Optimal material from the high-tech forge

 

The robust, double bond-free backbone of Levamelt® consists of two components: Ethylene and vinyl acetate. Polymers with this principal structure are often referred to as EVA although the correct designation should be EVM according to rubber nomenclature.

In principle, EVM rubbers have been around for 60 years. However, the real skill lies in finding synthesis processes which can be used to optimally and extensively control the ethylene and vinyl acetate contents in the molecule. EVM grades with a high vinyl acetate content of around 40 % or above are of particular interest for sophisticated technical applications. However, the majority of EVM production methods are unable to produce this polymer cost-effectively.

The "medium pressure method" used at ARLARNXEO removes these limitations. The EVM grades synthesized at ARLANXEO by the solvent process have high molecular weights, a low number of branches and an adjustable VA content of between 40 and 90 % by weight.

Additional factors which are important for the characteristics profile of Levamelt® vulcanizates include a statistically even distribution of the components in the ARLANXEO polymer which ensures a high-quality property profile. The outstandingly low viscosity of the raw material enables absorption of high filler quantities.

At a glance:

  • Possible to achieve vinyl acetate content of between 40 and 90 %
  • Excellent characteristics typical of rubber from 40 % vinyl acetate upwards
  • First-class mechanical property profile
  • Low viscosity due to small number of branches
  • Outstanding capacity to absorb large quantities of fillers