Patent ID: 7786033

Claim:
A substrate, comprising: a fibrous material including mineral fibers adhered to each other by a single coating only, the fibrous material being in the form of mineral wool, reinforcing threads, a mat or web obtained from reinforcement threads, and/or a web obtained from glass wool; and the coating having photocatalytic properties provided over at least a portion of a surface of the fibrous material, wherein the single coating includes at least partially crystallized semiconductor material which is at least partially precrystallized in anatase form when it is incorporated into the single coating, which has photocatalytic properties, and which includes oxide or sulphide materials, and a bonding agent configured to adhere the mineral fibers of the fibrous material to each other, the bonding agent including an adhesion promoting agent, which includes one or more organic polymers, configured to promote the adhesion of the single coating to the fibrous material, the bonding agent being selected from one of an adhesive agent for the mineral wool, a sizing agent for the reinforcing threads, a bonding agent for the mat or web obtained from reinforcement threads, and an adhesive agent for the web obtained from glass wool.