Elastomer / Bonding formulation

We create and produce our elastomers internally according to your needs.

The mixture formula is drawn up from precise specifications, complying with criteria such as hardness, colour, mechanical properties, chemical strength, fire resistance, etc., but it must also comply with our regulatory intelligence, and sometimes simply with the analysis of your product’s function.

As raw elastomers are not ready-to-use materials, we have laboratories on each of our sites. Our teams of chemists are recognised through client certifications such as Renault, Safran, GE Aerospace, etc.  The rubber formulas mainly contain the following base elements: elastomer gums, vulcanising agents, plasticisers, fillers and colouring. This operation is known as mixing. It is carried out on our internal mixers.

Our material developments benefit from the synergy of our different sites and sectors of activity:

  • NR: Natural Rubber
  • IR: Isoprene Rubber
  • BR: Butadiene Rubber
  • SBR: Styrene-Butadiene Rubber
  • NBR: Nitrile Butadiene Rubber
  • NBR/PVC: Nitrile / Polyvinyl Chloride
  • IIR: Isobutylene Isoprene Rubber
  • EPDM: Ethylene Propylene Diene Monomer Rubber
  • CR: Polychloroprene Rubber
  • CM: Chlorinated Polyethylene Rubber
  • CSM: Chlorosulphonated Polyethylene Rubber
  • HNBR: Hydrogenated Nitrile Butadiene Rubber
  • FPM: Fluorinated Rubber
  • EVM: Ethylene Vinyl Acetate
  • T: Polysulfide
  • PU: Polyurethane
  • MQ: Silicone
  • MFQ: Fluoride Silicone
  • ACM: Acrylic Rubber
  • AEM: Ethylene Acrylate Copolymer
  • CO: Epichlorhydrin Rubber
  • ECO: Epichlorhydrin  Copolymer Rubber

Many other rubber mixtures exist, don’t hesitate to contact us.

Bonding: The chemical link between the rubber and the substrate (plastic, aluminium, steel, brass, stainless steel, other alloys) that guarantees high performance bonding:

For example: Destructive validation test between two metal tubes

A force is applied to the inner tube, the bonding is considered compliant when the bonding breaks at the heart of the gum. No “unbonding” cracks between the substrate and the rubber are acceptable.

Bonding is often achieved using the simplified process described below:

  • Preparation of the surface of the substrate to bond to: Degreasing, sand blasting, specific surface treatment
  • Application of the adhesives on the substrate, differing depending on the selected elastomer family (Nitrile, CR, NR, EPDM, ECO, FPM, etc.)
  • Overmoulding operation, whatever the technology used (injection, transfer or compression), bonding occurs under the effect of temperature and pressure.

Bonding develops at the same time as the vulcanisation of the elastomer. The units thus created have performances that are higher than products that are simply “glued”. Bonding is an integral part of our know-how, and because it is adapted depending on your applications and specifications, please contact us for further details.

Contact DELMON Group