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Tuesday, May 4, 2010



Trident designs and manufactures rubber masterbatches as well as activated, ready-to-use rubber compounds. The standards to which we work are ASTM, DIN, SAE, BS and ANSI.

The rubbers we currently work with are:
    • Natural Rubber (NR)
    • Polybutadiene Rubber (PBR)
    • Styrene Butadiene Rubber (SBR )
    • Acrilonitrile Butadiene Rubber (NBR)
    • Blends of NBR and Polyvinyl Chloride (NBR/PVC)
    • Ethylene Propylene Diene Monomer (EPDM)
    • Polychloroprene (CR)
    • CSM (Hypalon)
    • AEM (Vamac)
    • Epichlorohydrin (ECO)

Masterbatches are normally a mix of one or more polymers, reinforcing fillers, process aids and process oils. This is the intermediate stage of rubber compounding operations.

Compounds are the downstream products of masterbatches. With the incorporation of activators, anti-oxidants, anti-ozonants, special additives, Sulfur and accelerators, the masterbatches metamorphose into rubber compounds that are ready to be used in the manufacture of various rubber articles, either by extrusion and curing, calendering and curing or molding. The compounding process involves internal mixing of the masterbatch with activators and process aids, followed by blending of Sulfur and accelerators on open- roll mixing mills, from which it is stripped or sheeted out to required dimensions and cooled immediately to prevent cross-linking from setting in.

Masterbatches have very long shelf-life, due to which it is the form preferred by our overseas customers. Compounds have comparatively lower shelf-life, but we have customers in Europe who have used our EPDM compounds in ready-to-mould strips of specific dimensions with shelf-life of more than 3 months.

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