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        Rubber compound for hydraulic hose

        No.

        Test item

        Performance indexes

        1

                         Tensile strength MPa 

        8

        2

        Elongation at break% 

        250

        3

        Shore hardness (A)

        76±5

        4

        Scorch 121℃ min 

        20

        5

        Viscosity ML121℃1+4

        55~75

        6

        Aging: 90℃×24h Medium: Air (on basis of elongation)

        0.75

        7

        Ozone 40℃×720h   500pphm  No cracking at 20% elongation

        No cracking

        8

        100℃×72h 3# standard △V%

        0~100

        9

        H withdrawal (Φ0.3㎜)  N 

        100

        10

        Low-temperature brittleness of rubber sheet (℃) 

        -30℃

        11

        Low-temperature of hose

        -40℃

        12

        Specific gravity g/cm3

        1.43±0.03

        13

        Cure condition: 151℃×60 min, or 163℃×20 min


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