Mixing – EPDM Rubber Compounds | Custom Rubber Mixing and Formulating Capability
Hebei Shida Seal Group manufactures high-quality rubber parts which require compounds that meet exacting standards for performance and we have the ability to develop special and specific formulations for customers’ applications.
Our custom rubber mixing and formulating capabilities include compound development, internal mixing and open mill mixing of black or colored compounds (strips, slabs, and calendared ). Our state-of-the-art mixing facility is equipped with 1 internal mixer (dispersion kneader), and 3 open mills dedicated to the mixing of EPDM. Custom mixed rubber compounds are used for rubber extrusions and molded rubber products.
To avoid premature vulcanization, a two-stage mixing process is employed:
♦ Stage A: CMB (Carbon Master Batch) production
Mix rubber polymer, non-vulcanizing ingredients like carbon black, silica, softener, plasticizer and process oil physically in the internal mixer.
♦ Stage B: FMB (Finish Master Batch) production
After Stage A mixing has been completed and time for cooling has been allowed, Stage B mixing is carried out in which curatives (vulcanizing agents) like sulfur, accelerators, peroxides into CMB(Carbon Master Batch).
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| Raw Materials Warehouse:
Polymers like EPDM, NBR, carbon black, ingredients, additives. |
Formulating:
Weigh formulation ingredients into specified batches. (semi-automatic weighing system) |
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| Mixing:
Internal mixing, open mill mixing, calendering. (a two-stage mixing approach) |
Rubber Compound:
Stored in temperature-controlled room, in strip and slab form to suit specific requirements. |
Main Polymer Suppliers:
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| ExxonMobil Chemical | Dow Chemical |
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| SK Chemicals | Sumitomo Chemical |