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General molded rubber

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

      

           Typical Properties:

    Category

    Item

    General molded

    MY D9530

    MY D9540

    MY D9550

    MY D9560

    MY D9570

    MY D9580

    MY D9590

    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

    8.5

    8.5

    8.5

    8.5

    8.0

    8.0

    Elongation at break %

    600

    500

    400

    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

    6.5

    7.0

    8.0

    8.0

    8.0

    7.0

    5.0

    Elongation at break %

    500

    400

    300

    300

    200

    150

    80

    Tear strength B KN/m

    10

    16

    18

    18

    18

    16

    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

    1.23±0.05

    Compression set 180*22h %

    55

    50

    50

    45

    45

    40

    35

    Resilience %

    55

    55

    50

    45

    40

    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:

    - Applicable to molded products with requirement for high transparency, such as sanitary products, 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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