Dollfus & Muller manufactures the woven polyester fabrics used in salt pre-soaking systems in road saltspreaders.
During winter time, roads are salted in order to be safer. Some saltspreaders are equipped with a brine production, using the Dollfus & Muller dissolution bag inserted in their tank. Water permeates the salt in the woven bag's filtering surface and is converted into brine ready for use.
For instance, Dollfus & Muller manufactures the model WERIT AV 1998.