Source: Wevo-Chemie
WEVOSIL 23010 and WEVOSIL 23030 are two new liquid silicone rubbers (LSRs) specially developed for silicone textile coatings and sealing applications. Both materials combine processability with high elasticity, temperature resistance and adhesion. They are said to enable new possibilities for precise and automated manufacturing processes using dispensing on textiles, plastics and metals. Designed for use under a wide range of environmental conditions, these two new LSRs offer a temperature range from –60 to +200°C and also have demonstrated high performance in thermal-shock tests. The mechanical properties of the materials have been optimized for the durability demanded by coating and sealing applications. WEVOSIL 23010 is a very soft LSR silicone that combines high elasticity with robustness, offering an elongation at break of over 900% and a tensile strength of 5.5 N/mm². It also provides good initial adhesion on textiles or polymer surfaces without the need for primers. The material is suitable as a silicone textile coating to reinforce technical textiles. It can also be used for permanently bonding textile layers and embedded electronics. These properties enable the manufacturing of smart textiles, such as protective clothing for firefighters or military applications as well as sportswear with extended functionalities WEVOSIL 23030 is a classic LSR silicone offering an elongation at break of over 500% and a tensile strength of 5.0 N/mm². After post-curing, the material exhibits good adhesion to substrates such as metals and plastics, making it particularly suitable for applications with demanding requirements in terms of long-term stability and temperature resistance. Dispensing capabilities open up numerous fields of application. A key focus is sealing as Cured- or Formed-in-Place Gaskets (CIPG or FIPG) in stacks and bipolar plates for fuel cells and electrolyzers, as well as the attachment of electronic components to clothing for extended functionalities. Supporting cross-linking without abrasive fillers means both of these liquid silicones can be precisely and reliably applied in fully or partially automated production processes. In addition, processing parameters, such as flow behavior, pot life and curing speed, can be accurately adapted to suit individual user requirements on request. This enables seamless integration into existing production lines or the use of alternative application methods alongside dispensing. — Wevo-Chemie GmbH, Stuttgart, Germany