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Rubber for molding

    Standard grade fumed rubber for molding has good physical properties, yellowing resistance and good processability. They are applicable to molded products with requirement for high transparency. E.g., keypads, sanitary products and industrial miscellaneous parts such as O-rings and sealing gaskets.

     

           Typical Properties:

    Category

    Item

    Rubber for molding

    MY D9130

    MY D9140

    MY D9150

    MY D9160

    MY D9170

    MY D9180

    MY D9190

    Appearance

    Transparent

    Vulcanization

    Hardness Shore A

    30±2

    40±2

    50±2

    60±2

    70±2

    80±2

    86±2

    Tensile strength MPa

    8.0

    8.0

    8.5

    8.5

    8.0

    8.0

    6.0

    Elongation at break %

    700

    600

    500

    400

    300

    200

    120

    Breaking set %

    8

    8

    8

    8

    8

    8

    6

    Tear strength B KN/m

    15

    20

    25

    25

    25

    20

    10

    Post-curing

    Hardness Shore A

    35±2

    45±2

    56±2

    66±2

    74±2

    84±2

    90±2

    Tensile strength MPa

    7.0

    7.5

    8.5

    8.5

    8.0

    7.5

    5.5

    Elongation at break %

    650

    550

    450

    400

    300

    200

    100

    Tear strength B KN/m

    10

    18

    20

    20

    20

    18

    8

    Specific density 25°C g/cm³

    1.07±0.04

    1.13±0.04

    1.15±0.04

    1.18±0.04

    1.22±0.04

    1.25±0.04

    1.26±0.04

    Compression set 180*22h %

    55

    45

    50

    50

    45

    40

    35

    Resilience %

    55

    50

    50

    50

    45

    40

    35

    Dielectric strength  kV/mm

    20

    20

    20

    20

    20

    20

    20

    Volume resistivity Ω.cm

    1.0 x 10¹⁵

    1.0 x 10¹⁵

    1.0 x 10¹⁵

    1.0 x 10¹⁵

    1.0 x 10¹⁵

    1.0 x 10¹⁵

    1.0 x 10¹⁵

    Physical data in the above table is for reference only.

    Vulcanization condition: 175℃× 5Min. Post-curing condition: 200℃ x 4h

     Addition of curing agent: liquid 2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane: 0.65%.

     

    Advantage:

    - Flexible processability

    - Flexible comprehensive physical properties

    - Good yellowing resistance

     

    Applications:

    - Used to manufacture silicone rubber products with requirement for high transparency, such as Keypads, sanitary products and O-rings


    Packing & Storage:

    - 20kg/ carton lined with plastic bags or sheets.

    - The products have a shelf life of 9 months from date of manufacture depending on the shore hardness if stored at room temperature in the originally sealed container.


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