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Materials

 

Custom Rubber and Elastomer Compounds: Unique Formulas Mixed In-House

Flexan concentrates on developing custom rubber compounds for custom applications, having developed more than 1,000 proprietary formulas for our clients. Our chemists provide in-house R&D in our specialized lab, which has led to such breakthroughs as the industry-leading Q-Flex material for hearing aids. Learn more about our compounding process.

Understanding Thermoset Elastomers

An elastomer is a polymer with viscoelasticity, which simultaneously exhibits the properties of a very thick fluid and a flexible solid.Thermoset elastomers are a class of polymers that are cured by cross linking molecular chains during the molding process, which requires the right amount of pressure and temperature to set the part into its permanent shape. Unlike plastics, which can break under pressure or melt in intense heat, rubber and elastomers hold up well to dynamic operating conditions, temperature variations, and harsh environments.

Rubber is the common name used for a variety of elastomers, but natural rubber is one of the least commonly used materials in industrial applications. When selecting the right elastomer for the application, our chemists and engineers consider such factors as the part’s operating conditions and the material’s ability to resist such environmental hazards as contact with oil and other fluids, abrasion, and temperature fluctuations, as well as the material’s cost.

In preparing a rubber compound for a specific application, we develop a recipe of the proper elastomer plus a mix of specialized additives to address such issues as resistance to UV, ozone or oil, bonding, and electrical conductivity.

Elastomer Families

General Purpose Elastomers
Lower cost materials for standard applications

  • EPDM
  • Natural rubber 
  • Poly-isoprene 
  • SBR
  • Silicone

High Performance Elastomers
Engineered materials that hold up best under extreme conditions

  • FKM 
  • FSI 
  • HNBR

Oil/Hydrocarbon-Resistant Elastomers
Wide range of solutions based on the specific oil or chemical

  • FKM 
  • FSI 
  • HNBR 
  • NBR 
  • Neoprene
  • Urethane

High Temperature Elastomers
275°F/135°C and above

  • EPDM 
  • FKM 
  • FSI 
  • HNBR 
  • Silicone

Low Temperature Elastomers
- 20°F/-29°C and below

  • Butyl rubber
  • EPDM 
  • FKM 
  • FSI 
  • HNBR 
  • NBR 
  • Neoprene
  • Silicone

Taking the Guesswork out of Rubber Molding & Compounding