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Rubber/the tensile in EPDM


how I can increase the tensile strains from 6 to 10
i used EPDM (sulphure cure),carbon 60%,CaCO3 10%,MPT,tmtd,ZnO,stearic acid and DOP

Dear Mr. Medhat,

You can increase the tensile strength of your EPDM compound as mentioned below:
1 - Replace part of the EPDM rubber for a crystalline type;
2 - Replace part of the CaCO3 by precipitated silica;
3 - Use a silane type Si-69 in your formulation - approximately 3% over the White filler

Best Regards



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Luis Antonio Tormento


Operational Chemical Engineer with specialization in rubber compounding and processing: - Vast knowledge on rubber molding techniques: extrusion, press and injection molding. - Marketing expertise on the development of applications of rubber chemicals, precipitated silica and specialty rubbers. - In his career he developed numerous production compounds for automotive and industrial hose, rubber mats, retread compounds, tire compounds, shoe soles and molded products. TPE/TPV/TPO applications


I have 36 years working in plant processing of hose, tire, shoes and press/injected cured rubber compounds and technical assistance for two big raw material suppliers: Chemtura and Nitriflex. Actually I have my own company

2006-2011 - Rubber Division Director - Brazil Rubber Group 2008-2009 - Vice President - Brazil Rubber Group 2002-2007 - President - Brazil Rubber Group 2000-2001 - Technical Director - Brazil Rubber Group

Several papers published on magazines, congress and conferences about rubber processing and compounding

Chemical Engineer by FEI - Brazil (1979) Advanced Rubber Technology - Rubber Division (1992) University Expert on Plastic and Rubber - UNED (Spain) - 2002

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