

     

    Experimental conditions

    Oil temperature

    100±2

     

     

    Oil immersion time

    h

    24

     

    Change rate of tensile strength

     

    %

    -40~+40

    -5

    Change rate of elongation at break

     

    %

    -40~+40

    -2

    -35 ℃ low-temperature tensile test

     

     

     

     

    Minimum elongation at break

     

    %

          30

    90

    Burning time (T5120 ℃)

     

    min

     

    > 30

    Processing process parameters
    It is recommended to use CV (continuous vulcanization) production line for extrusion production.
    Extruder compression ratio: 1.1:1 to 1.5:1;
    Extruder length to diameter ratio: 6:1 to 16:1 (if it is less than 10:1, it is recommended to use hot feed);
    Extruder temperature: 65-85 ℃;
    Sulfurization temperature: 165-185 ℃.
    Packaging and Storage
    The material has a rectangular film shape (which can also be packaged and changed according to customer requirements), and should be stored in a clean, dry, and ventilated warehouse.

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